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EGS_PWR - Nordvall.org

1. E N T MAP SENSOR ENGINE COOLANT TEMPERATURE SENSOR UNDER COIL L oa FUEL A PRESSURE TEST PORT T NS INTAKE MANIFOLD 5 ENGINE COOLANT 3290505 TEMPERATURE SENSOR 2 0L AND 2 4L CAMSHAFT POSITION SENSOR e CRANKSHAFT POSITION SENSOR 3310101 3360105 3 0L 3 0L MAP SENSOR DISTRIBUTOR or SENSOR UNDER CAP 7 Le cc gt Ok T o kz GA i amp AN T w CRANKSHAFT Sires WU pe SEQ 2 ENGINE COOLANT CAMSHAFT SENSOR 3360602 TEMPERATURE SENSOR CONNECTOR 3360801 328 COMPONENT LOCATIONS 3 3L AND 3 8L 3 3L AND 3 8L x CRANKSHAFT POSITION TRANSAXLE SENSOR HOUSING 4 2 Qe 22 re na 2 me L T 5 a 3340306 42 ZS 3340304 2 0L AND 2 4L 3 3L and 3 8L MAP SENSOR MAP SENSOR LL CONNECTOR 5 INTAKE MANIFOLD TRANSAXLE EXTENSION HOUSING SPEED SENSOR 2400205 329 COMPONENT LOCATIONS c 9 8 4 SENSORS Continued 3 0L 1 1 3 3L AND 3 8L 1 1 OXYGEN SENSOR OXYGEN SENSOR CONNECTOR CONNECTOR E yi lt lt eS aa FCCC HSS A NA s
2. Plug Cable that was initially used to test for spark Perform Powertrain Verification Test VER 1A No Test Complete Ignition Off ENGINE 2 0L Disconnect the Coil Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE Inspect Terminals 3 3L V6 and or EN Is any Terminal damaged pushed out or miswired GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt Repair Terminal s for damage pushout miswiring Perform Powertrain Verification Test VER 1A gt GoTo 30 294 STARTING CHECKING THE SECONDARY IGNITION SYSTEM Continued ACTION APPLICABILITY Ignition On Engine Not Running ENGINE 2 0L With the DRB actuate Ignition Coil 1 2 4L 1 4 DOHC With a Voltmeter measure the ASD Relay Output Circuit and or ENGINE Is the voltage above 10 volts 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes Replace Coil Perform Powertrain Verification Test VER 1A gt GoTo 31 Ignition Off ENGINE 2 0L Disconnect the Coil Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE Disconnect the ASD Relay 3 3L V6 and or EN Note Check connectors Clean repair as necessary GINE 3 8L V6 Using a umper Wire connect the ASD Relay Output Circuit to Ground at the and or ENGINE Ignition Coil Connector 3 3L V6 FFV With an Ohmmeter measure the
3. 313 TRANSPONDER RESPONSE 15 dean eek wa 313 atid aes 315 VERIFICATION TESTS VERIFICATION TESTS eek tthe sackets es 317 COMPONENT 8 323 8 1 CONTROL MODULES AND 323 82 CONTROLS amp SOLENOIDS 323 8 3 DATA LINK CONNECTOR 327 24 22 327 8 5 330 8 6 SWITCHES epee bee 331 8 7 SPECIFICATIONS 332 9 0 TABLE OF CONTENTS Continued CONNECTOR PINOUTS sense 333 COMPRESSOR CLUTCH BLACK 2 333 AMBIENT TEMPERATURE SENSOR GRAY 2 333 AMBIENT TEMPERATURE SENSOR SENSOR SIDE 2 333 BRAKE LAMP SWITCH GRAY 6 WAY 333 BRAKE SHIFT INTERLOCK SOLENOID EXCEPT BUILT UP EXPORT 2 WAY 334 CAMSHAFT POSITION SENSOR BLACK 3 334 CLOURSPAING
4. 151 P 0500 VEHICLE SPEED SENSOR SIGNAL 153 P 0505 IDLE AIR CONTROL MOTOR CIRCUITS cc2c0ccsaceseuas eraser sas 159 F 05056 IDLE AIR CONTROL MOTOR CIRCUIT 164 P 0505C IDLE AIR CONTROL MOTOR CIRCUIT 2 2 2 165 F 05050 IDLE AIR CONTROL MOTOR CIRCUIT 24 vc ve bebe 166 0505 IDLE AIR CONTROL MOTOR CIRCUIT ccs cccceeveeesesevanaveeas 167 0600 PCM FAILURE SPI COMMUNICATIONS ano 204 sx eew vax 168 0601 INTERNAL CONTROLLER FAILURE 525 2555 5 6 cieawdsawed eee ee 169 0645 A G CLUTCH RELAY CIRCUIT csexc useondcerndoe pag ewan 170 P 0703 BRAKE SWITCH STUCK PRESSED OR RELEASED 172 1195 SLOW 1 1 025 DURING CATALYST 175 P1261 ENGINE IS GOLD TOO LONG dite cies bere beso wae 177 P1282 FUEL PUMP RELAY CONTROL CIRCUIT as 178 1294 TARGET IDLE NOT REACHED 180 1297 CHANGE IN FROM START TO 183 P 1388 AUTO SHUTDOWN RELAY CONTROL 186 1389 NO ASD RELAY OUTPUT VOLTAGE AT 188 P1391 INTERMITTENT LOSS OF CMP OR 191 1398 MISFIRE ADAPTIVE NUMERATOR AT
5. APPLICABILITY NOTE Replacing the Powertrain Control Module will not correct this All problem With the DRB read the DTCs 15 the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 3 GoTo 2 At this time the conditions required to set this DTC are not present With the DRB perform the LDP Monitor Test Follow the instructions on the DRB and allow the PCM torun the monitor After the monitor has finished running does the DRB show TEST FAILED THIS TRIP YES on the monitor screen Yes gt GoTo 3 No TheEvap Leak Monitor DTC is not present at this time Perform VERIFICATION TEST VER 6A 140 DRIVEABILITY P 0442 EVAP LEAK MONITOR SMALL LEAK DETECTED Continued ACTION APPLICABILITY Note Leaving the Gas Cap loose could cause this trouble code to set All To continue testing you will need Miller Tool Kit 6872A and 8382 NOTE The Fuel Tank must have 1 2 tank of fuel to perform this test Perform Evaporative System Pressure Pump Self Test that is specified on the tester cover Warning Verify the vehicle fuel tank contains at least 3 gallons of fuel Attach the DRB III to the vehicle Turn the Key On At ENGINE SYSTEM TESTS select LEAK DETECTION PUMP TEST Read instructions and then press ENTER At LEAK DETECTION PUMP TEST select 3 HOLD PSI At the vacuum hose going to the LDP attach and apply a continuous vacuum i e 20 Ho Remove Gas Cap Install
6. be overlooked as a possible cause 1 ENGINE VALVE TIMING must be within specifications ENGINE COMPRESSION must be within specifications ENGINE EXHAUST SYSTEM must be free of any restrictions ENGINE PCV SYSTEM must flow freely FUEL must be free of contamination THROTTLE BODY must be free of any coking conditions IDLE AIR CONTROL MOTOR passages must be free of any debris or carbon 2 3 4 5 6 ENGINE SECONDARY IGNITION CHECK must exhibit a normal scope pattern 7 8 Always look for any Technical Service Bulletins that may relate to this condition Test Complete 301 TRANSMISSION Symptom P 0740 TORQUE CONV CLUTCH NO RPM DROP AT LOCKUP When Monitored and Set Condition P 0740 TORQUE CONV CLUTCH NO RPM DROP AT LOCKUP When Monitored Continuously when no matured or maturing Trouble Code and throttle position gt 10 and constant for 4 4 seconds before TCC engagement requested No TCC solenoid circuit any cam crank related code VSS any TPS related code and Battery voltage gt 11 0 Set Condition Torque Converter malfunctions that are detected are the FTC not locking up properly when desired and the torque converter not unlocking properly when desired 3 consecutive test failures over one trip will store the code 2 bad trips will set the code POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN DIFF SHAFT OR GEARS DEFECTIVE TCC SOL DEFECTIVE TORQUE CONVERTER ASSEMBLY
7. APPLICABILITY Ignition Off All Disconnect the PCM Connector Note Check connectors Clean repair as necessary Connect a jumper wire to the Radiator Fan Relay Control Circuit at the PCM Turn the ignition on Momentarily connect the other end of the jumper wire to a good ground Did the Radiator Fans actuate Yes gt GoTo 10 No Replace the Radiator Fan Relay Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 205 DRIVEABILITY Symptom P 1494 LEAK DETECTION PUMP PRESSURE SWITCH When Monitored and Set Condition P 1494 LEAK DETECTION PUMP PRESSURE SWITCH When Monitored Immediately after a cold start with ambient temperature between 4 deg C 40 deg F and 32 deg C 90 deg F and coolant temperature within 12 deg C 10 deg of ambient temperature Set Condition The state of the switch does not change when the solenoid is energized POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN LDP PRESSURE SWITCH CIRCUIT SHORTED TO GROUND LDP SWITCH SENSE CIRCUIT OPEN LDP DEFECTIVE LDP WIRING HARNESS INTERMITTENT DEFECT LDP WIRING HARNESS OBSERVABLE DEFECT LDP VACUUM HOSE LEAKING OR OBSTRUCTED PCM DEFECTIVE APPLICABILITY Start the engine and allow the engine to idle All With the DRB perform the Leak Detect Pump
8. 3390102 2 0L 2 4L 3 3L AND 3 8L 0 669 PRESSURE HOSE FROM EVAPORATIVE CANISTER 2 0L AND 2 4L ENGINE WIRING HARNESS GENERATOR A C CLUTCH FIELD CONNECTOR CONNECTOR 3440206 324 3 0L 3 3L AND 3 8L GENERATOR 3380506 2 0L AND 2 4L ELECTRICAL CONNECTOR IGNITION COIL 3280105 COMPONENT LOCATIONS 2 0L AND 2 4L lt lt IDLE AIR CONTROL ae MOTOR CONNECTOR 42m20v0s00 THROTTLE POSITION SENSOR CONNECTOR A _ L 5 3 3L AND 3 8L THROTTLE POSITION n YO ee am THROTTLE BODY L 4 gt SENSOR ki lt L 7 7 94 i lt aw Va H A CU LL oe A PF ES IDLE AIR CONTROL MOTOR 3390101 IGNITION COIL CONNECTOR 1190203 COMPONENT LOCATIONS 8 2 CONTROLS amp SOLENOIDS Continued 3 3L AND 3 8L LO L T 5 IGNITION COIL CONNECTOR 0790106 3 0L NOTE INJECTORS 1 3 AND 5 ARE LOCATED UNDER THE INTAKE PLENUM 1 3 5 Sedi re 4 it lt i z we SIE enn 5 4 OTRS of WAN ERENT 8 1 AN 1 Fe PU UE sF EAH F 7 gt I
9. A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT FUEL INJECTOR NO 4 3 3L 3 8L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 1 14 18LB BR FUEL INJECTOR NO 2 DRIVER FUEL INJECTOR NO 4 2 0L 2 4L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 14 18LB BR FUEL INJECTOR NO 4 DRIVER A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT FUEL INJECTOR NO 5 3 3L 3 8L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 2 K38 18GY FUEL INJECTOR NO 5 DRIVER 339 R in 2 CONNECTOR PINOUTS FUEL INJECTOR NO 6 3 3L 3 8L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 142 18DG 0R AUTOMATIC SHUT DOWN RELAY OUTPUT FUEL INJECTOR 2 K58 18BR DB FUEL INJECTOR NO 6 DRIVER NO 6 3 3L 3 8L FUEL TANK MODULE LIGHT GRAY 4 WAY CAV CIRCUIT FUNCTION 1 21 14BK GROUND 2 3 G4 1808 FUEL LEVEL SENSOR SIGNAL 4 141 16DGIWT FUEL PUMP RELAY OUTPUT FUEL TANK MODULE N N E HETO 9 ce 9 0 R 2 4 a oO GENERATOR GENERATOR SIDE gt CIRCUIT FUNCTION a 1 ASD RELAY OUTPUT TNTA 2 GENERATOR FIELD DRIVER N 27 1 3 re 4 T TS 5 CASE GROUND i 5 7 _ 4
10. POOR CONNECTION 1 1 2 SENSOR SIGNAL CKT HIGH RESISTANCE 1 1 02 SENSOR SIGNAL POOR CONNECTION 1 1 02 SENSOR SLOW RESPONSE EXHAUST LEAK 1 1 025 SLOW RESPONSE DOES REOCCUR ACTION APPLICABILITY With the DRB read the DTCs All Is the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 5 No gt GoTo 2 Turn Ignition On Engine Off During the following voltage drop measurement wiggle wires between O2S Connec tor and PCM Connector Using a voltmeter backprobe 025 Sensor Ground Circuit between 025 Connector Sensor Ground and PCM Connector Sensor Ground While wiggling wires is the voltage drop reading below 0 10 VDC Yes gt GoTo 3 No Repair poor connection high resistance on O2 Sensor Ground Circuit Perform VERIFICATION TEST VER 5A3 57 DRIVEABILITY P 0133 1 1 O2S SLOW RESPONSE Continued ACTION APPLICABILITY Turn Ignition On Engine Off During the following voltage drop measurement wiggle wires between O2S Connec tor and PCM Connector Using a voltmeter backprobe O2S Signal Circuit between 025 Connector 025 Signal and PCM Connector 025 Signal While wiggling wires is the voltage drop reading below 0 10 VDC Yes gt GoTo 4 No Repair poor connection high resistance on 025 Signal Circuit Perform VERIFICATION TEST VER 5A3 At this time the 1 1 025 SLOW RESPONSE does not exist or is an intermittent problem With the DRB read the FRE
11. 123 DRIVEABILITY P 0351 IGNITION COIL 1 PRIMARY CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A Test Complete 124 DRIVEABILITY Symptom P 0352 IGNITION COIL 2 PRIMARY CIRCUIT MMMM When Monitored and Set Condition P 0352 IGNITION COIL 2 PRIMARY CIRCUIT When Monitored With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running and none of the coils in dwell when checked Set Condition Peak current is not achieved with 2 5ms of dwell It takes 3 seconds during cranking or up to 6 seconds while running to set POSSIBLE CAUSES AUTO SHUTDOWN OUTPUT CIRCUIT OPEN IGNITION COIL CONNECTOR TERMINAL OBSERVABLE DEF IGNITION COIL 2 DRIVER CIRCUIT OPEN IGNITION COIL 2 DRIVER CIRCUIT SHORTED TO GROUND IGNITION COIL CIRCUIT WIRING HARNESS INTER DEFECT IGNITION COIL CIRCUIT WIRING HARNESS OBS DEFECT IGNITION COIL 2 DEFECTIVE PCM DEFECTIVE IGN COIL 2 ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read codes Is the Global Good Trip displayed and equal to 0 Yes gt GoTo 2 No gt GoTo 8 Ignition Off Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary Ignition on engine not running With the DR
12. 244 CHECKING MAP SENSOR CALIBRATION 245 CHECKING MINIMUM IDLE AIR eG bebe 246 CHECKING OXYGEN SENSOR HEATER 25 2555 555 0 59 Pardue wee 247 CHECKING PARK NEUTRAL POSITION SWITCH 22 2 2 4 249 CHECKING PCM POWER AND GROUND CIRCUITS 251 CHECKING SECONDARY IGNITION Ea sew eens xe 252 CHECKING THE ENGINE MECHANICAL SYSTEMS 253 CHECKING THROTTLE POSITION SENSOR CALIBRATION 254 CHECKING THE A C PRESSURE SENSOR 255 TABLE OF CONTENTS Continued SPEED CONTROL P1595 SPEED CONTROL SOLENOID CIRCUITS 256 P 1683 SPEED CONTROL POWER RELAY OR S C 12V 256 SPEED CONTROL BRAKE SWITCH OUTPUT 261 SPEED CONTROL DENIED MESSAGE 263 SPEED CONTROL ON OFF SWITCH 264 CHECKING SPEED CONTROL OPERATION be be 266 STARTING NO RESPONSE CONDITION 272 CHECKING THE CAM AND CRANK SENSORS 276 CHECKING THE ENGINE MECHANICAL SYSTEMS 277 CHECKING THE FUEL SY SEN 52252496 E 278 CHECKING THE IDLE AIR CONTROL MOTOR 2 02 000000 ers ev see ewans
13. APPLICABILITY Ignition Off ENGINE 2 0L Warning The Fuel System must be opened may be under high pressure 2 41 1 4 DOHC Release the Fuel pressure and or ENGINE Inspect Fuel Return Tube for restriction between fuel Filter and Fuel Pump Module 3 3L V6 FFV and or Is there a restriction ENGINE 3 3L V6 and or ENGINE 3 8L V6 Yes Replace restricted Fuel Tube Perform Powertrain Verification Test VER 1A No Test Complete Ignition Off ENGINE 2 0L Warning The Fuel System must be opened and may be under high pressure 2 41 1 4 DOHC Relieve Fuel pressure and or ENGINE Fuel Pressure Gauge into the Fuel Hose using tool 6433 3 3L V6 FFV and or Note The Fuel Tank must be at least 1 4 full for the following tests ENGINE 3 3L V6 Ignition On Engine Not Running and or ENGINE With the DRB actuate the Fuel System 3 8L V6 Read the Fuel Pressure Gauge Fuel pressure should be 43 to 53 PSI for Gasoline 50 to 60 PSI for E85 Ethanol 15 the Fuel pressure below the specification Yes gt GoTo 26 No Test Complete Ignition Off ENGINE 2 0L Warning The Fuel System must be opened and be under high pressure 2 4L 1 4 DOHC Release Fuel pressure and or ENGINE Remove adapter 6631 and reinstall Fuel Line 3 3L V6 FFV and or Install adapter 6631 between Fuel Pump and Fuel Filter ENGINE 3 3L V6 Connect Fuel Pressure Gauge to adapter 6631 and or ENGINE Key On 3 8L V6
14. BLACK 002 CLUTCH INTERLOCK SWITCH JUMPER EATX CRANKSHAFT POSITION SENSOR CONNECTOR PINOUTS CLOCKSPRING C3 BLACK 2 WAY CAV CIRCUIT X10 20RD DB FUNCTION RADIO MUX X20 20RD BK RADIO CONTROL MUX CLUTCH INTERLOCK SWITCH MTX BLACK 2 WAY CAV CIRCUIT FUNCTION F45 20YL RD RHD IGNITION SWITCH OUTPUT START F45 20YL LHD IGNITION SWITCH OUTPUT START T141 20YL RD IGNITION SWITCH OUTPUT START CLUTCH INTERLOCK SWITCH JUMPER EATX BLACK 2 WAY CAV CIRCUIT FUNCTION 1 T141 20YL RD RHD IGNITION SWITCH OUTPUT START 1 T141 20YL LHD IGNITION SWITCH OUTPUT START 2 T141 20YL RD RHD IGNITION SWITCH OUTPUT START 2 T141 20YL LHD IGNITION SWITCH OUTPUT START CRANKSHAFT POSITION SENSOR BLACK 3 WAY CAV CIRCUIT FUNCTION 1 K7 180R 8V SUPPLY 2 K4 18BK LB SENSOR GROUND 3 K24 18GY BK CRANKSHAFT POSITION SENSOR SIGNAL 335 R ie 2 CONNECTOR PINOUTS 9 16 DATA LINK CONNECTOR R ENGINE COOLANT TEMPERATURE SENSOR 4 2 ENGINE OIL PRESSURE SWITCH DATA LINK CONNECTOR BLACK 16 WAY CAV CIRCUIT FUNCTION J 2 3 Dt 20VT BR CCD BUS
15. Canister Perform VERIFICATION TEST VER 6A GoTo 7 To perform this test you will need Miller Tool Kit 6872A and 6922 Caution Refer to safety information Perform Evaporative System Pressure Pump Self Test that is specified on the tester cover Connect the Evap Pressure Pump Supply to Gas Cap Adapter and install on vehicle Start Engine With the DRB go to LDP SYSTEM TEST and follow instructions on the screen Using Pressure Tool 6872A set Pressure Hold to Open and set Vent to Closed Turn Pump Timer On Allow Pressure Pump to build pressure up to at least 14 H20 Remove hose at Evap Canister that goes to Fuel Tank Did pressure drop when hose was disconnected Yes Replace the Evaporative Canister Perform VERIFICATION TEST VER 6A No Repair the pinched hose from the Gas Tank to the Canister Perform VERIFICATION TEST VER 6A 202 DRIVEABILITY Symptom P 1491 RADIATOR FAN CONTROL RELAY CIRCUIT E When Monitored and Set Condition P 1491 RADIATOR FAN CONTROL RELAY CIRCUIT When Monitored With theignition key on battery voltage greater than 10 volts and the PCM requests the fans to be turned on Set Condition An open or shorted condition is detected in the radiator fan relay control circuit POSSIBLE CAUSES FUSED B CIRCUIT OPEN RAD FAN RELAY OUTPUT CIRCUIT 0 VOLTS TO BATTERY V RADIATOR FAN RELAY GROUND CIRCUIT OPEN RADIATOR FAN RELAY DEFECTIVE RAD FAN RELAY CONTROL CIRCUIT
16. P 0123 THROTTLE POSITION SENSOR VOLTAGE HIGH When Monitored With the ignition on Set Condition TP sensor signal voltage goes above 4 5 volts for 704 seconds POSSIBLE CAUSES THROTTLE POSITION SENSOR GROUND CIRCUIT OPEN THROTTLE POSITION SENSOR SIGNAL CIRCUIT OPEN TPS SIGNAL CKT TO TPS 5 VOLT SUPPLY CKT SHORTED TPS WIRING HARNESS INTERMITTENT DEFECT TPS WIRING HARNESS OBSERVABLE DEFECT POWERTRAIN CONTROL MODULE DEFECTIVE TPS THROTTLE POSITION SENSOR VOLTAGE BELOW 1 0 VOLT THROTTLE POSITION SENSOR VOLTAGE CHANGE NOT SMOOTH APPLICABILITY Ignition On Engine Not Running All Using the DRB read the Throttle Position Sensor voltage 15 the Throttle Position Sensor voltage above 4 5 volts Yes gt GoTo 2 No GoTo 8 Ignition Off Disconnect the Throttle Position Sensor Connector Note Check connectors Clean repair as necessary Ignition On With the DRB actuate theASD relay Measure the voltage of the TP sensor signal circuit Is the voltage above 4 9 volts Yes Repair the short voltage the Throttle Position Sensor Signal Circuit Perform Powertrain Verification Test VER 5A GoTo 3 48 DRIVEABILITY P 0123 THROTTLE POSITION SENSOR VOLTAGE HIGH Continued ACTION APPLICABILITY Ignition Off All Disconnect the Throttle Position Sensor Connector Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure b
17. Yes gt GoTo 4 No Replace the EGR Solenoid Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Disconnect the EGR Solenoid Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the EGR Solenoid Control Circuit Is the resistance below 5 0 ohms Yes gt GoTo 5 No the open EGR Solenoid Control Circuit Perform Powertrain Verification Test VER 2A No gt GoTo 6 Ignition Off If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition On Engine Not Running With the DRB actuate the EGR Solenoid Wiggle Wiring Harness from the Solenoid to PCM Feel the EGR Assembly Does the EGR Solenoid stop actuating Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 2A GoTo 8 Ignition Off All Disconnect the PCM Connector Note Check connectors Clean repair as necessary Disconnect the EGR Solenoid Connector Check connectors Clean repair as necessary Using an Ohmmeter measure the EGR Solenoid Control Circuit at the EGR Solenoid Connector to a good ground Is the resistance below 5 0 ohms Yes gt Repair the EGR Solenoid Control Circuit short to ground Perform P
18. 13 DIAGNOSTIC INFORMATION AND 15 CHARGING P 0622 GENERATOR FIELD NOT SWITCHING PROPERLY 16 TABLE OF CONTENTS Continued P 1492 BATTERY TEMP SENSOR VOLTAGE TOO HIGH 18 P 1493 BATTERY TEMP SENSOR VOLTAGE TOO 18 P 1594 CHARGING SYSTEM VOLTAGE TOO 19 P 1682 CHARGING SYSTEM VOLTAGE TOO 21 CHECKING CHARGING SYSTEM OPERATION WITH NO DTC S 24 DRIVEABILITY P 0106 BAROMETRIC PRESSURE OUT OF 27 P0107 MAP SENSOR VOLTAGE TOO LOW 2 255658558 ewes 30 P 0108 MAP SENSOR VOLTAGE TOO HIGH 32 P 0112 INTAKE AIR TEMP SENSOR VOLTAGE 34 0113 INTAKE AIR TEMPERATURE SENSOR VOLT HIGH 36 P 0117 SENSOR VOLTAGE TOO LOW uc ie ong heme oe 38 0118 SENSOR VOLTAGE TOO 2 2555 5548 lt 55 eres duds ees 40 0121 TPS VOLTAGE DOES NOT AGREE WITH 42 P 0122 THROTTLE POSITION SENSOR VOLTAGE 45 P 0123 THROTTLE POSITION SENSOR VOLTAGE 48 0125 CLOSED LOOP TEMP 51 P 0131 1 1 O2 SENSOR VOLTAGE SHORTED 53 0132 1 1 O2 SEN
19. 4 5 21 GENERATOR BLACK 3 WAY CAV CIRCUIT FUNCTION 1 142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 2 K20 1806 GENERATOR FIELD DRIVER 3 GENERATOR 340 CONNECTOR PINOUTS IDLE AIR CONTROL MOTOR BLACK 4 WAY CAV CIRCUIT FUNCTION 1 18VT BK IDLE AIR CONTROL NO 4 DRIVER 2 K40 18BR WT IDLE AIR CONTROL NO 3 DRIVER IDLE AIR K60 18YL BK IDLE AIR CONTROL NO 2 DRIVER 4 K39 18GY RD IDLE AIR CONTROL NO 1 DRIVER CONTROL MOTOR BLACK 1 IGNITION COIL PACK 2 0L 2 4L BLACK 3 WAY 000 CAV CIRCUIT FUNCTION 3 1 1 17 18DG TN IGNITION COIL NO 2 DRIVER 2 142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT K19 18GY RD IGNITION COIL NO 1 DRIVER IGNITION COIL PACK 2 4L IGNITION COIL PACK 3 3L 3 8L BLACK 4 WAY CIRCUIT FUNCTION T 1 K17 180 3 3L GNITION COIL NO 2 DRIVER 1 18 18RD YL 3 81 GNITION COIL 3 DRIVER R 2 A142 18DG OR 3 3L AUTOMATIC SHUT DOWN RELAY OUTPUT 4 2 19 18GY RD 3 8L GNITION COIL 1 DRIVER 3 A142 18DG OR 3 8L AUTOMATIC SHUT DOWN RELAY OUTPUT P K19
20. 86 F87 18WT BK FUSED IGNITION SWITCH OUTPUT ST RUN GAS 86 142 18DG OR DIESEL POWER RELAY OUTPUT DIESEL 87 18DB BK COMPRESSOR CLUTCH RELAY OUTPUT 87A AUTOMATIC SHUT DOWN RELAY GAS CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 51 18DB YL AUTOMATIC SHUT DOWN RELAY CONTROL 86 AO 6RD BE 87 142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 87A CIGAR LIGHTER ACCESSORY RELAY CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 71 18BK GROUND 86 Fi 2008 FUSED IGNITION SWITCH OUTPUT RUN ACC 87 0 16RD CIGAR LIGHTER ACCESSORY RELAY OUTPUT 87A 346 DIESEL POWER RELAY CONNECTOR PINOUTS CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 K51 20DB YL DIESEL POWER RELAY CONTROL 86 AO 6RD FUSED B 87 142 18DG OR DIESEL POWER RELAY OUTPUT 87A ENGINE STARTER MOTOR RELAY CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 90 18 SMART START RELAY CONTROL 86 45 20YL RD EATX FUSED IGNITION SWITCH OUTPUT START 86 1141 20YL RD MTX FUSED IGNITION SWITCH OUTPUT START 87 740 12BR STARTER RELAY OUTPUT 87A FRONT BLOWER MOTOR RELAY CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 71 18BK GROUND 86 F20 20WT FUSED IGNITION SWITCH OUTPUT RUN 87 C71 1208 BLOWER MOTOR DRIVER
21. Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Turn ignition on with engine not running Using a Voltmeter measure the voltage from 8 Volt Supply Circuit in the CKP Sensor Connector 15 the voltage above 7 0 volts Yes gt Replace the Camshaft Position Sensor Perform Powertrain Verification Test VER 2A No GoTo 16 Ignition Off Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the 8 Volt Supply Circuit from the CKP Sensor Connector to the PCM Connector Is the resistance below 5 0 ohms Yes gt GoTo 17 No Repair the open 8 Volt Supply Circuit Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary 111 DRIVEABILITY P 0320 NO CRANK REFERENCE SIGNAL AT PCM Continued ACTION APPLICABILITY Ignition Off All Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using
22. Engine Timing The PCM cannot detect an incorrectly indexed timing chain camshaft sprocket or crankshaft sprocket The PCM also cannot detect an incorrectly indexed distributor Fuel Pressure Fuel pressure is controlled the fuel pressure regulator The PCM cannot detect GENERAL INFORMATION a clogged fuel pump inlet filter clogged in line filter or a pinched fuel supply Fuel Injectors The PCM cannot detect if a fuel injector is clogged the pintle is sticking or the wrong injectors are installed Fuel Requirements Poor quality gasoline can cause problems such as hard starting stalling and stumble Use of methanol gasoline blends may re sult in starting and driveability problems See indi vidual symptoms and their definitions in Section 6 0 Glossary of Terms PCM Grounds The PCM cannot detect a poor system ground However a diagnostic trouble code may be stored in the PCM as a result of this condition Throttle Body Air Flow The PCM cannot detect a clogged or restricted air cleaner inlet or filter element Exhaust System The PCM cannot detect a plugged restricted or leaking exhaust system Cylinder Compression The PCM cannot de tect uneven low or high engine cylinder compres sion Excessive Oil Consumption Although the PCM monitors the exhaust stream oxygen content through the oxygen sensor when the system is in a closed loop it cannot determine excessive oil con sumptio
23. Note Check connectors Clean repair as necessary Using an ohmmeter measure the Ignition Coil 1 Primary Circuit for resistance Is the resistance below 2 0 ohms Yes gt GoTo 5 No Replace the Ignition Coil Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the Ignition Coil 1 Driver Circuit for resistance to ground Is the resistance below 5 0 ohms Yes Repair the Ignition Coil 1 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 5A No gt GoTo 6 Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary With an Ohmmeter test the resistance of 1 Driver Circuit Is the resistance below 5 0 ohms Yes gt GoTo 7 No Repair the open Ignition Coil 1 Driver Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Ignition Off Start Engine Wiggle Wiring Harness from the Ignition Coil to the PCM Does the engine miss or stall Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 5A No gt GoTo 9
24. Repair the open Fused Ignition Switch Output Circuit check Ignition Switch Fuse PDC Perform Powertrain Verification Test VER 1A 274 STARTING RESPONSE CONDITION Continued ACTION APPLICABILITY Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Turn the ignition on With a voltmeter mesure the Fused B Curcuit 15 the voltage above 10 0 volts Yes gt GoTo 15 GoTo 16 If there are no potential causes remaining replace the Powertrain Control Module View repair options Replace the Powertrain Control Module Perform the Powertrain Verification Test VER 1A Remove Fuel Pump Fuse from the Power Distribution Center Inspect the Fuse Is the fuse OK Yes gt GoTo 17 gt GoTo 18 No Repair the B circuit between the Fuse and the battery Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Fuel Pump Relay Disconnect the Fuel Pump Electrical Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the Fuel Pump Relay Output Circuit to ground 15 the resistance below 5 0 ohms Yes Repair theFuel Pump Relay Output Circuit for a short to ground Perform Powertrain Verification Test VER 1A gt GoTo 19 If there potential causes remaining the Fuel Pump is assumed to be defective View repair options Repair Replace the Fu
25. Replace PCM Perform Powertrain Verification Test VER 3A CHARGING P 1594 CHARGING SYSTEM VOLTAGE TOO HIGH Continued ACTION APPLICABILITY Turn ignition on engine not running All Erase trouble codes Refer to symptom CHARGING SYSTEM NO CODE TEST in the CHARGING category Ignition Off Disconnect the Field Harness Connector at back of Generator Note Check connectors Clean repair as necessary Using an ohmmeter measure resistance of one of the Generator Field Terminals at the Generator to Ground Is the resistance below 5 0 ohms Yes Repair or replace the shorted Generator as necessary Perform Powertrain Verification Test VER 3A No GoTo 7 Ignition Off Disconnect the PCM Connector Disconnect the Field Harness Connector at back of Generator Note Check connectors Clean repair as necessary Using an ohmmeter measure the Generator Field Driver Circuit from PCM Connec tor to ground 15 the resistance below 5 0 ohms Yes Repair the Generator Field Driver Circuit short to ground Perform Powertrain Verification Test VER 3A No GoTo 8 Ignition off If there are potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 3A 20 CHARGING Symptom P 1682 CHARGING SYSTEM VOLTAGE TOO LOW When Monitored and Set Condition P 1682 CHARGING SYSTEM VOLTAG
26. Replace the LDP Perform Powertrain Verification Test VER 6A If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 6A 211 DRIVEABILITY Symptom P 1496 5 VOLT SUPPLY OUTPUT TOO LOW aaa gt When Monitored and Set Condition P 1496 5 VOLT SUPPLY OUTPUT TOO LOW When Monitored With the ignition on Set Condition The 5 volt supply to the sensors is below 3 5 volts for 4 seconds POSSIBLE CAUSES 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND 5 VOLT SUPPLY WIRING HARNESS INTER DEF A C PRESSURE SENSOR DEFECTIVE MAP SENSOR DEFECTIVE THROTTLE POSITION SENSOR DEFECTIVE PCM DEF 5 VOLT SUPPLY CIRCUIT ACTION APPLICABILITY Ignition On Engine Not Running All Disconnect the Throttle Position Sensor Connector Note Check connectors Clean repair as necessary With a voltmeter probe the 5 Volt Supply Ckt at the TP Sensor harness connector Note Reconnect TPS Connector after measurement Is the voltage reading below 4 5 volts Yes gt GoTo 2 gt GoTo 6 Ignition On Engine Not Running Disconnect the Throttle Position Sensor Connector Disconnect the A C Pressure Sensor Note Check connectors Clean repair as necessary With a voltmeter probe the TP Sensor 5 Volt Supply Circuit to the TP Sensor Is the 5 Volt Supply Circuit voltage above 4 0 volts Yes Replace the A C Pressure Sensor Perform
27. Set Condition Peak current is not achieved with 2 5ms of dwell It takes 3 seconds during cranking or up to 6 seconds while running to set POSSIBLE CAUSES ASD OUTPUT CIRCUIT OPEN IGNITION COIL 1 CONNECTOR TERMINAL OBSERVABLE DEF IGNITION COIL 1 DRIVER CIRCUIT OPEN IGNITION COIL 1 DRIVER CIRCUIT SHORTED TO GROUND IGNITION COIL CIRCUIT WIRING HARNESS INTER DEFECT IGNITION COIL CIRCUIT WIRING HARNESS OBS DEFECT IGNITION COIL 1 RESISTANCE ABOVE 2 0 OHMS PCM DEFECTIVE IGN COIL 1 APPLICABILITY Ignition On Engine Not Running All With the DRB read codes 15 the Global Good Trip displayed and equal to 0 Yes gt GoTo 2 No gt GoTo 8 Ignition Off Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary Ignition on engine not running With the DRB actuate Ignition Coil 1 With a Voltmeter measure the ASD Output Circuit Is the voltage above 10 0 volts No Repair the open ASD Output Circuit Perform Powertrain Verification Test VER 5A Yes gt GoTo 3 122 DRIVEABILITY P 0351 IGNITION COIL 1 PRIMARY CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary 15 any terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A No gt GoTo 4 Ignition Off Disconnect the Ignition Coil Connector
28. 100 4 degrees F and ambient temperature within 13 degrees 7 2 degrees of coolant temperature Set Condition The upstream O2 Sensor Signal voltage is below 0 156 volt prior to 2 Sensor Heater test cool down period and O2 voltage less than 0 156 volt after the key on in the subsequent start POSSIBLE CAUSES 1 1 02 SENSOR VOLTAGE LOW 1 1 025 SIGNAL CIRCUIT SHORT TO GROUND 1 1 025 SIGNAL SHORT TO GROUND CIRCUIT 1 1 2 SENSOR DEFECTIVE PCM DEFECTIVE 1 1 O2S ACTION APPLICABILITY Ignition Off All Turn ignition on With the DRB monitor the U pstream O2 Sensor voltage for a few minutes Wait three minutes or until the voltage stabilizes between 0 4 and 0 6 volt With the DRB monitor the Upstream O2 Sensor voltage Is the Upstream O2 Sensor voltage below 0 156 volt Yes gt GoTo 2 No The condition required to set this trouble code is not present at this time Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Upstream O2 Sensor Connector Note Check connectors Clean repair as necessary Key on With the DRB monitor the Upstream O2 Sensor voltage Is the Upstream O2 Sensor voltage below 0 156 volts Yes gt GoTo 3 Replace the Upstream O2 Sensor Perform Powertrain Verification Test VER 5A 53 DRIVEABILITY 0131 1 1 O2 SENSOR VOLTAGE SHORTED TO GROUND Continued ACTION APPLICABILITY Ignition Off All Disconnect the Upstream O2 Sensor C
29. 15 the 5 Volt Supply Circuit voltage above 4 0 volts Yes Replace the Map Sensor Perform Powertrain Verification Test VER 2A gt GoTo 4 226 DRIVEABILITY CHECKING 5 VOLT SUPPLY CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Disconnect the Throttle Position Sensor Connector Disconnect the MAP Sensor Electrical Connector Disconnect the A C Sensor Connector Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary With the ohmmeter probe the 5 volt supply circuit at the TPS Connector 15 the resistance below 5 0 ohms Yes Repair the 5 volt Supply Circuit for a short to ground Perform Powertrain Verification Test VER 2A No gt GoTo 5 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition On Engine Not Running Disconnect the MAP Sensor Connector Note Check connectors Clean repair as necessary With the voltmeter probe the 5 Volt Supply Ckt at the MAP Sensor Connector Is the voltage reading below 4 5 volts Yes gt ReplacetheTPS Perform Powertrain Verification Test VER 2A No Test Complete 227 DRIVEABILITY Symptom CHECKING EGR SYSTEM POSSIBLE CAUSES VACUUM LINE TO EGR SOLENOID RESTRICTION OR LEAK VACUUM NIPPLE AT THROTTLE BODY PLUGGED EGR VALVE ASS
30. 15 the resistance below 5 0 ohms Yes gt GoTo 2 No Repair the open Motor Driver Control Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Is any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 3 Ignition Off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 164 DRIVEABILITY Symptom P 0505C IDLE AIR CONTROL MOTOR CIRCUIT POSSIBLE CAUSES IAC MOTOR DRIVER 2 CIRCUIT OPEN PCM CONN IAC 2 TERM DAMAGED PUSH OUT MISWIRED PCM DEF 2 ACTION APPLICABILITY Ignition Off All Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure resistance of the IAC 2 Driver Circuit from the IAC Motor Connector to the PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 2 No Repair the open Motor Driver Control Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Visually inspect Connector Is any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Power
31. 198 P 1486 EVAP LEAK MONITOR PINCHED HOSE FOUND 200 P 1491 RADIATOR FAN CONTROL RELAY 203 P 1494 LEAK DETECTION PUMP PRESSURE 206 P 1495 LEAK DETECTION PUMP SOLENOID 209 P1486 5 VOLT SUPPLY OUTPUT 212 1598 A C PRESSURE SENSOR VOLTS TOO 214 P1589 A C PRESSURE SENSOR VOLTS TOO LOW 217 1695 NO CCD MESSAGE FROM BODY CONTROLLER 220 1696 FAILURE EEPROM WRITE DENIED 222 P 1697 PCM FAILURE SRI MILE NOT 5 222 P 1698 NO CCD MESSAGES FROM 1 020260 lt cceyevewte 224 5 VOLT SUPPLY CIRCUM cca ce eee a we 226 CHECKING EGR SYSTEM 228 CHECKING ENGINE VACUUM 231 CHECKING EVAPORATIVE EMISSION 6 232 CHECKING FOR OXYGEN SENSOR 234 2 5 5 Peseta see ges 237 CHECKING IDLE AIR CONTROL 2 242 CHECKING INTAKE AIR TEMPERATURE
32. 3 0L V6 Remove Distributor Cap and Rotor Inspect the Pulse Ring for damage or misalignment Is the Pulse Ring okay Yes gt Replace the Camshaft Position Sensor Perform Powertrain Verification Test VER 5A No Repair or replace the Distributor Pulse Ring as necessary Perform Powertrain Verification Test VER 5A Start Engine ENGINE 3 0L V6 At PCM backprobe CMP Sensor Signal Circuit with Oscilloscope s voltage measure ment lead While observing the Oscilloscope pattern wiggle CMP Sensor Circuit from Sensor to PCM Were any signals missing when the wiggle test was conducted Yes Note where wiggling the Wires caused a missing CMP Sensor Signal Repair Camshaft and Crankshaft Wiring Harness as necessary Perform Powertrain Verification Test VER 5A gt GoTo 17 194 DRIVEABILITY P 1391 INTERMITTENT LOSS OF CMP OR CKP Continued APPLICABILITY Ignition Off ENGINE 3 0L V6 At the CKP Sensor backprobe the CKP Sensor Signal Circuit with the Oscilloscope s voltage measurement lead Start the Engine and observe the CKP Sensor voltage pattern on the Oscilloscope Are any Crankshaft Position Sensor Signals missing Yes gt GoTo 18 No gt GoTo 21 Ignition Off ENGINE 3 0L V6 Disconnect the CKP Sensor Connector Note Check connectors Clean repair as necessary Inspect all Terminals Is any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage p
33. 32 20YL RD SPEED CONTROL ON OFF SWITCH SENSE 4 30 20DB RD SPEED CONTROL BRAKE SWITCH OUTPUT BRAKE LAMP 5 1150 18WT TN BRAKE LAMP SWITCH OUTPUT SWITCH 6 2 18PK DB FUSED 333 CONNECTOR PINOUTS BLACK BRAKE SHIFT INTERLOCK SOLENOID CAMSHAFT POSITION N N SENSOR R YELLOW a 2 CLOCKSPRING C1 0 4 2 NATURAL ool 1 CLOCKSPRING C2 BRAKE SHIFT INTERLOCK SOLENOID EXCEPT BUILT UP EXPORT 2 WAY CAV CIRCUIT FUNCTION 1 K29 20WT PK RED BRAKE WARNING LAMP DRIVER 2 20RD WT FUSED IGNITION SWITCH OUTPUT ST RUN OFF CAMSHAFT POSITION SENSOR BLACK 3 WAY CAV CIRCUIT FUNCTION 1 K7 1808 8V SUPPLY 2 18BK LB SENSOR GROUND 3 K44 18TN YL CAMSHAFT POSITION SENSOR SIGNAL CLOCKSPRING C1 YELLOW 2 WAY CAV CIRCUIT FUNCTION 1 R43 18BK LB DRIVER AIRBAG LINE 1 2 R45 18DG LB DRIVER AIRBAG LINE 2 CLOCKSPRING C2 NATURAL 5 WAY CAV CIRCUIT FUNCTION 1 X3 20BK RD HORN RELAY CONTROL SENSE 2 X10 20RD WT RADIO RE RADIO MUX MOTE CONTROL 3 22 20BK LG SPEED CON GROUND TROL V37 20RD LG SPEED CONTROL SPEED CONTROL SWITCH SIGNAL X20 20RD BK RADIO RE MOTE CONTROL RADIO CONTROL MUX 334 BLACK 3 CLOCKSPRING BLACK 002 CLUTCH INTERLOCK SWITCH MTX
34. Attempt to start the engine if not already running ENGINE 3 3L V6 Does the engine start and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV Yes gt GoTo 26 No Return to symptom list and select symptoms for a no start condition Ignition Off ENGINE 3 3L V6 Using the schematic as a guide inspect the Wiring and Connectors and or ENGINE Were any problems found 3 8L V6 and or EN GINE 3 3L V6 FFV Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 118 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued APPLICABILITY Ignition On Engine Not Running ENGINE 3 0L V6 Using the DRB read Trouble Codes 15 the Global Good Trip displayed and equal to 0 Yes gt GoTo 28 gt GoTo 38 Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Turn ignition on Using a Voltmeter measure the 8 Volt Supply Circuit Is the voltage above 7 0 volts Yes gt GoTo 29 No Repair the open 8 Volt Supply Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CMP Sensor Ground Circuit from the CMP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes gt GoT
35. FUEL INJECTOR NO 1 3 3L 3 8L BLACK K 2 1 _ FUEL INJECTOR NO 2 2 0L 2 4L FUEL INJECTOR NO 2 3 3L 3 8L FUEL INJECTOR NO 3 3 3L 3 8L FUEL INJECTOR NO 1 3 3L 3 8L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 2 K11 18WT DB FUEL INJECTOR NO 1 DRIVER FUEL INJECTOR 2 2 OL 2 4L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 12 18TN WT FUEL INJECTOR NO 2 DRIVER A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT FUEL INJECTOR NO 2 3 3L 3 8L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 2 12 18TN WT FUEL INJECTOR NO 2 DRIVER FUEL INJECTOR NO 3 3 3L 3 8L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 2 K13 18YL WT FUEL INJECTOR NO 2 DRIVER 338 2 LAH FUEL INJECTOR NO 3 2 0L 2 4L FUEL INJECTOR NO 4 3 3L 3 8L BLACK 2 1 FUEL INJECTOR 4 2 02 41 FUEL INJECTOR NO 5 3 3L 3 8L BLACK CONNECTOR PINOUTS FUEL INJECTOR NO 3 2 0L 2 4L BLACK 2 WAY CAV CIRCUIT FUNCTION K13 18YL WT FUEL INJECTOR NO 3 DRIVER
36. Note Refer to any Technical Service Bulletins TSB that may apply Were any problems found Yes Repair wiring harness connectors as necessary Perform the Powertrain Verification Test VER 7A No Test Complete 312 Symptom List TRANSPONDER CYCLIC REDUNDANCY CHECK CRC FAILURE TRANSPONDER COMMUNICATION FAILURE TRANSPONDER ID MISMATCH TRANSPONDER RESPONSE MISMATCH Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be TRANSPONDER CYCLIC RE DUNDANCY CHECK CRC FAILURE When Monitored and Set Condition TRANSPONDER CYCLIC REDUNDANCY CHECK CRS FAILURE When Monitored At ignition ON and during Key Programming Mode Set Condition This condition exists when 5 consecutive transponder signal transmis sions are sent to the SKIM with the correct message format but with invalid data TRANSPONDER COMMINICATION FAILURE When Monitored At ignition ON and during Key Programming Mode Set Condition This condition exists when an invalid message format is received from the transponder after 5 consecutive transponder read attempts TRANSPONDER ID MISMATCH When Monitored At ignition ON and during Key Programming Mode Set Condition This condition exists when the transponder ID read by the SKIM does not match of those transponder D s stored in the SKIM s memory TRANSPONDER RESPONSE MISMATCH When Monitored At ignition ON and during Key Programming Mode Set
37. Perform Powertrain Verification Test VER 5A No gt GoTo 5 Ignition Off Disconnect Evap Purge Solenoid Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary With an Ohmmeter measure the Evap Purge Solenoid Control Circuit Is the resistance below 5 0 ohms Yes gt GoTo 6 Repair the open Purge Solenoid Control Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect Evap Purge Solenoid Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Evap Purge Solenoid Control Circuit at Connector to Ground Is the resistance below 5 0 ohms Yes Repair the Purge Solenoid Control Circuit short to Ground Perform Powertrain Verification Test VER 5A No gt GoTo 7 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A 144 DRIVEABILITY P 0443 EVAP PURGE SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition On Engine Not Running ALL With the DRB read codes With the DRB actuate the Evap Purge Solenoid Wiggle Wiring Harness from the Solenoid to PCM Does the
38. Yes gt GoTo 3 No GoTo 7 27 DRIVEABILITY P 0106 BAROMETRIC PRESSURE OUT OF RANGE Continued APPLICABILITY Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Ignition on with engine not running With the DRB read the MAP Sensor voltage 15 the voltage above 4 9 volts Yes Replace the MAP Sensor Perform Powertrain Verification Test VER 2A gt GoTo 4 Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance of the MAP Sensor Signal Circuit Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open MAP Sensor Signal Circuit between MAP Sensor and PCM Perform Powertrain Verification Test VER 2A If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the 5 Volt Supply Circuit Is the resistance below 5 0 ohms Yes gt GoT
39. ohmmeter measure the resistance from the 8 Volt Supply Circuit good ground Is the resistance below 5 0 ohms Yes Repair the 8 V Supply Circuit for a short to ground Note Check VSS on 3 Speed Transmission Perform Powertrain Verification Test VER 2A GoTo 18 If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A 112 DRIVEABILITY Symptom P 0340 NO CAM SIGNAL AT PCM When Monitored and Set Condition P 0340 NO CAM SIGNAL AT PCM When Monitored During engine cranking after 64 crank position signals Set Condition If no signal from the cam position sensor is present with crank signal the code will set POSSIBLE CAUSES ENGINE DOES NOT START 8 VOLT SUPPLY CIRCUIT OPEN CAMSHAFT SPROCKET OBSERVABLE DEFECT CMP SENSOR GROUND CIRCUIT OPEN CMP SENSOR WIRING HARNESS OBSERVABLE DEFECT DISTRIBUTOR AND PULSE RING OBSERVABLE DEFECT CAMSHAFT TARGET MAGNET OBSERVABLE DEFECT CMP SENSOR DEFECTIVE CMP SENSOR CONNECTOR OBSERVABLE DEFECT PCM DEFECTIVE CMP SENSOR SIGNAL CIRCUIT OPEN CMP SENSOR SIGNAL CIRCUIT SHORTED TO 8 VOLT SUPPLY CMP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND CMP SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND ACTION APPLICABILITY Ignition On Engine Not Running ENGINE 2 0L Using the DRB read Trouble Codes and 2 4L 15 the Global Good Trip displayed and equ
40. 15 the Line kinked or restricted Yes Release the Fuel Pressure Repair the Fuel Line as necessary Perform Powertrain Verification Test VER 2A No gt GoTo 9 Ignition Off Warning The Fuel System must be opened and may be under high pressure Release the fuel pressure Connect Fuel Pressure Adapter and Gauge to Supply Line between ilter Turn ignition on With the DRB actuate the Fuel System test 15 the Fuel Pressure at least 5 psi higher than previously recorded pressure Yes Release the Fuel Pressure Replace the Fuel Filter Perform Powertrain Verification Test VER 2A GoTo 10 Ignition Off Warning The Fuel System must be opened and may be under high pressure Release the fuel pressure Connect Fuel Pressure Adapter and Gauge to Supply Line between Tank F ilter Turn ignition on With the DRB actuate the Fuel System test 15 Fuel Pressure at least 5 psi higher than previously recorded pressure Yes gt Test Complete Release the Fuel Pressure Replace the Fuel Pump and Regulator Assembly Perform Powertrain Verification Test VER 2A No Ignition Off Warning The Fuel System must be opened and may be under high pressure Relieve the Fuel Pressure Tee in Fuel Pressure Gauge into the Fuel Supply Hose using Tool 6433 Turn ignition on With the actuate the ASD Fuel System test 15 the Fuel Pressure between 43 and 53 psi Yes gt GoTo 12 No gt GoTo 15
41. 4 Turn the Speed Control ON 5 Press and release the Set switch Verify that the speed control engages 6 With the Speed Control engaged A Press and hold the ACCEL switch Verify that the speed increases B Press and hold the SET or DECEL switch Verify that the vehicle speed decreases C Press and release the CANCEL switch Verify that the Speed Control disengages D Allow the vehicle speed to drop below 25 MPH Press and release the RESUME switch Verify that the previously set vehicle speed is attained E Using caution press and release the brake pedal Verify that the Speed Control disengages Increase vehicle speed by at least 10 MPH Press and release the SET switch Verify the Speed Control maintains this speed Press and release the ON OFF switch turn the Speed Control OF Verify that the Speed Control disengages If any or all of these functions are not operating properly refer to the symptom list for the appropriate diagnostic testing procedures 7 With the DRBIII Read DTC s If the DTC returns or any other symptom or DTC is present refer to the symptom list for further diagnostic testing procedures Check for any Technical Service Bulletins that may apply 8 there are no 5 present and all components are functioning properly the repair is complete 319 VERIFICATION TESTS Verification Tests Continued VERIFICATION TEST VER 5A OBDII Road Test Verification Use this test to verify th
42. AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH Turn key on Use a Voltmeter in the following step Using a Voltmeter measure the Fused Ignition Switch Output Circuit at Solenoid Connector Is the voltage above 10 0 volts Yes gt GoTo 5 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off TRANSMISSION Disconnect the TCC Solenoid connector AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH With an Ohmmeter measure across the Solenoid for resistance Was resistance between 30 0 and 50 0 ohms Yes gt GoTo 6 No Replace TCC Solenoid Perform Powertrain Verification Test VER 5A Drive Vehicle TRANSMISSION Maintain 50 MPH per DRB Wait 10 seconds in lockup Record Engine RPM AUTOMATIC Was engine RPM 2200 50 RPM 3 SPD 31TH Yes gt GoTo 7 No Inspect Differential Output Shaft or Gear Box Refer to service instructions for proper diagnosis Perform Powertrain Verification Test VER 5A Ignition Off TRANSMISSION Remove VSS AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH Inspect sensor and gear for damage also improper wheel size Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 303 TRANSMISSION Symptom P 0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT E When Monitored an
43. BLOCK F IGN SWITCH POSITIVE TEMPERATURE COEFFICIENT TO RAD FAN FUSE IN 80ae835b 5 H E M 5 NOTES 358 gt
44. CHECKING O2S HEATER CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING ENGINE ME CHANICAL SYSTEMS CHECKING EVAP EMISSION SYSTEM CHECKING EGR SYSTEM CHECKING IAT SENSOR CHECKING PNP SWITCH 3 4 USING THE DRBIII Refer to the DRBIII user s guide for instructions and assistance with reading trouble codes erasing trouble codes and other DRBII functions 3 5 DRB ERROR MESSAGES AND BLANK SCREEN Under normal operation the DRBIII will dis play one of only two error messages User Requested WARM Boot Requested COLD Boot This is asample of such an error message display ver 2 14 date 26 J ul93 file key_itf cc date J ul 26 1993 line 548 err 1 User Requested COLD Boot or User Press MORE to switch between this display and the application screen Press F4 when done noting information 3 5 1 DRB DOES POWER UP If the 5 do not light or no sound is emitted at start up check for loose cable connections or a bad cable Check the vehicle battery voltage data link connector cavity 16 A minimum of 11 volts is required to adequately power the DRBIII If all connections are proper between the DRBIII and vehicle or other devices and the vehicle battery is fully charged an inoperative DRBIII may be the result of a faulty cable or vehicle wiring For a blank screen refer to the appropriate body diagnostics manual GENERAL INFORMATION 3 5 2 DISPLAY IS NOT
45. Disconnect Ignition Coil Secondary Cable 4 from the Ignition Coil Terminal 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Disconnect the Coil Secondary Cable at Spark Plug 4 Note Check connectors Clean repair as necessary With Ohmmeter test the resistance of Ignition Coil Secondary Cable 4 15 the resistance below 15 K ohms Yes gt GoTo 21 No Replace Ignition Coil Secondary Cable 4 Perform Powertrain Verification Test VER 1A 292 STARTING CHECKING THE SECONDARY IGNITION SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 2 0L Disconnect the Ignition Coil Secondary Cable at Spark Plug 1 and 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Disconnect the Ignition Coil Secondary Cable at Spark Plug 4 Note Check connectors Clean repair as necessary Note Either Spark Plug 1 or 4 will not produce a good spark Remove Spark Plugs 1 and 4 Inspect and determine which Spark Plug needs replacement View repair options Repair Replace the Spark Plug that will not produce a spark Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the Ignition Coil Connector and 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Inspect Terminals Is any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout or miswiring Perform Powertrain Verification T
46. Does the Switch show Park Yes gt GoTo 10 No Repair Park Neutral Switch Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary Werning The Engine may be cranked in the next step Keep away from moving parts Warning The engine may be cranked in the next step Keep away from moving parts Briefly connect a jumper wire between Starter Relay Output and Fused Circuits Did the Starter Solenoid click when the jumper wire was connected Yes gt GoTo 11 gt GoTo 15 Ignition Off Check the Battery Cables for high resistance Use Service Manual procedure Did either Battery Circuit have a voltage drop greater than 0 2 volt Yes Repair the Battery Circuit for high resistance Perform Powertrain Verification Test VER 1A GoTo 12 Ignition Off Attempt to manually rotate the Crankshaft 360 degrees 15 the Crankshaft able to rotate 360 degrees Yes gt GoTo 13 No Repair the Engine mechanical problem as necessary Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary With a Voltmeter measure the Fused B Circuit Is the voltage above 11 6 volts Yes gt GoTo 14 No Repair open Fused Circuit check Ignition Switch Fuse in PDC Perform Powertrain Verification Test VER 1A
47. Ignition Off Note Make sure the Gear Lever is in neutral and the Park Brakes engaged Start the engine Monitor the Fuel Pressure Gauge in the next step While monitoring the pressure momentarily snap Throttle wide open raising RPM to above 3000 Did the fuel pressure drop below 35 psi at all Yes gt GoTo 13 No Test Complete 239 APPLICABILITY ENGINE 2 4L 1 4 DOHC and or EN GINE 3 3L V6 and or ENGINE 3 3L V6 FFV and or ENGINE 3 8L V6 ENGINE 2 4L 1 4 DOHC and or EN GINE 3 3L V6 and or ENGINE 3 3L V6 FFV and or ENGINE 3 8L V6 ENGINE 2 4L 1 4 DOHC and or EN GINE 3 3L V6 and or ENGINE 3 3L V6 FFV and or ENGINE 3 8L V6 ENGINE 3 0L V6 DRIVEABILITY CHECKING FUEL DELIVERY Continued APPLICABILITY Ignition Off Inspect the Chassis Fuel Supply Line to the engine for a kink or restriction 15 the line kinked or restricted Yes Release the fuel pressure Repair the Fuel Line as necessary Perform Powertrain Verification Test VER 2A GoTo 14 All Ignition Off All Warning The Fuel System must be opened and may be under high pressure Release the fuel pressure Remove the Fuel Pressure Gauge from the Fuel Rail Adjust a shop air hose to 40 psi Remove the Fuel Filter Using shop air inspect the Fuel Filter passage by attempting to blow air through inlet 15 the Fuel Filter restricted Yes Replace the Fuel Filter Perform Powertrain Verif
48. Is the Air Conditioning Clutch Relay clicking Yes gt GoTo 2 gt GoTo 4 Ignition On Engine Not Running Actuate the Air Conditioning Clutch Relay Wiggle the Wiring Harness from the Relay to the PCM Did the wiggling interrupt the clicking Yes gt Repair as necessary where wiggling caused the clicking to be interrupted Perform Powertrain Verification Test VER 2A GoTo 3 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 170 DRIVEABILITY P 0645 A C CLUTCH RELAY CIRCUIT Continued ACTION APPLICABILITY Ignition Off Remove the Air Conditioning Clutch Relay Note Check connectors Clean repair as necessary Using a Voltmeter measure the Fused Ignition Switch Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 5 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 2A Ignition Off Remove the Air Conditioning Clutch Relay Note Check connectors Clean repair as necessary Using ohmmeter measure the resistance between terminals 85 and A 86 of the Air Conditioning Clutch Relay 15 the resistance below between 50 to 90 ohms Yes gt GoTo 6 No Replace theAir Conditioning Clutch Relay Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect t
49. Perform Powertrain Verification Test VER 1A No GoTo 29 If there are no potential causes remaining the Fuel Pump Module 15 assumed to be ENGINE 2 0L defective 2 4L 1 4 DOHC View repair options and or ENGINE 3 3L V6 FFV and or ENGINE 3 3L V6 and or ENGINE 3 8L V6 Repair Replace Fuel Pump Module Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the Fuel Pump Harness Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE Caution It is critical that the Fuel Pump Connector has a clean and tight 3 3L V6 FFV and or connection ENGINE 3 3L V6 With an Ohmmeter measure the Fuel Pump Ground Circuit and or ENGINE Is the resistance below 5 0 ohms 3 8L V6 Yes gt GoTo 31 No Repair the open Fuel Pump Ground Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the Fuel Pump Relay 2 4L 1 4 DOHC Check connectors Clean repair as necessary and or ENGINE Ignition On Engine Not Running 3 3L V6 FFV and or With a Voltmeter measure the Fuel Pump Relay Fused B Circuit ENGINE 3 3L V6 15 the voltage above 10 0 volts and or ENGINE 3 8L V6 Yes gt GoTo 32 No the open Fuel Pump Relay Fused B Circuit Perform Powertrain Verification Test VER 1A 285 STARTING CHECKING THE FUEL SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 2 0L Disconn
50. Perform Powertrain Verification Test VER 5A GoTo 19 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 20 Check the freeze frame data to determine the conditions when code was set Attempt duplication of freeze frame conditions for added diagnostics If there are no other possible causes remaining there is assumed to be an intermit tent problem with a Wiring Harness Connector or Wire View repair options Repair Visually inspect related Wire Harness Connectors and Harnesses Look for broken bent pushed out or corroded terminals and for chafed pierced or partiallly broken wire respectively Refer to any hotlines or technical service bulletins that apply 147 DRIVEABILITY Symptom P 0460 FUEL LEVEL UNIT NO CHANGE OVER MILES POSSIBLE CAUSES FUEL LEVEL SENSOR WIRING HARNESS OBSERVABLE DEFECT FUEL TANK OBSTRUCTED TEST COMPLETE ACTION APPLICABILITY Ignition On All With the DRB read the Fuel Level Sensor voltage and make a note of the voltage Add two gallons of fuel to the Fuel Tank With the DRB read the Fuel Level Sensor voltage Did the Fuel Level Sensor voltage decrease by at least 0 2 volts Yes gt GoTo 2 Check for an obstruction in the Fuel Tank If ok replace Fuel Level Sensor Perform Powertrain Verification Test VER 2A
51. Repair Replace the CKP Sensor Perform Verification Test VER 2A 199 DRIVEABILITY Symptom P 1486 EVAP LEAK MONITOR PINCHED HOSE FOUND When Monitored and Set Condition P 1486 EVAP LEAK MONITOR PINCHED HOSE FOUND When Monitored Amb temp bet 4 deg 40deg amp 32 deg 90deg amp coolant w in 12 deg C 10deg F of amb If PCM suspects pinch no fault until runs evap purge flow mon Purge flow monitored w eng temp gt 76 deg 170deg engine closed loop idle 2 min no low fuel MAP lt 15 7 in merc amp baro alt lt 8000 ft Set Condition LDP must pass stricter evap system test first No air flow through the evaporative system is detected by the evap monitor POSSIBLE CAUSES FUEL TANK TO EVAP CANISTER HOSE PINCHED LDP PRESSURE HOSE BLOCKAGE PURGE SOLENOID TO EVAP CANISTER HOSE PINCHED LEAK DETECTION PUMP BLOCKAGE EVAPORATIVE CANISTER BLOCKAGE LDP SIDE EVAPORATIVE CANISTER BLOCKAGE SOLENOID SIDE EVAP LEAK MONITOR PINCHED HOSE DOES NOT REOCCUR APPLICABILITY NOTE Replacing the Powertrain Control Module will not correct this All problem With the DRB read the DTCs 15 the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 3 No gt GoTo 2 At this time the Evap Leak Monitor Pinched Hose Found does not exist or is an intermittent problem With the DRB read the FREEZE FRAME With this screen attempt to duplicate the condition that has set this fault W
52. Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 35 DRIVEABILITY Symptom 0113 INTAKE AIR TEMPERATURE SENSOR VOLT HIGH When Monitored and Set Condition P 0113 INTAKE AIR TEMPERATURE SENSOR VOLT HIGH When Monitored With the ignition on the engine running Set Condition Theintakeair sensor circuit voltage at PCM cavity 37 goes above 4 9 volts POSSIBLE CAUSES IAT SENSOR DEFECTIVE IAT SENSOR SIGNAL CIRCUIT OPEN SENSOR GROUND CIRCUIT OPEN IAT SENSOR WIRING HARNESS INTERMITTENT DEFECT IAT SENSOR WIRING HARNESS OBSERVABLE DEFECT PCM DEF IAT SENSOR ACTION APPLICABILITY Ignition on with engine not running All Read the IAT Sensor voltage 15 the Sensor voltage above 4 5 volts Yes gt GoTo 2 gt GoTo 6 Ignition Off Disconnect the IAT Sensor Check Connectors clean repair as necessary Ignition on with engine not running Connect the jumper wire between the Signal and Sensor Ground Circuits With the read IAT Sensor voltage 15 the voltage below 1 0 volt Yes Replace the Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 3 Ignition Off Disconnect the IAT Sensor Electrical Connector Note Check connectors Clean repair as necessary Connect a jumper wire between
53. With the DRB actuate Fuel System Is the fuel pressure at least 2 psi higher than the previous reading Yes Replace the Fuel Filter Perform Powertrain Verification Test VER 1A No gt GoTo 27 Ignition Off ENGINE 2 0L Warning The Fuel System must be opened and be under high 2 4L 1 4 DOHC Release Fuel pressure and or ENGINE Remove the Fuel Pump Module 3 3L V6 FFV and or Inspect the Fuel Pump Inlet Strainer ENGINE 3 3L V6 Is the Inlet Strainer plugged and or ENGINE 3 8L V6 Yes Replace the Fue Inlet Strainer Perform Powertrain Verification Test VER 1A No GoTo 28 284 STARTING CHECKING THE FUEL SYSTEM Continued ACTION APPLICABILITY Record the Fuel Pressure Gauge reading ENGINE 2 0L Ignition Key Off 2 4L 1 4 DOHC Warning The Fuel System must be opened and may be under high pressure and or ENGINE Release Fuel pressure 3 3L V6 FFV and or Remove the Fuel Pressure Gauge ENGINE 3 3L V6 Install adapter 6631 between Fuel Filter Outlet and Chassis Fuel Supply Tube and or ENGINE Connect Fuel Pressure Gauge to adapter 6631 3 8L V6 Ignition On Engine Not Running With DRB actuate the ASD Fuel System Record the Fuel Pressure Gauge reading Compare this reading with the previous reading 15 the fuel pressure at least 2 psi higher than the previous reading Yes Repair restriction in Chassis Fuel Supply Line between Fuel Filter and Fuel Rail
54. Yes Repair the restriction or leak in the vacuum lineto EGR Solenoid Perform Verification Test VER 2A No gt GoTo 11 229 DRIVEABILITY CHECKING EGR SYSTEM Continued ACTION APPLICABILITY Ignition Off All If there are no potential causes remaining the vacuum nipple at the throttle body is assumed to be plugged View repair options Repair Repair the plugged Vacuum Nipple at the Throttle Body Perform Verification Test VER 2A 230 DRIVEABILITY Symptom CHECKING ENGINE VACUUM ACTION APPLICABILITY Ignition Off All Connect a Vacuum Gauge to a Vacuum Source on the Engine Start the Engine and allow it to idle Note The normal vacuum reading will vary according to the altitude While monitoring the vacuum gauge snap the throttle open a few times Refer to vacuum gauge specifications in support material Observe the Vacuum Gauge reading at idle 15 the Vacuum Gauge reading between 13 inches 22 inches steady Yes Test Complete No Refer to symptom CHECKING THE ENGINE MECHANICAL SYSTEMS in the DRIVEABILITY category 231 DRIVEABILITY Symptom CHECKING EVAPORATIVE EMISSION SYSTEM POSSIBLE CAUSES EVAP PURGE SOLENOID DEFECTIVE EVAP PURGE SOLENOID DEFECTIVE EVAPORATIVE CANISTER DEFECTIVE EVAPORATIVE EMISSION VACUUM HOSE OBSERVABLE DEFECT VACUUM LINE OBSERVABLE DEFECT VACUUM LINE PLUGGED VACUUM LINE PLUGGED TEST PASSED ACTION APPLICABILITY Ignition Off N
55. enabling conditions and allow the applicable monitor to run 4 If the DTC resets or the OBDII monitor fails after running or if any other symptom or DTC is present return to the symptom list and perform the appropriate diagnostic testing procedurs Refer to any Technical Service Bulletins that may apply 5 If the monitor runs and the Good Trip Counter changes to one or more the condition is no longer present 6 If there no DTCs and all components are functioning properly the repair is complete Powertrain Verification Test VER 6A APPLICABILITY LDP Monitor Verification All Use this test to verify that the LDP monitor symptom has been repaired and that the vehicle can be returned to the customer NOTE If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and Transponder ignition key 1 Inspect the vehicle to ensure that all components are related to the repair are connected properly 2 If any other DTC is present refer to the symptom list for futher diagnostic testing procedures 3 With the DRBIII perform the LDP Monitor Test Follow the instructions on the DRBIII screen 4 If the DTC r
56. gt Replace theA C Pressure Sensor Perform Powertrain Verification Test VER 2A gt GoTo 4 Ignition Off Disconnect the Powertrain Control Module Disconnect the A C Pressure Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter test the resistance between the A C Pressure Sensor Signal Circuit and Sensor Ground Circuit 15 the resistance below 5 0 ohms Yes Repair the Sensor Signal Circuit shorted to the Sensor Ground Circuit Perform Powertrain Verification Test VER 2A GoTo 5 Using an Ohmmeter measure the A C Pressure Sensor Signal Circuit to ground 15 the resistance below 5 0 ohms Yes Repair the Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 2A No GoTo 6 Ignition off If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A Ignition Off Using the schematic as a guide inspect the wiring and connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No GoTo 8 Ignition Off All Disconnect the Powertrain Control Module Disconnect the A C Pressure Sensor Connector Note Check connectors Clean repair as necessary 218 DRIVEABILITY P 1599 A C PRESSURE SENSOR VOLTS TOO LOW Continued APPLICABILITY All A
57. 0 100 P 0304 CYLINDER 4 MIS FIRE 2222552 5 lt 100 05 a e a aa dew ee ee 104 P 0306 CYLINDER 6 eter 104 0320 NO CRANK REFERENCE SIGNAL 108 0340 CAM SIGNAL PCM 113 0351 IGNITION COIL 1 PRIMARY 2 55 55 122 0352 IGNITION COIL 2 PRIMARY 125 P 0353 IGNITION COIL 3 PRIMARY 128 Peau EGR SYSTEM FAILURE 131 P 0403 EGR SOLENOID 133 0420 1 1 CATALYTIC CONVERTER 136 0441 PURGE FLOW MONITOR FAILURE 138 0442 EVAP LEAK MONITOR SMALL LEAK 140 P 0455 EVAP LEAK MONITOR LARGE LEAK DETECTED 140 TABLE OF CONTENTS Continued P 0443 EVAP PURGE SOLENOID CIRCUIT 143 P 0460 FUEL LEVEL UNIT NO CHANGE OVER 5 148 P 0462 FUEL LEVEL SENDING UNIT VOLTS TOO 149 P 0463 FUEL LEVEL SENDING UNIT VOLTS TOO
58. 18WT BK FUSED IGNITION SWITCH OUTPUT ST RUN 3 K106 18WT DG LEAK DETECTION PUMP SOLENOID CONTROL 4 K107 18YL BK LEAK DETECTION PUMP SWITCH SENSE 342 CONNECTOR PINOUTS BLACK ee B A MANIFOLD ABSOLUTE PRESSURE SENSOR 2 4L 3 3L 3 8L BLACK 3 WAY CAV CIRCUIT FUNCTION K4 18BK LB SENSOR GROUND Ke 18VT WT 5V SUPPLY MANIFOLD ABSOLUTE Ki 18DG RD MAP SENSOR SIGNAL PRESSURE SENSOR 2 4L 3 3L 3 8L OUTPUT SPEED SENSOR GRAY 2 WAY CAV CIRCUIT FUNCTION 1 13 18DB BK SPEED SENSOR GROUND 2 14 18LGWT OUTPUT SPEED SENSOR SIGNAL OUTPUT SPEED SENSOR R P OXYGEN SENSOR SENSOR SIDE CAV CIRCUIT FUNCTION N 1 GROUND 2 AUTOMATIC SHUT DOWN RELAY OUTPUT U 3 OXYGEN SENSOR GROUND 4 OXYGEN SENSOR SIGNAL 5 OXYGEN SENSOR CONNECTOR COMPONENT SIDE 1 2 OXYGEN SENSOR 1 1 UPSTREAM GRAY 4 WAY CAV CIRCUIT FUNCTION 1 71 18BK GROUND 3 EJ 2 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT K127 18BK OR OXYGEN SENSOR GROUND OXYGEN SENSOR 4 18BK DG OXYGEN SENSOR 1 1 SIGNAL 1 1 UPSTREAM 343 CONNECTOR PINOUTS BLACK 1 2 3 4 OXYGEN SENSOR 1 2 DOWNSTREAM BLACK 1 600 PARK NEUTRAL POSITION SWITCH ATX R le 2 OXYGEN SENSO
59. 41TE and or TRANSMIS SION AUTO STICK Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition Off TRANSMISSION Disconnect the PCM Connector AUTOMATIC Note Check connectors Clean repair as necessary 4 SPD 41TE Using Ohmmeter measure between the Park N eutral Switch Sense Circuit at the and or TRANSMIS PCM Connector and Ground SION AUTO While moving Gear Selector between Park and Reverse watch Ohmmeter display STICK Did the display switch from below 5 0 ohms to above 5 0 ohms Yes Replace the Perform Powertrain Verification Test VER 5A gt GoTo 10 Ignition Off TRANSMISSION Disconnect the PCM Connector AUTOMATIC Note Check connectors Clean repair as necessary 4 SPD 41 Using an Ohmmeter measure between the Park N eutral Switch Sense Circuit at the and or TRANSMIS PCM Connector and Ground SION AUTO While moving gear selector between Park and Reverse watch Ohmmeter display STICK Did the display stay below 5 0 ohms at all times Yes Repair the P N Switch Sense Circuit for a short to Ground Perform Powertrain Verification Test VER 5A No gt GoTo 11 Ignition Off TRANSMISSION Disconnect the PCM AUTOMATIC Disconnect the Transmission Range Sensor TRS Connector 4 SPD 41TE Note Check connectors Clean repair as necessary and or TRANSMIS With an Ohmmeter measure the Park N eutral Switch Sense Circuit from
60. 5 0 ohms Yes gt GoTo 7 No Repair theASD Relay Output Circuit open circuit Perform Powertrain Verification Test VER 3A 22 CHARGING P 1682 CHARGING SYSTEM VOLTAGE TOO LOW Continued ACTION APPLICABILITY Ignition Off All Note Battery must be fully charged Note Generator belt tension and condition must be checked before continu ing Disconnect the Generator Field Connector Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the Generator Field Driver Circuit from PCM Connector to Generator Field Connector Is the resistance below 5 0 ohms Yes gt GoTo 8 No Repair the open Driver Circuit Perform Powertrain Verification Test VER 3A If there are no potential causes remaining the Generator is assumed to be defective View repair options Repair Repair or replace the Generator as necessary Perform Powertrain Verification Test VER 3A 23 CHARGING Symptom CHECKING CHARGING SYSTEM OPERATION WITH NO DTC S POSSIBLE CAUSES TROUBLE CODES PRESENT VOLTAGE DIFFERENCE gt 1 VOLT GENERATOR FIELD TERMINAL INTERMITTENT DEFECTIVE GENERATOR GROUND CIRCUIT HIGH RESISTANCE B CIRCUIT HIGH RESISTANCE 0 4 VOLT B CIRCUIT HIGH RESISTANCE 1 VOLT PCM DEFECTIVE CHARGING SYSTEM NO CODE GENERATOR BELT VISIBLY DEFECTIVE TROUBLE CODES PRESENT 1600 RPM APPLICABILITY Note Battery condition must
61. 87 FUEL HEATER RELAY DIESEL CAV CIRCUIT FUNCTION 20 INTERNAL FUSED B 85 71 20BK GROUND 86 INTERNAL FUSED IGNITION SWITCH OUTPUT ST RUN 87 A141 16DG WT FUEL HEATER RELAY OUTPUT 87 FUEL PUMP RELAY GAS CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 K31 18BR FUEL PUMP RELAY CONTROL 86 F87 18WT BK FUSED IGNITION SWITCH OUTPUT ST RUN 87 141 16DG WT FUEL PUMP RELAY OUTPUT 87 HIGH BEAM RELAY CAV CIRCUIT FUNCTION 30 AO 6RD B 85 L324 20WT LG HIGH BEAM RELAY CONTROL 86 AO 6RD B 87 INTERNAL HIGH BEAM RELAY OUTPUT 87A HORN RELAY CAV CIRCUIT FUNCTION 20 INTERNAL FUSED B 85 4 18GY OR RHD DIE HORN RELAY CONTROL SEL 85 4 20GY OR EXCEPT RHD HORN RELAY CONTROL DIESEL 86 AO 6RD BE 87 18DG RD HORN RELAY OUTPUT 87A 347 R 4 2 R 4 2 CONNECTOR PINOUTS LOW BEAM RELAY CAV CIRCUIT FUNCTION 30 AO 6RD BG 85 1193 200R WT LOW BEAM RELAY CONTROL CHRYSLER 85 194 200R WT EXCEPT LOW BEAM RELAY CONTROL CHRYSLER 86 AO 6RD B 87 INTERNAL LOW BEAM RELAY OUTPUT 87 PARK LAMP RELAY CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 197 18VT PARK LAMP RELAY CONTROL 86 INTERNAL FUSED B 87 17 12BK YL PARK LAMP RELAY OUTPUT 87A T
62. ACTION APPLICABILITY Ignition Off Disconnect the U pstream or Downstream O2 Sensor Connector that the voltage is below 0 10 volts Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using Ohmmeter measure the resistance between the O2 Sensor Signal Circuit and a good ground Is the resistance below 5 0 ohms Yes Repair the 02 Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 2A No gt GoTo 6 If there are no potential causes remaining the Upstream or Downstream O2 Sensor 15 assumed to be defective View repair options Repair Replace the Upstream or Downstream O2 Sensor that was below 0 10 volts Perform Powertrain Verification Test VER 2A Engine Running All Allow the Engine to idle Inspect the Engine for any abnormal vacuum conditions Are there any abnormal vacuum conditions Yes Repair abnormal Engine Vacuum condition as required Perform Powertrain Verification Test VER 2A No GoTo 8 Engine Running With the DRB reset the Adaptive Fuel Memory Note The engine must be running and at normal operating temperature Note The Downstream O2 Sensor should switch slower than the Upstream O2 Sensor With the DRB read the O2 Sensor voltages for 10 seconds or more Are O2 Sensor voltages switching normally Yes gt Test Complete No Refer to symptom CHE
63. ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Release Fuel pressure Remove the Fuel Pump Module Inspect the Fuel Pump Inlet Strainer Is the Inlet Strainer plugged Yes Replace the Fuel Inlet Strainer Perform Powertrain Verification Test VER 1A No gt GoTo 11 Record the Fuel Pressure Gauge reading ENGINE 3 0L V6 Ignition key off Werning The Fuel System must be opened and may be under high pressure Release Fuel pressure Remove the Fuel Pressure Gauge Remove Fuel Pressure Gauge Adapter 6433 and reconnect Fuel Line to Fuel Rail Install adapter 6631 between Fuel Filter Outlet and Chassis Fuel Supply Tube Connect Fuel Pressure Gauge to adapter 6631 Ignition On Engine Not Running With DRB actuate the ASD Fuel System Record the Fuel Pressure Gauge reading Compare this reading with the previous reading 15 the fuel pressure at least 2 psi higher than the previous reading Yes Repair restriction in Chassis Fuel Supply Line between Fuel Filter and Fuel Rail Perform Powertrain Verification Test VER 1A GoTo 12 If there are no potential causes remaining the Fuel Pump Module 15 assumed to be ENGINE 3 0L V6 defective View repair options Repair Replace Fuel Pump Module Perform Powertrain Verification Test VER 1A Ignition On Engine Not Running ENGINE 3 0L V6 With DRB read Throttle Position Sensor voltage 15
64. CLOSED LOOP TEMP NOT REACHED Continued ACTION APPLICABILITY Ignition off Disconnect PCM Note Check Connectors clean repair as necessary Is any Terminal damaged pushed out or miswired Yes Clean or repair connector as necessary Perform Powertrain Verification Test VER 5A No gt GoTo 5 Ignition off All Disconnect the ECT Sensor Connector Note Check connectors Clean repair as necessary Using an ohmmeter measure the resistance of the ECT Sensor Is the resistance below 11 0 k ohms Yes gt GoTo 6 No Replace the ECT Sensor Perform Powertrain Verification Test VER 5A Ignition off Note This test procedure will be invalid if the Thermostat is stuck open Is the Thermostat operating correctly Yes gt GoTo 7 No Replace the Thermostat Perform Powertrain Verification Test VER 5A Ignition off If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 52 DRIVEABILITY Symptom P 0131 1 1 O2 SENSOR VOLTAGE SHORTED TO GROUND _ When Monitored and Set Condition P 0131 1 1 2 SENSOR VOLTAGE SHORTED TO GROUND When Monitored With theignition key off after the O2 Sensor cools down and after the next key on provided that it is a cold start coolant temperature less than 38 degrees C
65. Circuit from O2 Sensor Connector back to splice Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the H eater Ground Circuit and a good ground Is the resistance below 5 0 ohms Yes gt GoTo 8 No Repair the open Heater Ground Circuit to the Downstream 02 Sensor Perform Powertrain Verification Test VER 2A If there are potential causes remaining the Downstream O2 Sensor is assumed to be defective View repair options Repair Replace the Downstream O2 Sensor Perform Powertrain Verification Test VER 2A 248 DRIVEABILITY Symptom CHECKING PARK NEUTRAL POSITION SWITCH POSSIBLE CAUSES DISPLAY SHOWS P N AND D R TRANSMISSION RANGE SENSOR DEFECTIVE PARK NEUTRAL POSITION SWITCH SENSE CIRCUIT OPEN PARK NEUTRAL SWITCH SENSE CIRCUIT SHORT TO GROUND PCM DEF P N POSN SW ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read Park Neutral Position Switch state While moving the gear selector through all gear positions watch DRB display Does the display show Yes gt Park Neutral Position Switch normal test pass gt GoTo 2 Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Measure the resistance between the Park Neutral
66. Connector Note Check connectors Clean repair as necessary With the DRB in voltmeter mode probe the 5 volt supply circuit voltage at the MAP Sensor Connector Wiggle all connectors and wiring to all sensors MAP A C PRESS TPS While you wiggle the connectors and wiring to all sensors monitor the 5 0 volt supply circuit voltage Was there any voltage change Yes Repair the harness or connector that caused the voltage change Perform Powertrain Verification Test VER 2A Ignition On Engine Not Running All Disconnect the MAP Sensor Connector Note Check connectors Clean repair as necessary With the voltmeter probe the 5 Volt Supply Ckt at the MAP Sensor Connector No Test Complete 213 DRIVEABILITY Symptom P 1598 A C PRESSURE SENSOR VOLTS TOO HIGH When Monitored and Set Condition P 1598 A C PRESSURE SENSOR VOLTS TOO HIGH When Monitored With theignition on the engine running the A C relay energized Set Condition A C pressure sensor signal at PCM cavity 42 goes above 4 9 volts POSSIBLE CAUSES AIR CONDITIONING PRESSURE SENSOR GROUND CIRCUIT OPEN AIR CONDITIONING PRESSURE SENSOR DEFECTIVE A C PRESS SENSOR CONN AND WIRING HARN INTER DAMAGE A C PRESSURE SENSOR CONNECTOR AND HARNESS OBSERVABLE DEFECT A C PRESSURE SENSOR SIGNAL CIRCUIT OPEN A C PRESSURE SENSOR SIGNAL SHORT TO VOLTAGE PCM DEFECTIVE ACTION APPLICABILITY Ignition On Engine Not Running All With the read
67. D R Yes gt GoTo 6 No Refer to symptom CHECKING PARK NEUTRAL POS SWITCH in the SPEED CONTROL category Note Check connectors Clean repair as necessary Turn the Ignition on and the S C on Using a Voltmeter measure voltage of the S C Brake Switch Output Ckt at Servo Conn 15 the voltage above 10 volts Yes gt GoTo 7 No gt GoTo 14 Ignition Off Start engine allow to idle 1 minute Turn Engine off Ignition on With the DRB actuate the Speed Control Servo Solenoids Does the Throttle open and close Yes Refer tosymptom SPEED CONTROL DENIED MESSAGE in the SPEED CONTROL category No GoTo 8 Ignition Off Inspect the Speed Control Throttle Cable 15 the Cable disconnected or damaged Yes gt Repair as necessary Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Speed Control Servo Connector No GoTo 9 267 SPEED CONTROL CHECKING SPEED CONTROL OPERATION Continued ACTION APPLICABILITY Ignition Off Disconnect the Vacuum Supply to the Speed Control Servo Attach a Vacuum Gauge to the disconnected hose Start engine Does the Vacuum Gauge read Manifold Vacuum Yes gt GoTo 10 No Repair the Vacuum Supply for a leak or restriction Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Speed Control Servo Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Ground Circuit from
68. DEF OR TCC SOL STUCK TRANSMISSION FLUID DIRTY OR LEVEL LOW VEHICLE CONFIGURATION NON STANDARD ACTION APPLICABILITY Ignition On Engine Not Running TRANSMISSION With the DRB read codes AUTOMATIC Is the Global Good Trip displayed and equal to 0 3 SPD 31TH Yes gt GoTo 2 No Test Complete Ignition Off TRANSMISSION At the Cooler In port put a 0 to 300 PSI gauge using T Ensure line is long AUTOMATIC enough to reach in driver s side of vehicle so gauge be monitored while driving 3 SPD 31TH Road test vehicle Gear select in drive While monitoring DRB achieve 50 MPH While doing this notice the gauge will read around 15 PSI until lockup is achieved in 3rd gear If the TCC Solenoid is operating properly the gauge pressure will fluctuate when lockup is achieved Did gauge fluctuate Yes gt GoTo 3 No Refer to service instructions for proper service procedure Torque Converter Assembly or stuck TCC Solenoid and repair as necessary Perform Powertrain Verification Test VER 5A 302 TRANSMISSION P 0740 TORQUE CONV CLUTCH NO RPM DROP AT LOCKUP Continued ACTION APPLICABILITY Ignition Off TRANSMISSION Check Transmission Fluid level and ensure it is clear of any debris AUTOMATIC Is the Transmission Fluid okay 3 SPD 31TH Yes gt GoTo 4 No Repair as necessary Perform Powertrain Verification Test VER 5A Ignition Off TRANSMISSION Disconnect the TCC Solenoid connector
69. ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV DRIVEABILITY P 1391 INTERMITTENT LOSS OF CMP OR CKP Continued APPLICABILITY Ignition Off ENGINE 3 0L V6 At the CMP Sensor backprobe the CMP Sensor Signal Circuit with the Oscilloscope voltage measurement lead Start the Engine and observe the CMP Sensor voltage pattern on the Oscilloscope Are there any of the Camshaft Position Sensor Signals missing Yes gt GoTo 13 GoTo 16 Ignition Off ENGINE 3 0L V6 Disconnect the CMP Sensor Connector Note Check connectors Clean repair as necessary Inspect all Terminals Is any Terminal damaged pushed out or miswired Yes gt Repair Terminal s for damage pushout or miswiring Perform Powertrain Verification Test VER 5A No gt GoTo 14 Ignition Off ENGINE 3 0L V6 Disconnect the PCM Note Check connectors Clean repair as necessary Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes gt Repair Terminal s for damage pushout or miswiring Perform Powertrain Verification Test VER 5A gt GoTo 15 Ignition Off ENGINE
70. Engine Not Running Wiggle MAP Sensor Connector amp Harness Monitor the DRB display Was there any MAP Sensor voltage change Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A gt GoTo 7 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete If there are no potential causes remaining the PCM is assumed to be defective 31 DRIVEABILITY Symptom P 0108 MAP SENSOR VOLTAGE TOO HIGH ee When Monitored and Set Condition P 0108 MAP SENSOR VOLTAGE TOO HIGH When Monitored With engine rpm above 400 but less than 1500 and closed throttle Set Condition The MAP Sensor Signal voltage is greater than 4 6 POSSIBLE CAUSES MAP SENSOR GROUND CIRCUIT OPEN MAP SENSOR SIGNAL CIRCUIT OPEN MAP SENSOR DEFECTIVE MAP SENSOR WIRING HARN AND CONN INTERMITTENT DEF MAP SENSOR WIRING HARNESS AND CONN OBSERVABLE DEF PCM DEFECTIVE MAP SENSOR VOLTAGE TOO HIGH ACTION APPLICABILITY Start the engine All With the DRB read the MAP Sensor voltage 15 the MAP Sensor voltage above 4 6 volts Yes gt GoTo 2 gt GoTo 6 Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Connect a jumper wire between the Sensor Signal and Sensor Ground Circuits Turn
71. Evap Purge Solenoid Control Circuit code return Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 5A No GoTo 9 Ignition Off Using the Schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 10 Ignition Engine Not Running With the DRB actuate the Evap Purge Solenoid With the DRB read codes 15 the Global Good Trip displayed and equal to 0 Yes gt GoTo 12 GoTo 18 Ignition Off A Disconnect Proportional Purge Solenoid Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the Proportional Purge Solenoid 15 the resistance 14 2 ohms 1 4 Yes gt GoTo 13 No Replace the open Proportional Purge Solenoid Perform Powertrain Verification Test VER 5A 145 Check the freeze frame data to determine the conditions when code was set ALL Attempt duplication of freeze frame conditions for added diagnostics If there no other possible causes remaining there is assumed to be an tent problem with a Wiring Harness Connector or Wire View repair options Repair Visually inspect related Wire Harness Connectors and Harnesses Look for broken bent pushed out or corroded terminals and for chafed pierced or partiallly broken wire respective
72. Field Driver Circuit Generator to PCM Perform Powertrain Verification Test VER 3A Ignition Off If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 3A 17 CHARGING Symptom List P 1492 BATTERY TEMP SENSOR VOLTAGE TOO HIGH P 1493 BATTERY TEMP SENSOR VOLTAGE TOO LOW Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be P 1492 BATTERY TEMP SENSOR VOLTAGE TOO HIGH When Monitored and Set Condition P 1492 BATTERY TEMP SENSOR VOLTAGE TOO HIGH When Monitored With the ignition key on Set Condition ThePCM senses the voltage from the BTS to be either below 0 1 volts or above 4 9 volts for 3 seconds P 1493 BATTERY TEMP SENSOR VOLTAGE TOO LOW When Monitored With the ignition key on Set Condition ThePCM senses the voltage from the BTS to be either below 0 1 volts or above 4 9 volts for 3 seconds POSSIBLE CAUSES PCM DEFECTIVE APPLICABILITY Ignition On Engine Not Running All With the DRB read the Trouble Codes Does the show Battery Temperature Sensor Voltage with a run count of zero Yes Replace the PCM Perform Powertrain Verification Test VER 5A No Test Complete CHARGING Symptom P 1594 CHARGING SYSTEM VOLTAGE TOO HIGH POSSIBLE CAUSES GENERATOR FIELD DRIVER CIRCUIT SHORT TO GROUND GENE
73. G1 YELLOW 2 WAY 334 CLOCKSPRING C2 NATURAL 5 WAY 334 CLOCKSPRING C3 BLACK 2 WAY 52554 335 CLUTCH INTERLOCK SWITCH MTX BLACK 2 335 CLUTCH INTERLOCK SWITCH JUMPER EATX BLACK 2 WAY 335 CRANKSHAFT POSITION SENSOR BLACK 335 DATA LINK CONNECTOR BLACK 16 WAY 336 EGR SOLENOID GRAY 2 336 ENGINE COOLANT TEMPERATURE SENSOR BLACK 2 336 ENGINE OIL PRESSURE SWITCH GREEN 2 WAY 336 EVAP PURGE SOLENOID BLACK 2 337 DUTY CYCLE EVAP PURGE SOLENOID 337 FUEL INJECTOR NO 1 2 0 2 AL BLACK 2 337 FUEL INJECTOR 1 3 3L 3 8L BLACK 2 338 FUEL INJECTOR NO 2 2 0L 2 4L BLACK 2 338 FUEL INJECTOR NO 2 3 3L 3 8L BLACK 2 338 FUEL INJECTOR NO 3 3 3L 3 8L BLACK 2 338 FUEL INJECTOR NO 2 0L 2 4L BLACK 2 339 FUEL INJECTOR NO 4 3 3L 3 8L BLACK 2 339 FUEL INJ
74. GoTo 4 No Repair the open ASD Relay Output Circuit Perform Powertrain Verification Test VER 5A Note It may be necessary to remove the Intake Plenum in the following steps Key off Disconnect the Injector 4 Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure across the Injector 4 Driver Circuit from the PCM to the Injector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Injector 4 Driver Circuit Perform Powertrain Verification Test VER 5A Note It may be necessary to remove the Intake Plenum in the following steps Key off Disconnect the Injector Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Injector 4 Driver Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Injector 4 Control Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 6 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Engine Running Wiggle Wiring Harness from the Injector to the PCM Does the eng
75. HAND CODEG PENE HORE 7 3 3 2 INTERMITTENT 8 3 3 3 RESET COUNTER on 8 3 3 4 HANDLING NO TROUBLE CODE PROBLEMS 8 34 USING THE DAB 11 3 5 DRB ERROR MESSAGES AND BLANK 11 3 5 1 DRE DOES NOT POWER ud ee eee kes 11 3 5 2 DISPLAY IS NOT 11 DISCLAIMERS SAFETY 11 DISCLAIMERS deca 11 42 SAPS hs 2946 Hebe eee 11 4 2 1 TECHNICIAN SAFETY 11 42 2 VEHICLE PREPARATION FOR 5 12 4 2 3 SERVICING SUB ASSEMBUES 12 424 DRBIII SAFETY 1 12 43 WARNINGS AND CAUTIONS dees odes dowd 12 431 ROAD TES WARNINGS 222003 bseeteeneawnteieusaverwen eee ea 12 4 3 2 VEHICLE DAMAGE CAUTIONS 12 4 3 3 ELECTRONIC PINION FACTOR 13 RECOMMENDED TOOLS AND 13 GLOSSARY
76. Ignition Off Using the schematic as a guide inspect the wiring and connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete Perform Powertrain Verification Test VER 2A 148 DRIVEABILITY Symptom P 0462 FUEL LEVEL SENDING UNIT VOLTS TOO LOW POSSIBLE CAUSES FUEL LEVEL SENSOR DEFECTIVE FUEL LEVEL SENSOR SIGNAL CIRCUIT SHORTED TO GROUND FUEL LEVEL SENSOR WIRING HARNESS INTERMITENT DEFECT BODY CONTROL MODULE DEFECTIVE FUEL LEVEL SENSOR WIRING HARNESS OBSERVABLE DEFECT TEST COMPLETE ACTION APPLICABILITY Ignition On With the DRB read the is the Global Good Trip counter displayed and equal to zero Yes gt GoTo 2 No gt GoTo 5 Ignition Off Disconnect the Fuel Pump Module Harness Connector Note Check connectors Clean repair as necessary With the DRB read the Fuel Level Sensor voltage 15 the Fuel Level Sensor voltage above 4 5 volts Yes Replace the Fuel Level Sensor Perform Powertrain Verification Test VER 2A No gt GoTo 3 Key Off All Disconnect the Body Control Module GREY Connector Check connectors Clean repair as necessary Using an Ohmmeter measure the Fuel Level Sensor Signal Circuit for resistance to ground 15 the resistance below 5 0 ohms Yes Repair the Fuel Level Sensor Signal Circuit shorted to ground Perform Powertrain Verification Test VER 2A gt GoTo 4 If there ar
77. Intake Plenum in the following 3 3L V6 and or EN step GINE 3 8L V6 Disconnect the Injector 6 Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 FFV Turn ignition on With the DRB actuate the ASD Reay Using a Voltmeter measure the ASD Relay Output voltage Does the voltage cycle high and low Yes gt GoTo 4 No Repair the open Auto Shutdown Relay Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L Note It may be necessary to remove the Intake Plenum in the following 3 3L V6 and or EN step GINE 3 8L V6 Disconnect the Injector 6 Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 FFV Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Injector 6 Driver Circuit from the PCM to the Injector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Injector 6 Driver Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L Note It may be necessary to remove the Intake Plenum in the following 3 3L V6 and or EN step GINE 3 8L V6 Disconnect the Injector 6 Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 FFV Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the
78. No Refer to symptom P 0505 IDLE AIR CONTROL MOTOR CIR CUITS in the DRIVEABILITY category Ignition Off Start engine allow engine idle to stabilize for 60 seconds Check engine Vacuum Hoses and Components for vacuum leaks Ensure PCV Valve is the correct part and is operating correctly Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 10 Ignition Off Remove the Motor from the housing Turn Ignition on with Engine Not Running With the DRB actuate the Stepper Motor Wiggle the Wiring Harness from the IAC Motor to the PCM Did the IAC stop operating at any time Yes Repair the Harness or Connectors as necessary Perform Powertrain Verification Test VER 5A No gt GoTo 11 Ignition On Engine Not Running Check Throttle Plate and Linkage for a binding condition The Throttle Linkage must be free and the Throttle Plate at the idle position Ensure Throttle Plate is fully closed and against its stop 15 the Throttle Plate and Linkage okay Yes gt GoTo 12 No Repair as necessary Perform Powertrain Verification Test VER 5A Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Complete 182 DRIVEABILITY Symptom P 1297 NO CHANGE IN MAP FROM START TO RUN When Monitored
79. On Using the schematic as a guide wiggle the Fuel Pump Module Connector and Harness Using the DRB monitor the Fuel Level Sensor voltage Was there any Fuel Level Sensor voltage change Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 2A gt GoTo 7 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete Perform Powertrain Verification Test VER 2A 152 DRIVEABILITY Symptom P 0500 NO VEHICLE SPEED SENSOR SIGNAL When Monitored and Set Condition P 0500 NO VEHICLE SPEED SENSOR SIGNAL When Monitored For 3 Speed With engine running transmission not in park or neutral brakes not applied engine rpm greater than 1500 For 4 Speed With the engine running transmission not in park or neutral brakes not applied engine rom greater than 1500 Set Condition For 3 Speed No signal from the vehicle speed sensor for more than 11 seconds for 2 consecutive trips F or 4 Speed No signal from the vehicle speed sensor is present for more than 11 seconds for 2 consecutive trips POSSIBLE CAUSES ELECTRONIC AUTO TRANSAXLE TROUBLE CODES PRESENT 8 VOLT SUPPLY CIRCUIT OPEN PCM DEF NO VSS SIGNAL CKT PCM TERMINAL DEFECTIVE VEHICLE SPEED SENSOR GROUND CIRCUIT OPEN VEHICLE SPEED SENSOR SIGNAL CIRCUIT WIRIN
80. Powertrain Verification Test VER 5A Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Injector 1 Driver Circuit Is the resistance below 5 0 ohms Yes Repair the Injector 1 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 5A No gt GoTo 6 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 8 Ignition Off All Disconnect the Injector 1 Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector 84 DRIVEABILITY 0201 ECTOR 1 CONTROL CIRCUIT Continued APPLICABILITY All ACTION Engine Running Wiggle Wiring Harness from the Injector to the PCM Does the engine miss or stall Repair as necessary where wiggling caused the problem to appear Perform Powertrain Verification Test VER 5A Yes gt Test Complete 85 DRIVEABILITY Symptom P 0202 INJ ECTOR 2 CONTROL CIRCUIT When Monitored and Set Condition P 0202 INJ ECTOR 2 CONTROL CIRCUIT When Monitored With battery voltage greater than 12 volts t
81. Powertrain Verificaton Test VER 2A No gt GoTo 3 Ignition On Engine Not Running Disconnect the Throttle Position Sensor Connector Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary With the voltmeter probe the TP Sensor 5 Volt Supply Circuit to the TP Sensor Is the 5 Volt Supply Circuit voltage above 4 0 volts Yes Replace the Map Sensor Perform Powertrain Verification Test VER 2A gt GoTo 4 212 DRIVEABILITY P 1496 5 VOLT SUPPLY OUTPUT TOO LOW Continued ACTION APPLICABILITY Ignition Off Disconnect the Throttle Position Sensor Connector Disconnect the MAP Sensor Electrical Connector Disconnect the A C Sensor Connector Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary With the ohmmeter probe the 5 volt supply circuit at the TPS Connector 15 the resistance below 5 0 ohms Yes Repair the 5 volt Supply Circuit for a short to ground Perform Powertrain Verification Test VER 2A No gt GoTo 5 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Is the voltage reading below 4 5 volts Yes gt ReplacetheTPS Perform Powertrain Verification Test VER 2A No Test Complete Ignition On Engine Not Running Disconnect the MAP Sensor
82. Running All With the DRB read the MAP Sensor voltage 15 the MAP Sensor voltage below 1 2 volts Yes gt GoTo 2 No gt GoTo 6 Ignition Off Disconnect the MAP Sensor Electrical Connector Ignition on engine not running Note Check connectors Clean repair as necessary Use the DRB to read MAP Sensor voltage Is the MAP Sensor voltage above 4 0 volts Yes Replace the MAP Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 3 30 DRIVEABILITY P 0107 MAP SENSOR VOLTAGE TOO LOW Continued APPLICABILITY Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the MAP Sensor Signal Circuit to ground 15 resistance below 5 0 ohms Yes gt Repair MAP Sensor Signal Circuit shorted to ground Perform Powertrain Verification Test VER 5A gt GoTo 4 Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the MAP Sensor Signal Circuit to Sensor Ground at MAP Sensor Connector 15 resistance below 5 0 ohms Yes gt Repair MAP Sensor Signal Circuit shorted to Sensor Ground Circuit Perform Powertrain Verification Test VER 5A GoTo 5 View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Ignition On
83. SHORT TO GROUND RADIATOR FAN MOTORS W H INTERMITTENT DEFECT RADIATOR FAN MOTORS W H OBSERVABLE DEFECT RADIATOR FAN RELAY CONTROL CIRCUIT OPEN PCM DEFECTIVE RADIATOR FAN MOTORS ACTION APPLICABILITY Ignition On All With the DRB actuate the Radiator Fan Relay Are both of the Radiator Fan Motors cycling on and off Yes gt GoTo 2 gt GoTo 4 Ignition On With the DRB actuate the Radiator Fan Relay Wiggle the Wiring Harness from the Relay to the PCM Did the wiggling interrupt the Radiator Fan Motor cycling Yes Repair as necessary where wiggling caused the cycling to be interrupted Perform Powertrain Verification Test VER 5A GoTo 3 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 203 DRIVEABILITY P 1491 RADIATOR FAN CONTROL RELAY CIRCUIT Continued ACTION APPLICABILITY Ignition On With the DRB actuate the Radiator Fan Relay Using a voltmeter the Fan Relay Output Circuit voltage at the Relay Connector Does the voltage cycle from below 1 0 volt to Battery voltage Yes Repair or replace Radiator Fans or Relay to Fan Wiring as necessary Perform Powertrain Verification Test VER 5A GoTo 5 Ignition Off Disconnect the Radiator Fan Relay Connector Note Check connectors Clean repair as necessary Turn key on Using a Volt
84. THE DRB SCREEN WHILE IN MOTION DO NOT HANG THE DRB FROM THE REAR VIEW MIRROR OR OPERATE IT YOURSELF HAVE AN ASSISTANT AVAILABLE TO OPERATE THE DRB 4 3 2 VEHICLE DAMAGE CAUTIONS Before disconnecting any control module make sure the ignition is off Failure to do so could damage the module When testing voltage or continuity at any control module use the terminal side not the wire end of the connector Do not probe a wire through the insulation this will damage it and eventually cause it to fail because of corrosion Be careful when performing electrical tests so as to prevent accidental shorting of terminals Such mistakes can damage fuses or components Also a second code could be set making diagnosis of the original problem more difficult 4 3 3 ELECTRONIC PINION FACTOR WARNING The pinion factor must be set for all new trans mission control modules If the pinion factor is not set or if it is set incorrectly any speed related accessories will not operate or will operate inaccu rately This includes the speedometer speed con trol rolling door locks and other devices that are operated by the powertrain and body control mod ules For instructions on setting the pinion factor see the appropriate transmission diagnostic man ual or the service manual 5 0 RECOMMENDED TOOLS AND EQUIPMENT DRBIII diagnostic readout box scan tool fuel pressure adapter C 6631 or 6539 fuel pressure kit C 4799 B or 50
85. THE SECONDARY IGNITION SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 2 0L Disconnect the Spark Plug Cable at Spark Plug 2 2 4L 1 4 DOHC Connect the other end of the Cable to a Spark Tester Connec the Spark Tester to a good Ground Ensure that there are no fuel or fuel vapors present in or near the Engine Compartment before continuing with the test While cranking the Engine for 10 seconds watch for spark Is there good spark Yes gt GoTo 18 GoTo 22 Ignition Off ENGINE 2 0L Disconnect Ignition Coil Secondary Cables 1 and 4 from the Ignition Coil 2 4L 1 4 DOHC Terminals Note Check connectors Clean repair as necessary With Ohmmeter test the resistance between Coil Terminals 1 and 4 15 the resistance between 10 9 and 14 7 ohms Yes gt GoTo 19 No Replace the Ignition Coil Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect Ignition Coil Secondary Cable 1 from the Ignition Coil Terminal 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Disconnect the Coil Secondary Cable at Spark Plug 1 Note Check connectors Clean repair as necessary With Ohmmeter test the resistance of Ignition Coil Secondary Cable 1 15 the resistance below 15 ohms Yes gt GoTo 20 No Replace Ignition Coil Secondary Cable 1 Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L
86. THROTTLE POSITION SENSOR CALIBRATION POSSIBLE CAUSES TPS VOLTAGE CHANGE NOT A SMOOTH TRANSITION TPS VOLTAGE ABOVE 1 5 WITH THROTTLE CLOSED THROTTLE CABLE AND BODY BINDING OR RESTRICTED TPS VOLTAGE BELOW 3 4V AT WIDE OPEN THROTTLE ACTION APPLICABILITY Ignition Off Check the Throttle Cable and Body for binding or restrictions Note Also check Speed Control Cable if equipped Is there any binding or restriction Yes Repair as necessary Perform Verification Test VER 2A GoTo 2 Ignition On Engine Not Running With the DRB read the Throttle Position Sensor voltage Note Throttle must be fully closed and against the Throttle Stop Is the voltage 1 5 V or less with the Throttle closed Yes gt GoTo 4 No Replace Throttle Position Sensor Perform Verification Test VER 2A Was the maximum voltage at least 3 4 volts at wide open Throttle Yes Test Complete No Replace Throttle Position Sensor Perform Verification Test VER 2A Ignition On Engine Not Running All While slowly opening the Throttle from closed to wide open monitor the Throttle Position Sensor voltage at the DRB Was the voltage change a smooth transition Yes gt GoTo 3 No Replace Throttle Position Sensor Perform Verification Test VER 2A 254 DRIVEABILITY Symptom CHECKING THE A C PRESSURE SENSOR SIGNAL POSSIBLE CAUSES A C PRESSURE SENSOR 5 VOLT SUPPLY CIRCUIT OPEN HIGH RESISTANCE IN THE A C PRESSURE SE
87. Temperature Sensor Perform Verification Test VER 5A Turn ignition off Connect a Vacuum Gauge to a Manifold Vacuum source Start the engine Allow the engine to idle Note If engine will not idle maintain a constant RPM above idle Using the DRB in Sensors read the MAP Sensor vacuum value 15 the reading within 1 of the Vacuum Gauge reading Yes gt GoTo 7 No Replace the MAP Sensor Perform Powertrain Verification Test VER 5A Note Engine must be at operating temp and in closed loop to perform this test Start engine and run until operating temp and closed loop mode is reached With the DRB under System Tests go to Purge Vapors Test Observe the Short Term Adaptive value and press 3 to flow Note Short Term Adaptive should change Did the Short Term Adaptive value change Yes gt GoTo 8 No Refer to symptom CHECKING EVAPORATIVE EMISSION SYSTEM in the DRIVEABILITY category 80 0172 1 1 FUEL SYSTEM RICH Continued ACTION APPLICABILITY Turn ignition off All Warning The fuel system is under a constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Remove the pressure test port cap at the fuel rail test port Connect a fuel pressure gauge to the test port pressure fitting on the fuel rail Ignition on With the DRB actuate the ASD Fuel System test and observe the fuel p
88. Test Select 1 to Pump Press the down arrow on the DRB several times The LEAK DETECT PUMP SW state should change from Open UP to CLOSED DN Did the Leak Detect Pump Switch state change as described Yes gt GoTo 2 gt GoTo 4 206 DRIVEABILITY P 1494 LEAK DETECTION PUMP PRESSURE SWITCH Continued ACTION APPLICABILITY Ignition on engine not running With the DRB read DTCs and Freeze Frame Data and record With the DRB Clear DTCs Start the engine and allow the engine to idle With the DRB perform the LDP Monitor test Wiggle the wiring harness and connectors from the LDP connector to the PCM connector while the monitor is running Note Be careful of the engine s moving parts With the DRB Read DTCs Does the P 1494 Leak Detection Pump Sw or Mechanical Fault DTC return during the wiggle test Yes Repair the wiring harness or connector as necessary Perform Powertrain Verification Test VER 5A No GoTo 3 Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition Off Disconnect the LDP Connector Note Check connectors Clean repair as necessary Engine off key on Using a voltmeter probe the Fused Ignition Switch Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 5 No Repair the open Fused Ignition
89. Test VER 5A No gt GoTo 3 175 DRIVEABILITY 1195 SLOW 1 1 025 DURING CATALYST MONITOR Continued ACTION APPLICABILITY Ignition Off Disconnect the U pstream Oxygen Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance from the O2 Sensor Ground Circuit to a good ground 15 the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open Sensor Ground Circuit to the Upstream Oxygen Sensor Perform Powertrain Verification Test VER 5A Ignition Off All Disconnect the Upstream Oxygen Sensor Connector Note Check connectors Clean repair as necessary Inspect the Connectors and Terminals Is any Terminal damaged pushed out or miswired Yes Repair or replace as necessary Perform Powertrain Verification Test VER 5A No GoTo 5 Ignition Off Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Inspect the Connector 15 the Connector condition OK Yes gt GoTo 6 No Repair as necessary Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the Upstream Oxygen Sensor is assumed to be defective View repair options Repair Replace the Upstream Oxygen Sensor Perform Powertrain Verification Test VER 5A 176 DRIVEABILITY Symptom P 1281 ENGINE IS COLD TOO LONG When Monitored and Set Condition P 1281 ENGINE 15 COLD TOO LONG W
90. Throttle 15 the voltage change smooth Yes gt GoTo 3 Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A 79 0172 1 1 FUEL SYSTEM RICH Continued APPLICABILITY Ignition On Engine Not Running With the DRB read TP Sensor voltage Throttle must be against stop Is the voltage 0 92 or less with the Throttle closed Yes gt GoTo 4 No Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A Turn ignition on With the DRB in sensors read the Eng Coolant Tmp Deg value Note If engine coolant temperature is above 82 C 180 F allow the engine to cool until 62 C 150 F is reached Start the Engine While monitoring the DRB allow the engine to reach normal operating temperature above 82 C 180 F Did the engine coolant temperature value reach 180 F or above Yes gt GoTo 5 No Replace the Engine Coolant Temperature Sensor Perform Powertrain Verification Test VER 5A Turn ignition On All With the DRB in sensors read the Eng Coolant Tmp Deg value Note If engine coolant temperature is above 82 180 F allow the engine to cool until 62 C 150 F is reached Start the Engine While monitoring the DRB allow the engine to reach normal operating temperature above 82 C 180 F Was the coolant temperature value increase a smooth transition Yes gt GoTo 6 No Replace the Engine Coolant
91. VISIBLE Low temperatures will affect the visibility of the display Adjust the contrast to compensate for this condition DRB DISPLAY REPLACEABLE LENS FUNCTION ENTER KEYS KEYS ARROW KEYS CONTRAST D with YES key Oe ABO BACK LIGHTING with YES key KEYPAD SHIFT KEY LED 80b57566 4 0 DISCLAIMERS SAFETY WARNINGS 4 1 DISCLAIMERS All information illustrations and specifications contained in this manual are based on the latest information available at the time of publication The right is reserved to make changes at any time without notice 4 2 SAFETY 4 2 1 TECHNICIAN SAFETY INFORMATION WARNING ENGINES PRODUCE CARBON MONOXIDE THAT IS ODORLESS CAUSES SLOWER REACTION TIME AND CAN LEAD TO SERIOUS INJURY WHEN THE ENGINE IS OPERATING KEEP SERVICE AREAS WELL VENTILATED OR ATTACH THE VEHICLE EXHAUST SYSTEM TO THE SHOP EXHAUST REMOVAL SYSTEM Set the parking brake and block the wheels before testing or repairing the vehicle It is especially impor tant to block the wheels on front wheel drive vehicles the parking brake does not hold the drive wheels When servicing a vehicle always wear eye pro tection and remove any metal jewelry such as watchbands or bracelets that might make an inad vertent electrical contact When diagnosing a powertrain system problem it is important to follow approved procedures where GENERAL INFORMATION applicable Thes
92. a Manifold Vacuum source Start the engine Allow engine to idle Note If engine will not idle maintain a constant RPM above idle Using the DRB read MAP Sensor Vacuum 15 the reading within 1 inch of the teed in Vacuum Gauge Yes gt GoTo 2 No Replace the MAP Sensor Perform Verification Test VER 2A Ignition Off Disconnect the MAP Sensor Harness Connector Ignition On Using a voltmeter measure the 5 volt supply circuit Is the voltage above 4 0 volts Yes Test Complete No Repair the open 5 volt supply circuit Perform Verification Test VER 2A 245 DRIVEABILITY Symptom CHECKING MINIMUM IDLE AIR FLOW POSSIBLE CAUSES MINIMUM AIR FLOW IS WITHIN ACCEPTABLE RANGE THROTTLE BODY DEFECTIVE MIN AIR FLOW OUT OF RANGE ACTION APPLICABILITY Start the engine and allow it to reach operating temperature All Perform the Minimum Air Flow test as described in service information Is idle RPM within the range shown in the chart Yes gt Throttle Body minimum air flow is set correctly gt GoTo 2 Ignition Off Remove Throttle Body per service information Note Clean Throttle Body in a well ventilated area and wear rubber gloves While holding the Throttle open spray entire Throttle Body Bore with Mopar parts cleaner Using a soft scuff pad dean the Throttle Body Bore and Throttle Plate Using compressed air dry the Throttle Body and install Throttle Body on manifold Start the engine a
93. above 1 2 volts POSSIBLE CAUSES 1 1 2 SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE 1 1 02 SEN HARNESS INTERMITTENT SHORT TO VOLTAGE 1 1 02 SENSOR CONNECTOR OBSERVABLE DEFECT A 1 1 02 SENSOR CONNECTOR OBSERVABLE DEFECT B 1 1 2 SENSOR HARNESS OBSERVABLE DEFECT 1 1 2 SENSOR DEFECTIVE ACTION APPLICABILITY Start the engine All With the DRB read the Upstream O2 Sensor voltage 15 the Upstream O2 Sensor voltage above 1 2 volts Yes gt GoTo 2 No gt GoTo 5 Ignition Off Disconnect the Upstream O2 Sensor Note Check connectors Clean repair as necessary Start the engine With the DRB read the Upstream O2 Sensor Voltage Is the Upstream O2 Sensor voltage above 1 2 volts Yes Repair the Upstream O2 Sensor Signal Circuit for a short to voltage If ok replace the PCM Perform Powertrain Verification Test VER 5A No gt GoTo 3 Ignition Off Disconnect the Upstream O2 Sensor Note Check connectors Clean repair as necessary Is any Terminal damaged pushed out or miswired Yes Repair or replace as necessary Perform Powertrain Verification Test VER 5A gt GoTo 4 55 DRIVEABILITY 0132 1 1 02 SENSOR SHORTED TO VOLTAGE Continued ACTION APPLICABILITY If there are no potential causes remaining the U pstream O2 Sensor is assumed to be defective View repair options Repair Replace the U pstream O2 Sensor Perform Powertrain Verification Test VER 5A Start the engine Wiggl
94. and Set Condition P 1297 NO CHANGE IN MAP FROM START TO RUN When Monitored Engine is idling with a stable RPM RPM fluctuation lt 64 RPM and the vehicle is not moving Set Condition small a difference is seen between barometric pressure at ignition and manifold vacuum POSSIBLE CAUSES MAP SENSOR 5 VOLT SUPPLY CIRCUIT OPEN MAP SENSOR WIRING HARNESS INTERMITTENT DEF VACUUM PORTS RESTRICTED OR DEFECTIVE MANIFOLD ABSOLUTE PRESSURE SENSOR RESTRICTED MAP SENSOR DEFECTIVE A MAP SENSOR DEFECTIVE B APPLICABILITY Ignition On Engine Not Running All With the DRB read codes Is MAP Sensor voltage too low code set Yes Refer tosymptom 0107 MAP SENSOR VOLTAGE TOO LOW in the DRIVEABILITY category No GoTo 2 With the DRB erase Codes Ignition On Engine Not Running Start engine and allow engine to idle for 30 seconds With the DRB read codes Does the show No change MAP from start to run Yes gt GoTo 3 No GoTo 6 Ignition on with engine not running Disconnect MAP Sensor Note Check connectors clean repair as necessary Ignition on with engine not running Using a Voltmeter measure the MAP Sensor 5 Volt Supply Circuit at the MAP Sensor Connector 15 the voltage above 4 0 volts Yes gt GoTo 4 No Repair the open MAP Sensor 5 volt Supply Circuit Perform Powertrain Verification Test VER 5A 183 DRIVEABILITY P 1297 NO CHANGE IN MAP
95. arming conditions are met a trouble code will be stored in the PCM memory The On Board Diagnostics have evolved to the second Generation of Diagnostics referred to as Euro Stage On Board Diagnostic The following table summarizes the various OBDII monitors operation GENERAL INFORMATION EURO STAGE OBD MONITOR INFORMATION Comprehensive Components Monitor Major Monitors Non Fuel Control amp Non Misfire Major Monitors Fuel Control amp Misfire Run constantly Includes All Engine Hardware Sensors Switches Solenoids etc One Trip Faults Turns On The MIL and Sets DTC After One Failure except for most ra tionality tests which are two trip Priority 3 All Checked For Continuity Open Short To Ground Short To Voltage Inputs Checked For Rationality Outputs Checked For Functionality Requires 3 Consecutive Global Alternate Good Trips to Extinguish the MIL Run Once Per Trip Monitors Entire Emission System Two Trip Faults Turns On The MIL and Sets DTC After Two Consecutive Failures Priority 1 or 3 Done Stop Testing Yes Oxygen Sensor Heater Oxygen Sensor Response Catalytic Converter Efficiency Except EWMA up to 6 tests per trip and a one trip fault EGR System Requires 3 Consecutive Global Good Trips to Extinguish the MIL 40 Warm Up Cycles are required to erase DTC s after the MIL has been extinguished Run Constantly Monitors Ent
96. at Spark Plug 1 Connect the Cable to a Spark Tester Connect the Spark Tester to a good Ground Werning Ensure that there are no Fuel or Fuel vapors present in or near the Engine compartment before continuing with the test While cranking the Engine for 10 seconds watch for spark 15 there good spark Yes Refer to Symptom list for further diagnostic tests No gt GoTo 2 288 STARTING CHECKING THE SECONDARY IGNITION SYSTEM Continued APPLICABILITY Ignition Off ENGINE 3 0L V6 Remove the Coil Secondary Cable from the Distributor Hold the Cable within 1 4 of a good Ground Caution Engine Controller damage may occur if more than 1 4 While cranking the Engine for 10 seconds watch for spark Note Consider 1 or 2 sparks as a No Spark condition 15 there good spark Yes Repair the Secondary Ignition Distributor Cap Rotor Cables Perform Verification TEST VER 1A No GoTo 3 Ignition Off ENGINE 3 0L V6 Remove the Coil Secondary Cable With an Ohmmeter test the Coil Secondary Cable for resistance 15 the resistance above 15 Kohms Yes Replace the Coil Secondary Cable Perform Verification TEST VER 1A No gt GoTo 4 Ignition Off ENGINE 3 0L V6 Remove the Distributor Cap While cranking the Engine watch for the Rotor to turn Did the Rotor turn when the Engine was cranked Yes gt GoTo 5 No gt GoTo 14 Ignition Off ENGINE 3 0L V6 Disconnect
97. attempt to determine the cause In the FREEZE FRAME the adaptive fuel percentages greater than H 15 Yes gt GoTo 5 GoTo 10 101 DRIVEABILITY P 0300 MULTIPLE CYLINDER MIS FIRE Continued ACTION APPLICABILITY With an appropriate container obtain a fuel sample from the vehicle Is the fuel free from contamination Yes gt GoTo 6 Replace contaminated fuel and clean system Perform VERIFICATION TEST VER 5A2 Perform Fuel Pressure Leak Down Test per service instructions Did the Fuel Pressure Leak Down Test pass Yes gt GoTo 7 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 Perform Fuel Pump Amperage Test per service instructions Did the Fuel Pump Amperage Test pass Yes gt GoTo 8 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 Perform Fuel Pump Capacity Test per service instructions All Did the Fuel Pump Capacity Test pass Yes gt GoTo 9 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 Perform Fuel Pump Pressure Test per service instructions Did the Fuel Pump Pressure Test pass Yes gt GoTo 10 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 With the DRB read the FREEZE FRAME DATA Use the freeze frame data and attempt to determine the cause In the FREEZE FRAME is the LOAD VALUE over 50 and the
98. field driver SPEED CONTROL SYSTEM The PCM controls vehicle speed by operation of the speed control servo vacuum and vent solenoids Energizing the vacuum solenoid applies vacuum to the servo to increase throttle position Operation of the vent solenoid slowly releases the vacuum allow ing throttle position to decrease A special dump solenoid allows immediate release of throttle posi tion caused by braking cruise control switch turned off shifting into neutral excessive RPM tires spin ning or ignition key off 3 2 4 PCM OPERATING MODES As input signals to the powertrain control module PCM change the PCM adjusts its response to output devices For example the PCM must calcu late a different injector pulse width and ignition timing for idle than it does for wide open throttle There are several different modes of operation that determine how the PCM responds to the various input signals There are two types of engine control operation open loop and closed loop In open loop operation the PCM receives input signals and responds according to preset program ming Inputs from the heated oxygen sensors are not monitored In closed loop operation the PCM monitors the inputs from the heated oxygen sensors This input indicates to the PCM whether or not the calculated injector pulse width results in the ideal air fuel ratio of 14 7 parts air to 1 part fuel By monitoring the exhaust oxygen content through the oxygen sensor
99. ignition on use the DRB to read the MAP Sensor voltage Is the voltage below 1 0 volt Yes Replace the MAP Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 3 Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Connect a jumper wire between the Sensor Signal Circuit and an engine ground Ignition On Read the MAP Sensor voltage 15 the MAP Sensor voltage below 1 0 volt Yes Repair the open MAP Sensor Ground Circuit Perform Powertrain Verification Test VER 5A gt GoTo 4 32 DRIVEABILITY P 0108 MAP SENSOR VOLTAGE TOO HIGH Continued APPLICABILITY Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an ohmmeter test the MAP Sensor Signal Circuit for resistance Is the resistance below 5 0 ohms Yes gt GoTo 5 No the open MAP Sensor Signal Circuit Perform Powertrain Verification Test VER 5A If no potential causes remaining the PCM is assumed to be defective All View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Start the engine With the DRB read the MAP Sensor voltage Wiggle MAP Sensor Connector and Harness Monitor the MAP Sensor voltage Was there any MAP Sensor voltage change when
100. less than 10ms and engine speed less than 3000 rpm Set Condition This trouble code takes 64 to 10 0 seconds to set when no inductive kick is sensed 18ms after injector turn off and with no other injectors on POSSIBLE CAUSES ASD RELAY OUTPUT CIRCUIT OPEN ECTOR 4 DEFECTIVE ECTOR 34 DRIVER CIRCUIT OPEN ECTOR 4 DRIVER CIRCUIT SHORTED TO GROUND PCM DEFECTIVE ACTION APPLICABILITY Ignition Off ALL Start engine let idle for at least 20 seconds Key on engine off With the DRB read Trouble Codes Is the Global Good Trip counter displayed and equal to zero Yes gt GoTo 2 gt GoTo 7 Note It may be necessary to remove the Intake Plenum in the following steps Key off Disconnect the 4 Injector Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure resistance of Injector 4 Is the resistance between 10 0 and 16 0 ohms Yes gt GoTo 3 Replace the Fuel Injector Perform Powertrain Verification Test VER 5A 92 DRIVEABILITY P 0204 INJ ECTOR 4 CONTROL CIRCUIT Continued ACTION APPLICABILITY Note It may be necessary to remove the Intake Plenum in the following steps Disconnect the 4 Injector Connector Note Check connectors Clean repair as necessary Turn ignition on With the DRB actuate the Auto Shutdown Relay Using a Voltmeter measure the ASD Relay Output voltage Does the voltage cycle high and low Yes gt
101. must be looked for under specific conditions that cause them The following checks may assist you in identifying a possible intermittent problem e Visually inspect related wire harness connectors Look for broken bent pushed out or corroded terminals e Visually inspect the related harnesses Look for chafed pierced or partially broken wire e Refer to any Hotline Newsletters or technical service bulletins that may apply e Use the DRBIII data recorder or co pilot e Use the DRBIII PEP module lab scope 3 3 3 RESET COUNTER The reset counter counts the number of times the vehicle has been started since codes were last set erased or the battery was disconnected The reset counter will count up to 255 start counts The number of starts helps determine when the trouble code actually happened This is recorded by the PCM and be viewed the DRBIII as STARTS since set When there are no trouble codes stored in mem ory the DRBII1 will display NO DTC S Detected and the reset counter will show STARTS since clear 3 3 4 HANDLING NO TROUBLE CODE PROBLEMS Symptom checks cannot be used properly unless the driveability problem characteristic actually happens while the vehicle is being tested Select the symptom that most accurately de scribes the vehicle s driveability problem and then perform the test routine that pertains to this symp tom Perform each routine test in sequence until t
102. necessary Using an Ohmmeter measure the resistance between the CMP Sensor Signal Circuit and the 8 Volt Supply Circuit at the CMP Sensor Connector Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to the 8 volt Supply Circuit Perform Powertrain Verification Test VER 5A GoTo 9 Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CMP Sensor Signal Circuit from the CMP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A gt GoTo 10 Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the CMP Sensor Signal Circuit and the Sensor Ground Circuit at the CMP Sensor Connector Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to the Sensor ground Perform Powertrain Verification Test VER 5A GoTo 11 If there are no potential causes re
103. oan 287 CHECKING THE SECONDARY IGNITION 288 NO CRANK CONDITION 255 555 Gre decuiee Bearers sees eee 296 SIAR LAND STALL CONDIMION 22102456 the oes ev Gaede ds Hebe tee 301 TRANSMISSION P 0740 TORQUE CONV CLUTCH NO RPM DROP AT LOCKUP 302 P 0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT 304 1899 PARK NEUTRAL SWITCH STUCK IN PARK OR IN GEAR 307 ANTENNA FAILURE oe be OKs bx 310 FAILURE ered acre 310 EEPROM FAILURE beeen he 310 INTERNAL FAULTS pired r prin onde 310 FAILURE cd tone des bee oe esd 310 SERIAL LINK 1 Criended eae Ps wane Se 310 STACK OVERFLOW FAILURE gss aeua 310 SENTRY KEY IMMOBILIZER SYSTEM PCM STATUS FAILURE ete bed eee OES 311 ROLLING CODE FAILURE dea 311 SERIAL LINK EXTERNAL FAULT 22555 55 311 TRANSPONDER COMMUNICATION 313 TRANSPONDER ID MISMAIGCH 244220010202 She
104. off after the engine cools down Set Condition sensor output signal is received when the PCM powers up the sensor heater POSSIBLE CAUSES 1 1 02 SENSOR CONNECTOR DAMAGED 1 1 02 SENSOR GND CIRCUIT OPEN ASD RELAY OUTPUT CIRCUIT OPEN 1 1 2 SENSOR FAILURE 1 1 2 SENSOR HEATER ELEMENT FAILURE 1 1 025 HEATER FAILURE DOES NOT REOCCUR APPLICABILITY With the DRB read the DTCs All Is the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 2 gt GoTo 3 Turn Ignition On Engine Off wait three minutes With the DRB monitor the O2 Sensor voltage for a few minutes until the voltage stabilizes between 4 and 6 volts With the DRB actuate the O2 Heater Test Monitor O2 voltage for up to two minutes 15 the O2 Sensor voltage still between 4 and 6 volts Yes gt GoTo 4 No GoTo 3 At this time the 1 1 025 HEATER FAILURE does not exist or is an intermittent problem With the DRB read the FREEZE FRAME DATA With this screen attempt to duplicate the condition that has set this fault While using FREEZE FRAME DATA pay particular attention to the fault setting conditions such as speed temp load and map vacuum Does the 1 1 025 HEATER FAILURE reoccur Yes gt GoTo 4 No gt 1 1 025 Heater failure no longer exists Perform VERIFICATION TEST VER 5A3 62 DRIVEABILITY P 0135 O2S HEATER FAILURE Continued ACTION APPLICABILITY Disconnect the 1 1 2 Sensor Conne
105. or miswired 3 3L V6 FFV Yes Repair as necessary Perform Powertrain Verification Test VER 2A No gt GoTo 4 Ignition Off Engine 3 3L V6 Disconnect the Ignition Coil Connector and or 3 8L V6 Note Check connectors Clean repair as necessary and or Engine Using an ohmmeter measure the Ignition Coil 8 Primary Circuit for resistance 3 3L V6 FFV Is the resistance below 2 0 ohms Yes gt GoTo 5 Replace the Ignition Coil Perform Powertrain Verification Test VER 2A Ignition Off Engine 3 3L V6 Disconnect the Ignition Coil Connector and or 3 8L V6 Note Check connectors Clean repair as necessary and or Engine Disconnect the PCM Connector 3 3L V6 FFV Note Check connectors Clean repair as necessary Measure the resistance of Ignition Coil 3 Driver Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Ignition Coil 8 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 2A No gt GoTo 6 Ignition Off Engine 3 3L V6 Disconnect the PCM and or 3 8L V6 Note Check connectors Clean repair as necessary and or Engine Disconnect the Ignition Coil Connector 3 3L V6 FFV Note Check connectors Clean repair as necessary Using an ohmmeter measure the Ignition Coil 8 Driver Circuit for resistance from the PCM Connector to the Coil Connector Is the resistance below 5 0 ohms Yes gt GoTo 7 No Repair the open Ignition Coil Driv
106. problems It is not necessary to perform all of the tests in this book to diagnose an individual code Always begin by reading the diagnostic trouble codes using the DRBIII 3 3 1 HARD CODE A diagnostic trouble code that comes back within one cycle of the ignition key is a hard code This means that the defect is there every time the powertrain control module checks that circuit or function Procedures in this manual verify if the trouble code is a hard code at a the beginning of each test When it is not a hard code an intermit tent test must be performed Codes that are for Euro Stage OBD monitors will not set with just the ignition key on Comparing these GENERAL INFORMATION to non emission codes they will seem like an intermit tent These codes require a set of parameters to be performed The DRBIII pre test screens will help with this for MONITOR codes this is called a TRIP All EURO STAGE III OBD DTCs will be set after or in some cases two trip failures and the MIL will be turned on These codes require three successful no failures TRIPS to extinguish the MIL followed by 40 warm up cycles to erase the code 3 3 2 INTERMITTENT CODE A diagnostic trouble code that is not there every timethePCM checks the circuit is intermittent code Most intermittent codes are caused by wiring or connector problems Defects that come and go like this are the most difficult to diagnose they
107. repair as necessary Using an ohmmeter test the SCI Recieve Wire from the DLC for resistance to ground Is the resistance below 5 0 ohms Yes Repair the short to ground the SCI Receive Circuit Perform Powertrain Verification Test VER 1A No gt GoTo 6 Ignition Off All Disconnect the Powertrain Control Module Note Check the connectors Clean repair as necessary Using an ohmmeter test the SCI Transmit Wire from the PCM to DLC for resistance 15 the resistance below 5 0 ohms Yes gt GoTo 7 No Repair the open SCI Transmit Circuit Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using an ohmmeter test the SCI Transmit Wire from the DLC for resistance to ground Is the resistance below 5 0 ohms Yes Repair the short to ground the SCI Transmit Circuit Perform Powertrain Verification Test VER 1A No GoTo 8 Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using ohmmeter measure the resistance between the SCI Transmit and the SCI Receive circuits at the DLC 15 the resistance below 5 0 ohms Yes Repair the SCI Transmit Circuit and the SCI Receive circuits shorted together Perform Powertrain Verification Test VER 1A GoTo 9 273 STARTING RESPONSE CONDITION Continued ACTION APPLICABILITY
108. repair options Repair Replace the PCM Perform Powertrain Verification Test VER 4A Ignition off Disconnect the Powertrain Control Module Disconnect Speed Control Servo 4 way Connector Note Check connectors Clean repair as necessary With an ohmmeter test the resistance of the SC Vacuum Solenoid Control Circuit from the PCM to the Servo Connector 15 the resistance below 5 0 ohms Yes gt GoTo 8 No the open Speed Control Vacuum Solenoid Control Circuit Perform Powertrain Verification Test VER 4A Ignition off If there are no potential causes remaining the Speed Control Servo is assumed to be defective View repair options Repair Replace the Speed Control Servo Perform Powertrain Verification Test VER 4A Ignition off Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Key and S C On Using a Voltmeter probe Speed Control Power Supply Ckt at the Brake Sw Connector 15 the voltage above 10 0 volts Yes gt GoTo 11 gt GoTo 14 Ignition off All Disconnect the PCM Disconnect Speed Control Servo 4 way Connector Note Check connectors Clean repair as necessary With an ohmmeter test the resistance of the S C Vent Solenoid Control Circuit from the PCM to the Servo Connector 15 the resistance below 5 0 ohms Yes gt GoTo 9 No Repair the open Speed Control Vent Solenoid Control Circuit Perform Powertrain Verification Test VER
109. resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open Speed Control Ground Circuit to Switch Perform Powertrain Verification Test VER 4A 264 SPEED CONTROL SPEED CONTROL ON OFF SWITCH Continued ACTION APPLICABILITY Ignition Off Disconnect the Speed Control On Off and Set Switch Note Check connectors Clean repair as necessary Connect a jumper wire across the S C Sw Signal Circuit to Ground Circuit Ignition On Engine Not Running With the DRBIII read the S C Switch voltage Does the DRBIII display 0 00 volts Yes Replace the S C ON OFF and SET Switch Perform Powertrain Verification Test VER 4A No gt GoTo 5 Ignition Off Disconnect the Speed Control On Off and Set Switch Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the S C Switch Signal at the S C ON OFF SET Switch Connector to ground Is the resistance below 5 0 ohms Yes Repair the Speed Control Switch Signal Circuit for a short to ground Perform Powertrain Verification Test VER 4A No gt GoTo 6 No Repair the open Speed Control Switch Signal Circuit Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Speed Control On Off and set Switch Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using an ohmmeter measure the S C Switch Signal Ckt Switch to PCM Is the resistance below 5 0 ohms Y
110. supplied to the SKIM the SKIM performs an internal self test After the self test is completed the SKIM neergizes the antenna this activates the transponder chop responds to the challenge by generating an encrypted response message using the following Secret Key This is an electronically stored value identification number that is unique to each SKIS The secret key is stored in the SKIM PCM and all ignition key tranponders Challenge This is a random numbr that is generated by the SKIM at each ignition key cyde The secret key and challenge are plugged into an algorithm that produces the encrypted response message The transponder uses the crypto algo rithm to receive decode and respond to the message sent by the SKIM After responding to the coded message the transponder sends a transponder 10 message to the SKIM The SKIM compares the transponder 10 to the available valid key codes the SKIM memory 8 key maximum After validat ing the key the SKIM sends a CCD Bus message called a Seed Request to the engine controller then waits for PCM response If the PCM does not respond the SKIM will send the seed request agian After three failed attempts the SKIM will stop sending the seed request and store trouble code If the PCM sends a seed response the SKIM sends a valid invalid key message to the PCM This is an encrypted message that is generated using the following VIN Vehicle Identification Number See
111. temp normal operating temp normal Yes gt GoTo 12 No gt GoTo 11 With the DRB read the FREEZE FRAME window Use the freeze frame data and attempt to determine the cause In the FREEZE FRAME is the ENGINE RPM over 3000 and the operating temp normal Yes Lab scope cam and crank sensor check valve timing running vacuum test Perform VERIFICATION TEST VER 5A2 GoTo 14 102 DRIVEABILITY P 0300 MULTIPLE CYLINDER MIS FIRE Continued ACTION APPLICABILITY Engine Off Connect a suitable engine analyzer to the engine Allow the Engine to idle NOTE If the Engine will not idle maintain a constant RPM above idle NOTE Set the scope to read display or parade pattern Remove any spark plug wire Observe the Secondary KV Line Is the open secondary voltage at least 25 KV Yes gt GoTo 13 No Replace the Ignition Coil Perform VERIFICATION TEST VER 5A2 Engine Off Connect a suitable engine analyzer to the engine Allow the Engine to idle NOTE If the Engine will not idle maintain a constant RPM above idle NOTE Set the scope to read display or parade pattern Follow the equipment manufacturer s procedure for pattern analysis 15 the secondary ignition pattern OK Yes gt GoTo 14 No Repair the indicated component the Secondary Ignition Sys tem Perform VERIFICATION TEST VER 5A2 wheel and accessory drive belts Do any of the above causes exist Yes Repair as ne
112. the following 2000 Chrysler Caravan Voyager vehicles equipped with the 2 0L 2 4L DOHC 3 0L MPI 3 3L 3 8L MPI or 3 3L E85 compatible Engine 1 2 SIX STEP TROUBLESHOOTING PROCEDURE Diagnosis of the powertrain control PCM is done six basic steps e verification of complaint e verification of any related symptoms e symptom analysis e problem isolation module GENERAL INFORMATION e repair of isolated problem e verification of proper operation 2 0 IDENTIFICATION OF SYSTEM The Powertrain Control Module PCM monitors and controls e Fuel system e Ignition system e charging system e speed control system e cooling system 3 0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION 3 1 GENERAL DESCRIPTION These Sequential Fuel Injection SFI engine sys tems have the latest in technical advances The on board Euro Stage 111 On Board Diagnostic incor porated with the powertrain control module PCM are intended to assist the field technician in repair ing vehicle problems by the quickest means 3 2 FUNCTION OPERATION 3 2 1 FUEL CONTROL The PCM controls the air fuel ratio of the engine by varying fuel injector on time Mass air flow is calculated using the speed density method using engine speed manifold absolute pressure and air temperature change Different fuel calculation strategies are used de pendent on the operational state of the engine During crank mode a prime shot fuel pulse is delive
113. the A C Pressure Sensor voltage Is the A C Pressure Sensor voltage above 4 6 volts Yes gt GoTo 2 gt GoTo 7 Ignition Off Disconnect the A C Pressure Sensor Note Check connectors Clean repair as necessary Turn ignition on Using a Voltmeter measure voltage of the A C Pressure Signal Circuit to ground Is the voltage above 6 0 volts Yes gt Repair A C Pressure Sensor Signal shorted to voltage Perform Powertrain Verification Test VER 2A No gt GoTo 3 214 DRIVEABILITY P 1598 A C PRESSURE SENSOR VOLTS TOO HIGH Continued ACTION APPLICABILITY Ignition Off Disconnect the A C Pressure Sensor Note Check connectors Clean repair as necessary Connect a J umper Wire between the A C Pressure Sensor Signal Circuit and Sensor Ground Circuit Ignition on with engine not running With the DRB read the A C Pressure Sensor voltage 15 the voltage below 1 0 volt Yes gt Replace theA C Pressure Sensor Perform Powertrain Verification Test VER 2A gt GoTo 4 Ignition Off Disconnect the A C Sensor Electrical Connector Note Check connectors Clean repair as necessary Connect umper Wire between theA C Pressure Sensor Signal Circuit and Engine Ground Ignition on engine not running With the the DRB read the A C Pressure Sensor voltage 15 the voltage below 1 0 volt Yes Repair the open Sensor Ground Circuit Perform Powertrain Verification Test VER 2A No gt Go
114. the Camshaft Thrust Plate s attached Yes Replace the Camshaft Position Sensor Perform Powertrain Verification Test VER 5A No Repair or replace the Camshaft Thrust Plate s as necessary Perform Powertrain Verification Test VER 5A Start Engine At PCM backprobe CMP Sensor Signal Circuit with Oscilloscope s voltage measure ment lead While observing the Oscilloscope pattern wiggle CMP Sensor Circuit from Sensor to PCM Were any signals missing when the wiggle test was conducted Yes Note where wiggling the Wires caused a missing CMP Sensor Signal Repair Camshaft and Crankshaft Wiring Harness as necessary Perform Powertrain Verification Test VER 5A GoTo 7 192 APPLICABILITY ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV DRIVEABILITY P 1391 INTERMITTENT LOSS OF CMP OR CKP Continued Ignition Off At the CKP Sensor backprobe the CKP Sensor Signal Circuit with the Oscilloscope s voltage measurement lead Start the Engine and observe the CKP Sensor voltage pattern on the Oscilloscope Are any Crankshaft Position Sensor Signals m
115. the Fuel Pump Relay Wiggle the Wiring Harness from the Relay to the PCM Did the Fuel Pump Relay clicking stop or become erratic while wiggling the wires Yes Repair Circuit as necessary where wiggling caused the clicking to become erratic Perform Powertrain Verification Test VER 2A GoTo 3 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 2A No Complete 178 DRIVEABILITY P1282 FUEL PUMP RELAY CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Disconnect the Fuel Pump Relay Note Check connectors Clean repair as necessary Ignition On Engine Not Running Using a Voltmeter measure the Fused Ignition Switch Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 5 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the Fuel Pump Relay Note Check connectors Clean repair as necessary Using Ohmmeter measure across Terminals 85 and 86 of the Fuel Pump Relay for resistance Is the resistance between 50 and 90 ohms Yes gt GoTo 6 No Replace Fuel Pump Relay Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Disconnect the Fue
116. the IAC Motor is assumed to be defective Repair Replace the Idle Air Control Motor Perform Powertrain Verification Test VER 2A If there are no possible causes remaining replace PCM Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Inspect all Terminals Are there any Terminals damaged pushed out or miswired Yes gt Repair as necessary Perform Powertrain Verification Test VER 2A No GoTo 7 243 DRIVEABILITY Symptom CHECKING INTAKE AIR TEMPERATURE SENSOR POSSIBLE CAUSES INTAKE AIR TEMPERATURE SENSOR DEFECTIVE ACTION APPLICABILITY Ignition On Engine Not Running ENGINE 2 0L Do not allow more than 5 minutes delay between next 2 steps and 2 4L 1 4 DOHC With the DRB read the Intake Air Temperature Sensor and record the reading Turn Ignition off Remove the Sensor then proceed to next step Using a Temperature Probe quickly measure intake temperature inside IAT Sensor opening 15 the IAT Sensor within 12 degrees 10 degrees of the probe reading Yes Test Complete No Replace the Intake Air Temperature Sensor Perform Verification Test VER 2A 244 DRIVEABILITY Symptom CHECKING MAP SENSOR CALIBRATION POSSIBLE CAUSES MAP SENSOR DEFECTIVE ACTION APPLICABILITY Ignition Off All a Vacuum Gauge to
117. the IAT Signal Circuit and an engine ground Ignition on engine not running Read the Intake Air Temperature Sensor voltage 15 the voltage below 1 0 volt Yes gt GoTo 4 No Repair the open Sensor Ground Circuit Perform Powertrain Verification Test VER 5A 36 DRIVEABILITY P 0113 INTAKE AIR TEMPERATURE SENSOR VOLT HIGH Continued ACTION APPLICABILITY Ignition Off Disconnect the IAT Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Note Check Connectors clean repair as necessary With the Ohmmeter measurethe IAT Sensor Signal Circuit from the PCM tothelAT Connector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open IAT Sensor Signal Circuit Perform Powertrain Verification Test VER 5A Ignition off All If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Ignition on with engine not running Use the schematic as a guide and wiggle the Sensor Connector and Harness Monitor DRB display Was there any IAT Sensor voltage change Yes Repair the Harness or Connector that caused the voltage to change Perform Powertrain Verification Test VER 5A GoTo 7 Ignition off Using schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powert
118. the PCM can fine tune injector pulse width Fine tuning injector pulse width allows the PCM to achieve the lowest emission levels while maintain ing optimum fuel economy The engine start up crank engine warm up and wide open throttle modes are open loop modes Under most operating conditions closed loop modes occur with the engine at operating temperature IGNITION SWITCH ON ENGINE OFF MODE When the ignition switch activates the fuel injec tion system the following actions occur 1 The PCM determines atmospheric air pressure from the MAP sensor input to determine basic fuel strategy 2 The PCM monitors the engine coolant tempera ture sensor and throttle position sensor input The PCM modifies fuel strategy based on this input When the key is in the on position and the engine is not running zero rpm the auto shut down relay and fuel pump relay are not energized Therefore voltage is not supplied to the fuel pump ignition coil and fuel injectors Engine Start up Mode This is an open loop mode The following actions occur when the starter motor is engaged 1 The auto shutdown and fuel pump relays are energized the PCM does not receive the cam shaft and crankshaft signal within approxi mately one second these relays are de energized 2 The PCM energizes all fuel injectors until it determines crankshaft position from the cam shaft and crankshaft signals The PCM deter mines crankshaft position
119. this trouble code POSSIBLE CAUSES ENG VACUUM HOSES AND COMPONENTS LEAKS THROTTLE BODY DEFECTIVE THROTTLE PLATE LINKAGE NOT IN CORRECT POS IAC WIRING HARNESS INTERMITTENT DEFECT IAC WIRING HARNESS OBSERVABLE DEFECTIVE ACTION APPLICABILITY Ignition Off All Does the engine exhibit a start and stall condition Yes gt GoTo 2 No gt GoTo 4 Ignition Off Perform minimum air flow test that is described in the service information 15 the idle RPM within the range shown the chart Yes Test Complete No GoTo 3 180 DRIVEABILITY P 1294 TARGET IDLE NOT REACHED Continued ACTION APPLICABILITY Ignition off All Remove the Throttle Body per service information procedure Note Clean Throttle Body in a well ventilated area and wear rubber gloves While holding the Throttle open spray entire Throttle Body Bore with Mopar parts cleaner Using a soft scuff pad clean the Throttle Body Bore and Throttle Plate Using compressed air dry the Throttle Body and install Throttle Body on Manifold Reconnect IAC Motor Connector and reset the IAC Motor Steps with the Start engine and let idle With the DRB actuate the minimum air flow Is the idle RPM within the range shown in the chart Refer to the Service Information Yes Test Complete No Replace the Throttle Body Perform Powertrain Verification Test VER 5A Ignition Off Start engine allow engine idle to stabilize for 60 seconds With the
120. to crank normally There is a momentary lack of response when the throttle is opened This can occur at all vehicle speeds If it is se vere enough the engine may stall intake air temperature sensor idle air control valve Combined engine and transmission control module The engine has less than expected power with little or no increase in vehi cle speed when the throttle is opened Leak Detection Pump manifold absolute pressure sensor malfunction indicator lamp manifold tuning valve oxygen sensor Programmable Communication terface powertrain control module powertrain control module positive crankcase ventilation Peripheral Expansion Port There is significantly less fuel mile age than other vehicles of the same design and configuration The engine runs unevenly at idle and causes the engine to shake if it is severe enough The engine idle rpm may vary called hunting This condition may cause stalling if it is severe enough Sentry Key Immobilizer Module Sentry Key Immobilizer System The engine starts but immediately dies GENERAL INFORMATION surge TPS engine rpm fluctuation without cor TRS responding change in throttle posi vss tion sensor throttle position sensor 14 transmission range sensor vehicle speed sensor signal 7 0 DIAGNOSTIC INFORMATION AND PROCEDURES CHARGING Symptom P 0622 GENERATOR FIELD NOT SWITCHING PROPERLY E E When Monitored and Set Condi
121. voltage above 4 0 volts Yes gt GoTo 5 No gt GoTo 11 Ignition Off Disconnect the VSS Connector Note Check connectors Clean repair as necessary Connect a jumper wire from the Sensor Signal to the Sensor Ground Circuit Key On With the DRB read the VSS Signal While observing display tap other end of jumper to VSS Signal Circuit Does the display show more than 0 MPH Yes gt GoTo 6 No gt GoTo 8 154 APPLICABILITY ENGINE 2 0L 2 4L 1 4 DOHC and or ENGINE 3 0L V6 w o EATX ENGINE 2 0L 2 4L 1 4 DOHC and or ENGINE 3 0L V6 w o EATX ENGINE 2 0L 2 4L 1 4 DOHC and or ENGINE 3 0L V6 w o EATX ENGINE 2 0L 2 4L 1 4 DOHC and or ENGINE 3 0L V6 w o EATX ENGINE 2 0L 2 4L 1 4 DOHC and or ENGINE 3 0L V6 w o EATX DRIVEABILITY P 0500 NO VEHICLE SPEED SENSOR SIGNAL Continued APPLICABILITY Ignition Off ENGINE 2 0L Remove the Vehicle Speed Sensor Inspect the Speedometer Pinion Gear 2 4L 1 4 DOHC Is the Pinion Gear okay and or ENGINE 3 0L V6 w o EATX Yes gt GoTo 7 No Repair as necessary Perform Powertrain Verification Test VER 5A If there potential causes remaining the Vehicle Speed Sensor is assumed tobe ENGINE 2 0L defective 2 4L 1 4 DOHC View repair options and or ENGINE 3 0L V6 w o EATX Repair Replace the VSS Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Disconnect the VSS Conne
122. wiggled Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A No gt GoTo 7 Using the schematic as a guide inspect the Harness and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 33 DRIVEABILITY Symptom 0112 INTAKE AIR TEMP SENSOR VOLTAGE LOW ETE eee When Monitored and Set Condition P 0112 INTAKE AIR TEMP SENSOR VOLTAGE LOW When Monitored With the ignition on the engine running Set Condition Theintake air sensor circuit voltage at PCM cavity 37 goes below 51 volt POSSIBLE CAUSES IAT SEN WIRING HARNESS INTERMITTENT DEFECT IAT SEN WRING HARNESS OBSERVABLE DEFECT SENSOR SIGNAL CIRCUIT SHORT TO GROUND SENSOR SIGNAL CIRCUIT SHORT TO SENSOR GND CIRCUIT IAT SENSOR VOLTAGE GREATER THAN 4 0 VOLTS PCM DEFECTIVE IAT SENSOR APPLICABILITY Ignition On Engine Not Running All With the DRB read the Sensor voltage 15 the Sensor voltage below 0 5 volt Yes gt GoTo 2 gt GoTo 6 Ignition Off Disconnect the Sensor Connector Note Check connectors Clean repair as necessary Ignition On Engine Not Running With the read the IAT Sensor voltage Is the IAT Sensor voltage above 4 0 volts Yes Replace the Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 3 Ignition Off
123. within one engine revolution After the crankshaft position has been determined the PCM energizes the fuel injectors in sequence The PCM adjusts the in jector pulse width and synchronizes the fuel injectors by controlling the fuel injectors ground paths 3 Once the engine idles within 64 rpm of its target engine speed the PCM compares the current MAP sensor value with the value received dur ing the ignition switch on zero rpm mode A diagnostic trouble code is written to PCM mem ory if a minimum difference between the two values is not found Once the auto shutdown and fuel pump relays have been energized the PCM determines the fuel injector pulse width based on the following engine coolant temperature manifold absolute pressure intake air temperature engine revolutions throttle position The PCM determines the spark advance based on the following engine coolant temperature crankshaft position camshaft position intake air temperature manifold absolute pressure throttle position Engine Warm Up Mode This is an open mode The PCM adjusts injector pulse width and controls injector synchronization by controlling the fuel injectors ground paths The PCM adjusts igni tion timing and engineidle speed The PCM adjusts the idle speed by controlling the idle air control motor and spark advance Cruise or Idle Mode When the engine is at normal operating temperature this is a clo
124. 1 0 2 0 3 0 4 0 5 0 6 0 7 0 TABLE OF CONTENTS INTRODUCTION wie iu cencae bee ese eal ee ee are 1 11 SYSTEM COVERAGE an 1 12 SIX STEP TROUBLESHOOTING PROCEDURE 1 IDENTIFICATION OF 5 5 2 2 lt 5 2 1 SYSTEM DESCRIPTION AND FUNCTIONAL 1 3 1 GENERAL DESCRIPTION E 1 22 FUNCTON OPERATION ads 1 PUBL CONTROL 1 322 ON BOARD DIAGNOSICS sw 2 3 23 OTHER CONTROLS 4 324 OPERATING MODES beh eed 4 3 25 NON MONITORED CIRCUITS c60sexcvendebrevauduceae ees ou 5 326 SKIS OVERVIEW een 69000445 t 6590894 oo Hane 5 3 2 7 SKIM ON BOARD 2 gt 5 25 gt 5 55 5556 56555555 5 3 2 8 SKIS OPERATION 55 be 6 3 2 9 PROGRAMMING THE POWERTRAIN CONTROL MODULE 6 3 2 10 PROGRAMMING THE SENTRY KEY IMMOBILIZER MODULE 7 3 2 11 PROGRAMMING THE IGNITION KEYS TO THE SENTRY KEY IMMOBILIZER MODULE oo ce 7 33 DIAGNOSTIC TROUBLE 5 8 raw 7 3 3 1
125. 18GY RD 3 3L GNITION COIL 1 DRIVER IGNITION COIL PACK 4 K17 18DB TN 3 8L GNITION COIL NO 2 DRIVER N 3 31 3 81 4 18 18RD YL 3 3L GNITION COIL 3 DRIVER U T S INSTRUMENT CLUSTER BLACK 13 WAY BLACK CAV CIRCUIT FUNCTION 1 2 20 FUSED 1 1 3 4 6 1 o o 6 200R PANEL LAMPS FEED 13 7 7 72 GROUND U 8 9 02 20WT BK CCD BUS INSTRUMENT 10 D1 20VT BR CCD BUS 11 Fit 20RD WT FUSED IGNITION SWITCH OUTPUT ST RUN OFF CLUSTER 12 z 13 71 20BK GROUND 341 CONNECTOR PINOUTS GRAY INTAKE AIR TEMPERATURE MANIFOLD ABSOLUTE PRESSURE SENSOR 2 0L INTAKE AIR TEMPERATURE SENSOR 2 4L R KNOCK SENSOR 4 2 LEAK DETECTION PUMP LT GRAY s INTAKE AIR TEMPERATURE MANIFOLD ABSOLUTE PRESSURE SENSOR 2 0L GRAY 4 WAY CAV CIRCUIT FUNCTION A K4 18BK LB SENSOR GROUND B 21 18BK RD INTAKE AIR TEMPERATURE SIGNAL 18VT WT 5V SUPPLY D K1 18DG RD MAP SENSOR SIGNAL INTAKE AIR TEMPERATURE SENSOR 2 4L GRAY 2 WAY CAV CIRCUIT FUNCTION 1 K4 18BK LB SENSOR GROUND 2 21 18BK RD INTAKE AIR TEMPERATURE SIGNAL KNOCK SENSOR GRAY 2 WAY CAV CIRCUIT FUNCTION 1 42 18DB LG KNOCK SENSOR SIGNAL 2 K4 18BK LB SENSOR GROUND LEAK DETECTION PUMP LT GRAY 4 WAY CAV CIRCUIT FUNCTION 1 2 F87
126. 298 STARTING NO CRANK CONDITION Continued APPLICABILITY Ignition Off Disconnect Starter Relay Output Wire from the Starter Solenoid Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary Using an ohmmeter measure Starter Relay Output Circuit Is the resistance below 5 0 ohms Yes gt GoTo 19 No Repair open Starter Relay Output Circuit Perform Powertrain Verification Test VER 1A Ignition Off Check the Battery Cables for high resistance Use Service Manual procedure Did either Battery Circuit have a voltage drop greater than 0 2 volt Yes Repair the Battery Circuit for high resistance Perform Powertrain Verification Test VER 1A No GoTo 16 Ignition Off All Attempt to manually rotate the Crankshaft 360 degrees 15 the Crankshaft able to rotate 360 degrees Yes gt GoTo 17 No Repair the Engine mechanical problem as necessary Perform Powertrain Verification Test VER 1A Ignition Off Disconnect Starter Relay Output Wire from the Starter Solenoid Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary Using an ohmmeter measure Starter Relay Output Circuit Is the resistance below 5 0 ohms Yes gt GoTo 18 No Repair open Starter Relay Output Circuit Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Starter Relay Connector Note Check connectors Clean repair
127. 37 1 2 O2 SENSOR VOLTAGE SHORTED TO GROUND When Monitored With theignition key off after the O2 Sensor cools down and after the next key on provided that it is a cold start coolant temperature less than 38 degrees C 100 4 degrees F and ambient temperature within 13 7 degrees C 7 2 degrees F of coolant temperature Set Condition Downstream O2 Sensor Signal voltage is below 0 156 volt prior to 02 Sensor H eater test cool down period and O2 voltage less than 0 156 volt after the key on in the subsequent start POSSIBLE CAUSES 1 2 02 SENSOR VOLTAGE LOW 1 2 025 SIGNAL CIRCUIT SHORT TO GROUND 1 2 025 SIGNAL SHORT TO GROUND CIRCUIT 1 2 2 SENSOR DEFECTIVE PCM DEFECTIVE 1 2 O2S ACTION APPLICABILITY Ignition Off All Turn ignition on With the DRB monitor the Downstream O2 Sensor voltage for a few minutes Wait three minutes or until the voltage stabilizes between 0 4 and 0 6 volt With the DRB monitor the Downstream O2 Sensor voltage 15 the Downstream O2 Sensor voltage below 0 156 volt Yes gt GoTo 2 No The condition required to set this trouble code is not present at this time Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Key on With the DRB monitor the Downstream O2 Sensor voltage 15 the Downstream O2 Sensor voltage below 0 156 volts Yes gt GoTo 3 No Replace the Dow
128. 4 No Repair the Vacuum Supply to the EGR Solenoid Perform VERIFICATION TEST VER 5A3 Engine still running Reconnect the Vacuum Hose to the EGR Solenoid Disconnect the vacuum hose to the EGR Valve Connect a vacuum gauge to the disconnected hose Does the gauge pulsate Yes gt GoTo 5 No gt GoTo 7 While observing gauge momentarily raise engine speed above 2000 rpm Did vacuum stabilize Yes gt GoTo 6 No Replace EGR Valve Assembly Perform VERIFICATION TEST VER 5A3 Check for sizeable exhaust leak Were any leaks found Yes gt Repair as necessary Perform VERIFICATION TEST VER 5A3 No gt GoTo 8 Engine Running Disconnect Back Pressure Hose from Transducer Connect a pressure gauge to the Back Pressure Hose 15 pressure gauge pulsating Yes Replace EGR Assembly Perform VERIFICATION TEST VER 5A3 No GoTo 9 Check EGR Back Mount Check Valve tightness Check EGR Valve Gasket Were any problems found Yes Repair or replace as necessary Perform VERIFICATION TEST VER 5A3 No Replace EGR Valve Assembly Perform VERIFICATION TEST VER 5A3 Remove the EGR Valve and inspect manifold and tube for restrictions All Were any restrictions found Yes Repair or replace as necessary Perform VERIFICATION TEST VER 5A3 No Replace EGR Valve Assembly Perform VERIFICATION TEST VER 5A3 132 DRIVEABILITY Symptom P 0403 EGR SOLENOID CIRCUIT When Monitored and Set Cond
129. 4 22 20BK LG GROUND 5 711 20 GROUND 6 1020 2010 SCI RECEIVE 7 1021 20PK SCI TRANSMIT 8 9 10 11 02 20WT BK CCD BUS 12 13 14 06 20PK LB SCI RECEIVE 15 16 M1 20PK FUSED B EGR SOLENOID GRAY 2 WAY CAV CIRCUIT FUNCTION 1 K35 18GY YL EGR SOLENOID CONTROL 2 F87 18WT BK FUSED IGNITION SWITCH OUTPUT ST RUN ENGINE COOLANT TEMPERATURE SENSOR BLACK 2 WAY CAV CIRCUIT FUNCTION 1 18BK LB SENSOR GROUND 2 18TN BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL ENGINE OIL PRESSURE SWITCH GREEN 2 WAY CAV CIRCUIT FUNCTION G6 16GY ENGINE OIL PRESSURE SWITCH SENSE 336 CONNECTOR PINOUTS EVAP PURGE SOLENOID BLACK 2 WAY CAV CIRCUIT FUNCTION 1 52 18PK BK PROPORTIONAL PURGE SOLENOID CONTROL 2 K70 18VT RD PWM PURGE SENSE EVAP PURGE SOLENOID DUTY CYCLE EVAP PURGE SOLENOID CAV CIRCUIT FUNCTION 1 EVAPORATIVE EMISSION SOLENOID CONTROL 2 EVAPORATIVE SOLENOID SENSE R 4 2 BLACK FUEL INJECTOR NO 1 2 0L 2 4L BLACK 2 WAY CAV CIRCUIT FUNCTION 1 11 18WT DB FUEL INJECTOR NO 1 DRIVER 2 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT FUEL INJECTOR NO 1 2 0L 2 4L 337 R le 2 CONNECTOR PINOUTS
130. 43 18BK LB SENSOR GROUND 44 K7 180R 8V SUPPLY 45 46 14 18RD WT FUSED 47 48 K40 18BR WT IDLE AIR CONTROL NO 3 DRIVER 49 18L BK IDLE AIR CONTROL NO 2 DRIVER 50 712 18BK TN GROUND 51 K141 18TN WT OXYGEN SENSOR 1 2 SIGNAL 52 53 54 55 56 V36 18TN RD EXCEPT SPEED CONTROL VACUUM SOLENOID CONTROL 3 0L 57 K39 18GY RD IDLE AIR CONTROL NO 1 DRIVER 58 59 18VT BK IDLE AIR CONTROL NO 4 DRIVER 59 1 CCD BUS 60 02 18WT BK CCD BUS 61 18VT WT 5V SUPPLY 62 K29 18WT PK BRAKE SWITCH SENSE 63 10 18YL DG EATX TORQUE MANAGEMENT REQUEST SENSE 64 13 18DB OR AIC COMPRESSOR CLUTCH RELAY CONTROL 65 21 18PK SCI TRANSMIT 66 07 18WT OR VEHICLE SPEED SENSOR SIGNAL 67 K51 18DB YL AUTOMATIC SHUT DOWN RELAY CONTROL 68 52 18PK BK DUTY CYCLE EVAP PURGE SOLENOID CONTROL 69 70 K7018VT RD EXCEPT PULSE WIDTH MODULATED PURGE SENSE 3 0L 71 72 K107 18DB WT 3 31 3 81 LEAK DETECTION PUMP SWITCH SENSE 72 K107 18YL BK 2 4L ATX LEAK DETECTION PUMP SWITCH SENSE 73 K173 14LG DB RADIATOR FAN RELAY CONTROL 74 K31 18BR FUEL PUMP RELAY CONTROL 75 0201816 SCI RECEIVE 76 41 18BK WT 2 4L ATX TRS 41 SENSE 76 141 18BR YL EATX TRS T41 SENSE 77 K106 18WT DG EXCEPT LEAK DETECTION PUMP SOLENOID CONTROL 3 0L 78 54 18OR BK 2 4L ATX TORQUE CONVERTER CLUTCH SOLENOID CONTROL 78 736 18TN RD 3 01 SPEE
131. 4A 258 SPEED CONTROL P 1595 SPEED CONTROL SOLENOID CIRCUITS Continued APPLICABILITY Ignition Off Disconnect the Speed Control Servo 4 Way Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the S C Brake Switch Output Circuit from the Servo Connector to ground Is the resistance below 5 0 ohms Yes Repair shorted S C Brake Switch Output Circuit Perform Verification TEST VER 4A GoTo 12 Ignition Off Disconnect the Speed Control Servo 4 Way Connector Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the resistance of the S C Brake Switch Output Circuit Is the resistance below 5 0 ohms Yes gt GoTo 13 No Repair the open S C Brake Switch Output Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the S C Brake Switch Output Circuit from the Brake Switch Connector to ground Is the resistance below 5 0 ohms Yes Repair shorted S C Brake Switch Output Circuit Perform Verification TEST VER 4A GoTo 15 Ignition off Disconnect the Powertrain Control Module Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary With an ohmmeter test resistance of the Speed Con
132. 5A No Test Complete 41 DRIVEABILITY Symptom P 0121 TPS VOLTAGE DOES NOT AGREE WITH MAP IE When Monitored and Set Condition P 0121 TPS VOLTAGE DOES NOT AGREE WITH MAP When Monitored With the engine running and no MAP sensor or TP sensor trouble codes Set Condition PCM 2 tests TPS High Voltage Test gt engine speed low manifold high throttle plate nearly closed TPS output low Low Voltage Test gt road load speed gt 40 kph gt 25mph vacuum low throttle plate open TPS signal high If improper TPS voltage code in 7sec POSSIBLE CAUSES MAP SENSOR TROUBLE CODE PRESENT TPS 5 VOLT SUPPLY CIRCUIT OPEN TPS CONN amp TERM CORR DAM PUSHED OUT OR MISWIRED TPS HARNESS OR CONNECTORS INTERMITTENT DEFECT TPS VOLTAGE ABOVE 1 0 VOLT TPS VOLTAGE ABOVE 3 5 VOLTS TPS VOLTAGE CHANGE NOT SMOOTH ACTION APPLICABILITY Ignition On Engine Not Running All Using the DRB read trouble codes Is the Vehicle Speed Sensor Signal trouble code present Yes Refer to symptom P 0500 NO VEHICLE SPEED SENSOR SIG NAL in the DRIVEABILITY category gt GoTo 2 Ignition On Engine Not Running Using the DRB read trouble codes Is a MAP Sensor trouble code present Yes Refer to Symptom List for problems related to Driveability gt GoTo 3 Ignition On Engine Not Running With the DRB read the MAP Sensor voltage Is MAP Sensor voltage below 3 5 volts Yes Refer to symptom CHEC
133. 6 and or EN GINE 3 8L V6 ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 DRIVEABILITY P 0500 NO VEHICLE SPEED SENSOR SIGNAL Continued ACTION Ignition off Disconnect the Transmission Control Module Disconnect the Output Speed Sensor Note Check connectors Clean repair as necessary Using Ohmmeter measure the Output Speed Sensor OSS from the TCM the OSS 15 the resistance under 5 0 ohms Yes gt GoTo 24 No Repair the open Output Speed Sensor Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the Output Speed Sensor is assumed to be defective View repair options Repair Replace the Output Speed Sensor Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Transmission Control Module Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using an Ohmmeter measure between the VSS Signal Circuit and ground Is the resistance below 5 0 ohms Yes Repair the Vehicle Speed Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 26 Ignition off Disconnect the Transmission Control Module Disconnect the Powertrain Control Module Note Check connectors Clea
134. 69 fuel release hose C 4799 1 flow fitting 6457 jumper wires ohmmeter oscilloscope vacuum gauge voltmeter 12 volt test light minimum 25 ohms resistance with probe 8382 CAUTION A 12 VOLT TEST LIGHT SHOULD NOT BE USED FOR THE FOLLOWING CIRCUITS DAMAGE TO THE POWERTRAIN CONTROLLER WILL OCCUR 5 Volt Supply 8 Volt Supply e 1850 PCI Bus e CCD Bus e CKP Sensor Signal e CMP Sensor Signal e Vehicle Speed Sensor Signal e O2 Sensor Signal 6 0 GLOSSARY OF TERMS ABS antilock brake system backfire fuel ignites in either the intake or popback the exhaust system CKP crank position sensor CMP camshaft position sensor cuts out Steady pulsation or the inability of misses the engine to maintain a consistent rpm GENERAL INFORMATION DLC detona tion spark knock ECT EGR genera tor hard start hesita tion sag stumble IAT IAC TEC lack of power sluggish LDP MAP MIL MTV 025 rough unstable or er ratic idle stalling SKIM SKIS start and stall data link connector previously called engine diagnostic connector a mild to severe ping especially un der loaded engine conditions engine coolant temperature sensor exhaust gas recirculation valve and system previously called alternator The engine takes longer than usual to start even though it is able
135. 8382 on the Gas Cap and on the vehicle Attach the supply hose from 6872A to 8382 Attach the power source from the 6872A dip to Battery and ground clip to Battery On the 6872A set the Pressure Hold Valve to Open and set the Vent Valve to Closed Turn the timer on and watch the gauge When the gauge pressure reaches 14 in H2O turn the Pressure Hold Valve to Closed Turn the timer off Note the time and pressure Did pressure drop more than 6 in H2O to 8 inches 20 on the gauge two minutes Yes gt GoTo 4 No gt GoTo 5 141 DRIVEABILITY P 0442 EVAP LEAK MONITOR SMALL LEAK DETECTED Continued ACTION APPLICABILITY continue testing you will need Miller Tool Kit 6872 8382 and 6904 Ultrasonic All Leak Detector NOTE The Fuel Tank must have 1 2 tank of fuel to perform this test Perform Evaporative System Pressure Pump Self Test that is specified on the tester cover Warning Verify the vehicle fuel tank contains at least 3 gallons of fuel Attach the 111 to the vehicle Turn the Key On At ENGINE SYSTEM TESTS select LEAK DETECTION PUMP TEST Read instructions and then press ENTER At LEAK DETECTION PUMP TEST select 3 HOLD PSI At the vacuum hose going tothe LDP attach and apply a continuous vacuum i e 20 Remove Gas Install 8382 on the Gas Cap and on the vehicle Attach the supply hose from 6872A to 8382 Attach the power source from the 6872A dip to B
136. ASD Relay Output Circuit for resistance to ground at the Relay Is the resistance below 5 0 ohms Yes gt GoTo 32 No Repair open ASD Relay Output Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the ASD Relay 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE With a Voltmeter measure the F used Circuit cavity in ASD Relay Connector 3 3L V6 and or EN Is the Voltage above 10 volts GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Replace the Auto Shutdown Relay Perform Verification Test VER 1A Repair open Fused Perform Verification TEST VER 1A 295 STARTING Symptom NO CRANK CONDITION POSSIBLE CAUSES BATTERY CIRCUIT RESISTANCE TOO HIGH FUSED B CIRCUIT OPEN STARTER RELAY CONTROL CIRCUIT OPEN STARTER RELAY OUTPUT CIRCUIT OPEN CRANKSHAFT NOT ABLE TO ROTATE STARTER MOTOR DEFECTIVE PCM DEFECTIVE NO CRANK CONDITION STARTER RELAY DEFECTIVE RESISTANCE lt 100 OHMS STARTER RELAY DEFECTIVE RESISTANCE ABOVE 100 OHMS IGNITION SWITCH OUTPUT CIRCUIT OPEN PARK NEUTRAL SWITCH DEFECTIVE ACTION APPLICABILITY Note Ensure the SKIM has proper communication and that there are no All SKIM DTC s present before continuing Ignition Off Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary Warning The Transmission must be in Park and the Parking Brake must be on for the next step
137. ATTERY 02 SENSOR TO STARTER RELAY IN SMART START SPEED CONTROL 2 gt SWITCH 2 ELECTRONIC IGNITION TO SPEED care Ho S 2 Block ti CLUTCH NEOR BLOCK is CLUTCH RELAY FUSE IN PDC O Hil INJECTOR 2 SPARK PLUGS ig 5 La 5 0 SENSOR POSITIVE KNOCK SENSOR BK TEMPERATURE COEFFICIENT RECTIFIER i TP SENSOR Tercer L GENERATOR tL SOLENOID JUNCTION 4 VEHICLE FUSED IGN SPEED SENSOR IGN SWITCH POSITIVE SENSOR TEMPERATURE COEFFICIENT TO RAD PUMPSOLENOID SLD SATE FAN FUSE RAD FAN IN PDC IF EQUIPPED TO DATA RELAY LINK TO BRAKE CONNECTOR SWITCH EN KKK i mAAAAA 80a6835e 355 SCHEMATICS 10 2 2000 GS 3 0L ENGINE TO EATX ENGINE FUSE PNP SWITCH TO CONTROLLER FUEL SHUTDOWN PUMP RELAY U UPSTREAM O FUEL PUMP m FUEL PUMP D FUSE TO BATTERY DOWNSTREAM TO STARTER RELAY IN PDC 02 SENSOR SMART START SPEED CONTROL J SERVO TO gt IGNITION COIL SWITCH Z 62 INJECTOR 5 4 TOTCM gt INJECTOR 85 NETOA 8 SWITCH E JUNCTION 20 INJECTOR 2 BLOCK AG CLUTCH CRUTCH RELAY FUSE IN PDC 054 INJECTOR FA TO lt IGN 44 SWITCH O SENSOR iw POSITIVE TEMPERATURE COEFFICIENT GENERA
138. AY HORN RELAY PARK q LANP RELAY HIGH ie BEAM RELAY LOW 4 BEAM RELAY R 4 2 R 2 CONNECTOR PINOUTS FUSES FUSE AMPS FUSED CIRCUIT FEED CIRCUIT NO 1 15A INTERNAL 0 6RD 2 20A GAS EATX INTERNAL 0 6RD 3 20 INTERNAL 0 6RD 4 10 INTERNAL 0 6RD 5 10 INTERNAL 0 6RD 6 F41 20PK VT 0 6RD 7 20A INTERNAL 0 6RD 8 20 L43 18VT INTERNAL 9 15 L44 20VT RD INTERNAL 10 25 20 12RD DB 0 6RD 11 20A F32 18PK DB 0 6RD 12 10A A22 12BK OR F23 18DB YL 13 10A F14 18LG YL INTERNAL 14 20A L9 18BK VT 0 6RD 15 10A M1 20PK A0 6RD 16 SPARE 0 6RD 17 SPARE 0 6RD 18 10A L33 20RD INTERNAL 19 10A L34 20RD OR 0 6RD 19 10A L34 20RD OR A0 6RD 101 40A INTERNAL 0 6RD 102 40A 10 1280 00 0 6RD 103 40A 2 12PK BK 0 6RD 104 40A 12RD 0 6RD 105 40A DIESEL 17 12RD BK 0 6RD 106 40A 16 12GY 6RD 107 40A INTERNAL 0 6RD 108 40A 4 12BK RD 0 6RD 109 30A INTERNAL 0 6RD A C COMPRESSOR CLUTCH RELAY CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 C13 18DB OR COMPRESSOR CLUTCH RELAY CONTROL GAS 85 C13 20DB OR COMPRESSOR CLUTCH RELAY CONTROL DIESEL
139. After the sixth attempt the PCM disables the starter relay until the fault is corrected 3 2 9 PROGRAMMING THE POWERTRAIN CONTROL MODULE Important Note Before replacing the PCM for failed driver control circuit or ground circuit be sure to check the related component circuit integ rity for failures not detected due to a double fault in the circuit Most PCM driver control circuit failures are caused by internal failure to components i e 12 volt pull ups drivers and ground sensors These failures are difficult to detect when a double fault has occurred and only one DTC has set NOTE IF THE PCM AND THE SKIM ARE REPLACED AT THE SAME TIME PROGRAM THE VIN INTO THE PCM FIRST ALL VEHICLE KEYS WILL THEN NEED TO BE REPLACED AND PROGRAMMED TO THE NEW SKIM The SKIS Secret Key is an ID code that is unique to each SKIS This code is programmed and stored in the SKIM engine controller and transpon der ship ignition key When replacing the PCM it is necessary to program the secret key into the PCM Turn the ignition on transmission park neutral 2 Use the DRB and select THEFT ALARM SKIM then MISCELLANEOUS 3 Select PCM REPLACED 4 Enter secured access mode by entering the vehi cle four digit PIN NOTE IF THREE ATTEMPTS ARE MADE TO ENTER THE SECURE ACCESS MODE USING AN INCORRECT PIN SECURED ACCESS MODE WILL BE LOCKED OUT FOR ONE HOUR TO EXIT THIS LOCKOUT MODE TURN THE IGNITION TO THE
140. B actuate Ignition Coil 2 With a Voltmeter measure the ASD Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 3 No Repair the open ASD Output Circuit Perform Powertrain Verification Test VER 2A 125 DRIVEABILITY P 0352 IGNITION COIL 2 PRIMARY CIRCUIT Continued APPLICABILITY Ignition Off Disconnect the Coil Connector Note Check connectors Clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 2A No gt GoTo 4 Ignition Off Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure the Ignition Coil 2 Primary Circuit for resistance Is the resistance below 2 0 ohms Yes gt GoTo 5 No Replace the Ignition Coil Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the I gnition Coil Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary With Ohmmeter measure the resistance of the Coil Driver 2 Circuit to ground at the PCM Connector 15 the resistance below 5 0 ohms Yes Repair the Ignition Coil 2 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 2A No GoTo 6 Ignition Off Disconnect the Powertrain Control Modu
141. BILITY 0171 1 1 FUEL SYSTEM LEAN Continued APPLICABILITY Ignition On Engine Not Running With the DRB read TPS Sensor voltage Throttle must be against stop Is the voltage 0 92 or less with the Throttle closed Yes gt GoTo 4 Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A Turn ignition On With the DRB in sensors read the Engine Coolant Tmp Deg value Note If engine coolant temperature is above 82 C 180 F allow the engine to cool until 62 C 150 F is reached Start the Engine While monitoring the DRB allow the engine to reach normal operating temperature above 82 C 180 F Did the engine coolant temperature value reach 82 180 or above Yes gt GoTo 5 No Replace the Engine Coolant Temperature Sensor Perform Powertrain Verification Test VER 5A Start the Engine While monitoring the DRB allow the engine to reach normal operating temperature above 82 C 180 F Was the coolant temperature value increase a smooth transition Yes gt GoTo 6 No Replace the Engine Coolant Temperature Sensor Perform Verificatino Test VER 5A Turn ignition off Connect a Vacuum Gauge to a Manifold Vacuum source Start the engine Allow the engine to idle Note If engine will not idle maintain a constant RPM above idle Using the DRB in Sensors read the MAP Sensor vacuum value 15 the DRB reading within 1 of the Vacu
142. BILITY If there are no potential causes remaining the Downstream O2 Sensor is assumed to be defective View repair options Repair Replace the U pstream O2 Sensor Perform Powertrain Verification Test VER 5A Start the engine Wiggle Downstream O2 Sensor Connector and Harness While wiggling the Harness watch the Downstream O2 Sensor voltage Did the O2 Sensor voltage go above 1 2 volts at any time Yes Repair the Harness or Connector that has the intermittent short to voltage Perform Powertrain Verification Test VER 5A GoTo 6 Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 7 Ignition Off Disconnect the Downstream O2 Sensor Note Check connectors Clean repair as necessary Inspect connectors Is any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors 67 DRIVEABILITY Symptom P 0139 1 2 O2S SLOW RESPONSE When Monitored and Set Condition P 0139 1 2 O2S SLOW RESPONSE When Monitored With the engine running engine at normal operating temperature ambient air temperature greater than 7 20 F and vehicle odometer is greater than 6437 Kilometers 4000 miles Set Condition Oxygen Sensor Signal volta
143. BLACK 4 WAY 344 PARK NEUTRAL POSITION SWITCH BLACK 344 ao ee ee ee 346 AIG COMPRESSOR CLUTCH RELAY cleo ibe de hehe oS Sooo 346 AUTOMATIC SHUT DOWN RELAY 5 346 CIGAR LIGHTER ACCESSORY RELAY ous 346 DIESEL POWER RELAY amp 347 10 0 TABLE OF CONTENTS Continued ENGINE STARTER MOTOR RELAY 2 25552555555 te 347 FRONT BLOWER MOTOR RELAY 347 FUEL HEATER RELAY DIESEL duis 347 FUEL PUMP RELAY GAS woe 347 AIGH BEAM RELAY 3854 pereat g Eba tig Roret 347 HORN RELAY RARE 347 LOW BEAM RELAY bk he be 348 PARK LAMP RELAY ia pee aba cae pee Ose 348 TRANSMISSION CONTROL RELAY EATX se 348 WIPER 8 5 348 WIPER a Sense Keds exe 348 POWERTRAIN CONTROL M
144. C Driver 2 Circuit Was the voltage over 5 0 volts at any time Yes gt GoTo 9 No Refer to symptom P 0505C IDLE AIR CONTROL MOTOR CIR CUIT in the DRIVEABILITY category Ignition Off Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure between IAC 1 Driver and ground Is the resistance below 5 0 ohms Yes Repair the IAC 1 Driver Circuit shorted to ground Perform Powertrain Verification Test VER 5A gt GoTo 10 Start engine and let idle Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using a Voltmeter measure the IAC Driver 8 Circuit Was the voltage over 5 0 volts at any time Yes gt GoTo 12 No Refer to symptom P 0505D IDLE AIR CONTROL MOTOR CIR CUIT in the DRIVEABILITY category Ignition Off Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure between IAC 8 Driver and ground Is the resistance below 5 0 ohms Yes Repair the IAC 8 Driver Circuit shorted to ground Perform Powertrain Verification Test VER 5A GoTo 13 Ignition Off All Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure between IAC 2 Driver and Is the resistance below 5 0 ohms Yes Repair the IAC 2 Driver Circuit shorted to ground Perform Powertrain Ve
145. CC Solenoid Control Circuit at the PCM connector Is the voltage above 10 0 volts Yes gt GoTo 4 No Replace the TCC Solenoid Perform Powertrain Verification Test VER 5A Ignition Off TRANSMISSION Disconnect the Powertrain Control Module Connector AUTOMATIC Disconnect the TCC Solenoid Connector 3 SPD 31TH Note Check connectors Clean repair as necessary Using an Ohmmeter measure the TCC Solenoid Control Circuit from the TCC Solenoid Connector to the PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open TCC Solenoid Control Circuit Perform Powertrain Verification Test VER 5A Ignition Off TRANSMISSION Disconnect the Powertrain Control Module Connector AUTOMATIC Disconnect the TCC Solenoid Connector 3 SPD 31TH Note Check connectors Clean repair as necessary With the DRB in ohmmeter mode measure between the TCC Solenoid Control Circuit and ground 15 the resistance below 5 0 ohms Yes Repair the TCC Solenoid Control Circuit short to ground Perform Powertrain Verification Test VER 5A No gt GoTo 6 If there are no potential causes remaining the PCM is assumed to be defective TRANSMISSION View repair options AUTOMATIC 3 SPD 31TH Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running TRANSMISSION With the DRB erase codes AUTOMATIC Turn ignition off for 10 seconds then turn ignit
146. CHANICAL SYSTEMS CHECKING EVAP EMISSION SYSTEM CHECKING EGR SYSTEM CHECKING IAT SENSOR CHECKING PNP SWITCH CHECKING THE 5 VOLT SUPPLY CIRCUIT CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION GENERAL INFORMATION LACK OF POWER SLUGGISH SPARK KNOCK DETONATION CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING EVAP EMISSION SYSTEM CHECKING THE 5 VOLT SUPPLY CIRCUIT CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING EGR SYSTEM CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION GENERAL INFORMATION CUTS OUT MISSES BACKFIRE POPBACK RUNS ROUGH UNSTABLE ERRATIC IDLE CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKIN
147. CIRCUIT OPEN 1 1 2 SENSOR WIRING HARN INTER DEFECT 1 1 2 SENSOR WIRING HARN OBS DEFECT 02 SENSOR 1 1 DEFECTIVE PCM DEFECTIVE APPLICABILITY Ignition Off All Start the engine and allow it to reach normal operating temperature With the DRB in actuator tests set RPM to 1500 In sensors read the Upstream Oxygen Sensor State Is the Upstream O2 Sensor level switching Yes gt GoTo 2 gt GoTo 4 Ignition Off Start the engine and allow it to reach normal operating temperature Using the DRB set the engine speed to 1500 RPM With the DRB read the Upstream O2 Sensor level Wiggle Upstream O2 Sensor Connector and Harness While wiggling the Harness monitor the DRB display At any time was the Upstream O2 Sensor state locked at center Yes Repair the open Harness or Connector that caused the O2 Sensor state to stay at center Perform Powertrain Verification Test VER 5A No gt GoTo 3 60 DRIVEABILITY 0134 1 1 O2 SENSOR STAYS AT CENTER Continued ACTION APPLICABILITY Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition Off Disconnect the U pstream O2 Sensor Connector Note Check connectors Clean repair as necessary Ignition on engine not running Using an Ohmmeter measure the resistance between the Upstream O2 Se
148. CIRCUIT OPEN PCM CONN IAC 4 TERM DAMAGED PUSH OUT OR MISWIRED PCM DEF 4 ACTION APPLICABILITY Ignition Off All Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Visually inspect Connector 15 any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 2 Ignition Off Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure resistance of the 4 Driver Circuit from the IAC Motor Connector to the PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 3 No Repair the open IAC Motor Driver Control Circuit Perform Powertrain Verification Test VER 5A Ignition off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 167 DRIVEABILITY Symptom P 0600 PCM FAILURE SPI COMMUNICATIONS EEEE When Monitored and Set Condition P 0600 PCM FAILURE SPI COMMUNICATIONS When Monitored With the ignition key on Set Condition Internal Bus Communication failure between processors POSSIBLE CAUSES PCM FAILURE SPI COMMUNICATIONS ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read Trouble Codes Is Trouble Code PCM FAILURE SPI COMMUNICATION prese
149. CKING THE ENGINE MECHANICAL SYSTEMS in the DRIVEABILITY category Ignition Off Install a Fuel Pressure Gauge to the Fuel Line Use special tools if necessary Turn ignition on With the DRB actuate the ASD Fuel System Test Allow Fuel Pressure to stabilize With the DRB stop Fuel System Test Monitor the Pressure Gauge for 1 minute 15 the Fuel Pressure below 10 psi Yes If Fuel Pump and Lines OK replace leaking njector s as necessary Perform Powertrain Verification Test VER 2A GoTo 10 235 DRIVEABILITY CHECKING FOR OXYGEN SENSOR SWITCHING Continued APPLICABILITY Ignition Off All Inspect the Air Filter and Inlet Ducts for restriction s Were there any restrictions Yes Repair or replace the Air Inlet System as necessary Perform Powertrain Verification Test VER 2A No Refer to symptom CHECKING THE ENGINE MECHANICAL SYSTEMS in the DRIVEABILITY category 236 DRIVEABILITY Symptom CHECKING FUEL DELIVERY POSSIBLE CAUSES FUEL LINE RESTRICTED FUEL FILTER DEFECTIVE FUEL LINE RESTRICTED FUEL PRESSURE REGULATOR DEFECTIVE FUEL PUMP REGULATOR ASSEMBLY DEFECTIVE FUEL RETURN LINE DEFECTIVE FUEL PUMP REGULATOR ASSEMBLY DEFECTIVE APPLICABILITY Ignition Off ENGINE 2 4L 1 4 Warning The Fuel System must be opened and may be under high pressure DOHC and or EN Release the Fuel Pressure GINE 3 3L V6 Connect a Fuel Pressure Gauge to test port an
150. CMP and CKP states Did only the CMP state change while cranking engine Yes gt GoTo 6 No gt GoTo 3 108 DRIVEABILITY P 0320 NO CRANK REFERENCE SIGNAL AT PCM Continued ACTION APPLICABILITY Cycle the ignition off then on Attempt to start engine With the DRB in Input Output display read the current CMP and CKP states Did only the CKP state change Yes Refer to symptom 0340 CAM SIGNAL AT PCM the DRIVEABILITY category No gt GoTo 4 Start the engine Wiggle the Wiring Harness from CMP and CKP Sensors to the Powertrain Control Module Did the engine miss or die out when wiggling Wires Yes Repair Circuit as necessary where wiggling caused the engine to miss or die out Perform Powertrain Verification Test VER 2A GoTo 5 Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A Test Complete Ignition Off Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary Turn ignition on Using a voltmeter measure voltage from the 8 Volt Supply Circuit Is the voltage above 7 0 volts Yes gt GoTo 7 No GoTo 15 Ignition Off Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Sensor Ground Circuit for resist
151. CT CKP SENSOR CONNECTOR OBSERVABLE DEFECT CKP SENSOR DEFECTIVE CKP SENSOR DEFECTIVE CKP SENSOR NOT PROPERLY INSTALLED CKP SENSOR NOT PROPERLY INSTALLED NOTCHES IN CRANKSHAFT DEFECTIVE SLOTS IN FLEXPLATE DEFECTIVE APPLICABILITY Ignition Off ENGINE 3 0L V6 Disconnect the Crankshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 and or EN Inspect all Terminals GINE 3 8L V6 Is any Terminal damaged pushed out or miswired and or ENGINE 3 3L V6 FFV Yes Repair as necessary Perform Verification Test VER 2A GoTo 2 Ignition Off ENGINE 3 0L V6 Disconnect the Crankshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 and or EN Inspect the Crankshaft Position Sensor for proper Torque and installation GINE 3 8L V6 15 the Crankshaft Position Sensor properly installed and or ENGINE 3 3L V6 FFV Yes gt GoTo 3 No Properly install CKP Sensor Perform Verification Test VER 2A 198 DRIVEABILITY P 1398 MISFIRE ADAPTIVE NUMERATOR AT LIMIT Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Remove the CKP Sensor and or ENGINE Inspect the Slots in the Flexplate for debris damage or excessive movement 3 3L V6 and or EN 15 there any debris damage or excessive movement GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt Repair as necessary Perform Power
152. CTION Ignition On Engine Not Running Use the Schematic as a guide wiggle A C Pressure Sensor Connector and Harness Monitor the DRB display Was there an A C Pressure Sensor voltage change Repair the Harness or Connector that caused the voltage to change Perform Powertrain Verification Test VER 2A Yes gt Test Complete 219 DRIVEABILITY Symptom P 1695 NO CCD MESSAGE FROM BODY CONTROLLER ea When Monitored and Set Condition P 1695 NO CCD MESSAGE FROM BODY CONTROLLER When Monitored Anytime the engine is running Set Condition CCD messages are received from the BCM for 30 seconds POSSIBLE CAUSES CCD BUS CIRCUIT OPEN CCD BUS CIRCUIT OPEN WIRING HARNESS OBSERVABLE DEFECT BCM NO RESPONSE PCM DEF NO CCD MSG APPLICABILITY Ignition on with engine not running All Erase trouble codes Start engine and allow to run for 1 minute With the DRB read trouble codes Does display show CCD messages from Body Control Module and a start run counter of zero Yes gt GoTo 2 gt GoTo 6 Ignition off Disconnect the PCM Connectors Disconnect the BCM Connectors Note Check Connectors clean repair as necessary Using an ohmmeter measure the CCD Bus Circuit from the PCM to the BCM 15 the resistance below 5 0 ohms Yes gt GoTo 3 No Repair the open CCD Bus Ckt between BCM and PCM Perform Verification Test VER 2A Ignition off Disconn
153. CTION APPLICABILITY Ignition Off All Start engine let idle for at least 20 seconds Key on engine off With the DRB read Trouble Codes 15 the Global Good Trip counter displayed and equal to zero Yes gt GoTo 2 gt GoTo 7 Ignition Off Disconnect the Injector 1 Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance of Injector 1 15 the resistance between 10 0 and 16 0 ohms Yes gt GoTo 3 No Replace the Fuel Injector Perform Powertrain Verification Test VER 5A 83 DRIVEABILITY 0201 ECTOR 1 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off Disconnect the Injector 1 Connector Note Check connectors Clean repair as necessary Turn ignition on With the DRB actuate the Auto Shutdown Reay Using a Voltmeter measure the ASD Relay Output voltage Does the voltage cycle high and low Yes gt GoTo 4 No Repair the open ASD Relay Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Injector 1 Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Use an Ohmmeter in the following step Measure the Injector 1 Driver Circuit from the PCM to the Injector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Injector 1 Driver Circuit Perform
154. Condition This condition exists when the transponder s secret algorithm result fails to match the SKIM s result POSSIBLE CAUSES INTERMITTENT WIRING HARNESS PROBLEM SKIM KEY DEFECTIVE 313 TRANSPONDER CYCLIC REDUNDANCY CHECK CRC FAILURE Continued APPLICABILITY Using the DRB erase the codes Turn ingition off Wait 10 seconds Turn ignition on Using the DRB read the codes Does the DRB display the code that was previously erased Yes gt GoTo 2 No gt GoTo 4 Using the DRB attempt to reprogram the ignition key to the SKIM Module Using the DRB erase the codes Turn ignition off Wait 10 seconds Turn ignition on Using the DRB read the codes Does the code appear Yes gt GoTo 3 No Test Complete Does the code appear Yes Replace the Sentry Key Immobilizer Module Perform the Powertrain Verification Test VER 7A No Test Complete Turn ignition off Note Visually inspect the related wiring harness Look for any chafed pierced pinched or partially borken wires Note Visually inspect the related wire harness connectors Look for broken bent pushed out or corroded terminals Note Refer to any Technical Service Bulletins TSB that may apply Were any problems found Yes Repair wiring harness connectors as necessary Perform the Powertrain Verification Test VER 7A No Test Complete Replace the ignition key with a new key All Usi
155. D CONTROL VACUUM SOLENOID CONTROL 79 80 V35 18LG RD SPEED CONTROL VENT SOLENOID CONTROL RADIATOR FAN NO 1 BLACK 2 WAY CAV CIRCUIT FUNCTION 1 1206 LOW SPEED RADIATOR FAN RELAY OUTPUT 21 12BK GROUND 350 RADIATOR FAN NO 2 RADIATOR FAN RELAY OOO A SENTRY KEY IMMOBILIZER MODULE 321 THROTTLE POSITION SENSOR 2 0L CONNECTOR PINOUTS RADIATOR FAN NO 2 BLACK 2 WAY CAV CIRCUIT FUNCTION 1 C23 1206 LOW SPEED RADIATOR FAN RELAY OUTPUT 2 21 12BK GROUND RADIATOR FAN RELAY BLACK 4 WAY CAV CIRCUIT FUNCTION 1 Zt 14BK GROUND 2 173 14LG DB RADIATOR FAN RELAY CONTROL C23 12DG LOW SPEED RADIATOR FAN RELAY OUTPUT 4 16 12GY FUSED B SENTRY KEY IMMOBILIZER MODULE BLACK 6 WAY CAV CIRCUIT FUNCTION 1 FA 20PK WT FUSED B 2 22 20BK GROUND 3 F87 20WT BK FUSED IGNITION SWITCH OUTPUT ST RUN 4 5 D2 20WT BK CCD BUS 6 Dt 20 CCD BUS BLACK THROTTLE POSITION SENSOR 2 0L BLACK 3 WAY CAV CIRCUIT FUNCTION 1 K4 18BK LB SENSOR GROUND 2 22 180R DB THROTTLE POSITION SENSOR SIGNAL 3 18VT WT 5V SUPPLY 351 R in 2 CONNECTOR PINOUTS NATURAL 1 Sp 9 T
156. DRB read target idle and engine RPM 15 the engine RPM within 200 100 RPM of target idle Yes gt GoTo 5 No GoTo 8 Ignition Off Remove the Motor from the housing Turn Ignition on with Engine Not Running With the DRB actuate the Stepper Motor Wiggle the Wiring Harness from the IAC Motor to the PCM Did the IAC stop operating at any time Yes Repair the Harness or Connectors as necessary Perform Powertrain Verification Test VER 5A No GoTo 6 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No gt GoTo 7 Ignition On Engine Not Running Check Throttle Plate and Linkage for a binding condition The Throttle Linkage must be free and the Throttle Plate at the idle position Ensure Throttle Plate is fully closed and against its stop 15 the Throttle Plate and Linkage okay Yes Test Complete No Repair as necessary Perform Powertrain Verification Test VER 5A 181 DRIVEABILITY P 1294 TARGET IDLE NOT REACHED Continued APPLICABILITY Ignition Off All Start engine allow engine idle to stabilize for 60 seconds With the engine running at idle the in Systems Test perform the wiggle test The idle speed should raise and lower with the display Does the RPM raise and lower correctly Yes gt GoTo 9
157. Disconnect the Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Check connectors Clean repair as necessary Using an ohmmeter measure the Sensor Signal Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A gt GoTo 4 34 DRIVEABILITY 0112 INTAKE AIR TEMP SENSOR VOLTAGE LOW Continued APPLICABILITY Ignition Off Disconnect the Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure between the Sensor Signal and Sensor Ground Circuits 15 the resistance below 5 0 ohms Yes Repair the Sensor Signal Circuit shorted to Sensor Ground Circuit Perform Powertrain Verification Test VER 5A GoTo 5 If there are no potential causes remaining the PCM IAT Sensor is assumed to be All defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running Use the schematic as a guide and wiggle the Sensor Connector and Harness Monitor the DRB display Was there any IAT Sensor voltage change Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A No gt GoTo 7 Ignition Off
158. E FRAME DATA With this screen attempt to duplicate the condition that has set this fault While using FREEZE FRAME DATA pay particular attention to the fault setting conditions such as speed temp load and map vacuum Does the Catalyst Efficiency Failure Reoccur Yes gt GoTo 3 No The Catalytic Conveter Efficiency Failure no longer exists Perform VERIFICATION TEST VER 5A3 Start Engine and let idle Check for exhaust leaks between the Engine and the appropriate Downstream 02 Sensor Are there any exhaust leaks Yes Repair or replace leaking exhaust parts as necessary Perform VERIFICATION TEST VER 5A3 No gt GoTo 4 136 DRIVEABILITY P 0420 1 1 CATALYTIC CONVERTER EFFICIENCY Continued APPLICABILITY NOTE Check the exhaust for excessive smoke from internal oil or coolant All leaks 15 there an oil or coolant consumption condition present Yes gt Repair engine mechanical as necessary and replace Catalytic Converter Perform VERIFICATION TEST VER 5A3 No gt GoTo 5 NOTE A new Downstream O2 Sensor along with an aging Upstream O2 Sensor may cause this trouble code to set Review vehicle repair history Has the Downstream O2 Sensor been replaced without replacing the Upstream O2 Sensor Yes Replace the appropriate Upstream Oxygen Sensor Perform VERIFICATION TEST VER 5A3 No Replace the Catalytic Converter Perform VERIFICATION TEST VER 5A3 137 DRIVEABILIT
159. E TOO LOW When Monitored With no other charging system codes set With the ignition on and the engine running above 1500 RPM Set Condition The battery sensed voltage is 1 volt below the charging system goal for 25 seconds The PCM senses the battery voltage turns off the field driver and senses the battery voltage again If the voltages are the same the code is set POSSIBLE CAUSES ASD RELAY OUTPUT CIRCUIT OPEN GENERATOR FIELD DRIVER CIRCUIT OPEN GENERATOR DEFECTIVE GENERATOR DEFECTIVE B PCM DEFECTIVE APPLICABILITY Start engine and allow it to idle All Note Battery must be fully charged Note Generator Belt tension and condition must be checked before con tinuing With the DRB read the Target Charging voltage 15 the Target Charging voltage above 15 1 volts Yes gt GoTo 2 No gt GoTo 6 Ignition On Engine Not Running Using DRB Temperature Probe measure the under hood temperature near PCM With the DRB read the Ambient BAT Temp Is the battery temperature within 12 degrees 10 degrees of the under hood temperature Yes gt GoTo 3 No Replace the PCM Perform Powertrain Verification Test VER 3A 21 CHARGING P 1682 CHARGING SYSTEM VOLTAGE TOO LOW Continued ACTION APPLICABILITY Ignition Off Note Battery must be fully charged Note Generator Belt tension and condition must be checked before con tinuing Disconnect the Generator Field Connector Disconne
160. ECTOR NO 4 2 0L 2 4L BLACK 2 339 FUEL INJECTOR 5 3 3L 3 8L BLACK 2 339 FUEL INJECTOR NO 6 3 3L 3 8L BLACK 2 340 FUEL TANK MODULE LIGHT GRAY 4 WAY 340 GENERATOR GENERATOR dares 340 GENERATOR BLACK 3 WAY eee Rae ew 340 IDLE AIR CONTROL MOTOR BLACK 4 WAY 341 IGNITION COIL PACK 2 0L 2 4L BLACK 341 IGNITION COIL PACK 3 31 3 81 BLACK 4 341 INSTRUMENT CLUSTER BLACK 13 341 INTAKE AIR TEMPERATURE MANIFOLD ABSOLUTE PRESSURE SENSOR 2 0L GRAY 342 INTAKE AIR TEMPERATURE SENSOR 2 4L GRAY 2 342 KNOCK SENSOR GRAY 2 cee ad ewe oe oe 342 LEAK DETECTION PUMP LT GRAY 4 WAY 342 MANIFOLD ABSOLUTE PRESSURE SENSOR 2 4L 3 3L 3 8L BLACK 3 WAY 343 OUTPUT SPEED SENSOR GRAY 2 343 OXYGEN SENSOR SENSOR SIDE eevee 343 OXYGEN SENSOR 1 1 UPSTREAM GRAY 4 343 OXYGEN SENSOR 1 2 DOWNSTREAM
161. EGR Solenoid Electrical Connector 15 the Vacuum over 3 inches at this time Yes gt Test Complete No Replace the EGR Valve Assembly Perform Verification Test VER 2A Ignition Off Adjust a shop air source to 20 PSI and connect to Backpressure Tube at base of EGR Valve While opening and closing the throttle listen for a tone change Did the tone change Yes Replace the EGR Valve Assembly Perform Verification Test VER 2A No GoTo 7 Engine Running Disconnect the EGR Valve Hose from the EGR Valve Connect the vacuum gauge to the disconnected EGR Valve Hose While watching the gauge unplug EGR Solenoid Electrical Connector Is the Vacuum over 3 inches at this time Yes gt GoTo 8 Replace the EGR Valve Assembly Perform Verification Test VER 2A Ignition Off Remove the EGR Valve Assembly and inspect passages from Valve to Intake Manifold Were passages open between EGR Valve and intake Yes gt GoTo 9 No Repair the EGR Passages as necessary Perform Verification Test VER 2A Ignition Off If there are no potential causes remaining the EGR Valve Assembly is assumed to be defective View repair options Repair Replace the EGR Valve Assembly Perform Verification Test VER 2A Ignition Off Disconnect the EGR Vacuum Supply Hose at the Intake Manifold Connect a vacuum gauge to the Intake Manifold Nipple Read the vacuum gauge at idle Was the vacuum above 10 at idle
162. EM POSSIBLE CAUSES FUEL PUMP GROUND CIRCUIT OPEN FUEL PUMP GROUND CIRCUIT OPEN FUEL PUMP RELAY FUSED B CIRCUIT OPEN FUEL PUMP RELAY FUSED B CIRCUIT OPEN FUEL PUMP RELAY OUTPUT CIRCUIT OPEN FUEL PUMP RELAY OUTPUT CIRCUIT OPEN FUEL FILTER DEFECTIVE FUEL FILTER DEFECTIVE FUEL PUMP DEFECTIVE FUEL PUMP DEFECTIVE FUEL PUMP RELAY FUEL PUMP RELAY IN TANK FUEL PRESSURE REGULATOR DEFECTIVE IN TANK FUEL PRESSURE REGULATOR DEFECTIVE THROTTLE POSITION SENSOR DEFECTIVE FUEL FILTER DEFECTIVE FUEL FILTER DEFECTIVE FUEL INLET STRAINER DEFECTIVE FUEL INLET STRAINER DEFECTIVE FUEL PUMP MODULE DEFECTIVE FUEL PUMP MODULE DEFECTIVE FUEL SUPPLY LINE DEFECTIVE FUEL SUPPLY LINE DEFECTIVE FUEL TUBE RESTRICTED FUEL TUBE RESTRICTED POWERTRAIN CONTROL MODULE DEFECTIVE POWERTRAIN CONTROL MODULE DEFECTIVE THROTTLE CABLES DEFECTIVE THROTTLE CABLES DEFECTIVE THROTTLE POSITION SENSOR DEFECTIVE 278 STARTING CHECKING THE FUEL SYSTEM Continued ACTION APPLICABILITY Note E nsure the SKIM has proper communication and that there are no ENGINE 3 0L V6 SKIM DTC s present before continuing Ignition Off Ensure the Throttle Cables are not holding the Throttle open Is the Throttle held open Yes gt Repair condition that holds the Throttle Body open Perform Powertrain Verification Test VER 1A No gt GoTo 2 Ignition On Engine Not Running ENGINE 3 0L V6 With the DRB actuate the Fuel System and check for Fuel Pump operation at
163. EMBLY DEFECTIVE EGR VALVE ASSEMBLY DOES NOT HOLD VACUUM EGR VALVE ASSEMBLY TONE CHANGED EGR VALVE ASSEMBLY VACUUM lt 3 INCHES PASSAGES BETWEEN EGR VALVE AND INTAKE CLOSED ACTION APPLICABILITY Ignition Off Disconnect the Vacuum Supply Hose at the EGR Solenoid Connect a vacuum gauge to the disconnected Vacuum Supply Hose Start the Engine Was the vacuum above 10 at idle Yes gt GoTo 2 GoTo 10 Ignition Off Adjust a shop air source to 20 PSI and connect to Backpressure Tube at base of EGR Valve While opening and closing the throttle listen for a tone change Did the tone change Yes Replace the EGR Valve Assembly Perform Verification Test VER 2A No gt GoTo 4 Ignition Off Connect a hand pump to the EGR Valve Nipple Apply 10 inches of vacuum and hold for 30 seconds Did the Vacuum hold for 30 seconds Yes gt GoTo 5 No Replace the EGR Valve Assembly Perform Verification Test VER 2A Ignition Off All Connect Back Pressure Hose to transducer Connect a hand pump to the EGR Valve Nipple Start the Engine Slowly apply vacuum to the EGR Valve watch for Engine speed to drop Did the Engine speed drop Yes gt GoTo 3 gt GoTo 6 228 DRIVEABILITY CHECKING EGR SYSTEM Continued ACTION APPLICABILITY Engine Running All Disconnect the EGR Valve Hose from the EGR Valve Connect the vacuum gauge to the disconnected EGR Valve Hose While watching the gauge unplug
164. EN PCM GROUNDS OPEN FUEL PUMP RELAY OUT CKT INTERMITTENT SHORT TO GRND FUEL PUMP RELAY OUTPUT CIRCUIT SHORT TO GROUND SCI RECEIVE CIRCUIT OPEN SCI RECEIVE CIRCUIT SHORT TO GROUND SCI TRANSMIT CIRCUIT OPEN SCI TRANSMIT CIRCUIT SHORTED TO GROUND FUSED B CIRCUIT OPEN BETWEEN FUSE AND BATTERY DIAGNOSTIC READ OUT BOX DEFECTIVE PCM DEFECTIVE NO RESPONSE FUSED B CIRCUIT OPEN BETWEEN FUSE AND PCM FUSED B CIRCUIT SHORT TO GROUND ACTION APPLICABILITY Attempt to start vehicle All Does the vehicle start Yes gt GoTo 2 No GoTo 12 Was the Ignition on when the No Response message was displayed Yes gt GoTo 3 No Turn the ignition on to get a response Ignition off Using an Ohmmeter measure the DLC ground circuit terminals 4 and 5 to ground 15 the resistance below 5 0 ohms for each measurement Yes gt GoTo 4 No Repair the open ground circuit s Perform Powertrain Verification Test VER 1A 272 STARTING RESPONSE CONDITION Continued ACTION APPLICABILITY Ignition off Disconnect the Powertrain Control Module Note Check the connectors Clean repair as necessary Using an ohmmeter test the SCI Receive Wire from the PCM to DLC for resistance Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open SCI Recieve Circuit Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Powertrain Control Module Note Check the connectors Clean
165. ENGINE voltage measurement lead 3 8L V6 and or EN Start the Engine and observe the CMP Sensor voltage pattern on the Oscilloscope GINE 3 3L V6 Are there any of the Camshaft Position Sensor Signals missing FFV Yes gt GoTo 2 gt GoTo 6 191 DRIVEABILITY P 1391 INTERMITTENT LOSS OF CMP OR CKP Continued ACTION Ignition Off Disconnect the CMP Sensor Connector Note Check connectors Clean repair as necessary Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout miswiring Perform Powertrain Verification Test VER 5A No GoTo 3 Ignition Off Disconnect the PCM Note Check connectors Clean repair as necessary Inspect all Terminals Is any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout or miswiring Perform Powertrain Verification Test VER 5A No gt GoTo 4 Ignition Off Disconnect the CMP Sensor Connector Note Check connectors Clean repair as necessary Remove the Camshaft Position Sensor Inspect the Camshaft Sprocket See pertinent service information for instructions Is the Camshaft Sprocket okay Yes gt GoTo 5 No Repair as necessary Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the CMP Sensor Connector Note Check connectors Clean repair as necessary Remove the CMP Sensor Inspect the Camshaft Thrust Plate s Are
166. ENGINE DID NOT START PCM DEFECTIVE ENGINE STARTED ACTION APPLICABILITY Ignition off All Is a Trouble Code also set for ASD Relay Control Circuit Yes Refer to symptom P 1388 AUTO SHUTDOWN RELAY CON TROL CIRCUIT in the DRIVEABILITY category GoTo 2 Ignition on with engine not running With the DRB read Trouble Codes Attempt to start the engine and let idle Is the Global Good Trip displayed and equal to 0 Yes gt GoTo 3 GoTo 10 Ignition off Attempt to start the engine Did the engine start Yes gt GoTo 4 No gt GoTo 6 188 DRIVEABILITY P 1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM Continued ACTION APPLICABILITY Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Remove the Auto Shutdown Relay Note Check connectors Clean repair as necessary Using an ohmmeter measure the resistance of the ASD Relay Output Circuit from ASD Relay to the PCM Connector Is the resistance above 5 0 ohms Yes Repair open ASD Relay Output Circuit Perform Powertrain Verification Test VER 2A No gt GoTo 5 Ignition off If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition Off All Remove the Auto Shutdown Relay Note Check connectors Clean repair as necessary Using a Voltmet
167. EZE FRAME DATA With this screen attempt to duplicate the condition that has set this fault While using FREEZE FRAME pay particular attention to the fault setting condi tions such as speed temp load and map vacuum Does the 1 1 025 SLOW RESPONSE reoccur Yes gt GoTo 5 No 1 02S SLOW RESPONSE no longer exists Perform VERIFICATION TEST VER 5A3 The following are possible causes for O2 Sensor Slow Response exhaust leak fuel contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Start the Engine Check the Exhaust System for leaks between the Engine and the catalyst Are there any leaks Yes Repair or replace leaking Exhaust System as necessary Perform VERIFICATION TEST VER 5A3 No GoTo 7 The following are possible causes for O2 Sensor Slow Response exhaust leak fuel contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Turn Ignition On Engine Off Using a voltmeter backprobe 025 Signal Circuit between O2S Connector 025 Signal and PCM Connector 025 Signal 15 the voltage drop reading below 0 10 VDC Yes gt GoTo 8 No Repair poor connection high resistance on 025 Signal Circuit Perform VERIFICATION TEST VER 5A3 The following are possible causes for O2 Sensor Slow Response exhaust leak fuel All contamination O2 sensor failure electrical wiring connectors electri
168. FROM START TO RUN Continued ACTION APPLICABILITY Ignition off Remove MAP Sensor and inspect for Vacuum restrictions Check connectors Clean repair as necessary Was there a restriction Yes Remove restriction and reinstall the MAP Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 5 If there are no potential causes remaining the MAP Sensor is assumed to be defective View repair options Repair Replace the MAP Sensor Perform Powertrain Verification Test VER 5A Engine must be running While monitoring the DRB display snap the Throttle open and closed Did the vacuum drop rapidly below 1 0 Yes gt GoTo 7 No gt GoTo 8 Engine must be running With the DRB set the engine speed to 1500 RPM With the engine RPM at 1500 read MAP sensor voltage While monitoring the voltage wiggle the wiring from the MAP Sensor to PCM Did the engine stall or voltage become erratic Yes Repair the Wiring or Connector defective between the Map Sensor and the PCM Perform Powertrain Verification Test VER 5A GoTo 9 Ignition Off Remove the MAP Sensor and inspect condition of Intake Manifold and MAP Sensor Vacuum Ports Check connectors Clean repair as necessary Is there restriction or defect in the Vacuum Ports Yes Repair the restricted or defective Vacuum Ports Perform Powertrain Verification Test VER 5A GoTo 10 Engine must be running All With the DRB set t
169. G HARNESS OBSERVABLE DEFECT PINION GEAR DEFECTIVE OUTPUT SPEED SENSOR CIRCUIT OPEN OUTPUT SPEED SENSOR CIRCUIT SHORTED TO GROUND VEHICLE SPEED SENSOR SIGNAL CIRCUIT OPEN VSS SIGNAL CIRCUIT SHORTED TO GROUND OUTPUT SPEED SENSOR DEFECTIVE OUTPUT SPEED SENSOR DEFECTIVE RES gt 5 0 PCM DEFECTIVE NO VSS SIGNAL CKT PCM DEFECTIVE NO VSS SIGNAL CKT TCM DEFECTIVE VSS SIG CKT VSS DEFECTIVE 153 DRIVEABILITY P 0500 NO VEHICLE SPEED SENSOR SIGNAL Continued Ignition Off Raise the Drive Wheels off the ground Warning Be sure to keep hands and feet clear of rotating wheels Start Engine With DRB read the Vehicle Speed Sensor Put Transmission on any forward gear Does the DRB show above zero MPH Yes gt GoTo 2 No GoTo 3 Ignition off Using the Schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition Off Disconnect the VSS Connector Note Check connectors Clean repair as necessary Key On Using a Voltmeter probe the 8 Volt Power Supply Circuit Is the voltage above 7 0 volts Yes gt GoTo 4 No Repair the open 8 volt Supply Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the VSS Connector Note Check connectors Clean repair as necessary Key On Using a Voltmeter Probe the Vehicle Speed Sensor Signal Is the
170. G IDLE AIR CON TROL MOTOR OPERATION CHECKING EVAP EMISSION SYSTEM CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING THE FUEL PRESSURE CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING EGR SYSTEM CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING THE FUEL PRESSURE CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKING EGR SYSTEM CHECKING SECONDARY IGNITION SYSTEM POOR FUEL ECONOMY CHECKING PCM POWER AND GND CKT CHECKING ENGINE VAC UUM CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKING O2S HEATER CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING ENGINE ME CHANICAL SYSTEMS CHECKING EVAP EMISSION SYSTEM CHECKING EGR SYSTEM CHECKING IAT SENSOR CHECKING PNP SWITCH CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING ENGING VAC UUM CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING
171. HROTTLE POSITION SENSOR EXCEPT 2 0L 214129 3 TORQUE CONVERTER CLUTCH SOLENOID ATX R 2 THROTTLE POSITION SENSOR EXCEPT 2 0L NATURAL 3 WAY CAV CIRCUIT FUNCTION 1 K4 18BK LB SENSOR GROUND 2 22 180R DB THROTTLE POSITION SENSOR SIGNAL 3 18VT WT 5V SUPPLY TORQUE CONVERTER CLUTCH SOLENOID ATX 3 WAY CAV CIRCUIT FUNCTION 1 2 F87 18WT BK FUSED IGNITION SWITCH OUTPUT ST RUN 3 54 180R BK TORQUE CONVERTER CLUTCH SOLENOID CONTROL 352 TRANSMISSION CONTROL MODULE CONNECTOR PINOUTS TRANSMISSION CONTROL MODULE BLACK 60 WAY CAV CIRCUIT FUNCTION 1 18LG BK TRS T1 SENSE 2 2 13 TRS T3 SENSE D2 18WT BK CCD BUS 5 6 18GY BK CRANKSHAFT POSITION SENSOR SIGNAL 7 1021 18PK SCI TRANSMIT 8 F45 18YL RD FUSED IGNITION SWITCH OUTPUT START 9 719 18OR BK OVERDRIVE PRESSURE SWITCH SENSE 10 10 18YL DG TORQUE MANAGEMENT REQUEST SENSE 11 Fit 18RD WT FUSED IGNITION SWITCH OUTPUT ST RUN OFF 12 K22 18OR DB THROTTLE POSITION SENSOR SIGNAL 13 113 18DB BK SPEED SENSOR GROUND 14 14 18LG WT OUTPUT SPEED SENSOR SIGNAL 15 T15 18LG TRANSMISSION CONTROL RELAY CONTROL 16 716 18RD TRANSMIS
172. I monitor fails after running or if any other symptom or is present return to the symptom list and perform the appropriate diagnostic testing procedures Check for any Technical Service Bulletins that may apply 5 If the monitor runs and the Good Trip Counter changes to one or more the condition is no longer present If there no DTCs and all components are functioning properly the repair 15 complete 320 APPLICABILITY ALL APPLICABILITY ALL VERIFICATION TESTS Verification Tests Continued Powertrain Verification Test VER 5A3 APPLICABILITY OBDII Monitor Verification All Use this test to verify that the monitor symptom has been repaired and that the vehicle can be returned to the customer NOTE If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 If any other DTC is present refer to the symptom list for further diagnostic testing procedures 3 With the DRBIII monitor the pre test enabling conditions Operate the vehicle within the
173. IAC 2 Driver and 38 4 Drivers Is the resistance below 5 0 ohms on any of the Drivers Yes Repair the IAC Driver Circuits shorted together Perform Powertrain Verification Test VER 5A GoTo 17 Ignition Off Disconnect the Motor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using Ohmmeter measure the resistance between the IAC 8 Driver 4 Driver Is the resistance below 5 0 ohms Yes Repair thelAC Driver Circuits shorted together Perform Powertrain Verification Test VER 5A GoTo 18 162 DRIVEABILITY P 0505 IDLE AIR CONTROL MOTOR CIRCUITS Continued ACTION APPLICABILITY If there are no potential causes remaining the Idle Air Control Motor is assumed to All be defective View repair options Repair Replace the Idle Air Control M otor Perform Powertrain Verification Test VER 5A 163 DRIVEABILITY Symptom P 0505B IDLE AIR CONTROL MOTOR CIRCUIT POSSIBLE CAUSES IAC MOTOR DRIVER IAC 1 CIRCUIT OPEN PCM CONN TERM DAMAGED PUSH OUT OR MISWIRED PCM DEFECTIVE IAC 1 ACTION APPLICABILITY Ignition Off All Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure resistance of the 1 Driver Circuit from the IAC Motor Connector to the PCM Connector
174. IFICATION TEST VER 5A3 Disconnect the 1 2 2 Sensor Connector All Check connectors Clean repair as necessary 74 DRIVEABILITY Symptom 0171 1 1 FUEL SYSTEM LEAN When Monitored and Set Condition 0171 1 1 FUEL SYSTEM LEAN When Monitored With the engine running in closed loop mode the ambient battery temperature above 5 deg C 20 deg F and altitude below 8000 ft Set Condition IfthePCM multiplies short term compensation by long term adaptive and a certain percentage is exceeded for two trips a freeze frame 15 stored the MIL illuminates and a trouble code is stored POSSIBLE CAUSES FUEL PUMP MODULE DEFECTIVE TPS VOLTAGE CHANGE NOT SMOOTH TPS VOLTAGE lt 0 92V FUEL INLET STRAINER PLUGGED ECT SENSOR DEFECTIVE OUT OF CALIBRATION MAP SENSOR DEFECTIVE OUT OF CALIBRATION ENGINE MECHANICAL PROBLEM FUEL FILTER PRESSURE REGULATOR DEFECTIVE HIGH FUEL FILTER PRESSURE REGULATOR DEFECTIVE LOW FUEL PUMP CAPACITY VOLUME OUT OF SPECS ACTION APPLICABILITY Turn ignition on All With the DRB read the 5 Is the Global Good Trip Counter displayed and equal to zero for P0171 Yes gt GoTo 2 gt GoTo 13 Ignition On Engine Not Running With the DRB read the TPS voltage While monitoring the DRB slowly open and dose the Throttle Is the voltage change smooth Yes gt GoTo 3 No Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A 75 DRIVEA
175. Ignition Off Connect the DRB to a functional Data Link Connector on another vehicle Turn the ignition on With the DRB attempt to read trouble codes Did the display No Response Yes gt GoTo 10 No Replace the initial vehicle s Powertrain Control Module Perform Powertrain Verification Test VER 1A Ignition Off Substitute another DRB Adapter Cable Ignition on Engine not running With the DRB attempt to read trouble codes Did the display No Response Yes gt GoTo 11 No Replace the Adapter Cable Perform Powertrain Verification Test VER 1A If there no potential causes remaining the Diagnostic Readout Box is assumed to All be defective View repair options Repair Have the DRB repaired or replaced Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the TP Sensor Connector Note Check connector Clean repair as necessary Turn the ignition on With a voltage measure the Throttle Position Sensor 5 volt Supply circuit Is the voltage above 6 0 volts Yes Repair the open grounds at the Powertrain Control Module Cavities 10 and 50 Perform the Powertrain Verification Test VER 1A GoTo 13 Ignition Off Disconnect the Powertrain Control Module Note Check connector Clean repair as necessary Turn the ignition on With a voltmeter measure Fused Ignition Switch Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 14 No
176. Ignition Off All Disconnect the Throttle Position Sensor Note Check connectors Clean repair as necessary Ignition On Engine Not Running With the DRB read the Throttle Position Sensor voltage 15 the voltage above 1 0 volt Yes Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A gt GoTo 4 Ignition Off Disconnect the Throttle Position Sensor Disconnect the Transmission Control Module Disconnect the PCM Note Check connectors Clean repair as necessary Measure the resistance between the TP Sensor Signal Circuit and ground Is the resistance below 5 0 ohms Yes Repair the Throttle Position Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A GoTo 5 Ignition Off Disconnect the Throttle Position Sensor Disconnect the Transmission Control Module Disconnect the PCM Note Check connectors Clean repair as necessary Measure the resistance between the TP Sensor Signal Circuit and the Sensor Ground Circuit 15 the resistance below 5 0 ohms Yes Repair the Sensor Signal Circuit shorted to Sensor Ground Circuit Perform Powertrain Verification Test VER 5A GoTo 6 Ignition Off Disconnect the Throttle Position Sensor Disconnect the Transmission Control Module if equipped Note Check connectors Clean repair as necessary Key On With the DRB read the Throttle Position Sensor voltage 15 the voltage above 1 0 vol
177. Injector 6 Driver Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Injector 6 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 5A No gt GoTo 6 It there are no potential causes remaining the Powertrain Control Module is ENGINE 3 0L assumed to be defective 3 3L V6 and or EN View repair options GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A 98 DRIVEABILITY P 0206 INJ ECTOR 6 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L Using the schematic as a guide inspect the Wiring and Connectors 3 3L V6 and or EN Were any problems found GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 8 Engine Running ENGINE 3 0L Wiggle Wiring Harness from the Injector to the PCM 3 3L V6 and or EN Does the engine miss or stall GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Repair as necessary where wiggling caused the problem to appear Perform Powertrain Verification Test VER 5A Test Complete 99 DRIVEABILITY Symptom List P 0300 MULTIPLE CYLINDER MIS FIRE P 0301 CYLINDER 1 MIS FIRE P 0302 CYLINDER 2 MIS FIRE P 0303 CYLINDER 3 MIS FIRE P 0304 CYLINDER 4 MIS FIRE Test Note All symptoms listed above are diagnosed using the same tests The t
178. K 5 2 27 eee oS 4 7 4 X L JEN o J 2 KS y gi i EXHAUST N ws 29 i MANIFOLD S UPSTREAM UPSTREAM EXHAUST OXYGEN OXYGEN MANIFOLD SENSOR 3310504 SENSOR 3210503 3 0L 3 3L AND 3 8L 1 2 GROMMET COVER DOWNSTREAM OXYGEN SENSOR CATALYTIC CONVERTER NOTE THE OXYGEN SENSOR CONNECTOR CAN BE EXPOSED BY REMOVING THE GROMMET COVER 3310506 8 5 FUEL SYSTEM 2 0L AND 2 4L 3 0L RESONATOR N RESONATOR D CLEANER 80a4f075 dae 330 3 3L AND 3 8L RESONATOR N 80 41074 FUEL PUMP MODULE CONNECTOR JUEL FUEL PUMP 22 MODULE 3310501 8 6 SWITCHES TYPICAL VIEW BRAKE CONNECTOR 2450302 331 COMPONENT LOCATIONS FUEL RETURN M FUEL N SUPPLY T i Aab 4 L 2 q QUICK T ELECTRICAL CONNECT CONNECTOR RETAINERS 3310406 5 PURGE PRESSURE HOSE FROM LEAK FUEL DETECTION PUMP EVAPORATIVE CANISTER SPEED CONTROL SWITCHES AIRBAG STEERING OEE 3380204 LO L 5 COMPONENT LOCATIONS 8 6 SWITCHES Continued 31TH TRANS TORQUE CONVERTER CLUTCH SOLENOID TRANS COOLER LINE IN AUTOMATIC TRANS PARK TRANSAXLE COOLER NEUTRAL HOUSING LINE OUT SWITCH 2400101 8 7 S
179. KING MAP SENSOR CALIBRATION in the DRIVEABILITY category gt GoTo 4 42 DRIVEABILITY P 0121 TPS VOLTAGE DOES NOT AGREE WITH MAP Continued APPLICABILITY Turn the ignition on All With the DRB read the FREEZE FRAME DATA Using the FREEZE FRAME DATA attempt to duplicate the condition that has set this fault While using the FREEZE FRAME DATA pay particular attention to the fault setting conditions such as vehicle speed engine temperature vehicle load and MAP vacuum Does P0121 reset Yes gt GoTo 6 No gt GoTo 5 Ignition Off Start engine With the DRB read the MAP Sensor voltage Did the MAP Sensor voltage drop from above 3 5 volts to below 2 0 volts Yes gt GoTo 6 No Refer tosymptom CHECKING MAP SENSOR CALIBRATION in the DRIVEABILITY category Ignition On Engine Not Running Using the schematic as a guide wiggle the TPS Harness and Connectors to PCM While monitoring the DRB observe for the TPS voltage to change Did the TPS voltage change at any time Yes Repair the Harness or Connectors as necessary Perform Powertrain Verification Test VER 5A No GoTo 7 Ignition On Engine Not Running With the DRB read the Throttle Position Sensor voltage Is the Throttle Position Sensor voltage above 1 0 volt Yes Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 8 Ignition On Engine Not Running While mo
180. LG TRANSMISSION TEMPERATURE SENSOR SIGNAL 5 T41 18BK WT TRANSMISSION RANGE SENSOR T41 SENSE 6 L1 18VT BK BACK UP LAMP FEED 7 T1 18LG BK TRS T1 SENSE 8 18VT TRS T3 SENSE 9 T42 18VT WT TRS 742 SENSE 10 741 18BR YL TRS T41 SENSE TRANSMISSION SOLENOID PRESSURE SWITCH BLACK 8 WAY CAV CIRCUIT FUNCTION 1 T47 18YLBK 2 4 PRESSURE SWITCH SENSE 2 T50 18DG LOW REVERSE PRESSURE SWITCH SENSE 3 9 18 OVERDRIVE PRESSURE SWITCH SENSE 4 16 18RD TRANSMISSION CONTROL RELAY OUTPUT 5 T59 18PK UNDERDRIVE SOLENOID CONTROL 6 60 18BR OVERDRIVE SOLENOID CONTROL 7 T20 18LB LOW REVERSE SOLENOID CONTROL 8 T19 18WT 2 4 SOLENOID CONTROL VEHICLE SPEED CONTROL SERVO BLACK 4 WAY CAV CIRCUIT FUNCTION 1 V36 18TN RD SPEED CONTROL VACUUM SOLENOID CONTROL 2 V35 18LG RD SPEED CONTROL VENT SOLENOID CONTROL 3 V30 18DB RD SPEED CONTROL BRAKE SWITCH OUTPUT 4 71 18BK GROUND VEHICLE SPEED SENSOR EXCEPT 3 3L 3 8L BLACK 3 WAY CAV CIRCUIT FUNCTION 1 K7 180R 8V SUPPLY GAS 1 F87 18WT BK 8V SUPPLY DIESEL 2 K4 18BK LB SENSOR GROUND GAS 2 K4 20BK LB SENSOR GROUND DIESEL 3 G7 18WT OR VEHICLE SPEED SENSOR SIGNAL 354 SCHEMATICS 10 0 SCHEMATIC DIAGRAMS 10 1 2000 GS 2 0L AND 2 4L ENGINES TO BATTERY ENGINE FUSE IN PDC Ls TO CONTROLLER AUTO gt FUEL SHUTDOWN PUMP RELAY RELAY INTAKE AIR TEMP SENSOR 371 E UPSTREAM 02 SENSOR O a PUMP m FUEL PUMP U FUSE DOWNSTREAM Te B
181. LITY P 0123 THROTTLE POSITION SENSOR VOLTAGE HIGH Continued ACTION APPLICABILITY Ignition Off Disconnect the Throttle Position Sensor Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the TPS Signal Circuit from the TPS Connector to the PCM Connector Is the resistance below 5 0 ohms Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A No Repair the open Throttle Position Sensor Signal Circuit Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running All Wiggle Throttle Position Sensor Connectors and Harness Monitor the DRB display Was there any change in Throttle Position Sensor voltage when wiggled Yes gt Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A gt GoTo 9 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A gt GoTo 10 Ignition On Engine Not Running While monitoring the slowly open and dose the Throttle Is the voltage change smooth Yes Test Complete Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A 50 DRIVEABILITY Symptom P 0125 CLOSED LOOP TEMP NOT REACHED When Monitored and
182. LURE reoccur Yes gt GoTo 4 No gt 1 2 025 Heater failure no longer exists Perform VERIFICATION TEST VER 5A3 73 DRIVEABILITY P 0141 1 2 O2S HEATER FAILURE Continued ACTION APPLICABILITY Disconnect the 1 2 2 Sensor Connector Check connectors Clean repair as necessary Is any terminal corroded damaged pushed out or miswired Yes Repair or replace as necessary Perform VERIFICATION TEST VER 5A3 No gt GoTo 5 Turn Ignition On Engine Off Disconnect the 1 2 02 Sensor Connector Check connectors Clean repair as necessary With the DRB actuate the ASD Relay Using a voltmeter measure the ASD Reay Output Circuit at the O2 Sensor Connector harness side Is the voltage above 10 0 volts Yes gt GoTo 6 No Repair the open ASD Relay Output Circuit Perform VERIFICATION TEST VER 5A3 Using an ohmmeter measure the O2 Sensor Heater Element at the O2 Sensor Connector component side Is the resistance between 4 and 7 ohms Yes gt GoTo 7 No Replace the 1 2 02 Sensor Perform VERIFICATION TEST VER 5A3 Disconnect the 1 2 2 Sensor Connector Check connectors Clean repair as necessary Using an ohmmeter measure from the Heater Ground Circuit to ground at the 2 Sensor Connector harness side Is the resistance below 5 0 ohms Yes Replace the 1 2 O2 Sensor Perform VERIFICATION TEST VER 5A3 No Repair the open 1 2 O2 Sensor Ground Circuit Perform VER
183. NE 2 0L With the DRB read the EATX Trouble Codes 2 41 3 3L 6 FFV Are any codes P0731 P0734 P0736 P0715 P0720 P1794 present or Pinion Factor and or ENGINE not programmed 3 3L V6 and or EN GINE 3 8L V6 Yes Refer to the symptom list for problems related to Transmission No gt GoTo 17 WEATA Ignition Off ENGINE 2 0L Disconnect the Transmission Control Module 2 4L 3 3L V6 FFV Note Check connectors Clean repair as necessary and or ENGINE Connect a J umper Wire to the VSS Signal Circuit 3 3L V6 and or EN Key on GINE 3 8L V6 With the DRB read the VSS Signal w EATX While observing display tap the other end of J umper to ground Does the display show above zero MPH Yes gt GoTo 18 No GoTo 25 156 DRIVEABILITY P 0500 NO VEHICLE SPEED SENSOR SIGNAL Continued Ignition Off Disconnect the Transmission Control Module Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the Output Speed Sensor Circuit at the TCM Connector and Ground 15 the resistance below 5 0 ohms Yes gt GoTo 19 No GoTo 21 Ignition off Disconnect the Transmission Control Module Disconnect the Output Speed Sensor Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the Output Speed Sensor Circuit at the TCM Connector and Ground 15 the resistance below 5 0 ohms Yes Repair the Outpu
184. NGINE In the FREEZE FRAME is the ENGINE RPM over 3000 and the operating temp 3 3L V6 and or EN normal GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Lab scope cam and crank sensor check valve timing running vacuum test Perform VERIFICATION TEST VER 5A2 GoTo 14 The following additional items should be checked as possible mechanical ENGINE 3 0L V6 problems and or ENGINE ENGINE VACUUM must be at least 13 inches in neutral 3 3L V6 and or EN ENGINE VALVE TIMING must be within specifications GINE 3 8L V6 ENGINE COMPRESSION must be within specifications and or ENGINE ENGINE EXHAUST SYSTEM must be free of any restrictions 3 3L V6 FFV ENGINE PCV SYSTEM must flow freely ENGINE DRIVE SPROCKETS must be properly positioned TORQUE CONVERTER STALL SPEED must be within specifications POWER BRAKE BOOSTER no internal vacuum leaks FUEL must free of contamination FUEL INJECTOR plugged or restricted injector control wire not connected to correct injector Are there any engine mechanical problems Yes Repair as necessary Perform VERIFICATION TEST VER 5A2 gt GoTo 15 The following are other possible causes for mis fire ENGINE 3 0L V6 Injector harness connectors ignition coil circuit spark plug mechanical engine and or ENGINE problem PCM power grounds irregular cam and crank signal injectors restricted 3 3L V6 and or EN exhaust intake restriction PCM System EGR System
185. NJECTOR NO 6 DRIVER 15 K38 18GY FUEL INJECTOR NO 5 DRIVER 16 Ki4 18LB BR FUEL INJECTOR NO 4 DRIVER 17 Ki2 18TN WT FUEL INJECTOR NO 2 DRIVER 18 19 20 F87 18WT BK FUSED IGNITION SWITCH OUTPUT ST RUN 21 z 22 G3 18BK PK SERVICE ENGINE SOON INDICATOR DRIVER 23 24 25 K42 18DB LG KNOCK SENSOR SIGNAL 26 K2 18TN BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL 27 127 18BK OR OXYGEN SENSOR GROUND 28 29 30 18BK DG OXYGEN SENSOR 1 1 SIGNAL 31 90 18TN EXCEPT 3 0L SMART START RELAY CONTROL 32 K24 18GY BK CRANKSHAFT POSITION SENSOR SIGNAL 33 18TN YL CAMSHAFT POSITION SENSOR SIGNAL 34 35 K22 180R DB THROTTLE POSITION SENSOR SIGNAL 36 18DG RD MANIFOLD ABSOLUTE PRESSURE SENSOR SIGNAL 37 K21 18BK RD 2 4L INTAKE AIR TEMPERATURE SIGNAL 38 C103 18DG LB EXCEPT A C SWITCH SIGNAL 3 0L 39 40 K35 18GY YL EGR SOLENOID CONTROL 349 R ln 2 CONNECTOR PINOUTS 9000000000 9000000000 9000000000 POWERTRAIN CONTROL MODULE C2 R le 2 RADIATOR FAN NO 1 POWERTRAIN CONTROL MODULE C2 GRAY 40 WAY CAV CIRCUIT FUNCTION 41 V37 18RD LG SPEED CONTROL SWITCH SIGNAL 42 C18 1808 AIC PRESSURE SIGNAL
186. NJECTORS 3380206 SPEED CONTROL SERVO 4 J LS MAD NI ee 80afb66c 326 2 0L AND 2 4L 4 AAN INJECTOR INJECTOR INJECTOR 1 2 3 4 NOTE THE INJECTORS ARE LOCATED UNDER THE PLENUM 3 3L AND 3 8L INJECTOR 1 EE wo 7 77 2 DZA il INJECTOR 2 TOR nI ea INJECTOR z 4 INJECTOR 5 INJECTOR 24 6 AY EA INTAKE MANIFOLD MUST BE COVERED DURING SERVICE INJECTOR HARNESS CONNECTOR 3380405 31TH TRANS TORQUE CONVERTER CLUTCH SOLENOID COOLER AUTOMATIC TRANS PARK TRANSAXLE COOLER NEUTRAL HOUSING LINE OUT SWITCH COMPONENT LOCATIONS 8 3 DATA LINK CONNECTOR DATA LINK M CONNECTOR uzo fe ol ae 3310206 8 4 SENSORS 2 0L AND 2 4L j 4 1 TPS is y E AH BA EGR VALVE BH TUBE INTAKE AIR TEMPERATURE Si S CAMSHAFT NGA D SENSOR BES Pies 3380603 lt 80089802 2 0L AND 2 4L 3 3L AND 3 8L COMBINATION OIL PRESSURE 7 SWITCH AND SENDING UNIT x a A Sy PU KNOCK SENSOR KNOCK SENSOR 3370104 9580400 327 COMPONENT LOCATIONS 8 4 SENSORS Continued 2 0L AND 2 4L 3 3L AND 3 8L
187. NOT SWITCHING PROPERLY Continued ACTION APPLICABILITY Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 3A No Test Complete Ignition Off Disconnect the PCM Disconnect the Generator Field Harness Connector at back of the Generator Note Check connectors Clean repair as necessary Using an ohmmeter test resistance across the Generator Field Terminals 15 the resistance below 5 0 ohms Yes gt GoTo 6 No Repair the Generator as necessary Perform Powertrain Verification Test VER 3A Ignition Off All Disconnect the PCM Disconnect the Generator Field Harness Connector at back of the Generator Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of Generator Field Driver Circuit from the at Generator Harness Connector to ground Is the resistance below 5 0 ohms Yes Repair the Generator Field Driver Circuit short to ground Perform Powertrain Verification Test VER 3A No GoTo 7 Ignition Off Disconnect the PCM Disconnect the Generator Field Harness Connector at back of the Generator Note Check connectors Clean repair as necessary Using an ohmmeter test the resistance of the Generator Field Driver Circuit Generator Connector to PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 8 No Repair open Generator
188. NSOR SIGNAL CKT APPLICABILITY Turn the ignition on All Using the DRB read the trouble codes Are any A C Pressure sensor trouble codes set Yes gt GototheA C Pressure sensor trouble code No GoTo 2 Turn the ignition off Disconnect the A C Pressure Sensor harness connector Turn the ignition on Using a voltmeter measure the A C Pressure Sensor 5 volt supply circuit Is the voltage above 4 8 volts Yes gt GoTo 3 No Repair the open theA C Pressure Sensor 5 volt supply circuit Perform Powertrain Verification Test VER 2A Turn the ignition on Using the DRB monitor the A C Pressure voltage Disconnect the A C Pressure Sensor harness connector Is the voltage above 4 8 volts Yes gt Test Complete No Repair the high resistance the A C Pressure Sensor Signal circuit Perform Powertrain Verification Test VER 2A 255 SPEED CONTROL Symptom List P 1595 SPEED CONTROL SOLENOID CIRCUITS P 1683 SPEED CONTROL POWER RELAY OR S C 12V DRIVER Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be P 1595 SPEED CONTROL SOLE NOID CIRCUITS When Monitored and Set Condition P 1595 SPEED CONTROL SOLENOID CIRCUITS When Monitored Speed control on vehicle speed gt 25 mph RPM lt 5440 brake not applied For an automatic transmission in drive mode For a manual transmission the clutch not depressed Set Condition The pow
189. ODULE C1 BLACK 40 349 POWERTRAIN CONTROL MODULE C2 GRAY 40 350 RADIATOR FAN 1 BLACK 2 350 RADIATOR FAN NO 2 BLACK 2 WAY 351 RADIATOR FAN RELAY BLACK 4 351 SENTRY KEY IMMOBILIZER MODULE BLACK 6 WAY 351 THROTTLE POSITION SENSOR 2 0L BLACK 351 THROTTLE POSITION SENSOR EXCEPT 2 0L NATURAL WAY 352 TORQUE CONVERTER CLUTCH SOLENOID 3 WAY 352 TRANSMISSION CONTROL MODULE BLACK 60 353 TRANSMISSION RANGE SENSOR GRAY 10 WAY 354 TRANSMISSION SOLENOID PRESSURE SWITCH BLACK 8 WAY 354 VEHICLE SPEED CONTROL SERVO BLACK 4 354 VEHICLE SPEED SENSOR EXCEPT 3 3L 3 8L BLACK WAY 354 SCHEMATIC 8 355 10 1 2000 GS 2 0L AND 2 4L ENGINES lt iybiegede hearse 4edes ede 355 10 2 2000 GS 3 0L ENGING 356 10 3 2000 GS 3 3L and 38L ENGINES a aaa a a a e KE EA 357 vi 1 0 INTRODUCTION The procedures contained in this manual include specifications instructions and graphics needed to diagnose the PCM Powertrain System The diag nostics i
190. ORMATION 2 Use the DRB and select THEFT ALARM SKIM then MISCELLANEOUS 3 Select PROGRAM IGNITION KEYS 4 Enter secured access mode by entering the vehi cle four digit PIN NOTE A MAXIMUM OF EIGHT KEYS CAN BE LEARNED TO EACH SKIM ONCE A KEY IS LEARNED TO A SKIM IT THE KEY CANNOT BE RANFERRED TO ANOTHER VEHICLE If ignition key programming is unsuccessful the DRB will display one of the following messages Programming Not Attempted The DRB at tempts to read the programmed key status and there are no keys programmmed in the SKIM memory Programming Key Failed Possible Used Key From Wrong Vehicle SKIM is unable to program key due to one of the following faulty ignition key transponder ignition key is programmed to another vehicle 8 Keys Already Learned Programming Not Done SKIM transponder ID memory is full 1 Obtain ignition keys to be programmed from customer 8 keys maximum 2 Using the erase all ignition keys by select ing MISCELLANEOUS and ERASE ALL CURRENT IGN KEYS 3 Program all ignition keys Learned Key In Ignition Ignition key tran sponder ID is currently programmed SKIM mem ory 3 3 DIAGNOSTIC TROUBLE CODES Each diagnostic trouble code is diagnosed by following a specific testing procedure The diagnos tic test procedures contain step by step instructions for determining the cause of trouble codes as well as no trouble code
191. OWERTRAIN CTRL MODULE CONNECTOR OBSERVABLE DEFECT IAC 1 DRIVER CIRCUIT SHORTED 2 3 OR 4 IAC 1 DRIVER CIRCUIT SHORTED TO GROUND IAC 2 DRIVER CIRCUIT SHORTED TO OR 4 IAC 2 DRIVER CIRCUIT SHORTED TO GROUND IAC 3 DRIVER CIRCUIT SHORTED TO 4 IAC DRIVER CIRCUIT SHORTED TO GROUND IAC MOTOR WIRING HARNESS INTERMITTENT DEFECT IAC MOTOR WIRING HARNESS OBSERVABLE DEFECT ACTION APPLICABILITY Turn ignition off for 10 seconds then start engine and let idle All Allow engine to reach normal operating temperature With the DRB in actuators set RPM to 1400 15 the engine speed 1400 100 RPM Yes gt GoTo 2 No gt GoTo 6 Turn ignition off for 10 seconds then start engine and let idle Allow engine to reach normal operating temperature With the DRB in actuators set RPM to 900 15 the engine speed 900 H 100 RPM Yes gt GoTo 3 No gt GoTo 6 159 DRIVEABILITY P 0505 IDLE AIR CONTROL MOTOR CIRCUITS Continued ACTION APPLICABILITY Turn ignition off for 10 seconds then start engine and let idle Allow engine to reach normal operating temperature With the DRB in Systems Test perform the IAC Wiggle Test Note The idle speed should raise and lower with the display Does the IAC Motor operate properly Yes gt GoTo 4 No gt GoTo 6 Turn ignition off for 10 seconds then start engine and let idle Allow engine to reach normal operating temperature With the DRB in Systems Test perform the IAC Wi
192. Output Circuit voltage Does the voltage cycle high and low Yes gt GoTo 4 No Repair the open ASD Relay Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Injector 2 Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Use an Ohmmeter in the following step Measure the Injector 2 Driver Circuit from the PCM to the Injector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Injector 2 Driver Circuit Perform Powertrain Verification Test VER 5A Disconnect the Powertrain Control Module Connector Note Check Connectors Clean repair as necessary Using an Ohmmeter measure the Injector 2 Driver Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Injector 2 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 5A No gt GoTo 6 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Engine Running Wiggle Wiring Harness from the Injector to the PCM Does the engine miss or stall Yes Repair as necessary where wiggling caused the problem to appear Perform Powertrain Verification Test VER 5A GoTo 8 Ignition Off All Di
193. P 0138 1 2 O2 SENSOR SHORTED TO VOLTAGE When Monitored With the engine running for more than 2 minutes and coolant temperature above 76 degrees 170 degrees Set Condition The Downstream Oxygen Sensor Signal voltage is above 1 2 volts POSSIBLE CAUSES 1 2 2 SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE 1 2 2 SEN HARNESS INTERMITTENT SHORT TO VOLTAGE 1 2 O2 SENSOR CONNECTOR OBSERVABLE DEFECT 1 2 02 SENSOR CONNECTOR OBSERVABLE DEFECT 1 2 2 SENSOR HARNESS OBSERVABLE DEFECT 1 2 2 SENSOR DEFECTIVE ACTION APPLICABILITY Start the engine All With the DRB read the Downstream O2 Sensor voltage Is the Downstream O2 Sensor voltage above 1 2 volts Yes gt GoTo 2 No gt GoTo 5 Ignition Off Disconnect the Downstream O2 Sensor Note Check connectors Clean repair as necessary Start the engine With the DRB read the Downstream O2 Sensor Voltage Is the Upstream O2 Sensor voltage above 1 2 volts Yes Repair the Downstream O2 Sensor Signal Circuit for a short to voltage If ok replace the PCM Perform Powertrain Verification Test VER 5A No gt GoTo 3 Ignition Off Disconnect the Downstream O2 Sensor Note Check connectors Clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes Repair or replace as necessary Perform Powertrain Verification Test VER 5A gt GoTo 4 66 DRIVEABILITY P 0138 1 2 O2 SENSOR SHORTED TO VOLTAGE Continued ACTION APPLICA
194. PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 4A 262 SPEED CONTROL Symptom SPEED CONTROL DENIED MESSAGE APPLICABILITY At this time the S C switch and servo functions appear to operate properly All Using the monitor the speed control cutout status Road test the vehicle at speeds over 30mph and attempt to set the speed control The following items will not allow the speed control to set The last or most recent cause for speed control not to set is indicated by the Denied status If ON OFF Denied message 15 indicated the Powertrain Control Module does not see an signal from the switch at cavity 41 If SPEED Denied message is indicated the vehicle speed as seen by the Powertrain Control Module at cavity 66 is not greater than 36 mph If RPM Denied message is indicated the engine rpm is excessively high If BRAKE Denied message is indicated the Brake Switch Sense Circuit is open indicating tothe PCM that the Brakes are applied The Sense Circuit cavity 62 of the PCM is grounded through the Brake Pedal Switch when the Brakes are released If P N Denied message is indicated Park Neutral Switch Sense Circuit is grounded indicating to PCM that transmission is not in gear The Sense Circuit cavity 76 of PCM is grounded through the Park Neutral Switch when transmission is in park or neutral If RPM SPD Denied message
195. PECIFICATIONS BLOWN NORMAL 41TE TRANS gt OUTPUT HH SPEED SENSOR RANGE TRANSMISSION SOLENOID PACK 0 30 15 WORN NORMAL LATE VALVE READING HEAD READING RINGS OR TIMING RANGE GASKET DILUTED OIL VACUUM AT IDLE ATIDLE ACCELERATION RAPID ere DECELERATION ACCELERATION ae STICKING DECELERATION WORN VALVE RESTRICTED POOR WORN VALVE EXHAUST VALVE VALVE GUIDES SPRINGE DROPS SEATING ATIDLE STEADIES AS MORE TOWARD ATIDLE ENGINE ZERO AS SPEED ENGINE RPM INCREASES ENGINE INCREASES SPEED INCREASES 0920606 CONNECTOR PINOUTS 9 0 CONNECTOR PINOUTS A C COMPRESSOR CLUTCH BLACK 2 WAY CAV CIRCUIT FUNCTION 1 C3 18DB BK A C CLUTCH COMPRESSOR RELAY OUTPUT 2 71 18BK GROUND COMPRESSOR CLUTCH AMBIENT TEMPERATURE SENSOR GRAY 2 WAY CAV CIRCUIT FUNCTION 1 G31 20VT LG AMBIENT TEMPERATURE SENSOR SIGNAL AMBIENT 2 G32 20BK LB SENSOR GROUND TEMPERATURE N SENSOR N E 9 5 R 52 AMBIENT TEMPERATURE SENSOR SENSOR SIDE 2 WAY CAV CIRCUIT FUNCTION 1 AMBIENT TEMPERATURE SENSOR SIGNAL 2 SENSOR GROUND AMBIENT 5 TEMPERATURE SENSOR SENSOR SIDE GRAY BRAKE LAMP SWITCH GRAY 6 WAY CAV CIRCUIT FUNCTION 1 1 K29 20WT PK BRAKE SWITCH SENSE 2 71 20BK GROUND 3
196. Plug 1 2 4L 1 4 DOHC Connect the Cable to a Spark Tester and or ENGINE Connect the Spark Tester to a good Ground 3 3L V6 and or EN Warning Ensure that there are no Fuel or Fuel vapors present or GINE 3 8L V6 the Engine compartment before continuing with the test and or ENGINE While cranking the Engine for 10 seconds watch for spark 3 3L V6 FFV Is there good spark Yes Refer to Symptom list for further diagnostic tests No gt GoTo 27 Ignition Off ENGINE 2 0L Disconnect the Spark Plug Cable at Spark Plug 2 2 4L 1 4 DOHC Connect the other end of the Cable to a Spark Tester and or ENGINE Connect the Spark Tester to a good Ground 3 3L V6 and or EN Ensure that there no fuel or fuel vapors present or near the Engine GINE 3 8L V6 Compartment before continuing with the test and or ENGINE While cranking the Engine for 10 seconds watch for spark 3 3L V6 FFV Is there good spark Yes gt GoTo 28 gt GoTo 29 Ignition Off ENGINE 2 0L Disconnect the Spark Plug Cable at Spark Plug 2 2 4L 1 4 DOHC Connect the other end of the Cable to a Spark Tester and or ENGINE Connect the Spark Tester to a good Ground 3 3L V6 and or EN Ensure that there no fuel or fuel vapors present or near the Engine GINE 3 8L V6 Compartment before continuing with the test and or ENGINE While cranking the Engine for 10 seconds watch for spark 3 3L V6 FFV 15 there good spark Yes
197. Position Switch Sense Circuit at the Powertrain Control Module Connector and ground While moving gear selector through all gear positions watch the ohmmeter Did the display stay below 5 0 ohms at all times Yes gt GoTo 3 No gt GoTo 5 Ignition Off Disconnect the negative Battery cable Disconnect the Powertrain Control Module Disconnect the Transmission Control Module Measure the resistance between the Park Neutral Position Switch Sense Circuit at the PCM harness connector and ground Ignition On Move the gear selector through all gear positions Did the ohmmeter display above 5 0 ohms to below 5 0 ohms Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A gt GoTo 4 249 DRIVEABILITY CHECKING PARK NEUTRAL POSITION SWITCH Continued APPLICABILITY Ignition Off Disconnect the Powertrain Control Module Disconnect the Transmission Range Sensor Note Check connectors Clean repair as necessary Measure the resistance between the Park Neutral Position Switch Sense Circuit at the Powertrain Control Module Connector and ground While moving gear selector through all gear positions watch the onmmeter Did the display still remain below 5 0 ohms Yes Repair P N Switch Sense Ckt for a short to ground Perform Powertrain Verification Test VER 2A No Test Complete Ignition Off All Disconnect the Powertrain Control Module Note Che
198. Powertrain Verification Test VER 7A 315 SENTRY KEY IMMOBILIZER SYSTEM VIN MISMATCH Continued APPLICABILITY Turn ignition off All Note Visually inspect the related wiring harness Look for any chafed pierced pinched or partially broken wires Note Visually inspect the related wire harness connectors Look for broken bent pushed out or corroded terminals Note Refer to any Technical Service Bulletins TSB that may apply Were any problems found Yes Repair wiring harness connectors as necessary Perform the Powertrain Verification Test VER 7A No Test Complete 316 VERIFICATION TESTS Verification Tests VERIFICATION TEST VER 1A APPLICABILITY No Start Verification ALL Use this test to verify that a No Start condition has been repaired and that the vehicle can be returned to the customer Note If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 Inspect the engine oil for fuel contamination Replace the oil and filter a
199. R 1 2 DOWNSTREAM BLACK 4 WAY CAV CIRCUIT FUNCTION 1 Z12 20BK GROUND 2 A142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 3 K127 20BK LB OXYGEN SENSOR GROUND 4 K141 20TN WT OXYGEN SENSOR 1 2 SIGNAL PARK NEUTRAL POSITION SWITCH ATX BLACK 3 WAY CAV CIRCUIT FUNCTION 1 L1 18VT BK BACK UP LAMP FEED 2 T41 18BK WT PARK NEUTRAL POSITION SWITCH SENSE 3 F20 18WT FUSED IGNITION SWITCH OUTPUT RUN 344 TRANSMISSION CONTROL RELAY ENGINE STARTER MOTOR _ gt RELAY CIGAR LIGHTER ACCESSORY _ RELAY FRONT BLOWER MOTOR RELAY WIPER ON _ RELAY WIPER HIGH Low gt RELAY SPARE FUSE POWER DISTRIBUTION CENTER gt sa gt 345 CONNECTOR PINOUTS AIC COMPRESSOR CLUTCH RELAY AUTOMATIC SHUT DOWN RELAY FUEL PUMP REL
200. R POSSIBLE CAUSES FOR MIS FIRE CAM CRANK VALVE TIMING OR VACUUM PROBLEM ELECTRONIC IGNITION COIL OUTPUT LOW ENGINE MECHANICAL PROBLEM SECONDARY IGNITION PATTERN IRREGULAR FUEL CONTAMINATION FUEL PRESSURE LEAK DOWN OUT OF SPECIFICATION FUEL PUMP AMPERAGE OUT OF SPECIFICATION FUEL PUMP CAPACITY OUT OF SPECIFICATION FUEL PUMP PRESSURE OUT OF SPECIFICATION MIS FIRE DOES NOT REOCCUR ACTION APPLICABILITY With the DRB read the DTCs Is the MIS FIRE GOOD TRIP counter displayed and equal to zero Yes gt GoTo 2 No gt GoTo 3 At this time the conditions that set this fault are present With the DRB read the FREEZE FRAME SIMILAR CONDITIONS WINDOWS Attempt to operate the vehicle in the similar conditions When the vehicle is operating in the SIMILAR CONDITIONS WINDOW go to the WHICH CYLINDER 15 MISFIRING screen Is the DRB counting mis fires at this time All Yes gt GoTo 4 No gt GoTo 3 At this time the mis fire does not exist or is an intermittent problem All With the DRB read the FREEZE FRAME and SIMILAR CONDITIONS WINDOW With these screens attempt to duplicate the condition that has set this fault While using FREEZE FRAME pay particular attention to the fault setting condi tions such as speed temp load and map vacuum Does the mis fire reoccur Yes gt GoTo 4 No longer exists Perform VERIFICATION TEST VER 5A2 With the DRB read the FREEZE FRAME DATA Use the freeze frame data and
201. RANSMISSION CONTROL RELAY EATX CAV CIRCUIT FUNCTION 30 INTERNAL FUSED B 85 716 18BK GROUND 86 15 18LG TRANSMISSION CONTROL RELAY CONTROL 87 16 18RD TRANSMISSION CONTROL RELAY OUTPUT 87A WIPER HIGH LOW RELAY CAV CIRCUIT FUNCTION 20 INTERNAL WIPER RELAY OUTPUT 85 V16 20WT WIPER HIGH LOW RELAY CONTROL 86 INTERNAL WIPER RELAY OUTPUT 87 V4 12RD YL WIPER HIGH LOW RELAY HIGH SPEED OUTPUT 87A 12BR WT HIGH LOW WIPER RELAY LOW SPEED OUTPUT WIPER ON RELAY CAV CIRCUIT FUNCTION 30 INTERNAL WIPER ON RELAY OUTPUT 85 V14 18RD VT WIPER ON OFF RELAY CONTROL 86 INTERNAL FUSED B 87 INTERNAL FUSED B 87A 71 18BK GROUND 348 POWERTRAIN CONTROL MODULE C1 CONNECTOR PINOUTS POWERTRAIN CONTROL MODULE C1 BLACK 40 WAY CAV CIRCUIT FUNCTION 1 2 K18 18RD YL IGNITION COIL NO 3 DRIVER 3 18DB TN IGNITION COIL NO 2 DRIVER 4 5 7 32 18YL RD SPEED CONTROL ON OFF SWITCH SENSE 6 142 18DG OR AUTOMATIC SHUT DOWN RELAY OUTPUT 7 K13 FUEL INJECTOR NO 3 DRIVER 18DG GENERATOR FIELD DRIVER 9 10 712 18BK TN GROUND 11 K19 18GY RD IGNITION COIL NO 1 DRIVER 12 13 Ki1 18WT DB FUEL INJECTOR NO 1 DRIVER 14 K58 18BR DB FUEL I
202. RATOR SHORTED PCM DEFECTIVE CHARGING SYSTEM PCM BATT TEMP 12 DEGREES 10 DEGREES F UNDER HOOD TEMP PCM VOLT amp TARGET CHARGING VOLT DIFFER BY gt 10 ACTION APPLICABILITY Ignition on engine not running Note Battery must be fully charged Note Generator Belt tension and condition must be checked before con tinuing With the DRB actuate the Generator Field Driver Using a voltmeter backprobe the Generator Field Driver Circuit voltage in back of Generator Does the DRB show voltage shift low to high Yes gt GoTo 2 No gt GoTo 6 Ignition On Engine Not Running With the DRB stop the Generator Field Driver actuation Read the target charging voltage 15 the target charging voltage between 13 0 to 14 9 volts Yes Test Complete No GoTo 3 Engine running All Manually set the engine speed to 1600 RPM With the DRB read both the voltage and the target charging voltage Compare the target to the volt reading Watch for up to 5 minutes if necessary for a 1 0 volt difference or more Was there more than a 1 0 volt difference Yes Replace PCM Perform Powertrain Verification Test VER 3A No gt GoTo 4 Ignition On Engine Not Running Usingthe Temperature Probe measure the under hood temperature near PCM With the DRB read the BTS temperature 15 the Battery Temperature within 12 degrees 10 degrees F of the under hood temperature Yes gt GoTo 5 No
203. RUN POSITION FOR ONE HOUR THEN ENTER THE CORRECT PIN ENSURE ALL ACCESSORIES ARE TURNED OFF ALSO MONITOR THE BATTERY STATE AND CONNECT A BATTERY CHARGER IF NECESSARY 5 Press ENTER to transfer the secret key the SKIM will send the secret key to the PCM 3 2 10 PROGRAMMING THE SENTRY KEY IMMOBILIZER MODULE NOTE IF THE PCM AND THE SKIM ARE REPLACED AT THE SAME TIME PROGRAM THE VIN INTO THE PCM FIRST ALL VEHICLE KEYS WILL THEN NEED TO BE REPLACED AND PROGRAMMMED TO THE NEW SKIM Turn the ignition on transmission park neutral 2 Use the DRB and select THEFT ALARM SKIM then MISCELLLANEOUS 3 Select SKIM MOSULE REPLACEMENT GAS OLINE 4 Program the vehicle four digit PIN into the SKIM 5 Select COUNTRY CODE and enter the correct country NOTE BE SURE TO ENTER THE CORRECT COUNTRY CODE IF THE INCORRECT COUNTRY CODE IS PROGRAMMED INTO SKIM THE SKIM MUST BE REPLACED 6 Select UPDATE VIN the SKIM will learn the VIN from the PCM 7 Press ENTER to transfer the VIN the PCM will send the VIN to the SKIM 8 The DRB will ask if you want to transfer the secret key Select ENTER to transfer secret key from the PCM This will ensure the current vehicle ignition keys will still operate the SKIS system 3 2 11 PROGRAMMING THE IGNITION KEYS TO THE SENTRY KEY IMMOBILIZER MODULE Turn the ignition on transmission park neutral GENERAL INF
204. SION CONTROL RELAY OUTPUT 17 116 18RD TRANSMISSION CONTROL RELAY OUTPUT 18 19 719 18WT 2 4 SOLENOID CONTROL 20 720 18LB LOW REVERSE SOLENOID CONTROL 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 141 18BK WT TRS T41 SENSE 42 142 18VT WT TRS 142 SENSE 43 D1 CCD BUS 44 45 46 D6 18BK LB SCI RECEIVE 47 147 18YL BK 2 4 PRESSURE SWITCH SENSE 48 49 50 750 1806 LOW REVERSE PRESSURE SWITCH SENSE 51 18BK LB SENSOR GROUND 52 152 18RD BK INPUT SPEED SENSOR SIGNAL 53 214 16BK YL GROUND 54 754 18VT LG TRANSMISSION TEMPERATURE SENSOR SIGNAL 55 155 18OR RD 3 3L 3 8L AUTOSTICK OVERDRIVE OFF MUX INPUT 56 A5 18RD DB FUSED B 57 213 16BK RD GROUND 58 G7 18WT OR VEHICLE SPEED SENSOR SIGNAL 59 759 18PK UNDERDRIVE SOLENOID CONTROL 60 7160 18BR OVERDRIVE SOLENOID CONTROL 353 R ie 2 CONNECTOR PINOUTS TRANSMISSION RANGE SENSOR TRANSMISSION SOLENOID PRESSURE SWITCH R VEHICLE SPEED CONTROL SERVO 4 2 VEHICLE SPEED SENSOR 2 4L TRANSMISSION RANGE SENSOR GRAY 10 WAY CAV CIRCUIT FUNCTION 1 F20 18WT FUSED IGNITION SWITCH OUTPUT RUN 2 3 13 18DB BK SPEED SENSOR GROUND 4 54 18VT
205. SOR SHORTED TO 55 gt 28555 55955 55 P 0133 1 1 02S SLOW RESPONSE cph to 57 P 0134 1 1 O2 SENSOR STAYS AT CENTER 2 5 5 5 5555 5 64865 60 P0195 O25 HEATER FAILURE 62 P 0137 1 2 O2 SENSOR VOLTAGE SHORTED TO GROUND 64 P 0138 1 2 O2 SENSOR SHORTED VOLIAGE ee chew 66 P 0139 1 2 O25 SLOW RESPONSE 68 0140 1 2 O2 SENSOR STAYS 2 5 2 22 22 056 71 P 0141 1 2 O25 HEATER FAILURE 25552555455 ne een cde 73 PUBL SYSTEM LEAN Bue 75 P0201 INJECTOR 1 CONTROL CIRCUIT 225522552 patna 83 P 0202 INJECTOR 2 CONTROL CIRCUIT beet itd Oded oe we 86 P 0203 INJECTOR 3 CONTROL CIRCUIT cate 89 P 0204 INJECTOR 44 CONTROL CIRCUIT niceties cede cre en eae 92 0205 INJECTOR 5 CONTROL CIRCUIT Beene eure ee nes 95 P 0206 INJEC TOR 6 CONTROL CIRCUIT ce 97 P 0300 MULTIPLE CYLINDER MIS FIRE 2 ted dues Dike 100 P0301 CYLINDER 1 5 100 P 0302 CYLINDER 2 5 100 P 0303 CYLINDER 3 2 555 2
206. SWITCH PCM DEF P N SWITCH ACTION APPLICABILITY Ignition On Engine Not Running TRANSMISSION With the DRB read Park Neutral Switch input state AUTOMATIC While moving gear selector in and out of Park and Reverse watch DRB Display 3 SPD 31TH Did the display show P N and D R Yes gt GoTo 2 gt GoTo 3 Ignition Off TRANSMISSION Inspect the Wiring and Connector relating to Park Neutral Position Switch AUTOMATIC Were any problems found 3 SPD 31TH Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 307 TRANSMISSION P 1899 PARK NEUTRAL SWITCH STUCK IN PARK OR IN GEAR Continued ACTION APPLICABILITY Ignition Off TRANSMISSION Disconnect the PCM Connector AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH Using an Ohmmeter measure between the Park N eutral Switch Sense Circuit at the PCM Connector and Ground While moving Gear Selector between Park and Reverse watch Ohmmeter display Did the display switch from below 5 0 ohms to above 5 0 ohms Yes Replace the Perform Powertrain Verification Test VER 5A No gt GoTo 4 Ignition Off TRANSMISSION Disconnect the PCM Connector AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH Using an Ohmmeter measure between the Park N eutral Switch Sense Circuit at the PCM Connector and Ground While moving gear selector between Park and Reverse
207. Servo Connector to gnd Is the resistance below 5 0 ohms Yes gt GoTo 11 No Repair the open Ground Circuit Perform Powertrain Verification Test VER 4A Ignition Off All Disconnect the Speed Control Servo Connector Note Check connectors Clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Powertrain Verification Test VER 4A No GoTo 12 Disconnect the vacuum supply from the Speed Control Servo Attach a vacuum gauge to the vacuum hose Start the Engine allow to idle for 1 minute Turn engine off Observe Vacuum Gauge for 10 seconds Does the Vacuum hold for at least 10 seconds Yes gt GoTo 13 No Replace the Vacuum Reservoir Perform Powertrain Verification Test VER 4A If there are potential causes remaining the S C Servo is assumed to be defective View repair options Repair Replace the Speed Control Servo Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Speed Control Servo Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Ground Circuit from Servo Connector to gnd Is the resistance below 5 0 ohms Yes gt GoTo 15 No Repair the open Ground Circuit Perform Powertrain Verification Test VER 4A 268 SPEED CONTROL CHECKING SPEED CONTROL OPERATION Continued APPLICABILITY Ignition Off Disconnect the Speed Control Servo C
208. Set Condition P 0125 CLOSED LOOP TEMP NOT REACHED When Monitored After engine 15 started for ten minutes Set Condition engine temperature does not go above 10 degrees 50 degrees F by 13 minutes after the engine is started for 2 consecutive trips POSSIBLE CAUSES PCM CONNECTOR AND TERM DAM PSHD OUT OR MISWIRED ECT SENSOR CONN AND TERM DAM PSHD OUT MISWIRED ECT SENSOR RESISTANCE gt 11 00 K OHMS PCM DEFECTIVE THERMOSTAT DEFECTIVE ACTION APPLICABILITY Turn the ignition on All With the DRB read the FREEZE FRAME DATA Using the FREEZE FRAME DATA attempt to duplicate the condition that has set this fault Note that the DTC is a 2 trip failure Does P0121 reset Yes gt GoTo 3 No GoTo 2 The conditions required to set the DTC no longer present Ensure the engine cooling system is operating properly coolant level is at specifica tion and no external or internal coolant leaks Refer to the appropriate service category for cooling system information Is the Cooling System operating correctly Yes gt Test complete No Repair as necessary Perform Powertrain verification Test VER 5A Ignition off Disconnect the ECT Sensor Connector Note Check Connectors clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes Clean repair connector as necessary Perform Powertrain Verification Test VER 5A gt GoTo 4 51 DRIVEABILITY 0125
209. Signal Circuit Perform VERIFICATION TEST VER 5A3 The following are possible causes for O2 Sensor Slow Response exhaust leak fuel All contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Start the Engine NOTE Check the exhaust for excessive smoke caused by oil or coolant consumption 15 there an or coolant consumption condition present Yes Repair engine mechanical as necessary and replace O2 Sensor Perform VERIFICATION TEST VER 5A3 No GoTo 6 69 DRIVEABILITY P 0139 1 2 O2S SLOW RESPONSE Continued ACTION APPLICABILITY The following are possible causes for O2 Sensor Slow Response exhaust leak fuel All contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Turn Ignition On Engine Off Using a voltmeter backprobe 025 Sensor Ground Circuit between 025 Connector Sensor Ground and PCM Connector Sensor Ground Is the voltage drop reading below 0 10 VDC Yes Replace the O2 Sensor Perform VERIFICATION TEST VER 5A3 No Repair poor connection high resistance on O2 Sensor Ground Circuit Perform VERIFICATION TEST VER 5A3 70 DRIVEABILITY Symptom P 0140 1 2 O2 SENSOR STAYS AT CENTER When Monitored and Set Condition P 0140 1 2 O2 SENSOR STAYS AT CENTER When Monitored With the engine running for more than 2 minutes and engine temperature greater than 76 degre
210. Switch Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Engine Vacuum Supply Hose at the LDP Install a Vacuum Gauge to Engine Vacuum Supply Hose at the LDP Start engine and read Vacuum Gauge Does Vacuum Gauge read within 1 inch of engine vacuum Yes gt GoTo 6 No Repair leak or obstruction in Vacuum Perform Powertrain Verification Test VER 5A 207 DRIVEABILITY P 1494 LEAK DETECTION PUMP PRESSURE SWITCH Continued ACTION APPLICABILITY Ignition Off Disconnect the LDP Connector Note Check connectors Clean repair as necessary Disconnect the PCM Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the LDP Pressure Switch Sense Circuit from the PCM Connector to a good ground Is the resistance below 5 0 ohms Yes Repair the LDP Pressure Switch Sense Circuit for a short to ground Perform Powertrain Verification Test VER 5A GoTo 7 Ignition Off All Disconnect the LDP Connector Note Check connectors Clean repair as necessary Disconnect the PCM Note Check connectors Clean repair as necessary Using Ohmmeter measure the resistance of the LDP Pressure Switch Sense Circuit from the PCM Connector to the LDP Connector Is the resistance below 5 0 ohms Yes gt GoTo 8 No Repair the open LDP Switch Sense Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect t
211. TC is still present refer to any Technical Service Bulletins that may apply 5 If a different DTC s is present refer to the symtom list and perform diagnostic testing as necessary f there no DTCs present and all components are functioning correctly repair is now complete 322 APPLICABILITY All 8 0 COMPONENT LOCATIONS 8 1 CONTROL MODULES AND PDC 2 224 5 22 8 2 CONTROLS amp SOLENOIDS 2 0L AND 2 4L 3370101 COMPONENT LOCATIONS TRANSMISSION CONTROL MODULE OX AL amp gt ww 3 J EN 2 9 X AAG B0b76f97 BODY CONTROL MODULE BEHIND JUNCTION BLOCK 3520605 EGR VALVE 1170503 323 4 L 5 COMPONENT LOCATIONS 9 8 2 CONTROLS amp SOLENOIDS Continued 3 3L AND 3 8L cs SE n a JOMI FAG L 2 L i EGR SOLENOID EGR VALVE 5 3380605 EVAPORATIVE SYSTEM TEST PORT EVAP SOLENOID To were CANISTER Le VACUUM HOSES THROTTLE BODY 3370102 2 7 pe E ear OH a ENGINE ae DETECTION ELECTRICAL PUMP VACUUM CONNECTOR 5 2 CRADLE MOUNTING 4 BOLTS PLATE
212. TEM OPERATION WITH NO DTC S Continued APPLICABILITY If there are no other potential causes remaining the PCM is assumed to be defective All View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 3A 26 DRIVEABILITY Symptom P 0106 BAROMETRIC PRESSURE OUT OF RANGE When Monitored and Set Condition P 0106 BAROMETRIC PRESSURE OUT OF RANGE When Monitored With theignition key on at less than 350 milliseconds and engine speed at less than 255 RPM Set Condition PCM senses the voltage from the MAP sensor to be less than 2 196 volts but above 0 019 volt for 300 milliseconds POSSIBLE CAUSES MAP SENSOR 5V SUPPLY CIRCUIT OPEN MAP SENSOR 5V SUPPLY CIRCUIT SHORT TO GROUND MAP SENSOR SIGNAL CIRCUIT OPEN MAP SENSOR SIGNAL CIRCUIT PARTIAL SHORT TO GROUND MAP SENSOR WIRING HARNESS INTERMITTENT DEFECT MAP SENSOR WIRING HARNESS OBSERVABLE DEFECT MAP SENSOR DEFECTIVE PCM DEFECTIVE VOLTAGE HIGH PCM DEFECTIVE VOLTAGE LOW ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read the MAP Sensor voltage Is the voltage below 2 2 volts Yes gt GoTo 2 No gt GoTo 11 Ignition Off Disconnect the MAP Sensor Electrical Connector Turn the ignition on engine not running Note Check connectors Clean repair as necessary Using a Voltmeter measure voltage of the 5 Volt Supply Circuit at the Map Sensor Connector 15 the voltage above 4 5 volts
213. TOR T 1 VP MSG CTR TP SENSOR TCC SOLENOID ATX ONLY ae TOTOM _ 000 Dm EATX FUSED IGN VEHICLE Te SPEED SENSOR IGN DUTY CYCLE PURGE SWITCH SOLENOID ev EERSTE 5 TEMPERATURE SENSOR DISTRIBUTOR RAD er FAN FUSE LEAK DETECTION PUMP SOLENOID TO DATA RELAY LINK TO BRAKE CONNECTOR SWITCH a DATA BUS 80ae835c 356 SCHEMATICS 10 3 2000 GS 3 3L AND 3 8L ENGINES ENGINE TOTCM FUSE IN PDC PNP SWITCH TO CONTROLLER AUTO l L rua SHUTDOWN PUMP RELAY 1 43 UPSTREAM 02 SENSOR 2222214 PUMP FUEL PUMP FUSE TO BATTERY DOWNSTREAM 02 SENSOR TO STARTER RELAY SMART START SPEED CONTROL SWITCH ELECTRONIC IGNITION CONTACL TO SPEED SWITCH INJECTOR 5 TALC AC CLUTCH BLOCK CLUTCH RELAY erin pee INJECTOR 6 550 INJECTOR 1 SPARK PLUGS GN LINJECTOR 2 57 TNJECTOR 2 a SWITCH N INJECTOR 3 POSITIVE TEMPERATURE COEFFICIENT RECTIFIER 2 KNOCK SENSOR PRESSURE e MAP SENSOR TOTCM INJECTOR 4 FINAGOW NIVELYAMOd GENERATOR VP MSG CTR MIL FUSED IGN LEAK DETECTION PUMP SOLENSID EQUIPPED SOLID STATE RAD FAN RELAY TO BRAKE SWITCH 357 JUNCTION
214. To 5 15 the resistance below 5 0 ohms Yes gt GoTo 6 No Repair the open A C Presure Sensor Circuit Perform Powertrain Verification Test VER 2A If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition On Engine Not Running With the DRB read the A C Pressure Sensor voltage Using the schematic as a guide wiggle the A C Pressure Sensor Connector and Harness Monitor the DRB display Was there any A C Pressure Sensor voltage change Yes Repair the Harness or Connector that caused the voltage to change Perform Powertrain Verification Test VER 2A GoTo 8 Ignition Off All Disconnect the A C Pressure Sensor Note Check connectors Clean repair as necessary Disconnect the PCM Using an Ohmmeter measure the A C Pressure Sensor Signal Circuit from the PCM to the Sensor 215 DRIVEABILITY P 1598 A C PRESSURE SENSOR VOLTS TOO HIGH Continued APPLICABILITY Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 216 DRIVEABILITY Symptom P 1599 A C PRESSURE SENSOR VOLTS TOO LOW MMMM When Monitored and Set Condition P 1599 A C PRESSURE SENSOR VOLTS TOO LOW When Monitored With the ignition sw
215. VE WRITE FAILURE APPLICABILITY Ignition on engine not running With the DRB perform the SRI Memory Test Does the DRB display Write Refused Yes gt GoTo 2 No gt GoTo 4 Ignition on engine not running With the DRB perform the SRI Memory Test Does the display Write Failure Yes Replace the Powertrain Control Module Perform Verification Test VER 2A No gt GoTo 3 Did the trouble code Write Refused return Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A No Test Complete Ignition on engine not running With the DRB perform the SRI Memory Test Does the display SRI Mileage Invalid Yes gt Update the mileage and retest the SRI Memory Perform Powertrain Verification Test VER 2A Ignition on engine not running All With the DRB perform the SRI Memory Test Note Retest the SRI Memory two more times when necessary No GoTo 5 222 DRIVEABILITY P 1696 PCM FAILURE EEPROM WRITE DENIED Continued ACTION APPLICABILITY Ignition on engine not running All With the DRB perform the SRI Memory Test Does the DRB display Write Failure Yes Replace the Powertrain Control Module Perform Verification Test VER 2A No GoTo 6 Ignition on engine not running Compare SRI mileage stored value to the Instrument Panel Odometer mileage Is the mileage the same Yes Retest the SRI Mem
216. Verification Test VER 2A No gt GoTo 4 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary 15 any terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 2A gt GoTo 7 Ignition Off Disconnect the Powertrain Control Module Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the Brake Switch Sense Circuit to a good ground 15 the resistance below 5 0 ohms Yes Repair the Brake Switch Sense Circuit for a short to ground Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the Powertrain Control Module Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the Brake Switch Sense Circuit resistance from the PCM to the Brake Switch Connector 15 the resistance below 5 0 ohms Yes GoTo 6 No Repair the Brake Switch Sense Circuit for an open Perform Powertrain Verification Test VER 2A No GoTo 8 173 DRIVEABILITY P 0703 BRAKE SWITCH STUCK PRESSED OR RELEASED Continued ACTION APPLICABILITY If there are no potential causes remaining
217. WIRING HARNESS OBS DEFECT EVAP PURGE SOLENOID CONTROL CIRCUIT OPEN EVAP PURGE SOLENOID CONTROL CIRCUIT SHORT TO GND PROPORTIONAL PURGE SOL CONTROL CKT SHORT TO GROUND PROPORTIONAL PURGE SOLENOID CONTROL CIRCUIT OPEN PWM PURGE SENSE CIRCUIT OPEN PWM PURGE SENSE CIRCUIT SHORT TO GROUND POWERTRAIN CONTROL MODULE DEFECTIVE ACTION APPLICABILITY 15 the vehicle equipped with a Proportional Purge solenoid Yes gt GoTo 10 No GoTo 2 Ignition On Engine Not Running With the DRB actuate the Evap Purge Solenoid With the DRB read codes Is the Global Good Trip displayed and equal to 0 Yes gt GoTo 3 No gt GoTo 8 143 DRIVEABILITY P 0443 EVAP PURGE SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off Disconnect the Evap Purge Solenoid Connector Note Check connectors Clean repair as necessary Key On Using a Voltmeter measure the voltage of the Ignition Switch Output Circuit at Solenoid Connector Is the voltage above 10 0 volts Yes gt GoTo 4 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Evap Purge Solenoid Connector Note Check connectors Clean repair as necessary Key On Connect a test light from the Evap Purge Solenoid Control EKT to the Ignition Switch out CKT Using a DRB actuate the Evap Purge Solenoid Does the test light flash on and off Yes Replace the Evap Purge Solenoid
218. Warning The engine may be cranked in the next step Keep away from moving parts Briefly connect a jumper wire between Starter Relay Output and Fused Circuits Did the Starter Motor crank the Engine Yes gt GoTo 2 No GoTo 9 Ignition Off Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary With a Voltmeter measure the Fused B Circuit Is the voltage above 11 6 volts Yes gt GoTo 3 No Repair open Fused Circuit check Ignition Switch Fuse in PDC Perform Powertrain Verification Test VER 1A 296 STARTING NO CRANK CONDITION Continued ACTION APPLICABILITY Ignition Off Ensure the Transmission is in Park With the DRB read the Park Neutral Position Switch Does the Switch show Park Yes gt GoTo 4 No Repair Park Neutral Switch Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary Using an ohmmeter test the Starter Relay Terminals for resistance Is the resistance above 100 ohms Yes Replace the Starter Relay Perform Powertrain Verification Test VER 1A No gt GoTo 5 Ignition Off All Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary With a voltmeter probe Ignition Switch Output Circuit While attempting to crank the engine read the Voltmeter 15 the voltage above 10 volts Ye
219. Y Symptom P 0441 EVAP PURGE FLOW MONITOR FAILURE When Monitored and Set Condition P 0441 EVAP PURGE FLOW MONITOR FAILURE When Monitored With engine temperature greater than 170 F engine in closed loop engine idling for 2 minutes no low fuel MAP less than 15 7 inches mercury and barometric altitude less than 8 000 feet Set Condition Note with LDP must pass stricter evap system test first No air flow through the evaporative system is detected by the evap monitor POSSIBLE CAUSES PURGE CANISTER LINE DAMAGED PURGE SOLENOID AND CANISTER DEFECTIVE PURGE SOLENOID DEFECTIVE VACUUM HOSES DAMAGED OR PLUGGED EVAP PURGE MONITOR FAILURE DOES NOT REOCCUR APPLICABILITY With the DRB read the DTCs All Is the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 3 No gt GoTo 2 At this time the E vap Purge Flow Monitor ailure does not exist or is intermittent problem With the DRB read the FREEZE FRAME DATA With these screens attempt to duplicate the condition that has set this fault While using FREEZE FRAME pay particular attention to the fault setting condi tions such as speed temp load and map vacuum Does the Evap Purge Flow Monitor Failure reoccur Yes gt GoTo 3 No The Purge Flow Monitor failure no longer exists Perform VERIFICATION TEST VER 5A3 NOTE Carefully inspect all vacuum hoses for proper routing and for pinched or plugged hoses from the eng
220. Yes gt GoTo 2 No GoTo 5 Ignition On Engine Not Running With the DRB actuate the LDP Solenoid While monitoring the LDP Switch state wiggle Wiring Harness from the LDP Solenoid to PCM Did the LDP Switch state ever change from up to down when wiggled Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 6A GoTo 3 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 6A No gt GoTo 4 209 DRIVEABILITY P 1495 LEAK DETECTION PUMP SOLENOID CIRCUIT Continued ACTION APPLICABILITY Check the freeze frame data to determine the conditions when code was set All Attempt duplication of freeze frame conditions for added diagnostics If there are no other possible causes remaining there is assumed to an intermit tent problem with a Wiring Harness Connector or Wire View repair options Repair Visually inspect related Wire Harness Connectors and Harnesses Look for broken bent pushed out or corroded terminals and for chafed pierced or partiallly broken wire respectively Refer to any hotlines or technical service bulletins that apply Ignition Off Disconnect the LDP Solenoid Note Check connectors Clean repair as necessary Key on Using a Voltmeter measure the voltage of the F used I gnition Swi
221. a DTC If the monitor fails or the DTC returns or any other symptom or DTC is present refer to the symptom list for further diagnostic testing procedures Check for any Technical Service Bulletins that may apply If there are no DTC s present and all components are functioning properly the repair is complete Powertrain Verification Test VE R 5A2 Fuel System Lean Rich or Misfire Verification Use this test to verify that the Fuel System Lean Fuel System Rich or Misfire symptom has been repaired and that the vehicle can be returned to the customer NOTE If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret KEY data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 If any other DTC is present refer to the symptom list for further diagnostic testing procedures 3 With the DRBIII monitor the Similar Conditions Window and attempt to duplicate the conditions that the vehicle was operating at when the DTC was set If the conditions can be duplicated the Good Trip counter will change to one or more 4 the DTC resets or the OBDI
222. ad and record the freeze frame data and the Fuel System Similar Conditions Window data Utilize the data and try to duplicate the operating conditions at which the DTC was set Pay particular attention to the ECT and RPM for added diagnostics Note Refer to any TSB s that may apply to the symptom Test Complete Repair Test Complete 78 Symptom P0172 1 1 FUEL SYSTEM RICH When Monitored and Set Condition P0172 1 1 FUEL SYSTEM RICH When Monitored With the engine closed loop mode the ambient battery temperature above 5 deg 20 deg F and altitude below 8000 ft Set Condition Ifthe PCM multiplies short term compensation by long term adaptive and the result is below a certain value for two trips a freeze frame is stored the MIL illuminates and a trouble code is stored POSSIBLE CAUSES FUEL PUMP MODULE DEFECTIVE TPS VOLTAGE CHANGE NOT SMOOTH TPS VOLTAGE lt 0 92V FUEL INLET STRAINER PLUGGED ECT SENSOR DEFECTIVE OUT OF CALIBRATION MAP SENSOR DEFECTIVE OUT OF CALIBRATION ENGINE MECHANICAL PROBLEM FUEL FILTER PRESSURE REGULATOR DEFECTIVE HIGH FUEL FILTER PRESSURE REGULATOR DEFECTIVE LOW ACTION APPLICABILITY Turn ignition on All With the read the Is the DTC Specific Good Trip Counter displayed and equal to zero Yes gt GoTo 2 No gt GoTo 14 Ignition On Engine Not Running With the DRB read the TPS voltage While monitoring the slowly open and dose the
223. age of the S C Brake Switch Output Circuit at Speed Control Servo Connector Is the voltage above 10 0 volts Yes gt GoTo 3 gt GoTo 10 Ignition off All Disconnect the Speed Control Servo Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance of the Gnd Circuit at Servo Connector 15 the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open Ground Circuit Perform Powertrain Verification Test VER 4A Ignition off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Note Ensure the Brake pedal is not depressed during the following steps With an ohmmeter test the resistance from the S C Power Supply Circuit to the S C Vent Solenoid at PCM 15 the resistance between 35 ohms 55 ohms Yes gt GoTo 5 GoTo 7 Ignition off Disconnect Powertrain Control Module Note Check connectors Clean repair as necessary Note Ensure the Brake Pedal is not depressed during the following steps With an ohmmeter test the resistance from the S C Power Supply Circuit to the S C Vacuum Solenoid Control at PCM Is the resistance between 35 ohms and 55 ohms Yes gt GoTo 6 No GoTo 7 257 SPEED CONTROL P 1595 SPEED CONTROL SOLENOID CIRCUITS Continued ACTION APPLICABILITY Ignition off If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View
224. al to 0 Yes gt GoTo 2 GoTo 12 Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Turn ignition on Using a Voltmeter measure the 8 Volt Supply Circuit Is the voltage above 7 0 volts Yes gt GoTo 3 Repair the open 8 Volt Supply Circuit Perform Powertrain Verification Test VER 5A 113 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued ACTION APPLICABILITY Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CMP Sensor Ground Circuit from the CMP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open CMP Sensor Ground Circuit to the Harness splice Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Is any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 5 Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Connect one end of a jumper wire to the CMP Sensor Signal Circuit Ignition On Engine Not Running W
225. amshaft Position Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the CMP Sensor Signal Circuit and the Sensor Ground Circuit at the CMP Sensor Connector Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to the Sensor ground Perform Powertrain Verification Test VER 5A GoTo 37 If there are no potential causes remaining the Powertrain Control Module is ENGINE 3 0L V6 assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Attempt to start the engine if not already running ENGINE 3 0L V6 Does the engine start Yes gt GoTo 39 No Return to symptom list and select symptoms for no start condition Ignition Off ENGINE 3 0L V6 Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 121 DRIVEABILITY Symptom P 0351 IGNITION COIL 1 PRIMARY CIRCUIT When Monitored and Set Condition P 0351 IGNITION COIL 1 PRIMARY CIRCUIT When Monitored With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running and none of the coils in dwell when checked
226. ancefrom the CKP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes gt GoTo 8 Repair the open Sensor Ground Circuit Perform Powertrain Verification Test VER 2A 109 DRIVEABILITY P 0320 NO CRANK REFERENCE SIGNAL AT PCM Continued APPLICABILITY Ignition Off Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary Connect one end of a jumper wire to the Crank Position Signal Circuit Turn ignition on With the DRB monitor the current CKP state Tap the other end of jumper to Sensor ground several times Does the CKP state change to present Yes gt GoTo 9 GoTo 10 Ignition Off Remove the Crankshaft Position CKP Sensor Inspect the Flywheel for damage 3 0L 3 3L and 3 8L Inspect the Crankshaft Notches for debris or damage 15 the Flywheel damaged Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Replace the Crankshaft Position Sensor Perform Powertrain Verification Test VER 2A Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance of the CKP Signal Circuit toa good ground Is the resistance below 5 0 ohms Yes Repair the Crank Position Sensor Signal Circuit for a short to ground Note Check TCM for short Perform Powertrain Verification Test VER 2A GoTo 11 Ignition Off Disconnect the Crank Position CKP Sensor Conn
227. as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using an Ohmmeter measure the PWM Purge Sense Circuit to ground Is the resistance below 5 0 ohms Yes Repair the PWM Purge Sense Circuit short to ground Perform Powertrain Verification Test VER 5A No GoTo 16 146 DRIVEABILITY P 0443 EVAP PURGE SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off Disconnect Proportional Purge Solenoid Connector Note Check connectors Clean repair as necessary Disconnect the battery Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using and Ohmmeter measure the PWM Purge Sense Circuit PCM to Solenoid Connector Is the resistance below 5 0 ohms Yes gt GoTo 17 No Repair the open PWM Purge Sense Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running With the DRB actuate the Evap Purge Solenoid With the DRB read codes Wiggle Wiring Harness from the Solenoid to PCM Does the Evap Purge Solenoid Control Circuit code return Yes Repair as necessary where wiggling caused problem to appear
228. as necessary Using Ohmmeter measure the resistance of Injector 38 15 the resistance between 10 0 16 0 ohms Yes gt GoTo 3 No gt Replace the Fuel Injector Perform Powertrain Verification Test VER 5A 89 DRIVEABILITY P 0203 INJ ECTOR 3 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Note It may be necessary to remove the Intake Plenum in the following steps Disconnect the Injector 3 Connector Note Check connectors Clean repair as necessary Ignition On Engine Not Running With the DRB actuate the Auto Shutdown Relay Using a Voltmeter measure the ASD Relay output voltage Does the voltage cycle high and low Yes gt GoTo 4 No Repair the open ASD Relay Output Circuit Perform Powertrain Verification Test VER 5A Ignition Off Note It may be necessary to remove the Intake Plenum in the following steps Disconnect the Injector 3 Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure the Injector 38 Driver from the PCM to the Injector 15 the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Injector 8 Driver Circuit Perform Powertrain Verification Test VER 5A Ignition Off Note It may be necessary to remove the Intake Plenum in the following steps Disconnect the Injector 3 Connect
229. as necessary Perform Powertrain Verification Test VER 2A No gt GoTo 11 Start Engine Note The Engine must be running before continuing test Wiggle Wiring Harness from ASD Relay to the Powertrain Control Module With the DRB read Trouble Codes Did trouble code ASD Relay Output Voltage at PCM reset Yes Repair as necessary where wiggling caused the Trouble Code to be set Perform Powertrain Verification Test VER 2A No Test Complete 190 DRIVEABILITY Symptom P 1391 INTERMITTENT LOSS OF CMP OR CKP E When Monitored and Set Condition P 1391 INTERMITTENT LOSS OF CMP OR CKP When Monitored Engine running over 7 seconds Set Condition When the expected cam signal level disagrees with the actual cam signal level POSSIBLE CAUSES CKP SENSOR CKT WIRING HARNESS INTER DEF CMP SENSOR SIGNAL CKT WIRING HARNESS INTER DEF CAMSHAFT POSITION SENSOR DEFECTIVE CAMSHAFT SPROCKET DEFECTIVE CRANKSHAFT DEFECTIVE CRANKSHAFT POSITION SENSOR DEFECTIVE DISTRIBUTOR PULSE RING DEFECTIVE FLYWHEEL DEFECTIVE CAMSHAFT TARGET MAGNET DEFECTIVE CAMSHAFT THRUST PLATES S NOT ATTACHED CKP SENSOR CONNECTOR TERMINALS OBS DEF CKP SENSOR CONNECTOR TERMINALS OBS DEFECT PCM CONN TERMINALS OBS DEF CKP SENSOR PCM CONN TERMINALS OBS DEF CMP SENSOR CAMSHAFT CYLINDER HEAD DEFECTIVE ACTION APPLICABILITY Ignition Off ENGINE 3 3L V6 At the CMP Sensor backprobe the CMP Sensor Signal Circuit with the Oscilloscope and or
230. as necessary With a Voltmeter measure the Fused B Circuit 15 the voltage above 11 6 volts Yes gt GoTo 19 No Repair open Fused B Circuit check Ignition Switch Fuse in PDC Perform Powertrain Verification Test VER 1A 299 STARTING NO CRANK CONDITION Continued ACTION APPLICABILITY Ignition Off All Disconnect the Starter Relay Connector Note Check connectors Clean repair as necessary With a voltmeter probe Ignition Switch Output Circuit While attempting to crank the engine read the Voltmeter Is the voltage above 10 volts Yes gt GoTo 20 No Repair the open Ignition Switch Output Start Circuit Perform Powertrain Verification Test VER 1A If there are no potential causes remaining the Starter Motor is assumed to be defective View repair options Repair Replace the Starter Motor Perform Powertrain Verification Test VER 1A 300 STARTING Symptom START AND STALL CONDITION ACTION APPLICABILITY Note Ensure the SKIM has proper communication and that there are no All SKIM DTC s present before continuing At this point in the diagnostic test procedure it is assumed that all of the engine electrical systems are operating as designed and arenot the cause of a start and stall or start problem The following additional items should be checked as possible mechanical problems Any one of these items can produce a start and stall or start condition
231. asure the ground circuits at cavities 10 and 50 Is the resistance below 5 0 ohms Yes gt GoTo 2 No Repair the open ground circuit s Perform Verification Test VER 2A Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Turn Ignition on With Voltmeter measure the Fused Ignition Switch Output Circuit cavity 20 15 the voltage above 10 0 volts Yes gt GoTo 3 No Repair the open Fused Ignition Switch Output Circuit Perform Verification Test VER 2A Ignition Off Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Turn Ignition on Using a voltmeter probe the fused B circuit 46 Is the voltage above 10 0 volts Yes Test Complete Repair the open fused circuit Perform Verification Test VER 2A 251 DRIVEABILITY Symptom CHECKING SECONDARY IGNITION POSSIBLE CAUSES SECONDARY IGNITION OUT OF SPECIFICATION IGNITION COIL DEFECTIVE SECONDARY IGNITION SYSTEM DEFECTIVE WATER TEST ACTION APPLICABILITY Ignition Off All Connect a suitable Engine Analyzer to the Engine Start Engine Allow Engine to idle Note If the Engine will not idle maintain a constant RPM above idle Note Set the Scope to read display or parade pattern Follow the equipment manufacturer s procedure for pattern analysis 15 the secondary ignition pattern ok Yes gt GoTo 2 No Repair
232. at the OBDII symptom has been repaired and that the vehicle can be returned to the customer The proper way to verify that OBDII DTC has been repaired is to allow the PCM torun and pass the appropriate monitor s Note If the Powertrain Control Module has been changed and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 If any other DTC is present refer to the symptom list for further diagnostic testing procedures 3 With the DRBIII Clear 4 In order for an OBDII monitor to run certain pre test conditions must be met Refer to the applicable OBDII monitor pre test screen on the DRBII for monitor enabling conditions 5 Operate the vehicle within the enabling conditions and allow the applicable monitor to run While the monitor is running the OBDII monitor screen on the DRBIII will display IN PROGRESS the 2 will beep After the monitor is complete view the results Refer to the appropriate service information as necessary A monitor may have to fail more than once in order to set
233. attery and ground clip to Battery Set Pressure Hold to Open and set Vent to Open Turn Pump Timer On To prevent noise from interfering with test move tool 6872 away from vehicle Using the Ultrasonic Leak Detector start listening for leaks at Gas Cap then proceed to Rollover Valve Canister Leak Detection Pump and Evap Purge Solenoid Were any leaks heard with the Ultrasonic Leak Detector Yes Repair or replace leaking component Perform VERIFICATION TEST VER 6A No Replace Leak Detection Pump Perform VERIFICATION TEST VER 6A At this time the condition required to set the code is not present Using the schematic as a guide inspect the wiring connectors and hoses Were any problems found Yes Repair as necessary Perform VERIFICATION TEST VER 6A No Test Complete 142 DRIVEABILITY Symptom P 0443 EVAP PURGE SOLENOID CIRCUIT nT When Monitored and Set Condition P 0443 EVAP PURGE SOLENOID CIRCUIT When Monitored With the ignition key on and the engine running Set Condition After arming conditions are satisfied not powering down not already in limp in time since last solenoid activation gt 72 micro seconds The PCM will set a trouble code if the actual sate of the solenoid does not match the intended state POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN PROPORTIONAL EVAP PURGE SOLENOID DEFECTIVE EVAP PURGE SOL CKT WIRING HARNESS INTERMITTENT DEF EVAP PURGE SOLENOID CKT
234. be verified prior to this test All Inspect the Generator Belt tension and condition 15 the Generator Belt in good condition Yes gt GoTo 2 No Repair as necessary Perform Powertrain Verification Test VER 3A Engine Running With the DRB set engine speed to 1600 RPM for 30 seconds With the DRB return the engine to idle speed and read codes Are there any Charging System trouble codes Yes Refer to Symptom List for problems related to Charging Perform Powertrain Verification Test VER 3A No gt GoTo 3 Turn ignition on Engine off With the DRB actuate the Generator field Using a Voltmeter backprobe Generator Field Driver Terminal at the back of Generator Note The voltage should cycle from 7 2 volts to Battery voltage every 1 4 seconds at both Terminals While monitoring the Voltmeter wiggle the field Terminals back tothe PCM and ASD Relay Was there any interruption in the normal cycle between 7 2 volts and Battery voltage Yes Repair the Wire where wiggling interrupted the voltage cycle Perform Powertrain Verification Test VER 3A gt GoTo 4 24 CHARGING CHECKING CHARGING SYSTEM OPERATION WITH NO DTC S Continued ACTION APPLICABILITY Engine Running With the DRB read trouble codes Are there any Charging System trouble codes Yes Refer to Symptom List for problems related to Charging Perform Powertrain Verification Test VER 3A No gt GoTo 5 Ignition O
235. cal mechanical and O2 heater failure Start the Engine NOTE Check the exhaust for excessive smoke caused by oil or coolant consumption 15 there an or coolant consumption condition present Yes Repair engine mechanical as necessary and replace O2 Sensor Perform VERIFICATION TEST VER 5A3 No GoTo 6 58 DRIVEABILITY P 0133 1 1 O2S SLOW RESPONSE Continued ACTION APPLICABILITY The following are possible causes for O2 Sensor Slow Response exhaust leak fuel All contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Turn Ignition On Engine Off Using a voltmeter backprobe 025 Sensor Ground Circuit between 025 Connector Sensor Ground and PCM Connector Sensor Ground Is the voltage drop reading below 0 10 VDC Yes Replace the O2 Sensor Perform VERIFICATION TEST VER 5A3 No Repair poor connection high resistance on O2 Sensor Ground Circuit Perform VERIFICATION TEST VER 5A3 59 DRIVEABILITY Symptom P 0134 1 1 O2 SENSOR STAYS AT CENTER a E When Monitored and Set Condition 0134 1 1 O2 SENSOR STAYS AT CENTER When Monitored With the engine running for more than 2 minutes and engine temperature greater than 76 degrees C 170 degrees F Set Condition TheUpstream Oxygen Sensor Signal voltage is between 0 35 volt and 0 55 volt for 1 5 minutes POSSIBLE CAUSES 02 SENSOR 1 1 GROUND CIRCUIT OPEN 02 SENSOR 1 1 SIGNAL
236. ce below 5 0 ohms Yes gt GoTo 13 No Repair open ASD Relay Output Circuit Perform Powetrain Verification Test VER 1A Ignition Off ENGINE 3 0L V6 Disconnect the ASD Relay Note Check connectors Clean repair as necessary Ignition On Engine Not Running With a Voltmeter measure the F used B Circuit cavity B in ASD Relay Connector 15 the voltage above 10 volts Yes Replace the Auto Shutdown Relay Perform Powertrain Verification Test VER 1A No Repair open Fused B Perform Verification TEST VER 1A Ignition Off ENGINE 3 0L V6 Remove the Distributor Cap 15 the Distributor Rotor loose Yes Repair loose Distributor Rotor as necessary Perform Verification TEST VER 1A gt GoTo 15 If there are no potential causes remaining the Distributor Drive System is assumed ENGINE 3 0L V6 to be defective View repair options Repair Repair the Distributor Drive System Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the Spark Plug Cable at Spark Plug 1 and 2 4L 1 4 DOHC Connect the Cable to a Spark Tester Connect the Spark Tester to a good Ground Warning Ensure that there no Fuel or Fuel vapors present or near the Engine compartment before continuing with the test While cranking the Engine for 10 seconds watch for spark 15 there good spark Yes Refer to Symptom list for further diagnostic tests No gt GoTo 17 291 STARTING CHECKING
237. cessary Perform VERIFICATION TEST 5 2 GoTo 15 The following additional items should be checked as possible mechanical problems ENGINE VACUUM must be at least 13 inches in neutral ENGINE VALVE TIMING must be within specifications ENGINE COMPRESSION must be within specifications ENGINE EXHAUST SYSTEM must be free of any restrictions ENGINE PCV SYSTEM must flow freely ENGINE DRIVE SPROCKETS must be properly positioned TORQUE CONVERTER STALL SPEED must be within specifications POWER BRAKE BOOSTER internal vacuum leaks FUEL must be free of contamination FUEL INJECTOR plugged or restricted injector control wire not connected to correct injector Are there any engine mechanical problems Yes gt Repair as necessary Perform VERIFICATION TEST VER 5A2 The following are possible causes for mis fire All Injector harness connectors ignition coil circuit spark plug mechanical engine problem PCM power grounds irregular cam and crank signal injectors restricted exhaust intake restriction PCM Evap System EGR System damaged trigger No Test Complete 103 DRIVEABILITY Symptom List P 0305 CYLINDER 5 MIS FIRE P 0306 CYLINDER 6 MIS FIRE Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be P 0305 CYLINDER 5 MIS FIRE When Monitored and Set Condition P 0305 CYLINDER 5 MIS FIRE When Monitored With the engine ru
238. ck connectors Clean repair as necessary Measure the resistance between the Park Neutral Position Switch Sense Circuit at the Powertrain Control Module Connector and ground While moving gear selector through all gear positions watch the onmmeter Did the display switch from below 5 0 ohms to above 5 0 ohms Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A No GoTo 6 Ignition Off Disconnect the Powertrain Control Module Disconnect the Transmission Range Sensor TRS Connector Note Check connectors Clean repair as necessary Measure the resistance of the Park Neutral Position Switch Sense Circuit from the PCM Connector to the TRS Connector 15 the resistance below 5 0 ohms Yes gt GoTo 7 No Repair open P N Position Switch Sense Ckt Perform Powertrain Verification Test VER 2A If there are no potential causes remaining the Transmission Range Sensor or the P N Switch is assumed to be defective View repair options Repair Replace the Transmission Range Sensor or P N Switch Perform Powertrain Verification Test VER 2A 250 DRIVEABILITY Symptom CHECKING PCM POWER AND GROUND CIRCUITS POSSIBLE CAUSES OPEN PCM GROUND CIRCUIT AT CAVITY 10 FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OPEN PCM GROUND CIRCUIT AT CAVITY 50 ACTION APPLICABILITY Ignition Off All Disconnect the PCM Connector Note Check connectors Clean repair as necessary With an Ohmmeter me
239. corroded Yes Clean repair Connector as necessary Perform Powertrain Verification Test VER 5A No Test Complete 44 DRIVEABILITY Symptom P 0122 THROTTLE POSITION SENSOR VOLTAGE LOW eT When Monitored and Set Condition P 0122 THROTTLE POSITION SENSOR VOLTAGE LOW When Monitored With the ignition on Set Condition sensor signal voltage goes below 0 16 volt POSSIBLE CAUSES TPS 5 VOLT SUPPLY CIRCUIT OPEN TPS SIGNAL CIRCUIT SHORT TO GROUND TPS SIGNAL CIRCUIT SHORT TO SENSOR GROUND CIRCUIT TPS WIRING HARNESS INTERMITTENT DEFECT TPS WIRING HARNESS OBSERVABLE DEFECT PCM DEFECTIVE TPS THROTTLE POSITION SENSOR DEFECTIVE THROTTLE POSITION SENSOR VOLTAGE CHANGE NOT SMOOTH TRANSMISSION CONTROL MODULE DEFECTIVE TPS ACTION APPLICABILITY Turn key on engine off All With the DRB read the Throttle Position Sensor TP Sensor voltage 15 the Throttle Position Sensor voltage below 0 16 volt Yes gt GoTo 2 gt GoTo 8 Ignition Off Disconnect the Throttle Position Sensor Note Check connectors Clean repair as necessary Ignition On Engine Not Running Measure the voltage at the 5 Volt Supply Circuit at TPS Connector 15 the voltage below 4 0 volts Yes Repair the open TP Sensor 5 Volt Supply Circuit Perform Powertrain Verification Test VER 5A No gt GoTo 3 45 DRIVEABILITY P 0122 THROTTLE POSITION SENSOR VOLTAGE LOW Continued APPLICABILITY
240. ct PCM connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the ASD Output Circuit from PCM Connector to Field Connector Is the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the ASD Relay Output Circuit open circuit Perform Powertrain Verification Test VER 3A Ignition Off All Note Battery must be fully charged Note Generator belt tension and condition must be checked before continu ing Disconnect the Generator Field Connector Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the Generator Field Driver Circuit from PCM Connector to Generator Field Connector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Driver Circuit Perform Powertrain Verification Test VER 3A If there are no potential causes remaining the Generator is assumed to be defective View repair options Repair Repair or replace the Generator as necessary Perform Powertrain Verification Test VER 3A Ignition Off Note Battery must be fully charged Note Generator Belt tension and condition must be checked before con tinuing Disconnect the Generator Field Connector Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the ASD Output Circuit from PCM Connector to Field Connector 15 the resistance below
241. ct the Fuel Inlet Strainer 15 the Fuel Inlet Strainer plugged Yes Replace the Fuel Inlet Strainer No GoTo 10 If there are no potential causes remaining the Fuel Pump Module 15 assumed to be defective View repair options Repair Replace the Fuel Pump Module Turn ignition off ALL Warning The fuel system is under a constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Raise vehicle on hoist and disconnect the fuel pressure line at the fuel pump module Install speial 5 16 fuel line adapter tool 6539 between disconnected fuel line and the fuel pump module Attach fuel pressure test gauge to the T fitting on tool 6539 Ignition on With the DRB actuate the ASD Fuel System test and observe the fuel pressure gauge Note Fuel pressure specification is 49 2 psi 5 psi Is the fuel pressure within specification now Yes Repair the restriction the chassis fuel supply line between the 77 DRIVEABILITY 0171 1 1 FUEL SYSTEM LEAN Continued APPLICABILITY Check for any of the following conditions mechanical problems All ENGINE VACUUM must be at least 13 inches in neutral ENGINE VALVE TIMING must be within specifications ENGINE COMPRESSION must be within specifications ENGINE EXHAUST SYSTEM must be free of any restrictions or leaks ENGINE PVC SYSTEM mus
242. ctor Check connectors Clean repair as necessary Is any terminal corroded damaged pushed out or miswired Yes Repair or replace as necessary Perform VERIFICATION TEST VER 5A3 No GoTo 5 Turn Ignition On Engine Off Disconnect the 1 1 02 Sensor Connector Check connectors Clean repair as necessary With the DRB actuate the ASD Relay Using a voltmeter measure the ASD Relay Output Circuit at the O2 Sensor Connector harness side Is the voltage above 10 0 volts Yes gt GoTo 6 No Repair the open ASD Relay Output Circuit Perform VERIFICATION TEST VER 5A3 Using an ohmmeter measure the O2 Sensor Heater Element at the O2 Sensor Connector component side 15 the resistance between 4 and 7 ohms Yes gt GoTo 7 No Replace the 1 1 02 Sensor Perform VERIFICATION TEST VER 5A3 Disconnect the 1 1 O2 Sensor Connector Check connectors Clean repair as necessary Using an ohmmeter measure from the Heater Ground Circuit to ground at the 2 Sensor Connector harness side Is the resistance below 5 0 ohms Yes Replace the 1 1 O2 Sensor Perform VERIFICATION TEST VER 5A3 No Repair the open 1 1 O2 Sensor Ground Circuit Perform VERIFICATION TEST VER 5A3 Disconnect the 1 1 O2 Sensor Connector All Check connectors Clean repair as necessary 63 DRIVEABILITY Symptom P 0137 1 2 O2 SENSOR VOLTAGE SHORTED TO GROUND E When Monitored and Set Condition P 01
243. ctor 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE Using Ohmmeter measure between the Sensor Ground Circuit and Engine 3 0L V6 w o EATX Ground Is the resistance below 5 0 ohms Yes gt GoTo 9 No Repair the open Sensor Ground Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Disconnect the Powertrain Control Module 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE 15 any Terminal damaged pushed out or miswired 3 0L V6 w o EATX Yes Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 10 If there no potential causes remaining the Powertrain Control Module is ENGINE 2 0L assumed to be defective 2 4L 1 4 DOHC View repair options and or ENGINE 3 0L V6 w o EATX Repair Replace the PCM Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Disconnect the VSS Connector 2 4L 1 4 DOHC Disconnect the Powertrain Control Module and or ENGINE Note Check connectors Clean repair as necessary 3 0L V6 w o EATX Using an Ohmmeter measure the VSS Signal Circuit from the PCM to the VSS Connector 15 the resistance below 5 0 ohms Yes gt GoTo 12 No Repair the open Speed Sensor Signal Circuit Perform Powertrain Verification Test VER 5A 155 DRIVEABILITY P 0500 NO VEHICLE SPEED SENSOR SIGNAL Continued ACTION APPLICABILITY Ignition Of
244. d This is a random number that is generated by the PCM at each ignition key cycle The VIN and seed are plugged into a rolling code algorithm that encrypts the valid invalid key mes sage The PCM uses the rolling code algorithm to receive decode and respond to the valid invalid key message sent by the SKIM After sending the valid invalid key massage the SKIM waits 3 5 seconds for a PCM status message from the PCM If the PCM does not respond with a valid key message to the SKIM a fault is detected and a trouble code is stored The SKIS incorporates a warning lamp ALARM SET located in the message center The lamp receives switched ignition voltage and is hardwired to the body control module The lamp is actuated when the SKIM sends a CCD Bus message to the body controller requesting the lamp on The body controller then provides the ground for the lamp The SKIM will request lamp operation for the following bulb checks at ignition on to alert the vehicle operator to a SKIS malfunc tion For all faults except transponder faults and VIN mismatch the lamp remains on steady the event of a tranponder fault the light flashes at a rate of 1 Hz once per second If a fault is pesent the lamp will emain on or flashing for the complete ignition cycle If a fault is stored in SKIM memory which prevents the system form operating properly the PCM will allow the engine to start and run for 2 seconds up tosix times
245. d Set Condition P 0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT When Monitored With the ignition key on Set Condition An open or shorted condition is detected in the Torque Converter Clutch Solenoid Control Circuit POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN TORQUE CONVERTER CLUTCH SOLENOID DEFECTIVE TCC SOLENOID CIRCUIT W H INTERMITTENT DEFECT TCC SOLENOID CIRCUIT W H OBSERVABLE DEFECT TCC SOLENOID CONTROL CIRCUIT OPEN TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND PCM DEFECTIVE TCC SOLENOID CONTROL CIRCUIT ACTION APPLICABILITY Ignition On Engine Not Running TRANSMISSION With the DRB read codes AUTOMATIC Is the Global Good Trip displayed and equal to 0 3 SPD 31TH Yes gt GoTo 2 gt GoTo 7 Ignition Off TRANSMISSION Disconnect the TCC Solenoid Connector AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH Key on With the Voltmeter probe the voltage of the F used I gnition Switch Output Circuit at Solenoid Connector Is the voltage above 10 0 volts Yes gt GoTo 3 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 5A 304 TRANSMISSION P 0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off TRANSMISSION Disconnect the Powertrain Control Module AUTOMATIC Note Check connectors Clean repair as necessary 3 SPD 31TH Key on With the voltmeter probe the T
246. d or ENGINE Ignition On Engine Not Running 3 3L V6 FFV and or With the DRB actuate Fuel System Fuel Pressure should be 43 to 53 psi ENGINE 3 8L V6 Fuel Pressure should be 43 to 53 psi 15 the Fuel Pressure within the specification Yes gt GoTo 2 No gt GoTo 5 Ignition Off Note Make sure the Gear Lever is in neutral and the Park Brakes engaged Start the engine Monitor the Fuel Pressure Gauge in the next step While monitoring the pressure momentarily snap Throttle wide open raising RPM to above 3000 Did the fuel pressure drop below 35 psi at all Yes gt GoTo 3 No Test Complete Ignition Off Inspect the Chassis Fuel Supply Line to the engine for a kink or restriction Is the line kinked or restricted Yes Release the fuel pressure Repair the Fuel Line as necessary Perform Powertrain Verification Test VER 2A gt GoTo 4 237 DRIVEABILITY CHECKING FUEL DELIVERY Continued ACTION APPLICABILITY Ignition Off All Warning The Fuel System must be opened and may be under high pressure Release the fuel pressure Remove the Fuel Pressure Gauge from the Fuel Rail Adjust a shop air hose to 40 psi Remove the Fuel Filter Using shop air inspect the Fuel Filter passage by attempting to blow air through inlet Is the Fuel Filter restricted Yes Replace the Fuel Filter Perform Powertrain Verification Test VER 2A No Replace the Fuel Pump and Regulator Assembly Perfor
247. damaged trigger GINE 3 8L V6 wheel and and or ENGINE accessory drive belts 3 3L V6 FFV Do any of the above causes exist Yes Repair as necessary Perform VERIFICATION TEST VER 5A2 No Test Complete 107 DRIVEABILITY Symptom P 0320 NO CRANK REFERENCE SIGNAL AT PCM ETE When Monitored and Set Condition P 0320 NO CRANK REFERENCE SIGNAL AT PCM When Monitored During cranking with battery voltage between 4 0 volts and 11 6 volts and manifold vacuum present Set Condition No signal from the crank position sensor is present during engine cranking or the cam position signal is present with no crank signal POSSIBLE CAUSES CKP SENSOR DEFECTIVE CRANK POSITION SENSOR GROUND CIRCUIT OPEN CRANKSHAFT NOTCHES DAMAGED FLYWHEEL DAMAGED 8 VOLT SUPPLY CIRCUIT OPEN 8 VOLT SUPPLY CIRCUIT SHORT TO GROUND CKP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND CMP CKP SENSOR WIRING HARNESS INTERMITTENT DEFECT CMP CKP SENSOR WIRING HARNESS OBSERVABLE DEFECT CRANK POSITION SENSOR SIGNAL CIRCUIT OPEN PCM DEFECTIVE PCM DEFECTIVE NO CRANK REF SIG ACTION APPLICABILITY Cycle the ignition off then on All Attempt to start engine With the DRB in Input Output display read the current CMP and CKP states Did the CMP or CKP states change to present while cranking engine Yes gt GoTo 2 gt GoTo 6 Cycle the ignition off then on Attempt to start engine With the DRB in Input Output display read the current
248. de inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 39 DRIVEABILITY Symptom P 0118 ECT SENSOR VOLTAGE TOO HIGH E When Monitored and Set Condition P 0118 ECT SENSOR VOLTAGE TOO HIGH When Monitored With the ignition on Set Condition The engine coolant temperature sensor circuit voltage at PCM cavity 26 goes above 4 9 volts for more than 3 seconds POSSIBLE CAUSES ECT SENSOR DEFECTIVE ECT SENSOR GROUND CIRCUIT OPEN ECT SENSOR SIGNAL CIRCUIT OPEN ECT SENSOR WIRING HARNESS INTERMITTENT DEFECT ECT SENSOR WIRING HARNESS OBSERVABLE DEFECT PCM DEFECTIVE ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read the ECT Sensor voltage Is the ECT Sensor voltage above 4 9 volts Yes gt GoTo 2 gt GoTo 6 Ignition On Engine Not Running Disconnect the ECT Sensor Note Check connectors Clean repair as necessary Connect a jumper wire between the ECT Sensor Signal Circuit and the Sensor Ground Circuit With the DRB read the ECT Sensor voltage 15 the voltage below 1 0 volt Yes Replace the ECT Sensor Perform Powertrain Verification Test VER 5A No GoTo 3 40 DRIVEABILITY P 0118 ECT SENSOR VOLTAGE TOO HIGH Continued ACTION APPLICABILITY Ignition Off All Disconnect the ECT Sensor Electrical Connector Note Check connectors Clean repair as neces
249. des Did the SKIM Internal DTC return Yes Replace the Sentry Key Immobilizer Module Perform the Powertrain Verification Test VER 7A No Test Complete 310 SENTRY KEY IMMOBILIZER SYSTEM Symptom List PCM STATUS FAILURE ROLLING CODE FAILURE SERIAL LINK EXTERNAL FAULT Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be PCM STATUS FAILURE When Monitored and Set Condition PCM STATUS FAILURE When Monitored This condition is monitored at ignition ON and continuously during an ignition ON cycle Set Condition This condition exists when a PCM STATUS bus message was not received from the PCM Note Failure maturity time is 20 seconds ROLLING CODE FAILURE When Monitored At ignition ON after ignition ON during any rolling code handshake that occurs with the PCM due toa SKIM or a PCM reset Set Condition This condition exists when a PCM STATUS message 15 not received by the SKIM within 3 5 seconds of transmitting what the SKIM believes to be key code message to the PCM key code sent by the SKIM may may not be valid in this case SERIAL LINK EXTERNAL FAULT When Monitored At ignition ON after ignition ON during any rolling code handshake that occurs with the PCM due to a SKIM reset a PCM reset or during Secret Key transfers to the PCM Set Condition This condition is set when the SKIM does not receive an expected bus
250. dicking Yes gt GoTo 2 gt GoTo 4 Engine running Wiggle the Wiring Harness from the ASD Relay to the PCM Did the engine die out when wiggling wires Yes Repair circuit as necessary where wiggling caused the engine to die out Perform Powertrain Verification Test VER 2A GoTo 3 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 186 DRIVEABILITY P 1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT Continued APPLICABILITY Ignition Off Remove the ASD Relay Note Check connectors Clean repair as necessary Using a Voltmeter measure the B Circuit at ASD Relay Connector 15 the voltage above 10 0 volts Yes gt GoTo 5 No Repair the open Fused B Circuit Perform Powertrain Verification Test VER 2A Ignition off Remove the ASD Relay Note Check connectors Clean repair as necessary Use an ohmmeter in the following step Measure the resistance across Terminals A 86 and C 85 of the ASD Relay Is the resistance between 50 0 and 90 0 ohms Yes gt GoTo 6 No Replace theASD Relay Perform Powertrain Verification Test VER 2A Ignition Off All Remove the ASD Relay Check Connectors clean repair as necessary Disconnect the PCM Connector Check Connectors clean repair as necessary Use an ohmmeter in the follow
251. e Upstream O2 Sensor Connector and Harness While wiggling the Harness watch the Upstream O2 Sensor voltage Did the O2 Sensor voltage go above 1 2 volts at any time Yes gt Repair the Harness or Connector that has the intermittent short to voltage Perform Powertrain Verification Test VER 5A GoTo 6 Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 7 Ignition Off Disconnect the Upstream O2 Sensor Note Check connectors Clean repair as necessary Inspect connectors 15 any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors No Test Complete 56 DRIVEABILITY Symptom 0133 1 1 025 SLOW RESPONSE When Monitored and Set Condition P 0133 1 1 025 SLOW RESPONSE When Monitored With engine temperature greater than 63 degrees C 147 degrees F after reaching vehicle speed of 16 kmh 10 mph and throttle remaining open off idle for 2 minutes bring vehicle toa stop and allow engine to idle with transmission drive auto or in neutral manual Set Condition The Oxygen Sensor Signal voltage is switching from below 0 27 volt to above 0 62 volt and back fewer times than required POSSIBLE CAUSES ENGINE MECHANICAL PROBLEM 1 1 02 SENSOR GROUND HIGH RESISTANCE 1 1 02 SENSOR GROUND
252. e no potential causes remaining the BCM is assumed to be defective View repair options Repair Replace the Body Control Module Perform Powertrain Verification Test VER 2A 149 DRIVEABILITY P 0462 FUEL LEVEL SENDING UNIT VOLTS TOO LOW Continued ACTION APPLICABILITY Ignition On All Use the schematic as a guide and wiggle the Connector amp Harness Using the DRB monitor the Fuel Level Sensor voltage Was there any Fuel Level Sensor Voltage change Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 2A No gt GoTo 6 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete Perform Powertrain Verification Test VER 2A 150 DRIVEABILITY Symptom P 0463 FUEL LEVEL SENDING UNIT VOLTS TOO HIGH POSSIBLE CAUSES FUEL LEVEL SENSOR DEFECTIVE FUEL LEVEL SENSOR SIGNAL CIRCUIT OPEN FUEL PUMP MODULE WIRING HARNESS INTERMITENT DEFECT BODY CONTROL MODULE DEFECTIVE FUEL PUMP MODULE OBSERVABLE DEFECT FUEL PUMP MODULE GROUND CIRCUIT DEFECTIVE TEST COMPLETE APPLICABILITY Ignition On All With the read the DTC s 15 the Global Good Trip counter dispalyed and equal to zero Yes gt GoTo 2 GoTo 6 Key Off Disconnect the Fuel Pump Module Connector Note Check connectors Clea
253. e procedures can be found in ser manual procedures Following these proce dures is very important to the safety of individuals performing diagnostic tests 4 2 2 VEHICLE PREPARATION FOR TESTING Make sure the vehicle being tested has a fully charged battery If it does not false diagnostic codes or error messages may occur 4 2 3 SERVICING SUB ASSEMBLIES Some components of the powertrain system are intended to be serviced in assembly only Attempt ing to remove or repair certain system sub components may result in personal injury and or improper system operation Only those components with approved repair and installation procedures in the service manual should be serviced 4 2 4 DRBIII SAFETY INFORMATION WARNING EXCEEDING THE LIMITS OF THE DRB MULTIMETER IS DANGEROUS IT CAN EXPOSE YOU SERIOUS INJURY CAREFULLY READ AND UNDERSTAND THE CAUTIONS AND THE SPECIFICATION LIMITS Follow the vehicle manufacturer s service specifi cations at all times Do not use the DRBIII if it has been damaged Do not use the test leads if the insulation is damaged or if metal is exposed e To avoid electrical shock do not touch the test leads tips or the circuit being tested e Choose the proper range and function for the measurement Do not try voltage or current mea surements that may exceed the rated capacity Donot exceed the limits shown in the table below FUNCTION INPUT LIMIT Volts 0 500 peak
254. easure the resistance of the CMP Sensor Signal Circuit from the CMP Sensor Connector to the PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 34 No Repair the open CMP Sensor Signal Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the CMP Sensor Signal Circuit and the 8 Volt Supply Circuit at the CMP Sensor Connector Is the resistance below 5 0 ohms Yes gt Repair the CMP Sensor Signal Circuit for a short to the 8 volt Supply Circuit Perform Powertrain Verification Test VER 5A GoTo 35 Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CMP Sensor Signal Circuit from the CMP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 36 120 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Disconnect the C
255. ecessary 15 any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 4A GoTo 20 269 SPEED CONTROL CHECKING SPEED CONTROL OPERATION Continued ACTION APPLICABILITY Ignition Off Disconnect the Speed Control Servo Connector Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Key and S C on Using a Voltmeter measure the voltage of S C Power Supply Ckt at Brake Switch Conn Is the voltage above 10 0 volts Yes gt GoTo 21 No GoTo 23 Ignition Off Disconnect the Speed Control Servo Connector Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Use an Ohmmeter in the following step Measure the S C Brake Switch Output Ckt from the Brake Switch Conn to Servo Is the resistance below 5 0 ohms Yes gt GoTo 22 No Repair the open S C Brake Switch Output Supply Circuit Perform Powertrain Verification Test VER 4A View repair options Repair Replace the Brake Switch Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Brake Switch Connector Disconnect the PCM Note Check connectors Clean repair as necessary Using an Ohmmeter test the resistance of the S C Power Supply Circuit PCM to Brake Switch Is the resistance below 5 0 ohms Yes gt GoTo 24 No the open S C Power Supply Circuit to Bra
256. ect Ignition Coil Connector Note Check connectors Clean repair as necesary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary With an Ohmmeter measure the Ignition Coil Driver Circuit at the PCM Conn to Ground Is the resistance below 5 0 ohms Yes Repair the Coil Driver Circuit for a short to ground Perform Powertrain Verification Test VER 1A gt GoTo 10 Ignition off ENGINE 3 0L V6 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powetrain Verification Test VER 1A Ignition Off ENGINE 3 0L V6 Disconnect Ignition Coil Connector Note Check connectors Clean repair as necesary Is any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Powertrain Verification Test VER 1A gt GoTo 12 290 STARTING CHECKING THE SECONDARY IGNITION SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary Disconnect the ASD Relay Note Check connectors Clean repair as necessary Using a J umper Wire connect the ASD Relay Output Circuit to Ground at the Ignition Coil Connector With an Ohmmeter mesaure theASD Output Circuit for resistance to Ground at the Relay 15 the resistan
257. ect the Fuel Pump Harness Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary and or ENGINE Caution It is critical that the Fuel Pump Connector has a clean and tight 3 3L V6 FFV and or connection ENGINE 3 3L V6 Ignition On Engine Not Running and or ENGINE Actuate the ASD Fuel System test 3 8L V6 With a Voltmeter measure the Fuel Pump Relay Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 33 No Repair the open Fuel Pump Relay Output Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the Fuel Pump Relay 2 4L 1 4 DOHC Check connectors Clean repair as necessary and or ENGINE Install a substitute Relay of the same part number for the Fuel Pump Relay 3 3L V6 FFV and or Attempt to start the Engine ENGINE 3 3L V6 Does the Engine start and or ENGINE 3 8L V6 Yes Replace the Fuel Pump Relay Perform Powertrain Verification Test VER 1A No gt GoTo 34 Ignition Off ENGINE 2 0L If there potential causes remaining the Fuel Pump 15 assumed to be defective 2 4L 1 4 DOHC View repair options and or ENGINE 3 3L V6 FFV and or ENGINE 3 3L V6 and or ENGINE 3 8L V6 Repair Replace the Fuel Pump Perform Powertrain Verification Test VER 1A 286 STARTING Symptom CHECKING THE IDLE AIR CONTROL MOTOR POSSIBLE CAUSES ENGINE NOT START AND STAY RUNNING IAC MOTOR DEFECTIVE ACTION APPLICABILITY I
258. ect the PCM Connectors Disconnect the BCM Connectors Note Check Connectors clean repair as necessary Using an ohmmeter measure the CCD Circuit for resistance from PCM to the BCM 15 the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open CCD Bus between BCM and PCM Perform Verification Test VER 2A 220 DRIVEABILITY P 1695 NO CCD MESSAGE FROM BODY CONTROLLER Continued ACTION APPLICABILITY Ignition on with engine not running All With the DRB select BCM Does the DRB display show response Yes Replace BCM Perform Verification Test VER 2A No gt GoTo 5 If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Verification Test VER 2A Ignition off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Verification Test VER 2A No Test Complete 221 DRIVEABILITY Symptom List P 1696 PCM FAILURE EEPROM WRITE DENIED P 1697 PCM FAILURE SRI MILE NOT STORED Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be P 1696 PCM FAILURE EEPROM WRITE DENIED POSSIBLE CAUSES POWERTRAIN CONTROL MODULE DEFECTIVE WRITE REFUSED SRI MEMORY INSTRUMENT PANEL ODO MILEAGE SAME SRI MEMORY SRI MILEAGE INVALID SRI MEMORY NEEDS UPDATING PCM DEFECTI
259. ector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CKP Sensor Signal Circuit from the CKP Sensor Connector to the PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 12 No Repair the open Crank Position Sensor Signal Circuit Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the Crank Position CKP Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector 110 DRIVEABILITY P 0320 NO CRANK REFERENCE SIGNAL AT PCM Continued ACTION APPLICABILITY Start the engine Wiggle the Wiring Harness from CMP and CKP Sensors to the Powertrain Control Module Did the engine miss or die out when wiggling Wires Yes Repair Circuit as necessary where wiggling caused the engine to miss or die out Perform Powertrain Verification Test VER 2A GoTo 13 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A gt GoTo 14 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A
260. ed With battery voltage greater than 12 volts the auto shutdown relay energized injector pulse width less than 10ms and engine speed less than 3000 rpm Set Condition This trouble code takes 64 to 10 0 seconds to set when no inductive kick is sensed 18ms after injector turn off and with no other injectors on POSSIBLE CAUSES AUTO SHUTDOWN RELAY OUTPUT CIRCUIT OPEN INJ ECTOR 6 DEFECTIVE RESISTANCE OUT OF RANGE INJ ECTOR 6 DRIVER CIRCUIT OPEN INJ ECTOR 6 DRIVER CIRCUIT SHORTED TO GROUND PCM DEFECTIVE APPLICABILITY Ignition Off ENGINE 3 0L Start engine let idle for at least 20 seconds 3 3L V6 and or EN Key on engine off GINE 3 8L V6 With the DRB read Trouble Codes and or ENGINE 15 the Global Good Trip counter displayed and equal to zero 3 3L V6 FFV Yes gt GoTo 2 gt GoTo 7 Ignition Off ENGINE 3 0L Note It may be necessary to remove the Intake Plenum in the following 3 3L V6 and or EN step GINE 3 8L V6 Disconnect the Injector 6 Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 FFV Using an Ohmmeter measure resistance of Injector 6 15 the resistance between 10 0 and 16 0 ohms Yes gt GoTo 3 No Replace the Fuel Injector Perform Powertrain Verification Test VER 5A 97 DRIVEABILITY P 0206 INJ ECTOR 6 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L Note It may be necessary to remove the
261. ed for change in output sig If no major change or too much change flag is set Repeat test up to 3x in run cycle 2 trips If fails every time code sets If any pass diags are suspended POSSIBLE CAUSES EXHAUST LEAK INTAKE MANIFOLD RESTRICTED EGR BACK PRESSURE TRANSDUCER DEFECTIVE EGR VALVE ASSEMBLY DEFECTIVE EGR VALVE ASSEMBLY MOUNTED INCORRECTLY EGR SYSTEM FAILURE DOES NOT REOCCUR EGR TRANSDUCER LINE BLOCKED EGR VALVE ASSEMBLY DIAPHRAM DEFECTIVE VACUUM SUPPLY TO EGR SOLENOID INADEQUATE APPLICABILITY With the DRB read the DTCs All Is the GLOBAL GOOD TRIP displayed and equal to zero Yes gt GoTo 3 No gt GoTo 2 At this time the EGR System Failure does not exist or is an intermittent problem With the DRB read the FREEZE FRAME With this screen attempt to duplicate the condition that has set this fault While using FREEZE FRAME pay particular attention to the fault setting condi tions such as speed temp load and map vacuum Does the EGR System Failure reoccur Yes gt GoTo 3 No EGR System Failure no longer exists Perform VERIFICATION TEST VER 5A3 131 DRIVEABILITY P 0401 EGR SYSTEM FAILURE Continued ACTION APPLICABILITY Turn off all accessories Start engine allow engine to reach normal operating temperature Disconnect the Vacuum Supply Hose to the EGR Solenoid Connect a vacuum gauge to the disconnected hose Does the gauge read over 10 of vacuum Yes gt GoTo
262. el Pump Replace Fuel Pump Fuse Perform Powertrain Verification Test VER 1A Ignition On All Remove the Fuel Pump Fuse from the PCM With a voltmeter measure the B side of the Fuse Socket Is the voltage above 10 0 volts Yes Repair the opem B circuit between the Fuse and the PCM Perform Powertrain Verification Test VER 1A 275 STARTING Symptom CHECKING THE CAM AND CRANK SENSORS POSSIBLE CAUSES SECONDARY INDICATORS PRESENT ACTION APPLICABILITY Ignition On Engine Not Running Note Address all trouble codes before continuing Note E nsure PCM Connectors are secure With the DRB read the secondary indicators while cranking the engine Were there any secondary indicators present while cranking the engine Yes Refer to Symptom list for further diagnostic test No gt GoTo 2 Ignition On Engine Not Running With the in Input Output display monitor the current CMP and CKP states Crank the engine for at least 15 seconds Does the show current CMP state present while cranking Yes Refer to symptom CHECKING THE SECONDARY IGNITION SYSTEM in the STARTING category No Refer to symptom P 0340 CAM SIGNAL AT PCM in the DRIVEABILITY category Ignition On Engine Not Running All With the DRB in Input Output display monitor the current CMP and CKP states Crank the engine for at least 15 seconds Does the show current CKP state present while cranking Yes g
263. ell when checked Set Condition Peak current is not achieved with 2 5ms of dwell It takes 3 seconds during cranking or up to 6 seconds while running to set POSSIBLE CAUSES ASD OUTPUT CIRCUIT OPEN IGNITION COIL CONNECTOR 38 TERMINAL OBSERVABLE DEF IGNITION COIL 3 DRIVER CIRCUIT OPEN IGNITION COIL DRIVER CIRCUIT SHORTED TO GROUND IGNITION COIL CIRCUIT WIRING HARNESS INTER DEFECT IGNITION COIL CIRCUIT WIRING HARNESS OBS DEFECT IGNITION COIL 3 RESISTANCE NOT ABOVE 2 0 OHMS PCM DEFECTIVE IGN COIL 3 ACTION APPLICABILITY Ignition On Engine Not Running Engine 3 3L V6 With the DRB read codes and or 3 8L V6 Is the Global Good Trip displayed and equal to 0 and or Engine 3 3L V6 FFV Yes gt GoTo 2 GoTo 8 Ignition Off Engine 3 3L V6 Disconnect the Ignition Coil Connector and or 3 8L V6 Note Check connectors Clean repair as necessary and or Engine Key on 3 3L V6 FFV With the actuate Ignition Coil 3 With a Voltmeter probe the ASD Output Circuit Is the voltage above 10 0 volts Yes gt GoTo 3 No Repair the open ASD Output Circuit Perform Powertrain Verification Test VER 2A 128 DRIVEABILITY P 0353 IGNITION COIL 3 PRIMARY CIRCUIT Continued APPLICABILITY Ignition Off Engine 3 3L V6 Disconnect the Coil Connector and or 3 8L V6 Note Check connectors Clean repair as necessary and or Engine 15 any terminal damaged pushed out
264. er measure the Fused B Circuit at Relay Connector 15 the voltage above 10 0 volts Yes gt GoTo 7 No the open Fused B Circuit Check Engine Fuse in PDC Perform Powertrain Verification Test VER 2A Ignition Off Remove the Auto Shutdown Relay Note Check connectors Clean repair as necessary Install a substitute Relay for the Auto Shutdown Relay Attempt to start the Vehicle Did the engine start Yes Replace the original Auto Shutdown Relay Perform Powertrain Verification Test VER 2A No GoTo 8 Ignition Off Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Remove the Auto Shutdown Relay Note Check connectors Clean repair as necessary Using an ohmmeter measure the resistance of the ASD Relay Output Circuit from the Auto Shutdown Relay to the PCM 15 the resistance above 5 0 ohms Yes Repair open ASD Relay Output Circuit Perform Powertrain Verification Test VER 2A No gt GoTo 9 189 DRIVEABILITY P 1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM Continued ACTION APPLICABILITY Ignition off All If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair
265. er Circuit Perform Powertrain Verification Test VER 2A Ignition Off Engine 3 3L V6 If there no potential causes remaining the PCM is assumed to be defective and or 3 8L V6 View repair options and or Engine 3 3L V6 FFV Repair Replace the PCM Perform Powertrain Verification Test VER 2A 129 DRIVEABILITY P 0353 IGNITION COIL 3 PRIMARY CIRCUIT Continued ACTION APPLICABILITY Start Engine Engine 3 3L V6 Wiggle Wiring Harness from the Ignition Coil to the PCM and or 3 8L V6 Does the engine miss or stall and or Engine 3 3L V6 FFV Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 2A No gt GoTo 9 Ignition Off Engine 3 3L V6 Using the schematic as a guide inspect the Wiring and Connectors and or 3 8L V6 Were any problems found and or Engine 3 3L V6 FFV Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 130 DRIVEABILITY Symptom P 0401 EGR SYSTEM FAILURE When Monitored and Set Condition P 0401 EGR SYSTEM FAILURE When Monitored With enginetemp gt than 82 degrees 180 degrees ambient temp gt 4 degrees 40 degrees engine closed loop O2 Sensor operational engine under a steady load with throttle open and O2 Controller not at or near its limits Set Condition If all conditions met turn EGR off amp on O2 Snsr Sig is monitor
266. er the brake switch indicates a low signal POSSIBLE CAUSES BRAKE SWITCH GROUND CIRCUIT OPEN BRAKE SWITCH INTERNAL SHORT BRAKE SWITCH SENSE CIRCUIT OPEN BRAKE SWITCH SENSE CIRCUIT SHORT TO GROUND PCM CONNECTOR OBSERVABLE DEFECT PCM DEF VOLTAGE HIGH PCM DEF VOLTAGE LOW APPLICABILITY Ignition Off All Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Key on With a Voltmeter measure the Brake Switch Sense Circuit at the Brake Switch Connector Is the voltage above 9 0 volts Yes gt GoTo 2 No gt GoTo 5 Ignition Off Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the Brake Switch Ground Circuit at the Brake Switch Connector to ground 15 the resistance below 5 0 ohms Yes gt GoTo 3 No Repair the Brake Switch Ground Circuit Perform Powertrain Verification Test VER 2A 172 DRIVEABILITY P 0703 BRAKE SWITCH STUCK PRESSED OR RELEASED Continued APPLICABILITY Ignition off Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Ignition on with engine not running Monitor Brake Switch status on the DRB while performing the next step Connect a jumper across the Brake Switch Circuit to Ground Circuit Did the change from pressed to released Yes Replace or adjust the Brake Switch Perform Powertrain
267. ertrain control module PCM actuates the vacuum and vent solenoid but they do not respond P 1683 SPEED CONTROL POWER RELAY OR S C 12V DRIVER When Monitored Speed control on vehicle speed gt 25 mph RPM lt 5440 brake not applied For an automatic transmission in drive mode For a manual transmission the clutch not depressed Set Condition The powertrain control module PCM actuates the vacuum and vent solenoids but they do not respond POSSIBLE CAUSES S C BRAKE SWITCH OUTPUT CIRCUIT OPEN S C BRAKE SWITCH OUTPUT CIRCUIT SHORTED TO GROUND S C VACUUM SOLENOID CONTROL CIRCUIT OPEN S C VENT SOLENOID CONTROL CIRCUIT OPEN SPEED CONTROL POWER SUPPLY CIRCUIT OPEN SPEED CONTROL SERVO GROUND CIRCUIT OPEN BRAKE SWITCH DEFECTIVE SPEED CONTROL SERVO DEFECTIVE PCM DEFECTIVE SC SOLENOID CIRCUIT PCM DEFECTIVE SPEED CONTROL P S CIRCUIT BRAKE SWITCH NEEDS TO BE ADJ USTED 256 SPEED CONTROL P 1595 SPEED CONTROL SOLENOID CIRCUITS Continued APPLICABILITY Ignition Off Note A misadjusted Brake Switch can cause this code to set Does the Brake Switch need to be adjusted Yes Adjust Brake Switch as necessary No GoTo 2 Ignition Off Disconnect the Speed Control Servo 4 Way Connector Note Check connectors Clean repair as necessary Note Ensure the Brake pedal is not depressed during the following steps Engine off Ignition key on and S C On Off Switch ON Using a Voltmeter measure the volt
268. es Replace the Powertrain Control Module Perform Powertrain Verification Test VER 4A No GoTo 8 If there are no potential causes remaining the Clockspring is assumed to be defective View repair options Repair Replace the Clockspring Perform Powertrain Verification Test VER 4A Ignition Off All Disconnect the Powertrain Control Module Disconnect the Clockspring 4 way to Harness Note Check connectors Clean repair as necessary Using an ohmmeter test the S C Switch Signal Circuit Clockspring to PCM Is the resistance below 5 0 ohms Yes gt GoTo 7 265 SPEED CONTROL Symptom CHECKING SPEED CONTROL OPERATION POSSIBLE CAUSES BRAKE SWITCH DEFECTIVE GROUND CIRCUIT OPEN S C BRAKE SWITCH OUTPUT CIRCUIT SHORTED TO GROUND SPEED CONTROL BRAKE SWITCH OUTPUT SUPPLY CKT OPEN SPEED CONTROL ON OFF SET SWITCH DEFECTIVE SPEED CONTROL POWER SUPPLY CIRCUIT OPEN SPEED CONTROL POWER SUPPLY CIRCUIT SHORTED GROUND SPEED CONTROL SERVO CONNECTOR OBSERVABLE DEFECT SPEED CONTROL SWITCH DEFECTIVE CLOCK SPRING DEFECTIVE SPEED CONTROL SERVO DEFECTIVE SPEED CONTROL THROTTLE CABLE DEFECTIVE SPEED CONTROL VACUUM SUPPLY LEAKS OR RESTRICTED PCM DEFECTIVE SPEED CONTROL OPERATION VACUUM RESERVOIR DEFECTIVE APPLICABILITY Ignition On Engine Not Running All With the DRB monitor the Speed Control Switch inputs While observing display press the Speed Control ON OFF switch Does the show S C ON OFF switc
269. es C 170 degrees F Set Condition TheUpstream Oxygen Sensor Signal voltage is between 0 35 volt and 0 55 volt for 1 5 minutes POSSIBLE CAUSES 02 SENSOR 1 2 GROUND CIRCUIT OPEN 02 SENSOR 1 2 SIGNAL CIRCUIT OPEN 1 2 2 SENSOR WIRING HARN INTER DEFECT 1 2 2 SENSOR WIRING HARN OBS DEFECT 02 SENSOR 1 2 DEFECTIVE PCM DEFECTIVE APPLICABILITY Ignition Off All Start the engine and allow it to reach normal operating temperature With the DRB in actuator tests set RPM to 1500 In sensors read the Downstream Oxygen Sensor Level Is the Downstream O2 Sensor Level switching Yes gt GoTo 2 No gt GoTo 4 Ignition Off Start the engine and allow it to reach normal operating temperature Using the DRB set the engine speed to 1500 RPM With the DRB read the Downstream O2 Sensor state Wiggle Downstream O2 Sensor Connector and Harness While wiggling the Harness monitor the DRB display At any time was the Downstream O2 Sensor state locked at center Yes Repair the open Harness or Connector that caused the O2 Sensor state to stay at center Perform Powertrain Verification Test VER 5A No gt GoTo 3 71 DRIVEABILITY P 0140 1 2 O2 SENSOR STAYS AT CENTER Continued ACTION APPLICABILITY Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ig
270. esets or the OBDII monitor fails after running or if any other symptom or DTC is present return to the symptom list and perform the appropriate diagnostic testing procedures Refer to any Technical Service Bulletins that mat apply 5 If the monitor runs test does not fail the condition is no longer present 6 If there are no DTCs and all components are functioning properly the repair is complete 321 VERIFICATION TESTS Verification Tests Continued Powertrain Verification Test VER 7A SKIS Verfication Use this test to verify that SKIM system symptom has been repaired and that the vehicle can be returned to the customer Note If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programmig information for the PCM SKIM and the Transponder ignition key 1 1 nspect the vehicle to ensure that all components related to the repair are connected properly 2 Inspect the engine oil for fuel contamination Replace the oil and filter as necessary 3 Start the engine 4 Run the engine for one warm up cycle to verify proper operation With the DRBII1 confirm that no DTCs are present and that all components are functioning properly If the D
271. essure Regulator Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Release the Fuel pressure Inspect Fuel Return Tube for restriction between fuel Filter and Fuel Pump Module 15 there restriction Yes Replace restricted Fuel Tube Perform Powertrain Verification Test VER 1A No Test Complete Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Relieve Fuel pressure Fuel Pressure Gauge into the Fuel Hose using tool 6433 Note The Fuel Tank must be at least 1 4 full for the following tests Ignition On Engine Not Running With the DRB actuate the Fuel System Read the Fuel Pressure Gauge Fuel pressure should be 43 to 53 psi for Gasoline 15 the Fuel pressure below the specification Yes gt GoTo 9 No Test Complete Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and be under high pressure Release Fuel pressure Remove adapter 6631 and reinstall Fuel Line Install adapter 6631 between Fuel Pump and Fuel Filter Connect Fuel Pressure Gauge to adapter 6631 Key on With the DRB actuate Fuel System 15 the fuel pressure at least 2 psi higher than the previous reading Yes Replace the Fuel Filter Perform Powertrain Verification Test VER 1A No GoTo 10 280 STARTING CHECKING THE FUEL SYSTEM Continued
272. est VER 1A No GoTo 23 Ignition On Engine Not Running ENGINE 2 0L With the DRB actuate Ignition Coil 1 2 4L 1 4 DOHC With a Voltmeter measure the ASD Relay Output Circuit Is the voltage above 10 volts Yes Replace Coil Perform Powertrain Verification Test VER 1A No gt GoTo 24 Ignition Off ENGINE 2 0L Disconnect the Ignition Coil Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Disconnect the ASD Relay Note Check connectors Clean repair as necessary Using a J umper Wire connect the ASD Relay Output Circuit to Ground at the Ignition Coil Connector With Ohmmeter measure the ASD Relay Output Circuit for resistance to ground at the Relay Is the resistance below 5 0 ohms Yes gt GoTo 25 No Repair open ASD Relay Output Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 2 0L Disconnect the ASD Relay 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary With a Voltmeter measure the F used Circuit cavity in ASD Relay Connector 15 the Voltage above 10 volts Yes Replace the Auto Shutdown Relay Perform Verification Test VER 1A No Repair open Fused Perform Verification TEST VER 1A 293 STARTING CHECKING THE SECONDARY IGNITION SYSTEM Continued APPLICABILITY Ignition Off ENGINE 2 0L Disconnect the Spark Plug Cable at Spark
273. etween the 5 volt Supply Circuit and the Throttle Position Sensor Signal Circuit at the Throttle Position Sensor Connector Is the resistance below 5 0 ohms Yes Repair the Throttle Position Sensor Signal Circuit shorted to the 5 volt Supply Circuit Perform Powertrain Verification Test VER 5A GoTo 4 Turn the Ignition Off Disconnect the TCM harness connector Turn the Ignition On Using the DRB monitor the TP sensor voltage Is the voltage below 1 0 volt Yes Replace the Transmission Control Module gt GoTo 5 Ignition Off Disconnect the Throttle Position Sensor Connector Note Check connectors Clean repair as necessary Connect a jumper wire between the Throttle Position Sensor Signal Circuit and Sensor Ground Circuit Ignition on engine not running Using the DRB read the Throttle Position Sensor voltage 15 the voltage below 1 0 volt Yes Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 6 Ignition Off Disconnect the TPS Electrical Connector Note Check connectors Clean repair as necessary Connect a jumper wire between the TPS Signal Circuit and a good engine ground Ignition on engine not running Using the DRB read the Throttle Position Sensor voltage 15 the voltage below 1 0 volt Yes Repair the open Throttle Position Sensor Ground Circuit Perform Powertrain Verification Test VER 5A gt GoTo 7 49 DRIVEABI
274. f ENGINE 2 0L Disconnect the VSS Connector 2 4L 1 4 DOHC Disconnect the Powertrain Control Module and or ENGINE Note Check connectors Clean repair as necessary 3 0L V6 w o EATX With the DRB in Ohmmeter mode measure between the VSS Signal Circuit in the Powertrain Control Module Connector 15 the resistance below 5 0 ohms Yes Repair the Speed Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A gt GoTo 13 If there are no potential causes remaining the Powertrain Control Module is ENGINE 2 0L assumed to be defective 2 4L 1 4 DOHC View repair options and or ENGINE Repair 3 0L V6 w o EATX Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Raise the Drive Wheels off the ground 2 4L 3 3L V6 FFV Werning Be sure to keep hands and feet clear of rotating wheels and or ENGINE Start Engine 3 3L V6 and or EN With DRB read the Vehicle Speed Sensor GINE 3 8L V6 Put Transmission on any forward gear w EATX Does the DRB show above zero MPH Yes gt GoTo 15 No gt GoTo 16 Ignition off ENGINE 2 0L Using the Schematic as a guide inspect the Wiring and Connectors 2 4L 3 3L V6 FFV Were any problems found and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition On Engine Not Running ENGI
275. ff Using a Voltmeter measure the voltage between the Generator Case and Battery side Caution Ensure all Wires are clear of the engine s moving parts Start the engine 15 the voltage above 0 4 volt Yes gt Repair Generator Ground high resistance Generator Case to Battery side Perform Powertrain Verification Test VER 3A GoTo 6 Ignition Off All Connect Voltmeter between the Generator 12V B Terminal and the Battery side Caution Ensure all Wires are clear of the engine s moving parts Start the engine 15 the voltage above 0 4 volt Yes Repair the B Circuit for high resistance between the Generator and Battery Perform Powertrain Verification Test VER 3A GoTo 7 Turn engine off ignition key on With the DRB read Battery voltage and record Using a Voltmeter measure Battery voltage B to B Terminal Record second voltage reading Compare the two voltage readings 15 the voltage difference less than one volt Yes gt Test Complete Perform Powertrain Verification Test VER 3A No GoTo 8 Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using a voltmeter measure the fused B at PCM 15 the voltage within one volt of the DRB recorded reading Yes Repair the B Circuit for high resistance between the PCM the Battery Perform Powertrain Verification Test VER 3A GoTo 9 25 CHARGING CHECKING CHARGING SYS
276. g the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition On Engine Not Running Wiggle the Wiring Harness from the MAP Sensor to the Powertrain Control Module Monitor the MAP Sensor voltage with the DRB while wiggling the Wiring Harness Did the voltage go below 2 2 volts Yes Repair Wiring as necessary where wiggling caused voltage drop Perform Powertrain Verification Test VER 2A GoTo 12 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 29 DRIVEABILITY Symptom P 0107 MAP SENSOR VOLTAGE TOO LOW When Monitored and Set Condition P 0107 MAP SENSOR VOLTAGE TOO LOW When Monitored With engine rpm above 400 but less than 1500 and the TP Sensor voltage less than 1 0 volt Set Condition Sensor Signal voltage is below 1 2 volts at start or below 02 volt for 1 76 seconds with engine running POSSIBLE CAUSES MAP SENSOR CONN WIRING HARNESS INTERMITTENT DEF MAP SENSOR CONN WIRING HARNESS OBSERVABLE DEFECT MAP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND MANIFOLD ABSOLUTE PRESSURE SENSOR DEFECTIVE POWERTRAIN CONTROL MODULE DEFECTIVE MAP SENSOR SIGNAL CIRCUIT OPEN MAP SENSOR SIGNAL CKT SHORTED TO SENSOR GROUND CKT ACTION APPLICABILITY Ignition On Engine Not
277. ge does not exceed 0 53 volts and does not fall below 0 35 volts once during the drive cycle POSSIBLE CAUSES ENGINE MECHANICAL PROBLEM 1 2 2 SENSOR GROUND HIGH RESISTANCE 1 2 2 SENSOR GROUND CKT POOR CONNECTION 1 2 2 SENSOR SIGNAL HIGH RESISTANCE 1 2 2 SENSOR SIGNAL POOR CONNECTION 1 2 2 SENSOR SLOW RESPONSE EXHAUST LEAK 1 2 25 SLOW RESPONSE DOES NOT REOCCUR ACTION APPLICABILITY With the DRB read the DTCs All Is the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 5 No gt GoTo 2 Turn Ignition On Engine Off During the following voltage drop measurement wiggle wires between O2S Connec tor and PCM Connector Using a voltmeter backprobe 025 Sensor Ground Circuit between 025 Connector Sensor Ground and PCM Connector Sensor Ground While wiggling wires is the voltage drop reading below 0 10 VDC Yes gt GoTo 3 No Repair poor connection high resistance on O2 Sensor Ground Circuit Perform VERIFICATION TEST VER 5A3 68 DRIVEABILITY P 0139 1 2 O2S SLOW RESPONSE Continued ACTION APPLICABILITY Turn Ignition On Engine Off During the following voltage drop measurement wiggle wires between O2S Connec tor and PCM Connector Using a voltmeter backprobe O2S Signal Circuit between 025 Connector 025 Signal and PCM Connector 025 Signal While wiggling wires is the voltage drop reading below 0 10 VDC Yes gt GoTo 4 No Repair
278. ggle Test Note The idle speed should raise and lower with the display Wiggle the Wiring Harness from the IAC Motor to the PCM Observe for the IAC Motor to stop operating Did the IAC Motor stop operating at any time Yes Repair the Harness or Connectors as necessary Perform Powertrain Verification Test VER 5A No GoTo 5 Start engine and let idle Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using a Voltmeter measure the IAC Driver 1 Circuit Was the voltage over 5 0 volts at any time Yes gt GoTo 7 No Refer to symptom 0505 IDLE AIR CONTROL MOTOR CIR CUIT in the DRIVEABILITY category Ignition Off Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure between IAC 4 Driver and ground Is the resistance below 5 0 ohms Yes Repair the AC 4 Driver Circuit shorted to ground Perform Powertrain Verification Test VER 5A Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete No GoTo 8 160 DRIVEABILITY P 0505 IDLE AIR CONTROL MOTOR CIRCUITS Continued ACTION APPLICABILITY Start engine and let idle Disconnect the IAC Motor Connector Note Check connectors Clean repair as necessary Using a Voltmeter measure the IA
279. gnition Off All Hold the Engine Throttle 1 4 of the way down Attempt to start the Engine Does the Engine start and stay running Yes gt GoTo 2 No Refer to Symptom list for further diagnostic tests Ignition Off Remove the Motor Turn key on With the in Actuator Tests actuate the IAC Stepper Motor Observe the Pintle of the Motor Is the IAC Motor Pintle moving in and out Yes Test Complete No Note Ensure there are no IAC Motor related Trouble Codes Before Making the following repair Replace the IAC motor Perform Powertrain Verification Test VER 1A 287 STARTING Symptom CHECKING THE SECONDARY IGNITION SYSTEM POSSIBLE CAUSES GOOD SPARK AT SPARK PLUG 1 AUTO SHUTDOWN RELAY OUTPUT CIRCUIT OPEN AUTO SHUTDOWN RELAY OUTPUT CIRCUIT OPEN COIL SECONDARY CABLE DEFECTIVE FUSED B CIRCUIT OPEN FUSED B CIRCUIT OPEN IGNITION COIL CONNECTOR OBSERVABLE DEFECT IGNITION COIL CONNECTOR OBSERVABLE DEFECT IGNITION COIL DEFECTIVE IGNITION COIL SECONDARY CABLE 1 DEFECTIVE IGNITION COIL SECONDARY CABLE 4 DEFECTIVE SECONDARY IGNITION COMPONENT S DEFECTIVE SPARK PLUG CABLE 1 DEFECTIVE AUTO SHUTDOWN RELAY DEFECTIVE AUTO SHUTDOWN RELAY DEFECTIVE IGNITION COIL DEFECTIVE IGNITION COIL DEFECTIVE RESISTANCE OUT OF RANGE SPARK PLUG 1 OR 4 DEFECTIVE GOOD SPARK AT SPARK PLUG 1 GOOD SPARK AT SPARK PLUG 1 ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Disconnect the Spark Plug Cable
280. h Yes gt GoTo 2 No Refer to symptom SPEED CONTROL ON OFF SWITCH the SPEED CONTROL category Ignition On Engine Not Running Press the S C ON OFF button to select S C ON With the DRB monitor the Speed Control Switch inputs While observing the DRB press the ACCEL RESUME CANCEL and DECEL switches several times Do all of the Switches toggle correctly between pressed and released Yes gt GoTo 3 No GoTo 25 266 SPEED CONTROL CHECKING SPEED CONTROL OPERATION Continued ACTION APPLICABILITY Ignition On Engine Not Running Press the S C ON OFF button to select S C ON With the DRB monitor the Speed Control Switch inputs While observing display press the Set Switch several times Does the DRB show the Set Switch pressed and released Yes gt GoTo 4 No Replace the Speed Control On Off Set Switch Perform Powertrain Verification Test VER 4A Ignition On Engine Not Running With the DRB monitor the Speed Control Switch inputs While observing display press the Brake Pedal several times Does the DRB show Brake Switch Status change between pressed and released Yes gt GoTo 5 No Refer to symptom SPEED CONTROL BRAKE SWITCH OUT PUT in the SPEED CONTROL category Ignition On Engine Not Running With the DRB monitor the Speed Control Switch inputs While observing the display move the Gear Selector to Drive Does the DRB show the Park Neutral Switch in
281. he problem is found For definitions see Section 6 0 Glossary of Terms SYMPTOM HARD START START AND STALL DIAGNOSTIC TEST CHECKING THE 5 VOLT SUPPLY CIRCUIT CHECKING SECONDARY IGNITION SYSTEM CHECKING ENGINE VAC UUM CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING ENGINE ME CHANICAL SYSTEMS CHECKING EVAP EMISSION SYSTEM CHECKING EGR SYSTEM CHECKING IAT SENSOR CHECKING THE 5 VOLT SUPPLY CIRCUIT CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION CHECKING THROTTLE PO SITION SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW HESITATION SAG STUMBLE SURGE CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING THE 5 VOLT SUPPLY CIRCUIT CHECKING SECONDARY IGNITION SYSTEM CHECKING PCM POWER AND GND CKT CHECKING ENGINE VAC UUM CHECKING THE FUEL PRESSURE CHECKING COOLANT SEN SOR CALIBRATION CHECKING THROTTLE PO 5 SENSOR CALIBRA TION CHECKING MAP SENSOR CALIBRATION CHECKING THE MINIMUM IDLE AIR FLOW CHECKING FOR OXYGEN SENSOR SWITCHING CHECKING 025 HEATER CHECKING IDLE AIR CON TROL MOTOR OPERATION CHECKING ENGINE ME
282. he Engine Vacuum Supply Hose at the LDP Disconnect the PCM Note Check connectors Clean repair as necessary Key on With voltmeter connected to LDP switch sense circuit at PCM connector ground the LDP solenoid control circuit Then while applying vacuum to LDP with a hand vacuum pump observe voltmeter Did the voltage change Yes gt GoTo 9 No gt Replace the LDP Perform Powertrain Verification Test VER 5A Ignition Off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 208 DRIVEABILITY Symptom P 1495 LEAK DETECTION PUMP SOLENOID CIRCUIT When Monitored and Set Condition P 1495 LEAK DETECTION PUMP SOLENOID CIRCUIT When Monitored Immediately after a cold start with ambient temperature between 4 deg C 40 deg F and 32 deg C 90 deg F and coolant temperature within 12 deg C 10 deg of ambient temperature Set Condition The state of the solenoid does not change POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN LDP DEFECTIVE LDP SOLENOID CKT WIRING HARNESS INTERMITTENT DEF LDP SOLENOID CKT WIRING HARNESS OBSERVABLE DEFECT LDP SOLENOID CONTROL CIRCUIT OPEN LDP SOLENOID CONTROL CIRCUIT SHORT TO GROUND PCM DEFECTIVE NO POSSIBLE CAUSES REMAINING ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB actuate the LDP Pump Solenoid Is it clicking
283. he PCM grey connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the A C Clutch Control Circuit from the PCM connector to ground 15 the resistance below 5 0 ohms Yes Repair the Air Conditioning Clutch Relay Control Circuit for a short to ground Perform Powertrain Verification Test VER 2A GoTo 7 Ignition Off Disconnect the PCM grey connector Remove the Air Conditioning Clutch Relay Note Check connectors Clean repair as necessary Using an ohmmeter measure the resistance of the Air Conditioning Clutch Relay Control Circuit from the relay to the PCM Is the resistance below 5 0 ohms Yes gt GoTo 8 No Repair open Air Conditioning Clutch Relay Control Circuit Perform Powertrain Verification Test VER 2A Ignition Off If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A 171 DRIVEABILITY Symptom P 0703 BRAKE SWITCH STUCK PRESSED OR RELEASED When Monitored and Set Condition P 0703 BRAKE SWITCH STUCK PRESSED OR RELEASED When Monitored With engine running The PCM expects the signal to be high for 16 cycles while it monitors the brake switch signal during accel and decel modes Set Condition After the vehicle speed increases the PCM must accumulate 6 seconds while delta throttle voltage is above 0 02 volt The count is reset to zero whenev
284. he auto shutdown relay energized injector pulse width less than 10ms and engine speed less than 3000 rpm Set Condition This trouble code takes 64 to 10 0 seconds to set when no inductive kick is sensed 18ms after injector turn off and with no other injectors on POSSIBLE CAUSES ASD RELAY OUTPUT CIRCUIT OPEN INJ ECTOR DEFECTIVE INJ ECTOR 2 DRIVER CIRCUIT OPEN INJ ECTOR 2 DRIVER CIRCUIT SHORTED TO GROUND PCM DEFECTIVE ACTION APPLICABILITY Ignition Off All Start engine let idle for at least 20 seconds Key on engine off With the DRB read Trouble Codes Is the Global Good Trip counter displayed and equal to zero Yes gt GoTo 2 gt GoTo 7 Ignition Off Note It may be necessary to remove the Intake Plenum in the following steps Disconnect the Injector 2 Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure resistance of Injector 2 Is the resistance between 10 0 and 16 0 ohms Yes gt GoTo 3 Replace the Fuel Injector Perform Powertrain Verification Test VER 5A 86 DRIVEABILITY P 0202 INJ ECTOR 2 CONTROL CIRCUIT Continued ACTION APPLICABILITY Note It may be necessary to remove the Intake Plenum in the following steps Ignition Off Disconnect the Injector 2 Connector Note Check connectors Clean repair as necessary Turn ignition on With the DRB actuate the Auto Shutdown Relay Using a Voltmeter measure the ASD Relay
285. he engine speed to 1500 RPM With the engine RPM at 1500 read MAP sensor voltage While monitoring the voltage wiggle the wiring from the MAP Sensor to PCM Did the engine stall or voltage become erratic Yes Repair the Wiring or Connector defective between the Sensor and the PCM Perform Powertrain Verification Test VER 5A Test Complete 184 DRIVEABILITY P 1297 NO CHANGE IN MAP FROM START TO RUN Continued ACTION APPLICABILITY If there are no potential causes remaining the MAP Sensor is assumed to be All defective View repair options Repair Replace the MAP sensor Perform Powertrain Verification Test VER 5A 185 DRIVEABILITY Symptom P 1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT te When Monitored and Set Condition P 1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT When Monitored With ignition key on and battery voltage greater than 10 volts Set Condition POSSIBLE CAUSES FUSED B CIRCUIT OPEN AUTO SHUTDOWN RELAY RESISTANCE gt 100 0 OHMS ASD RELAY CONTROL CIRCUIT WIRING HARNESS INTER DEF ASD RELAY CONTROL CIRCUIT WIRING HARNESS OBSER DEF AUTO SHUTDOWN RELAY CONTROL CIRCUIT OPEN AUTO SHUTDOWN RELAY CONTROL CIRCUIT SHORT TO GROUND PCM DEFECTIVE AUTO SHUTDOWN RELAY CONTROL CIRCUIT ACTION APPLICABILITY Ignition on Engine Not Running All The ASD Relay is referred to as the Low Pressure Shutoff Relay in CNG applications With the DRB actuate the Auto Shutdown Relay Is the ASD Relay
286. hen Monitored Ignition key on engine not running Ambient temperature greater than 11 C 11 F and coolant temperature greater than 7 C 19 F Set Condition The engine does not warm to 79 degrees C 176 degrees F while driving for 20 minutes after start POSSIBLE CAUSES ENGINE COLD TOO LONG APPLICABILITY Start Engine All Drive vehicle under normal driving conditions for 20 minutes With the DRB read Engine Coolant Temperature Did the engine warm to 79 degrees C 176 degrees F Yes Test Complete No See pertinent service manual information for cooling system diagnostics 177 DRIVEABILITY Symptom P1282 FUEL PUMP RELAY CONTROL CIRCUIT E When Monitored and Set Condition P 1282 FUEL PUMP RELAY CONTROL CIRCUIT When Monitored With the ignition key on and battery voltage greater than 10 volts Set Condition An open or shorted condition is detected in the fuel pump relay control circuit POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN FUEL PUMP RELAY DEFECTIVE FUEL PUMP RELAY CONTROL CIRCUIT OPEN FUEL PUMP RELAY CONTROL CIRCUIT SHORT TO GROUND FUEL PUMP RELAY WIRING HARNESS INTER DEF FUEL PUMP RELAY WIRING HARNESS OBS DEF PCM DEFECTIVE ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB actuate the Fuel Pump Relay Is the Fuel Pump Relay clicking Yes gt GoTo 2 gt GoTo 4 Ignition On Engine Not Running With the DRB actuate
287. hen the vehicle is operating in the SIMILAR CONDITIONS window go to the and or ENGINE WHICH CYLINDER IS MISFIRING monitor 3 3L V6 FFV Is the DRB counting mis fires at this time Yes gt GoTo 4 No gt GoTo 3 At this time the mis fire does not exist or is an intermittent problem ENGINE 3 0L V6 With the DRB read the FREEZE FRAME DATA and SIMILAR CONDITIONS and or ENGINE WINDOW 3 3L V6 and or EN With these screens attempt to duplicate the condition that has set this fault GINE 3 8L V6 While using FREEZE FRAME DATA pay particular attention to the fault setting and or ENGINE conditions such as speed temp load and map vacuum 3 3L V6 FFV Does the mis fire reoccur Yes gt GoTo 4 No Mis fire no longer exists Perform VERIFICATION TEST VER 5A2 With the DRB read the FREEZE FRAME DATA ENGINE 3 0L V6 Use the freeze frame data and attempt to determine the cause of the misfire and or ENGINE In the FREEZE FRAME are the adaptive fuel percentages greater than 15 3 3L V6 and or EN percent GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 5 gt GoTo 10 With an appropriate container obtain a fuel sample from the vehicle ENGINE 3 0L V6 15 the fuel free from contamination and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 6 Replace contaminated fuel and clean system Perform VERIFICATION TEST VER 5A2 Perform Fuel Pressure Leak Dow
288. hile using FREEZE FRAME pay particular attention to the fault setting condi tions such as speed temp load and map vacuum Does the Evap Leak Monitor Pinched Hose Found reoccur Yes gt GoTo 3 No Leak Monitor Pinched Hose Found no longer exists Perform VERIFICATION TEST VER 6A 200 DRIVEABILITY P 1486 EVAP LEAK MONITOR PINCHED HOSE FOUND Continued ACTION APPLICABILITY To perform this test you will need Miller Tool Kit 6872A and 6922 All Caution Refer to safety information Perform Evaporative System Pressure Pump Self Test that is specified on the tester cover Connect the Pressure Pump Supply to Gas Cap Adapter and install on vehicle Start Engine With the DRB go to LDP SYSTEM TEST and follow instructions on the screen Using Pressure Tool 6872A set Pressure Hold to Open and set Vent to Closed Turn Pump Timer On Allow Pressure Pump to build pressure to at least 14 H20 Remove Vacuum Connector from Purge Solenoid Did the pressure drop when the Vacuum Connector was removed Yes gt GoTo 4 gt GoTo 6 To perform this test you will need Miller Tool Kit 6872A and 6922 Caution Refer to safety information Perform Evaporative System Pressure Pump Self Test that is specified on the tester cover Connect the E vap Pressure Pump Supply to Gas Cap Adapter and install on vehicle Start Engine With the DRB go to LDP SYSTEM TEST and follow instructions on the scree
289. ication Test VER 2A 233 DRIVEABILITY Symptom CHECKING FOR OXYGEN SENSOR SWITCHING POSSIBLE CAUSES 02 SENSOR SIGNAL CIRCUIT SHORTED TO GROUND ENGINE VACUUM ABNORMAL FUEL DELIVERY SYSTEM DEFECTIVE 02 SENSOR DEFECTIVE AIR INLET SYSTEM RESTRICTED APPLICABILITY Engine Running Note the Engine must be running and at normal operating temperature Note The Downstream O2 Sensor should switch slower than the Upstream O2 Sensor With the DRB read the O2 Sensor voltages for 10 seconds or more Are the 02 Sensor voltages switching normally Yes Test Complete No gt GoTo 2 Ignition On Engine Not Running With the DRB read the O2 Sensor Signal voltages 15 the voltage below 0 10 volts for the Upstream or Downstream O2 Sensor Yes gt GoTo 4 No gt GoTo 7 Engine Running Allow the Engine to idle Inspect the Engine for any abnormal vacuum conditions Are there any abnormal vacuum conditions Yes Repair abnormal Engine Vacuum condition as required Perform Powertrain Verification Test VER 2A Engine Running All Note The Engine must be running and at normal operating temperature Note The Downstream O2 Sensor should switch slower than the Upstream O2 Sensor With the DRB read the O2 Sensor voltages for 10 seconds or more 15 the Upstream O2 Sensor locked LEAN Yes gt GoTo 3 No GoTo 9 No GoTo 5 234 DRIVEABILITY CHECKING FOR OXYGEN SENSOR SWITCHING Continued
290. ication Test VER 2A No Replace the Fuel Pump and Regulator Assembly Perform Powertrain Verification Test VER 2A All All Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Relieve the Fuel Pressure Tee in Fuel Pressure Gauge into the Fuel Supply Hose using Tool 6433 Turn Ignition On With the DRB actuate the ASD Fuel System test Record the Fuel Pressure reading 15 the Fuel Pressure above 53 psi Yes gt GoTo 16 No gt GoTo 18 Ignition Off Werning The Fuel System must be opened and may be under high pressure Release the fuel pressure Remove the Fuel Pressure Gauge from the Fuel Rail Remove the Fuel Return Line between the Fuel Tank and Filter Adjust a shop air hose to 40 psi Using shop air inspect the Fuel Line by attempting to blow air through it 15 the Fuel Return Line restricted Yes Replace the Fuel Return Line Perform Powertrain Verification Test VER 2A No GoTo 17 there are no potential causes remaining the Fuel Pressure Regulator is assumed to be defective View repair options Repair Replace the Fuel Pressure Regulator Perform Powertrain Verification Test VER 2A 240 DRIVEABILITY CHECKING FUEL DELIVERY Continued APPLICABILITY Ignition Off ENGINE 3 0L V6 Inspect the Chassis Fuel Supply Line to engine for a kink or restriction 15 the Fuel Line kinked or restricted Yes Release the Fuel Pressure Re
291. ine miss or stall Yes Repair as necessary where wiggling caused the problem to appear Perform Powertrain Verification Test VER 5A GoTo 8 93 DRIVEABILITY P 0204 INJ ECTOR 4 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off ALL Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 94 DRIVEABILITY Symptom 0205 ECTOR 5 CONTROL CIRCUIT When Monitored and Set Condition P 0205 INJ ECTOR 5 CONTROL CIRCUIT When Monitored With battery voltage greater than 12 volts the auto shutdown relay energized injector pulse width less than 10ms and engine speed less than 3000 rpm Set Condition This trouble code takes 64 to 10 0 seconds to set when no inductive kick is sensed 18ms after injector turn off and with no other injectors on POSSIBLE CAUSES ASD RELAY OUTPUT CIRCUIT OPEN ECTOR DEFECTIVE INJ ECTOR DRIVER CIRCUIT OPEN INJ ECTOR DRIVER CIRCUIT SHORT TO GROUND PCM DEFECTIVE APPLICABILITY Ignition Off ENGINE 3 0L Start engine let idle for at least 20 seconds 3 3L V6 and or EN Key on engine off GINE 3 8L V6 With the DRB read Trouble Codes and or ENGINE 15 the Global Good Trip counter displayed and equal to zero 3 3L V6 FFV Yes gt GoTo 2 gt GoTo 7 Ignition Off ENGINE 3 0L Disconnect In
292. ine to the solenoid to the gas tank Are all vacuum hoses OK Yes gt GoTo 4 No Repair the vacuum hoses as necessary Perform VERIFICATION TEST VER 5A3 138 DRIVEABILITY P 0441 EVAP PURGE FLOW MONITOR FAILURE Continued ACTION APPLICABILITY Remove Purge Solenoid and tap the ports against a clean solid surface All Did any foreign material fall out Yes gt GoTo 5 No Replace the Purge Solenoid Perform VERIFICATION TEST VER 5A3 Inspect the line from the Purge Solenoid to the Canister 15 the line disconnected ripped or cut Yes Repair the line and replace Purge Solenoid Perform VERIFICATION TEST VER 5A3 No Clean out line and replace Purge Solenoid and Canister Perform VERIFICATION TEST VER 5A3 139 DRIVEABILITY Symptom List P 0442 EVAP LEAK MONITOR SMALL LEAK DETECTED P 0455 EVAP LEAK MONITOR LARGE LEAK DETECTED Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be P 0442 EVAP LEAK MONITOR SMALL LEAK DETECTED eee When Monitored and Set Condition P 0442 EVAP LEAK MONITOR SMALL LEAK DETECTED When Monitored See III Set Condition See 111 P 0455 EVAP LEAK MONITOR LARGE LEAK DETECTED When Monitored See III Set Condition See 111 POSSIBLE CAUSES EVAP SYSTEM HOSES OR WIRING DAMAGED EVAP SYSTEM COMPONENT LEAKING LEAK DETECTION PUMP LEAKING EVAP LEAK MONITOR SMALL OR LARGE DOES NOT REOCCUR
293. ing step Using an ohmmeter measure the resistance of the ASD Relay Control Circuit from the ASD Relay to the PCM Connector Is the resistance below 5 0 ohms Yes gt GoTo 7 No gt Repair the open ASD Relay Control Circuit Perform Powertrain Verification Test VER 2A Ignition off Remove the ASD Relay Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the ASD Relay Control Ckt to ground Is the resistance below 5 0 ohms Yes Repair the ASD Relay Control Circuit for a short to ground Perform Powertrain Verification Test VER 2A No GoTo 8 If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A 187 DRIVEABILITY Symptom P 1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM E When Monitored and Set Condition P 1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM When Monitored With ignition key on and battery voltage greater than 10 volts Set Condition Engine running and no ASD Relay Output Sense at PCM POSSIBLE CAUSES FUSED B CIRCUIT OPEN ASD RELAY DEFECTIVE ASD RELAY OUT CKT WIRING HARNESS OBSERVABLE DEFECT ASD RELAY OUTPUT CIRCUIT OPEN ENGINE STARTED ASD RELAY OUTPUT CKT OPEN ENGINE DID NOT START ASD RLY OUT CKT WIRING HARNESS INTERMITTENT DEFECT PCM DEFECTIVE
294. ion on 3 SPD 31TH With the DRB actuate the TCC Solenoid With the DRB read codes Wiggle Wiring Harness from the Solenoid to PCM Does the TCC Solenoid Control Circuit code return Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 5A No gt GoTo 8 305 TRANSMISSION P 0743 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT Continued APPLICABILITY Ignition Off TRANSMISSION Using the schematic as a guide inspect the Wiring and Connectors AUTOMATIC Were any problems found 3 SPD 31TH Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete 306 TRANSMISSION Symptom P 1899 PARK NEUTRAL SWITCH STUCK IN PARK OR IN GEAR E When Monitored and Set Condition P 1899 PARK NE UTRAL SWITCH STUCK IN PARK OR IN GEAR When Monitored With the transmission in Park Neutral or Drive and not in limp in mode Set Condition This code 15 set if the PCM detects an incorrect Park Neutral switch state for a given mode of vehicle operation in two consecutive failures POSSIBLE CAUSES P N SWITCH SENSE CIRCUIT OPEN PARK NEUTRAL SWITCH SENSE CIRCUIT OPEN PARK NEUTRAL SWITCH SENSE CIRCUIT SHORT TO GROUND PARK NEUTRAL SWITCH SENSE CIRCUIT SHORT TO GROUND PARK NEUTRAL SWITCH WIRING HARNESS OBSERVABLE DEFECT PARK NEUTRAL SWITCH WIRING HARNESS OBSERVABLE DEFECT PARK NEUTRAL SWITCH DEFECTIVE TRS DEFECTIVE PCM DEF P N
295. ire System Two Trip Faults Turns On The MIL and Sets DTC After Two Consecutive Failures Priority 2 or 4 Fuel Control Monitor Monitors Fuel Control System For Fuel System Lean Fuel System Rich Requires 3 Consecutive Fuel System Good Trips To Extinguish The MIL Misfire Monitor Monitors For Engine Misfire at 1000 RPM Counter Type B 200 RPM Counter Type A Requires 3 Consecutive Misfire Good Trips To Extinguish the MIL Type A misfire is a one trip failure The MIL will illuminate and blink at the first failure GENERAL INFORMATION 3 2 3 OTHER CONTROLS CHARGING SYSTEM The charging system is turned on when the engine is started and ASD relay energized When theASD relay is on ASD output voltage is supplied totheASD sense circuit at the PCM This voltage 15 connected in some cases through the PCM and supplied to one of the generator field terminals Gen Source All others the Gen field 15 nected directly to the ASD output voltage The amount of current produced by the generator is controlled by the Electronic Voltage Regulator EVR circuitry in the PCM battery temperature sensor located either in the battery tray using the ambient sensor or in the PCM itself is used to sense battery temperature This temperature along with sensed line voltage is used by the PCM to vary the battery charging rate This is done by cycling the ground path to the other generator field termi nal Gen
296. is indicated the PCM senses excessive engine rpm for a given vehicle speed If SOL FLT Denied message is indicated the Powertrain Control Module senses a Servo Solenoid Circuit trouble code that is maturing or set in memory Test Complete 263 SPEED CONTROL Symptom SPEED CONTROL ON OFF SWITCH POSSIBLE CAUSES CLOCKSPRING DEFECTIVE PCM DEFECTIVE SPEED CONTROL ON OFF SET SWITCH SPEED CONTROL GROUND CIRCUIT TO SWITCH OPEN SPEED CONTROL ON OFF SWITCH DEFECTIVE SPEED CONTROL ON OFF SWITCH SIGNAL CIRCUIT OPEN SPEED CONTROL ON OFF SWITCH SIGNAL CIRCUIT SHORT TO GROUND SPEED CONTROL ON OFF SWITCH TERMINAL DAMAGED ACTION APPLICABILITY Ignition on engine not running All With the DRBIII monitor the Speed Control Switch inputs While observing the display press the Speed Control ON switch Does the show S C on off Yes gt Test Complete Perform Powertrain Verification Test VER 4A No gt GoTo 2 Ignition Off Disconnect the Speed Control On Off and Set Switch Note Check connectors Clean repair as necessary Is any terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 4A No gt GoTo 3 Ignition Off Disconnect the Speed Control On Off and Set Switch Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the S C Ground Circuit at the S C ON OFF SET Switch Connector Is the
297. issing Yes gt GoTo 8 No gt GoTo 11 Ignition Off Disconnect the CKP Sensor Connector Note Check connectors Clean repair as necessary Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout miswiring Perform Powertrain Verification Test VER 5A No GoTo 9 Ignition Off Disconnect the PCM Note Check connectors Clean repair as necessary Inspect all Terminals Is any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout miswiring Perform Powertrain Verification Test VER 5A GoTo 10 Ignition Off Remove the Crankshaft Position CKP Sensor Inspect the Slots in the Flywheel for debris or damage Is the Flywheel damaged Yes Repair or replace as necessary Perform Powertrain Verification Test VER 5A No Replace the Crankshaft Position Sensor Perform Powertrain Verification Test VER 5A Start Engine At PCM backprobe CKP Sensor Signal Circuit with Oscilloscope s voltage measure ment lead While observing the Oscilloscope pattern wiggle CKP Sensor Circuit from Sensor to PCM Were any CKP Sensor Signals missing when the wiggle test was conducted Yes Note where wiggling the wires caused a missing CKP Sensor signal Repair Camshaft and Crankshaft Wire Harness as neces sary Perform Powertrain Verification Test VER 5A No Test Complete 193 APPLICABILITY
298. itch on the engine running and the A C relay energized Set Condition A C pressure sensor signal voltage at PCM cavity 42 goes below 0 5 volt or the voltage is below 059 volt POSSIBLE CAUSES A C PRESSURE SENSOR 5 VOLT SUPPLY CKT OPEN A C PRESS SEN CONN AND WIRING HARN OBSERVABLE DEF A C PRESSURE SEN SIG CKT SHORTED TO SEN GND CKT A C PRESSURE SENSOR CONN AND WIRING HARN INTER DEF A C PRESSURE SENSOR SIGNAL CKT SHORTED TO GND A C PRESSURE SENSOR DEFECTIVE PCM DEF A C PRESSURE SEN ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read the A C Pressure Sensor voltage Is the A C Pressure Sensor voltage below 0 2 volt Yes gt GoTo 2 No gt GoTo 7 Ignition Off Disconnect the A C Pressure Sensor Connector Note Check connectors Clean repair as necessary Ignition on with engine not running Using a Voltmeter measure the 5 Volt Supply Circuit 15 the A C Pressure Sensor 5 volt Supply Circuit above 4 9 volts Yes gt GoTo 3 No Repair the open 5 Volt Supply Circuit Perform Powertrain Verification Test VER 2A 217 DRIVEABILITY P 1599 A C PRESSURE SENSOR VOLTS TOO LOW Continued APPLICABILITY Ignition Off Disconnect the A C Pressure Sensor Connector Note Check connectors Clean repair as necessary Ignition on with engine not running With the DRB read the A C Pressure Sensor voltage Is the A C Pressure Sensor voltage above 4 5 volts Yes
299. ith the DRB monitor the CMP state while tapping the other end of the jumper to Sensor Ground Does the current CMP state change Yes gt GoTo 6 gt GoTo 7 Ignition Off ENGINE 2 0L Remove the Camshaft Position Sensor and 2 4L Note Check connectors Clean repair as necessary Remove and inspect the CMP Sensor Target Magnet for damage or misalignment 15 the Camshaft Target Magnet okay Yes Replace the Camshaft Position Sensor Perform Powertrain Verification Test VER 5A Repair or replace the Camshaft Target Magnet as necessary Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CMP Sensor Signal Circuit from the CMP Sensor Connector to the PCM Connector Is the resistance below 5 0 ohms Yes gt GoTo 8 No Repair the open CMP Sensor Signal Circuit Perform Powertrain Verification Test VER 5A 114 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued ACTION APPLICABILITY Ignition Off ENGINE 2 0L Disconnect the Camshaft Position Sensor Connector and 2 4L Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as
300. ition P 0403 EGR SOLENOID CIRCUIT When Monitored With the ignition key on and engine running and battery voltage gt 10 volts Set Condition The EGR solenoid control circuit is not in the expected state when requested to operate by the PCM POSSIBLE CAUSES EGR SOLENOID DEFECTIVE FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN EGR SOLENOID CIRCUIT WIRING HARNESS INTER DEFECT EGR SOLENOID CIRCUIT WIRING HARNESS OBSERVABLE DEF EGR SOLENOID CONTROL CIRCUIT OPEN EGR SOLENOID CONTROL CIRCUIT SHORT TO GROUND PCM DEFECTIVE EGR SOL CKT ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read the codes Is the Global Good Trip displayed and equal to 0 Yes gt GoTo 2 No gt GoTo 7 Ignition Off Disconnect the EGR Solenoid Connector Note Check connectors Clean repair as necessary Turn ignition on with engine not running Using the DRB actuate the EGR Solenoid Using a Voltmeter probe the Fused Ignition Switch Output Circuit at the EGR Solenoid Connector Is the voltage above 10 0 volts Yes gt GoTo 3 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 2A 133 DRIVEABILITY P 0403 EGR SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off Disconnect the EGR Solenoid Connector Note Check connectors Clean repair as necessary Using an ohmmeter measure the EGR Solenoid Is the resistance between 25 0 and 50 0 ohms
301. itle for the tests will be MULTIPLE CYLINDER MIS FIRE E When Monitored and Set Condition P 0300 MULTIPLE CYLINDER MIS FIRE When Monitored With the engine running after successfully performing Crank Sensor learn Set Condition When more than a 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip P 0301 CYLINDER 1 MIS FIRE When Monitored With the engine running after successfully performing Crank Sensor learn Set Condition When more than a 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip P 0302 CYLINDER 2 MIS FIRE When Monitored With the engine running after successfully performing Crank Sensor learn Set Condition When more than a 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip P 0303 CYLINDER 3 MIS FIRE When Monitored With the engine running after successfully performing Crank Sensor learn Set Condition When more than a 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip P 0304 CYLINDER 4 MIS FIRE When Monitored With the engine running after successfully performing Crank Sensor learn Set Condition When more than a 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip 100 DRIVEABILITY P 0300 MULTIPLE CYLINDER MIS FIRE Continued POSSIBLE CAUSES OTHE
302. jector 5 Connector 3 3L V6 and or EN Note Check connectors Clean repair as necessary GINE 3 8L V6 Using an Ohmmeter measure resistance of Injector 5 and or ENGINE 15 the resistance between 10 0 and 16 0 ohms 3 3L 6 FFV Yes gt GoTo 3 No Replace the Fuel Injector Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L Disconnect Injector 5 Connector 3 3L V6 and or EN Note Check connectors Clean repair as necessary GINE 3 8L V6 Turn the ignition on and or ENGINE With the DRB actuate the Auto Shutdown Relay 3 3L V6 FFV Using a Voltmeter measure the ASD Relay Output voltage Does the voltage cycle high and low Yes gt GoTo 4 No Repair the open ASD Relay Output Circuit Perform Powertrain Verification Test VER 5A 95 DRIVEABILITY 0205 ECTOR 5 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L Disconnect Injector Connector 3 3L V6 and or EN Note Check connectors Clean repair as necessary GINE 3 8L V6 Disconnect the Powertrain Control Module Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 FFV Using an Ohmmeter measure the Injector 5 Driver Circuit from the PCM to the Injector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Injector 5 Driver Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L Disconnect Injector 5 C
303. ke Switch Perform Powertrain Verification Test VER 4A If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 4A If there are no potential causes remaining the Brake Switch is assumed to be All defective 270 SPEED CONTROL CHECKING SPEED CONTROL OPERATION Continued APPLICABILITY Ignition On All With the Select Inputs Outputs monitor the S C Switch Press and hold each switch to see change in the parameter Does the parameter change for each switch Yes gt GoTo 26 No Replace the S C Switch Perform Powertrain Verification Test VER 4A Ignition On Engine Not Running With the DRB monitor the Speed Control Switch inputs While observing display press the Set Switch several times Does the DRB show the Set Switch pressed and released Yes gt GoTo 27 No Replace the Speed Control On Off Set Switch Perform Powertrain Verification Test VER 4A If there are no potential causes remaining the Clock Spring is assumed to be defective View repair options Repair Replace Clock Spring Perform Powertrain Verification Test VER 4A 271 STARTING Symptom RESPONSE CONDITION POSSIBLE CAUSES IGNITION NOT ON DIAGNOSTIC READ OUT BOX ADAPTER CABLE DEFECTIVE FUEL PUMP DEFECTIVE FUSED IGNITION SWITCH OUTPUT CIRCUIT OP
304. ke Switch Ground CKT With the DRB read the Brake Switch input status Does the show Brake SW Released Yes Replace the Brake Switch Perform Powertrain Verification Test VER 4A No Repair the open Brake Switch Ground Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the PCM Note Check connectors Clean repair as necessary Is any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 4A gt GoTo 4 261 SPEED CONTROL SPEED CONTROL BRAKE SWITCH OUTPUT Continued ACTION APPLICABILITY Ignition Off All Disconnect the Brake Switch Connector Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Brake Switch Sense Circuit from Brake Switch to PCM 15 the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Brake Switch Sense Circuit Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Brake Switch Connector Disconnect the PCM Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance of Brake Switch Sense Circuit from the Brake Switch Connector to ground Is the resistance below 5 0 ohms Yes Repair the Brake Switch Sense Circuit shorted to ground Perform Powertrain Verification Test VER 4A No gt GoTo 6 If there no potential causes remaining the
305. l Pump Relay Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Fuel Pump Relay Control Circuit for resistance Is the resistance below 5 0 ohms Yes gt GoTo 7 No Repair the open Fuel Pump Relay Control Circuit Perform Powertrain Verification Test VER 2A Ignition Off Disconnect the PCM Connector Note Check connectors Clean repair as necessary Disconnect the Fuel Pump Relay Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Fuel Pump Relay Control Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Fuel Pump Relay Control Circuit for a short to ground Perform Powertrain Verification Test VER 2A No GoTo 8 Ignition off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A 179 DRIVEABILITY Symptom P 1294 TARGET IDLE NOT REACHED When Monitored and Set Condition P 1294 TARGET IDLE NOT REACHED When Monitored Engineidling more than 2 8 seconds and coolant temp greater than 70 degrees 160 degrees F For an automatic transmission in drive mode There must not be a MAP Sensor or TP Sensor or speed sensor trouble code Set Condition Engine idle is gt 200 RPM above target idle speed or less than 100 RPM below target idle speed for 20 seconds Two consecutive failures in a row will store
306. le Codes Does display show No CCD Message from and the start run counter equal to zero Yes gt GoTo 3 No gt GoTo 7 224 DRIVEABILITY P 1698 NO CCD MESSAGES FROM TCM Continued ACTION APPLICABILITY Ignition Off Disconnect the PCM Connectors Disconnect the TCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the CCD Bus Circuit between the PCM and TCM Connectors Is the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open CCD Bus Circuit between and Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the PCM Connectors Disconnect the TCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the CCD Bus Circuit between the PCM and TCM Connectors 15 the resistance below 5 0 ohms Yes gt GoTo 5 No the open CCD Bus Circuit between the PCM and Perform Powertrain Verification Test VER 2A Key On Using the under Transmission select 41TE Does the DRB display show Response Yes Replace the Transmission Control Module Perform Powertrain Verification Test VER 2A No gt GoTo 6 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A Ignition Off Using the sche
307. le Connector Note Check connectors Clean repair as necessary Disconnect the I gnition Coil Connector Note Check connectors Clean repair as necessary Using Ohmmeter test the Ignition Coil 2 Driver Circuit for resistance 15 the resistance below 5 0 ohms Yes gt GoTo 7 No Repair the open Ignition Coil 2 Driver Circuit Perform Powertrain Verification Test VER 2A Ignition off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A 126 DRIVEABILITY P 0352 IGNITION COIL 2 PRIMARY CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Start Engine Wiggle Wiring Harness from the Ignition Coil to the PCM Does the engine miss or stall Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 2A No gt GoTo 9 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 127 DRIVEABILITY Symptom P 0353 IGNITION COIL 3 PRIMARY CIRCUIT When Monitored and Set Condition P 0353 IGNITION COIL 3 PRIMARY CIRCUIT When Monitored With battery voltage greater than 8 volts during engine cranking or greater than 12 volts with engine running and none of the coils in dw
308. ly Refer to any hotlines or technical service bulletins that apply LL DRIVEABILITY P 0443 EVAP PURGE SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off ALL Disconnect Proportional Purge Solenoid Connector Note Check connectors Clean repair as necessary Disconnect the battery Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using Ohmmeter measure the Purge Solenoid Control Circuit at Connector to ground 15 the resistance below 5 0 ohms Yes gt Repair the Proportional Purge Solenoid Control Circuit short to ground Perform Powertrain Verification Test VER 5A GoTo 14 Ignition Off Disconnect Proportional Purge Solenoid Connector Note Check connectors Clean repair as necessary Disconnect the battery Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using and Ohmmeter measure the Proportional Purge Solenoid Control Circuit PCM to Solenoid Connector Is the resistance below 5 0 ohms Yes gt GoTo 15 No Repair the open PPS Control Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect Proportional Purge Solenoid Connector Note Check connectors Clean repair as necessary Disconnect the battery Note Check connectors Clean repair
309. m Powertrain Verification Test VER 2A Ignition Off ENGINE 2 4L 1 4 Warning The Fuel System must be opened may be under high DOHC and or EN Release the Fuel Pressure GINE 3 3L V6 Connect a Fuel Pressure Gauge to test port and or ENGINE Ignition On Engine Not Running 3 3L V6 FFV and or With the DRB actuate F uel System uel Pressure should be 43 to 53 psi for Gasoline ENGINE 3 8L V6 Engines and 50 to 60 psi for Flexible Fuel Vehicle Record the Fuel Pressure reading 15 the Fuel Pressure above the specification Yes gt GoTo 6 No GoTo 8 Ignition Off Werning The Fuel System must be opened and may be under high pressure Release the fuel pressure Remove the Fuel Pressure Gauge from the Fuel Rail Remove the Fuel Return Line between the Fuel Tank and Filter Adjust a shop air hose to 40 psi Using shop air inspect the Fuel Line by attempting to blow air through it 15 the Fuel Return Line restricted Yes Replace the Fuel Return Line Perform Powertrain Verification Test VER 2A GoTo 7 If there are no potential causes remaining the Fuel Pressure Regulator is assumed to be defective View repair options Repair Replace the Fuel Pressure Regulator Perform Powertrain Verification Test VER 2A 238 DRIVEABILITY CHECKING FUEL DELIVERY Continued Ignition Off Inspect the Chassis Fuel Supply Line to engine for a kink or restriction
310. maining the Powertrain Control Module is ENGINE 2 0L assumed to be defective and 2 4L View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Attempt to start the engine if not already running ENGINE 2 0L Does the engine start and 2 4L Yes gt GoTo 13 No Return to symptom list and select symptoms for a no start condition 115 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued ACTION Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A No Test Complete Ignition On Engine Not Running Using the DRB read Trouble Codes 15 the Global Good Trip displayed and equal to 0 Yes gt GoTo 15 No gt GoTo 25 Ignition Off Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Turn ignition on Using a Voltmeter measure the 8 Volt Supply Circuit Is the voltage above 7 0 volts Yes gt GoTo 16 No Repair the open 8 Volt Supply Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the CMP Sensor Ground Circuit from the CMP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes gt GoTo 17 No Re
311. matic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A No Test Complete 225 DRIVEABILITY Symptom CHECKING 5 VOLT SUPPLY CIRCUIT POSSIBLE CAUSES 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND 5 VOLT SUPPLY WIRING HARNESS INTER DEF A C PRESSURE SENSOR DEFECTIVE MAP SENSOR DEFECTIVE THROTTLE POSITION SENSOR DEFECTIVE PCM DEF 5 VOLT SUPPLY CIRCUIT APPLICABILITY Ignition On Engine Not Running All Disconnect the Throttle Position Sensor Connector Note Check connectors Clean repair as necessary With a voltmeter probe the 5 Volt Supply Ckt at the TP Sensor harness connector Is the voltage reading below 4 5 volts Yes gt GoTo 2 No GoTo 6 Ignition On Engine Not Running Disconnect the Throttle Position Sensor Connector Disconnect the A C Pressure Sensor Note Check connectors Clean repair as necessary With a voltmeter probe the TP Sensor 5 Volt Supply Circuit to the TP Sensor 15 the 5 Volt Supply Circuit voltage above 4 0 volts Yes Replace the A C Pressure Sensor Perform Powertrain Verificaton Test VER 2A No GoTo 3 Ignition On Engine Not Running Disconnect the Throttle Position Sensor Connector Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary With the voltmeter probe the TP Sensor 5 Volt Supply Circuit to the TP Sensor
312. message transmission acknowledgement from the PCM after 3 transmit attempts POSSIBLE CAUSES INTERMITTENT WIRING HARNESS PROBLEM WIRING HARNESS INSPECTION SKIM PCM DEFECTIVE 311 SENTRY KEY IMMOBILIZER SYSTEM PCM STATUS FAILURE Continued ACTION APPLICABILITY Using the DRB erase the codes Turn ingition off Wait 10 seconds Turn ignition on Using the DRB read the codes Does the DRB display the code that was previously erased Yes gt GoTo 2 No gt GoTo 4 Turn ignition off All Note Visually inspect the related wiring harness Look for any chafed pierced pinched or partially broken wires Note Visually inspect the related wire harness connectors Look for broken bent pushed out or corroded terminals Note Refer to any Technical Service Bulletins TSB that may apply Were any problems found Yes Repair as necessary Perform the Powertrain Verification Test VER 7A No GoTo 3 Replace the Sentry Key Immobilizer Module Using the DRB erase the codes Drive vehicle Perform several key cydes Does the code appear Yes Replace the Powertrain Control Module Perform the Powertrain Verification Test VER 7A No Test Complete Turn ignition off Note Visually inspect the related wiring harness Look for any chafed pierced pinched or partially broken wires Note Visually inspect the related wire harness connectors Look for broken bent pushed out or corroded terminals
313. meter measure the Fused B Circuit at Relay Connector Is the voltage above 10 0 volts Yes gt GoTo 6 No the open Fused Circuit check Radiator Fan Fusein PDC Perform Powertrain Verification Test VER 5A Ignition Off All Disconnect the Radiator Fan Relay Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Radiator Fan Relay Ground Circuit Is the resistance below 5 0 ohms Yes gt GoTo 7 Repair the open Fan Relay Ground Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Radiator Fan Relay Connector Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Radiator Fan Relay Control Circuit to a good ground 15 the resistance below 5 0 ohms Yes Repair the Radiator Fan Relay Control Circuit for a short to ground Perform Powertrain Verification Test VER 5A GoTo 8 Ignition Off Disconnect the Radiator Fan Relay Connector Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the Radiator Fan Relay Control Circuit from the Relay to the PCM Is the resistance below 5 0 ohms Yes gt GoTo 9 No gt Repair the open Radiator Fan Relay Control Circuit Perform Powertrain Verification Test VER 5A 204 DRIVEABILITY P 1491 RADIATOR FAN CONTROL RELAY CIRCUIT Continued
314. n OF THESE CONDITIONS COULD RESULT IN A RICH OR LEAN CONDITION CAUSING AN OXYGEN SENSOR TROUBLE CODE TO BE STORED IN THE PCM OR THE VEHICLE MAY EXHIBIT ONE OR MORE THE DRIVEABILITY SYMPTOMS LISTED IN THE TABLE OF CONTENTS 3 2 6 SKIS OVERVIEW The Sentry Key Immobilizer System SKIS is immobilizer system design to prevent unauthorized vehicle operation The system consists of a Sentry Key Immobilizer Module SKIM ignition key s equipped with a transponder chip and engine con troller When the ignition switch is turned on the SKIM interrogates the ignition key If the ignition key is Valid the SKIM sends a CCD Bus message to the engine controller indicating the presence of a valid igntion key Upon receiving a Valid key signal the PCM will allow the engine to continue to operate 3 2 7 SKIM ON BOARD DIAGNOSTICS TheSKIM has been programmed to transmit and monitor many different coded messages as well as CCD Bus messages This monitoring is called On Board Diagnosis GENERAL INFORMATION Certain criteria must be met for a diagnostic trouble code to be entered into the SKIM memeory criteria may be range of Input voltage CCD Bus message or coded messages to the SKIM If all of the criteria for monitoring a circuit or function are met and a fault is sensed a diagnostic trouble code will be stored in the SKIM memory 3 2 8 SKIS OPERATION When ignition power is
315. n Using Pressure Tool 6872A set Pressure Hold to Open and set Vent to Closed Turn Pump Timer On Allow Pressure Pump to build pressure to at least 14 H20 Disconnect Leak Detection Pump Pressure Hose from LDP Did pressure drop when hose was disconnected Yes Replace the Leak Detection Pump Perform VERIFICATION TEST VER 6A No gt GoTo 5 Inspect the LDP Pressure Hose 15 the hose OK Yes Replace the Evaporative Canister Perform VERIFICATION TEST VER 6A No Replace the LDP Pressure Hose Perform VERIFICATION TEST VER 6A 201 DRIVEABILITY P 1486 EVAP LEAK MONITOR PINCHED HOSE FOUND Continued APPLICABILITY To perform this test you will need Miller Tool Kit 6872 and 6922 All Caution Refer to safety information If disconnected reconnect the Vacuum Connector at the Purge Solenoid Perform Evaporative System Pressure Pump Self Test that is specified on the tester cover Connect the Evap Pressure Pump Supply to Gas Cap Adapter and install on vehicle Start Engine With the DRB goto LDP SYSTEM TEST and follow instructions on the screen Using Pressure Tool 6872A set Pressure Hold to Open and set Vent to Closed Turn Pump Timer On Allow Pressure Pump to build pressure up to at least 14 H20 Remove hose at Evap Canister that goes to Purge Solenoid Did pressure drop when hose was disconnected Yes Repair the pinched hose from the Purge Solenoid to the
316. n Fuel Pump Relay Output Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 3 0L V6 Disconnect the Fuel Pump Relay Check connectors Clean repair as necessary Install a substitute Relay of the same part number for the Fuel Pump Relay Attempt to start the Engine Does the engine start Yes Replace the Fuel Pump Relay Perform Powertrain Verification Test VER 1A No GoTo 18 Ignition off ENGINE 3 0L V6 If there potential causes remaining the Fuel Pump is assumed to be defective View repair options Repair Replace the Fuel Pump Perform Powertrain Verification Test VER 1A Note Ensure the SKIM has proper communication and that there no ENGINE 2 0L SKIM DTC s present before continuing 2 4L 1 4 DOHC Ignition Off and or ENGINE Ensure the Throttle Cables are not holding the Throttle open 3 3L V6 FFV and or 15 the Throttle held open ENGINE 3 3L V6 and or ENGINE 3 8L V6 Yes Repair condition that holds the Throttle Body open No GoTo 20 282 STARTING CHECKING THE FUEL SYSTEM Continued ACTION APPLICABILITY Ignition On Engine Not Running ENGINE 2 0L With the DRB actuate the Fuel System and check for Fuel Pump operation at the 2 4L 1 4 DOHC Fuel Tank and or ENGINE Is the Fuel Pump operating 3 3L V6 FFV and or ENGINE 3 3L V6 and or ENGINE 3 8L V6 Yes gt GoTo 21 gt GoTo 30 Ignition Off ENGINE 2 0L Warning The F
317. n Test per service instructions ENGINE 3 0L V6 Did the Fuel Pressure Leak Down Test pass and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 7 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 105 DRIVEABILITY P 0305 CYLINDER 5 MIS FIRE Continued APPLICABILITY Perform Fuel Pump Amperage Test per service instructions ENGINE 3 0L V6 Did the Fuel Pump Amperage Test pass and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 8 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 Perform Fuel Pump Capacity Test per service instructions ENGINE 3 0L V6 Did the Fuel Pump Capacity Test pass and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 9 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 Perform Fuel Pump Pressure Test per service instructions ENGINE 3 0L V6 Did the Fuel Pump Pressure Test pass and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 10 No Relieve fuel pressure and repair as necessary Perform VERIFICATION TEST VER 5A2 With the DRB read the FREEZE FRAME DATA ENGINE 3 0L V6 Use the freeze frame data and attempt to determine the cause of the misfire and or ENGINE In the FREEZE FRAME i
318. n repair as necessary Connect a jumper between the Fuel Level Sensor Signal Circuit and the Ground Circuit at the Fuel Pump Module Connector With the DRB read the Fuel Level Sensor voltage Is the voltage below 1 0 volt Yes Replace the Fuel Level Sensor Perform Powertrain Verification Test VER 2A No gt GoTo 3 Key Off Disconnect the Fuel Pump Module Connector Note Check connectors Clean repair as necessary Measure resistance of the Ground Circuit at the Fuel Pump Module Connector Is the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the Ground Circuit as necessary Perform Powertrain Verification Test VER 2A 151 DRIVEABILITY P 0463 FUEL LEVEL SENDING UNIT VOLTS TOO HIGH Continued ACTION APPLICABILITY Key Off Disconnect the Fuel Pump Module Connector Note Check connectors Clean repair as necessary Disconnect the Body Control Module GREY Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the uel Level Sensor Signal Circuit from the BCM to the Fuel Pump Module Connector Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open Fuel Level Sensor Signal Circuit Perform Powertrain Verification Test VER 2A If there are no potential causes remaining the BCM is assumed to be defective All View repair options Repair Replace the Body Control Module Perform Powertrain Verification Test VER 2A Ignition
319. n repair as necessary With Ohmmeter measure the VSS Signal Circuit from the PCM to the TCM 15 the resistance below 5 0 ohms Yes gt GoTo 27 No Repair the open Vehicle Speed Sensor Signal Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A 158 APPLICABILITY ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 w EATX ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 w EATX ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 w EATX DRIVEABILITY Symptom P 0505 IDLE AIR CONTROL MOTOR CIRCUITS When Monitored and Set Condition P 0505 IDLE AIR CONTROL MOTOR CIRCUITS When Monitored At key on and battery voltage greater than 11 5 volts Set Condition PCM senses a short to ground or battery voltage on any of the four IAC driver circuits for 2 75 seconds while the IAC motor is active POSSIBLE CAUSES IAC 4 DRIVER CIRCUIT SHORTED TO GROUND IDLE AIR CONTROL MOTOR DEFECTIVE P
320. n this manual are based on the failure condition or symptom being present at time of diagnosis Please follow the recommendations below when choosing your diagnostic path 1 First make sure the DRBIII is communicating with the appropriate modules ie if the DRBII displays a No Response condition you must diagnose this first before proceeding 2 Read DTC s diagnostic trouble codes with the DRBIII 3 If no DTC s are present identify the customer complaint 4 Once the DTC or customer complaint is identi fied locate the matching test in the Table of Contents and begin to diagnose the symptom All component location views are in Section 8 0 All connector pinouts are in Section 9 0 All system schematics are in Section 10 0 An placed before the symptom description indi cates a customer complaint When repairs are required refer to the appropri ate service manual for the proper removal and repair procedure Diagnostic procedures change every year New diagnostic systems may be added carryover sys tems may be enhanced READ THIS MANUAL BEFORE TRYING TO DIAGNOSE A VEHICLE CODE It is recommended that you review the entire manual to become familiar with all new and changed diagnostic procedures After using this book if you have any comments or recommendations please fill out the form at the back of the book and mail it back to us 1 1 SYSTEM COVERAGE This diagnostic procedures manual covers
321. nd allow it to reach operating temperature With the DRB enter System Test and perform the Minimum Air Flow Test Is the idle RPM within the range shown in the chart Yes gt Test Complete No Replace Throttle Body Perform Verification Test VER 2A 246 DRIVEABILITY Symptom CHECKING OXYGEN SENSOR HEATER POSSIBLE CAUSES 1 2 2 SENSOR VOLTAGE BTWN 0 4 amp 0 6 V 1 1 2 SENSOR DEFECTIVE 1 2 2 SENSOR DEFECTIVE ASD RELAY OUTPUT CIRCUIT OPEN 1 1 02 SEN ASD RELAY OUTPUT CIRCUIT OPEN 1 2 02 SEN HEATER GROUND CIRCUIT OPEN 1 1 2 SEN HEATER GROUND CIRCUIT OPEN 1 2 2 SEN APPLICABILITY Ignition On Engine Not Running All With the DRB actuate the ASD O2 Sensor Heater test Wait two minutes for O2 Sensor voltage to stabilize Read the Upstream O2 Sensor voltage Is the voltage of the Upstream O2 Sensor between 0 4 and 0 6 volts Yes gt GoTo 2 No GoTo 5 Note The O2 Sensor voltage staying between 0 4 V and 0 6 V indicates a problem with that Sensor Circuit Ignition Off Disconnect the Upstream O2 Sensor Connector Note Check connectors Clean repair as necessary Turn on With the DRB actuate the O2 Sensor Heater test Using a Voltmeter measure the ASD Relay Output Circuit at Sensor Connector Is the voltage above 10 0 volts Yes gt GoTo 3 No Repair the open ASD Relay Output Circuit from O2 sensor connector back to splice Perform Powertrain Verifica
322. nectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary With an ohmmeter measure the resistance between the ECT Sensor Signal Circuit and the ECT Sensor Ground Circuit Is the resistance below 5 0 ohms Yes Repair the ECT Sensor Signal Circuit shorted to the ECT Sensor Ground Circuit Perform Powertrain Verification Test VER 5A GoTo 4 Ignition Off All Disconnect the Engine Coolant Temperature ECT Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the ECT Sensor Signal Circuit to ground Is the resistance below 5 0 ohms Yes Repair the ECT Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 5 Ignition Off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running Using the schematic wiggle the ECT Sensor Connector and Harness Monitor the DRB display Was there any ECT Sensor voltage change Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A gt GoTo 7 Ignition Off Using the schematic as a gui
323. ng the DRB program the new ignition key to the SKIM Module Using the DRB erase the codes Turn ignition off Wait 10 seconds Turn ignition on Using the DRB read the codes 314 SENTRY KEY IMMOBILIZER SYSTEM Symptom List VIN MISMATCH When Monitored and Set Condition VIN MISMATCH When Monitored Monitored continuously during the engine RUN cycle Set Condition This condition exists when the VIN received fromthe PCM does not match the VIN stored in the SKIM S EEPROM Note Failure maturity time may take up to 3 minutes POSSIBLE CAUSES INTERMITTENT WIRING HARNESS PROBLEM SKIM DEFECTIVE PCM DEFECTIVE ACTION APPLICABILITY Using the DRB erase the codes All Turn ingition off Wait 10 seconds Turn ignition on Using the DRB read the codes Does the DRB display the code that was previously erased Yes gt GoTo 2 gt GoTo 3 Note Ensure that a VIN has been programmed into the PCM If a VIN is not displayed attempt to program the PCM with the vehicle VIN before continuing Turn ignition on Using the DRB select Engine system from the main menu Display and record the Vehicle Identification Number VIN Does the VIN recorded from the PCM match the VIN of the vehicle Yes Replace the Sentry Key Immobilizer Module Perform the Powertrain Verification Test VER 7A No Replace the Powertrain Control Module PCM Program the correct VIN into the new PCM and retest Perform the
324. nition Off Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Ignition on engine not running Using an Ohmmeter measure the resistance between the Downstream O2 Sensor Ground Circuit and a good engine ground Is the resistance above 5 0 ohms Yes Repair the open Downstream O2 sensor Ground Circuit Perform Powertrain Verification Test VER 5A gt GoTo 5 Ignition Off All Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Connect jumper wire between the Downstream O2 Sensor Signal Circuit and Ignition on engine not running Using the DRB in sensors read the Downstream Oxygen Sensor voltage 15 the voltage above 1 0 volt Yes Replace the Downstream O2 Sensor Perform Powertrain Verification Test VER 5A No GoTo 6 Ignition Off Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an ohmmeter measure the resistance of the Downstream O2 Sensor Signal Circuit from the O2 Sensor Connector to the PCM Connector Is the resistance below 5 0 ohms Yes gt GoTo 7 Repair the open Downstream O2 Sensor Signal Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the PCM is assumed to be defective View repair options Re
325. nitoring the DRB open the Throttle Plate to wide open throttle 15 the Throttle Position Sensor voltage above 3 5 volts Yes gt GoTo 9 No Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running While monitoring the DRB slowly open and close the Throttle Plate Note You must move linkage very slowly while looking for a jump in voltage 15 the voltage change smooth Yes gt GoTo 10 No Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A 43 DRIVEABILITY P 0121 TPS VOLTAGE DOES NOT AGREE WITH MAP Continued APPLICABILITY Ignition Off All Disconnect the Throttle Position Sensor Note Check connectors Clean repair as necessary Ignition on engine not running Using a Voltmeter probe the 5 Volt Supply Circuit at the TP Sensor Is the voltage below 5 0 volts Yes Repair open 5 volt Supply Circuit to Throttle Position sensor Perform Powertrain Verification Test VER 5A No gt GoTo 11 Ignition Off Check Throttle Plate and Linkage for a binding condition Ensure the Throttle Linkage is at the Idle Position Note TPS Ground Circuit and the 5 Volt Supply Circuit switched will cause this code to appear Disconnect the TP Sensor Inspect the TPS Wire colors for the correct cavities Note Check connectors Clean repair as necessary 15 any terminal damaged pushed out miswired or
326. nning after successfully performing Crank Sensor learn Set Condition When more than 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip P 0306 CYLINDER 6 MIS FIRE When Monitored With the engine running after successfully performing Crank Sensor learn Set Condition When more than a 2 misfire rate is measured during two trips or with a 10 to 30 misfire rate during one trip POSSIBLE CAUSES OTHER POSSIBLE CAUSES FOR MIS FIRE CAM CRANK VALVE TIMING OR VACUUM PROBLEM ELECTRONIC IGNITION COIL OUTPUT LOW ENGINE MECHANICAL PROBLEM SECONDARY IGNITION PATTERN IRREGULAR FUEL CONTAMINATION FUEL PRESSURE LEAK DOWN OUT OF SPECIFICATION FUEL PUMP AMPERAGE OUT OF SPECIFICATION FUEL PUMP CAPACITY OUT OF SPECIFICATION FUEL PUMP PRESSURE OUT OF SPECIFICATION MIS FIRE DOES NOT REOCCUR APPLICABILITY With the DRB read the DTCs ENGINE 3 0L V6 Is the MIS FIRE GOOD TRIP counter displayed and equal to zero and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 2 No GoTo 3 104 DRIVEABILITY P 0305 CYLINDER 5 5 Continued ACTION APPLICABILITY At this time the conditions that set this fault are present ENGINE 3 0L V6 With the DRB read the FREEZE FRAME DATA and SIMILAR CONDITIONS and or ENGINE WINDOWS 3 3L V6 and or EN Attempt to operate the vehicle in the similar conditions GINE 3 8L V6 W
327. ns mechanical problems All ENGINE VACUUM must beat least 13 inches in neutral ENGINE VALVE TIMING must be within specifications ENGINE COMPRESSION must be within specifications ENGINE EXHAUST SYSTEM must be free of any restrictions or leaks ENGINE PVC SYSTEM must flow freely TORQUE CONVERTER STALL SPEED must be within specifications POWER BRAKE BOOSTER no internal vacuum leaks FUEL must be free of contamination FUEL INJ ECTOR plugged or restricted injector control wire not connected to correct injector Are there any engine mechanical problems Yes Repair as necessary Perform FUEL SYSTEM MISFIRE MONITOR VERIFICATION Test Complete 82 DRIVEABILITY Symptomi start here 0201 ECTOR 1 CONTROL CIRCUIT a When Monitored and Set Condition 0201 ECTOR 1 CONTROL CIRCUIT When Monitored With battery voltage greater than 12 volts the auto shutdown relay energized injector pulse width less than 10ms and engine speed less than 3000 rpm Set Condition This trouble code takes 64 to 10 0 seconds to set when no inductive kick is sensed 18ms after injector turn off and with no other injectors on POSSIBLE CAUSES ASD RELAY OUTPUT CIRCUIT OPEN INJ ECTOR DEFECTIVE INJ ECTOR 1 DRIVER CIRCUIT OPEN INJ ECTOR 1 DRIVER CIRCUIT SHORTED TO GROUND POWERTRAIN CONTROL MODULE DEFECTIVE INJ ECTOR 1 DRIVER CIRCUIT SHORT TO GROUND ECTOR 1 DRIVER CIRCUIT SHORT TO GROUND PCM A
328. nsor Ground Circuit and a good engine ground Is the resistance above 5 0 ohms Yes Repair the open Upstream O2 sensor Ground Circuit Perform Powertrain Verification Test VER 5A No gt GoTo 5 Ignition Off All Disconnect the Upstream O2 Sensor Connector Note Check connectors Clean repair as necessary Connect a jumper wire between the Upstream O2 Sensor Signal Circuit and Ignition on engine not running Using the DRB in sensors read the Upstream Oxygen Sensor voltage 15 the voltage above 1 0 volt Yes Replace the Upstream O2 Sensor Perform Powertrain Verification Test VER 5A No GoTo 6 Ignition Off Disconnect the Upstream O2 Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using an ohmmeter measure the resistance of the Upstream O2 Sensor Signal Circuit from the O2 Sensor Connector to the PCM Connector Is the resistance below 5 0 ohms Yes gt GoTo 7 No Repair the open Upstream O2 Sensor Signal Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 61 DRIVEABILITY Symptom P 0135 O2S HEATER FAILURE eta When Monitored and Set Condition P 0135 O2S HEATER FAILURE When Monitored With the ignition key
329. nstream O2 Sensor Perform Powertrain Verification Test VER 5A 64 DRIVEABILITY 0137 1 2 O2 SENSOR VOLTAGE SHORTED TO GROUND Continued ACTION APPLICABILITY Ignition Off All Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connectors Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the Downstream O2 Sensor Signal Circuit and a good ground Is the resistance below 5 0 ohms Yes Repair the Downstream O2S Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A No gt GoTo 4 Ignition Off Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connectors Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the Downstream O2 Sensor Signal Circuit and the Sensor Ground Circuit Is the resistance below 5 0 ohms Yes Repair the Downstream O2 Sensor Signal Circuit for a short to the Sensor Ground Circuit Perform Powertrain Verification Test VER 5A GoTo 5 If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace PCM Perform Powertrain Verification Test VER 5A 65 DRIVEABILITY Symptom P 0138 1 2 O2 SENSOR SHORTED TO VOLTAGE EE When Monitored and Set Condition
330. nt Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A No Test Complete 168 DRIVEABILITY Symptom P 0601 INTERNAL CONTROLLER FAILURE ee When Monitored and Set Condition P 0601 INTERNAL CONTROLLER FAILURE When Monitored With the ignition key on Set Condition Internal checksum for software failed does not match calculated value POSSIBLE CAUSES INTERNAL CONTROLLER FAILURE ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB read Trouble Codes Is Trouble Code INTERNAL CONTROLLER FAILURE present Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A No Test Complete 169 DRIVEABILITY Symptom P 0645 A C CLUTCH RELAY CIRCUIT E When Monitored and Set Condition P 0645 A C CLUTCH RELAY CIRCUIT When Monitored With the ignition key on and battery voltage greater than 10 volts Set Condition An open or shorted condition is detected in the A C dutch relay control circuit POSSIBLE CAUSES FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN AIR CONDITIONING CLUTCH RELAY DEFECTIVE A C CLUTCH RELAY CIRCUIT WITHOUT INTER DEFECT A C CLUTCH RELAY CIRCUIT WITHOUT OBSER DEFECT A C CLUTCH RELAY CONTROL CIRCUIT SHORT TO GROUND AIR CONDITIONING CLUTCH RELAY CONTROL CIRCUIT OPEN PCM DEF A C CLUTCH RELAY ACTION APPLICABILITY Ignition On Engine Not Running All Actuate the Air Conditioning Clutch Relay
331. o 30 No Repair the open CMP Sensor Ground Circuit to the Harness splice Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 31 Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Connect one end of a jumper wire to the CMP Sensor Signal Circuit Ignition On Engine Not Running With the DRB monitor the CMP state while tapping the other end of the jumper to Sensor Ground Does the current CMP state change Yes gt GoTo 32 No gt GoTo 33 119 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Remove the Distributor Cap and Rotor Inspect the Pulse Ring for damage or misalignment Is the Pulse Ring okay Yes Replace the Camshaft Position Sensor No Repair or replace the Distributor Pulse Ring as necessary Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L V6 Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter m
332. o 8 No Repair the open 5 Volt Supply Circuit between MAP Sensor PCM Connectors Perform Powertrain Verification Test VER 2A Ignition Off All Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Ignition on with engine not running With the DRB read the MAP Sensor voltage Is the voltage above 2 2 volts Yes Repair the MAP Sensor Signal Circuit for a partial short to ground Perform Powertrain Verification Test VER 2A GoTo 6 28 DRIVEABILITY P 0106 BAROMETRIC PRESSURE OUT OF RANGE Continued APPLICABILITY Ignition Off Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary With an Ohmmeter measure the 5 Volt Supply Circuit to ground 15 the resistance below 5 0 ohms Yes Repair the 5 Volt Supply Circuit for a short to ground Perform Powertrain Verification Test VER 2A gt GoTo 9 Ignition Off All Disconnect the MAP Sensor Electrical Connector Note Check connectors Clean repair as necessary Ignition on with engine not running With the DRB read the MAP Sensor voltage Is the voltage above 2 2 volts Yes gt Repair the MAP Sensor Signal Circuit for a partial short to ground Perform Powertrain Verification Test VER 2A GoTo 10 If there are no potential causes remainin
333. onnect the Purge Vacuum Hose at the Solenoid that goes to the Canister Note In the next steps do not use more that five PSI Attempt to blow air through the Vacuum Line that goes to the canister Does the Canister and Vacuum Line allow air to pass Yes Purge Solenoid and hoses OK Test passed No GoTo 7 Ignition Off All Start the engine and allow it to reach normal operating temperature 76 deg C 170 deg F Turn ignition off Disconnect the Purge Vacuum Hose at the Solenoid that goes to the Canister Start the engine Note After 90 seconds the Purge Solenoid will allow vacuum to cycle intermittently at a steady rate Is the Evap Solenoid allowing vacuum to cycle through intermittently at a steady rate Yes gt GoTo 8 No Replace the Purge Solenoid Perform Powertrain Verification Test VER 6A Ignition Off Note In the next steps do not use more than five psi Disconnect the Purge Vacuum Hose at the Solenoid that goes to the Canister Disconnect the Vacuum Line at the Canister that goes to the EVAP Solenoid Attempt to blow air through the Vacuum Line that goes to the Canister Does the Vacuum Line allow air to pass Yes gt GoTo 9 No Repair or replace the Vacuum Line Perform Powertrain Verification Test VER 2A If there potential causes remaining the Evaporative Canister is assumed to be defective View repair options Repair Replace the Evaporative Canister Perform Powertrain Verif
334. onnector Note Check connectors Clean repair as necessary Disconnect the PCM Connectors Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the Upstream O2 Sensor Signal Circuit and a good ground Is the resistance below 5 0 ohms Yes Repair the Upstream 025 Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A gt GoTo 4 Ignition Off Disconnect the Upstream O2 Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connectors Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the Upstream O2 Sensor Signal Circuit and the Sensor Ground Circuit Is the resistance below 5 0 ohms Yes Repair the Upstream O2 Sensor Signal Circuit for a short to the Sensor Ground Circuit Perform Powertrain Verification Test VER 5A No gt GoTo 5 If there no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace PCM Perform Powertrain Verification Test VER 5A 54 DRIVEABILITY Symptom 0132 1 1 02 SENSOR SHORTED TO VOLTAGE When Monitored and Set Condition 0132 1 1 02 SENSOR SHORTED TO VOLTAGE When Monitored With the engine running for more than 2 minutes and coolant temperature above 76 degrees 170 degrees Set Condition The Upstream Oxygen Sensor Signal voltage is
335. onnector Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance from the S C Brake Switch Output Circuit to ground Is the resistance below 5 0 ohms Yes gt GoTo 16 No GoTo 19 Ignition Off Disconnect the Speed Control Servo Connector Note Check connectors Clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Powertrain Verification Test VER 4A gt GoTo 17 Ignition Off All Disconnect the Speed Control Servo Connector Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance from the S C Brake Switch Output Circuit to ground Is the resistance below 5 0 ohms Yes Repair the S C Brake Switch Output Circuit from Brake Sw to Servo for a short to ground Perform Powertrain Verification Test VER 4A GoTo 18 Ignition Off Disconnect the Speed Control Servo Connector Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure resistance from the S C Brake Switch Output Circuit to ground Is the resistance below 5 0 ohms Yes Test Complete Repair the S C Power Supply Circuit from PCM to Brake Sw for a short to ground Perform Powertrain Verification Test VER 4A Ignition Off Disconnect the Speed Control Servo Connector Note Check connectors Clean repair as n
336. onnector 3 3L V6 and or EN Note Check connectors Clean repair as necessary GINE 3 8L V6 Disconnect the Powertrain Control Module Connector and or ENGINE Note Check connectors Clean repair as necessary 3 3L V6 FFV Using Ohmmeter measure the Injector 5 Driver Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Injector 5 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 5A gt GoTo 6 If there are no potential causes remaining the PCM is assumed to be defective ENGINE 3 0L View repair options 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Repair Replace the PCM Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 0L Using the schematic as a guide inspect the Wiring and Connectors 3 3L V6 and or EN Were any problems found GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes Repair as necessary Perform Powertrain Verification Test VER 5A No GoTo 8 Engine Running ENGINE 3 0L Wiggle Wiring Harness from the Injector to the PCM 3 3L V6 and or EN Does the engine miss or stall GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Repair as necessary where wiggling caused the problem to appear Perform Powertrain Verification Test VER 5A Test Complete 96 DRIVEABILITY Symptom P 0206 INJ ECTOR 6 CONTROL CIRCUIT When Monitored and Set Condition P 0206 INJ ECTOR 6 CONTROL CIRCUIT When Monitor
337. or Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the Injector 8 Driver Circuit to ground Is the resistance below 5 0 ohms Yes Repair the Injector 8 Driver Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 6 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 5A Engine Running Wiggle Wiring Harness from the Injector to the PCM Does the engine miss or stall Yes Repair as necessary where wiggling caused the problem to appear Perform Powertrain Verification Test VER 5A GoTo 8 90 DRIVEABILITY P 0203 INJ ECTOR 3 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A Test Complete 91 DRIVEABILITY Symptom 0204 ECTOR 4 CONTROL CIRCUIT When Monitored and Set Condition P 0204 INJ ECTOR 4 CONTROL CIRCUIT When Monitored With battery voltage greater than 12 volts the auto shutdown relay energized injector pulse width
338. ory Perform Powertrain Verification Test VER 2A No GoTo 7 Ignition off If there are no potential causes remaining the SRI Memory is assumed to bein need of updating View repair options Repair Update the mileage and retest the SRI Memory Perform Powertrain Verification Test VER 2A 223 DRIVEABILITY Symptom P 1698 NO CCD MESSAGES FROM TCM er When Monitored and Set Condition P 1698 NO CCD MESSAGES FROM TCM When Monitored With the engine running Set Condition No CCD messages are received from the TCM for 10 seconds POSSIBLE CAUSES DRB DOES NOT SHOW BUS OPERATIONAL CCD WIRING HARNESS OBSERVABLE DEFECT CCD BUS CIRCUIT OPEN BETWEEN PCM AND TCM CCD BUS CIRCUIT OPEN BETWEEN PCM AND TCM PCM DEFECTIVE NO CCD MESSAGE TCM DEFECTIVE NO CCD MESSAGE APPLICABILITY Ignition On All With the select Note The CCD Bus test is automatic Does the DRB show Bus Operational Yes gt GoTo 2 No Gotothe appropriate symptom group for body diagnostics Ignition Off With the select E ngine module With the DRB erase trouble codes Raise all four wheels off the ground and properly support the vehicle Caution Keep clear of rotating wheels in the next step Start the engine Place the Shift Lever in Drive and allow the wheels to rotate for 1 minute Step on the brakes put the Shift Lever back in Park With the DRB read Troub
339. ote Carefully inspect all Vacuum Hoses for proper routing and for pinched or plugged Hoses from the engine to the PPS to the Gas Tank Are all the Vacuum Hoses OK Yes gt GoTo 2 No Repair the Vacuum Hoses as necessary Perform Powertrain Verification Test VER 2A Ignition Off Inspect the line from the PPS to the Canister Is the line disconnected ripped or cut Yes Repair the Line and replace the Purge Solenoid Perform Powertrain Verification Test VER 2A gt GoTo 4 Ignition Off Remove the Purge Solenoid and tap the ports against a clean solid surface Did any foreign material fall out Yes gt GoTo 5 Replace the Evap Purge Solenoid Perform Powertrain Verification Test VER 6A Ignition Off All Start the engine and allow it to reach normal operating temperature 76 deg C 170 deg F Turn ignition off Disconnect the Purge Vacuum Hose at the Solenoid that goes to the Canister Start the engine Note There should be no flow through the Solenoid from 1 to 2 minutes Is the PPS allowing vacuum through the Solenoid within 1 minute Yes gt GoTo 3 No GoTo 6 232 DRIVEABILITY CHECKING EVAPORATIVE EMISSION SYSTEM Continued ACTION APPLICABILITY If there are no potential causes remaining the Vacuum Line is assumed to be defective View repair options Repair Clean out the Line and replace the PPS and Canister Perform Powertrain Verification Test VER 2A Ignition Off Disc
340. owertrain Verification Test VER 2A 134 DRIVEABILITY P 0403 EGR SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 2A Test Complete 135 DRIVEABILITY Symptom P 0420 1 1 CATALYTIC CONVERTER EFFICIENCY E When Monitored and Set Condition P 0420 1 1 CATALYTIC CONVERTER EFFICIENCY When Monitored After engine warm up to 63 degrees 147 degrees 180 seconds of open throttle operation at a speed greater than 30 Km h 20 mph with the engine at 1200 1700 rpm and MAP vacuum between 15 0 and 21 0 inches of mercury Set Condition As catalyst efficiency deteriorates the switch rate of the downstream O2 sensor approaches that of the upstream O2 sensor If at any point during the test the switch ratio reaches a predetermined value a counter is incremented by one POSSIBLE CAUSES EXHAUST LEAK ENGINE MECHANICAL PROBLEM CATALYTIC CONVERTER DEFECTIVE UPSTREAM 02 SENSOR OLDER THAN DOWNSTREAM 02 SENSOR CATALYST EFFICIENCY FAILURE DOES NOT REOCCUR APPLICABILITY With the DRB read the DTCs All 15 the GLOBAL GOOD TRIPS counter displayed and equal to zero Yes gt GoTo 3 No GoTo 2 At this time the Catalyst Efficiency Failure does not exist or is an intermittent problem With the DRB read the FREEZ
341. pair Replace the PCM Perform Powertrain Verification Test VER 5A 72 DRIVEABILITY Symptom P 0141 1 2 O2S HEATER FAILURE When Monitored and Set Condition P 0141 1 2 O2S HEATER FAILURE When Monitored With the ignition key off after the engine cools down Set Condition sensor output signal is received when the PCM powers up the sensor heater POSSIBLE CAUSES 1 2 2 SENSOR CONNECTOR DAMAGED 1 2 2 SENSOR GND CIRCUIT OPEN ASD RELAY OUTPUT CIRCUIT OPEN 1 2 2 SENSOR FAILURE 1 2 2 SENSOR HEATER ELEMENT FAILURE 1 2 025 HEATER FAILURE DOES REOCCUR APPLICABILITY With the DRB read the DTCs All Is the GLOBAL GOOD TRIP counter displayed and equal to zero Yes gt GoTo 2 GoTo 3 Turn Ignition On Engine Off wait three minutes With the DRB monitor the O2 Sensor voltage for few minutes until the voltage stabilizes between 4 and 6 volts With the DRB actuate the O2 Heater test Monitor O2 voltage for up to two minutes 15 the O2 Sensor voltage still between 4 and 6 volts Yes gt GoTo 3 gt GoTo 4 At this time the 1 2 025 HEATER FAILURE does not exist or is an intermittent problem With the DRB read the FREEZE FRAME DATA With this screen attempt to duplicate the condition that has set this fault While using FREEZE FRAME DATA pay particular attention to the fault setting conditions such as speed temp load and map vacuum Does the 1 2 025 HEATER FAI
342. pair the Fuel Line as necessary Perform Powertrain Verification Test VER 2A GoTo 19 Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Release the fuel pressure Install Fuel Pressure Gauge between Fuel Tank and Fuel Filter Key on With the DRB actuate the ASD Fuel System test 15 fuel pressure at least 5 psi higher than the previously recorded pressure Yes Release the Fuel Pressure Replace the Fuel Filter Perform Powertrain Verification Test VER 2A No gt GoTo 20 Ignition Off ENGINE 3 0L V6 Werning The Fuel System must be opened and may be under high pressure Release the fuel pressure Install Fuel Pressure Gauge between Fuel Tank and Fuel Filter Key on With the DRB actuate the ASD Fuel System test 15 fuel pressure at least 5 psi higher than the previously recorded pressure Yes Test Complete No Releasethe Fuel Pressure Replace the Fuel Pump and Regulator Assembly Perform Powertrain Verification Test VER 2A 241 DRIVEABILITY Symptom CHECKING IDLE AIR CONTROL MOTOR POSSIBLE CAUSES ENGINE SPEED WITHIN TOLERANCE IAC MOTOR CONNECTOR OBSERVABLE DEFECT ENGINE HAS VACUUM LEAKS IAC MOTOR DEFECTIVE APPLICABILITY Engine Running With the DRB in actuator tests set the engine speed to 1400 RPM and then to 900 RPM Did the engine RPM go from 1400 RPM to 900 RPM Yes With the stop all tests
343. pair the open CMP Sensor Ground Circuit to the Harness splice Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Camshaft Position Sensor Connector Note Check connectors Clean repair as necessary 15 any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 18 116 APPLICABILITY ENGINE 2 0L and 2 4L ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV ENGINE 3 3L V6 and or ENGINE 3 8L V6 and or EN GINE 3 3L V6 FFV DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 3L V6 Disconnect the Camshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 8L V6 and or EN Connect one end of a jumper wire to the CMP Sensor Signal Circuit GINE 3 3L V6 Ignition On Engine Not Running FFV With the DRB monitor the CMP state while tapping the other end of the jumper to Sensor Ground Does the current CMP state change Yes gt GoTo 19 No gt GoTo 20 Ignition Off ENGINE 3 3L V6 Remove the Camshaft Position Sensor and or ENGINE Note Check connectors Clean repair as necessary 3 8L V6 and or EN Inspect the Camshaft Sprocket per se
344. poor connection high resistance on 025 Signal Circuit Perform VERIFICATION TEST VER 5A3 At this time the 1 2 025 SLOW RESPONSE does not exist or is an intermittent problem With the DRB read the FREEZE FRAME DATA With this screen attempt to duplicate the condition that has set this fault While using FREEZE FRAME DATA pay particular attention to the fault setting conditions such as speed temp load and map vacuum Does the 1 2 025 SLOW RESPONSE reoccur Yes gt GoTo 5 No 12 02S SLOW RESPONSE no longer exists Perform VERIFICATION TEST VER 5A3 The following are possible causes for O2 Sensor Slow Response exhaust leak fuel contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Start the Engine Check the Exhaust System for leaks between the Engine and the catalyst Are there any leaks Yes Repair or replace leaking Exhaust System as necessary Perform VERIFICATION TEST VER 5A3 No GoTo 7 The following are possible causes for O2 Sensor Slow Response exhaust leak fuel contamination O2 sensor failure electrical wiring connectors electrical mechanical and O2 heater failure Turn Ignition On Engine Off Using a voltmeter backprobe 025 Signal Circuit between O2S Connector 025 Signal and PCM Connector 025 Signal 15 the voltage drop reading below 0 10 VDC Yes gt GoTo 8 No Repair poor connection high resistance 025
345. put test Refer to the appropriate service information as necessary 4 Start the engine and set engine speed to 2000 RPM for at least thirty seconds 5 Turn the ignition OFF 6 Turn the ignition ON with the engine not running 7 With the DRBIII Read the DTC s If the DTC returns any other symptom DTC is present refer to the symptom list for further diagnostic testing procedures Check for any Technical Service Bulletins that may apply 8 If there are no 5 present all components are functioning properly the repair is complete 318 APPLICABILITY All VERIFICATION TESTS Verification Tests Continued VERIFICATION TEST VER 4A APPLICABILITY Speed Control Verification All Use this test to verify that the Speed Control symptom has been repaired and that the vehicle can be returned to the customer Note If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 With the DRBIII Clear 3 Road test the vehicle at a speed above 35 MPH
346. r miswiring Perform Powertrain Verification Test VER 5A gt GoTo 30 Ignition Off ENGINE 2 0L Disconnect the PCM and 2 4L 1 4 Note Check connectors Clean repair as necessary DOHC Inspect all Terminals Is any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout or miswiring Perform Powertrain Verification Test VER 5A GoTo 31 Ignition Off ENGINE 2 0L Remove the Crankshaft Position CKP Sensor 2 4L 1 4 Inspect the Crankshaft notches for debris or damage DOHC Are the Crankshaft notches damaged Yes Repair or replace the Crankshaft as necessary Perform Powertrain Verification Test VER 5A No Replace the Crankshaft Position Sensor Perform Powertrain Verification Test VER 5A 197 DRIVEABILITY Symptom P 1398 MISFIRE ADAPTIVE NUMERATOR AT LIMIT When Monitored and Set Condition P 1398 MISFIRE ADAPTIVE NUMERATOR AT LIMIT When Monitored Under closed throttle decel A C off engine coolant temp gt 23 degrees C 75 degrees F longer than 50 seconds after engine start The speed at which the deceleration occurs must be sufficient for the given gear range e g gt 36 Km h 36 mph in first gear gt 104 Km h gt 65 in high gear Set Condition When of the CKP Sensor target windows 15 degrees 60 degrees F has more than 2 86 variance from the reference window POSSIBLE CAUSES CKP SENSOR CONNECTOR OBSERVABLE DEFE
347. rain Verification Test VER 5A No Test Complete 37 DRIVEABILITY Symptom P 0117 ECT SENSOR VOLTAGE TOO LOW ETE ee When Monitored and Set Condition P 0117 ECT SENSOR VOLTAGE TOO LOW When Monitored With the ignition on Set Condition The engine coolant temperature sensor circuit voltage at PCM cavity 26 goes below 5 volt for more than 3 seconds POSSIBLE CAUSES ECT SENSOR VOLTAGE ABOVE 4 0 VOLTS ECT SENSOR SIGNAL CIRCUIT SHORT TO GROUND ECT SENSOR SIGNAL CIRCUIT SHORTED TO GROUND CKT ECT WIRING HARNESS INTERMITTENT DEFECT ECT WIRING HARNESS OBSERVABLE DEFECT PCM DEFECTIVE ECT SENSOR V LOW APPLICABILITY Ignition On Engine Not Running All With the DRB read the Engine Coolant Temperature ECT Sensor voltage 15 the Engine Coolant Temperature Sensor voltage below 0 5 volt Yes gt GoTo 2 gt GoTo 6 Ignition Off Disconnect the Engine Coolant Temperature ECT Sensor Connector Note Check connectors Clean repair as necessary Ignition on engine not running With the DRB read the Engine Coolant Temperature Sensor voltage Is the ECT Sensor voltage above 4 0 volts Yes Replace the Engine Coolant Temperature Sensor Perform Powertrain Verification Test VER 5A No gt GoTo 3 38 DRIVEABILITY P 0117 ECT SENSOR VOLTAGE TOO LOW Continued APPLICABILITY Ignition Off Disconnect the Engine Coolant Temperature Sensor ECT Connector Note Check con
348. red followed by fuel pulses determined by a crank time strategy Cold engine operation is deter mined via an open loop strategy until the O2 sensors have reached operating temperature At this point the strategy enters a closed loop mode where fuel requirements are based upon the state of the O2 sensors engine speed MAP throttle posi tion air temperature battery voltage and coolant temperature GENERAL INFORMATION 3 2 2 ON BOARD DIAGNOSTICS has been programmed to monitor many different circuits of the fuel injection system This monitoring is called on board diagnosis Certain criteria or arming conditions must be met for a trouble code to be entered into the PCM memory The criteria may bea range of enginerpm engine temperature and or input voltage to the PCM If a problem is sensed with a monitored circuit and all of the criteria or arming conditions are met then a trouble code will be stored in the PCM It is possible that a trouble code for a monitored circuit may not be entered into the PCM memory even though a malfunction has occurred This may happen because one of the trouble code criteria arming conditions have not been met The PCM compares input signal voltages from each input device with specifications the estab lished high and low limits of the range that are programmed into it for that device If the input voltage is not within specifications and other trou ble code criteria
349. ressure gauge Note Fuel pressure specification is 49 2 psi 5 psi Choose a conclusion that best matches your fuel pressure reading Below Specification GoTo 9 Within Specification GoTo 13 Above Specification Replace the fuel filter pressure regulator Caution Stop ALL Actuations Check for any of the following conditions mechanical problems ENGINE VACUUM must be at least 13 inches in neutral ENGINE VALVE TIMING must be within specifications ENGINE COMPRESSION must be within specifications ENGINE EXHAUST SYSTEM must be free of any restrictions or leaks ENGINE PVC SYSTEM must flow freely TORQUE CONVERTER STALL SPEED must be within specifications POWER BRAKE BOOSTER no internal vacuum leaks FUEL must be free of contamination FUEL INJ ECTOR plugged or restricted injector control wire not connected to correct injector Are there any engine mechanical problems Yes gt Repair as necessary Perform FUEL SYSTEM MISFIRE MONITOR VERIFICATION TEST GoTo 10 Turn ignition off Warning The fuel system is under a constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Raise vehicleon hoist and disconnect the fuel pressure line at the fuel pump module Install special 5 16 fuel line adapter tool 6539 between disconnected fuel line and the fuel pump module Attach a fuel pressure tes
350. rification Test VER 5A No gt GoTo 11 161 DRIVEABILITY P 0505 IDLE AIR CONTROL MOTOR CIRCUITS Continued ACTION APPLICABILITY Start engine and let idle Disconnect the Motor Connector Note Check connectors Clean repair as necessary Using a Voltmeter measure the IAC Driver 4 Circuit Was the voltage over 5 0 volts at any time Yes gt GoTo 14 No Refer symptom 0505 IDLE AIR CONTROL MOTOR CIR CUIT in the DRIVEABILITY category Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Is any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 15 Ignition Off All Disconnect the Motor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using Ohmmeter measure the resistance between the IAC 1 Driver and 2 8 4 Drivers Is the resistance below 5 0 ohms on any of the Drivers Yes Repair the IAC Driver Circuits shorted together Perform Powertrain Verification Test VER 5A No GoTo 16 Ignition Off Disconnect the Motor Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Using Ohmmeter measure the resistance between the
351. rt the Engine and observe the CMP Sensor voltage pattern on the Oscilloscope Are there any of the Camshaft Position Sensor Signals missing Yes gt GoTo 23 No GoTo 27 Ignition Off ENGINE 2 0L Disconnect the CMP Sensor Connector and 2 4L 1 4 Note Check connectors Clean repair as necessary DOHC Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout miswiring Perform Powertrain Verification Test VER 5A No gt GoTo 24 Ignition Off ENGINE 2 0L Disconnect the PCM 2 4L 1 4 Note Check connectors Clean repair as necessary DOHC Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout miswiring Perform Powertrain Verification Test VER 5A No GoTo 25 Ignition Off ENGINE 2 0L Disconnect the CMP Sensor Connector and 2 4L 1 4 Note Check connectors Clean repair as necessary DOHC Remove amp inspect the CMP Sensor amp Target Magnet for damage or misalignment Is the Camshaft Target Magnet okay Yes gt GoTo 26 Repair or replace Camshaft Target Magnet as necessary Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 2 0L Disconnect the CMP Sensor Connector and 2 4L 1 4 Note Check connectors Clean repair as necessary DOHC Remove and inspect the CMP Sensor and Target Magnet for damage or mis alignment Check Camshaft endpla
352. rvice manual instructions GINE 3 3L V6 15 the Camshaft Sprocket okay FFV Yes Replace the Camshaft Position Sensor Perform Powertrain Verification Test VER 5A No Repair as necessary Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 3L V6 Disconnect the Camshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 8L V6 and or EN Disconnect the Powertrain Control Module GINE 3 3L V6 Note Check connectors Clean repair as necessary FFV Using an Ohmmeter measure the resistance of the CMP Sensor Signal Circuit from the CMP Sensor Connector to the PCM Is the resistance below 5 0 ohms Yes gt GoTo 21 No Repair the open CMP Sensor Signal Circuit Perform Powertrain Verification Test VER 5A Ignition Off ENGINE 3 3L V6 Disconnect the Camshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 8L V6 and or EN Disconnect the Powertrain Control Module GINE 3 3L V6 Note Check connectors Clean repair as necessary FFV Using an Ohmmeter measure the resistance between the CMP Sensor Signal Circuit and the 8 Volt Supply Circuit at the CMP Sensor Connector Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to the 8 volt Supply Circuit Perform Powertrain Verification Test VER 5A No GoTo 22 117 DRIVEABILITY P 0340 NO CAM SIGNAL AT PCM Con
353. s gt GoTo 6 No Repair the open Ignition Switch Output Start Circuit Perform Powertrain Verification Test VER 1A Ignition Off Disconnect the Starter Relay Connector Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary With an ohmmeter test the Starter Relay Control Circuit for resistance 15 the resistance above 5 0 ohms Yes gt Repair the open Starter Relay Control Circuit Perform Powertrain Verification Test VER 1A GoTo 7 Ignition Off Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary Warning The Transmission must bein park and the Parking Brake must be on for the next step Warning The Engine may be cranked in the next step Keep away form moving Engine parts Connect a jumper wire between the Starter Relay Control Circuit and ground Briefly turn the Ignition to the crank position and then release Did the Engine crank yes GoTo 8 Replace the Starter Relay Perform Powertrain Verification Test VER 1A 297 STARTING NO CRANK CONDITION Continued ACTION APPLICABILITY If there are no potential causes remaining the Powertrain Control Module is All assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 1A Ignition Off Ensure the Transmission is in Park With the DRB read the Park Neutral Position Switch
354. s necessary 3 Attempt to start the engine 4 If the No Start condition is still present refer to the symptom list and perform diagnostic testing as necessary Refer to any Technical Service Bulletins that may apply 5 Run the engine for one warm up cycle to verify proper operation With the DRBIII confirm that no are present and that all components are functioning properly 6 If DTC s are present refer to the symptom list and perform diagnostic testing as necessary VERIFICATION TEST VER 2A APPLICABILITY Verification ALL Use this test to verify that a symptom has been repaired and that the vehicle can be returned to the customer A symptom is a comprehensive component related symptom that is not the result of a failed major monitor Note If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 With the DRBIII Clear and Reset Memory all engine values 3 Run the engine for one warm up cycle to verif
355. s the LOAD VALUE over 50 and the temp normal 3 3L V6 and or EN operating temp GINE 3 8L V6 and or ENGINE 3 3L V6 FFV Yes gt GoTo 11 No gt GoTo 13 Engine Off ENGINE 3 0L V6 Connect a suitable engine analyzer to the engine and or ENGINE Allow the Engine to idle 3 3L V6 and or EN NOTE If the Engine will not idle maintain a constant RPM above idle GINE 3 8L V6 NOTE Set the scope to read display or parade pattern and or ENGINE Remove any spark plug wire 3 3L V6 FFV Observe the Secondary KV Line 15 the open secondary voltage at least 25 KV Yes gt GoTo 12 No Replace the Electonic Ignition Coil Perform VERIFICATION TEST VER 5A2 106 DRIVEABILITY P 0305 CYLINDER 5 MIS FIRE Continued ACTION APPLICABILITY Engine Off ENGINE 3 0L V6 Connect a suitable engine analyzer to the engine and or ENGINE Allow the Engine to idle 3 3L V6 and or EN NOTE If the Engine will not idle maintain a constant RPM above idle GINE 3 8L V6 NOTE Set the scope to read display or parade pattern and or ENGINE Follow the equipment manufacturer s procedure for pattern analysis 3 3L V6 FFV Is the secondary ignition pattern OK Yes gt GoTo 13 No Repair the indicated component the Secondary Ignition Sys tem Perform VERIFICATION TEST VER 5A2 With the DRB read the FREEZE FRAME DATA ENGINE 3 0L V6 Use the freeze frame data and attempt to determine the cause of the misfire and or E
356. sary Connect a jumper wire between the ECT Sensor Signal Circuit and an engine ground Turn the ignition on with the engine not running With the DRB read the Engine Coolant Temperature Sensor voltage Is the voltage below 1 0 volt Yes Repair the open ECT Sensor Ground Circuit Perform Powertrain Verification Test VER 5A No gt GoTo 4 Ignition Off Disconnect the ECT Sensor Connector Note Check connectors Clean repair as necessary Disconnect the PCM Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure the ECT Sensor Signal Circuit from the PCM to the ECT Is the resistance below 5 0 ohms Yes gt GoTo 5 No Repair the open ECT Sensor Signal Circuit Perform Powertrain Verification Test VER 5A Ignition Off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running Use the schematic as a guide and wiggle the ECT Sensor Connector amp Harness Monitor the DRB display Was there any ECT Sensor voltage change Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A No gt GoTo 7 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER
357. sconnect the Injector 2 Connector Note Check connectors Clean repair as necessary 87 DRIVEABILITY P 0202 INJ ECTOR 2 CONTROL CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes Repair as necessary Perform Powertrain Verification Test VER 5A Test Complete 88 DRIVEABILITY Symptom P 0203 INJ ECTOR 3 CONTROL CIRCUIT When Monitored and Set Condition P 0203 INJ ECTOR 3 CONTROL CIRCUIT When Monitored With battery voltage greater than 12 volts the auto shutdown relay energized injector pulse width less than 10ms and engine speed less than 3000 rpm Set Condition This trouble code takes 64 to 10 0 seconds to set when no inductive kick is sensed 18ms after injector turn off and with no other injectors on POSSIBLE CAUSES ASD RELAY OUTPUT CIRCUIT OPEN FUEL INJ ECTOR DEFECTIVE ECTOR 3 DRIVER CIRCUIT OPEN ECTOR 8 DRIVER CIRCUIT SHORTED TO GROUND PCM DEFECTIVE ACTION APPLICABILITY Ignition Off All Start engine let idle for at least 20 seconds Key on engine off With the DRB read Trouble Codes Is the Global Good Trip counter displayed and equal to zero Yes gt GoTo 2 gt GoTo 7 Ignition Off Note It may be necessary to remove the Intake Plenum in the following steps Disconnect the Injector 3 Connector Note Check connectors Clear repair
358. sed loop mode Acceleration Mode This is a closed loop mode ThePCM recognizes an increase in throttle position and a decrease in manifold vacuum as engine load increases response the PCM increases the jector pulse width to meet the increased load The A C compressor may be de energized for a short period of time Deceleration This is a closed loop mode The PCM recognizes a decrease in throttle position and an increase in manifold vacuum as engine load decreases In response the PCM decreases the injector pulse width to meet the decreased load Full injector shut off may be obtained during high speed deceleration Wide Open Throttle Mode This is an open loop mode The throttle position sensor notifies the PCM of a wide open throttle condition Once a wide open throttle is sensed the PCM de energizes the A C compressor clutch relay for 15 seconds 3 2 5 NON MONITORED CIRCUITS The PCM does not monitor the following circuits systems and conditions even though they could have malfunctions that result in driveability prob lems A diagnostic code may not be displayed for the following conditions However problems with these systems may cause a diagnostic code to be displayed for other systems For example a fuel pressure problem will not register a diagnostic code directly but could cause a rich or lean condition This could cause an oxygen sensor fuel system or misfire monitor trouble code to be stored in the PCM
359. t Yes Replace the Transmission Control Module Perform Powertrain Verification Test VER 5A gt GoTo 7 If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 46 DRIVEABILITY P 0122 THROTTLE POSITION SENSOR VOLTAGE LOW Continued ACTION APPLICABILITY Ignition on engine not running All With the DRB read the Throttle Position Sensor TP Sensor voltage Wiggle Throttle Position Sensor Connectors and Harness Monitor the DRB display Was there any change in the Throttle Position Sensor voltage when wiggled Yes Repair the Harness or Connector that caused the voltage change Perform Powertrain Verification Test VER 5A No gt GoTo 9 Ignition Off Using the schematic as a guide inspect the Wiring and Connectors Were any problems found Yes gt Repair as necessary Perform Powertrain Verification Test VER 5A GoTo 10 Ignition On Engine Not Running With the DRB read the Throttle Position Sensor TP Sensor voltage While monitoring the slowly open and dose the Throttle 15 the voltage change smooth Yes gt Test Complete No Replace the Throttle Position Sensor Perform Powertrain Verification Test VER 5A 47 DRIVEABILITY Symptom P 0123 THROTTLE POSITION SENSOR VOLTAGE HIGH em When Monitored and Set Condition
360. t GoTo 3 No Refer tosymptom 0340 NO CRANK REFERENCE SIGNAL PCM in the DRIVEABILITY category 276 STARTING Symptom CHECKING THE ENGINE MECHANICAL SYSTEMS POSSIBLE CAUSES ENGINE COMPRESSION OUT OF SPECIFICATION VALVE TIMING OUT OF SPECIFICATION POWERTRAIN CONTROL MODULE DEFECTIVE CLEAN SPARK PLUGS SPARK PLUG CABLES POSITIONED INCORRECTLY ACTION APPLICABILITY Turn Ignition off Inspect Spark Plug Cables for correct placement Are all Spark Plug Cables positioned correctly Yes gt GoTo 2 No Reinstall Spark Plug Cables as necessary Turn Ignition off Remove all Spark Plugs and inspect the tips for wet fuel Are the Spark Plug tips wet Yes Clean the spark plugs No gt GoTo 3 Turn Ignition off Using service information procedures check Engine Valve timing Is Valve timing within specifications Yes gt GoTo 5 No Repair Valve timing as necessary Perform Verification Test VER 1A If there are no potential causes or DTCs remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 1A Turn Ignition off All Using service information procedures check Engine compression 15 Engine compression within specifications Yes gt GoTo 4 No Repair the Engine as necessary Perform Verification Test VER 1A 277 STARTING Symptom CHECKING THE FUEL SYST
361. t Speed Sensor Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 20 If there are no potential causes remaining the Output Speed Sensor is assumed to be defective View repair options Repair Replace the Output Speed Sensor Perform Powertrain Verification Test VER 5A Ignition Off Disconnect theTransmission Control Module Note Check connectors Clean repair as necessary Using an Ohmmeter measure between the Speed Sensor Ground Circuit and the Output Speed Sensor Circuit at the TCM Connector 15 the resistance between 300 0 and 1200 0 ohms Yes Replace the Transmission Control Module reprogram Pinion Factor and perform quick learn procedure Perform Powertrain Verification Test VER 5A No GoTo 22 Ignition Off Disconnect the Transmission Control Circuit Disconnect the Output Speed Sensor Note Check connectors Clean repair as necessary Using Ohmmeter measure the Speed Sensor Ground Circuit from the TCM tothe Output Speed Sensor 15 the resistance under 5 0 ohms Yes gt GoTo 23 No Repair the open Speed Sensor Ground Circuit Perform Powertrain Verification Test VER 5A 157 APPLICABILITY ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V6 and or EN GINE 3 8L V6 w EATX ENGINE 2 0L 2 4L 3 3L V6 FFV and or ENGINE 3 3L V
362. t flow freely TORQUE CONVERTER STALL SPEED must be within specifications POWER BRAKE BOOSTER internal vacuum leaks FUEL must be free of contamination FUEL INJ ECTOR plugged or restricted injector control wire not connected to correct injector Are there any engine mechanical problems Yes Repair as necessary Perform FUEL SYSTEM MISFIRE MONITOR VERIFICATION TEST GoTo 12 Turn ignition off Warning The fuel system is under constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Disconnect the fuel supply line at the fuel rail Connect fuel line adapter 6539 5 16 or 6631 3 8 to the disconnected fuel supply line Insert the other end of the adapter into a graduated container Caution Do not operate the fuel pump for more than 7 seconds in the next step Fuel pump module reservoir may run empty and damage to the fuel pump may result Specification A good fuel pump will deliver at least 1 4 liter of fuel in 7 seconds With the DRB actuate the ASD Fuel System test for 7 seconds 15 the fuel pump capacity within specification Yes Test Complete Check for a kinked damaged fuel supply line between the fuel tank and fuel rail If OK replace the fuel filter pressure regulator Caution Stop ALL Actuations The conditions required to set the DTC no longer present With the DRB re
363. t gauge the fitting on tool 6539 Ignition on With the DRB actuate the ASD Fuel System test and observe the fuel pressure gauge Note Fuel pressure specification is 49 2 psi 5 psi 15 the fuel pressure within specification now Yes Repair the restriction in the chassis fuel supply line between the fuel tank and fuel rail No gt Goto 11 Caution Stop ALL Actuations 81 0172 1 1 FUEL SYSTEM RICH Continued ACTION APPLICABILITY Warning The fuel system is under a constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer Is the Fuel Inlet Strainer plugged Yes Replace the Fue Inlet Strainer No GoTo 12 If there are no potential causes remaining the Fuel Pump Module 15 assumed to be defective View repair options Repair Replace the Fuel Pump Module TEST Test Complete The conditions required to set the DTC are no longer present With the DRB read and record the freeze frame data and the Fuel System Similar Conditions Window data Utilize the data and try to duplicate the operating conditions at which the DTC was set Pay particular attention to the ECT and RPM for added diagnostics Note Refer to any TSB s that may apply to the symptom Test Complete Repair Check for any of the following conditio
364. tch Output Circuit at the Solenoid Connector Is the voltage above 10 0 volts Yes gt GoTo 6 No Repair the open Fused Ignition Switch Output Circuit Perform Powertrain Verification Test VER 6A Ignition Off Disconnect the LDP Solenoid Note Check connectors Clean repair as necessary Disconnect the PCM Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance of the LDP Solenoid Control Circuit at the PCM Connector to ground Is the resistance below 5 0 ohms Yes Repair the LDP Solenoid Circuit for a short to ground Perform Powertrain Verification Test VER 6A gt GoTo 7 Ignition Off Disconnect the LDP Solenoid Note Check connectors Clean repair as necessary Disconnect the PCM Note Check connectors Clean repair as necessary With an Ohmmeter measure the resistance of the LDP Solenoid Control Circuit from the PCM Connector to the LDP Connector 15 the resistance below 5 0 ohms Yes gt GoTo 8 No Repair the open LDP Solenoid Control Circuit Perform Powertrain Verification Test VER 6A 210 DRIVEABILITY P 1495 LEAK DETECTION PUMP SOLENOID CIRCUIT Continued ACTION APPLICABILITY Ignition Off All Disconnect the PCM Note Check connectors Clean repair as necessary Key on With a Voltmeter measure voltage of the LDP Solenoid Control Circuit at the PCM Connector Is the voltage above 10 0 volts Yes gt GoTo 9
365. test complete No GoTo 2 Engine Running Inspect the engine for any vacuum leak s 15 there any vacuum leaks Yes Repair Vacuum Leak s as necessary Perform Powertrain Verification Test VER 2A No GoTo 3 Did the test light turn on and off at any time for each IAC driver circuit Yes gt GoTo 4 gt GoTo 5 Turn the ignition off Disconnect the IAC motor harness connector Start the engine and allow it to idle Using a test light connected to battery positive probe the IAC Driver 1 circuit Repeat the above test for the remaining IAC Driver circuits Did the test light turn on and off at any time for each IAC driver circuit Yes gt GoTo 6 No GoTo 8 Turn the ignition off All Disconnect the motor harness connector Start the engine and allow it toidle Using a test light connected to ground probe the IAC Driver 1 circuit Repeat the above test for the remaining IAC Driver circuits 242 DRIVEABILITY CHECKING IDLE AIR CONTROL MOTOR Continued APPLICABILITY Turn the ignition on Disconnect the motor harness connector Disconnect the PCM harness connector Measure the resistance of the IAC motor driver circuit s that indicated no test light illumination 15 the resistance below 5 0 ohms Yes gt GoTo 8 No Repair the open IAC motor driver circuit s Perform Powertrain Verification Test VER 2A If there are potential causes remaining
366. the Coil Connector Note Check connectors Clean repair as necessary Key On With the DRB actuate Ignition Coil With a Voltmeter measure the ASD Output Circuit 15 the voltage above 10 volts Yes gt GoTo 6 No gt GoTo 11 Ignition Off ENGINE 3 0L V6 Disconnect Ignition Coil Connector Note Check connectors Clean repair as necesary Using Ohmmeter measure each Coil Primary Circuit for resistance 15 the resistance below 2 0 ohms for each measurement Yes gt GoTo 7 No Replace the Ignition Coil Perform Powertrain Verification Test VER 1A 289 STARTING CHECKING THE SECONDARY IGNITION SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Disconnect Ignition Coil Connector Note Check connectors Clean repair as necesary Is any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 1A GoTo 8 Ignition Off ENGINE 3 0L V6 Disconnect the Ignition Coil Connector Note Check connectors Clean repair as necessary Disconnect the Powertrain Control Module Note Check connectors Clean repair as necessary With an Ohmmeter test the resistance of the Ignition Coil Driver Circuit Is the resistance below 5 0 ohms Yes gt GoTo 9 No Repair the open Ignition Coil Driver Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 3 0L V6 Disconn
367. the Fuel Tank Is the Fuel Pump operating Yes gt GoTo 3 GoTo 13 Ignition On Engine Not Running ENGINE 3 0L V6 With DRB read Throttle Position Sensor voltage Is the voltage above 1 5 volts Yes Disconnect the TP Sensor Conn Replace Throttle Position Sensor Perform Powertrain Verification Test VER 1A No gt GoTo 4 Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Relieve Fuel pressure Install a Fuel Pressure Gauge to the Fuel Rail Note The Fuel Tank must be at least 1 4 full for the following tests Ignition On Engine Not Running With the DRB actuate the Fuel System Read the Fuel Pressure Gauge Fuel pressure should be 43 to 53 psi for Gasoline 15 the Fuel pressure above the specification Yes gt GoTo 5 gt GoTo 8 Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Release the Fuel pressure Inspect Fuel Filter for a restriction 15 there restriction Yes Replace the Fuel Filter Perform Powertrain Verification Test VER 1A No gt GoTo 6 279 STARTING CHECKING THE FUEL SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Warning The Fuel System must be opened and may be under high pressure Release the Fuel pressure Inspect Fuel Filter for a restriction 15 there restriction Yes gt GoTo 7 No Replace the Fuel Pr
368. the PCM SION AUTO to the TRS STICK 15 the resistance below 5 0 ohms Yes gt GoTo 12 Repair open Park Neutral Switch Sense Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the Transmission Range Sensor is TRANSMISSION assumed to be defective AUTOMATIC View repair options 4 SPD 41TE and or TRANSMIS SION AUTO STICK Repair Replace the TRS Perform Powertrain Verification Test VER 5A 309 TRANSMISSION Symptom List ANTENNA FAILURE COP FAILURE EEPROM FAILURE INTERNAL FAULTS RAM FAILURE SERIAL LINK INTERNAL STACK OVERFLOW FAILURE Test Note All symptoms listed above are diagnosed using the same tests The title for the tests will be ANTENNA FAILURE When Monitored and Set Condition EEPROM FAILURE When Monitored At ignition ON and during the SKIM programming process which programs SKIM s PIN the VIN country code or additional keys Set Condition This condition is set when an error occurs during programming the SKIM s EEPROM The other condition that causes this code to matureis an EEPROM 2 link failure POSSIBLE CAUSES SKIM INTERNAL DTC FAILURE ACTION APPLICABILITY Note This trouble code indicates an internal SKIM fault All With the DRBIII read and record SKIM and then erase SKIM DTC s Perform several key cycles leaving the key on for a minimum of 30 seconds per cycle With the DRBIII read SKIM trouble co
369. the Powertrain Control Module is All assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 2A 174 DRIVEABILITY Symptom 1195 SLOW 1 1 025 DURING CATALYST MONITOR When Monitored and Set Condition P 1195 SLOW 1 1 025 DURING CATALYST MONITOR When Monitored With the engine running coolant greater than 76 deg C 170 deg F open throttle steady to slight increasing vehicle speed gt 28 Km h 18 mph lt 88 Km h 55 mph with a light load on the engine for a period no less than five minutes Set Condition The upstream oxygen sensor signal voltage is switching from below 0 39 volt to above 0 6 volt and back fewer times than required POSSIBLE CAUSES OXYGEN SENSOR GROUND CIRCUIT OPEN 1 1 OXYGEN SENSOR CONNECTOR OBSERVABLE DEFECT 1 1 OXYGEN SENSOR DEFECTIVE ENGINE FLUID CONSUMPTION EXHAUST SYSTEM LEAKING PCM CONNECTOR OBSERVABLE DEFECT ACTION APPLICABILITY Start Engine All Note Check the Exhaust for excessive smoke caused by oil or coolant consumption 15 there an or coolant consumption condition present Yes Repair engine mechanical as necessary and replace U pstream 02 Sensor Perform Powertrain Verification Test VER 5A GoTo 2 Start Engine Check the Exhaust System for leaks between Engine and Catalytic Converter 15 there any Exhaust leak Yes Repair or replace leaking Exhaust parts as necessary Perform Powertrain Verification
370. the indicated component the Secondary Ignition Sys tem Perform Powertrain Verification Test VER 2A Ignition Off Connect a suitable Engine Analyzer to the engine Start the Engine and allow it to idle Note If the engine will not idle maintain a constant RPM above idle Set scope to read display or parade pattern Follow the equipment manufacturer s procedure for pattern analysis Note Do not spray the Inductive Pickup With a spray bottle spray the Ignition Cables with water and monitor Ignition Pattern Did the Ignition Pattern change Yes Repair the indicated component in the Secondary Ignition Sys tem Perform Powertrain Verification Test VER 2A GoTo 3 Ignition Off Connect a suitable Engine Analyzer to the engine Start the engine and allow it toidle Note If the engine will not idle maintain a constant RPM above idle Note Set the scope to read display or parade pattern Follow the equipment manufacturer s procedure for pattern analysis Momentarily remove and reinstall the Spark Plug Wires While disconnecting each wire observe the secondary KV line 15 the open circuit Secondary voltage at least 25K V Yes gt Test Complete No Replace the Ignition Coil Perform Powertrain Verification Test VER 2A 252 DRIVEABILITY Symptom CHECKING THE ENGINE MECHANICAL SYSTEMS POSSIBLE CAUSES CHECKING ENGINE MECHANICAL SYSTEMS ACTION APPLICABILITY At this point in the diagnos
371. the voltage above 1 5 volts Yes Disconnect the TP Sensor Conn Replace Throttle Position Sensor Perform Powertrain Verification Test VER 1A No gt GoTo 14 Ignition Off ENGINE 3 0L V6 Disconnect the Fuel Pump Harness Connector Note Check connectors Clean repair as necessary Caution It is critical that the Fuel Pump Connector has a clean and tight connection With an Ohmmeter measure the Fuel Pump Ground Circuit Is the resistance below 5 0 ohms Yes gt GoTo 15 No Repair the open Fuel Pump Ground Circuit Perform Powertrain Verification Test VER 1A 281 STARTING CHECKING THE FUEL SYSTEM Continued ACTION APPLICABILITY Ignition Off ENGINE 3 0L V6 Disconnect the Fuel Pump Relay Check connectors Clean repair as necessary Ignition On Engine Not Running With a Voltmeter measure the Fuel Pump Relay Fused B Circuit Is the voltage above 10 0 volts Yes gt GoTo 16 No Repair the open Fuel Pump Relay Fused B Circuit Perform Powertrain Verification Test VER 1A Ignition Off ENGINE 3 0L V6 Disconnect the Fuel Pump Harness Connector Note Check Connectors clean repair as necessary Caution It is critical that the Fuel Pump Connector has a clean and tight connection Ignition On Engine Not Running Actuate the ASD Fuel System test With a Voltmeter measure the Fuel Pump Relay Output Circuit 15 the voltage above 10 0 volts Yes gt GoTo 17 No Repair the ope
372. tic test procedure you have determined that all of the All engine electrical systems are operating as designed therefore they are not the cause of the driveability problem The following additional items should be checked as possible mechanical causes of the problem ENGINE VACUUM must be at least 13 inches in neutral ENGINE VALVE TIMING must be within specifications ENGINE COMPRESSION must be within specifications CAMSHAFT LOBES check for abnormal wear CRANK SENSOR PICK UP check crankshaft slots for debris deterioration ENGINE EXHAUST SYSTEM must be free of any restrictions ENGINE PCV SYSTEM must flow freely ENGINE DRIVE SPROCKETS must be properly positioned TORQUE CONVERTER STALL SPEED must be within specifications POWER BRAKE BOOSTER internal vacuum leaks FUEL must be free of contamination FUEL INJECTOR plugged or restricted injector control wire not connected to correct injector Note If you came to this test from the oxygen sensor and the rich or lean condition is not caused by one of the first items above replace the power train control module and perform TEST VER 2A Road Test Verification Always look for any Technical Service Bulletins that may relate to the problem Did you come from an Oxygen Sensor rich or lean condition test Yes Replace the Powertrain Control Module Perform Powertrain Verification Test VER 2A No Test Complete 253 DRIVEABILITY Symptom CHECKING
373. tinued ACTION APPLICABILITY Ignition Off ENGINE 3 3L V6 Disconnect the Camshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 8L V6 and or EN Disconnect the Powertrain Control Module GINE 3 3L V6 Note Check connectors Clean repair as necessary FFV Using an Ohmmeter measure the resistance of the CMP Sensor Signal Circuit from the CMP Sensor Connector to a good ground Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to ground Perform Powertrain Verification Test VER 5A No GoTo 23 Ignition Off ENGINE 3 3L V6 Disconnect the Camshaft Position Sensor Connector and or ENGINE Note Check connectors Clean repair as necessary 3 8L V6 and or EN Disconnect the Powertrain Control Module GINE 3 3L V6 Note Check connectors Clean repair as necessary FFV Using an Ohmmeter measure the resistance between the CMP Sensor Signal Circuit and the Sensor Ground Circuit at the CMP Sensor Connector Is the resistance below 5 0 ohms Yes Repair the CMP Sensor Signal Circuit for a short to the Sensor ground Perform Powertrain Verification Test VER 5A GoTo 24 If there are no potential causes remaining the Powertrain Control Module is ENGINE 3 3L V6 assumed to be defective and or ENGINE View repair options 3 8L V6 and or EN GINE 3 3L V6 FFV Repair Replace the PCM Perform Powertrain Verification Test VER 5A
374. tion P 0622 GENERATOR FIELD NOT SWITCHING PROPERLY When Monitored With the ignition key on and the engine not running Set Condition This trouble code sets when the PCM tries to regulate the generator field with no result during monitoring POSSIBLE CAUSES GENERATOR FIELD RESISTANCE gt 5 0 OHMS ASD WIRING HARNESS INTERMITTENT DEFECT ASD WIRING HARNESS OBSERVABLE DEFECT GENERATOR FIELD DRIVE CIRCUIT SHORT TO GROUND GENERATOR FIELD DRIVER CIRCUIT OPEN PCM DEFECTIVE GENERATOR ASD RELAY OUTPUT CIRCUIT OPEN ACTION APPLICABILITY Ignition On Engine Not Running All With the DRB actuate the Generator Field Driver Circuit Backprobe the ASD Relay Output Circuit at the back of the Generator Is the voltage above 10 0 volts Yes gt GoTo 2 No Repair the open ASD Relay Output Circuit Generator to Harness Splice Engine Running With the DRB actuate the Generator Field Driver Circuit Backprobe the Generator Field Driver Circuit at the back of the Generator Does the voltage shift from low to high Yes gt GoTo 3 No GoTo 5 Ignition On Engine Not Running With the DRB actuate the Generator Field Driver Circuit With the DRB read codes Wiggle Wiring Harness from the Generator to PCM Does the Generator Field Driver Circuit code return Yes Repair as necessary where wiggling caused problem to appear Perform Powertrain Verification Test VER 3A No gt GoTo 4 CHARGING P 0622 GENERATOR FIELD
375. tion Test VER 2A Ignition Off Disconnect the Upstream O2 Sensor Connector Note Check connectors Clean repair as necessary Using an Ohmmeter measure the resistance between the H eater Ground Circuit and a good ground Is the resistance below 5 0 ohms Yes gt GoTo 4 No Repair the open Heater Ground Circuit to the Upstream 2 Sensor Perform Powertrain Verification Test VER 2A 247 DRIVEABILITY CHECKING OXYGEN SENSOR HEATER Continued APPLICABILITY If there are potential causes remaining the Upstream O2 Sensor is assumed to be All defective View repair options Repair Replace the Upstream O2 Sensor Perform Powertrain Verification Test VER 2A Ignition Off Turn key on With the DRB actuate the O2 Sensor Heater test Wait two minutes for O2 Sensor voltage to stabilize With the DRB read the Downstream O2 Sensor voltage 15 the voltage of the Downstream O2 Sensor between 0 4 and 0 6 volts Yes gt GoTo 6 No Test complete Note The O2 Sensor voltage staying between 0 4 and 0 6 V indicates a problem with that Sensor Circuit Ignition Off Disconnect the Downstream O2 Sensor Connector Note Check connectors Clean repair as necessary Turn key on With the DRB actuate the O2 Sensor Heater test Using a Voltmeter measure the ASD Relay Output Circuit in Sensor Connector Is the voltage above 10 0 volts Yes gt GoTo 7 No Repair the open ASD Relay Output
376. train Verification Test VER 2A No gt GoTo 4 If there are no potential causes remaining the CKP Sensor is assumed to be ENGINE 3 0L V6 defective and or ENGINE View repair options 3 3L V6 and or EN GINE 3 8L V6 and or ENGINE 3 3L 6 FFV Repair Replace the CKP Sensor Perform Verification Test VER 2A Ignition Off ENGINE 2 0L and Disconnect the Crankshaft Position Sensor Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes gt Repair as necessary Perform Verification Test VER 2A No gt GoTo 6 Ignition Off ENGINE 2 0L and Disconnect the Crankshaft Position Sensor Connector 2 4L 1 4 DOHC Note Check connectors Clean repair as necessary Inspect the Crankshaft Position Sensor for proper Torque and installation Is the Crankshaft Position Sensor properly installed Yes gt GoTo 7 No Properly install CKP Sensor Perform Verification Test VER 2A Ignition Off ENGINE 2 0L and Remove the Crankshaft Position Sensor 2 4L 1 4 DOHC Inspect the notches in the Crankshaft for debris damage or excessive movement 15 there any debris damage or excessive movement Yes gt Repair as necessary Perform Powertrain Verification Test VER 2A No GoTo 8 If there are no potential causes remaining the CKP Sensor is assumed to be ENGINE 2 0L defective 2 4L 1 4 DOHC View repair options
377. train Verification Test VER 5A No gt GoTo 3 Ignition off If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 165 DRIVEABILITY Symptom P 0505D IDLE AIR CONTROL MOTOR CIRCUIT POSSIBLE CAUSES IAC MOTOR DRIVER IAC 8 CIRCUIT OPEN PCM CONN TERM DAMAGED PUSH OUT OR MISWIRED PCM DEF IAC 48 APPLICABILITY Ignition Off All Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Using Ohmmeter measure resistance of the IAC 8 Driver Circuit from the IAC Motor Connector to the PCM Connector 15 the resistance below 5 0 ohms Yes gt GoTo 2 No Repair the open Motor Driver Control Circuit Perform Powertrain Verification Test VER 5A Ignition Off Disconnect the Powertrain Control Module Connector Note Check connectors Clean repair as necessary Visually inspect Connector Is any Terminal damaged pushed out or miswired Yes Repair as necessary Perform Powertrain Verification Test VER 5A No gt GoTo 3 If there are no potential causes remaining the PCM is assumed to be defective View repair options Repair Replace the PCM Perform Powertrain Verification Test VER 5A 166 DRIVEABILITY Symptom 0505 IDLE AIR CONTROL MOTOR CIRCUIT POSSIBLE CAUSES IAC MOTOR DRIVER IAC 4
378. trol Power Supply Ckt 15 the resistance below 5 0 ohms Yes gt GoTo 16 No Repair the open Speed Control Power Supply Circuit Perform Powertrain Verification Test VER 4A If there are no potential causes remaining the Brake Switch is assumed to be All defective View repair options Repair Replace the Brake Switch Perform Powertrain Verification Test VER 4A 259 SPEED CONTROL P 1595 SPEED CONTROL SOLENOID CIRCUITS Continued APPLICABILITY Ignition off All If there are no potential causes remaining the Powertrain Control Module is assumed to be defective View repair options Repair Replace the Powertrain Control Module Perform Powertrain Verification Test VER 4A 260 SPEED CONTROL Symptom SPEED CONTROL BRAKE SWITCH OUTPUT POSSIBLE CAUSES GROUND CIRCUIT OPEN PCM CONNECTOR OBSERVABLE DEFECT BRAKE SWITCH DEFECTIVE BRAKE SWITCH SENSE CIRCUIT OPEN BRAKE SWITCH SENSE CIRCUIT SHORTED TO GROUND PCM DEFECTIVE APPLICABILITY Ignition Off All Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Key on Using a Voltmeter measure the voltage of the Brake Switch Sense at the Brake Switch Connector Is the voltage above 10 volts Yes gt GoTo 2 GoTo 3 Ignition Off Disconnect the Brake Switch Connector Note Check connectors Clean repair as necessary Connect a jumper between the Brake Switch Sense and Bra
379. uel System must be opened and be under high pressure 2 4L 1 4 DOHC Relieve Fuel pressure and or ENGINE Install a Fuel Pressure Gauge to the Fuel Rail 3 3L V6 FFV and or Note The Fuel Tank must be at least 1 4 full for the following tests ENGINE 3 3L V6 Ignition On Engine Not Running and or ENGINE With the DRB actuate the Fuel System 3 8L V6 Read the Fuel Pressure Gauge For 3 3 liter engines fuel pressure should be 50 to 60 psi and for all other engines fuel pressure should be 43 to 53 psi 15 the Fuel pressure above the specification Yes gt GoTo 22 gt GoTo 25 Ignition Off ENGINE 2 0L Warning The Fuel System must be opened and be under high pressure 2 4L 1 4 DOHC Release the Fuel pressure and or ENGINE Inspect Fuel Filter for a restriction 3 3L V6 FFV and or 15 there a restriction ENGINE 3 3L V6 and or ENGINE 3 8L V6 Yes Replace the Fuel Filter Perform Powertrain Verification Test VER 1A GoTo 23 Ignition Off ENGINE 2 0L Warning The Fuel System must be opened and be under high pressure 2 4L 1 4 DOHC Release the Fuel pressure and or ENGINE Inspect Fuel Filter for a restriction 3 3L V6 FFV and or 15 there a restriction ENGINE 3 3L V6 and or ENGINE 3 8L V6 Yes gt GoTo 24 No Replace the Fuel Pressure Regulator Perform Powertrain Verification Test VER 1A 283 STARTING CHECKING THE FUEL SYSTEM Continued
380. um Gauge reading Yes gt GoTo 7 Replace the MAP Sensor Perform Powertrain Verification Test VER 5A Turn ignition On All With the DRB in sensors read the Coolant Tmp Deg value Note If engine coolant temperature is above 82 C 180 F allow the engine to cool until 62 150 F is reached 76 DRIVEABILITY 0171 1 1 FUEL SYSTEM LEAN Continued ACTION APPLICABILITY Turn ignition off Warning The fuel system is under a constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Remove the pressure test port cap at the fuel rail test port Connect a fuel pressure gauge to the test port pressure fitting on the fuel rail Ignition on With the DRB actuate the ASD Fuel System test and observe the fuel pressure gauge Note Fuel pressure specification is 49 2 psi 5 psi Choose a conclusion that best matches your fuel pressure reading Below Specification GoTo 8 Within Specification GoTo 11 Above Specification Replace the fuel filter pressure regulator Caution Stop ALL Actuations fuel tank and fuel rail gt Goto 9 Caution Stop ALL Actuations Warning The fuel system is under a constant pressure even with the engine off Before testing or servicing any fuel system hose fitting or line the fuel system pressure must be released Remove the Fuel Pump Module and inspe
381. ushout miswiring Perform Powertrain Verification Test VER 5A No GoTo 19 Ignition Off ENGINE 3 0L V6 Disconnect the PCM Note Check connectors Clean repair as necessary Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes Repair Terminal s for damage pushout or miswiring Perform Powertrain Verification Test VER 5A No GoTo 20 Ignition Off ENGINE 3 0L V6 Remove the Crankshaft Position CKP Sensor Inspect the Slots in the Flywheel for debris or damage Is the Flywheel damaged Yes Repair or replace as necessary Perform Powertrain Verification Test VER 5A No Replace the Crankshaft Position Sensor Perform Powertrain Verification Test VER 5A Start Engine ENGINE 3 0L V6 At PCM backprobe CKP Sensor Signal Circuit with Oscilloscope s voltage measure ment lead While observing the Oscilloscope pattern wiggle CKP Sensor Circuit from Sensor to PCM Were any CKP Sensor Signals missing when the wiggle test was conducted Yes Note where wiggling the wires caused a missing CKP Sensor signal Repair Camshaft and Crankshaft Wire Harness as neces sary Perform Powertrain Verification Test VER 5A No Test Complete 195 DRIVEABILITY P 1391 INTERMITTENT LOSS OF CMP OR CKP Continued ACTION APPLICABILITY Ignition Off ENGINE 2 0L At the CMP Sensor backprobe the CMP Sensor Signal Circuit with the Oscilloscope and 2 4L l 4 voltage measurement lead DOHC Sta
382. volts AC 500 volts DC Ohms resistance 0 1 12 megohms Frequency Measured 0 10kHz Frequency Generated Temperature 58 1100 F 50 600 C Ohms cannot be measured if voltage is present Ohms can be measured only in a non powered circuit e Voltage between any terminal and ground must not exceed 500v DC or 500v peak AC 12 e Use caution when measuring voltage above 25v DC or 25 The circuit being tested must be protected by a 10A fuse or circuit breaker e Usethe low current shunt to measure circuits up to 10A Use the high current clamp to measure circuits exceeding 10A e When testing for the presence of voltage or cur rent make sure the meter is functioning cor rectly Take a reading of a known voltage or current before accepting a zero reading e When measuring current connect the meter in series with the load e Disconnect the live test lead before disconnecting the common test lead e When using the meter function keep the away from spark plug or coil wires to avoid measuring error from outside interference 4 3 WARNINGS AND CAUTIONS 4 3 1 ROAD TEST WARNINGS Some complaints will require a test drive as part of the repair verification procedure The purpose of the test drive is to try to duplicate the diagnostic code or symptom condition CAUTION BEFORE ROAD TESTING A VEHICLE BE SURE THAT ALL COMPONENTS ARE REASSEMBLED DURING THE TEST DRIVE DO NOT TRY TO READ
383. watch Ohmmeter display Did the display stay below 5 0 ohms at all times Yes Repair the P N Switch Sense Circuit for a short to Ground Perform Powertrain Verification Test VER 5A No gt GoTo 5 Ignition Off TRANSMISSION Disconnect the PCM AUTOMATIC Disconnect the Park Neutral Position Switch Connector 3 SPD 31TH Note Check connectors Clean repair as necessary With Ohmmeter measure the Park Neutral Switch Sense Circuit from the PCM to the Switch 15 the resistance below 5 0 ohms Yes gt GoTo 6 No Repair open P N Switch Sense Circuit Perform Powertrain Verification Test VER 5A If there are no potential causes remaining the P N Position Switch is assumed to TRANSMISSION defective AUTOMATIC View repair options 3 SPD 31TH Repair Replace the Park Neutral Position Switch Perform Powertrain Verification Test VER 5A Ignition On Engine Not Running TRANSMISSION With the DRB read Park Neutral Switch input state AUTOMATIC While moving gear selector in and out of Park and Reverse watch DRB Display 4 SPD 41TE Did the display show P N and and or TRANSMIS SION AUTO Yes gt GoTo 8 STICK No gt GoTo 9 308 TRANSMISSION P 1899 PARK NEUTRAL SWITCH STUCK IN PARK OR IN GEAR Continued APPLICABILITY Ignition Off TRANSMISSION Inspect the Wiring and Connector relating to Park Neutral Position Switch AUTOMATIC Were any problems found 4 SPD
384. y per pertinent service information Is the Camshaft endplay within specs Yes Replace the Camshaft Position Sensor Perform Powertrain Verification Test VER 5A Repair or replace Camshaft Cylinder Head as necessary Perform Verification Test VER 5A 196 DRIVEABILITY P 1391 INTERMITTENT LOSS OF CMP OR CKP Continued ACTION APPLICABILITY Start Engine ENGINE 2 0L At PCM backprobe CMP Sensor Signal Circuit with Oscilloscope s voltage measure 2 4L 1 4 ment lead DOHC While observing the Oscilloscope pattern wiggle CMP Sensor Circuit from Sensor to PCM Were any signals missing when the wiggle test was conducted Yes Note where wiggling the Wires caused a missing CMP Sensor Signal Repair Camshaft and Crankshaft Wiring Harness as necessary Perform Powertrain Verification Test VER 5A No GoTo 28 Ignition Off ENGINE 2 0L At the CKP Sensor backprobe the CKP Sensor Signal Circuit with the Oscilloscope s 2 4L 1 4 voltage measurement lead DOHC Start the Engine and observe the CKP Sensor voltage pattern on the Oscilloscope Are any Crankshaft Position Sensor Signals missing Yes gt GoTo 29 No Test Complete Ignition Off ENGINE 2 0L Disconnect the CKP Sensor Connector 2 4L 1 4 Note Check connectors Clean repair as necessary DOHC Inspect all Terminals 15 any Terminal damaged pushed out or miswired Yes gt Repair Terminal s for damage pushout o
385. y proper operation 4 Road test the vehicle Use all accessories that may be related to this repair With the DRBII1 confirm that DTC s are present and that all components are functioning properly 6 If this test is being performed after a No Trouble Code test verify that the symptom is no longer present If the symptom is still present or any other symptom or DTC is present refer to the symptom list for further diagnostic testing procedures Check for any Technical Service Bulletins that may apply 7 If there no DTC s present all components are functioning properly repair is complete 317 VERIFICATION TESTS Verification Tests Continued VERIFICATION TEST VER 3A Charging System Verification Use this test to verify that the Charging System symptom has been repaired and that the vehicle can be returned to the customer Note If the Powertrain Control Module has been replaced and the correct VIN and mileage have not been programmed a DTC will be set in the ABS Airbag and the SKIM modules In addition if the vehicle is equipped with a Sentry Key Immobilizer Module SKIM Secret Key data must be updated to enable starting Refer to GENERAL INFORMATION section for programming information for the PCM SKIM and the Transponder ignition key 1 Inspect the vehicle to ensure that all components related to the repair are connected properly 2 With the DRBIII Clear 3 Perform generator out

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