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02-03 Honda Civic Si Service Manual

1. CMP SENSOR A CMPA A25 VTC 81 A30 IGPLS1 VTC OIL CONTROL SOLENOID VALVE 0 LR VTC B23 VTEC OIL PRESSURE SWITCH VTPSW B9 A28IGPLS3 VTEC SOLENOID VALVE A27 IGPLS4 No 4 IGNITION COIL cont d 11 17 Fuel and Emissions Systems System Descriptions cont d ECM Electrical Connections FTP SENSOR GAUGE ASSEMBLY E31 MIL BKSW E22 BRAKE PEDAL POSITION SWITCH To MULTIPLEX CONTROL UNIT To IMMOBILIZER UNIT DATA LINK CONNECTOR E23 K LINE To EPS CONTROL UNIT TEST 26 CONNECTOR ECMA ECMB ECME 31 P 24 P 31 AEDEM ilz s 4 5 e 7 9 1 2 3 4 5 e 7 7 8 9 02 1516 18 912021 81912 7 VIL ern 2 2225124 2526 2728 29 30 mie azz 221231241 126 2 29031 TERMINAL LOCATIONS 11 18 ECM Inputs and Outputs at Connector A 31P 9 KS 11 501 ACV 19 MAP 20 21 vss VCC2 VCC1 NOTE Standard battery voltage is 12 V Wire side of female terminals 28 29 30 Terminal Wire color Terminal name Description Signal number 1 BLK WHT AFSHTC AIRFUELRATIO Drives A F sensor heater With ignition switch ON II battery voltage A F SENSOR HEATER With fully warmed up engine
2. ECM CONNECTOR B 24P INJ3 INJ2 BLU INJ4 YEL INJ1 BRN RED Wire side of female terminals PROBLEM DTC WIRE CYLINDER _TERMINAL COLOR No 1 P0301 B5 BRN No 2 P0302 B4 RED No 3 P0303 B3 BLU No 4 P0304 B2 YEL Is there continuity YES Repair short in the wire between the ECM and the injector M NO Go to step 48 11 76 48 Connect injector 2P connector terminal No 2 to body ground with a jumper wire see table INJECTOR 2P CONNECTOR JA INJ JUMPER WIRE Wire side of female terminals PROBLEM DTC WIRE COLOR CYLINDER No 1 P0301 BRN No 2 P0302 RED No 3 P0303 BLU No 4 P0304 YEL 49 Check for continuity between body ground and ECM connector terminal see table ECM CONNECTOR B 24 INJ4 YEL INJ1 TEHDA 67 o nsns A zz Wire side of female terminals PROBLEM DTC ECM WIRE CYLINDER TERMINAL COLOR No 1 P0301 5 BRN No 2 P0302 B4 RED No 3 P0303 B3 BLU No 4 P0304 B2 YEL Is there continuity YES Replace the injector then recheck IM NO Repair open the wire between the ECM and the DTC P0325 Malfunction in Knock Sensor Circuit 1 Reset the ECM see page 11 4 2 Startthe engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then
3. BLU WHT _ CONNECTOR BLK RED BLK VEL eu CONNECTOR H__ WHT WHT RED UNDER DASH FUSE RELAY BOX BRAKE PEDAL POSITION SWITCH C310 WHT GRN WHT BLK des Brake pedal pressed closed Brake pedal released open 11 45 Fuel and Emissions Systems How to Set Readiness Codes Malfunction Indicator Lamp MIL Indication In relation to Readiness Codes The vehicle has certain readiness codes that are part of the on board diagnostics for the emissions systems If the vehicle s battery has been disconnected or gone dead if the DTCs have been cleared or if the ECM has been reset these codes are set to incomplete In some states part of the emission testing is to make sure these codes are set to complete If all of them are not set to complete the vehicle may fail the emission test or the test cannot be finished To check if the readiness codes are complete turn the ignition switch ON 11 but do not start the engine The MIL will come on for 15 20 seconds If it then goes off the readiness codes are complete If it blinks several times one or more readiness codes are not complete To set readiness codes from incomplete to complete do the procedure for the appropriate code 11 46 Catalytic Converter Monitor and Readiness Code NOTE Do notturn the ignition switch off during the procedure All readiness codes are cleared when the battery is d
4. vcc2 GRN YEL YEL BLU Wire side of female terminals Is there about 5 V YES Repair open in the wire between the ECM A10 and the TP sensor IM NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM lt 4 e DTC P1121 TP Sensor Signal Lower Than DTC P1122 TP Sensor Signal Higher Than Expected Expected 1 Turn the ignition switch ON II 1 Turn the ignition switch ON II 2 Check the throttle position with the scan tool 2 Check the throttle position with the scan tool Is 12 9 6 0 6 or higher indicated when the Is 12 9 0 6 V or less indicated when the throttle throttle is fully opened is fully closed YES Intermittent failure system is OK at this YES Intermittent failure system is OK at this time W time W NO Replace the TP sensor the TP sensor is not NO Replace the TP sensor the TP sensor is not available separately available separately 11 63 PGM FI System DTC Troubleshooting cont d DTC P0128 Cooling System Malfunction NOTE If the DTCs listed below are stored at the same time as DTC P0128 troubleshoot those DTCs first then recheck for P0128 P0107 P0108 P1128 P1129 Manifold absolute pressure MAP sensor P1106 P1107 P1108 Barometric pressure BARO sensor P1259 VTEC
5. PCV Valve Replacement EVAP System ees 11 170 DTC Troubleshooting 11 171 EVAP Two Way Valve Test 11 186 Fuel Tank Vapor Control Valve Test suu susan 11 187 Component Location Index EVAP Canister Replacement 11 189 Fuel Tank Vapor Control Valve Replacement 11 189 Fuel and Emissions Systems Special Tools Ref N Tool Number E Description Oty A973X 041 XXXXX Vacuum Pump Gauge 0 30 in Hg 1 07JAZ 001000B Vacuum Pressure Gauge 0 4 in Hg 1 07SAZ 001000A Backprobe Set 2 07VAJ 0040100 Fuel Pressure Gauge Adapter 1 07NAJ P07010A Pressure Gauge Adapter 1 07XAA 001010A Fuel Sender Wrench 1 07ZAJ S5AA200 Hose Oil Pressure 1 1 07406 0020201 Pressure Hose 1 9 2 07406 0070300 Low Pressure Gauge W Panel 1 3 07MAJ PY4011A A T Pressure Hose 2 210 mm 1 89 4 07MAJ PY40120 Pressure Hose Adapter 1 07406 004000 Fuel Pressure Gauge 1 07ZAJ S5A0100 Fuel Pressure Gauge Set 1 11 2 P General Troubleshooting Information Intermittent Failures 2 If the MIL stays on connect the Honda PGM Tester or an OBD li scan tool to the Data Link The term intermittent failure means a system may Connector DLC B located under the driver s side have had a failure but it checks OK now If the of the dashboard Malfunction Indicator Lamp MIL on the dash does not come on check for poor connec
6. cont d 11 19 Fuel and Emissions Systems System Descriptions cont d ECM Inputs and Outputs at Connector A 31P 1 2 9 AFSHTC IGP2 KS 10 1 12 2 SG 561 IACV VSS MAP VCC2 VCC1 2 28 24 A182 Lot IGPLS3 IGPLS2 IGPLS1 Wire side of female terminals NOTE Standard battery voltage is 12 V Terminal Wire color Terminal name Description Signal number 19 GRN RED MAP MANIFOLD Detects MAP sensor signal With ignition switch ON II about 3 V ABSOLUTE PRESSURE At idle about 1 0 V depending on engine speed SENSOR 20 YEL BLU VCC2 SENSOR VOLTAGE Provides sensor voltage With ignition switch ON II about 5 V With ignition switch OFF about 0 V 21 YEL RED VCC1 SENSOR VOLTAGE Provides sensor voltage With ignition switch ON tl about 5 V i With ignition switch OFF about 0 V 22 WHT AFSHTC AIR FUEL Detects A F sensor heater With ignition switch ON il battery voltage RATIO A F SENSOR voltage HEATER CONTROL SIDE 23 BRN YEL LG2 LOGIC GROUND Ground for the ECM circuit Less than 1 0 V at all times 24 BRN YEL LG1 LOGIC GROUND Ground for the ECM circuit Less than 1 0 V at all times 25 BLU WHT CMPA CAMSHAFT Detects CMP sensor A With engine running pulses POSITION SENSOR A signal 26 GRN CMP B CAMSHAFT Detects CMP sensor B TDC With engine running pulses POSITION CMP SENS
7. CIRCUIT BOARD lt VTEC VTC The i VTEC has a VTC Variable Valve Timing Control mechanism on the intake camshaft in addition to the usual VTEC This mechanism improves fuel efficiency and reduces exhaust emissions at all levels of engine speed vehicle speed and engine load The VTEC mechanism changes the valve lift and timing by using more than one cam profile The VTC changes the phase of the intake camshaft via oil pressure It changes the intake valve timing continuously HIGH LOW SPEED ENGINE LOAD Low LOW ENGINE SPEED HIGH Driving Condition VTC Control Description D Light load Base Position Cam angle is retarded to reduce the entry of exhaust gas into the intake port and to achieve stable fuel consumption during lean burn D Medium high load Advance Control Cam angle is advanced for EGR effect and to reduce this pumping loss The intake valve is closed quickly to help reduce the entry of air fuel mixture into the 7 intake port and improve the charging effect Advance Base Position Cam phase angle is controlled for optimum valve timing and maximum engine power High speed cont d 11 29 Fuel and Emissions Systems System Descriptions cont d VTC system The VTC system makes continuous intake valve timing changes based on operating conditions Intake valve timing is optimized to allow the engine to produce maximum power
8. A973X 041 XXXXX This is a two trip code Once cleared it cannot be reproduced in one trip Also certain specific driving and ambient conditions must occur before the ECM will complete the system checks Additional test drives may still not meet the specific conditions needed to reproduce the code Follow these troubleshooting procedures carefully to ensure the integrity of the system and to confirm the cause of the problem or code NOTE Fresh fuel has a higher volatility that creates greater pressure vacuum The optimum condition for testing is fresh fuel and there must be less than a full tank If possible to assist in leak detection add 1 gallon of fresh fuel to the tank as long as it will not fill the tank just before starting these procedures EVAP Canister Purge Valve Test 1 Disconnect the vacuum hose from the EVAP canister purge valve A and connect a vacuum pump to the hose 2 Turn the EVAP canister purge valve on with the Honda PGM Tester or connect ECM connector terminal B21 to body ground with a jumper wire ECM CONNECTOR B 24P Wire side of female terminals 3 Turn the ignition switch ON 1 4 Apply vacuum to the hose Does the valve hold vacuum YES Go to step 5 NO The EVAP canister purge valve is OK Go to step 10 e Turn the ignition switch OFF 6 Disconnect the EVAP canister purge valve 2P connector 7 Check for continuity between EVAP canister purge valve 2P
9. Cam angle is advanced to obtain the EGR effect and reduce the pumping loss The intake valve is closed quickly to reduce the entry of the air fuel mixture into the intake port and improve the charging effect Cam angle is reduced at idle to stabilize combustion and reduces engine speed If a malfunction occurs the VTC system control is disabled and the valve timing is fixed at the fully retarded position TDC MAXIMUM VTC ADVANCE 50 MAXIMUM VTC ADVANCE 50 EX 4 b SHORT OVERLAP LONG OVERLAP VTEC system The VTEC system changes the cam profile to correspond to engine speed It maximizes torque at low engine speed and output at high engine speed The low lift cam is used at low engine speeds and the high lift cam is used at high engine speeds LOW SPEED VALVE TIMING HIGH SPEED VALVE TIMING IN 11 30 P System Diagram From No 4 BLK YEL ACC 10A fuse INTAKE BRN VEL BLU WHT CAMSHAFT VARIOUS BLU WHT SENSORS BLK WHT ECM GRN YEL BLU BLK RETARD CHAMBER ADVANCE CHAMBER VTC ACTUATOR DRAIN VANE Oi Pume VTC OIL CONTROL SOLENOID VALVE HOUSING a VTEC OIL PRESSURE PISTON BRN SWITCH YEL EM 1 NES VTEC SOLENOID SPOOL VALVE VALVE ROCKER ARMS Camshaft Position CMP Sensor The
10. Update the ECM if it does not have the latest software or substitute known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM Disconnect the VTC oil control solenoid valve 2P connector Check for continuity between ECM connector terminals B1 and B23 and body ground individually ECM CONNECTOR B 24P BLU WHT 1121314151 6 7 8 9 10 13 15 1718 211 4231 VTC BLK WHT 9 Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM B1 B23 and the VTC oil control solenoid valve I NO Replace the VTC oil control solenoid valve see page 11 127 lt DTC P0011 VTC System Malfunction 1 Reset the ECM see page 11 4 2 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on Test drive at a steady speed between 20 40 mph 30 60 km h for 10 minutes Check for Temporary DTC P0011 with the scan tool Is Temporary DTC P0011 indicated YES Go to step 5 NO Intermittent failure system is OK at this time Check for poor connections or loose wires at the VTC oil control solenoid valve and at the ECM M Watch the low oil pressure light with the engine running Is the low oil pressure light on YES Check the oil pressure see page 8 4 8 NO Go
11. connector terminal No 2 and body ground IAC VALVE 3P CONNECTOR IGP YEL BLK Wire side of female terminals Is there battery voltage YES Go to step 7 NO Repair open in the wire between the IAC valve and the PGM FI main relay 1 88 7 Turn the ignition switch OFF 8 Check for continuity between body ground and IAC valve 3P connector terminal No 1 IAC VALVE CONNECTOR PG1 BLK Wire side of female terminals Is there continuity YES Go to step 9 NO Repair open in the wire between the IAC valve and G101 8 9 Disconnect ECM connector A 31P 10 Check for continuity between body ground and ECM connector terminal A12 ECM CONNECTOR A 31P 2 31415 6 7 9 1011112 1516 18 1912021 22 23 25 26 27 28 29 30 IACV BLK RED Q Wire side of female terminals ts there continuity YES Repair short in the wire between the IAC valve and the ECM A12 NO Go to step 11 cont di 11 131 Idle Control System DTC Troubleshooting cont d 11 Connect IAC valve connector terminal No 3 to 15 Measure voltage between body ground and ECM body ground with a jumper wire connector terminal A12 IAC VALVE CONNECTOR ECM CONNECTOR A 31 ee 4 ls e 7 7 12111516 8 aa 25 26 27 28 29 BLK RED A Wire side of female terminals Wire side of female terminals 12 Ch
12. 11 Relieve the fuel pressure see page 11 144 the under hood fuse relay box for at least 10 seconds after completing troubleshooting 12 Remove the fuel fill cap otherwise it may take up to 20 minutes for the fuel gauge to indicate the correct fuel level 13 Disconnect the quick connect fittings from the fuel pump 14 Using the special tool loosen the fuel tank unit locknut A Terminal side of male terminals 9 5 kgf m 69 Ibf ft 11 157 Fuel Supply System Low Fuel Indicator Test 1 Do the fuel gauge sending unit test see page 11 156 If the system is OK go to step 2 If the system has any malfunction repair it 2 Turn the ignition switch OFF Remove the No 9 BACK UP 10A fuse from the under hood fuse relay box for at least 30 seconds then reinstall it 3 Turn the ignition switch ON II with the float at the E EMPTY position If the low fuel indicator is on go to step 4 If the low fuel indicator is not on refer to the low fuel indicator Circuit Diagram see page 22 58 and check the circuit 4 Turn the ignition switch OFF Remove the No 9 BACK UP 10A fuse from the under hood fuse relay box for at least 30 seconds then reinstall it 5 Liftthe float above the LOW position If the low fuel indicator goes off the system is OK If the low fuel indicator is still on refer to the low x fuel indicator Circuit Diagram see page 22 58 and c
13. DTC P0118 ECT Sensor Circuit High Voltage 1 Turn the ignition switch ON Il 2 Check the ECT with the scan tool Is 20 4 F or less or L Limit in Honda mode of PGM Tester or 5 V indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the ECT sensor and at the 3 Turn the ignition switch OFF 4 Disconnect the ECT sensor 2P connector 5 Connect the ECT sensor 2P connector terminals No 1 and No 2 with a jumper wire ECT SENSOR 2P CONNECTOR ECT 562 RED WHT GRN YEL JUMPER WIRE Wire side of female terminals 6 Turn the ignition switch ON 11 Ts 11 12 P Check the ECT with the scan tool Is 20 C 4 F or less or L Limit in Honda mode of PGM Tester or 5 V indicated YES Go to step 8 the ECT sensor W Turn the ignition switch OFF Remove the jumper wire Connect ECM connector terminals A10 and B8 with a jumper wire ECM CONNECTORS A 31P B 24 P 23 4 27 8 25130 562 GRN YEL ECT RED WHT JUMPER WIRE Wire side of female terminals Turn the ignition switch ON Il Check the ECT with the scan tool 15 20 C 4 F or less or L Limit in Honda mode of PGM Tester or 5 V indicated YES Update the ECM if it does not have the latest software or substitute a known goo
14. ECM CONNECTOR A 31P 11112 02 2324 2526 IGPLS1 YEL GRN IGPLS2 BLU RED IGPLS4 BRN IGPLS3 WHT BLU Wire side of female terminals 28 Check for continuity between body ground and ECM connector terminal see table ECM CONNECTOR 31 IGPLS1 YEL GRN IGPLS2 BLU RED IGPLS3 WHT BLU Wire side of female terminals PROBLEM DTC ECM WIRE CYLINDER TERMINAL COLOR No 1 P0301 A30 YEL GRN No 2 P0302 29 BLU RED No 3 P0303 A28 WHT BLU No 4 P0304 A27 BRN Is there continuity YES Repair short in the wire between the ECM and the ignition coil to step 27 27 Connect ignition coil 3P connector terminal No 1 to body ground with a jumper wire see table IGNITION COIL 3P CONNECTOR JUMPER WIRE Wire side of female terminals PROBLEM DTC WIRE COLOR CYLINDER No 1 P0301 YEL GRN No 2 P0302 BLU RED No 3 P0303 WHT BLU No 4 P0304 BRN 11 74 PROBLEM DTC ECM WIRE CYLINDER TERMINAL COLOR No 1 P0301 A30 YEL GRN No 2 P0302 29 BLU RED No 3 P0303 A28 WHT BLU No 4 P0304 A27 BRN Is there continuity YES Go to step 29 NO Repair open in the wire between the ECM and the ignition coil 29 Check the engine compression Is the compression YES Update the ECM if i
15. NOTE The operating values listed are approximate and may vary depending on the environment and the individual vehicle Unless noted otherwise at idle speed means idling with the engine completely warmed up in the neutral position and the A C and all accessories turned off Data Description Operating Value Freeze Data Diagnostic If the ECM detects a problem it will store it as a code If no problem is YES Trouble Code consisting of one letter and four numbers Depending on detected there is no DTC the problem an SAE defined code POxxx or a Honda output D defined code P1xxx will be output to the tester Engine Speed The ECM computes engine speed from the signals sent Nearly the same as YES from the crankshaft position CKP sensor This data is tachometer indication used for determining the time and amount of injected fuel At idle speed L 750 50 rpm Vehicle Speed The ECM converts pulse signals from the vehicle speed Nearly the same as YES sensor VSS speedometer indication Manifold The absolute pressure caused in the intake manifold by With engine stopped YES Absolute engine load and speed Nearly the same as Pressure atmospheric pressure MAP At idle speed about i 20 41 kPa 150 310 mmHg 6 12 0 7 1 3 V Engine The ECT sensor converts coolant temperature into voltage With cold engine YES Coolant and signals the ECM The se
16. PGM FI System DTC Troubleshooting cont d 10 Check for continuity between the secondary HO2S Sensor 2 4P connector terminal No 2 and body ground SECONDARY HO2S SENSOR 2 4P CONNECTOR SHO2S WHT RED Terminal side of male terminals Is there continuity YES Repair short in the wire between the ECM 2 and the secondary HO2S Sensor 2 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 66 DTC P0138 Secondary HO2S Sensor 2 Circuit High Voltage 1 Reset the ECM see page 11 4 2 Startthe engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 3 Check the secondary HO2S Sensor 2 output voltage at 3 000 rpm with the scan tool Is there 1 0 V or more YES Go to step 4 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the secondary HO2S Sensor 2 and at the ECM 4 Turn the ignition switch OFF 5 Disconnect the secondary HO2S Sensor 2 4P connector 6 Connect secondary HO2S Sensor 2 4P connector terminals No 1 and No 2 with a jumper wire SECONDARY HO2S SENSOR 2 4P CONNECTOR JUMPER WIRE SG3 PNK SHO2S WHT RED Terminal side of male ter
17. PGM FI main relay 2 ECM connector A 31P Injectors Idle air control IAC valve Camshaft Position CMP sensor B Top dead center TDC sensor Crankshaft position CKP sensor lt 21 Check for continuity between PGM FI main relay 1 4P connector terminal No 1 and body ground PGM FI MAIN RELAY 1 4P CONNECTOR r IGP1 1 YEL BLK Wire side of female terminals Is there continuity YES Repair short in the wire between the PGM FI main relay 1 and each item Also replace the No 6 ECU 15A fuse NO Replace the PGM FI main relay 1 Also replace the No 6 ECU 15A fuse 22 Inspect the No 17 FUEL PUMP 15A fuse in the under dash fuse relay box Is the fuse OK YES Go to step 34 NO to step 23 23 Remove the blown No 17 FUEL PUMP 15 fuse from the under dash fuse relay box 24 Disconnect ECM connector E 31P cont d 11 99 PGM FI System MIL Circuit Troubleshooting cont d 25 Check for continuity between ECM connector terminal E9 and body ground ECM CONNECTOR E 31P 161 YEL BLK us 8 9 Da 20 21 129 30 1 Wire side of female terminals Is there continuity YES Go to step 26 NO Replace the No 17 FUEL PUMP 15 A fuse and update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indi
18. YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 if the symptom indication goes away with a known good ECM repiace the original NO Replace the original knock sensor and or starter subharness 11 77 PGM FI System DTC Troubleshooting cont d DTC P0335 CKP Sensor No Signal DTC P0336 CKP Sensor Intermittent Interruption 1 Reset the ECM see page 11 4 2 Startthe engine 15 DTC P0335 and or P0336 indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the CKP sensor and at the ECM IN 3 Turn the ignition switch OFF 4 Disconnect the CKP sensor 3P connector 5 Turn the ignition switch ON 11 6 Measure voltage between CKP sensor 3P connector terminal No 3 and body ground CKP SENSOR 3P CONNECTOR Wire side of female terminals Is there battery voltage YES Go to step 7 NO Repair open in the wire between PGM FI main relay 1 and the CKP sensor W 11 78 7 Measure voltage between CKP sensor 3P connector terminal No 1 and body ground CKP SENSOR 3P CONNECTOR D Wire side of female terminais Is there about 5 V YES Go to step 8 NO Go to step 10 Measure voltage between CKP sensor 3P connector terminals No 2 and No 3 CKP SENSOR 3P CONNECTOR IGP YEL BLK 61 BRN YEL
19. 0 V A F SENSOR HEATER heater relay CONTROL RELAY 9 YEL BLK 161 IGNITION SIGNAL Detects ignition signal With ignition switch ON 11 battery voltage With ignition switch OFF about 0 V 14 LT GRN FTP FUEL TANK Detects FTP sensor signal With ignition switch ON Il and fuel fill cap open PRESSURE FTP SENSOR A about 2 5 V 15 GRN RED ELD ELECTRICAL LOAD Detects ELD signal With ignition switch ON II about 0 1 V 4 8 V DETECTOR z depending on electrical load 16 LT GRN BLK EPSLD ELECTRICAL Detects Power steering load At idle with steering wheel in straight ahead POWER STEERING LOAD signal position about 0 V DETECT At idle with steering wheel at full lock momentary battery voltage 18 RED CLUTCH RELAY Drives A C clutch relay With compressor ON about 0 V With compressor OFF battery voltage 11 22 w ECM Inputs and Outputs at Connector E 31P NOTE Standard battery voltage is 12 V Wire side of female terminals Terminal Wire color Terminal name Description Signal number 20 BLU RED 2WBS EVAPORATIVE Drives EVAP bypass With ignition switch ON il battery voltage EMISSION EVAP BYPASS solenoid valve SOLENOID VALVE 21 LT GRN RED VSV EVAPORATIVE Drives EVAP canister vent With ignition switch ON 11 battery voltage EMISSION shut valve CANISTER VENT SHUT L VALVE 22 WHT BLK BKSW BRAKE
20. 1 Check the attachment state of the A F sensor Sensor 1 Is it slacked from the exhaust pipe YES Reinstall the A F sensor Seneor 1 see page 11 113 NO to step 2 2 Reset the ECM see page 11 4 3 Start the engine Hold the engine speed at 3 000rpm with no load in neutral until the radiator fan comes on then let it idle for 2 minute Is DTC PO134 indicated YES Replace the A F sensor Seneor 1 see page 11 113 NO Intermittent failure sistem is OK at this time Check for poor connections or loose terminals at the A F sensor Seneor 1 and the 1 Reset the ECM see page 11 4 2 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 3 Check the secondary 25 Sensor 2 output voltage at 3 000 rpm with the scan tool Is there 0 3 V or less YES Go to step 4 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the secondary HO2S Sensor 2 and at the ECM ll 4 Turn the ignition switch OFF 5 Disconnect the secondary HO2S Sensor 2 connector 6 Turn the ignition switch ON Il 7 Check the secondary HO2S Sensor 2 output voltage with the scan tool Is there 0 3 V or less YES Go to step 8 NO Replace the secondary HO2S Sensor 2 m 8 Turn the ignition switch OFF 9 Disconnect ECM connector E 31P icont d 11 65
21. NOTE Erasing DTCs with the Honda PGM Tester does not require you to do the idle learn procedure Remove the No 6 ECU 15A fuse from the under hood fuse relay box Remove the No 19 battery 80A fuse from the under hood fuse relay box Remove PGM FI main relay 1 Remove any of the wires from the under hood fuse relay box Disconnect any of the connectors from the under hood fuse relay box Disconnect the connector between the engine compartment wire harness and ECM wire harness Disconnect the G2 terminal from the transmission housing Disconnect the G1 terminal from the body o Disconnect the G101 terminal from the cylinder head cover Procedure To complete the idle learn procedure do this 1 Make sure all electrical items A C audio rear defogger lights etc are off 2 Start the engine and hold it at 3 000 rpm with no load in neutral until the radiator fan comes on or until the engine coolant temperature reaches 194 F 90 3 Let the engine idle for about 5 minutes with the throttle fully closed NOTE If the radiator fan comes on do not include its running time in the 5 minutes gt E 11 139 Fuel Supply System Component Location Index FUEL PUMP Test page 11 141 col Um Replacement page 11 153 FUEL FILTER Replacement page 11 152 FUEL GAUGE SENDING UNIT Test page 11 156 Replacement page 11 153 FUEL PRESSUR REGULATOR Replacement p
22. Repair open in the wire between the ECM A21 and the MAP sensor ll NO Update the if it does not have the latest Software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original Check the MAP with the scan tool Is 2 kPa 15 mmHg 0 6 in Hg or less or 0 V indicated YES Go to step 9 NO Replace the MAP sensor Turn the ignition switch OFF Disconnect ECM connector A 31P Check for continuity between MAP sensor connector terminal No 2 and body ground MAP SENSOR 3P CONNECTOR Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM A19 and the MAP sensor NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM M DTC P0108 MAP Sensor Circuit High Voltage 1 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle 2 Check the MAP with the scan tool Is about 101 kPa 780 mmHg 30 in Hg or higher or about 2 9 V or higher indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the MAP sensor and at the 3 Turn the ign
23. 1 to body ground with a jumper wire SENSOR SENSOR 1 CONNECTOR AFS BLU JUMPER WIRE Wire side of female terminals x lt 8 Check for continuity between ECM connector DTC P1158 A F Sensor Sensor 1 AFS terminals A6 and body ground Terminal Low Voltage ECM CONNECTOR A 31P 1 Reset the ECM see page 11 4 AFS RED 2 Start the engine Is DTC P1158 indicated YES to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the A F sensor Sensor 1 and at the Wire side of female terminals 3 Turn the ignition switch OFF Is there continuity 4 Disconnect the A F sensor Sensor 1 4P connector and ECM connector A 31P YES Repair open in the wire between the A F sensor Sensor 1 and the A16 5 Check for continuity between ECM connector terminal A16 and body ground NO open in the wire between the A F sensor Sensor 1 and the ECM A6 ECM CONNECTOR A 31P 9 Substitute a known good A F sensor Sensor 1 and recheck Is DTC P1157 indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 if the symptom indication goes away with a known good ECM replace the original Wire side of female terminals NO Replace the A F sensor Sensor 1 Is there contin
24. 10 METER 7 5A DNo 14 A C CLUTCH RELAY 10A 2 B LAF A F HEATER 20A IMOFPR gt MALY E7 cont d 11 15 Fuel and Emissions Systems System Descriptions cont d ECM Electrical Connections SS No 1 INJECTOR No 2 INJECTOR pu 1 No 3 INJECTOR oU No 4 INJECTOR a CMP SENSOR B TDC SENSOR CKP SENSOR 11 16 B51NJ1 BA INJ2 B31NJ3 B21NJ4 A121ACV BARO SENSOR Built into the ECM CMPB 7 26 TDC 7 0 9 RVS B7 9 anion MAP SENSOR VCC1 A21 gt ee 0 TP SENSOR VCC2 A20 9 uem c uod Rc 005 IAT SENSOR I ECT SENSOR EET Y Med KS 77 REVERSE LOCK SOLENOID VALVE e 8 vss a5 ri ae RI 18 VSS AFSHTCR 2 0 A F SENSOR RELAY m AFSHTC 22 EVAP CANISTER AFSHTC A1 PURGE VALVE b E asqa WO Do AFS A16 Lr i B21PCS um F ss AFS UN CANISTER l VENT SHUT VALVE rii ona AD E21 VSV EVAP BYPASS SHO2S E2 SOLENOIDVALVE ff BU y f 97 0 CO enmia oe 5 E20 2WBS SHO2SHTC E8 SECONDARY H02S ALT N SENSOR 2 5 B10 ALTL LG1 A24 I T T 9 B13 ALTF
25. 16 17 Is there continuity YES Go to step 16 NO Replace the EVAP two way bypass solenoid valve A 8 Disconnect ECM connector E 31P Check for continuity between EVAP bypass solenoid valve 2P connector terminal No 2 and body ground EVAP BYPASS SOLENOID VALVE 2P CONNECTOR 2WBS BLU RED Wire side of female terminals Is there continuity YES Repair the short in the wire between the EVAP bypass solenoid valve and the ECM E20 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 182 EVAP Canister Vent Shut Valve Test 18 19 20 21 22 23 Disconnect the vacuum hose from the EVAP canister vent filter A and connect a vacuum pump to the hose Turn the EVAP canister vent shut valve on with the Honda PGM Tester or connect ECM connector terminal E21 to body ground with a jumper wire ECM CONNECTOR E 31P 11213 4 5 6 7 8191 8 Ww VT nens t C DA JUMPER WIRE Wire side of female terminals Turn the ignition switch ON II Apply vacuum to the hose Does the valve hold vacuum YES The EVAP canister vent shut valve is OK Go to step 27 NO Go to step 22 Turn the ignition switch OFF Disconnect the EVAP canister vent shut valve 2P
26. 5 seconds After about 3 5 miles 2 2 km the readiness code should switch from incomplete to complete 4 If the readiness code is still set to incomplete check for a temporary DTC If there is no DTC the enable criteria was probably not met repeat the procedure Air Fuel Ratio A F Sensor Heater Monitor Readiness Code NOTE All readiness codes are cleared when the battery is disconnected or when the ECM is cleared with the OBD II scan tool or Honda PGM Tester Procedure 1 Connect the scan tool to the vehicle s data link connector DLC and bring up the tool s generic OBD II mode 2 Start the engine and let it idle for 1 minute The readiness code should switch from incomplete to complete 3 If the readiness code is still set to incomplete check for a temporary DTC If there is no DTC repeat the procedure cont d 11 47 Fuel and Emissions Systems How to Set Readiness Codes cont d Misfire Monitor and Readiness Code This readiness code is always set to available because misfiring is continuously monitored Monitoring pauses and the misfire counter resets if the vehicle is driven over a rough road Monitoring also pauses and the misfire counter holds at its current value if the throttle position changes more than a predetermined value or if driving conditions fall outside the range of any related enable criteria Fuel System Monitor and Readiness Code This readiness code is always s
27. BLK BLK ORN onn EVAP BYPASS SOLENOID VALVE EPSLD ToEPS dom GRN BLK CONTROL UNIT 16 MIL eee C453 BLU WHT YEL MIE GRN ORN GAUGE ASSEMBLY cont d 11 43 Fuel and Emissions Systems System Descriptions cont d ECM Circuit Diagram cont d m _ RED WHT WEI puc E scs So K LINE 23 LT BLU CONNECTOR HT WHT RED CONNECTOR WHT BLK nk WHT GRN xw WHT RED BLK YEL F E RED C451 Ci ener GRN WHT BLK ORN GRN RED BK BLK ORN o S 11 44 DATALINK CONNECTOR UNDER HOOD FUSE RELAY BOX 1 CLUTCI RELAY VER RADIATOR FAN RELAY J BATTERY e m A x MULTIPLEX BK c CONTROL UNT ORN ORN ORN CONNECTORS IGNITION SWITCH TEST TACHOMETER CONNECTOR UNDER HOOD FUSE RELAY BOX DNo 20 IG 40A Canada 50A No 14 OPTION 40A No 6 ECU ECM 15A No 9 BACK UP 10A No 7 HORN STOP 15A No 19 BATTERY 80A UNDER DASH FUSE RELAY BOX DNo 4 ACG 10 No 1 IGN COIL 15A No 2 A F HEATER 20A QONo 17 FUEL PUMP 15A No 10 METER 7 5 No 14 A C CLUTCH RELAY 10A BLK WHT CONNECTORD CONNECTOR E YEL BLK WHT BLK CONNECTOR K
28. Disconnect ECM connector E 31P 11 Check for continuity between body ground and ECM connector terminal E15 ECM CONNECTOR E 31 Dre sp eat EZ ELD GRN RED Wire side of female terminals Is there continuity YES Go to step 12 NO Repair open in the wire between the ECM E15 and the ELD cont d 11 93 PGM FI System DTC Troubleshooting cont d 12 13 14 15 Check for continuity between ELD 3P connector terminal No 2 and body ground ELD 3P CONNECTOR 11213 GND BLK Wire side of female terminals Is there continuity YES Go to step 13 NO Repair open in the wire between the ELD and G201 8 Reconnect the ELD 3P connector and ECM connector E 31P Start the engine and let it idle While measuring voltage between ECM connector terminals A24 and E15 turn the headlights on high ECM CONNECTORS 31P la z s 4 s e 7 71 15 62 18 1920 21 222324 12526 2128 29 30 LG1 BRN YEL ELD GRN RED Wire side of female terminals Does the voltage drop YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original l Replace the ELD I 11 94 DTC P1361 Camsha
29. PGM FI System DTC Troubleshooting cont d DTC P0500 VSS Circuit Malfunction 1 Test drive the vehicle 2 Check the vehicle speed with the scan tool Is the correct speed indicated YES intermittent failure system is OK at this time Check for poor connections or loose terminals at the VSS and at the ECM E NO Go to step 3 3 Turn the ignition switch OFF 4 Block the rear wheels and set the parking brake 5 Raise the front of the vehicle and make sure it is securely supported 6 Turn the ignition switch ON 11 7 Block the right front wheel and slowly rotate the left front wheel 8 Measure voltage between ECM connector terminals A18 and A24 ECM CONNECTOR A 31P 1T2 8 4 5 6 101112 1516 G BRN YEL WHT GRN Wire side of female terminals Does the voltage pulse between 0 V and 5 V or between OV and battery voltage YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Go to step 9 11 80 Turn the ignition switch OFF Disconnect ECM connector A 31P Turn the ignition switch ON Il Block the right front wheel and slowly rotate the left front wheel Measure voltage between ECM connector terminals A18 and A24 ECM CONNECTOR A 31P vss BRN
30. SENSOR SENSOR 1 4P CONNECTOR Wire side of female terminals 11 90 13 14 15 Is there continuity YES Repair short in the wire between the A F sensor relay A F sensor Sensor 1 and ECM A22 m NO Go to step 13 Turn the ignition switch ON II Measure voltage between ECM connector terminals E8 and A24 ECM CONNECTORS 31 31 LG1 BRN YEL Wire side of female terminals Is there battery voltage YES Repair open in the wire between the ECM A22 and the A F sensor Sensor 1 W NO Go to step 15 Check for continuity in the wires between the A F sensor and the fuses Is there continuity YES The wires are OK Replace the A F sensor relay NO Repair open in the wire between the A F sensor relay and the fuses DTC P1167 A F Sensor Sensor 1 Heater 6 Check for continuity between ECM connector Circuit Malfunction terminals A6 and A16 NOTE If DTC P1162 is stored at the same time as DTC ECM CONNECTOR A 31P P1167 troubleshoot DTC P1162 first then troubleshoot DTC P1167 AFS RED 1 2 3 4 5 6 7 771516 1 Reset the ECM see page 11 4 2 Start the engine Wait for at least 80 seconds 5 RED YEL Is DT C P01167 indicated YES Go to step 3 Wire side of female terminals NO intermittent failure system is OK at this time Che
31. Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original Brake Pedal Position Switch Signal Circuit Troubleshooting 1 Check the brake lights 4 Inspect the No 7 HORN STOP 15 fuse in the under hood fuse relay box Are the brake lights on without pressing the brake pedal Is the fuse YES Inspect the brake pedal position switch YES Repair open in the wire between the brake see page 19 6 8 pedal position switch and the No 7 HORN STOP 15A fuse Inspect the brake pedal position switch NO to step 2 see page 19 10 8 2 Press the brake pedal NO short in the wire between the ECM E22 and the No 7 HORN STOP 15 fuse Do the brake lights come on Replace the No 7 HORN STOP 15A fuse YES Go to step 3 NO Go to step 4 3 Measure voltage between ECM connector terminals A24 and E22 with the brake pedal pressed ECM CONNECTORS A 31P WHT BLK Wire side of female terminals Is there battery voltage YES The brake pedal position switch signal is OK m NO Repair open in the wire between the ECM E22 and the brake pedal position switch 11 137 Idie Control System Idle Speed Inspection NOTE Leave the idle air control IAC valve connected Before
32. YES Replace the PGM FI main relay 2 NO Repair open in the wire between the PGM FI main relay 2 and the fuel pump 5P connector 24 Turn the ignition switch OFF Fuel Supply System Fuel Pressure Relieving Before disconnecting fuel lines or hoses relieve pressure from the system by disconnecting the fuel tube quick connect fitting in the engine compartment 1 Turn the ignition switch OFF 2 Remove the PGM FI main relay 2 A 3 Start the engine and let it idle until it is stalls NOTE The DTCs or Temporary DTCs P0301 P0302 P0303 P0304 may come on during this procedure If any DTCs are stored ignore them 4 Turn the ignition switch OFF 5 Remove the fuel fill cap and relieve fuel pressure in the fuel tank 6 Remove the engine cover 7 Disconnect the negative cable from the battery 8 Check the fuel quick connect fitting for dirt and clean it if necessary 11 144 9 Place a rag or shop towel over the quick connect fitting A 10 Disconnect the quick connect fitting A Hold the connector B with one hand and squeeze the retainer tabs C with the other hand to release them from the locking pawls D Pull the connector off NOTE Prevent the remaining fuel in the fuel feed line or hose from flowing out with a rag or shop towel Be careful not to damage the line E or other parts Do not use tools If the connector does not move keep the retainer tabs pr
33. blower fan rear defogger radiator fan and air conditioner off Is the engine running at 750 50 rpm YES Intermittent failure system is OK at this time NO the idle speed is less than 700 rpm go to step 3 if it s 800 rpm or higher go to step 4 3 Disconnect the idle air control IAC valve 3P connector Does the engine speed increase or fluctuate YES Check the idle speed see page 11 138 If the idle will not adjust properly clean the passage in the throttle body and then adjust the idle I NO Replace the IAC valve 4 Turn the ignition switch OFF 5 Remove the intake air duct from the throttle body 6 Startthe engine and let it idle 11 130 7 Put your fingers on the lower port A in the throttle body Does the engine stall YES Check the idle speed see page 11 138 If it s out of specification replace the IAC valve NO With the throttle valve completely closed check for vacuum leaks and repair as necessary W DTC P1519 IAC Valve Circuit Malfunction 1 Reset the ECM see page 11 4 2 Turn the ignition switch ON Il Is DTC P1519 indicated YES Go to step 3 NO intermittent failure system is OK at this time Check for poor connections or loose terminals at the IAC valve and at the ECM E 3 Turn the ignition switch OFF 4 Disconnect the IAC valve 3P connector 5 Turn the ignition switch ON Il 6 Measure voltage between IAC valve
34. one or more readiness codes are not set to complete To set each code drive the vehicle or run the engine as described in the procedures to set them in this section see page 11 46 Manifold Absolute Pressure MAP Sensor The MAP sensor converts manifold absolute pressure into electrical signals to the ECM SENSOR UNIT TERMINAL cont d 11 27 Fuel and Emissions Systems System Descriptions cont d Secondary Heated Oxygen Sensor Secondary HO2S The secondary HO2S detects the oxygen content in the exhaust gas downstream of the three way catalytic converter TWC and sends signals to the ECM which checks the efficiency of the TWC To stabilize its output the sensor has an internal heater The secondary HO2S is installed in the TWC SENSOR TERMINALS ZIRCONIA ELEMENT HEATER HEATER TERMINALS Starting Control When the engine is started the ECM provides a rich mixture by increasing injector duration Throttle Position TP Sensor The TP sensor is a potentiometer connected to the throttle valve shaft As the throttle position changes the sensor varies the signal voltage to the ECM The TP sensor is not replaceable apart from the throttle body ELEMENT BRUSH HOLDER Vehicle Speed Sensor VSS The VSS is driven by the differential It generates a pulsed signal from an input of 5 volts The number of pulses per minute increases decreases with the speed ofthe vehicle TERMINALS BEARING GEAR
35. sensor B sensor and G101 8 9 Substitute a known good CMP sensor sensor and recheck Is DTC P1361 and or P1362 indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM m NO Replace the original CMP sensor B TDC sensor 11 95 PGM FI System DTC Troubleshooting cont d 10 Measure voltage between ECM connector terminal 11 12 13 A26 and body ground ECM CONNECTOR A 31P TDC GRN Wire side of female terminals Is there about 5 V YES Repair open in the wire between the ECM A26 CMP sensor TDC sensor M NO Go to step 11 Turn the ignition switch OFF Disconnect ECM connector A 31P Check for continuity between ECM connector terminal A26 and body ground ECM CONNECTOR A 31P TDC GRN Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM A26 and the CMP sensor B TDC sensor NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 96 P1607 Malfunction Internal Circuit 1 Reset
36. software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 82 18 Remove the glove box see page 20 63 19 Remove the PGM FI main relay 1 A 20 Measure voltage between body ground and ECM connector terminals A3 and A2 individually ECM CONNECTOR 31P 1 YEL BLK IGP2 YEL BLK Sa 1 2 3 4 5 6 7 73 EA 16 718 19 20 21 222324 z7 28 2830 7 Wire side of female terminals Is there battery voltage YES Repair short to power in the wire between the ECM A2 A3 and the PGM FI main relay 1 8 NO Replace the PGM FI main relay 1 V lt gt DTC P1106 BARO Sensor Range Perfomance Problem DTC P1107 BARO Sensor Circuit Low Voltage DTC P1108 BARO Sensor Circuit High 1 Reset the ECM see page 11 4 Voltage 2 Start the engine Hold the engine at 3 000 rpm with 1 Reset the ECM see page 11 4 no load in neutral until the radiator fan comes on then let it idle 2 Turn the ignition switch ON II 3 Test drive with the transmission in 4th gear Is P1107 or P1108 indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the 4 Accelerate for 5 seconds using wide open throt
37. 4P CONNECTOR ALTF WHT RED JUMPER WIRE Wire side of female terminals 12 Check for continuity between body ground and ECM connector terminal B13 ECM CONNECTOR B 24P ALTF WHT RED Wire side of female terminals Is there continuity YES Test the alternator see page 4 22 NO Repair open in the wire between the ECM B13 and the alternator I 13 Turn the ignition switch OFF 14 Disconnect ECM connector B 24P P e Electrical Power Steering EPS Signal Circuit Troubleshooting 15 Check for continuity between body ground and 1 Turn the ignition switch ON 11 ECM connector terminal B13 2 Measure voltage between ECM connector ECM CONNECTOR B 24P terminals A24 and E16 ALTF WHT RED ECM CONNECTORS 31P LG1 BRN YEL 31 Wire side of female terminals EPSLD LT GRN BLK Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM B13 and the alternator I Is there battery voltage NO Update the ECM if it does not have the latest YES Go to step 6 software or substitute a known good ECM then recheck see page 11 6 If the symptom indication NO Go to step 3 goes away with a known good ECM replace the original ECM E 3 Start the engine 4 Turn the steering wheel to the full lock position 5 Measure voltage between ECM connector terminals A24 a
38. A F Sensor The A F Sensor operates over a wide air fuel range The A F Sensor is installed upstream of the TWC and sends signals to the ECM which varies the duration of fuel injection accordingly SENSOR TERMINALS ZIRCONIA ELEMENT tas HEATER HEATER TERMINALS Barometric Pressure BARO Sensor The BARO sensor is inside the ECM It converts atmospheric pressure into a voltage signal that the ECM uses to modify the basic duration of the fuel injection discharge 11 26 Camshaft Position CMP Sensor Top Dead Center TDC Sensor The CMP sensor B TDC sensor detects the position of the No 1 cylinder as a reference for sequential fuel injection to each cylinder MAGNET Crankshaft Position CKP Sensor The CKP sensor detects crankshaft speed and determines ignition timing and timing for fuel injection of each cylinder as well as detecting engine misfire t MAGNET TERMINAL Engine Coolant Temperature ECT Sensor The ECT sensor is a temperature dependent resistor thermistor The resistance of the thermistor decreases as the engine coolant temperature increases TERMINAL O RING THERMISTOR Ignition Timing Control The ECM contains the memory for basic ignition timing at various engine speeds and manifold absolute pressure It also adjusts the timing according to engine coolant temperature Injector Timing and Duration The ECM contains the memory for basic discharg
39. Heater Circuit Malfunction P0171 45 P0171 Fuel System Too Lean see page 11 70 P0172 45 P0172 Fuel System Too Rich see page 11 70 P0300 and any P0300 and any Random Misfire see page 11 71 of of P0301 71 P0301 P0302 72 P0302 P0303 73 P0303 P0304 74 ___ P0304 P0301 71 1 P0301 _ Vo 1 Cylinder Misfire see page 11 72 P0302 72 P0302 No 2 Cylinder Misfire see page 11 72 P0303 73 P0303 __ No 3 Cylinder Misfire see page 11 72 P0304 74 P0304 No 4 Cylinder Misfire see page 11 72 These DTCs are indicated by a blinking malfunction indicator lamp MIL when the SCS service signal line is jumped with the Honda PGM Tester cont d 11 7 Fuel and Emissions Systems DTC Troubleshooting Index cont d DTC Temporary DTC Detection Item Note MIL indication P0325b 23 Knock Sensor Circuit Malfunction see page 11 77 e P0335 4 Crankshaft Position CKP Sensor No Signal see page 11 78 P0336 4 Crankshaft Position CKP Sensor Intermittent see page 11 78 EN interruption P0340 57 Camshaft Position CMP Sensor A No Signal see page 11 121 P0344 57 eee Camshaft Position CMP Sensor A Intermittent see page 11 121 Interruption EM P0341 57 Variable Valve Timing Control VTC Phase Gap see pag
40. LT BLU K LINE DATA LINK CONNECTOR DLC _ LT BLU erate Terminal side of female terminals 11 110 10 11 12 13 Is there continuity YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repair open in the wire between DLC terminal No 7 and the ECM E23 After repairing the wire check the DTC with the OBD II scan tool Honda PGM Tester and go to the DTC Troubleshooting index W Turn the ignition switch OFF Disconnect ECM connector E 31P Make sure the OBD II scan tool or Honda PGM Tester is disconnected from the DLC Turn the ignition switch ON 11 Measure voltage between DLC terminals No 5 and No 7 DATA LINK CONNECTOR DLC K LINE LG BRN YEL LT BLU Terminal side of female terminals Isthere 0 V YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repair short to power in the wire between the DLC terminal No 7 and the ECM E23 After repairing the wire check the DTC with the OBD II scan tool Honda PGM Tester and go to the DTC Troubleshooting index 1 Injector Replacement 1 Relieve fuel pressur
41. PEDAL Detects brake pedal With brake pedal released about 0 V POSITION SWITCH position switch signal With brake pedal pressed battery voltage 23 LT BLU K LINE Sends and receives scan With ignition switch ON 11 pulses or battery tool signals voltage 24 YEL SEFMJ Communicates with With ignition switch ON 11 about 5 V multiplex control unit With engine running under load pulses 26 BLU NEP ENGINE SPEED Outputs engine speed pulse With engine running pulses j PULSE 27 RED BLU IMOCD IMMOBILIZER Detects immobilizer signal j CODE 29 BRN i SCS SERVICE CHECK Detects service check signal With the service check signal shorted with the PGM SIGNAL Tester about 0 V With the service check signal opened about 5 V 30 RED WHT WEN WRITE ENABLE Detects write enable signal With ignition switch ON 11 about 0 V SIGNAL 31 GRN ORN MIL MALFUNCTION Drives MIL With MIL turned ON about 0 V INDICATOR LAMP With MIL turned OFF battery voltage 11 23 Fuel and Emissions Systems System Descriptions cont d Vacuum Hose Routing To EVAPORATIVE EMISSION CANISTER INTAKE AIR BYPASS CONTROL THERMAL VALVE FRONT OF VEHICLE EVAPORATIVE EMISSION CANISTER PURGE VALVE 11 24 Vacuum Hose Routing 5 ATMOSPHERE D AIR FUEL RATIO A F SENSOR SENSOR 1 SECONDARY HEATED OXYGEN SENSOR SECONDARY HO2S SENSO
42. Replace EVAPORATIVE EMISSION EVAP CANISTER PURGE VALVE TP SENSOR THROTTLE BODY GASKET Replace 1 VALVE 5 kgf m 2 5 Ibf ft 11 166 Catalytic Converter System lt e DTC Troubleshooting DTC P0420 Catalytic System Efficiency Below Threshold NOTE If some of the DTCs listed below are stored at the same time as DTC P0420 troubleshoot those DTCs first then recheck for DTC P0420 P0137 P0138 Secondary Heated Oxygen Sensor secondary HO2S Sensor 2 P0141 Secondary HO2S Sensor 2 heater 1 Reset the ECM see page 11 4 then continue to step 2 through 5 to reset the readiness code 2 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 3 Drive for about 10 minutes without stopping Your speed can vary 4 With the transmission in 4th gear drive at a steady speed between 50 62 mph 80 100 km h for 30 seconds close the throttle completely for 1 2 seconds If the engine is stopped during this part of the procedure repeat steps 3 4 and 5 y e 5 Repeat step 4 three times Between each repetition 6 Check for a Temporary DTC with the scan tool Does the scan too indicate Temporary DTC P0420 YES Check the TWC If necessary replace the TWC m NO Check for readiness code completion If the readiness is complete it was a intermittent failure and the system is OK at this time If the rea
43. YEL WHT GRN Wire side of female terminals Does the voltage pulse between 0 V and 5 V or between OV and battery voltage YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM m NO Check these items A short or an open in the wire between the ECM A18 and the VSS E If the wire is OK test the VSS see page 22 71 DTC P0563 ECM Power Source Circuit Unexpected Voltage 1 2 Reset the ECM see page 11 4 Turn the ignition switch OFF Wait 5 seconds Turn the ignition switch ON Ii Is DTC P0563 indicated YES Go to step 5 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the No 6 ECU ECM 15 A fuse in the under hood fuse relay box and at the 5 Turn the ignition switch OFF 6 Disconnect ECM connector E 31P 7 Turn the ignition switch ON Il e 8 Measure voltage between ECM connector terminal E7 and body ground ECM CONNECTOR E 31P MRLY RED YEL Wire side of female terminals Is there battery voltage YES Go to step 12 NO Go to step 9 9 Remove the glove box see page 20 63 10 Remove the PGM FI main relay 1 A 11 Check for continuity between ECM connector terminal E7 and body gr
44. canister and repeat step 4 11 188 w P EVAP Canister Replacement Fuel Tank Vapor Control Valve Replacement 1 Remove the vacuum hoses A 1 Remove the fuel tank see page 11 155 2 Remove the fuel tank vapor control valve A from the fuel tank B b 2 Remove the boit B 3 Remove the EVAP canister C 3 Install the fuel tank vapor control valve 4 Install in the reverse order of removal 4 Install the fuel tank see page 11 155 11 189
45. connector terminal No 2 and body ground EVAP CANISTER PURGE VALVE 2P CONNECTOR PCS YEL BLU Wire side of female terminais Is there continuity YES to step 8 NO Repair open in the wire between the EVAP canister purge valve and the ECM PCM B21 m 8 Turn the ignition switch ON Il 9 Measure voltage between EVAP canister purge valve 2P connector terminal No 1 and body ground EVAP CANISTER PURGE VALVE 2P CONNECTOR 161 BLK YEL Wire side of female terminals Is there battery voltage YES Replace the EVAP canister purge NO Repair open in the wire between the EVAP canister purge valve and the No 4 ACG 10A fuse W lt EVAP Bypass Solenoid Valve Test 10 Disconnect both vacuum hoses from the EVAP two way valve A and connect a vacuum pump to the canister port on the two way valve 11 Turn the ignition switch ON II 12 Apply vacuum to the hose Does the valve hold vacuum YES The EVAP two way bypass solenoid valve is OK Go to step 18 NO Go to step 13 13 Turn the ignition switch OFF 14 Disconnect the EVAP bypass solenoid valve 2P connector 15 Check for continuity between EVAP bypass solenoid valve 2P connector terminal No 2 and body ground EVAP BYPASS SOLENOID VALVE 2P CONNECTOR 2WBS BLU RED Wire side of female terminals cont d 11 181 EVAP System DTC Troubleshooting cont d
46. did not come on but there is a driveability problem refer to the Symptom Troubleshooting Index in this section If you can t duplicate the DTC Some of the troubleshooting in this section requires you to reset the ECM and try to duplicate the DTC If the problem is intermittent and you can t duplicate the code do not continue through the procedure To do so will only resuit in confusion and possibly a needlessly replaced ECM cont d 11 3 Fuel and Emissions Systems General Troubleshooting Information cont d How to Reset the ECM You can reset the ECM in either of two ways Use the OBD II scan tool or Honda PGM Tester to reset the ECM memory See the OBD II scan tool or Honda PGM Tester user s manuals for specific instructions Turn the ignition switch OFF and remove the No 6 ECU 15A fuse A from the under hood fuse relay box B for 10 seconds How to End a Troubleshooting Session required after any troubleshooting 1 Reset the ECM as described above 2 Do the ECM idle learn procedure see page 11 139 3 Turn the ignition switch OFF 4 Disconnect the OBD Il scan tool or Honda PGM Tester from the DLC NOTE The ECM is part of the immobilizer system If you replace the ECM it will have a different immobilizer code In order for the engine to start you must rewrite the immobilizer code with the Honda PGM Tester 11 4 How to Remove the ECM for Testing 1 Remo
47. or Temporary DTC P1164 comes on 4 Check for a Temporary DTC with the scan tool Is Temporary DTC P1164 indicated YES Replace the A F sensor Sensor 1 Intermittent failure system is OK at this time Check for poor connections or loose terminals at the A F sensor relay at the A F sensor Sensor 1 and at the ECM B V DTC P1166 A F Sensor Sensor 1 Heater Circuit Malfunction 1 Reset the ECM see page 11 4 2 Startthe engine Is DTC P1166 indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the A F sensor relay the A F sensor Sensor 1 and the 3 Check the following fuse No 14 OPTION 30 fuse in under hood fuse relay box No 2 B LAF A F HEATER 20A fuse in under dash fuse relay box No 4 ACG 10A in under dash fuse relay box Are any of the fuses blown YES Repair short in the wire between the A F sensor relay and the fuses NO Go to step 4 4 Measure voltage between ECM connector terminals A1 and A24 30 seconds after the ignition switch is turned ON Il ECM CONNECTOR A 31P 9 18 19 20121 28 29 30 7 Wire side of femaie terminals AFSHTC BLK WHT LG1 BRN YEL lt Is there battery voltage YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If
48. removal with a new base gasket B and a new o ring C then check these items When connecting the wire harness make sure the connection is secure and the terminal D is firmly locked into place When installing the fuel gauge sending unit E make sure the connection is secure and the connector is firmly locked into place Be careful not to bend or twist it excessively 11 152 lt Fuel Pump Fuel Gauge Sending Unit Replacement Special Tools Required 8 Remove the locknut and the fuel tank unit Fuel sender wrench 07XAA 001010A 1 Relieve the fuel pressure see page 11 144 2 Remove the fuel fill cap 3 Remove the seat cushion see page 20 80 4 Remove the access panel A from the floor GRO 9 Remove the stopper O Release the hook P and remove the fuel filter B the fuel gauge sending 5 Disconnect the fuel pump 5P connector B unit C the case D the wire harness E and the fuel pressure regulator F 6 Disconnect the quick connect fitting C from the fuel tank unit 10 When connecting the fuel tank unit make sure the connection is secure and the suction filter G is 7 Using the special tool loosen the fuel tank unit firmly connected to the fuel pump H locknut A 11 Install the fuel tank unit in the reverse order of removal with a new base gasket 1 and new o rings J then check these items When connecting the wire harness make sure the con
49. repeated if the intake air temperature IAT drops lower than 36 F 20 from its value at engine start up Enable Criteria At engine start up ECT and IAT are higher than 32 F 0 C but lower than 95 F 35 C At engine start up the ECT and IAT are within 12 F 7 C of each other Procedure 1 Connect the scan tool to the vehicle s data link connector DLC and bring up the tool s generic OBD II mode 2 Start the engine 3 Test drive the vehicle under stop and go conditions with short periods of steady cruise After about 2 5 miles 1 6 km the readiness code should switch from incomplete to complete 4 If the readiness code is still set to incomplete check for a temporary DTC If there is no DTC one or more of the enable criteria were probably not met repeat the procedure Bi Air Fuel Ratio A F Sensor Monitor and Readiness Code NOTE Do not turn the ignition switch off during the procedure All readiness codes are cleared when the battery is disconnected or when the ECM is cleared with the OBD II scan tool or Honda PGM Tester Enable Criteria ECT at 140 F 60 or higher Procedure 1 Connect the scan tool to the vehicle s data link connector DLC and bring up the tool s generic OBD II mode 2 Start the engine 3 Test drive the vehicle under stop and go conditions with short periods of steady cruise During the drive decelerate wirh the throttle fully closed for
50. running 0 V CONTROL 2 YEL BLK IGP2 POWER SOURCE T Power source for the ECM With the ignition switch ON Il battery voltage circuit With the ignition switch OFF about 0 V 3 YEL BLK IGP1 POWER SOURCE Power source for the ECM With the ignition switch ON II battery voltage circuit With the ignition switch OFF aboutOV 4 BLK PG2 POWER GROUND Ground for the ECM circuit Less than 1 0 V at all times 5 BLK PG1 POWER GROUND Ground for the ECM circuit Less than 1 0 V at all times 6 RED AFS AIR FUEL RATIO Detects A F sensor A F SENSOR SENSOR 1 sensor 1 signal SIDE 7 BLU CKP CRANKSHAFT Detects CKP sensor signal With engine running pulses POSITION SENSOR 9 RED BLU KS KNOCK SENSOR Detects knock sensor signal With engine knocking pulses 10 GRN YEL SG2 SENSOR GROUND Sensor ground Less than 1 0 V at all times 11 GRN WHT 561 SENSOR GROUND Sensor ground Less than 1 0 V at all times 12 BLK RED IACV IDLE AIR CONTROL Drives IAC valve gt With engine running duty controlled VALVE 15 RED BLK TPS THROTTLE POSITION Detects TP sensor signal With throttle fully open about 4 8 V SENSOR With throttle fully closed about 0 5 V 16 RED YEL AFS AIR FUEL RATIO Detects A F sensor A F SENSOR SENSOR 1 sensor 1 signal SIDE 18 WHT GRN VSS VEHICLE SPEED Detects VSS signal With ignition switch ON Il and front wheels SENSOR rotating cycles from about 0 V to about 5 V or battery voltage
51. the ECM see page 11 4 2 Turn the ignition switch ON II and wait for 40 seconds Is DTC P1607 indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM Ii NO Intermittent failure system is OK at this time A low battery can cause this problem Ask the customer if there has been any recent trouble starting the engine W 14 260 MIL Circuit Troubleshooting 1 Connect OBD II scan tool Honda PGM Tester see page 11 3 2 Turn the ignition switch ON II and read the OBD II scan tool Honda PGM Tester Does the OBD I scan tool Honda PGM Tester communicate with the ECM YES Go to step 3 NO to troubleshooting DLC Circuit Troubleshooting see page 11 109 3 Check the OBD II scan tool Honda PGM Tester for DTCs Are any DTCs indicated YES Go to the DTC Troubleshooting Index NO Go to step 4 4 Turn the ignition switch OFF 5 Turn the ignition switch ON Il and watch the Malfunction Indicator Lamp MIL Does the MIL come on and stay on for more than 20 seconds after turning the ignition switch ON 11 YES If the MIL always comes on and stays on go to step 76 But if the MIL sometimes works normally first check for these problems An intermittent short in the wire between the ECM E29 and the da
52. the symptom indication goes away with a known good ECM replace the original ECM to step 5 Measure voltage between ECM connector terminals A22 and A24 ECM CONNECTOR A 31 AFSHTC WHT LG1 BRN YEL Wire side of female terminals Is there battery voltage YES Go to step 6 NO Go to step 10 Turn the ignition switch OFF Disconnect ECM connector E 31P Turn the ignition switch ON II cont d 11 89 PGM FI System DTC Troubleshooting cont d 9 Connect ECM connector terminal E8 to body ground with a jumper wire then measure voltage between ECM connector terminals A1 and A24 ECM CONNECTORS AFSHTCR ORN E 31 P AFSHTC BLK WHT 31 TESTES 713 2 hs j u6l Znalr 2o 21 27128 291307 LG1 BRN YEL Wire side of female terminals Is there battery voltage YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repair open in the wire between the A F sensor Sensor 1 and A1 10 Turn the ignition switch OFF 11 Disconnect the ECM connector A 31P and the A F sensor Sensor 1 4P connector 12 Check for continuity between the A F sensor Sensor 1 4P connector terminal No 3 and body ground
53. to VTEC solenoid valve 2P connector terminal No 1 and check the oil pressure at an engine speed of 3 000 rpm Is the oil pressure above 390 kPa 4 0 kgf cnf 57 psi YES Go to step 27 NO Inspect the VTEC solenoid valve see page 11 128 i With the battery terminals still connected to the VTEC solenoid valve connector measure voltage between ECM connector terminal B9 and body ground ECM CONNECTOR B 24P BA 12112311 VTPSW BLU BLK Wire side of female terminals Is there battery voltage above 4 000 rpm YES Go to step 28 NO Replace the VTEC oil pressure switch see page 11 128 8 Turn the ignition switch OFF Disconnect the battery terminals from the VTEC solenoid valve terminal connector cont d 11 125 VTEC VTC DTC Troubleshooting cont d 30 Disconnect ECM connector B 24P 31 Check for continuity between ECM connector terminal B15 and body ground ECM CONNECTOR 24 VTS GRN YEL Wire side of female terminals Is there continuity YES Repair short in the wire between the VTEC solenoid valve and the ECM B15 NO Go to step 32 11 126 32 Connect VTEC solenoid valve 2P connector terminal No 2 to body ground with a jumper wire VTEC SOLENOID VALVE 2P CONNECTOR Wire side of female terminals 33 Check for continuity between ECM connector terminal B15 and body ground ECM CONNECTOR B 24P VTS GRN Y
54. trim is higher than 1 00 the amount of injected fuel must be increased If it is lower than 1 00 the amount of injected fuel must be reduced Intake Air The IAT sensor converts intake air temperature into With cold engine YES Temperature voltage and signals the ECM When intake air Same as ambient IAT temperature is low the internal resistance of the sensor temperature and ECT increases and the voltage signal is higher _ _ Throttle Based on the accelerator pedal position the opening At idle speed YES Position angle of the throttle valve is indicated about 10 Ignition Ignition timing is the ignition advance angle set by the At idle speed 8 5 NO Timing ECM The ECM matches ignition timing to driving BTDC when the SCS conditions service signal line is jumped with the Honda _ Calculated CLV is the engine load calculated from MAP data At idle speed YES Load Value 12 34 CLV At 2 500 rpm with no load 14 34 11 14 lt ECM Electrical Connections FUEL PUMP PGM FI MAIN RELAY 2 BATTERY RADIATOR FAN RELAY IGNITION SWITCH UNDER HOOD FUSE RELAY BOX CDNo 19 BATTERY 80A No 6 ECU ECM 15A No 20 IG 40A Canada 50A No 14 OPTION 40A 5 No 9 BACK UP 7 5A No 7 HORN STOP 15A UNDER DASH ECM FUSE RELAY BOX DNo 17 FUEL PUMP 15A DNo 4 10A No 1 IGN COIL 15A No
55. 0 2 in Hg or above 2 1 kPa 16 mmHg 0 6 in Hg install a new valve and retest Move the vacuum pump hose from the vacuum fitting to the pressure fitting and move the vacuum gauge hose from the vacuum side to the pressure side A as shown Slowly pressurize the vapor line while watching the gauge The pressure should stabilize momentarily above 1 0 kPa 8 mmHg 0 3 in Hg If the pressure momentarily stabilizes valve opens above 1 0 kPa 8 mmHg 0 3 in Hg the valve is OK If the pressure stabilizes below 1 0 kPa 8 mmHg 0 3 in Hg install a new valve and retest P Fuel Tank Vapor Control Valve Test Special Tools Required Valve Test Vacuum Pump Gauge 0 30 in Hg A973X 041 XXXXX 1 Make sure the fuel tank is less than half full Float Test 2 Remove the fuel fill cap 1 Make sure the fuel tank is less than half full 3 Disconnect the fuel tank vapor signal tube A 2 Remove the fuel fill cap to relieve fuel tank pressure then reinstall the cap 3 Disconnect the fuel tank vapor recirculation tube A and connect a vacuum pump to it 4 Disconnect the vacuum hoses A from the EVAP canister B then plug the ports with plugs C A973X 041 XXXXX 4 Plug the line B 5 Apply vacuum to the fuel tank vapor recirculation tube If the vacuum holds replace the fuel tank vapor control valve see page 11 189 If the vacuum does not hold the float is OK
56. 0 and body ground ECM CONNECTOR A 31P Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM A20 and the TP sensor or repair short in the wire between the 8 and the knock sensor NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 106 68 Measure voltage between body ground and ECM connector terminal 5 ECM CONNECTOR E 31P YEL BLU 8 9 20121 29 30 31 Wire side of female terminals Is there about 5 V YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO to step 69 69 Turn the ignition switch OFF 70 Disconnect the fuel tank pressure FTP sensor 3P connector 71 Turn the ignition switch ON Il 72 Measure voltage between body ground and ECM connector terminal E5 ECM CONNECTOR E 31 vcc YEL BLU Wire side of female terminals Is there about 5 V YES Replace the FTP sensor W NO Go to step 73 73 Turn the ignition switch OFF 74 Disconnect ECM connector E 31P 75 Check for cont
57. 1 69 2 21 J f ALTL ALTF ALTC IGPLS1 IGPLS2 IGPLS3 IGPLSA G m vss 1 wHT GRN YEL BLU WHT BLU WHT RED WHT GRN YEL GRN BLU RED WHT BLU T BLK YEL BLK YEL BLK YEL JUNCTION CONNECTOR JUNCTION CONNECTOR BLK YEL WHT BLU ICM WHT RED WHT GRN No 1 IGNITION COIL No 2 IGNITION COIL vss m EVAP CANISTER PURGE VALVE ALT To SPARK PLUG To SPARK PLUG ICM ICM No 3 IGNITION COIL To SPARK PLUG To SPARK PLUG No 4 IGNITION COIL 11 41 Fuel and Emissions Systems System Descriptions cont d 4 ECM Circuit Diagram cont d Ou BLK 6101 IGP1 mx E IGP2 A2 YEL BLK C509 YEL GRN vEL GRN gt BLK et cen I FUEL PUMP G551 YEL GRN YEL BLK GRN YEL GRN YEL w YEL BLK PGM FI MAIN RELAY 2 YEL BLK MRLY PGM FI MAIN RELAY 1 BLK ORN A F SENSOR RELAY To IMMOBILIZER UNIT AFSHTCR 8 dem RED BLU _ 11 42 4 SECONDARY 025 SENSOR 2 SO2SHTC C453 YEL BLU _ LT GRN FIP d om LT GRN FTP SENSOR vsv Hor GRN RED LT GRN RED T BLK ORN EVAP CANISTER VENT SHUT VALVE 2WBS ek Gane BLU RED 7 PEN
58. 11 119 IL Malfunction ess P0107 3 Manifold Absolute Pressure MAP Sensor Circuit see page 11 52 ae Low Voltage P0108 3 i Manifold Absolute Pressure MAP Sensor Circuit see page 11 53 i High Voltage P0112 10 Intake Air Temperature Sensor Circuit Low see page 11 55 Voltage P0113 10 Intake Air Temperature IAT Sensor Circuit High see page 11 56 Voltage P0116 86 P0116 Engine Coolant Temperature ECT Sensor Range see page 11 57 w Performance Problem P0117 6 reus Engine Coolant Temperature ECT Sensor Circuit see page 11 58 Low Voltage P0118 6 ae Engine Coolant Temperature ECT Sensor Circuit see page 11 59 High Voltage P0122 7 Throttle Position TP Sensor Circuit Low Voltage see page 11 60 1 0123 7 Throttle Position TP Sensor Circuit High Voltage see page 11 62 P0128 87 P0128 Cooling System Malfunction see page 11 64 P0134 41 Air Fuel Ratio A F Sensor Sensor 1 No Activity see page 11 65 2 Detected P0137 63 P0137 Secondary Heated Oxygen Sensor Secondary HO2S see page 11 65 EN Sensor 2 Circuit Low Voltage P0138 63 P0138 Secondary Heated Oxygen Sensor Secondary HO2S see page 11 66 Sensor 2 Circuit High Voltage P0139 63 P0139 Secondary Heated Oxygen Sensor Secondary HO2S see page 11 67 Sensor 2 Slow Response P0141 65 Secondary Heated Oxygen Sensor Secondary 25 see page 11 68 Sensor 2
59. 1P o 32 Reinstall the PGM FI main relay 2 A 35 Turn the ignition switch ON II 36 Measure voltage between ECM connector terminal E9 and body ground ECM CONNECTOR E 31P IAE RAA 2 1724 eiea Wire side of female terminals Is there battery voltage YES Go to step 37 NO Repair open in the wire between the No 17 FUEL PUMP 15 fuse and the ECM 9 cont d 11 101 PGM FI System MIL Circuit Troubleshooting cont d 4 37 Measure voltage between ECM PCM connector 40 Measure voltage between PGM FI main relay 1 4P terminal E7 and body ground connector terminal No 4 and body ground PGM FI MAIN RELAY 1 ECM CONNECTOR E 31P 4P CONNECTOR MRLY RED YEL B WHT BLK Wire side of female terminals Wire side of female terminals Is there battery voltage Is there battery voltage YES Go to step 42 YES Go to step 41 NO Go to step 38 NO Repair open in the wire between the No 6 15A fuse and the PGM FI main relay 1 38 Turn the ignition switch OFF 39 Remove the PGM FI main relay 1 A 41 Check for continuity between PGM FI main relay 1 e 4P connector terminal No 3 and ECM connector terminal E7 PGM FI MAIN RELAY 1 4P CONNECTOR gt Wire side of female terminals MRLY RED YEL RED YEL Wire side of female terminals Is there continuity YES T
60. 3 or P0304 indicated YES Go to step 18 NO Intermittent misfire due to bad contact at the injector connector no misfire at this time Make sure the injector connection is secure Check for poor connections or loose terminals at the injector 18 Determine which cylinder s had the misfire Does the misfire occur in the cylinder where the injector was exchanged YES Replace the faulty injector IM to step 19 19 Turn the ignition switch OFF 20 Disconnect the ignition coil 3P connector from the problem cylinder 21 Turn the ignition switch ON 11 22 23 24 25 lt Measure voltage between ignition coil 3P connector terminal No 3 and body ground IGNITION COIL 3P CONNECTOR 1 2 iG BLK WHT Wire side of female terminals Is there battery voltage YES Go to step 23 NO Repair open in the wire between the No 1 IGN COIL 15A fuse and the ignition coil Turn the ignition switch OFF Check for continuity between ignition coil 3P connector terminal No 2 and body ground IGNITION COIL 3P CONNECTOR 1 GND 2 jeu Wire side of female terminals Is there continuity YES Go to step 25 NO Repair open in the wire between the ignition coil and G101 8 Disconnect ECM connector A 31P cont d 11 73 PGM FI System DTC Troubleshooting cont d 26 Check for continuity between body ground and ECM connector terminal see table
61. 5 V YES Intermittent failure system is OK at this time Check for poor connections or loose terminals at the FTP sensor and at the NO Go to step 6 Reinstall the fuel fill cap Disconnect the FTP sensor 3P connector Turn the ignition switch ON 1 Measure voltage between FTP sensor 3P connector terminals No 1 and No 2 FUEL TANK PRESSURE SENSOR 3P CONNECTOR 563 Wire side of female terminals Is there about 5 V YES Go to step 11 NO Repair open in the wire between the FTP sensor and the ECM E5 8 11 Measure voltage between FTP sensor connector terminals No 2 and No 3 FUEL TANK PRESSURE SENSOR 3P CONNECTOR FTP LT GRN 563 Wire side of female terminals Is there about 5 V YES Replace the FTP sensor iM NO Go to step 12 Turn the ignition switch OFF Disconnect ECM connector E 31P Check for continuity between FTP sensor 3P connector terminal No 3 and body ground FTP SENSOR 3P CONNECTOR FTP LT GRN Wire side of female terminals Is there continuity YES Repair short in the wire between the FTP sensor and the ECM E14 NO Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E Turn the igni
62. 6 0020201 A T pressure hose 2 210 mm 07MAJ PY4011A A T pressure adapter 07MAJ PY 40120 Oil pressure hose 07ZAJ S5AA200 1 Reset the ECM see page 11 4 2 Check the engine oil level and refill if necessary 3 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 4 Road test the vehicle Accelerate in the 1st gear to an engine speed over 4 000 rpm Hold the speed for at least 2 seconds If DTC P1259 is not repeated during the first road test repeat the test two more times Is DTC P1259 indicated YES Go to step 5 NO Intermittent failure system is OK at this time Check the oil consumption if oil was added in step 2 Check for poor connections or loose terminals at the VTEC solenoid valve the VTEC oil pressure Switch and at the 5 Turn the ignition switch OFF Disconnect the VTEC oil pressure switch 2P connector Check for continuity between VTEC oil pressure switch 2P connector terminals No 1 and No 2 VTEC OIL PRESSURE SWITCH 2P CONNECTOR Terminal side of male terminals Is there continuity YES Go to step 8 NO Replace the VTEC oil pressure switch Turn the ignition switch ON II Measure voltage between VTEC oil pressure switch 2P connector terminal No 1 and body ground VTEC OIL PRESSURE SWITCH 2P CONNECTOR VTPSW BLU BLK Wire side of female terminals Is there
63. C2 GRN YEL YEL BLU Wire side of female terminals Wire side of female terminals Is there about 5 V YES Repair open in the wire between the ECM A20 and the TP sensor iM NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the o original ECM 11 61 PGM FI System DTC Troubleshooting cont d DTC P0123 TP Sensor Circuit High Voltage 7 Measure voltage between ECM connector terminals A10 and A20 1 Turn the ignition switch ON Il ECM CONNECTOR A 31P 2 Check the throttle position with the scan tool Is there about 10 or 0 5 V when the throttle is fully closed and about 9096 or 4 5 V when the throttle is fully opened YES Intermittent failure system is OK at this time Check for poor connections or loose terminals at the TP sensor and at the lB NO Go to step 3 Turn the ignition switch OFF Disconnect the TP sensor 3P connector Turn the ignition switch ON II Atthe wire harness side measure voltage between the TP sensor 3P connector terminals No 1 and No 3 TP SENSOR 3P CONNECTOR VCC2 SG2 GRN YEL YEL BLU Wire side of female terminals Is there about 5 V YES Replace the throttle body the TP sensor is not available separately B NO Go to step 7 11 62 20 21
64. CM CONNECTOR E 31P 20 21 29 30 31 Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM E15 and the ELD m NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with known good ECM replace the original ECM I DTC P1298 ELD Circuit High Voltage 1 Reset the ECM see page 11 4 2 Start the engine 3 Turn on the headlights Is DTC P1298 indicated YES Go to step 4 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the ELD and at the 4 Turn the ignition switch and headlights OFF 5 Disconnect the ELD 3P connector 6 Turn the ignition switch ON Il 7 Measure voltage between body ground and ELD 3P connector terminal No 1 ELD 3P CONNECTOR 161 BLK ORN Wire side of female terminals Is there battery voltage YES Go to step 8 NO Check the No 4 10A fuse in the under dash fuse relay box If the fuse is OK repair open in the wire between the No 4 ACG 10A fuse and the ELD m 8 Turn the ignition switch OFF 9 Connect ELD 3P connector terminal No 3 to body ground with a jumper wire ELD 3P CONNECTOR 11213 m o GRN RED JUMPER WIRE Wire side of female terminals 10
65. CMP sensor detects camshaft angle position for the VTC system were TERMINAL MAGNET cont d 11 31 Fuel and Emissions Systems System Descriptions cont d idie Control System When the engine is cold the A C compressor is on the transmission is in gear the brake pedal is pressed the power steering load is high or the alternator is charging the ECM controls current to the Idle Air Control IAC valve to maintain the correct idle speed Refer to the System Diagram to see the functional layout of the system Brake Pedal Position Switch The brake pedal position switch signals the ECM when the brake pedal is pressed Electrical Power Steering EPS Senser The EPS sensor signals the ECM when the power steering load is high Idle Air Control IAC Valve To maintain the proper idle speed the IAC valve changes the amount of air bypassing the throttle body in response to an electrical signal from the ECM From AIR CLEANER To INTAKE MANIFOLD IAC VALVE 11 32 Fuel Supply System Fuel Cut off Control During deceleration with the throttle valve closed current to the injectors is cut off to improve fuel economy at engine speeds over 1 030 rpm Fuel cut off action also occurs when engine speed exceeds 6 900 rpm regardless of the position of the throttle valve to protect the engine from over revving When the vehicle is stopped the ECM cuts the fuel at engine speeds over 6 500 rpm Fuel Pump Co
66. Check for continuity between ECM connector terminal E6 and body ground ECM CONNECTOR E 31P SO2SHTC BLK WHT Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM E6 and the secondary HO2S Sensor 2 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 12 Measure voltage between secondary HO2S Sensor 2 4P connector terminal No 4 and body ground SECONDARY HO2S SENSOR 2 4P CONNECTOR 112 314 161 BLK ORN Terminal side of male terminals Is there battery voltage YES Go to step 13 NO Check the No 4 10A fuse in the under dash fuse relay box If the fuse is OK repair open in the wire between the secondary HO2S Sensor 2 and No 4 ACG 10A fuse 16 17 lt Turn the ignition switch OFF Reconnect the secondary HO2S Sensor 2 connector Disconnect ECM connector E 31P Turn the ignition switch ON il Measure voltage between ECM connector terminal E6 and 5 ECM CONNECTORS BLK 31 SO2SHTC BLK WHT E 31 P BANADE 7 223 24 26 TL 12930 81 Wire side of female terminals Is there 0 1 V or less YES Repair open in the wire between the ECM
67. DLC terminals No 5 and No 16 DATA LINK CONNECTOR DLC LG BRN YEL VLL ERVAVAIE AVAL WHT RED Terminal side of female terminals Is there battery voltage YES Go to step 4 NO Repair open in the wire between DLC terminal No 5 and the ECM E3 Turn the ignition switch ON II Measure voltage between DLC terminals No 5 and No 7 DATA LINK CONNECTOR DLC LG K LINE BRN YEL LT BLU 111415101107 VAI Terminal side of female terminals Is there 8 5 V or more YES Go to step 10 NO to step 6 6 Turn the ignition switch OFF cont d 11 109 PGM FI System DLC Circuit Troubleshooting cont d 7 Disconnect ECM connector E 31P Make sure the OBD II scan tool or Honda PGM Tester is disconnected from the DLC 8 Check for continuity between DLC terminal No 7 and body ground DATA LINK CONNECTOR DLC K LINE LT BLU ZEIZ 3144167 2 Ve L7 Terminal side of female terminals Is there continuity YES Repair short to ground in the wire between DLC terminal No 7 and the ECM E23 After repairing the wire check the DTC with the OBD II scan tool Honda PGM Tester and go to the DTC Troubleshooting index M NO Go to step 9 9 Check for continuity between DLC terminal No 7 and ECM terminal E23 ECM CONNECTOR E 31P Wire side of female terminals 21 3 K LINE
68. Do the valve test A973X 041 XXXXX 5 Disconnect the vacuum hose D from the EVAP canister vent shut valve E and connect a vacuum pump to the vacuum hose 6 Pump the vacuum pump 80 times If the vacuum holds go to step 7 f the vacuum does not hold go to step 10 11 187 EVAP System Fuel Tank Vapor Control Valve Test cont d 7 Connect a second vacuum pump to the fuel tank 9 Fill the fuel tank with fuel then check for fuel in the vapor signal tube A EVAP two way valve A and fuel tank vapor recirculation hose B NOTE At either location tiny droplets of fuel are normal If fuel runs out of the hoses at either location replace the fuel tank vapor control valve If the fuel does not run out of the hoses the fuel tank vapor system function is normal A973X 041 XXXXX 8 Apply vacuum 1 pump to the fuel tank vapor signal tube A then check the vacuum on the pump in step 6 If the vacuum holds replace the fuel tank vapor control valve see page 11 189 If the vacuum is released go to step 9 Check for fuel running out 10 Disconnect the fuel tank vapor quick disconnect from the EVAP canister then plug the port on the canister Reapply vacuum 80 pumps If the vacuum holds replace the fuel tank control valve see page 11 189 If the vacuum does not hold inspect the EVAP canister vent shut valve o ring If the o ring is OK replace the EVAP
69. E Troubleshooting step 3 on page 11 175 step 1 on page 11 180 FUEL TANK VAPOR CONTROL VALVE Test page 11 187 Replacement page 11 189 EVAPORATIVE EMISSION EVAP CANISTER Troubleshooting step 28 on page 11 183 Replacement page 11 189 FUEL TANK PRESSURE SENSOR Troubleshooting page 11 171 EVAPORATIVE EMISSION EVAP BYPASS SOLENOID VALVE Troubleshooting step 12 on page 11 176 step 10 on page 11 181 EVAPORATIVE EMISSION EVAP CANISTER VENT SHUT VALVE EVAPORATIVE EMISSON EVAP Troubleshooting TWO WAY VALVE step 23 on page 11 178 Test page 11 186 step 19 on page 11 182 DTC Troubleshooting DTC P0451 FTP Sensor Range Performance 6 Connect a vacuum pump to the open end of the Problem hose Speciai Tools Required Vacuum Pump Gauge 0 30 in Hg A973X 041 XXXXX 1 Remove the fuel fill cap 2 Turn the ignition switch ON II 3 Monitor fuel tank pressure FTP sensor voltage with the Honda PGM Tester or measure voltage between ECM connector terminals E4 and E14 ECM CONNECTOR E 31 Ox SG3 ih 7 Turn the ignition switch ON II 8 Monitor FTP sensor voltage with the Honda PGM Tester or measure voltage between ECM connector terminals E4 and E14 and carefully squeeze the vacuum pump a little FTP LT GRN ECM CONNECTOR E 31 Wire side of female terminals 563 Is there about 2 5V YES Go
70. E COOLANT Detects ECT sensor signal With the ignition switch ON II about 0 1 4 8 V TEMPERATURE SENSOR depending on engine coolant temperature 9 BLU BLK VTPSW VTEC OIL Detects VTEC oil pressure With engine at low engine speed about 0 V HA _ PRESSURE SWITCH switch signal With engine at high engine speed battery voltage 10 WHT BLU ALTL ALTERNATORL Detects alternator L signal With ignition switch ON 11 about 0 V SIGNAL With engine running battery voltage 13 WHT RED ALTF ALTERNATOR FR Detects alternator FR signal With engine running about 0 V 5 V SIGNAL i depending on electrical load 15 GRN YEL VTS VTEC SOLENOID Drives VTEC solenoid valve At idle about 0 V VALVE 17 RED YEL IAT INTAKE AIR Detects IAT sensor signal With ignition switch ON II about 0 1 V 4 8 V TEMPERATURE SENSOR depending on intake air temperature 18 WHT GRN ALTC ALTERNATOR Sends alternator control With engine running about 0 V 5 V CONTROL signal depending on electrical load E 21 YEL BLU PCS EVAPORATIVE Drives EVAP canister purge With engine running engine coolant below 149 F EMISSION CANISTER valve 65 battery voltage PURGE VALVE With engine running engine coolant above 149 F 65 C duty controlled 23 BLK WHT VTC VTC OIL CONTROL Drives VTC oil control With the ignition switch ON II 0 V 1 SOLENOID VALVE SIDE solenoid valve i cont d 11 21 Fuel and Emissions Systems System Descr
71. EL Wire side of female terminals Is there continuity YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repair open in the wire between the VTEC solenoid valve and the ECM B15 v lt e VTC Oil Control Solenoid Valve Removal Test 1 Remove the VTC oil control solenoid valve A 4 Connect the battery positive terminal to VTC oil control solenoid valve 2P connector terminal No 2 NOTE Install the valve in the reverse order of removal with a new o ring B then check these VTC OIL CONTROL SOLENOID items VALVE 2P CONNECTOR Clean and dry the VTC oil control solenoid valve mating surface Coat the O ring with engine oil Do not install the VTC oil control solenoid valve Terminal side of while wearing fibrous gloves male terminals Be careful not to contaminate the cylinder head opening BATTERY 5 Connect the battery negative terminal to VTC oil control solenoid valve 2P connector terminal No 1 then make sure the valve A opens fully 12 1 2 kgf m 8 7 Ibf ft 2 Check the VTC oil control solenoid valve filter for clogging If it is clogged replace the VTC oil control solenoid valve 3 Check the clearance between the port advance side and the valve The clearance A shou
72. ES Replace the FTP sensor M Go to step 12 Measure voltage between ECM connector terminals E4 and E14 ECM CONNECTOR E 31 563 PNK FTP LT GRN Wire side of female terminals Is there about 5 V YES Repair open in the wire between the FTP sensor and the ECM E14 8 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original DTC P1456 EVAP Control System Leakage Fuel Tank System NOTICE The fuel system is designed to allow specified maximum vacuum and pressure conditions Do not deviate from the vacuum and pressure tests as indicated in these procedures Excessive pressure vacuum would damage the EVAP components or cause eventual fuel tank failure Special Tools Required gt Vacuum Pump Gauge 0 30 in Hg A973X 041 XXXXX This is a two trip code Once cleared it cannot be reproduced in one trip Also certain specific driving and ambient conditions must occur before the ECM will complete the system checks Additional test drives may still not meet the specific conditions needed to reproduce the code Follow these troubleshooting procedures carefully to ensure the integrity of the system and to confirm the cause of the problem or code NOTE Fresh fuel has a higher volatility that creates greater pressure vacuum
73. Fuel and Emissions Fuel and Emissions Systems Special Tools General Troubleshooting Information DTC Troubleshooting Index Symptom Troubleshooting Ihr cT System Descriptions How to Set Readiness Codes PGM FI System Component Location Index DTC Troubleshooting MIL Circuit Troubleshooting DLC Circuit Troubleshooting Injector Replacement A F Sensor Replacement Secondary HO2S Replacement ECT Sensor Replacement CMP Sensor B TDC Sensor Replacement IAT Sensor Replacement Knock Sensor Replacement CKP Sensor Replacement VTEC VTC Component Location Index DTC Troubleshooting VTC Oil Control Solenoid Valve Removal Test CMP Sensor A Replacement VTEC Solenoid Valve Removal Inspection Idle Control System Component Location Index DTC Troubleshooting Signal Circuit Troubleshooting Alternator FR Signal Circuit Troubleshooting EPS Signal Circuit Troubleshooting Brake Pedal Position Switch Signal Circuit Troubleshooting Idle Speed Inspection ECM Idle learn Procedure Fuel Supply System Component Location Index Fuel Pump Circuit Troubleshooting Fuel Pressure Reliev
74. Measure resistance between the TP sensor 3P connector terminals No 2 and No 3 with the throttle fully closed TP SENSOR 3P CONNECTOR vcc2 TPS Terminal side of male terminals Is there about 4 5kQ YES Go to step 10 NO Replace the throttle body the TP sensor is not available separately li 10 Disconnect ECM connector A 31P lt 11 At the wire harness side check for continuity 13 At the wire harness side check for continuity between TP sensor 3P connector terminal No 2 between TP sensor 3P connector terminal No 2 and body ground and body ground TP SENSOR 3P CONNECTOR TP SENSOR 3P CONNECTOR TPS RED BLK Wire side of female terminals Wire side of female terminals Is there continuity Is there continuity YES Update the ECM if it does not have the latest YES Repair short in the wire between the ECM software or substitute a known good ECM then A15 and the TP sensor recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the NO Go to step 12 original ECM e 12 Connect ECM connector terminal A15 to body NO Repair open in the wire between the ECM ground with a jumper wire A15 and the TP sensor 14 Measure voltage between ECM connector ECM CONNECTOR A 31P terminals A10 and A20 ECM CONNECTOR A 31P 18 19 20121 27 28 29 502 VC
75. OR sensor TOP DEAD CENTER SENSOR 27 BRN IGPLS4 No 4 IGNITION Drives No 4 ignition coil With ignition switch ON II about 0 V COIL PULSE With engine running pulses 28 WHT BLU IGPLS3 No 3 IGNITION Drives No 3 ignition coil COIL PULSE j 29 BLU RED IGPLS2 No 2 IGNITION Drives No 2 ignition coil COIL PULSE 30 YEL GRN IGPLS1 No 1 IGNITION Drives No 1 ignition coil COIL PULSE 11 20 ECM Inputs and Outputs at Connector B 24P 2 INJ4 VIC 3 INJ3 4 INJ2 NOTE Standard battery voltage is 12 V Wire side of female terminals Terminal Wire color Terminal name Description Signal number p 1 BLUAWHT VTC CONTROL Drives VTC oit control With ignition switch ON II 0 V SOLENOID VALVE SIDE solenoid valve 2 YEL INJ4 4 INJECTOR Drives No 4 injector At idle duty controlled 3 BLU INJ3 No 3INJECTOR Drives No 3 injector 4 RED INJ2 No 2 INJECTOR Drives No 2 injector 5 BRN 1NJ1 No 1 INJECTOR Drives No 1 injector 6 GRN FANC RADIATOR FAN Drives radiator fan relay With radiator fan running about 0 V CONTROL With radiator fan stopped battery voltage _ 7 GRN WHT RVS REVERSE LOCK Drives reverse lock solenoid With vehicle speed below 9 4 mph 15 km h SOLENOID VALVE valve battery voltage With vehicle speed above 12 5 mph 20 km h 0 V 8 RED WHT ECT ENGIN
76. PURGE canister port on the EVAP two way valve VALVE 2P CONNECTOR PCS YEL BLU Q A973X 041 XXXXX Wire side of female terminals Is there continuity YES Go to step 9 12 Turn the EVAP bypass solenoid valve on with the Honda PGM Tester or connect ECM connecter the EVAP canister purge valve terminal E20 to body ground with a jumper wire 9 Disconnect ECM connector B 24P ECM CONNECTOR E 31P 10 Check for continuity between EVAP canister purge valve 2P connector terminal No 2 and body ground 1 1121314 516 7 6191 EVAP CANISTER PURGE 271 29130191 VALVE 2P CONNECTOR 2WBS BLU RED JUMPER ZN WIRE 1 Wire side of female terminals 13 Turn the ignition switch ON II Wire side of female terminals 14 Apply vacuum to the hose Does the valve hold vacuum Is there continuity YES Go to step 15 YES Repair short in the wire between the EVAP canister purge valve and the ECM 21 NO to step 20 NO Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 176 15 Turn the ignition switch OFF 16 Disconnect the EVAP bypass solenoid valve 2P 17 connector Check for continuity between EVAP bypass solenoid valve 2P connector terminal No 2 and body gr
77. R 2 MANIFOLD ABSOLUTE PRESSURE MAP SENSOR ENGINE COOLANT TEMPERATURE ECT SENSOR INTAKE AIR TEMPERATURE SENSOR CRANKSHAFT POSITION CKP SENSOR D KNOCK SENSOR CAMSHAFT POSITION CMP SENSOR B TOP DEAD CENTER TDC SENSOR CAMSHAFT POSITION CMP SENSOR A IDLE AIR CONTROL IAC VALVE THROTTLE BODY INJECTOR 19 FUEL PULSATION DAMPER FUEL FILTER 49 FUEL PRESSURE REGULATOR FUEL PUMP 17 FUEL TANK RESONATOR AIR CLEANER POSITIVE CRANKCASE VENTILATION PCV VALVE THREE WAY CATALYTIC CONVERTER EVAPORATIVE EMISSION EVAP CANISTER EVAPORATIVE EMISSION EVAP CANISTER PURGE VALVE EVAPORATIVE EMISSION EVAP CANISTER VENT SHUT VALVE EVAPORATIVE EMISSION EVAP TWO WAY VALVE 4 EVAPORATIVE EMISSION BYPASS SOLENOID VALVE FUEL TANK PRESSURE FTP SENSOR EVAPORATIVE EMISSION EVAP VALVE FUEL TANK VAPOR CONTROL VALVE FUEL TANK VAPOR RECIRCULATION VALVE 8 INTAKE AIR BYPASS CONTROL THERMAL VALVE 11 25 Fuel and Emissions Systems System Descriptions cont d System The Programmed Fuel Injection PGM FI system is a sequential multiport fuel injection system Air Conditioning A C Compressor Clutch Relay When the ECM receives a demand for cooling from the A C system it delays the compressor from being energized and enriches the mixture to assure smooth transition to the A C mode Air Fuel Ratio
78. R 2P CONNECTOR 562 IAT GRN YEL RED YEL JUMPER WIRE Wire side of female terminals 6 Turn the ignition switch ON II 11 56 11 12 Check the IAT with the scan tool Is 4 F 20 or less or L Limit in Honda mode of PGM Tester or 5 V indicated YES Go to step 8 NO Replace the IAT sensor lii Turn the ignition switch OFF Remove the jumper wire Connect ECM connector terminals A10 and B17 with a jumper wire ECM CONNECTORS A 31P B 24 P SG2 GRN YEL IAT RED YEL JUMPER WIRE Wire side of female terminals Turn the ignition switch ON 1 Check the IAT with the scan tool Is 4 F 20 C or less or L Limit in Honda mode of PGM Tester or 5 V indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original I NO Repair open in the wire between the ECM A10 B17 and the IAT sensor IN DTC P0116 ECT Sensor Range Performance Problem NOTE If DTC P0117 and or P0118 are stored at the same time as DTC P0116 troubleshoot those DTCs first then recheck for DTC P0116 1 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle 2 Check the ECT with the scan tool Is 176 212 F 80 100 C or 0 5 0 8 V in
79. SENSOR A 3P CONNECTOR Wire side of female terminals Is there battery voltage YES Go to step 9 Wire side of female terminals NO Repair open in the wire between the CMP sensor and G101 8 Is there battery voltage 9 Substitute a known good CMP sensor and YES Go to step 7 recheck Check the No 4 10A fuse in the under Is DTC P0340 and or P0344 indicated dash fuse relay box If the fuse is OK repair open in the wire between the CMP sensor A and No 4 ACG YES Update the ECM if it does not have the latest 10A fuse software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM M b o NO Replace the original CMP sensor A see page 11 128 cont d 11 121 VTEC VTC DTC Troubleshooting cont d 10 Measure voltage between ECM connector terminal 11 12 13 A25 and body ground ECM CONNECTOR A 31P 5 10 11 12 15 22 23 24 2526 CMP A BLU WHT Wire side of female terminals Is there about 5 V YES Repair open in the wire between the ECM A25 and CMP sensor NO to step 11 Turn the ignition switch OFF Disconnect ECM connector A 31P Check for continuity between ECM connector terminal A25 and body ground ECM CONNECTOR A 31P Wire side of female terminals Is there con
80. The optimum condition for testing is fresh fuel and must be less than a full tank If possible to assist in leak detection add 1 gallon of fresh fuel to the tank as long as it will not fill the tank just before starting these procedures Fuel Fill Cap Check 1 Check the fuel fill cap the cap must say If not tightened 3 clicks check engine light may come Is the proper fuel fill installed and properly tightened YES Go to step 2 NO Replace or tighten the cap 2 Check the fuel fill cap seal Is the fuel fill cap seal missing or damaged YES Replace the fuel fill l NO The fuel fill cap is OK Go to step 3 Canister Purge Valve Test 3 Disconnect the vacuum hose from the EVAP canister purge valve A and connect a vacuum pump to the hose CN A973X 041 XXXXX 4 Turn the ignition switch ON II 5 Apply vacuum to the hose Does the valve hold vacuum YES The EVAP canister purge valve is OK Go to step 11 NO Go to step 6 6 Turn the ignition switch OFF 7 Disconnect the EVAP canister purge valve 2P connector cont d 11 175 EVAP System DTC Troubleshooting cont d 8 Check for continuity between EVAP canister purge EVAP Bypass Solenoid Valve Test valve 2P connenctor terminal No 2 and body ground 11 Disconnect both vacuum hoses from the EVAP two way valve A and connect a vacuum pump to the EVAP CANISTER
81. VALVE YEL BLK lacy m NS NES d TEES ET BLK wa 6101 YEL BLK EI 29 sr H BRN YEL CMP SENSOR B TDC SENSOR vk nF AT uu BRN YEL CKP SENSOR BARO SENSOR heh JUNCTION Tha CONNECTOR Jp VEL T Lr P G101 11 38 vis a As YEL BLU RED BLK REO BLU B1 BLU WHT AFS s F WHT AFSHTC Ho BLK WHT C101 VTPSW BS emm BRN YEL BLU GRI WHT BLK RED VTEC OIL PRESSURE SWITCH T VTEC SOLENOID VALVE Gi01 MAP SENSOR YEL BLU RED BLK GRN YEL TP SENSOR neon LJ cue KNOCK SENSOR VTC OIL CONTROL SOLENOID VALVE C452 BLU WHT BLK RED bod A F SENSOR d SENSOR 1 cont d 11 39 Fuel and Emissions Systems System Descriptions cont d ECM Circuit Diagram cont d py 1 GRN YEL E 562 u RED YEL ECT B8 RED WHT 161 2 BRN YEL 162 BRN YEL CMPA 2 BLU WHT RVS pue GRN WHT 11 40 BRN YEL tol BRN YEL jr BAN VEL GRN YEL RED YEL IAT SENSOR GRN YEL RED WHT ECT SENSOR JUNCTION CONNECTOR CMP SENSOR A JUNCTION CONNECTOR T BRN YEL o BLK VEL E REVERSE LOCK SOLENOID VALVE m A
82. Wire side of female terminals Is there battery voltage YES Go to step 9 NO Repair open in the wire between the CKP sensor and G101 8 Substitute a known good CKP sensor and recheck Is DTC P0335 and or P0336 indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repiace the original CKP sensor 10 Measure voltage between ECM connector terminal A7 and body ground ECM CONNECTOR A 31P CKPIBLU 112131415 6 7 9 1011112 151161 118119120 21 22 23124 25 26 27 28 29 30 Wire side of female terminals Is there about 5 V YES Repair open in the wire between the ECM A7 and the CKP sensor NO Go to step 11 11 Turn the ignition switch OFF 12 Disconnect ECM connector A 31P 13 Check for continuity between ECM connector terminal A7 and body ground ECM CONNECTOR A 31P CKP BLU im 1819 20 27 28 29 0 Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM 7 and the CKP sensor ili NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E 11 79
83. Y HEATED OXYGEN SENSOR SECONDARY 25 SENSOR 2 Troubleshooting page 11 65 Replacement page 11 113 11 49 PGM FI System Component Location Index cont d INJECTORS Replacement page 11 111 11 50 DATA LINK CONNECTOR DLC General Troubleshooting Information page 11 3 PGM FI MAIN RELAY 1 Troubleshooting page 11 97 ENGINE CONTROL MODULE General Troubleshooting Information page 11 3 roubleshooting page 11 96 11 51 PGM FI System DTC Troubleshooting DTC P0107 MAP Sensor Circuit Low Voltage 1 Turn the ignition switch ON il 2 Check the MAP with the scan tool Is about 101 kPa 760 mmHg 30 in Hg or 2 9 V indicated YES Intermittent failure system is OK at this time Check for poor connections or loose terminals at the MAP sensor and at the NO Go to step 3 3 Turn the ignition switch OFF 4 Disconnect the MAP sensor 3P connector 5 Turn the ignition switch ON 11 6 Measure voltage between MAP sensor 3P connector terminals No 1 and No 3 MAP SENSOR 3P CONNECTOR vcci YEL RED 561 GRN WHT Wire side of female terminals Is there about 5 V YES Go to step 8 NO Go to step 7 7 Measure voltage between ECM connector terminals A11 and A21 ECM CONNECTOR A 31P Vcc YEL RED 561 GRN WHT Wire side of female terminals 11 52 Is there about 5 V YES
84. age 11 152 FUEL FILL CAP FUEL TANK Replacement page 11 155 FUEL RAIL x See cri er FUEL TUBE QUICK CONNECT FITTINGS 5 2 Precautions page 11 148 5 Removal page 11 149 Installation page 11 150 FUEL FEED LINE FUEL VAPOR LINE FUEL PULSATION DAMPER Replacement page 11 154 PGM FI MAIN RELAY 1 PGM FI MAIN RELAY 2 Troubleshooting page 11 141 11 140 x b Fuel Pump Circuit Troubleshooting If you suspect a problem with the fuel pump check that the fuel pump actually runs when it is on you will hear some noise if you listen to the fuel fill port with the fuel fill cap removed The fuel pump should run for 2 seconds when the ignition switch is first turned on If the fuel pump does not make noise check as follows 1 Turn the ignition switch OFF 2 Remove the glove box see page 20 63 then remove the PGM FI main relay 2 A 3 Turn the ignition switch ON Il 4 Measure voltage between PGM FI main relay 25 connector terminal No 5 and body ground PGM FI MAIN RELAY 2 5P CONNECTOR IGP1 YEL BLK Wire side of female terminals Is there battery voltage YES Go to step 5 NO Repair open in the wire between the PGM FI main relay 1 and the PGM FI main relay 2 8 P 5 Measure voltage between PGM FI main relay 2 5P connector terminal No 1 and body ground PGM FI MAIN RELAY 2 5P CONNECTOR Wire side of female terminals Is there batte
85. and the secondary HO2S Sensor 2 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 69 PGM FI System DTC Troubleshooting cont d DTC P0171 Fuel System Too Lean DTC P0172 Fuel System Too Rich NOTE If some of the DTCs listed below are stored at the same time as DTC P0171 and or P0172 troubleshoot those DTCs first then recheck for P0171 and or P0172 P0107 P0108 P1128 P1129 Manifold absolute pressure MAP sensor P1162 P1166 P1167 A F sensor Sensor 1 heater P0137 P0138 Secondary HO2S Sensor 2 P0141 Secondary HO2S Sensor 2 heater P1259 VTEC system 1 Check the fuel pressure see page 11 145 Is fuel pressure OK YES Go to step 2 NO Check these items If the pressure is too high replace the fuel pressure regulator see page 11 152 f the pressure is too low check the fuel pump the fuel feed pipe the fuel filter and replace the fuel pressure regulator see page 11 152 2 Startthe engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 11 70 3 Turn the ignition switch OFF 4 With a vacuum pump apply vacuum to the evaporative emission EVAP canister purge valve A from the evaporative emission EVAP canister side Does it hold vacuum YES Che
86. battery voltage YES Go to step 14 Go to step 10 cont d 11 123 VTEC VTC DTC Troubleshooting cont d 10 Measure voltage between ECM connector terminal B9 and body ground ECM CONNECTOR B 24 VTPSW BLU BLK Wire side of female terminals Is there battery voltage YES Repair open in the wire between the VTEC oil pressure switch and the ECM B9 NO Go to step 11 11 Turn the ignition switch OFF 12 Disconnect connector B 24P 13 Check for continuity between ECM connector terminal B9 and body ground ECM CONNECTOR B 24P VTPSW BLU BLK Wire side of female terminals Is there continuity YES Repair short in the wire between the VTEC oil pressure switch and the ECM B9 NO Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 if the symptom indication goes away with a known good ECM replace the original 11 124 14 Measure voltage between VTEC oil pressure switch 2P connector terminals No 1 and No 2 VTEC OIL PRESSURE SWITCH 2P CONNECTOR VTPSW BLU BLK LG1 BRN YEL Wire side of female terminals Is there battery voltage YES Go to step 15 NO Repair open in the wire between the VTEC oil pressure switch and G101 m 15 Turn the ignition switch OFF 16 Disconnect the VTEC solenoid valve 2P con
87. cation goes away with a known good ECM replace the original 26 Remove the PGM FI main relay 2 A 11 100 27 Check for continuity between ECM connector terminal E9 and body ground ECM CONNECTOR E 31 161 9 YEL BLK Wire side of female terminals Is there continuity YES Repair short in the wire between the No 17 FUEL PUMP 15A fuse and the ECM E9 or between the No 17 FUEL PUMP 15 A fuse and the PGM FI main relay 2 Also replace the No 17 FUEL PUMP 15A fuse IM NO Go to step 28 28 Remove the rear seat cushion see page 20 80 29 Remove the access panel from the floor 30 Disconnect the fuel pump 5P connector P 31 Check for continuity between fuel pump 5P 33 Check for continuity between fuel pump 5P connector terminal No 5 and body ground connector terminal No 5 and body ground FUEL PUMP 5P CONNECTOR FUEL PUMP 5P CONNECTOR FUEL PUMP YEL GRN Wire side of female terminals Wire side of female terminals Is there continuity Is there continuity YES Replace the PGM FI main relay 2 Also replace the No 17 FUEL PUMP 15A fuse YES Repair short in the wire between the fuel pump and the PGM FI main relay 2 Also replace NO Check the fuel pump and replace it if the No 17 FUEL PUMP 15A fuse necessary Also replace the No 17 FUEL PUMP 15A fuse NO Go to step 32 34 Disconnect ECM connector E 3
88. check for a blown MIL bulb If the wires and the bulb are OK YES Repair short in the wire between the No 6 replace the gauge assembly ECU ECM 15A fuse and the PGM FI main relay 1 Also replace the No 6 ECU ECM 15A fuse 8i 14 Turn the ignition switch OFF NO Go to step 19 15 Inspect the No 6 ECU ECMI 15A fuse in the under hood fuse relay box Is the fuse OK YES Go to step 22 NO Go to step 16 11 98 19 Disconnect each of the components or the 20 connectors below one at a time and check for continuity between PGM FI main relay 1 4P connector terminal No 1 and body ground PGM FI main relay 2 ECM connector 31 Each injector 2P connector Idle air control IAC valve connector Camshaft Position CMP sensor B Top dead center TDC sensor 3P connector Crankshaft position CKP sensor 3P connector MAIN RELAY 1 4P CONNECTOR Z IGP1 YEL BLK Wire side of female terminals Is there continuity YES Go to step 20 NO Replace the component that made continuity to body ground go away when disconnected If the item is the ECM update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM Also replace the No 6 ECU ECM 15 A fuse Disconnect the connectors of all these components
89. checking the idle speed check these items The malfunction indicator lamp MIL has not been reported on Ignition timing Spark plugs Air cleaner PCV system Pull the parking brake lever up Start the engine and make sure the headlights are off 1 Disconnect the evaporative emission EVAP canister purge valve 2P connector 2 Connect a tachometer A to the test tachometer connector B or connect the Honda PGM Tester C or an OBD II scan tool to the data link connector DLC D located under the driver s side of the dashboard 11 138 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle Checkthe idle speed with no load conditions headlights blower fan radiator fan and air conditioner off Idle speed should be 750 50 rpm Letthe engine idle for 1 minute with the heater fan switch on and air conditioner on then check the idle speed idle speed should be 750 50 rpm NOTE If the idle speed is not within specification go to the Symptom Troubleshooting Index Reconnect the EVAP canister purge valve 2P connector o ECM Idle Learn Procedure The idle learn procedure must be done so the ECM can learn the engine idle characteristics Do the idle learn procedure whenever you do any of these actions Disconnect the battery Replace the ECM or disconnect its connector Resetthe ECM
90. ck for poor connections or loose terminals at the A F sensor relay at the A F sensor Sensor 1 Is there continuity andatthe YES Replace the A F sensor Sensor 1 W 3 Turn the ignition switch OFF NO Repair open in the wire between the A F 4 Disconnect the A F sensor 4P connector and ECM sensor Sensor 1 and the ECM or A16 8 connector A 31P e 5 Connect the A F sensor Sensor 1 4P connector terminals No 2 and No 1 with a jumper wire SENSOR SENSOR 1 4P CONNECTOR JUMPER WIRE Wire side of female terminals 11 91 PGM FI System DTC Troubleshooting cont d DTC P1297 ELD Circuit Low Voltage 1 Reset the ECM see page 11 4 2 Start the engine 3 Turn on the headlights Is DTC P1297 indicated YES Go to step 4 NO intermittent failure system is OK at this time Check for poor connections or loose terminals at the ELD and at the 4 Turn the ignition switch and the headlights OFF 5 Disconnect the ELD 3P connector 6 Turn the ignition switch ON II 7 Measure voltage between body ground and ELD 3P connector terminal No 3 ELD 3P CONNECTOR ELD GRN RED Wire side of female terminals Is there about 5 V YES Replace the ELD m NO Goto step 8 11 92 8 Turn the ignition switch OFF 9 Disconnect ECM connector E 31P 10 Check for continuity between body ground and ECM connector terminal E15 E
91. ck the engine valve clearances and adjust if necessary If the valve clearances are OK replace the injectors see page 11 111 NO Replace the EVAP canister purge valve 14 DTC P0300 Random Misfire and Any Combination of the Following DTC P0301 No 1 Cylinder Misfire DTC P0302 No 2 Cylinder Misfire DTC P0303 No 3 Cylinder Misfire DTC P0304 No 4 Cylinder Misfire NOTE If the misfiring is frequent enough to trigger detection of increased emissions during two consecutive driving cycles the MIL will come on and DTC P0300 and some combination of P0301 through P0304 will be stored If the misfiring is frequent enough to damage the catalyst the MIL will blink whenever the misfiring occurs and DTC P0300 and some combination of P0301 through P0304 will be stored When the misfiring stops the MIL will remain on 1 Troubleshoot the following DTCs first if any of them were stored along with the random misfire DTC s P0107 P0108 P1128 P1129 Manifold absolute pressure MAP sensor P0171 P0172 Fuel system P0335 P0336 Crankshaft position CKP sensor P0505 Idle control system P1149 P1162 P1163 P1164 P1165 Air fuel ratio A F sensor P1259 VTEC system P1361 P1362 Camshaft position CMP sensor B Top dead center TDC sensor P1519 Idle air control IAC valve 2 Test drive the vehicle to verify the symptom 3 Find the symptom in the chart below and do the related procedures in
92. connector lt 24 Check for continuity between EVAP canister vent Canister System Leak Test shut valve 2P connector terminal No 2 and body ground 27 Turn the ignition switch OFF EMEN 28 Connect two three way T fittings A into the hose from the EVAP canister to the EVAP two way valve Connect the FTP sensor to one of the T fittings and 1 2 the vacuum pump to the other C Wire side of female terminals Is there continuity YES Go to step 25 NO Repair open in the wire between the EVAP canister vent shut valve and the ECM E21 8 25 Turn the ignition switch ON ID A973X 041 XXXXX 26 Measure voltage between EVAP canister vent shut valve 2P connector terminal No 1 and body ground 29 Remove the vent hose from the EVAP canister vent shut valve A and cap the port B to seal the fresh EVAF CANISTER VENT SHUT air vent of the EVAP canister 30 Turn the ignition switch ON II Is there battery voltage YES Replace the EVAP canister vent shut valve A and the o ring I NO Repair open in the wire between the EVAP canister vent shut valve and the No 4 ACG 10A fuse cont d 11 183 EVAP System DTC Troubleshooting cont d 31 While monitoring FTP sensor voltage with the 37 While monitoring FTP sensor voltage with the Honda PGM Tester or measuring voltage between Honda PGM Tester or measuring voltage between ECM connector
93. d ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM I NO Repair open in the wire between the ECM A10 B8 and the ECT sensor B 11 59 PGM FI System DTC Troubleshooting cont d DTC P0122 TP Sensor Circuit Low Voltage 1 Turn the ignition switch ON II 2 Check the throttle position with the scan tool Is there about 10 or 0 5 V when the throttle is fully closed and about 90 or 4 5 V when the throttle is fully opened YES Intermittent failure system is OK at this time Check for poor connections or loose terminals at the TP sensor and at the NO Go to step 3 3 Turn the ignition switch OFF 4 Disconnect the TP sensor 3P connector 5 Turn the ignition switch ON 1 6 Measure voltage between the TP sensor 3P connector terminals No 1 and No 3 TP SENSOR 3P CONNECTOR vcc2 562 GRN YEL YEL BLU Wire side of female terminals Is there about 5 V YES to step 7 Go to step 14 7 Turn the ignition switch OFF 11 60 8 Atthe sensor side measure resistance between the TP sensor 3P connector terminals No 1 and No 2 with the throttle fully closed TP SENSOR CONNECTOR 562 Q TPS Terminal side of male terminals Is there about 0 5 0 9 kQ YES Go to step 9 NO Replace the throttle body the TP sensor is not available separately
94. dicated YES Intermittent failure system is OK at this time Check the thermostat and the cooling system lii NO Check the thermostat and the cooling system If they are OK replace the ECT sensor 11 57 PGM FI System DTC Troubleshooting cont d DTC P0117 ECT Sensor Circuit Low Voltage 1 2 Turn the ignition switch ON il Check the ECT with the scan tool 15 150 C 302 F or higher or H Limit in Honda mode of PGM Tester or 0 V indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the ECT sensor and at the Disconnect the ECT sensor 2P connector Check the ECT with the scan tool 18 150 C 302 F or higher or H Limit in Honda mode of PGM Tester or 0 V indicated YES Go to step 5 NO Replace the ECT sensor Turn the ignition switch OFF Disconnect ECM connector B 24P 11 58 7 Check for continuity between the ECT sensor 2P connector terminal No 1 and body ground ECT SENSOR 2P CONNECTOR ECT RED WHT Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM B8 and the ECT sensor NO Update the if it does not have the latest Software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original w
95. diness code is incomplete repeat steps 2 through 5 8 11 167 PCV System DTC Troubleshooting DTC P1505 PCV Air Leakage 1 Reset the ECM see page 11 4 2 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 3 Let the engine idle for at least 40 seconds with the throttle fully closed 4 Check for a DTC P1505 with the scan tool Is DTC P1505 indicated YES Check these parts for vacuum leaks lii PCV valve PCV hose EVAP canister purge valve Throttle body Brake booster hose NO Intermittent failure system is OK at this time E 11 168 b lt PCV Valve Inspection and Test PCV Valve Replacement 1 Check the PCV valve A hoses B and 1 Disconnect the PCV hose connections for leaks or restrictions 2 Remove the PCV valve A Cien 44 2 At idle make sure there is a clicking sound from the 4 5 kgf m 33 Ibf ft PCV valve when the hose between the PCV valve and intake manifold is lightly pinched A with your 3 Install the parts in the reverse order of removal fingers or pliers with a new gasket B If there is no clicking sound check the PCV valve grommet for cracks or damage If the grommet is OK replace the PCV valve and recheck 11 169 EVAP System Component Location index 11 170 EVAPORATIVE EMISSION CANISTER PURGE VALV
96. due to poor contact at the ignition coil connectors no misfire at this time Make sure the coil connections are secure 11 72 10 11 12 13 14 15 Determine which cylinder s had the misfire Does the misfire occur in the cylinder where the ignition coil was exchanged YES Replace the faulty ignition coil NO Go to step 8 Turn the ignition switch OFF Exchange the spark plug from the problem cylinder with one from another cylinder Test drive the vehicle for several minutes in the range of the freeze data or under various conditions if there was no freeze data Check for a DTC or Temporary DTC with the scan Tool Is DTC or Temporary DTC P0301 P0302 P0303 or P0304 indicated YES Go to step 12 NO Intermittent misfire due to spark plug fouling etc no misfire at this time Ii Determine which cylinder s had the misfire Does the misfire occur in the cylinder where the spark plug was exchanged YES Repilace the faulty spark plug Goto step 13 Turn the ignition switch OFF Exchange the injector from the problem cylinder with one from another cylinder Let the engine idle for 2 minutes v 4 wi 16 Test drive the vehicle for several minutes in the range of the freeze data or under various conditions if there was no freeze data 17 Check for a DTC or a Temporary DTC with the scan Tool 15 DTC or Temporary DTC P0301 P0302 P030
97. e duration at various engine speeds and manifold pressures The basic discharge duration after being read out from the memory is further modified by signals sent from various sensors to obtain the final discharge duration By monitoring long term fuel trim the ECM detects long term malfunctions in the fuel system and sets a Diagnostic Trouble Code DTC Intake Air Temperature Sensor The IAT sensor is a temperature dependent resistor thermistor The resistance of the thermistor decreases as the intake air temperature increases TERMINAL THERMISTOR Knock Sensor The knock control system adjusts the ignition timing to minimize knock Malfunction Indicator Lamp MIL indication In relation to Readiness Codes The vehicle has certain readiness codes that are part of the on board diagnostics for the emissions systems If the vehicle s battery has been disconnected or gone dead if the DTCs have been cleared or if the ECM has been reset these codes are set to incomplete In some states part of the emissions testing is to make sure these codes are set to complete If all of them are not set to complete the vehicle may fail the test and the test cannot be finished To check if the readiness codes are set to complete turn the ignition switch ON 11 but do not start the engine The MIL will come on for 15 20 seconds If it then goes off the readiness codes are set to complete If it blinks several times
98. e see page 11 144 2 Disconnect the connectors from the injectors A disconnect the ground cable B and remove the bracket C 22 N m 2 2 kgf m 16 Ibf ft 3 Disconnect the quick connect fittings D 4 Remove the fuel rail mounting nuts E from the fuel rail F then remove the fuel rail and injectors as an assembly 5 Remove the injector clip G from the injector 6 Remove the injector from the fuel rail 11 111 PGM FI System Injector Replacement cont d 7 Coat the new o rings A with clean engine oil and insert the injectors B into the fuel rail C 8 Install the injector clip D 9 Coat the injector o rings E with clean engine oil 10 Install the injectors into the fuel rail then install the fuel rail into the intake manifold G 11 Install the fuel rail mounting nuts ground cable and bracket 12 Connect the connectors to the injectors 13 Connect the quick connect fittings 14 Turn the ignition switch ON II but do not operate the starter After the fuel pump runs for about 2 seconds the fuel pressure in the fuel line rises Repeat this two or three times then check for fuel leakage 11 112 lt A F Sensor Replacement Secondary HO2S Replacement Special Tools Required Special Tools Required O2 sensor wrench Snap on YA8875 SP Tools 93750 O2 sensor wrench Snap on YA8875 SP T
99. e 11 122 P0420 67 P0420 71 Catalyst System Efficiency Below Threshold see page 11 167 P0451 91 P0451 i Fuel Tank Pressure FTP Sensor Range Performance see page 11 171 Problem L P0452 91 P0452 Fuel Tank Pressure FTP Sensor Circuit Low Voltage see page 11 172 P0453 91 P0453 FuelTank Pressure FTP Sensor Circuit High Voltage see page 11 173 P0500 17 Vehicle Speed Sensor VSS Circuit Malfunction see page 11 80 P0505 14 0 505_ _ Idle Control System Malfunction see page 11 130 P0563 34 BUE Engine Control Module ECM Power Source Circuit see page 11 81 Unexpected Voltage ore P0600 39 oe Serial Communication Link Malfunction Refer to the Multiplex Control System Troubleshooting see page 22 172 P1106 13 P1106 Barometric Pressure BARO Sensor Range see page 11 83 ake Performance Problem FT P1107 13 Barometric Pressure BARO Sensor Circuit Low see page 11 83 EE Voltage 1108 13 Barometric Pressure BARO Sensor Circuit High see page 11 83 Voltage PME S P1121 7 P1121 Throttle Position TP Sensor Signal Lower Than see page 11 63 Expected _ P1122 7 P1122 Throttle Position TP Sensor Signal Higher Than see page 11 63 Expected MM P1128 5 P1128 Manifold Absolute Pressure MAP Sensor Signal see page 11 54 oe _Lower Than Expected E P1129 5 P1129 1 Manifold Absolute Pressure MAP Sensor Signal see page 11 54 Hig
100. e fuel pipe cover A Disconnect the fuel vapor hose and quick connect fittings Disconnect the hoses Slide back the clamps B then twist the hoses as you pull to avoid damaging them N 3 9 kgf m 28 Ibf ft 5 Place a jack or other support under the tank 6 Remove the strap bolts and let the strap C hang free 7 Remove the fuel tank D If it sticks to the undercoat on its mount carefully pry it off the mount b o 8 Install the parts in the reverse order of removal 11 155 Fuel Supply System Fuel Gauge Sending Unit Test Special Tools Required Fuel sender wrench 07XAA 001010A NOTE For the fuel gauge system circuit diagram refer to the Gauges Circuit Diagram see page 22 58 1 Check the No 10 METER 7 5A fuse in the under dash fuse relay box before testing 2 Dothe gauge drive circuit check see page 22 56 If the fuel gauge needle sweeps from minimum to maximum position and then returns to the minimum position the gauge is OK Go to step 3 If the fuel gauge needle does not sweep from minimum to maximum position position and then return to the minimum position replace the gauge assembly and retest 3 Turn the ignition switch OFF 4 Remove the rear seat cushion see page 20 80 5 Remove the access panel A from the floor 6 Disconnect the fuel pump 5P connector B 11 156 7 Measure voltage between fuel pump 5P connector terminals No 1 and No 2 with the igniti
101. eck for continuity between ECM connector Is there battery voltage terminal A12 and body ground YES Update the ECM if it does not have the latest software or substitute a known good ECM then ECM CONNECTOR 31 recheck see page 11 6 if the symptom indication goes away with a known good ECM replace the original ECM m 4 NO Replace the IAC valve Wire side of female terminals Is there continuity YES Go to step 13 NO Repair open in the wire between the IAC valve and the ECM A12 E 13 Reconnect the IAC valve 3P connector 14 Turn the ignition switch ON II 26 11 132 P A c Signal Circuit Troubleshooting 1 Turn the ignition switch ON Il 6 Momentarily connect under hood fuse relay box 14 connector terminal No 10 to body ground with 2 Momentarily connect ECM connector terminals A24 a jumper wire several times and E18 with a jumper wire several times UNDER HOOD FUSE RELAY BOX CONNECTOR 31 14 CONNECTOR ACC RED JUMPER WIRE Wire side of female terminals Wire side of female terminals Is there a clicking noise from the A C compressor Is there a clicking noise from the A C compressor clutch clutch YES Repair open in the wire between the ECM YES Go to step 3 E18 and the clutch relay NO Go to step 6 NO Check the A C system for other symptoms 8 3 Start the eng
102. el tank vapor control valve test see page 11 187 Is the fuel tank vapor control valve OK YES Go to step 31 NO Replace the fuel tank vapor control valve W Tighten the fuel cap 3 clicks then monitor the FTP sensor readings with the Honda PGM Tester Start the engine and let it idle for 5 minutes Check the FTP sensor readings Is the reading above 0 5 kpa 4 mm Hg 0 16 in Hg pressure or about 3 V YES Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E NO Check the following parts for leaks Fuel tank A Fuel fill cap B Fuel fill pipe C Fuel tank vapor control valve D Fuel tank vapor recirculation valve E Fuel tank vapor recirculation tube F Fuel tank vapor signal tube G Fuel tank vapor control vent tube H FTP sensor J Repair or replace any leaking parts 11 179 EVAP System DTC Troubleshooting cont d DTC P1457 EVAP Control System Leakage EVAP Canister System The fuel system is designed to allow specified maximum vacuum and pressure conditions Do not deviate from the vacuum and pressure tests as indicated in these procedures Excessive pressure vacuum would damage the EVAP components or cause eventual fuel tank system failure Special Tools Required Vacuum pump gauge 0 30
103. embly A remove the old retainer from the mating line lt 4 Align the quick connect fittings with the line 5 Make sure the connection is secure and that the and align the retainer B locking pawls with the pawls are firmly locked into place check visually connector C grooves Then press the quick and by pulling the connector connect fittings onto the line until both retainer pawls lock with a clicking sound NOTE If itis hard to connect put a small amount of new engine oil on the line end Connection with new retainer 6 Reconnect the negative cable to the battery and turn the ignition switch ON II The fuel pump will run for about 2 seconds and fuel pressure will rise Repeat 2 or 3 times and check that there are no fuel leaks b o Reconnection to existing retainer 11 151 Fuel Supply System Fuel Pressure Regulator Fuel Filter Replacement Replacement The fuel filter should be replaced whenever the fuel pressure drops below the specified value 270 320 kPa 1 Remove the fuel pump see page 11 153 2 8 3 3 kgf cm 40 47 psi after making sure that the fuel pump and the fuel pressure regulator are OK 2 Remove the fuel pressure regulator A 1 Remove the fuel pump see page 11 153 2 Remove the fuel filter A Ce 3 Install the part in the reverse order of removal with a new o ring B 3 Install in the reverse order of
104. es and fuel filter for damage leaks and deterioration Replace any damaged parts Make sure the connection is secure and the quick connect fitting cover is firmly locked into place 11 146 Check all clamps and retighten if necessary A Do not disconnect the hose from the line at these joints E To FUEL PULSATION DAMPER To EVAPORATIVE EMISSION EVAP CANISTER PURGE VALVE BASE GASKET 7 Replace Set the bolt flange the mark B There should be no Clearance mark Set this part s on the mark 40 t Clamp in the middle Clamp in the middle D P should be no E clearance When installing 90 the fuel fill tube align the marks Dey on the tube and p the line NOS 90 There should be no clearance mark Fuel Supply System Fuel Line Quick Connect Fittings Precaution The fuel tube quick connect fittings connect the fuel rail A to fuel feed hose B the fuel feed hose B to the fuel tine C and the fuel tube D to the fuel pump assembly E When removing or installing the fuel feed hose fuel pump assembly or fuel tank it is necessary to disconnect or connect the quick connect fittings Pay attention to the following The fuel feed hose B fuel tube D and quick connect fittings F are not heat resistant be careful not to damage them during welding or other heat generating proced
105. essed down and alternately pull and push the connector until it comes off easily Do not remove the retainer from the line once removed the retainer must be replaced with a new one 11 After disconnecting the quick connect fitting check it for dirt or damage see page 11 149 b Fuel Pressure Test Special Tools Required Fuel pressure gauge 07406 004000A Fuel pressure gauge set 07ZAJ S5A0100 1 Relieve the fuel pressure see page 11 144 2 Disconnect the quick connect fitting A Attach the fuel pressure gauge set and fuel pressure gauge 07406 004000A 07ZAJ S5A0100 3 Start the engine and let it idle If the engine starts go to step 5 If the engine does not start go to step 4 4 Check to see if the fuel pump is running listen to the fuel fill port with the fuel fill cap removed The fuel pump should run for 2 seconds when the ignition switch is first turned on Ifthe pump runs go to step 5 If the pump does not run do the fuel pump circuit troubleshooting see page 11 141 5 Read the pressure gauge The pressure should be 320 370 3 3 3 8 kgf cm 47 52 psi If the pressure is OK the test is complete If the pressure is out of specification replace the fuel pressure regulator and the fuel filter see page 11 152 then recheck the fuel pressure 11 145 Fuel Supply System Fuel Line Inspection Check the fuel system lines hos
106. est the PGM FI main relay 1 see page 22 51 If the relay is OK update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repair open in the wire between the PGM FI main relay 1 and the ECM E7 e 11 102 42 Reconnect ECM connector E 31 48 Measure voltage between main relay 1 4P connector terminal No 2 and body around 43 Turn the ignition switch ON 11 PGM FI MAIN RELAY 1 4P CONNECTOR 44 Measure voltage between body ground and ECM connector terminals A2 and A3 individually ECM CONNECTOR A 31P IGP2 YEL BLK IGP1 YEL BLK WHT BLK Wire side of female terminals Is there battery voltage Wire side of female terminals YES Go to step 49 Is there battery voltage NO Repair open in the wire between the No 6 ECU 15A fuse and the PGM FI main YES Go to step 51 relay 1 8 o NO Go to step 45 49 Turn the ignition switch OFF 45 Turn the ignition switch OFF 50 Check for continuity between PGM FI main relay 1 4P connector terminal No 1 and ECM connector 46 Remove the PGM FI main relay 1 A terminals A2 and A3 individually PGM FI MAIN RELAY 1 4P CONNECTOR y IGP1 YEL BLK 5 13 2 g 254 IGP2 YEL BLK IGP1 YEL BLK Wire side of female te
107. et to available because the fuel system is continuously monitored during closed loop operation Monitoring pauses when the catalytic converter EVAP control system and A F sensor monitors are active Monitoring also pauses when any related enable criteria are not being met Monitoring resumes when the enable criteria is again being met Comprehensive Component Monitor and Readiness Code This readiness code is always set to available because the comprehensive component monitor is continuously running whenever the engine is cranking or running 11 48 w w PGM FI System E e Component Location Index CAMSHAFT POSITION SENSOR B TOP DEAD CENTER TDC SENSOR Troubleshooting page 11 95 Replacement page 11 114 ELECTRICAL LOAD DETECTOR ELD Troubleshooting page 11 92 INTAKE AIR TEMPERATURE IAT SENSOR Troubleshooting page 11 55 Replacement page 11 115 ENGINE COOLANT TEMPERATURE ECT SENSOR Troubleshooting page 11 57 Replacement page 11 114 MANIFOLD ABSOLUTE PRESSURE MAP SENSOR Troubleshooting page 11 52 THROTTLE POSITION TP SENSOR CRANKSHAFT POSITION Troubleshooting page 11 60 CKP SENSOR KNOCK SENSOR Troubleshooting page 11 78 Troubleshooting page 11 77 Replacement page 11 116 Replacement page 11 115 AIR FUEL RATIO A F SENSOR SENSOR 1 Troubleshooting page 11 84 Replacement page 11 113 SECONDAR
108. eze fuel pump fuel filter fuel feed line the retainer tabs B with the other hand to release them from the locking paws C Pull the connector off NOTE Becareful not to damage the line D or other parts Do not use tools Ifthe connector does not move keep the retainer tabs pressed down and alternately pull and push the connector until it comes off easily Do not remove the retainer from the line once removed the retainer must be replaced with a new one 5 To prevent damaged and keep foreign matter out cover the disconnected connector and line end with plastic bags A NOTE The retainer cannot be reused once it has been removed from the line Replaced the retainer when replacing the fuel rail replacing the fuel feed line replacing the fuel pump replacing the fuel filter replacing the fuel gauge sending unit ithas been removed from the line itis damaged Fuel Supply System Fuel Line Quick Connect Fittings Installation 1 Check the contact area A of the line B for dirt and damage and clean if necessary 2 Insert a new retainer A into the connector B if the retainer is damaged or after replacing the fuel rail replacing the fuel feed line replacing the fuel pump replacing the fuel filter replacing the fuel gauge sending unit removing the retainer from the line 11 150 3 Before connecting a new fuel tube quick connect fitting ass
109. ft Position CMP Sensor B TDC Sensor Intermittent Interruption DTC P1362 Camshaft Position CMP Sensor B TDC Sensor No Signal 1 Reset the ECM see page 11 4 2 Startthe engine Is DTC P1361 and or P1362 indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the CMP sensor sensor and at the ECM m 3 Turn the ignition switch OFF 4 Disconnect the CMP sensor B TDC sensor 3P connector 5 Turn the ignition switch ON Il o 6 Measure voltage between CMP sensor B TDC sensor 3P connector terminal No 3 and body ground CMP SENSOR B TDC SENSOR 3P CONNECTOR Wire side of female terminals Is there battery voltage YES Go to step 7 NO Repair open in the wire between the PGM FI main relay 1 and the CMP sensor B sensor W lt 7 Measure voltage between CMP sensor B TDC sensor 3P connector terminal No 1 and body ground CMP SENSOR B TDC SENSOR 3P CONNECTOR 213 TDC GRN i Wire side of female terminals Is there about 5 V YES Go to step 8 NO Go to step 10 8 Measure voltage between CMP sensor B TDC sensor 3P connector terminals No 2 and No 3 CMP SENSOR SENSOR CONNECTOR 161 IBRN YEL L Wire side of female terminals Is there battery voltage YES Go to step 9 NO Repair open in the wire between the CMP
110. gnition switch ON II 11 184 43 While monitoring FTP sensor voltage with the Honda PGM Tester or measuring voltage between ECM connector terminals E4 and E14 slowly pump the vacuum pump ECM CONNECTOR E 31P 563 FTP LT GRN Wire side of female terminals 44 Continue to pump vacuum until the voltage drops to about 1 5V Make sure the engine coolant temperature is still above 95 F 35 C and your vacuum pump has no leak o 45 Monitor the voltage continuously for 20 seconds Does the voltage drop to 1 5 V and hold for at least 20 seconds YES Inspect the EVAP canister purge valve line and connections If they are OK perform the EVAP two way valve test see page 11 186 and the fuel tank vapor control valve test see page 11 187 NO Replace the EVAP canister see page 11 189 EVAP System EVAP Two Way Valve Test Special Tools Required Vacuum pump Gauge 0 30 in Hg A973X 041 XXXXX Vacuum Pressure Gauge 0 4 in Hg 07JAZ 001000B 1 Remove the fuel fill cap 2 Disconnect the vapor line from the EVAP two way valve A Connect it to a T fitting B from the vacuum gauge and the vacuum pump as shown 07JAZ 001000B 3 Apply vacuum slowly and continuously while watching the gauge The vacuum should stabilize momentarily at 0 8 2 1 kPa 6 16 mmHg 0 2 0 6 in Hg If the vacuum stabilizes valve opens below 0 8 kPa 6 mmHg
111. he reverse order of removal 11 115 PGM FI System CKP Sensor Replacement 1 Disconnect the CKP sensor 3P connector 2 Remove the CKP sensor A 12 N m 1 2 kgfm A 8 7 Ibf ft 3 Install the sensor in the reverse order of removal with a new o ring B 11 116 VTEC VTC Component Location Index VTC OIL CONTROL SOLENOID VALVE CAMSHAFT POSITION Troubleshooting page 11 118 CMP SENSOR A Test page 11 127 Troubleshooting page 11 121 Replacement page 11 128 VTC SOLENOID VALVE Troubleshooting page 11 123 Removal Inspection page 11 128 11 117 VTEC VTC DTC Troubleshooting DTC P0010 VTC Oil Control Solenoid Valve Malfunction 1 Reset the ECM see page 11 4 2 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle 3 Test drive at a steady speed between 20 40 mph 30 60 km h for 10 minutes Is DTC P0010 indicated YES Go to step 4 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the VTC oil contro solenoid valve and at the ECM E 4 Turn the ignition switch OFF 5 Disconnect the ECM connector B 24P 6 Measure resistance between ECM connector terminals B1 and B23 ECM CONNECTOR B 24P VTC BLU WHT Ak BLK WHT Wire side of female terminals Is there 6 75 8 25 Q YES Go to
112. heck the circuit w 11 158 Intake Air System Component Location Index INTAKE AIR BYPASS CONTROL THERMAL VALVE Test page 11 161 AIR CLEANER Replacement page 11 162 AIR CLEANER ELEMENT Replacement page 11 162 THROTTLE CABLE Adjustment page 11 163 THROTTLE BODY Removal Installation page 11 164 Test page 11 160 Removal Installation page 11 165 Disassembly Reassembly page 11 166 11 159 Intake Air System Throttle Body Test NOTE Do not adjustthe throttle stop screw It is preset at the factory If the malfunction indicator lamp MIL has been reported on check for diagnostic trouble codes DLCs see page 11 3 1 With the engine off check the throttle cable movement The cable should move without binding or sticking If the cable moves go to step 2 If the cable binds or sticks check it and its routing If the cable is faulty reroute it or replace it and adjust it see page 11 163 then go to step 2 Move the throttle lever by hand to see if the throttle valve and or shaft are too loose or too tight If there is excessive play in the throttle valve shaft or any binding in the throttle valve at the fully closed position replace the throttle body If the throttle valve and shaft are OK go to step 3 Connect the scan tool to the DLC Turn the ignition switch ON II Check the throttle position with the scan tool The reading sh
113. her Than Expected P1157 48 Air Fuel Ratio A F Sensor Sensor 1 Range see page 11 84 222222 Rerformance Problem P1158 48 PES Air Fuel Ratio A F Sensor Sensor 1 AFS Terminal see page 11 85 n Low Voltage 4 P1159 48 Air Fuel Ratio A F Sensor Sensor 1 AFS Terminal see page 11 86 Mur Low Voltage 20220 1163 61 1163 Air Fuel Ratio A F Sensor Sensor 1 Slow Response see page 11 88 P1164 61 P1164 Air Fuel Ratio A F Sensor Sensor 1 Range see page 11 88 Performance Problem ee E P1166 41 Air Fuel Ratio A F Sensor Sensor 1 Heater Circuit see page 11 89 M Malfunction i Aus P1167 41 x Air Fuel Ratio A F Sensor Sensor 1 Heater System see page 11 91 Malfunction These DTCs are indicated by a blinking MIL when the SCS service signal line is jumped with the Honda PGM Tester 1 02 model 11 8 P DTC Temporary DTC Detection Item MIL indication 1259 22 e VTEC System Malfunction see page 11 123 P1297 20 pem Electrical Load Detector ELD Circuit Low Voltage see page 11 92 P1298 20 Electrical Load Detector ELD Circuit High Voltage see page 11 93 P1361 8 E Camshaft Position CMP Sensor B Top Dead Center see page 11 95 TDC Sensor Intermittent Signal Interruption P1362 8 1 Camshaft Position CMP Sensor Top Dead Center see page 11 95 TDC Senso
114. ine 4 Turn the blower switch ON 5 Turn the A C switch ON Does the A C operate YES The air conditioning signal is OK NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E 11 133 Idle Control System Alternator FR Signal Circuit Troubleshooting 1 Disconnect the alternator 4P connector from the alternator 2 Turn the ignition switch ON II 3 Measure voltage between ECM connector terminals A24 and B13 ECM CONNECTORS 31 ALTF B 24 WHT RED 2131415 VAEA Wire side of female terminals Is there about 5 V YES Go to step 4 NO Go to step 13 4 Turn the ignition switch OFF 5 Reconnect the alternator 4P connector 6 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle 7 Measure voltage between ECM connector terminals A24 and B13 Does the voltage decrease when the headlights and rear window defogger are turned on YES The alternator FR signal is OK NO Go to step 8 8 Turn the ignition switch OFF 9 Disconnect ECM connector B 24P 10 Disconnect the alternator 4P connector 11 134 11 Connect alternator 4P connector terminal No 4 to body ground with a jumper wire ALTERNATOR
115. ing 11 114 11 115 11 116 11 117 11 118 11 127 11 128 11 128 Fuel Pressure Test 11 145 Fuel Lines Inspection 11 146 Fuel Line Quick Connect Fittings Precautions 11 148 Fuel Line Quick Connect Fittings Removal 11 149 Fuel Line Quick Connect Fittings Installation 11 150 Fuel Pressure Regulator Replacement 11 152 Fuel Filter Replacement 11 152 Fuel Pump Fuel Gauge Sending Unit Replacement 11 153 Fuel Pulsation Damper Replacement 11 154 Fuel Tank Replacement 11 155 Fuel Gauge Sending Unit Test 11 156 Low Fuel Indicator Test 11 158 Intake Air System Component Location Index 11 159 Throttle Body Test 11 160 Intake Air Bypass Control Thermal Valve Test 11 161 Air Cleaner Replacement 11 162 Air Cleaner Element Replacement 11 162 Throttle Cable Adjustment 11 163 Throttle Cable Removal Installation 11 164 Throttle Body Removal Installation 11 165 Throttle Body Disassembly Reassembly 11 166 Catalytic Converter System DTC Troubleshooting 11 167 PCV System DTC Troubleshooting 11 168 PCV Valve Inspection andTest 2
116. inuity between ECM connector terminal E5 and body ground ECM CONNECTOR E 31 VCC 3 YEL BLU 3 4 5 6 7 Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM E5 and the FTP sensor NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original lt 76 Turn the ignition switch OFF 77 Turn the ignition switch ON Il 78 Measure voltage between ECM connector terminal E29 and body ground ECM CONNECTOR E 31P 1 2 3 4 5 6 819 141516 18 120 21 22123124 26 2930 31 SCS BRN Wire side of female terminals Is there about 5 V or battery voltage YES Go to step 82 to step 79 79 Turn the ignition switch OFF 80 Disconnect ECM connector E 31 cont d 11 107 PGM FI System MIL Circuit Troubleshooting cont d 81 Check for continuity between ECM connector terminal E29 and body ground ECM CONNECTOR E 31P Wire side of female terminals Is there continuity YES Repair short in the wire between the data link connector DLC and the ECM E29 NO Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If
117. iptions cont d ECM Inputs and Outputs at Connector E 31P Wire side of female terminals NOTE Standard battery voltage is 12 V Terminal Wire color Terminal name Description Signal number i 1 GRN YEL IMO FPR IMMOBILIZER Drives PGM FI main relay2 0 V for 2 seconds after turning ignition switch ON FUEL PUMP RELAY M then battery voltage 2 WHT RED SHO2S SECONDARY Detects secondary HO2S With throttle fully opened from idle with fully HEATED OXYGEN SENSOR sensor 2 signal warmed up engine above 0 6 V SECONDARY 25 With throttle quickly closed below 0 4 V SENSOR 2 3 BRN YEL LG3 LOGIC GROUND Ground for the ECM PCM Less than 1 0 V at all times L contro circuit 51 4 563 SENSOR GROUND Sensor ground Less than 1 0 V at all times 5 YEL BLU VCC3 SENSOR VOLTAGE Provides sensor voltage With ignition switch ON II about 5 V With ignition switch OFF about 0 V 6 BLK WHT SO2SHTC SECONDARY Drives secondary HO2S With ignition switch ON II battery voltage HEATED OXYGEN SENSOR heater With fully warmed up engine running duty SECONDARY 25 controlled HEATER CONTROL 7 RED YEL MRLY PGM FI MAIN Drives PGM FI main relay 1 With ignition switch ON II about 0 V RELAY Power source for the DTC With ignition switch OFF battery voltage memory 8 ORN AFSHTCR AIR FUEL RATIO Drives air fuel ratio sensor With ignition switch ON Il
118. isconnected or when the ECM is cleared with the OBD II scan tool or Honda PGM Tester Low ambient temperatures or excessive stop and go traffic may increase the drive time needed to switch the readiness code from incomplete to complete The readiness code will not switch to complete until all the enable criteria are met If a fault in the secondary HO2S system caused the MIL to come on the readiness code cannot be set to complete until you correct the fault Enable Criteria ECT at 158 F 70 C or higher Intake air temperature IAT at 20 F 7 C or higher Vehicle speed is steady and vehicle speed sensor VSS reads more then 25 mph 13km h Procedure 1 Connect the scan tool to the vehicle s data link connector DLC and bring up the tool s generic OBD II mode 2 Start the engine 3 Test drive the vehicle under stop and go conditions with short periods of steady cruise After about 5 miles 3 km the readiness code should switch from incomplete to complete 4 If the readiness code is still set to incomplete check for a temporary DTC If there is no DTC one or more of the enable criter a were probably not met repeat the procedure 4 2 Evaporative Emissions EVAP Control System Monitor and Readiness code NOTE All readiness code are cleared when the battery is disconnected or when the ECM is cleared with the OBD Il scan tool or Honda PGM Tester The enable criteria must be
119. ition switch OFF 4 Disconnect the MAP sensor 3P connector 5 Connect MAP sensor 3P connector terminals No 2 and No 3 with a jumper wire MAP SENSOR 3P CONNECTOR M GRN RED SG1 GRN WHT JUMPER WIRE Wire side of female terminals 6 Turn the ignition switch ON 11 7 Check the MAP with the scan tool 1s about 101 kPa 760 mmHg 30 in Hg or higher or about 2 9 V or higher indicated YES Go to step 8 NO Replace the MAP sensor 8 Remove the jumper wire 9 10 11 12 13 lt Measure voltage between MAP sensor 3P connector terminals No 1 and No 3 MAP SENSOR 3P CONNECTOR VCC1 ZN YEL RED 3 TERN WHT v Wire side of female terminals Is there about 5 V YES Go to step 10 NO Repair open in the wire between the ECM A11 and the MAP sensor Turn the ignition switch OFF Connect ECM connector terminals A11 and A19 with a jumper wire ECM CONNECTOR 31P 19 20 21 27 28 9 30 GRN RED 561 GRN WHT JUMPER WIRE Wire side of female terminals Turn the ignition switch ON il Check the MAP with the scan tool Is about 101 kPa 760 mmHg 30 in Hg or higher or about 2 9 V or higher indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a k
120. lay box Is the fuse OK YES Repair open in the wire between the No 20 IG 40A Canada 50A fuse and the gauge assembly If the wire is OK test the ignition switch see page 22 53 NO Repair short in the wire between 20 IG 40A Canada 50A fuse and the under dash fuse relay box Also replace the No 20 IG 40A Canada 50A fuse iM cont d 11 97 PGM FI System MIL Circuit Troubleshooting cont d 10 Try to start the engine 16 Remove the blown No 6 ECU ECM 15A fuse from the under hood fuse relay box Does the engine start 17 Remove the glove box see page 20 63 and the YES Go to step 11 PGM FI main relay 1 NO Go to step 14 11 Turn the ignition switch OFF 12 Connect ECM connector terminal E31 to body ground with a jumper wire ECM CONNECTOR E 31P MIL 18 Check for continuity between body ground and MER GRN ORN PGM FI main relay 1 4P connector terminals No 2 and No 4 individually Wire side of female terminals A CONNECTOR 1 13 Turn the ignition switch ON Il 15 the MIL on YES Update the ECM if it does not have the latest Software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original I Wire side of female terminals for an open in the wire between the Is there continuity ECM E31 and the gauge assembly Also
121. ld be at least 2 8 mm 1 8 11 127 VTEC VTC CMP Sensor A Replacement VTEC Solenoid Valve Removal 8 Inspection 1 Remove the air cleaner see page 11 162 2 Disconnect the CMP sensor A 3P connector 1 Disconnect the VTEC solenoid valve 2P connector 3 Remove the CMP sensor A 2 Measure resistance between VTEC solenoid valve connector terminals No 1 and No 2 el x Resistance 14 30 Q G 4 A e TB m a 2 Nm 1 2 kgf m 8 7 Ibf ft 4 Install the sensor in the reverse order of removal with new o ring B 3 If the resistance is within specifications remove the VTEC solenoid valve assembly A from the e cylinder head and check the VTEC solenoid valve filter B for clogging If itis clogged replace the solenoid valve filter the engine oil filter and the engine oil 11 128 Idle Control System Component Location Index IDLE AIR CONTROL IAC VALVE Troubleshooting page 11 131 11 129 idle Control System DTC Troubleshooting DTC P0505 idle Control System Malfunction NOTE If DTC P1519 is stored at the same time as DTC P0505 troubleshoot DTC P1519 first then recheck for DTC P0505 1 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle 2 Check the engine speed at idle with no load conditions headlights
122. let it idle 3 Hold the engine at 3 000 4 000 rpm for at least 60 seconds Is DTC P0325 indicated YES Go to step 4 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the knock sensor and at the ECM I 4 Turn the ignition switch OFF 5 Disconnect the starter subharness 6P connector 6 Check for continuity between ECM connector terminal A9 and body ground ECM CONNECTOR A 31 KS RED BLU 1 2 3 4 5 6 7 9 10 11 12 1516 118 19 20 21 Q 22 23 24 25126 27 28 29 30 Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM 9 and the starter subharness connector IN NO Goto step 7 P 7 Connect starter subharness 6P connector terminal No 5to body ground with a jumper wire STARTER SUBHARNESS 6P CONNECTOR 3 6 KS JUMPER RED BLU WIRE Wire side of female terminals 8 Check for continuity between body ground and ECM connector terminal A9 ECM CONNECTOR A 31 KS RED Wire side of female terminals Is there continuity YES Go to step 9 NO Repair open in the wire between the ECM A9 and the starter subharness connector Check the starter subharness between the 6P connector and the knock sensor for an open or short If it S OK substitute a known good knock sensor and recheck Is DTC P0325 indicated
123. minals 7 Turn the ignition switch ON 1 EZ 8 Check the secondary HO2S Sensor 2 output DTC P0139 Secondary HO2S Sensor 2 Slow voltage with the scan tool Response Is there 1 0 V or more 1 Reset the ECM see page 11 4 YES Go to step 9 2 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan cornes on NO Replace the secondary HO2S Sensor 2 W 3 Check the secondary HO2S Sensor 2 output 9 Turn the ignition switch OFF voltage at 3 000 rpm with the scan tool 10 Connect ECM connector terminals E2 and E4 with a Is there 0 3 0 8 V for 2 minutes jumper wire YES Replace the secondary HO2S Sensor 2 ECM CONNECTOR E 31P NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at JUMPER WIRE the secondary HO2S Sensor 2 and at the SHO2S SG3 PNK WHT RED e Wire side of female terminals 11 Turn the ignition switch ON Il 12 Check the secondary HO2S Sensor 2 output voltage with the scan tool Is there 1 0 V or more YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Repair open in the wire between the ECM E2 E4 and the secondary HO2S Sensor 2 11 67 PGM FI System DTC Tr
124. minutes in the range of the freeze data or under various conditions if there was no freeze data Check for a DTC or Temporary DTC with the scan tool Is DTC or Temporary DTC P0301 P0302 P0303 or P0304 indicated YES Go to step 40 NO Intermittent misfire due to injector malfunction etc Make sure the injector connections are secure Check for poor connections or loose terminals at the injector connector ll Determine which cylinder s had the misfire Does the misfire occur in the cylinder where the injector was exchanged YES Replace the faulty injector lii NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original Turn the ignition switch OFF Remove the engine cover Disconnect the injector 2P connector from the problem cylinder Turn the ignition switch ON I cont d 11 75 PGM FI System DTC Troubleshooting cont d 45 Measure voltage between injector 2P connector terminal No 1 and body ground INJECTOR 2P CONNECTOR IGP YEL BLK Wire side of female terminals Is there battery voltage YES Go to step 46 NO Repair open in the wire between the injector and the PGM FI main relay 1 8 46 Turn the ignition switch OFF 47 Check for continuity between body ground and ECM connector terminal see table
125. nd E16 is there momentary battery voltage YES EPS signal is OK NO Go to step 10 6 Turn the ignition switch OFF 7 Disconnect the EPS control unit 20P connector 8 Turn the ignition switch ON Il cont d 11 135 Idle Control System Electrical Power Steering EPS Signal Circuit Troubleshooting cont d 9 Measure voltage between EPS control unit terminal No 17 and body ground EPS CONTROL UNIT 20P CONNECTOR EPSLD Wire side of female terminals Is there battery voltage YES Substitute a known good EPS control unit and recheck ii NO Repair open in the wire between the ECM E16 and the EPS control unit lii 10 Turn the ignition switch OFF 11 Disconnect the EPS control unit 20P connector 12 Turn the ignition switch ON ll 11 136 13 Measure voltage between EPS control unit terminal No 17 and the body ground EPS CONTROL UNIT 20P CONNECTOR Wire side of female terminals Is there battery voltage YES Substitute a known good EPS control unit and recheck NO Go to step 14 14 Turn the ignition switch OFF 15 Disconnect the ECM connector E 31P 16 Check for continuity between body ground and ECM connector terminal E16 ECM CONNECTOR E 31P LT GRN BLK Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM E16 and the EPS control unit IN NO
126. nection is secure and the connector K is firmly locked into the place When installing the fuel gauge sending unit make sure the connection is secure and the connector is firmly locked into place Be careful not to bend or twist the connector excessively When installing the fuel tank unit align the marks L on the fuel tank M and the fuel tank unit N 93 N m 19 5 kgf m 69 Ibf ft Fuel Supply System Fuel Pulsation Damper Replacement 1 2 3 Relieve the fuel pressure see page 11 144 Remove the engine cover Remove the fuel rail mounting nuts from the fuel rail Remove the ground cable 6101 Raise the fuel rail Place a wrench A on the fuel rail B Place a wrench C on the fuel pulsation damper D Remove the pulsation damper Install the fuel pulsation damper in the reverse order of removal with new washers NOTE Replace all washers whenever the fuel pulsation damper is loosened or removed If the drain hole A of the fuel pulsation damper cover does not face bottom reinstall it as shown 11 154 v 4 wid Fuel Tank Replacement 1 Relieve the fuel pressure see page 11 144 2 Drain the fuel tank Remove the fuel pump see page 11 153 Using a hand pump hose and container suitable for gasoline draw the fuel from the fuel tank 3 Jack up the vehicle and support it with safety stands 4 Remove th
127. nector 17 Check for resistance between VTEC solenoid valve 2P connector terminals No 1 and No 2 VTEC SOLENOID VALVE 2P CONNECTOR Terminal side of male terminals ts there 14 30 Q YES Go to step 18 NO Replace the VTEC solenoid valve see page 11 128 m 6 v0 18 Remove the VTEC oil pressure switch and install the special tools as shown then reinstall the VTEC oil pressure switch 07406 0020201 or d 07MAJ PY4011A and 07MAJ PY40120 2 2 kgf m 16 Ibf ft 07NAJ P07010A 07ZAJ S5AA200 19 Reconnect the VTEC solenoid valve 2P connector and VTEC oil pressure switch 2P connector 20 Connect a tachometer or OBD II scan tool Honda PGM Tester to the DLC 21 Start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 22 Check the oil pressure at engine speeds of 1 000 and 2 000 rpm Keep the measuring time as short as possible less than 1 minute because the engine is running with no load Is the oil pressure below 49 kPa 0 5 kgf cnf 7 psi YES Go to step 23 NO Inspect the VTEC solenoid valve see page 11 128 m 23 24 26 27 28 29 P Turn the ignition switch OFF Disconnect the VTEC solenoid valve 2P connector Attach the battery positive terminal to VTEC solenoid valve 2P connector terminal No 2 Start the engine then connect the battery negative terminal
128. nown good ECM replace the original l NO Repair open in the wire between the ECM A19 and the MAP sensor 11 53 PGM FI System DTC Troubleshooting cont d DTC P1128 MAP Sensor Signal Lower Than DTC P1129 MAP Sensor Signal Higher Than Expected Expected 1 Turn the ignition switch ON il 1 Startthe engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 2 Check the MAP with the scan tool then let it idle Is 54 1 kPa 406 mmHg 16 0 in Hg 1 6 V or 2 Check the MAP with the scan tool higher indicated 15 36 9 kPa 277 mmHg 10 9 in Hg 1 1 V or less YES Intermittent failure system is OK at this indicated time E YES Intermittent failure system is OK at this NO Replace the MAP sensor ili time m NO Replace the MAP sensor ii 11 54 DTC P0112 IAT Sensor Circuit Low Voltage 1 2 Turn the ignition switch ON II Check the IAT with the scan tool Is 302 F 150 C or higher or H Limit in Honda mode of PGM Tester or 0 V indicated YES Go to step 3 NO to step 8 Disconnect the IAT sensor 2P connector Check the IAT with the scan tool Is 302 F 150 C or higher or H Limit in Honda mode of PGM Tester or 0 V indicated YES Go to step 5 NO Replace the IAT Turn the ignition switch OFF Disconnect ECM connector B 24P Check for continuity between IAT sensor 2P connector te
129. nsor is a thermistor whose Same as ambient Temperature internal resistance changes with coolant temperature The temperature and IAT ECT ECM uses the voltage signals from the ECT sensor to With engine warmed determine the amount of injected fuel up about 176 212 F 80 100 C 0 5 0 8 V Air Fuel Ratio The A F sensor detects the oxygen content in the exhaust 0 0 1 25 V NO A F Sensor gas and sends voltage signals to the Based on these 8 0 11 0 mA PGM Sensor 1 signals the ECM controls the air fuel ratio When the Tester oxygen content is high that is when the ratio is leaner At idle speed than the stoichiometric ratio the voltage signal is lower about 0 1 0 9 V When the oxygen content is low that is when the ratio is richer than the stoichiometric ratio the voltage signal is higher The A F sensor signals are electrical current that are indicated as voltage on the scan tool Secondary The HO2S detects the oxygen content in the exhaust gas 0 0 1 25V NO Heated and sends voltage signals to the ECM Based on these At idle speed Oxygen signals the ECM controls the air fuel ratio When the about 0 1 0 9 V Sensor oxygen content is high that is when the ratio is leaner Secondary i than the stoichiometric ratio the voltage signal is lower HO2S j When the oxygen content is low that is when the ratio is Sensor2 richer than the stoichiometric ratio the voltage signal is higher c
130. ntrol When the ignition is turned on the ECM grounds the PGM FI main relay which feeds current to the fuel pump for 2 seconds to pressurize the fuel system With the engine running the ECM grounds the PGM FI main relay and feeds current to the fuel pump When the engine is not running and the ignition is on the ECM cuts ground to the PGM FI main relay which cuts current to the fuel pump PGM FI Main Relay 1 and 2 The PGM FI main relay consists of two separate relays Relay 1 is energized whenever the ignition switch is ON II to supply battery voltage to the ECM power to the injectors and power for relay Relay 2 is energized to supply power to the fuel pump for 2 seconds when the ignition switch is turned ON II and when the engine is running P Intake Air System Throttle Body The throttle body is a single barrel side draft type It Refer to the System Diagram to see the functional houses the TP senser and the IAC valve The lower layout of the system portion of the IAC valve is heated by engine coolant from the cylinder head Intake Air Bypass Control Thermal Valve When the engine is running the intake air bypass control thermal valve sends air to the injectors TP SENSOR WAX ELEMENT IAC VALVE INTAKE AIR L BYPASS CONTRO INJECTOR THERMAL VALVE 11 33 Fuel and Emissions Systems System Descriptions cont d Catalytic Converter System Three Way Catalytic Converter TWC The TWC c
131. o DTCs set Engine will not start Troubleshoot the immobilizer system see page 22 165 immobilizer indicator stays on or flashs Hard starting 1 Testthe battery see page 22 50 Low compression MIL works OK no DTCs set 2 Checkthe fuel pressure see page 11 145 Intake air leaks Contaminated fuel Cold fast idle too low 1 Do the ECM idle learn procedure see page 11 139 MIL works OK DTCs set 2 Check the idle speed see page 11 138 Cold fast idle too high 1 Dothe ECM idle learn procedure see page 11 139 MIL works OK no DTCsset 2 Checkthe idle speed see page 11 138 3 Inspect adjust the throttle cable see page 11 163 4 Inspectand test the throttle body see page 11 160 RS Idle speed fluctuates 1 Do the ECM idle learn procedure see page 11 139 Intake air leaks MIL works OK no DTCs set 2 Checkthe idle speed see page 11 138 3 Inspect adjust the throttle cable see page 11 163 4 Inspect and test the throttle body see page 11 160 After warming up idle speed 1 Dothe ECM idle learn procedure see page 11 139 Vacuum hose clogged is below specifications with 2 Troubleshoot the alternator FR signal circuit see cracked poor no load page 11 134 connection MIL works OK no DTCs set 3 Inspect and test the throttle body see page 11 160 After warming up idle speed 1 Dothe ECM idle learn procedure see page 11 139 is above specifications with 2 Troublesh
132. on switch ON Il There should be battery voltage If the voltage is as specified go to step 8 f the voltage is not as specified check for anopen in the YEL BLK or BLK wire poor ground G551 FUEL PUMP 5P CONNECTOR YEL BLK ms 2 1 2 Wire side of female terminals 8 Turn the ignition switch OFF Remove the No 9 BACK UP 7 5A fuse from the under hood fuse relay box for at least 10 seconds then reinstall it 9 Install a 2 Q resistor between fuel pump 5P connector terminals No 1 and No 2 then turn the ignition switch ON II FUEL PUMP 5P CONNECTOR AWV 29 RESISTOR 7 YEL BLK Wire side of female terminals lt 10 Check that the pointer of the fuel gauge indicates 15 Measure resistance between the No 1 and No 2 F terminals with the float at E EMPTY 1 2 HALF FULL and F FULL positions f the pointer does not indicate F replace the If you do not get the following readings replace the gauge fuel gauge sending unit see page 11 163 If the pointer indicates F inspect the fuel gauge sending unit Float F 1 2 LOW E Position NOTE The pointer of the fuel gauge returns to the Resistance 11 685 114 4 130 bottom of the gauge dial when the ignition switch Q to 13 to745 10 126 6 to 132 is OFF regardless of the fuel level _ NOTE Remove the No 9 BACK UP 7 5A fuse from
133. ont d 11 13 Fuel and Emissions Systems System Descriptions cont d ECM Data cont d Data Description Operating Value Freeze Data Fuel System Fuel system status is indicated as open or closed At idle speed closed YES Status Closed Based on the A F Sensor output the ECM determines the air fuel ratio and controls the amount of injected fuel Open Ignoring A F Sensor output the ECM refers to signals from the throttle position TP manifold absolute pressure MAP intake air temperature IAT barometric pressure and engine coolant temperature ECT sensors to control the amount of injected fuel Short Term The air fuel ratio correction coefficient for correcting the 0 7 1 5 YES Fuel Trim amount of injected fuel when the fuel system status is closed When the ratio is leaner than the stoichiometric ratio the ECM increases short term fuel trim gradually and the amount of injected fuel increases The air fuel ratio gradually gets richer causing a lower oxygen content in the exhaust gas Consequently the short term fuel trim is lowered and the ECM reduces the amount of injected fuel This cycle keeps the air fuel ratio close to the stoichiometric ratio when in closed loop status Long Term Long term fuel trim is computed from short term fuel trim 0 8 1 2 YES Fuel Trim and indicates changes occurring in the fuel supply system over a long period If long term fuel
134. onverts hydrocarbons HC carbon monoxide CO and oxides of nitrogen NOx in the exhaust gas to carbon dioxide CO2 dinitrogen N2 and water vapor HOUSING THREE WAY CATALYST FRONT OF VEHICLE 11 34 Positive Crankcase Ventilation PCV System The PCV valve prevents blow by gasses from escaping into the atmosphere by venting them into the intake manifold BREATHER PIPE m BLOW BY VAPOR lt FRESH AIR Evaporative Emission EVAP Control System Refer to the System Diagram to see the functional layout of the system EVAP Canister The EVAP canister temporarily stores fuel vapor from the fuel tank until it can be purged back into the engine and burned EVAP Canister Purge Valve When the engine coolant temperature is below 149 F 65 C the ECM turns off the EVAP canister purge valve which cuts vacuum to the EVAP canister Fuel Tank Pressure FTP Sensor The FTP sensor converts fuel tank absolute pressure into an electrical input to the ECM during the EVAP leak check SENSOR UNIT CIRCUIT ASSEMBLY TERMINAL Two Way Valve and Bypass Solenoid Valve The EVAP two way valve is installed between the fuel tank and the EVAP canister line The EVAP two way valve sends fuel vapor to the EVAP canister corresponding to the pressure inside the fuel tank It also relieves excess vacuum in the tank by allowing fresh air to be drawn into the tank
135. ood ECM then recheck see page 11 6 if the symptom indication goes away with a known good ECM replace the original ECM E NO Replace the A F sensor Sensor 1 11 87 PGM FI System DTC Troubleshooting cont d DTC P1163 A F Sensor Sensor 1 Slow Response NOTE If DTC P1162 is stored at the same time as DTC P1163 troubleshoot DTC P1162 first then recheck for DTC P1163 1 Reset the ECM see page 11 4 2 Startthe engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 3 Test drive under the following conditions 55 mph 89 km h steady speed Transmission in 5th gear Until the A F sensor readiness code or Temporary DTC P1163 comes on 4 Check for a Temporary DTC with the scan tool 15 Temporary DTC P1163 indicated YES Replace the A F sensor Sensor 1 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the A F sensor Sensor 1 and atthe 11 88 DTC P1164 A F Sensor Sensor 1 Circuit Range Performance Problem 1 Reset the ECM see page 11 4 2 Startthe engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on 3 Test drive in 3rd gear Starting at 1 600 rpm accelerate using wide open throttle for at least 5 seconds Then decelerate for at least 5 seconds with the throttle completely closed until the A F sensor readiness code is set to complete
136. ools 93750 or equivalent commercially available or equivalent commercially available 1 Disconnect the A F sensor 4P connector A then 1 Disconnect the secondary HO2S 4P connector A remove the A F sensor B then remove the secondary HO2S B 2 Install the A F sensor in the reverse order of removal 2 Install the secondary HO2S in the reverse order of removal 11 113 PGM FI System ECT Sensor Replacement 1 Remove the air cleaner see page 11 162 2 Disconnect the ECT sensor 2P connector 3 Remove the ECT sensor 12 1 2 kgf m 8 7 Ibf ft 4 Install the sensor in the reverse order of removal with a new o ring B 11 114 CMP Sensor B TDC Sensor 14 Replacement 1 Remove the air cleaner see page 11 162 2 Disconnect the CMP sensor B TDC sensor 3P connector 3 Remove the CMP sensor B TDC sensor A Man 11 2 kgf m 8 7 Ibf ft 4 Install the sensor in the reverse order of removal with a new o ring B e IAT Sensor Replacement Knock Sensor Replacement 1 Disconnect the IAT sensor 2P connector 1 Remove the intake manifold bracket A 2 Remove the clip and the IAT sensor 31 3 2 kgf m 23 Ibf ft 3 Install the sensor in the reverse order of removal 24N m 2 4 kgf m 17 b e 2 Disconnect the knock sensor 1P connector 3 Remove the knock sensor B 4 Install the sensor in t
137. oot the alternator FR signal circuit see no load page 11 134 MIL works OK no DTCs set T Low power 1 Check the fuel pressure see page 11 145 Low compression MIL works OK no DTCs set 2 Inspect and test the throttle body see page 11 160 gt Camshaft timing 3 Inspect adjust the throttle cable see page 11 163 problem Engine oil level problem Engine stalls 1 Do the ECM idle learn procedure see page 11 139 Intake air leaks MIL works OK no DTCs set 2 Check the fuel pressure see page 11 145 Faulty harness and i 3 Check the idle speed see page 11 138 sensor connections 4 Troubleshoot the brake pedal position switch signal circuit see page 11 137 11 10 lt Symptom Diagnostic procedure Also check for Difficult to refuel MIL works OK no DTCs set 1 Testthe fuel tank vapor control valve see page 11 187 Inspect the fuel tank vapor control signal tube 3 between the fuel pipe and the fuel tank vapor control valve 4 Inspectthe fuel tank vapor vent tube between the EVAP canister and the fuel tank vapor control valve Check the EVAP canister Malfunctioning gas station filling nozzle Fuel overflows during refueling No DTCs set Replace the fuel tank vapor control valve see page 11 189 Malfunctioning gas station filling nozzle 11 11 Fuel and Emissions Systems System Descriptions Electronic Control System The f
138. oubleshooting cont d DTC P0141 Secondary HO2S Sensor 2 Heater Circuit Malfunction 1 Reset the ECM see page 11 4 2 Startthe engine Is DTC P0141 indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the secondary HO2S Sensor 2 and at the 3 Turn the ignition switch OFF 4 Disconnect the secondary HO2S Sensor 2 4P connector 5 Atthe secondary HO2S Sensor 2 side measure resistance between HO2S 4P connector terminals No 3 and No 4 SECONDARY HO2S SENSOR 2 4P CONNECTOR Wire side of female terminals Is there about 3 3 Q YES Go to step 6 NO Replace the secondary HO2S Sensor 2 11 68 6 Check for continuity between body ground and secondary HO2S Sensor 2 connector terminals No 3 and No 4 individually SECONDARY HO2S SENSOR 2 4P CONNECTOR Wire side of female terminals Is there continuity YES Replace the secondary HO2S Sensor 2 W NO Go to step 7 7 Turn the ignition switch ON 11 8 Measure voltage between secondary HO2S 4P connector terminals No 3 and No 4 SECONDARY HO2S SENSOR 2 4P CONNECTOR SO2SHTC 3 4 BLK WHT 161 BLK ORN Terminal side of male terminals Is there battery voltage YES Go to step 9 NO to step 12 9 Turn the ignition switch OFF 10 Disconnect ECM connector 31 11
139. ould be about 10 when the throttle is fully closed and about 90 when the throttle is fully opened If the throttle position is correct the throttle body is OK If the throttle position is not correct replace the throttle body 11 160 amp K Special Tools Required Vacuum Pump Gauge 0 30 in Hg A973X 041 XXXXX 1 Start the engine Then let it idle NOTE The engine coolant temperature must be below 149 65 2 Remove the vacuum hose A from the intake air duct and connect a vacuum pump gauge to the hose A A973X 041 XXXXX 3 Raise and lower the engine speed and make sure the vacuum gauge reading changes as the engine speed changes If the vacuum reading does not change check for these problems Misrouted leaking broken or clogged intake air bypass control system vacuum lines Acracked or damaged intake air bypass control thermal valve 4 Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle lt Intake Air Bypass Control Thermal Valve Test 5 Raise and lower the engine speed and make sure the vacuum gauge reading does not change as the rpm changes If the vacuum reading changes check for these problems Misrouted leaking broken or clogged intake air bypass control system vacuum lines Acracked or damaged intake air bypass control thermal valve 11 161 Intake Air System Ai
140. ound ECM CONNECTOR E 31P MRLY RED YEL 13I213T4TsTs 7 818 Sp ala 22324 L fee 271712913011 Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM 7 and the PGM FI main relay 1 8 NO Replace the PGM FI main relay 1 8 12 Turn the ignition suitch OFF 13 Reconnect ECM connector E 31P cont d 11 81 PGM FI System DTC Troubleshooting cont d 14 Measure voltage between ECM connector terminal E7 and body ground ECM CONNECTOR E 31P MRLY RED YEL 9 20 21 30 31 Wire side of female terminals 5 6 V 141516 22 28 24 126 Is there battery voltage YES Go to step 15 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM W 15 Disconnect ECM connector A 31P 16 Turn the ignition switch ON II 17 Measure voltage between body ground and ECM connector terminals A3 and A2 individually ECM CONNECTOR A 31P 6 2 1 1 YEL BLK YEL BLK L 3 1 2 8 4 s e 7 718 DHE 156819202 2223124 2526 21282930 Wire side of female terminals Is there battery voltage YES Go to step 18 NO Update the ECM if it does not have the latest
141. ound EVAP BYPASS SOLENOID VALVE 2P CONNECTOR 2WBS BLU RED Wire side of female terminals Is there continuity YES Go to step 18 NO Repair open in the wire between the EVAP bypass solenoid valve and the ECM E20 18 Turn the ignition switch ON II lt 19 Measure voltage between EVAP bypass solenoid valve 2P connector terminal No 1 and body ground EVAP BYPASS SOLENOID VALVE 2P CONNECTOR Is there battery voltage YES Replace the EVAP two way bypass solenoid valve A 8 NO Repair open in the wire between the EVAP bypass solenoid valve and the No 4 ACG 10A 11 177 EVAP System DTC Troubleshooting cont d 20 Plug the fuel tank port A of the EVAP two way valve A973X 041 XXXXX 21 While monitoring FTP sensor voltage with the Honda PGM Tester or measuring the voltage between ECM connector terminals E4 and E14 slowly pump the vacuum pump until the voltage drops to about 1 5 volts ECM CONNECTOR E 31P SG3 PNK 112 3 4 5 6 7 epo d 2 2 24 FTP LT GRN 819 120 21 Wire side of female terminals Does the voltage drop to 1 5 V and hold for at least 20 seconds YES The EVAP bypass solenoid valve EVAP two way valve is OK Go to step 22 NO Repair the leak from the EVAP bypass solenoid valve EVAP two way valve or FTP sensor 11 178 EVAP Canister Vent Sh
142. r No Signal P1456 90 P1456 Evaporative Emissions EVAP Control System see page 11 175 Leakage Fuel Tank System PER P1457 90 P1457 Evaporative Emissions EVAP Control System see page 11 180 Leakage EVAP Canister System P1505 109 P1505 Positive Crankcase Ventilation PCV Air Leakage see page 11 168 P1519 14 ____ Idle Air Control IAC Valve Circuit Malfunction _ see page 11 131 P1607 Engine Control Module ECM Internal Circuit see page 11 96 Malfunction These DTCs are indicated by a blinking MIL when the SCS service signal line is jumped with the Honda PGM Tester 11 9 Fuel and Emissions Systems Symptom Troubleshooting Index When the vehicle has one of these symptoms check the diagnostic trouble code DTC with the scan tool If there is no DTC do the diagnostic procedure for the symptom in the sequence listed until you find the cause Symptom Diagnostic procedure Also check for Engine will not start 1 1 Test the battery see page 22 50 Low compression MIL works OK no DTCs set 2 Testthe starter see page 4 8 No ignition spark 3 Troubleshoot the fuel pump circuit see page 11 Intake air leaks 141 Locked up engine Broken timing chain Contaminated fuel Engine will not start MIL Troubleshoot the MIL circuit see page 11 97 comes on and stays on or never comes on at all n
143. r lif NO Go to step 57 Turn the ignition switch OFF Disconnect ECM connector A 31P 59 Check for continuity between ECM connector terminal A21 and body ground ECM CONNECTOR A 31P Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM A21 and the MAP sensor M NO Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original W 60 Measure voltage between body ground and ECM connector terminal A20 ECM CONNECTOR A 31P Wire side of female terminals Is there about 5 V YES Go to step 68 NO to step 61 61 62 63 64 65 66 E Turn the ignition switch OFF Disconnect the throttle position TP sensor 3P connector Turn the ignition switch ON II Measure voltage between body ground and ECM connector terminal A20 ECM CONNECTOR A 31P Wire side of female terminals Is there about 5 V YES Replace the throttle body the TP sensor is not available separately 8 NO Go to step 65 Turn the ignition switch OFF Disconnect ECM connector A 31P 11 105 System MIL Circuit Troubleshooting cont d 67 Check for continuity between ECM connector terminal A2
144. r Cleaner Replacement Air Cleaner Element Replacement 4 1 Disconnect the PCV hose 1 Remove the nuts A and the stud B 3 0 3 kgf m 2 Ibf ft 2 Remove the air cleaner C 2 Open the air cleaner housing cover B 3 Install in the reverse order of removal 3 Remove the air cleaner C from the air cleaner housing D 4 Install in the reverse order of removal 11 162 e Throttle Cable Adjustment 1 Check cable free play at the throttle linkage Cable free play A should be 10 12 mm 3 8 1 2 in 2 If the free play is not within spec 10 12 mm 3 8 1 2 in loosen the locknut B turn the adjusting nut C until the free play is as specified then retighten the locknut b o 3 With the cable properly adjusted check the throttle valve to be sure it opens fully when you push the accelerator pedal to the floor Also check the throttle valve to be sure it returns to the idle position whenever you release the accelerator pedal 11 163 Intake Air System Throttle Cable Removal Installation 1 Fully open the throttle valve then remove the throttle cable A from the throttle link B P N 08798 9002 2 Remove the cable housing C from the cable bracket D 3 Remove the throttle cable A from the accelerator pedal B SILICONE GREASE B P N 08798 9002 11 164 4 Install in the reverse order of removal 5 Af
145. rminal No 2 and body ground IAT SENSOR 2P CONNECTOR Wire side of female terminals Is there continuity YES Repair short in the wire between the ECM B17 and the IAT sensor W NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E lt 8 Check the temperature reading on the scan tool Be aware that if the engine is warm the reading will be higher than ambient temperature If the engine is cold the IAT and ECT will have the same value Is the correct ambient temperature indicated YES Intermittent failure system is OK at this time Check for poor connections or loose terminals at the IAT sensor and at the ECM IN Replace the IAT sensor lil 11 55 PGM FI System DTC Troubleshooting cont d DTC P0113 IAT Sensor Circuit High Voltage 1 Turn the ignition switch ON il 2 Check the IAT with the scan tool Is 4 F 20 or less or L Limit in Honda mode of PGM Tester or 5 V indicated YES Go to step 3 NO Intermitent failure system is OK at this time Check for poor connections or loose terminals at the IAT sensor and at the 3 Turn the ignition switch OFF 4 Disconnect the IAT sensor 2P connector 5 Connect sensor 2P connector terminals No 1 and No 2 with a jumper wire IAT SENSO
146. rminals ECM CONNECTOR 31 1 126 272510137 Wire side of female terminals 47 Turn the ignition switch ON Il Is there continuity YES Replace the PGM FI main relay 1 NO Repair open in the wire between the PGM FI main relay 1 and the A2 m cont d 11 103 PGM FI System MIL Circuit Troubleshooting cont d 51 52 11 Measure voltage between body ground and ECM connector terminals A4 A5 A23 and A24 individually ECM CONNECTOR A 31P PG2 BLK PG1 BLK Wire side of female terminals Is there more than 1 0 V YES Go to step 52 NO Repair open in the wire s that had more than 1 0 V between G101 and the ECM A4 A5 A23 A24 m Measure voltage between body ground and ECM connector terminal A21 ECM CONNECTOR A 31P Wire side of female terminals Is there about 5 V YES Go to step 60 NO Go to step 53 104 53 54 55 56 57 58 Turn the ignition switch OFF Disconnect the manifold absolute pressure MAP sensor 3P connector Turn the ignition switch ON Il Measure voltage between body ground and ECM connector terminal A21 ECM CONNECTOR A 31 112 314 6 10 1112 15 16 22 23124 2526 Wire side of female terminals Is there about 5 V YES Replace the MAP senso
147. rocedure Update the ECM only if the ECM does not already have the latest software loaded NOTE Make sure the battery is fully charged before you update the ECM To prevent ECM damage during the update do not turn the ignition switch OFF and do not use any of the vehicle s electrical devices light horn radio etc How to Update the ECM 1 Turn the ignition switch ON Il Do not start the engine 2 Connect the Honda Interface Module HIM to the Data Link Connector DLC A located under the driver s side of dashboard EQS05A35570 3 Do the ECM update procedure as described on the HIM label and in the ECM update system 11 6 How to Substitute the ECM 1 Remove the ECM from the vehicle 2 Install a known good ECM in the vehicle 3 Rewrite the immobilizer code with the ECM replacement procedure from the Honda PGM Tester It allows you to start the engine 4 After completing your tests reinstall the original ECM and rewrite the immobilizer code with the ECM replacement procedure on the Honda PGM Tester again w DTC Troubleshooting Index DTC 1 Temporary DTC Detection Item Note MIL indication __ P0010 56 i Variable Valve Timing Control VTC Oil Control see page 11 118 Solenoid Valve Malfunction x 2 P0011 56 i P0011 Variable Valve Timing Contro VTC System see page
148. ry voltage YES Go to step 6 NO Repair open in the wire between the under dash fuse relay box and PGM FI main relay 2 8 Turn the ignition switch OFF Disconnect ECM connector E 31P Check for continuity between PGM FI main relay 2 5P connector terminal No 3 and ECM connector terminal E1 PGM FI MAIN RELAY 2 5P CONNECTOR Wire side of IMOFPR female terminals GRN Wire side of female terminals Is there continuity YES Go to step 9 NO Repair open in the wire between the PGM FI main relay 2 and the cont d 11 141 Fuel Supply System Fuel Pump Circuit Troubleshooting cont d 9 Reinstall the PGM FI main relay 2 10 Turn the ignition switch ON Il 11 Measure voltage between ECM PCM connector terminal E1 and body ground CONNECTOR E 31P IMOFPR GRN YEL Wire side of female terminals Is there battery voltage YES Go to step 12 NO Replace the PGM FI main relay 2 8 12 Turn the ignition switch OFF 13 Reconnect ECM connector E 31P 14 Turn the ignition switch ON II and measure voltage between ECM connector terminal E1 and body ground within the first 2 seconds after the ignition switch was turned ON II ECM CONNECTOR E 31 IMOFPR GRN YEL Wire side of female terminals 11 142 Is there battery voltage YES Update the ECM if it does no
149. step 11 NO Go to step 7 7 Disconnect the VTC oil control solenoid valve 2P connector 11 118 8 Measure resistance between VTC oil control solenoid valve 2P terminals No 1 and No 2 VTC OIL CONTROL SOLENOID VALVE 2P CONNECTOR Terminal side of male terminals Isthere 6 75 8 25 0 YES Go to step 9 NO Replace the VTC oil control solenoid valve see page 11 127 8 9 Connect VTC oil control solenoid valve 2 connector terminals No 1 and No 2 to body ground with a jumper wire individually VTC OIL CONTROL SOLENOID VALVE 2P CONNECTOR VTC BLK WHT BLU WHT JUMPER WIRE JUMPER WIRE Wire side of female terminals 10 Check for continuity between ECM connector terminals B1 and B23 and body ground individually ECM CONNECTOR B 24P VTC BLU WHT 1 2 3 4 5 6 7 819110 13715 1718 21 23 IBLK WHT Wire side of female terminals Is there continuity YES Go to step 11 NO Repair open in the wire between the ECM B1 B23 and the VTC oil control solenoid valve w 11 Check for continuity between ECM connector terminals B1 and B23 and body ground individually ECM CONNECTOR B 24 VTC BLU WHT uwm 1 2 3 4 5 _ 6 7 819 0 BABA 1718 2 23 vic BLK WHT Q Wire side of female terminals Is there continuity YES Go to step 12 NO
150. stored in the EVAP canister until it can be purged from the canister into the engine and burned The EVAP canister is purged by drawing fresh air through it and into a port on the intake manifold The purging vacuum is controlled by the EVAP canister purge valve which operates whenever engine coolant temperature is above 149 F 65 C When vapor pressure in the fuel tank is higher than the set value of the EVAP two way valve the valve opens and regulates the flow of fuel vapor to the EVAP canister During refueling the fuel tank vapor control valve opens with the pressure in the fuel tank and feeds the fuel vapor to the EVAP canister M FUEL TANK LT GR VAPOR SIGNAL TUBE FTP GRN RECIRCULATION VALVE YEL BLU BLU RED VARIOUS LT GRN RED SENSOR D j YEL l BLU BLK FUEL FILL CAP EVAP l A J canister ORN VENT SHUT FUEL TANK VALVE FUEL TANK EVAP BYPASS From VAPOR BLK YEL Q4 No 4 RECIRCULATION VALVE 10 A fuse TUBE 4 FUEL TANK reum EST VAPOR CONTROL VALVE cx EVAP CANISTER EVAP CANISTER PURGE VALVE EVAP TWO WAY VALVE 11 37 Fuel and Emissions Systems System Descriptions cont d ECM Circuit Diagram YEL BLK VEL BLK No 1 INJECTOR 4 YEL BLK No 2 INJECTOR YEL BLK No 3 INJECTOR YEL BLK gt No 4 INJECTOR IAC
151. substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Go to step 14 14 Check the VTC actuator see page 6 8 Is the VTC actuator OK YES Remove the auto tensioner see page 4 28 and clean or replace the VTC oil strainer Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM a NO Replace the VTC actuator PA DTC P0340 CMP Sensor A No Signal 7 Measure voltage between CMP sensor A 3P connector terminal No 1 and body ground DTC P0344 CMP Sensor Intermittent Interruption CMP SENSOR A 3P CONNECTOR 1 Reset the ECM see page 11 4 2 Startthe engine 15 DTC P0340 and or P0344 indicated YES Go to step 3 Wire side of female terminals NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at Is there about 5 V the CMP sensor A and at the YES Go to step 8 3 Turn the ignition switch OFF to step 10 4 Disconnect the CMP sensor A connector 8 Measure voltage between CMP sensor A 3P 5 Turn the ignition switch ON II connector terminals No 2 and No 3 6 Measure voltage between CMP sensor A 3P CMP SENSOR A 3P CONNECTOR e connector terminal No 3 and body ground CMP
152. system P0116 P0117 P0118 Engine coolant temperature ECT sensor P0112 P0113 Intake air temperature IAT sensor P0500 Vehicle speed sensor VSS P0335 P0336 Crankshaft position CKP sensor P0300 Random misfire P0301 P0302 P0303 P0304 No 1 No 2 No 3or No 4 cylinder misfire P0505 Idle control system malfunction P1519 Idle air control IAC valve DTC P0128 can occasionally set when the hood is opened while the engine is running 1 Check the engine coolant level Is the engine coolant level low YES Refill the engine coolant If necessary repair the coolant leakage lB NO Go to step 2 2 Turn the ignition switch ON Il and make sure the is off 11 64 3 Check the radiator fan Does the radiator fan keep running YES Check the radiator fan circuit see page 10 14 the radiator fan switch circuit Short see page 10 16 and the radiator fan switch see page 10 17 Also inspect the ECT and IAT circuits and terminal connections If the circuits the switch and the connections are OK update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E NO Replace the thermostat see page 10 8 B PI EO DTC P0134 A F Sensor Sensor 1 No Activity Detected DTC P0137 Secondary HO2S Sensor 2 Circuit Low Voltage
153. t does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM IM NO Repair the engine 30 Disconnect ECM connector B 24P 31 Turn the ignition switch ON II 32 Measure voltage between body ground connector terminal see table ECM CONNECTOR B 24P INJ2 1808 INJ4 YEL INJ1 BRN RED i 2 3 4 5 6 7 819 Wire side of female terminals PROBLEM DTC ECM WIRE CYLINDER TERMINAL COLOR No 1 P0301 B5 BRN No 2 P0302 B4 RED No 3 P0303 B3 BLU No 4 P0304 B2 YEL Is there battery voltage YES Go to step 33 NO Go to step 41 33 Turn the ignition switch OFF and remove the engine cover 34 Disconnect the injector 2P connector from the problem cylinder 35 Measure the resistance between injector 2P connector terminals No 1 and No 2 INJECTOR 2P CONNECTOR IGP INJ Terminal side of male terminais 15 there 10 Q 139 YES Go to step 36 NO Replace the injector see page 11 111 36 37 38 39 40 41 42 43 44 lt Exchange the injector from the problem cylinder with one from another cylinder Let the engine idle for 2 minutes Test drive the vehicle for several
154. t have the latest Software or substitute a known good ECM then recheck see page 11 6 if the symptom indication goes away with a known good ECM replace the original NO Go to step 15 15 Turn the ignition switch OFF 16 Remove the rear seat cushion see page 20 80 17 Remove the access panel from the floor 18 Measure voltage between fuel pump 5P connector terminal No 5 and body ground within the first 2 seconds after the ignition switch was turned ON II FUEL PUMP 5P CONNECTOR FUEL PUMP YEL GRN Wire side of female terminals Is there battery voltage YES Go to step 24 NO Go to step 19 19 Turn the ignition switch OFF 20 Remove the PGM FI main relay 2 x 21 Connect PGM FI main relay 2 connector 25 Check for continuity between fuel pump 5P terminals No 1 and No 2 with a jumper wire connector terminal No 4 and body ground PGM FI MAIN RELAY 2 5P CONNECTOR FUEL PUMP 5P CONNECTOR FUEL PUMP YEL GRN JUMPER WIRE YEL BLK Wire side of female terminals Wire side of female terminals 22 Turn the ignition switch ON Il Is there continuity 23 Measure voltage between fuel pump 5P connector YES Replace the fuel pump terminal No 5 and body ground NO Repair open in the wire between the fuel FUEL PUMP 5P CONNECTOR pump 5P connector and 5551 YEL GRN Wire side of female terminals Is there battery voltage
155. ta link connector DLC An intermittent short in the wire between the ECM E31 and the gauge assembly NO If the MIL is always off go to step 6 But if the MIL sometimes works normally first check for these problems Aloose No 10 METER 7 5A fuse in the under dash fuse relay box Aloose No 20 IG 40A Canada 50A fuse in the under hood fuse relay box A loose No 6 ECU 15A fuse in the under hood fuse relay box lt Aloose No 17 FUEL PUMP 15A fuse in the under dash fuse relay box A poor connection at ECM terminal E31 An intermittent open in the GRN ORN wire between the ECM E31 and the gauge assembly An intermittent short in the wire between the ECM A21 and the manifold absolute pressure MAP sensor An intermittent short in the wire between the ECM A20 and the throttle position TP sensor An intermittent short in the wire between the ECM and the fuel tank pressure FTP sensor Turn the ignition switch OFF Turn the ignition switch II Is the low oil pressure light on YES Go to step 10 NO Go to step 8 Inspect the No 10 METER 7 5 fuse in the under dash fuse relay box Is the fuse OK YES Go to step 9 NO Repair short in the wire between No 10 METER 7 5A fuse and the gauge assembly Also replace the No 10 METER 7 5A fuse i Inspect the No 20 IG1 40A Canada 50A fuse in the under hood fuse re
156. ter installing start the engine Hold the engine at 3 000 rpm with no load in neutral until the radiator fan comes on then let it idle 6 Hold the cable removing all slack from it 7 Setthe locknut on the cable bracket A Turn the adjusting nut B so that its free play is The should be no clearance B 8 Remove the cable from the cable bracket A Set the adjusting nut on the other side of the throttle bracket then tighten the locknut C 9 With the cable properly adjusted check the throttle valve to be sure it opens fully when you push the accelerator pedal to the floor Also check the throttle valve to be sure it returns to the idle position whenever you release the accelerator pedal e Throttle Body Removal Installation NOTE Do not adjust the throttle stop screw After reassembly adjust the throttle cable see page 11 163 and the cruise control cable see page 4 45 The throttle position TP sensor is not removable THROTTLE STOP SCREW Do not adjust THROTTLE LEVER There should be no clearance CRUISE CONTROL CABLE THROTTLE CABLE MANIFOLD ABSOLUTE PRESSURE SENSOR GASKET Replace EVAPORATIVE EMISSION EVAP CANISTER PURGE VALVE THROTTLE POSITION TP SENSOR IDLE AIR CONTROL IAC VALVE 11 165 Intake Air System Throttle Body Disassembly Reassembly 2 N m 0 2 kgf m 1 Ibf ft e MAP SENSOR a O RING
157. terminals E4 and E14 slowly pump ECM connector terminals E4 and E14 slowly pump the vacuum pump the vacuum pump ECM CONNECTOR E 31P CONNECTOR E 31 SG3 PNK SG3 1121314 5 6 7 21314 5 6 7 819 amp BOX SEES FTP LT GRN FTP LT GRN Wire side of female terminals Wire side of female terminals 32 Continue to pump vacuum until the voltage drops 38 Continue to pump vacuum until the voltage drops to about 1 5 V Make sure the engine coolant to about 1 5V Make sure the engine coolant temperature is still above 95 F 35 C and your temperature is still above 95 F 35 C and your vacuum pump has no leak vacuum pump has no leak 33 Monitor the voltage for 20 seconds 39 Monitor the voltage for 20 seconds Does the voltage drop 1 5V and hold for at least Does the voltage hold for at least 20 seconds 20 seconds YES Inspect the fuel tank vapor control line and YES the EVAP canister vent shut valve connections line and connections NO Go to step 40 NO Go to step 34 40 Turn the ignition switch OFF 34 Turn the ignition switch OFF 41 Disconnect the purge line hose A from the 35 Disconnect the quick connect fitting A from the canister at the metal line and plug the hose B EVAP canister and plug the canister port B A973X 041 XXXXX 42 Turn the ignition switch ON 11 36 Turn the i
158. the order listed until you find the cause Symptom Procedure s Also check for Random misfire only Check fuel pressure see page 11 145 Low compression at low RPM and Low quality fuel under load Random misfire only Check fuel pressure see page 11 145 Malfunction in the during acceleration VTEC system see page 11 123 Random misfire at Check fuel pressure see page 11 145 Correct engine valve high RPM under clearances see page 6 load or under 9 random conditions 11 71 PGM FI System DTC Troubleshooting cont d DTC P0301 No 1 Cylinder Misfire DTC P0302 No 2 Cylinder Misfire DTC P0303 No 3 Cylinder Misfire DTC P0304 No 4 Cylinder Misfire 1 After checking and recording the freeze data reset the ECM see page 11 4 If there is no freeze data of the misfire just clear the DTC 2 Start the engine and listen for a clicking sound from the injector at the problem cylinder Does the injector click YES Go to step 3 NO Go to step 30 3 Turn the ignition switch OFF 4 Exchange the ignition coil from the problem cylinder with one from another cylinder 5 Test drive the vehicle for several minutes in the range of the freeze data or under various conditions if there was no freeze data 6 Check for a DTC or a Temporary DTC with the scan tool Is DTC or Temporary DTC P0301 P0302 P0303 or P0304 indicated YES Go to step 7 NO Intermittent misfire
159. the symptom indication goes away with a known good replace the original 82 Turn the ignition switch OFF 83 Disconnect ECM connector E 31P 84 Turn the ignition switch ON Il Does the MIL stay on YES Repair short in the wire between the gauge assembly and the ECM E31 If the wire is OK replace the gauge assembly NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E V 11 108 DLC Circuit Troubleshooting If the ECM does not communicate with the OBD II scan tool Honda PGM Tester or I M test equipment do this troubleshooting procedure 1 Measure voltage between DLC terminal No 16 and body ground DATA LINK CONNECTOR DLC EZZ warn ela ie Terminal side of female terminals Is there battery voltage YES Go to step 2 NO Repair open in the wire between DLC terminal No 16 and the No 9 BACK UP 7 5 A fuse in the under hood fuse relay box 8 2 Measure voltage between DLC terminals No 4 and No 16 DATA LINK CONNECTOR DLC PG BLK 227 IEIAVAIE VAT VAL WHT RED Terminal side of female terminals Is there battery voltage YES Go to step 3 NO Repair open in the wire between DLC terminal No 4 and body ground 3 Measure voltage between
160. through the EVAP canister The EVAP bypass solenoid valve opens to bypass the two way valve during the EVAP leak check EVAP BYPASS SOLENOID VALVE SENSOR DIAPHRAGM VALVE cont d 11 35 Fuel and Emissions Systems System Descriptions cont d Idle Control System Diagram The idle speed of the engine is controlled by the Idle Air Control IAC valve After the engine starts the IAC valve opens for a certain amount of time The amount of air is increased to raise the idle speed When the engine coolant temperature is low the IAC valve is opened to obtain the proper fast idle speed The amount of bypassed air is controlled in relation to engine coolant temperature INTAKE AIR DUCT AIR CLEANER INTAKE MANIFOLD IAC VALVE ENGINE COOLANT BLK PGM FI THROTTLE BODY 4 VARIOUS ECM PCM SENSORS Intake Air System Diagram This system supplies air for engine needs A resonator in the intake air pipe provides additional silencing as air is drawn into the system INTAKE MANIFOLD IAC VALVE AIR DUCT AIR CLEANER ENGINE COOLANT RESONATOR YEL BLK From PGM FI MAIN RELAY THROTTLE BODY VARIOUS ECM PCM SENSORS BLK 11 36 w P Evaporative Emission EVAP Control Diagram The EVAP controls minimize the amount of fuel vapor escaping to the atmosphere Vapor from the fuel tank is temporarily
161. tinuity YES Repair short in the wire between the ECM A25 and the CMP sensor NO Update the if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original 11 122 DTC P0341 VTC Phase Gap 1 Reset the ECM see page 11 4 2 Startthe engine Is DTC P0341 indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the CMP sensor A and at the ECM E 3 Checkthe VTC oil control solenoid valve see page 11 127 Isthe VTC oil control solenoid valve OK YES Go to step 4 NO Clean the VTC oil control solenoid valve or replace it see page 11 127 4 Remove the head cover and check the cam chain see page 6 12 Isthe cam chain OK YES Go to step 5 NO Replace the cam chain see page 6 12 5 Check the VTC actuator see page 6 8 1 the VTC actuator OK YES Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM IM NO Replace the VTC actuator DTC P1259 VTEC System Malfunction Special Tools Required Pressure gauge adapter 07NAJ P07010A A T low pressure gauge w panel 07406 0070300 A T pressure hose 0740
162. tion switch ON I DTC P0453 FTP Sensor Circuit High Voltage 1 Check the vacuum lines at the FTP sensor for misrouting leakage breakage or clogging Are the vacuum lines OK YES Go to step 2 NO Repair or replace vacuum lines as necessary W Reset the ECM see page 11 4 Remove the fuel fill cap Monitor FTP sensor voltage with the Honda PGM Tester or measure voltage between body ground and ECM connector terminal E14 ECM CONNECTOR E 31P Wire side of female terminals Is there about 2 5 V YES Intermittent failure system is OK at this time Check for poor connections or loose terminals at the FTP sensor and at the ECM E NO Go to step 6 cont d 11 173 EVAP System DTC Troubleshooting cont d 11 Turn the ignition switch OFF 7 Reinstall the fuel fill cap 8 Disconnect the FTP sensor 3P connector Turn the ignition switch ON II 10 Measure voltage between FTP sensor 3P connector terminals No 1 and No 2 FTP SENSOR 3P CONNECTOR SG3 Wire side of female terminals Is there about 5 V YES Go to step 11 NO Repair open in the wire between the FTP sensor and the ECM E4 11 174 12 Measure voltage between FTP sensor 3P connector terminals No 2 and No 3 FTP SENSOR 3P CONNECTOR il FTP LT GRN SG3 Wire side of female terminals Is there about 5 V Y
163. tions or loose terminals at all connectors related to the circuit that you are troubleshooting Opens and Shorts Open and Short are common electrical terms An open is a break in a wire or at a connection A short is an accidental connection of a wire to ground or to another wire In simple electronics this usually means something won t work at all With complex electronics such as ECMs this can sometimes mean something works but not the way it s supposed to How to Use the PGM Tester or a Scan Tool 3 Turn the ignition switch ON 11 If the MIL Malfunction Indicator Lamp has come on 4 Check the Diagnostic Trouble Code DTC and note 1 Start the engine and check the MIL A it Also check the freeze data Refer to the DTC Troubleshooting Index and begin the appropriate 1 o NOTE If the ignition switch is turned ON H and troubleshooting procedure the engine is not started the MIL will stay on for 15 20 seconds see page 11 46 5 If you do not find any DTCs go to MIL circuit troubleshooting see page 11 97 NOTE Freeze data indicates the engine conditions when the first malfunction misfire or fuel trim malfunction was detected The scan tool and the Honda PGM Tester can read the DTC freeze data current data and other Engine Control Module ECM data For specific operations refer to the user s manual that came with the scan tool or Honda PGM Tester If the MIL did not stay If the MIL
164. tle 5 Check for a Temporary DTC with the scan tool Is Temporary DTC P1106 indicated YES Update the ECM if it does not have the latest software or substitute a known good ECM then original NO Intermittent failure system is OK at this time m recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original NO Intermittent failure system is OK at this time 11 83 PGM FI System DTC Troubleshooting cont d DTC P1157 A F Sensor Sensor 1 Range Performance Problem 1 Reset the ECM see page 11 4 2 Start the engine Is DTC P1157 indicated YES Go to step 3 NO Intermittent failure system is OK at this time Check for poor connections or loose terminals at the A F sensor Sensor 1 and at the ECM E 3 Turn the ignition switch OFF 4 Disconnect the A F sensor Sensor 1 4P connector and ECM connector A 31P 5 Connect A F sensor Sensor 1 4P connector terminals No 1 and No 2 with a jumper wire A F SENSOR SENSOR 1 4P CONNECTOR AFS BLU AFS GRN JUMPER WIRE Wire side of female terminals 11 84 6 Check for continuity between ECM connector terminals A6 and A16 ECM CONNECTOR A 31 AFS RED AFS RED YEL Wire side of female terminals Is there continuity YES Go to step 9 NO Go to step 7 7 Connect A F sensor Sensor 1 4P connector terminal No
165. to step 4 NO Replace the FTP sensor FTP LT GRN 4 Turn the ignition switch OFF Wire side of female terminals 5 Disconnect the hose between the EVAP two way valve and the FTP sensor at the EVAP two way valve end 9 The voltage should smoothly drop from about 2 5 V to about 1 5 V Stop applying vacuum when the voltage drops to about 1 5 V or damage to the FTP sensor may Does the voltage drop to about 1 5 V and hold YES Check for misrouted leaking or broken FTP sensor vacuum lines If the vacuum lines are OK update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the original ECM E NO Replace the FTP sensor Bi EVAP System DTC Troubleshooting cont d 4 DTC P0452 FTP Sensor Circuit Low Voltage 6 Turn the ignition switch OFF 1 Check the vacuum lines at the FTP sensor for misrouting leakage breakage or clogging Are the vacuum lines OK YES Go to step 2 NO Repair or replace vacuum lines as necessary 2 Reset the ECM see page 11 4 3 Remove the fuel fill cap 4 Turn the ignition switch ON Il 5 Monitor FTP sensor voltage with the Honda PGM Tester or measure voltage between body ground and ECM connector terminal E14 ECM CONNECTOR E 31P DAE hae Wire side of female terminals Is there about 2
166. to step 6 Turn the ignition switch OFF Remove the auto tensioner see page 4 28 cont d 11 119 VTEC VTC DTC Troubleshooting cont d 8 Remove the VTC strainer A Check the VTC strainer for clogging Is the strainer OK YES Go to step 9 NO Clean the VTC strainer then replace the engine oil filter and the engine oil li 9 Check the VTC oil control solenoid valve see page 11 127 Is the VTC oil control solenoid valve OK YES Go to step 10 NO Clean the ports of the VTC oil control solenoid valve or replace the VTC oil control solenoid valve see page 11 127 8 10 Install the VTC oil control solenoid valve 11 Start the engine Hold the engine at 700 1 000 rpm 12 Connect ECM connector terminal B23 to body ground with a jumper wire ECM CONNECTOR B 24 2131415 617 8 9 10 13 7115 8 VTC JUMPER BLK WHT WIRE Wire side of female terminais 11 120 13 Connect ECM connector terminals A3 and B1 with a jumper wire momentarily NOTE Do not jump for more than 1 minute ECM CONNECTORS IGP1 YEL BLK 31 JUMPER WIRE VTC BLU WHT Wire side of female terminals Did the engine stall or run rough YES Test drive at a steady speed between 20 40 mph 30 60 km h for 10 minutes If temporary DTC P0011 is indicated update the ECM if it does not have the latest software or
167. uity YES Repair short in the wire between the A F sensor Sensor 1 and the ECM A16 NO Go to step 6 cont d 11 85 PGM FI System DTC Troubleshooting cont d 6 Substitute a known good A F sensor Sensor 1 and DTC P1159 A F Sensor Sensor 1 AFS recheck Terminal Low Voltage Is DTC P1158 indicated 1 Reset the ECM see page 11 4 YES Update the ECM if it does not have the latest 2 Start the engine software or substitute a known good ECM then recheck see page 11 6 if the symptom indication IsDTC P1159 indicated goes away with a known good ECM replace the original YES Go to step 3 NO Replace the A F sensor Sensor 1 intermittent failure system is OK at this time Check for poor connections or loose terminals at the A F sensor Sensor 1 and at the 3 Turn the ignition switch OFF 4 Disconnect the A F sensor Sensor 1 4P connector and ECM connector A 31P 5 Check for continuity between ECM connector terminal A6 and body ground ECM CONNECTOR A 31 AFS RED Wire side of female terminals Is there continuity YES Repair short in the wire between the A F sensor Sensor 1 and the ECM NO Go to step 6 11 86 6 Substitute a known good A F sensor Sensor 1 and recheck Is DTC P1159 indicated YES Update the ECM if it does not have the latest software or substitute a known g
168. unctions of the fuel and emission control systems are managed by the engine control module ECM Fail safe Function When an abnormality occurs in the signal from a sensor the ECM ignores that signal and assumes a pre programmed value for that sensor that allows the engine to continue to run Back up Function When an abnormality occurs in the ECM the injectors are controlled by a back up circuit independent of the system to permit minimal driving Self diagnosis When an abnormality occurs in the signal from a sensor the ECM supplies ground for the malfunction indicator lamp MIL and stores the diagnostic trouble code DTC in erasable memory When the ignition is first turned on the ECM supplies ground to the MIL for 15 to 20 seconds to check the MIL bulb condition Two Driving Cycle Detection Method To prevent false indications the two driving cycle detection method is used for some self diagnostic functions When an abnormality occurs the ECM stores it in its memory When the same abnormality recurs after the ignition switch is turned OFF and ON II again the ECM turns on the MIL 11 12 ECM Data lt You can retrieve data from the ECM by connecting the OBD II scan tool or the Honda PGM Tester to the data link connector DLC The items listed in the table below conform to SAE recommended practice The Honda PGM Tester also reads data beyond that recommended by SAE to help you find the causes of intermittent problems
169. ures The fuel feed hose B fuel tube D and quick connect fittings F are not acid proof do not touch them with a shop towel which was used for wiping battery electrolyte Replace them if they came into contact with electrolyte or something similar When connecting or disconnecting the fuel feed hose B fuel tube D and quick connect fittings F be careful not to bend or twist them excessively Replace them it they are damaged A disconnected quick connect fitting can be reconnected but the retainer on the mating line cannot be reused once it has been removed from the line Replace the retainer when replacing the fuel rail replacing the fuel line replacing the fuel pump replacing the fuel filter replacing the fuel gauge sending unit ithas been removed from the line itis damaged PART MANUFACTURER RETAINER COLOR ENGINE GREEN COMPARTMENT FUEL FEED HOSE FUEL LINE SIDE ENGINE TOKAI BLU COMPARTMENT FUEL FEED HOSE FUEL RAIL SIDE FUEL TANK SANOH WHITE UNIT 11 148 lt e Fuel Line Quick Connect Fittings Removal 1 Relieve fuel pressure see page 11 144 4 Check the contact area A of the line B for dirt and damage 2 Check the fuel quick connect fittings for dirt and clean if necessary If the surface is dirty clean it ifthe surface is rusty or damaged replace the 3 Hold the connector A with one hand and sque
170. ut Valve Test 22 Disconnect the vacuum hose from the EVAP canister vent filter A and connect a vacuum pump to the hose 23 Turn the ignition switch ON II 24 Apply vacuum to the hose with five strokes of the pump Does the valve hold vacuum YES Go to step 25 The EVAP canister vent shut valve is OK Go to step 30 25 Turn the ignition switch OFF 26 Disconnect the EVAP canister vent shut valve 2P connector 27 Check for continuity between EVAP canister vent shut valve 2P connector terminal No 2 and body ground EVAP CANISTER VENT SHUT VALVE 2P CONNECTOR LS VSV LT GRN RED Q Wire side of female terminals 28 Is there continuity YES Go to step 28 NO Replace the EVAP canister vent shut valve A and o ring Disconnect ECM connector E 31P Check for continuity between EVAP canister vent solenoid valve 2P connector terminal No 2 and body ground EVAP CANISTER VENT SHUT VALVE 2P CONNECTOR VSV LT GRN RED Wire side of female terminals Is there continuity YES Repair short in the wire between the EVAP canister vent shut valve and the ECM E21 NO Update the ECM if it does not have the latest software or substitute a known good ECM then recheck see page 11 6 If the symptom indication goes away with a known good ECM replace the originat ECM IN P Vacuum Hoses and Connections Test 30 31 32 33 Do the fu
171. ve the passenger s dashboard lower cover see page 20 63 the passenger s kick panel see page 20 63 and the glove box see page 20 63 2 Remove the ECM mounting bolts B and the ECM 9 8 Nm 1 0 kgf m 7 2 Ibf ft 3 Remove the ECM B 4 Install the ECM in the reverse order of removal How to Troubleshoot Circuits at the ECM Special Tools Required Digital Multimeter KS AHM 32 003 1 ora commercially available digital multimeter Backprobe Set 07SAZ 001000A 2 1 Connect the backprobe adapters A to the stacking patch cords B and connect the cords to a digital multimeter C lt 2 Using the wire insulation as a guide for the contoured tip of the backprobe adapter gently slide the tip into the connector from the wire side until it touches the end of the wire terminal If you cannot get to the wire side of the connector or the wire side is sealed A disconnect the connector and probe the terminals B from the terminal side Do not force the probe into the connector NOTICE Do not puncture the insulation on a wire Punctures can cause poor or intermittent electrical connections cont d 11 5 Fuel and Emissions Systems General Troubleshooting Information cont d ECM Updating and Substitution for Testing Special Tools Required Honda Interface Module HIM EQS05A35570 Use this procedure when you have to substitute a known good ECM in a troubleshooting p

02-03 Honda Civic Si Service Manual

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