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2JZ–GTE ENGINE TROUBLESHOOTING

1. 1643p uongumuio JWI BAJRA Aly uas ayeyu JO ASA S POW auiBu3 sosuag dwal set 10122uu07 EG 510 Pia Bafore connection After connection ENGINE 2JZ GTE ENGINE TROUBLESHOOTING STANDARD VALUE OF ECM TERMINALS Connectors of the engine control module are waterproof and are the bolt type For waterproof type connectors in order to measure the voltage of ECM terminals and the resistance of connected parts connect the inspection sub wire harness between the ECM and vehicle wire harness then do the inspection The inspection method of inserting a tester probe from the other side of connector significantly reduces the waterproof perfor mance Disconnect the connector by fully loosening the bolt PREPARATION 1 Turn the ignition switch OFF 2 Turn up the passenger side floor carpet See page EG 324 Remove the ECM protector 4 Disconnect the connector from the ECM After completely loosening the bolt the 2 parts of the connec tor can be separated o9 NOTICE Do not pull the wire harness when disconnecting the con nector When disconnecting the connector the ECM s back up power source is cut off so the malfunction codes etc re corded in the ECM memory are cancelled Never insert a tester probe or male terminal used for in spection purposes into the female terminal of the vehicle wire h
2. T D i aet IL GRG P H Igniter Battery 7 Noise Filter E LJ e EG 520 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE rss LO Check for spark Ea 1 Remove ignition coil See page 10 26 2 Remove spark plug 8 Install the spark plug to the ignition coil and connect the ignition coil connector i 4 Ground the spark plug E Check if spark occurs while engine is being cranked ing this test don t crank the engine for more than 1 2 seconds at a time To prevent excess fuel being injected from injectors dur Check for open and short in harness and connector in IGF signal circuit between engine control module and igniter See page IN 30 Disconnect igniter connector and check voltage between terminal IGF of engine control module connector and body ground ON 1 Disconnect igniter connector m 2 Connect SST check harness SST See page 510 i SST 09990 01000 A 3 Turn ignition switch ON Measure voltage between terminal IGF of engine con trol module connector and body ground Voltage 4 5 5 5 V BEGGS Fi amp H21 Replace igniter Check and replace engine control module EG 521 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Connect SST check harness A See page EG 510 SST 09990 01000 Measure voltage between
3. de Temp F Resistance kil Replace intake air temp sensor Replace mass air flow meter Check for open and short in harness and connector between engine control module and intake air temp sensor See page IN 30 Check and replace engine control module Repair or replace harness or connector EG 534 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 25 26 Air Fuel Ratio Lean Rich Malfunction CIRCUIT DESCRIPTION See EG 525 for the circuit description DTC No Diagnostic Trouble Code Detecting Condition Trouble Area 1 Main heated oxygen sensor voltage is 0 45 V or less lean for 90 sec under conditions a and b 2 trip detection logic a Engine coolant temp 70 C 158 F or more b Engine speed 1 500 rpm or more Engine speed varies by more than 20 rom over the preceding crank angle period during a period of 25 sec or more under conditions a and b 2 trip detection logic a Engine speed Below 950 rpm b Engine coolant temp 80 C 176 F or more Engine speed varies by more than 20 rpm over The preceding crank angle period during a Period of 25 sec or more under conditions a And b 2 trip detection logic a Engine speed Below 950 rpm b Engine coolant temp 80 C 176 F or more See page EG 503 Open or short in main heated oxygen sensor circuit Main heated oxygen sensor Ignition system ECM Open and short in i
4. Constant Sometimes Other Fine o Cloudy Hat n Warm Cool n Suburbs n Other Warming up Highway Rough road Cold Other Starting Just after starting Driving Constant speed Other Conditions When Problem Occurres Engine does not crank Engine does not Start a Difficult t Start Poor Driveability n n Engine Stall a Engine cranks slowly Other Incorrect first idle Rough idling Other Hesitation a Back fire Knocking Problem Symptoms Engine stall soon after starting After accelerator pedal released a When N to D shift n Othar i Condition of Malfunction Indicator Lamp n Remains on Normal Moda Precheck n Mormal code Diagnostic Troubla Code Inspection n Normal code times per B Rainy O Snowy Cold Approx n inner City D After warming up Acceleration Mo initial combustion n idling rpm is abnormal explosion after fire Inspector s Name day month Once only D Various Other Fi Ch Hill ia Up Downi Any temp o Idling Racing without load a Deceleration Mo complete combustion Low Surging 1 High n After accelerator depressed n During A C operation n Sometimes lights up Does not light up a Malfunction code code Malfunctian code code EG 490 Hos34 CHECK ENGINE 2JZ GTE ENGINE TROUBLES
5. 14 V BEG853 o Check and replace engine control module Check continuity between terminal E1 of data link connectors 1 2 and body ground Repair or replace harness or connector Check for open and short in harness and connector between engine control module and data link connectors 1 2 See page IN 30 Check and replace engine control module Repair or replace harness or connector
6. 5 Connect tachometer test probe to terminal IG of data link connector 1 Check Idle speed Idle speed 650 50 rpm Caution Never allow tachometer test probe to touch ground as it could result in damage to igniter and or ignition coil As some tachometers are not compatible with this ignition system we recommended that you confirm the compatibility of your unit before use Proceed to matrix chart of problem symp toms on page EG 514 1 Shift transmission into N position 2 Warm up engine to normal operating tempera ture 3 Keep the engine speed at idle 4 Using SST connect terminals TE1 and E1 of data link connector 1 SST 09843 18020 5 Connect a timing light clip to the check wire See page EG 20 Check ignition timing E Ignition timing 10 2 BTDC idle s a Proceed to page 518 and continue to troubleshoot Proceed to matrix chart of problem symp toms on page EG 514 EG 508 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check fuel pressure ON 1 Be sure that there is enough fuel in the tank 2 Turn ignition switch ON 3 Using SST connect terminals FP and B of data link connector 1 SST _ SST 09843 18020 E Check that there is pressure in the hose from the fuel UM filter If there is fuel pressure you will hear the sound of fuel flowing Never make a mistake with the termina
7. BB km h i50 55 mphl a Idling age i mm or mora 18827 2 min or less 1 Disconnect the EFI No 1 fuse 30A for 10 sec or more with IG switch OFF Initiate test mode Connect terminal TE2 and E1 of data link connector 2 with IG switch OFF 2 Start the engine and warm up with all ACC switched OFF 4 Stop at a safe place and idle the engine for 2 min or less 3 Drive the vehicle at 80 88 km h 50 55 mph for 10 min or more b Accelerate to 96 km h 60 mph with the throttle valve fully open HINT If a malfunction exists the malfunction indicator lamp will light up during step 5 NOTICE If the conditions in this test are not strictly followed detection of the malfunction will not be possible EG 542 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine Control Module INSPECTION PROCEDURE HINT When other codes are output in addition to 27 at the same time check the circuits for other codes first Check voltage between terminal HT2 of engine control module connector and body ground 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON Measure voltage between terminal HT2 of engine control module connector and body ground Voltage 9 14 V EG 543 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Disconnect sub heated oxygen sensor connector See page EG 32
8. Replace ignition coil EG 523 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Disconnect igniter connector and check voltage between terminal IGT 1 6 of engine control module connector and body ground Disconnect igniter connector Measure voltage between terminal IGT 1 6 of engine control module connector and body ground when engine is cranked Ma Voltage 0 5 1 0 V xA n d 55 54 Neither 0 V nor 5 V 200060 During idling check waveforms between terminals IGF1 IGF and E1 of engine control module HINT The correct rectangular waveforms are as shown IGT2 IGT3 IGT4 IGT5 and IGT6 signal wave forms are same as IGT1 signal waveform Check for open and short in harness and connector in IGT 1 6 signal circuit between engine control module and igniter See page IN 30 Repair or replace harness or connector Check and replace engine control module EG 524 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 16 A T Control Signal Malfunction CIRCUIT DESCRIPTION The signal from the A T CPU retards the ignition timing of the engine during A T gear shifting thus momentarily reducing torque output of the engine for smooth clutch operation inside the transmission and reduced shift shock DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Fault in communications between the engine e ECM CPU and A T CPU in the ECM If the ECM detects the diagnostic trouble code 1
9. Trouble Area Open or short in crankshaft position sensor camshaft position sensor No 1 No 2 No or G1 and G2 signal to ECM for 2 sec circuit or more after cranking Crankshaft position sensor Camshaft position sensor No 1 No 2 Starter ECM EG 516 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine Control Module Camshaft Position Senaor 1 Camshaft Position Sensor 2 Crankshaft Position Sensor UT INSPECTION PROCEDURE For crankshaft position sensor remove crankshaft posi tion sensor See page 19 30 For camshaft position sensor No 1 No 2 disconnect camshaft position sensor No 1 No 2 connectors Measure resistance of crankshaft position sensor cam shaft position sensor No 1 and No 2 Lem us 1 400 0 Camshaft 885 1 600 9 Position Sensor Camshaft Position Sensor No 1 and No 2 Cold is from 10 C 14 F to 50 C 122 F and Hot is from 50 C 122 F to 100 C 212 F ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Re INSPECTION USING OSCILLOSCOPE ference G NE Signal Waveforms During cranking or idling check waveforms between terminals G1 G2 and G1 x G2 x NE and NE x of engine control module HINT The correct waveforms are as shown Replace crankshaft position sensor camshaft position sensor No 1 No 2 Check for open and short in harness and connector between engine cont
10. dad Check for open and short in harness and connector between terminal DI of vd engine control module and terminal 6 DI of fuel pump ECU See page IN 30 Repair or replace harness or connector Check and replace engine control module EG 571 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 51 Switch Condition Signal Circuit CIRCUIT DESCRIPTION Park Neutral Position Switch The ECM uses the signals from the park neutral position switch to determine whether the transmission is in park or neutral or in some other position Air Conditioning Switch Signal The ECM uses the output from the air conditioning switch to determine whether or not the air conditioning is operating so that it can increase the idling speed of the engine if necessary Throttle Position Sensor IDL Signal The IDL contacts are mounted in the throttle position sensor and detects the idle condition DTC No Diagnostic Trouble Code Detecting Condition Trouble Area 1 3 sec or more after engine starts with closed throttle position switch OFF Throttle position sensor IDL circuit IDL1 Accelerator pedal and cable 2 Park neutral position switch OFF Park neutral position switch Shift position in R D 2 or 1 A C switch circuit position e ECM 3 A C switch ON HINT In this circuit diagnosis can only be made in the test mode WIRING DIAGRAM Engine Control Madule 1 4 8 31 34 W L R L A AIC EN T mm Ev Es 1 Heate
11. 9 14 V Check and repair mass air flow meter power source circuit Check for open and short in harness and connector between engine control module and mass air flow meter See page IN 30 Replace mass air flow meter Repair or replace harness or connector EG 546 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 34 Turbo Pressure Malfunction CIRCUIT DESCRIPTION To control maximum turbocharging pressure the turbocharger system includes a waste gate valve con trolled by an actuator The actuator is controlled by the manifold pressure which is duty controlled by the VSV based on signals from the ECM If the ECM detects the below diagnosis conditions it operates the fail safe function in which the ECM stops fuel injection VSV for Waste Gate Valve Waste Gate Valve Actuator DTG No Diagnostic Trouble Code Detecting Condition TeubeArm _ All conditions below are detected continuously for 2 sec or more a Manifold absolute pressure Actuator for waste gate valve 200 kPa 2 0 kgf cm 29 psi or more Short in VSV for waste gate valve circuit b Throttle valve opening angle ECM 20 or more c Engine speed 2 400 rpm or more WIRING DIAGRAM EG 547 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Engine Control Madule VSV for Waste Gate Valve Using SST apply pressure to the actuator SST 09992 00241 Waste gate valve operate smoothly Oper
12. it can be concluded that the problem is in the BARO sensor circuit E Check voltage between terminals VCC and E1 of engine control module Qu connector 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON Measure voltage between terminals VCC and E1 of engine control module Voltage 4 5 5 5 V EG 551 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 2 Check voltage between terminals 1 and E2 of engine control module Turn ignition switch ON Measure voltage between terminals PM1 and E2 of engine control module Voltage 2 3 3 0 V Check and replace engine control module Check for open and short in harness and connector between engine control module and turbo pressure sensor See page IN 30 Repair replace harness or connector Replace turbo pressure sensor EG 552 ENGINE CIRCUIT DESCRIPTION The throttle position sensor is mounted in the throttle body and detects the the throttle valve opening angle When the throttle valve is fully closed the IDL contacts in the throttle position sensor are on so the voltage at the terminal IDL of the ECM becomes 0 V At this time a voltage of approximately 0 7 V is applied to the termi nal VTA of the ECM When the throttle valve is opened the IDL contacts go off and thus the power source volt age of approximately 12 V in the ECM is applied to the terminal IDL of the ECM The volt
13. 2 Using SST connect terminals B and FP of data T gt link connector 1 Hm SST 09843 18020 Check that there is pressure in the hose from the fuel filter Fuel pressure can be felt Check for open and short in harness and connector between terminals B B FP FP of the data link connector 1 and fuel pump ECU See page IN 30 Turn ignition switch ON Measure voltage between terminal B of data link nector 1 and body ground Voltage 9 14 V Check for ECM power source circuit See page EG 576 and check for open in harness and connector between terminal B of data link connector 1 and main relay EG 570 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check for open and short in harness and connector between terminal FP of data link connector 1 fuel pump and body ground See page IN 30 Check voltage between terminals 5 FPC and 8 E of fuel pump ECU con nector 1 Remove the LH quarter trim panel START See page EG 323 2 Disconnect fuel pump ECU connector Measure voltage between terminals 5 FPC and 8 E of fuel pump ECU connector when igintion switch is turned to START Voltage 4 5 5 5 V Check for open in harness and connector between terminal FPC of engine control module and terminal 5 FPC of fuel pump ECU terminal 8 E of fuel pump ECU and body ground See IN 30 Repair or replace harness or connector
14. and replace engine control module EG 540 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 27 Sub Heated Oxygen Sensor Circuit CIRCUIT DESCRIPTION The sub heated oxygen sensor is installed on the exhaust pipe Its construction and operation is the same as the main heated oxygen sensor on page EG 525 DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Open or short in heater circuit of sub heated 1 Open or short in heater circuit of sub Oxygen sensor heated oxygen sensor for 0 5 sec or more Sub heated oxygen sensor heater ECM Main heated oxygen sensor signal is 0 45 V or more and sub heated oxygen sensor signal is 0 45 V or less under conditions a Open or short in sub heated oxygen sensor 2 trip detection logic circuit a Engine coolant temp 80 C 176 F Sub heated oxygen sensor or more ECM b Engine speed 1 500 rpm or more c Accel pedal Fully depressed for 2 sec or more See page EG 503 EG 541 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING CIRCUIT DESCRIPTION Cont d DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern a To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded b To check that the malfunction is corrected when the repair is completed confirming that diagnostic trouble code is no longer detected Malfunction Open or Short in Sub Heated Oxygen Sensor Detection 6 km h 60 mphl 80
15. be open Check voltage between terminals THW and E2 of engine control module connector 1 Connect SST check harness A See page EG 510 2 Turn ignition switch ON Measure voltage between terminals THW and E2 of engine control module connector Engine Coolant Temp F 20 68 Engine is cool 80 176 Engine is het Check for intermittent problems See page EG 505 2 Check engine coolant temp sensor Disconnect the engine coolant temp sensor con nector Measure resistance between terminals Resistance is within Acceptale Zone on chart Engine T weer 0 Acceptable s qu LER 20 883 z Aki wmm i 2 1 I Br a J0 a6 Ag 4 an aD I A TEE 123 Temp Fh NG Replace engine coolant temp sensor Check for open and short in harness and connector between engine control module and engine coolant temp sensor See page IN 30 Resistance kil Repair or replace harness or connector Check and replace engine control module EG 532 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 24 Intake Air Temp Sensor Circuit CIRCUIT DESCRIPTION The intake air temp sensor is built into the mass air flow meter and senses the intake air temperature The struc ture of the sensor and connection to the ECM is the same as in the engine coolant temp sensor s
16. exists the Malfunction Indicator Lamp will light up after approx 60 sec from the start of acceleration NOTICE If the conditions in this test are not strictly followed detection of the malfunc tion will not be possible EG 527 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Main Heated JEg 5 m AE AL Ter mus LX U mi Heared j Sensor meei FT perna INSPECTION PROCEDURE Oxygen Sensor gt Engine Control Module B L M Feet ____ Linde Connects x LG ENG 7 Check voltage between terminals HT1 of engine control module connector and body ground Connect SST check hamess A See page EG 510 SST 09990 01000 Measure voltage between terminals HT1 of engine control module connector and body ground Voltage 9 14 V EG 528 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check main heated oxygen sensor heater Disconnect main heated oxygen sensor connector Measure resistance between terminals 1 and 2 of main heated oxygen sensor connector Resistance 11 16 at 20 C 68 F Replace main heated oxygen sensor Check and repair harness or connector between main relay and main heated oxygen sensor main heated oxygen sensor and engine control module Check voltage between terminals HT1 of engine control module connector and body ground Warm up engine to normal operating temperature Measure voltage between terminals H
17. is applied to the engine sid coolant temperature sensor from the terminal THW nal via a resistor R That is the resistor R and the engine TON coolant temperature sensor are connected in series Tee PE When the resistance value of th engine coolant tem Him Temperature F perature sensor changes in accordance with changes in the coolant temperature the potential at the termi Reference nal THW also changes Based on this signal the ECM increases the fuel injection volume to improve drive ability during cold engine operation If the ECM re cords the diagnostic trouble code 22 it operates the fail safe function in which the engine coolant tempera ture is assumed to be 80 C 176 F Resistance kil Engine Coolant Temp i oF amp 0 140 Trouble Area Diagnostic Trouble Code Detecting Condition Open or short in engine coolant temp sensor circuit Engine coolant temp sensor ECM Open or short in engine coolant temp sensor circuit for 0 5 sec or more WIRING DIAGRAM Engine Control Module Engine Coolant Temp Sensor ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT EG 531 If diagnostic trouble codes 22 engine coolant temperature sensor circuit 24 intake air temperature sensor circuit and 41 throttle position sensor circuit are output simultaneously E2 sensor ground may
18. normal operating temperature Measure voltage between terminal EGR of engine con trol module connector and body ground T3 Voltage 9 14 V Remove VSV for EGR See page EG 310 Measure resistance between terminals of VSV for EGR Resistance 30 343 at 20 C 68 F No Replace VSV for EGR Check for open and short in harness and connector between EFI main relay and VSV for EGR VSV for EGR and engine control module See page IN 30 Check and replace engine control module Repair or replace harness or connector EG 567 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING EE Check EGR system See page EG 180 DESC Remove EGR gas temp sensor Measure resistance between terminals of EGR gas temp sensor connector EI Resistance 64 973 k at 50 C 122 F 11 163 k at 100 C 212 F 2 3kat 150 C 302 F Replace EGR gas temp sensor Check for open in harness and connector between EGR gas temp sensor and engine control module See page IN 30 Ne Repair or replace harness or connector Check and replace engine control module EG 568 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 78 Fuel Pump Control Circuit CIRCUIT DESCRIPTION The fuel pump speed is controlled at 2 steps high speed low speed by the condition of the engine starting light load heavy load when the engine starts STA ON the engine co
19. open and short in harness and connector between terminals REL of engine control module and body ground See page 13 30 Repair or replace harness connector Check and repair harness or connector between EFI No 1 fuse and battery EG 581 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Back Up Power Source Circuit CIRCUIT DESCRIPTION Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is off for use by the diagnostic trouble code memory and air fuel ratio adaptive control value memory etc WIRING DIAGRAM Engine Control Module EG 582 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE heck EFI No 1 Fuse Remove EFI No 1 fuse from R B No 2 Check continuity of EFI No 1 fuse Continuity EFI i 1 Fuse WB No 2 Check for short in the harness and all the compo nents connected to EFI No 1 fuse See attached wiring diagram gt Check voltage between terminal BATT of engine control module connector 1 and body ground Connect SST check harness A See page 510 SST 09990 01000 Measure voltage between terminal BATT of en gine control module connector and body ground Voltage 9 14 V Check and repair harness or connector between engine control module and EFI No 1 fuse EFI No 1 fuse and battery p EA Are the diagnostic trouble codes still in the memory when the ignition switc
20. terminal IGT 1 6 of engine control module connector and body ground when en gine is cranked Voltage 0 5 1 0 V Neither 0 V nor 5 V IGT1 IGT2 IGT3 IGT4 IGTS IGTG amp BEBOP3 Fee Reference INSPECTION USING OSCILLOSCOPE _ IGT1 IGF Signal Waveforms 3 12 ViDiv During idling check waveforms between termi a nals IGT1 IGF and E1 of engine control module HINT The correct rectangular waveforms are as shown IGT2 IGT3 IGT4 IGT5 and IGT6 signal waveforms are same as IGT1 signal waveform 5 Check voltage between terminal 2 of igniter connector 12 and body ground ON and START CN P Measure voltage between terminal 2 of igniter connec tor 12 and body ground when ignition switch is turned to ON and and START position Disconnect igniter connector Voltage 9 14 V Check and repair igniter power source circuit EG 522 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 6 Replace igniter Check for open and short in harness and connector between ignition switch and ignition coil ignition coil and igniter See page IN 30 Repair or replace harness or connector Disconnect ignition coil connector See page 16 23 Measure resistance between terminals of ignition coil connector Resistance 0 54 0 84 0 68 0 98 0 Cold is from 10 C 14 F to 50 C 122 F and Hot is from 50 C 122 F to 100 C 212
21. terminals on the data link connector 2 should be connected as shown later See page EG 492 In the test mode even if the malfunction is corrected the malfunc tion code is stored in the ECM memory even when the ignition switch OFF except code Nos 43 and 51 The also applies in the normal mode The diagnostic trouble mode normal or test and the output of the malfunction indicator lamp can be selected by connecting the TE1 TE2 and E1 terminals on the data link con nector 2 as shown later A test mode function has been added to the functions of the self diagnosis system of the normal mode for the purpose of detecting malfunctions such as poor contact which are difficult to detect in the normal mode This function fills up the self diagnosis system The test mode can be implemented by the technician following the appropriate procedures of check terminal connection and opera tion described later See page EG 492 EG 491 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Diagnosis Inspection Normal Mode MALFUNCTION INDICATOR LAMP CHECK 1 The Malfunction Indicator Lamp will come on when the ignition switch is turned ON and the engine is not running HINT If the malfunction indicator lamp does not light up pro ceed to troubleshooting of the telltale light RH See page BE 48 2 When the engine is started the malfunction indicator lamp should go off If the light remains on the diagnosis system has detected a malfunction or abnorm
22. throttle position sensor s is disconnected diagnostic trouble code 41 or 47 is not displayed Diagnostic trouble code 41 or 47 is displayed only when there is an open or short in the VTA signal circuit of the throttle position sensor s e Signals from the throttle position sensor s are also input to the TRAC ECU so when a malfunc tion occurs on the TRAC side code 41 or 47 may be displayed EG 553 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine Control Module Throttle Position Sensor EG 554 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT If diagnostic trouble code 41 is displayed check throttle position sensor circuit If diagnostic trouble code 47 is displayed check sub throttle position sensor circuit If diagnostic trouble code 22 engine coolant temperature sensor circuit 24 intake air temperature sensor circuit and 41 throttle position sensor circuit are output simultaneously E2 sensor ground may be open ZEE Check voltage between terminals VTA1 2 IDL1 2 and E2 of engine control __ module connector 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON 8 For throttle position sensor disconnect the vacuum hose from the throttle body then apply vacuum to the throttle opener See page EG 292 4 For sub throttle position sensor remove intake air duct and disconnect sub throttle valve step m
23. trouble code in memory and set the test mode if the malfunction indicator lamp does not go off after the engine is started check thoroughly for faulty con tacts etc then try the check again if the malfunction indicator lamp still does not go off check and replace ECM EG 506 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING BASIC INSPECTION In many cases by carrying out the basic engine check shown in the following flow chart the location causing the problem can be found quickly and efficiently Therefore use of this check is essential in engine troubleshoot ing If there is a problem and a normal code is displayed proceed to the matrix chart of problem symptoms on page EG 514 Make sure that every likely cause of the problem is checked Is battery positive voltage 11 V or more when engine is stopped Proceed to matrix chart of problem symptom on page EG 514 Go to step 34 M Check air filter Remove air filter Visually check that the air filter is not excessively dirty or oily If necessary clean the air filter with compressed air First blow from inside thoroughly then blow from outside of the air filter Repair or replace EG 507 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check idle speed m 1 Shift transmission into position 2 Warm up engine to normal operating tempera ture 3 Switch OFF all accessories 4 Switch OFF air conditioning
24. 1 Measure resistance between terminals 1 and 2 of sub heated oxygen sensor connector Resistance 11 16 at 20 68 F Check voltage between terminal HT2 of engine control module connector and body ground Warm up engine to normal operating temperature Measure voltage between terminal HT2 of engine control module connector and body ground when engine is idling and racing at 3 500 rpm MUT wee Ww Ov Racing at 3 500 rpm Ne ok Replace sub heated oxygen sensor It is probable the oxygen sensor has deteri orated Check and replace engine control module Usually this cannot be confirmed by visual inspection EG 544 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 31 Mass Air Flow Meter Circuit CIRCUIT DESCRIPTION The mass air flow meter is an air flow meter which uses a platinum hot wire The hot wire air flow meter works on the principle that when the electrically heated platinum hot wire is positioned inside the intake air bypass the intake air volume can be calculated according to the change in the hot wire temperature This change in temperature is measured by the thermistor at the rear of the hot wire And feedback from the circuit maintains the hot wire at a set temperature by controlling the current flowing through the hot wire This current flow is then measured as the output voltage of the air flow meter The circuit is constructed so that the platinum hot wire and the
25. 2 000 rpm for 90 sec HINT If a malfunction exists the malfunction indicator lamp will light up during step 4 NOTICE If the conditions in this test are not strictly followed detection of the malfunction will not be possible EG 536 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING CIRCUIT DESCRIPTION Cont d DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern a To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded b To check that the malfunction is corrected when the repair is completed confirming that diagnostic trouble code is no longer detected Malfunction Open or Short in Injector circuit Injector Leak or Blockage irnm Detection IG SW OFF 1 Disconnect the EFI No 1 fuse 30A for 10 sec or more with IG switch OFF Initiate test mode Connect terminal TE2 and E1 of data link connector 2 with IG switch OFF 2 Start the engine and warm up with all ACC switched OFF 3 Idle the engine for 5 min After the entine is started do not depress the accelertor pedal HINT If a malfunction exists the malfunction indicator lamp will light up during the 5 min idling period NOTICE If the conditions in this test are not strictly followed detection of the malfunction will not be possible WIRING DIAGRAM See page EG 527 for the WIRING DIAGRAM EG 537 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE Che
26. 6 in memory it prohibits the torque control of the A T which performs smooth gear shifting Go to relevant diagnostic trouble code chart Replace engine control module EG 525 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 21 Main Heated Oxygen Sensor Circuit CIRCUIT DESCRIPTION To obtain a high purification rate for the CO HC and NOx components of the exhaust gas a three way catalytic converter is used but for most efficient use of the three way catalytic converter the air fuel ratio must be precisely controlled so that it is always close to the stoichiometric air fuel ratio The oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity of the stoichiometric air fuel ratio This characteristic is used to detect the oxygen concentration in the exhaust gas and provide feedback to the computer for control of the air fuel ratio When the air fuel ratio becomes LEAN the oxygen concentration in the exhaust increases and the oxygen sensor informs the ECM of the LEAN condition small electromotive force 0 V When the air fuel ratio is RICHER than the stoichiometric air fuel ratio the oxygen concentration in the exhaust gas is reduced and the oxygen sensor informs the ECM of the RICH condition large electro motive force 1 V The ECm judges by the electromotive force from the oxygen sensor whether the air fuel ratio if RICH or LEAN and controls the injection duration accordingly How
27. 8 msec IGNITION Increase engine speed Gradually increases Engine idling at normal operating temp 20 30 steps A C switch ON Step increases AEPA A T shifting in D position Step increases Ignition switch ON Engine off Approx 125 steps ENGINE SPEED RPM kept stable Comparison with tachometer No great changes MAF Engine idling at normal operating temp 1 Approx 3 8 g s Increase engine speed Gradually increases A CT Engine at normal operating temp 75 95 C 185 203 F Closed throttle position Below 5 THROTTLE Wide open throttle Above 70 From closed throttle position to wide open throttle Gradually increases VEHICLE SPD During riving No large differences Comparison with speedometer PNP SIGNAL 4 When shifting from P or position into a position m other than P or N OxL RPM stable at 2 500 rpm with normal operating temp RICH LEAN is repeated 1 All accessories and A C switched OFF 2 If the engine coolant temp sensor circuit is open or shorted the ECM assumes an engine coolant temp value of 80 C 176 F 3 When feedback control is forbidden 0 V is displayed 4 A T only EG 514 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING MATRIX CHART OF PROBLEM SYMPTOMS When the malfunction code is not confirmed in the diagnostic trouble code check and the problem still can not be confirmed in the basic inspection proceed to this matrix chart and troubleshoot according to the numbered order
28. E01 B80 2 1 B50 KNK2 49 1 B69 IG switch ON Other shift position in P N position IG switch ON Shift position in P N position 9 14 NSW 76 1 B69 0 3 0 Pulse generation IG switch ON EERE See page 556 Rotate driving wheel slowly 9 14 IG switch ON TE2 19 1 B69 14 IG switch ON W A6 E1 B69 m ldling Bee O 0 30 IG switch pt ACswtchON Midig ACMG A23 E1 B69 pt witch OFF Po Below 2 0 Restarting at high engine coolant temp p15 Befoggersswihandtallight switch OFF VSV1 B40 E1 B69 te dia O ling O Idling for M T Below 3 0 Idling and shift position P N position B60 E1 B69 for AT 9 14 Idling and other shift position P N position for A T PM1 B62 E2 A65 2 3 3 0 IG switch ON 18 24 IG switch and apply vacuum 26 7 kPa 200 mmHg 7 9 in Hg 9 EG 513 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING REFERENCE VALUE OF ECM DATA HINT ECM data can be monitored by TOYOTA hand held tester 1 Hook up the TOYOTA hand held tester to DLC2 2 Monitor ECM data by following the prompts on the tester screen Please refer to the TOYOTA hand held tester operator s manual for further details REFERENCE VALUE Inspection condition Reference value INJECTOR Engine cold to hot M Gradually decreases Engine idling at normal operating temp Approx 1
29. EG 487 2JZ GTE ENGINE TROUBLESHOOTING EG 488 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING HOW TO PROCEED WITH TROUBLESHOOTING Troubleshoot in accordance with the procedure on the following pages Titles inside 7 are titles of pages in this manual with the page number indicated in the bottom portion LU Sd Problem Analysis See the indicated pages for de tailed explanations EG 489 2 Vehicle Brought to Workshop Check and Clear Diagnostic Trouble Code Precheck P EG 491 P T EG 493 3 Setting the Test Mode Diagnosis j v EG 492 4 Problem Symptom Confirmation 11 Malfunction does not occur Malfunction 5 Symptom Simulation occurs IN 24 Diagnostic Trouble Code Check P Normal code 4l FG 492 J Malfunction code Basic Inspecti on 8 Diagnostic Trouble Code Chart j P ay EG 506 EG 494 8 Matrix Chart of Problem Symptoms f EG 514 Circuit Inspection EG 515 Parts Inspection Check for Intermittent problems EG 505 Identification of Problem r3 Adjustment Repair 14 Conformation Test Step 2 3 11 14 Diagnostic steps permitting the use of the TOYOTA hand held tester or TOYOTA break out box ENGINE EG 489 2JZ GTE ENGINE TROUBLESHOOTING CUSTOMER PROBLEM ANALYSIS CHECK SHEET ENGINE CONTROL System Check Sheet Date Vehicle Brought In Frequency Problem Occurs
30. ER GREE After accelerator pedal depressed 2 1 After accelerator pac released i During A C operation mM When shifting N to D 1 EG 515 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING CIRCUIT INSPECTION DTC 12 G NE Signal Circuit No 1 CIRCUIT DESCRIPTION Camshaft position sensors G1 and G2 signals are mounted on the intake side of the cylinder head and the crankshaft position sensor NE signal is mounted on the oil pump body These sensors consist of a timing rotor and pick up coil The G1 G2 timing rotors have 1 tooth each on their outer circumference and are mounted on the intake camshaft When the intake camshaft rotates the protrusion on the timing rotors and the air gap on the pick up coil change causing fluctions in the magnetic field and generating an electromotive force in the pick up coil The NE timing rotor has 12 teeth and is mounted on the crankshaft The NE signal sensor generates 12 NE signals per engine revolution The ECM detects the standard crankshaft angle based on the G1 G2 signals and the actual crankshaft angle and the engine speed by the NE signals Cylinder Head Front Air aa m ON TEL ae Camshaft Position Intake Sensor No 2 G21 Camshaft ou Doslion Camshaft Position Sensor NES 5 Ma 1 i11 Timing Rotor ansor Timing Rotor Crankshaft Timing Pulley 2 Peto FIBO21 Fiat Diagnostic Trouble Code Detecting Condition
31. HOOTING DIAGNOSIS SYSTEM DESCRIPTION The ECM contains a built in self diagnosis system by which troubles with the engine signal network are detected and a Mal function Indicator Lamp on the instrument panel lights up By analyzing various signals as shown in a later table See page EG 494 the Engine Control Module ECM detects system mal functions relating to the sensors or actuators In the normal mode the self diagnosis system monitors 19 items indicated by code No as shown in EG 494 A malfunction indica tor lamp informs the driver that a malfunction has been detected The lamp goes off automatically when the malfunction has been repaired but the diagnostic trouble code s remains stored in the ECM memory except for code Nos 16 and 53 The ECM stores the code s until it is cleared by removing the EFI No 1 fuse with the ignition switch OFF The diagnostic trouble code can be read by the number of blinks of the malfunction indicator lamp when TE1 and E1 terminals on the data link connector 1 or 2 are connected When 2 or more codes are indicated the lowest number code will appear first In the test mode 13 items indicated by code No as shown in EG 494 are monitored If a malfunction is detected in any one of the systems indicated by code Nos 13 21 22 24 25 26 27 35 41 47 71 and 78 the ECM lights the malfunction indicator lamp to warn the technician that a malfunction has been detected In this case TE2 and E1
32. IRCUIT DESCRIPTION Cont d DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern a To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded b To check that the malfunction is corrected when the repair is completed confirming that diagnostic trouble code is no longer detected Malfunction Main Heated Oxygen Sensor Deterioration Vehicle Speed 80 km h 50 mph 64 km h 4D mph Idling IG SW OFF i 1 2 min It is vital that this test routine is adhered to detect the malfunction 1 Disconnect the EFI No 1 fuse 30 A for 10 sec or more with IG switch OFF Initiate test mode Connect terminal TE2 and E1 of data link connector 2 with IG switch OFF 2 Start the engine and warm up with all ACC switch OFF 3 Idle the engine for 3 min 4 Accelerate gradually within the range 1 300 1 7700 rpm centered around 1 500 rpm with the A C switch ON and D position for A T 5th for M T HINT Ensure engine rpm does NOT fall below 1200 rpm Gradually depress the accelerator pedal at a suitable rate to comply with the test re quirements on the above graph Never allow engine rpm to drop at any time during the test 5 Maintain the vehicle speed at 64 80 km h 40 50 mph 6 Keep the vehicle running for 2 min after starting acceleration HINT If a malfunction
33. ROUBLESHOOTING DIAGNOSTIC TROUBLE CODE CHECK USING TOYOTA HAND HELD TESTER 1 Hook up the TOYOTA hand held tester to the DLC2 2 Read the diagnostic trouble codes by following the prompts on the tester screen Please refer to the TOYOTA hand held tester operation s manual for further details DIAGNOSTIC TROUBLE CODE CLEARANCE 1 After repair of the trouble areas the diagnostic trouble code retained in the ECM memory must be cleared out by removing the EFI No 1 fuse 30A from R B No 2 for 10 seconds or more with the ignition switch OFF HINT e Cancellation can also be done by removing the negative terminal cable from the battery but in this case other memory systems clock etc will also be cancelled out e f itis necessary to work on engine components requiring removal of the negative terminal cable from the battery a check must first be made to see if a diagnostic trouble code has been recorded 2 After cancellation road test the vehicle to check that a normal code is now read on the malfunction indicator lamp If the same diagnostic trouble code appears it indicates that the trouble area has not been repaired thoroughly ECM DATA MONITOR USING TOYOTA HAND HELD TESTER 1 Hook up the TOYOTA hand held tester to the DLC2 2 Monitor the ECM data by following the prompts on the tester screen HINT TOYOTA hand held tester has a Snapshot function which records the monitored data Please refe
34. SHOOTING 1 Remove throttle body See page EG 291 2 Apply vacuum to throttle opener See page EG 292 Measure resistance between terminals 3 IDL1 and 4 E2 of throttle position sensor connector Vans Fully closed Less than 0 5 kt T MA higher i Adjust or replace throttle position sensor See page EG 292 I Check voltage between terminal A C of engine control module connector and body ground 1 Connect SST check harness See page 510 SST 09990 01000 2 Start the engine Measure voltage between terminal A C of engine control module and body ground Check A C compressor circuit See page EG 62 Check and replace engine control module EG 574 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Park Neutral Position Switch Circuit CIRCUIT DESCRIPTION The park neutral position switch goes on when the shift lever is in the N or P shift position When it goes on the terminal NSW of the ECM is grounded to body ground via the starter relay and theft deterrent ECU thus the terminal NSW voltage becomes 0 V When the shift lever is in the D 2 L or R position the park neutral position switch goes off so the voltage of ECM terminal NSW becomes positive battery voltage the voltage of the ECM internal power source If the shift lever is moved from the N position to the D position this signal is used for air fuel ratio correction and for idle speed cont
35. T1 of engine control module connector and body ground when engine is idling and racing at 4 000 rpm Voltage In the 4 000 rpm racing check continue engine racing at 4 000 rpm for approx 20 seconds or more na Replace main heated oxygen sensor It is probable the oxygen sensor has deteri Check and replace engine control module orated Usually this cannot be confirmed by i visual inspection EG 529 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Reference INSPECTION USING OSCILLOSCOPE With the engine racing 4 000 rpm measure waveform between terminals OX1 and E1 of engine control module HINT The correct waveform is as shown oscillating between approx 0 1 V and 0 9 V If the oxygen sensor has deteriorated the amplitude of the voltage will be reduced as shown on the left 200 maec Divisian EG 530 ENGINE _2JZ GTE ENGINE TROUBLESHOOTING DTC 22 Engine Coolant Temp Sensor Circuit CIRCUIT DESCRIPTION The engine coolant temperature sensor senses the coolant temperature A thermistor built in the sensor Fig 11 changes its resistance value according to the coolant s temperature The lower the coolant temperature the 2 greater the thermistor resistance value and the high Acceptable er the coolant temperature the lower the thermistor resistance value See Fig 1 The engine coolant temperature sensor is connected to the ECM See wiring diagram The 5 V power ast source voltage in the ECM
36. TING DTC 14 Ignition Signal Circuit CIRCUIT DESCRIPTION The ECM determines the ignition timing turns on Tr at a predetermined angle CA before the desired ignition timing and outputs an ignition signal IGT 1 to the igniter Since the width of the IGT signal is constant the dwell angle control circuit in the igniter determines the time the control circuit starts primary current flow to the ignition coil based on the engine rpm and ignition timing one revolution ago that is the time the Tro turns on When it reaches the ignition timing the ECM turns Tr off and outputs the IGT signal O This turns Tro off interrupting the primary current flow and generating a high voltage in the secondary coil which causes the spark plug to spark Also by the counter electromotive force generated when the primary current is interrupted the igniter sends an ignition confirmation signal IGF to the ECM The ECM stops fuel injection as a fail safe function when the IGF signal is not input to the ECM DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Open or short in IGF circuit from igniter to ECM gniter ECM No IGF signal to ECM for 4 7 consecutive IGT signals with engine speed less than 3 000 rom WIRING DIAGRAM Engine Control Module B 8 0 nr Spark Plug 2012 1 BO G Try T Aw Dr 1 0 ue d ns lg 2j ci ao n Ignition Switch zx GRE AE B
37. ability in the test mode is increased compared to that in the normal mode so that when intermittent problems occur in the ECM signal circuits G1 G2 NE THW THA VTA1 VTA2 shown in the table below the appropriate diagnostic trouble code is output Accordingly when the diagnostic trouble codes shown in the table opposite 13 22 24 41 47 are output during the diagnostic trouble code check and inspection of the appropriate circuits re veals no abnormality check for intermittent problems as described below By checking for intermittent problems the place where intermittent problems are occurring due to poor contacts can be isolated CLEAR DIAGNOSTIC TROUBLE CODES See page EG 493 SET TEST MODE 1 With the ignition switch OFF using SST connect the terminals TE2 and E1 of the data link connector 2 SST 09843 18020 2 Start the engine and check to see the malfunction indicator lamp goes off PERFORM A SIMULATION TEST Using the symptom simulation See page IN 24 apply vibration to and pull lightly on the wire harness connector or terminals in the circuit indicated by the malfunction code In this test if the malfunction indicator lamp lights up it indicates that the place where the wire harness connector or terminals be ing pulled or vibrated has faulty contact Check that point for loose connections dirt on the terminals poor fit or other problems and repair as necessary HINT After cancelling out the diagnostic
38. afe function in which the ECM stops fuel injection at engine speed 2 400 rpm or more and throttle opening angle 20 or more DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Open or short in turbo Open or short in turbo pressure sensor pressure sensor circuit circuit for 0 5 sec or more Turbo pressure sensor ECM Turbo Pressure Sensor 2 BARO SENSOR This sensor is built into the ECM It is used to detect the atmospheric absolute pressure and outputs corre sponding electrical signals Fluctuations in the air pressure cause changes in the intake air density which can cause deviations in the air fuel ratio The signals from BARO sensor are used to make corrections for the fluctuations If the ECM detects the below diagnosis conditions it operates the fail safe function in which the atmospheric pressure is assumed to be 101 3 kPa 1 03 kgf cm 14 7 psi DTC No Diagnostic Trouble Code Detecting Condition Trouble Area BARO Open or short in BARO sensor circuit for Sensor 0 5 sec or more EG 550 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine control Module Turbo Pressure Sensor INSPECTION PROCEDURE HINT DTC 35 indicates trouble in the BARO sensor circuit or turbo pressure sensor circuit Because all func tions of the BARO sensor circuit are built into the ECM it is not possible to check this circuit However if no problem is found in the turbo pressure sensor circuit
39. age applied to the ter minal VTA of the ECM increases in the proportion to the opening angle of the throttle valve and becomes approximately 3 2 4 9 V when the throttle valve is ful ly opened The ECM judges the vehicle driving condi tions from these signals input from the terminals VTA and IDL and uses them as one of the conditions for de ciding the air fuel ratio correction power increase corrections and fuel cut control etc The sub throttle position sensor is built and operates in the same way as the main throttle position sensor This sensor is used for traction control The sub throttle valve is opened and closed by the sub throttle actuator ac cording to signals from the TRAC ECU to control the engine output Diagnostic Trobule Code Detecting Condition Open or short in throttle position sensor circuit for 0 5 sec or more Open or short in sub throttle position sensor circuit for 0 5 sec or more HINT 2JZ GTE ENGINE TROUBLESHOOTING DTC 41 47 Throttle Position Sensor s Circuit Engine Control Module av Throttle Position Sensor Open or short in throttle position sensor circuit Throttle position sensor e ECM Open or short in sub throttle position sensor circuit Sub throttle position sensor ECM Diagnostic trouble code 41 is for the throttle position sensor circuit Diagnostic trouble code 47 is for the sub throttle position sensor circuit When the connector for the
40. air or replace harness or connector between ECM and telltale light RH Check operation of No 1 vehicle speed sensor See page BE 46 Repair or replace harness or connector between telltale light RH and No 1 vehicle speed sensor Replace No 1 vehicle speed sensor EG 559 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 43 Starter Signal Circuit CIRCUIT DESCRIPTION When the engine is being cranked the intake air flow is slow so fuel vaporization is poor A rich mixture is there fore necessary in order to achieve good startability While the engine is being cranked the battery positive volt age is applied to terminal STA of the ECM The starter signal is mainly used to increase the fuel injection volume for the starting injection control and after start injection control DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Open or short in starter signal circuit Open or short in ignition switch or starter relay circuit ECM No starter signal to ECM WIRING DIAGRAM Engine Control Module Thett Deterrent and Door Lock Control ECU EG 560 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT This diagnostic chart is based on the premise that the engine is being cranked under normal conditions If the engine does not crank proceed to the matrix chart of problem symptoms on page EG 514 E Setting the test mode 1 Turn ignition switch OFF 2 Connect terminals TE2 a
41. ality in the system DIAGNOSTIC TROUBLE CODE CHECK 1 Turn ignition switch ON 2 Using SST connect terminals between TE1 and E1 of data link connector 1 or 2 SST 09843 18020 3 Read the diagnostic trouble code from malfunction indicator lamp HINT If a diagnostic trouble code is not output check the TE1 terminal circuit See page EG 598 As an example the blinking patterns for codes normal 12 and 31 are as shown on the illustration 4 Check the details of the malfunction using the diagnostic trouble code table on page EG 494 5 After completing the check disconnect terminals TE1 and E1 and turn off the display HINT In the event of 2 or more malfunction codes indication will begin from the smaller numbered code and continue in order to the larger EG 492 PITA ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Diagnosis Inspection Test Mode Compared to the normal mode the test mode has an in creased sensing ability to detect malfunctions It can also detect malfunctions in the starter signal circuit the IDL contact signal of the throttle position sensor air condi tioning signal and park neutral position switch signal Furthermore the same diagnostic items which are detected in the normal mode can also be detected in the test mode DIAGNOSTIC TROUBLE CODE CHECK 1 Initial conditions a Battery voltage 11 V or more b Throttle valve fully closed c Transmission in neutral positio
42. arness Otherwise the female terminal may be wid ened which can result in faulty connection 5 Connect SST check harness A between the ECM and connector of the vehicle wire harness SST 09990 01000 HINT The arrangement of the check connector terminals are the same as those of the ECM See page 511 6 Disconnect the SST SST 09990 01000 7 Reconnect the connector to the ECM a Match the male connector correctly with the female connector then press them together b Tighten the bolt Make sure the connector is completely connected by tighten ing the bolt until there is a clearance of less than 1 mm 0 04 in between the bottom of the male connector and the end of the female connector 8 Install the ECM protector and floor carpet EG 511 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING STANDARD VALUE OF ECM TERMINALS ECM Terminals A33 E1 BBS IGSW A1 B aT 18691 IG switch ON VCC 1841 E2 B65 4 8 IG switch ON IG switch ON and apply vacuum to the IDL1 B64 E2 BBS i throttle opener Throttle valve fully closed IG switch ON Throttle valve fully open 30 h ON hrottle valve fully 10124863 E2 BES G switch Sub throttle rottle valve ully closed 9 14 IG switch ON Sub throttle valve fully open 03 0 8 IG Switch ON VTAT BA3 _ 865 6 Main sub throttle valve fully closed VTA2 B43 212 43 IG switch ON Main or sub throttle va
43. ation pressure 119 1 2 kgf cm 17 3 psi or less EG 548 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 2 Check operation of VSV for waste gate valve 1 Remove VSV 2 Disconnect VSV connector Check operation of VSV for waste gate valve when battery positive voltage is applied and released to the VSV terminals BI Battery positivie voltage is applied Air from port E is flowing out through port F Battery positive voltage is applied Closed air passage from E to F Check voltage terminals PMC of engine control module connector and body ground 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON Measure voltage between terminals PMC of engine control module and ground Voltage 9 14 V Check and repair harness and connector be tween VSV for waste gate valve and engine control module Check and replace enginie control module EG 549 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 35 Turbo Pressure Sensor Circuit Barometric Pressure BARO Sensor Circuit CIRCUIT DESCRIPTION HINT DTC 35 is used to indicate malfunctions in the turbo pressure sensor circuit or BARO sensor circuit 1 TURBO PRESSURE SENSOR This sensor detects the air intake chamber pressure and converts the pressure reading into a voltage which is used to control the turbo pressure by the ECM If the ECM detects the below diagnosis conditions it operates the fail s
44. ator pedal and cable ECM 3 This indicates items for which 2 trip detection logic is used With this logic when a logic malfunction is first detected the malfunction is temporarily stored in the ECM memory If the same case is detected again during the second drive test this second detection causes the Malfunction Indicator Lamp to light up The 2 trip repeats the same mode a 2nd time However the IG switch must be turned OFF between the 1st trip and 2nd trip In the Test Mode the Malfunction Indicator Lamp lights up the 1st trip a malfunction is detected Malfunction detection 1st time Malfunction detection 2nd time temporarily recorded MIL lights up Driving pattern Driving pattern iG Sw IGSW 16 IG SW ON OFF ON OFF i 1 EG 504 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING FAIL SAFE CHART If any of the following codes is detected the ECM enters fail safe mode 6 IGF signals detected in 6 consecutive Fuel cut MS ignitions Torque control prohibited Returned to normal condition THW is fixed at 80 C 176 F Returned to normal condition THA is fixed at 20 C 68 F Returned to normal condition Volume of air flowing is measured by turbo pressure Sensor to determine injection volume and ignition Returned to normal condition Timing Turbo Pressure Fuel cut Returned to normal condition 35 Sensor BARO Atmospheric pressure is fixed at T 101 3 kPa 760 mmHg 29 92 in Hg Returned to normal cond
45. between 0 35 V and 0 70 V for 90 sec under conditions Main Heated cu 2 trip dectection logic Oxygen Sensor a Engine coolant temp Between 80 C 176 F and Signal 95 C 203 F i b Engine speed 1 500 rpm or more c Load driving Example A T in Overdrive 5th for M T A C ON Flat road 80 km h 50 mph d Main heated oxygen sensor signal voltage Alternating above and below 0 45 V Engine Coolant Open or short in engine coolant temp sensor circuit for 0 5 Temp Sensor Sec or more Circuit Intake Air m TE Temp Sensor pen or short in intake air temp sensor circuit for 0 5 sec Signal dibus 1 Main heated oxygen sensor voltage is 0 45 or less lean for 90 sec under conditions a and b 2 trip dectection logic 3 a Engine speed 1 500 rpm or more b Engine coolant temp 70 C or more Air Fuel zs JULIUUUUL patio Lean Malfunction 2 Engine speed varies by more than 20 rom over the preced ing crank angle period during a period of 20 sec or more under conditions a and b 2 trip dectection logic 4 a Engine speed Below 950 rpm D Engine coolant temp 80 C 176 F or more 9 See page EG 503 EG 497 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Malfunction Indicator Trouble Area See page Open or short in heater circuit of main heated oxygen sensor Main heated oxygen sensor heater ECM Main heated oxygen sensor circuit Main heated oxygen
46. ck voltage between terminals VF1 and E1 of data link connector 1 Warm up engine to normal operating t mpera ture 2 Connect terminals TE1 and E1 of data link connector 1 3 Connect positive probe to terminal VF1 and negative probe to terminal E1 of data link connector 1 1 warm up the oxygen sensor by racing engine at 2 500 rpm for about 2 minutes 2 Then still maintaining engine at 2 500 rpm count how many times voltmeter fluctuates need between 0 and 5 V Needle fluctuates B times or mara for avery ten seconds Continue at W Continue at 5 y Go to step 7 Check voltage between terminals OX1 and E1 data link connector 1 Warm up engine to normal operating temperature C Measure voltage between terminals OX1 and E1 of data link connector 1 when engine is suddenly raced to full throttle The voltage should be 0 5 V or higher at least once Inspection should not take linger than 1 second ve Go to step 7 EG 538 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check for open and short in harness and connector between engine control module and main heated oxygen sensor engine control module and data link connector 1 See page IN 30 Repair or replace harness or connector 4 Check each item found to be a possible cause of problem mm circuit found to be a possible cause of trouble according to the results of the check in B 21 The numbers int he table b
47. d less than 3 000 rpm Fault in communications between the engine CPU and A T CPU in the ECM EG 495 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING If a malfunction code is displayed during the diagnostic trouble code check in test mode check the circuit for that code listed in the table below Proceed to the page given for that circuit Malfunction Indicator 1 Trouble Area Lamp Memory 2 See page Normal Test Mode Mode Open or short in crankshaft position sensor camshaft position sensor No 1 No 2 circuit Crankshaft position sensor Camshaft position sensor No 1 No 2 Starter ECM EG 515 Mechanical system malfunction skipping teeth of timing belt belt stretched Camshaft position sensor No 1 No 2 ECM Open or short in IGF circuit from igniter to ECM Igniter ECM EG 519 EG 524 Open short in crankshaft position sensor circuit Crankshaft position sensor ON ECM Open or short in crankshaft position sensor circuit Mechanical system malfunction skipping teeth of timing belt belt stretched A iming be elt stretched 518 Crankshaft position sensor ECM Bg 1 2 See page EG 502 EG 496 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Number of E is TE MIL Blinks Circuit Diagnostic Trouble Code Detecting Condition 1 Open or short in heater circuit of main heated oxygen sensor Fr for 0 5 sec or more 2 Main heated oxygen sensor Fr signal voltage is reduced to
48. e EG 502 EG 500 Number of MIL Blinks ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Circuit Throttle Position Sensor Signal No 1 Vehicle Speed Sensor Signal for A T No 1 Vehicle Speed Sensor Signal for M T Starter Signal Sub Throttle Position Sensor Signal Knock Sensor Signal front side Knock Control Signal Knock Sensor Signal rear side Diagnostic Trouble Code Detecting Condition Open or short in throttle position sensor circuit for 0 5 sec or more All conditions below are detected continuously for 8 sec or more a No 1 vehicle speed signal 0 km h mph b Engine speed 3 000 or more c Park neutral position switch OFF d Stop light switch OFF All conditions below are detected continuously for 8 sec or more a No 1 vehicle speed signal 0 km h mph b Engine speed Between 1 500 rpm and 4 000 rpm c Engine coolant temp 80 C 176 F or more d Load driving No starter signal to ECM Open or short in sub throttle position sensor circuit for 0 5 sec or more No No 1 knock sensor signal to ECM for 4 crank revolutions with engine speed between 2 050 rpm and 5 950 rpm Engine control computer for knock control malfunction at engine speed between 650 rpm and 5 200 rpm No No 2 knock sensor signal to ECM for 4 crank revolutions with engine speed between 2 050 rpm and 5 950 rpm EG 501 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Malfunction Indicator Tr
49. elow show the order in which the checks should be done Main i ad signal Possible Cause Faulty sensor installation Air leakage EG 261 Misfire 116 21 Fuel system EG 568 Injector circuit EG 583 Characteristics deviation EG 530 in engine coolant temp sensor Characteristics deviation Un in intake air temp sensor EG 532 Characteristics deviation in mass a B air flow meter EG 544 ues EGGS Does malfunction disappear when a good main heated oxygen sensor is installed YES Replace main heated oxygen sensor Check and replace engine control module EG 539 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check each item found to be a possible cause of problem Check each circuit found to be a possible cause of trouble according to the results of the check in The numbers int he table below show the order in which the checks should be done Main heater oxygen sensor signal Main heater oxygen sensor continues at 5 0 V signal is normal Possible Causa 7 Injector circuit p Misfire Characteristics deviation in mass air flow meter Characteristics deviation in engine coolant temp sensor Characteristics deviation in intake air temp sensor Repair or replace Check compression See page EG 9 Repair replace Does malfunction disappear when a good main heated oxygen sensor is installed Repair main heated oxygen sensor Check
50. en or short in No 1 vehicle speed sensor All conditions below are detected circuit Continuously for 8 sec or more e ECM a No 1 vehicle speed signal 0 km h mph b Engine speed Between 1 500 rpm and 4 000 rpm c Engine coolant temp 80 C 176 F or more d Load driving HINT In test mode diagnostic trouble code 42 is output when vehicle speed is 5 km h 3 mph or below Reference Waveform between terminals SP1 and E1 when vehicle speed is approx 20 km h 12mph HINT As the vehicle speed increases the number of signals from SP1 increases EG 557 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM GAUGE Fuse Engine Control Module No 1 Vehicle Speed Sensor Talltale Light RH EG 558 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE Check voltage between terminal SP1 of engine control module connector 1 and body ground EM 1 Shift the shift lever to N position 2 Jack up one of the rear wheels 3 Connect SST check harness A See page 510 4 Disconnect power steering ECU connector and cruise control ECU connector 5 Turn ignition switch ON Measure voltage between terminal SP1 of engine control module connector and body ground when the wheel is turned slowly Voltage is generated intermittently Check and replace engine control module Check operation of odometer and trip meter telltale light RH See page Be 48 Rep
51. eplace engine control module and Check and replace engine control module engine control module Repair or replace harness or connector EG 598 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING TE1 TE2 Terminal Circuit CIRCUIT DESCRIPTION Terminal TE1 is located in data link connectors 1 and 2 Terminal TE2 is located ONLY in data link connector 2 The data link connector 1 is located in the engine compartment and the data link connector 2 is located in the cabin When these terminals are connected with the E1 terminal diagnostic trouble codes in normal mode or test mode can be read from the malfunction indicator lamp on the telltale light RH WIRING DIAGRAM Engine Control Moduba Data Link Connector 1 Data Link Connector 2 Figg a EG 599 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT If terminals TE1 and TE2 are connected with terminal E1 diagnostic trouble code is not output or test mode is not activated Even though terminal TE1 is not connected with terminal E1 the malfunction indicator lamp blinks For the above phenomenon the likely cause is an open or short in the wire harness or malfunction inside the ECM Check voltage between terminals TE1 TE2 and E1 of data link connectors 1 and 2 ON i a Turn ignition switch ON ig m 1 For DLC1 measure voltage between terminal TE1 and E1 2 For DLC2 measure voltage between terminals TE1 TE2 and E1 Voltage 9
52. essure Regulator Engine Control Module WSV for Fuel Pressure Control EG 596 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE a d Check VSV for fuel pressure control DE UU UO EN 1 Remove VSV 2 Disconnect VSV connector 1 Measure resistance between terminals 2 Measure resistance between each terminal and the body fala 1 Resistance 33 39 at 20 C 68 F 2 Resistance 1 higher Check operation of VSV when battery positive volt age is applied and released to the VSV terminals GIJ Battery positive voltage is applied Air from port E is flowing out through the air fil ter Battery positive voltage is not applied Air from port E is flowing out through port G MG Replace VSV for fuel pressure control EG 597 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check voltage between terminal FPU of engine control module connector and body ground ru TEL 1 Connect SST check harness See page EG 510 SST 09990 01000 2 Turn ignition switch ON Measure voltage between terminal FPU of engine control module connector and body ground Voltage 9 14 V Proceed to next circuit inspection shown on matrix chart See page Eg 514 A Check for open and short in harness and connector between engine control E module and VSV VSV and EFI main relay See page IN 30 Mat Check and r
53. ever if malfunction of the oxygen sensor causes an output of abnormal electromotive force the ECM is unable to perform accurate air fuel ratio control The main heated oxygen sensor include a heater which heats the Zirconia element The heater is con trolled by the ECM When the intake air volume is low the temperature of the exhaust has is low current flows to the heater to heat the sensor for accurate oxygen concentration detection Atmosphere Ideal Air Fuel Mixture Platinum Electrode Lj B rm Electrolyte i Zirconia Element Platinum Electrode Heater Output Voltage Coating Ceramic Richer Air Fuel Ratia Leaner Trouble Area Open or short in heater circuit of main heated 1 Open or short in heater circuit of main heated Oxygen sensor oxygen sensor for 0 5 sec or more Main heated oxygen sensor heater ECM 2 Main heated oxygen sensor signal voltage is reduced to be 0 35 V and 0 70V for 60 sec under condition a d 2 trip detection logic a Engine temp Between 80 C 176 F and 95 C 203 F Main heated oxygen sensor circuit b Engine speed 1 500 rpm or more Main heated oxygen sensor c Load driving Exam le A T in overdrive 5th for M T A C ON Flat road 80 km h 50 mph d Main heated oxygen sensor signal voltage Alternating above and below 0 45V See page EG 503 EG 526 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING C
54. f the driving pattern a To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded b To check that the malfunction is corrected when the repair is completed by confirming that diagnos tic trouble code is no longer detected EG 565 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING CIRCUIT DESCRIPTION Cont d Malfunction Open in EGR Gas Temp Sensor Circuit Vehicle Speed Detection 88 988 km h 55 60 mph 4 Idling sae 2 IG SW OFF m m 1 Disconnect the EFI No 1 fuse 30A for 10 sec or more with IG switch OFF Initiate test mode Connect terminal TE2 and E1 of data link connector 2 with IG switch OFF 2 Start the engine and warm up 3 Idle the engine for 3 min 4 With the A C ON and transmission in 5th position A T in 3rd speed drive at 88 96 km h 55 60 mph for 4 min or less _ HINT Ifa malfunction exists the malfunction indicator lamp will light up during step 4 NOTICE If the conditions in this test are not strictly followed detection of the malfunction will not be possible WIRING DIAGRAM Engine Control Module 2 B R e GR VSV for EGR R B No 2 Main Hakay GR EGH Gas Temp Sensor FIRS OE EG 566 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Warm up engine to
55. gas controlled according to the driving condi tions back into the intake air fuel mixture It helps to slow down combustion in the cylinder and thus lower the combustion temperature which in turn reduces the amount of NO emission The amount of EGR is regulated by the EGR vacuum modulator according to the engine load If even one of the following conditions is fulfilled r the VSV is turned ON by a signal from the ECM Valea This resists in atmospheric air acting on the EGR valve closing the EGR valve and shutting off the exhaust gas EGR cut OFF Engine coolant temp below 50 C 122 F EGA During deceleration throttle valve closed Light engine load amount of intake air very small Engine speed over 4 800 rpm Manifold absolute pressure more than 120 kPa a 1 2 kgf cm 17 4 psi DTC No Diagnostic Trouble Code Detecting Condition Trouble Area EGR gas temp and intake air temp are 60 C 140 F or less for A T 55 C 131 F or less for M T for 1 4 min under conditions a Open EGR gas temp sensor circuit and b Short in VSV circuit for EGR EGR hose disconnected valve stuck Clogged EGR gas passage 2 trip detection logic a Engine coolant temp 60 C 140 F or more ECM b EGR operation possible Example A T in 3rd speed 5th for M T A C ON 96 km h 60 mph Flat road See page EG 503 DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose o
56. given below T tlo st nolo O co Xi d K se 9 81918 xim TINO See page Gl el Ll ks bles bleh SONT S D151 5 15 09 0 0 0 0 0 0 0 0 Ec jbo Z LL Od oy od TUO Fee t g 3 51151 5 els o uspect area s o Is o Q g 0151 10 5 8 xX O 3 512156 0 EI eoi oll 519 gt 2 5 al ie 82 amp E xl Sic 5 5121 19 210 g als 5101 5 re 2m oux Eo 05 01 100 5 zl JES 1518 212515156 518185 18 SI els jElglElSIlaizi8 3 8 9S S g o 9 s 515 1215215151028 025 ils glS Sis 51515 Symptom 11512121818 8 90 5 2 2818258 Masse 28 85 5855 S SE 1 815 ci22zzlsSolsz ois e SEE 515 515 S e E 505 dale SEE gt 0 lt 5 0 alana Sr Engine does not crank 2 1 3 8 T o No initial combustion ot l L L gs Le C No complete combustion Engine cranks normally 1 o Sd 3 E Cold engine Patt B Hot engine if 8 4 Incorrect first idle 1 Pi dat ty td High engine idle speed Low engine idle speed 3 Rough idling 3 5 na co E Hesitation Poor acceleration E 2 1 al 5 F Muffler explosion after fire EB 1 a Surging 1 CR
57. h is turned OFF EG 583 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Injector Circuit CIRCUIT DESCRIPTION The injectors are located in the intake manifold They inject fuel into the cylinders based on the signals from the engine control module INSPECTION USING OSCILLOSCOPE With engine idling measure waveform between terminals 10 60 and E01 of engine control module HINT The correct waveform is as shown Injector Signal Waveform Magnification 10 V Div f 10 GND SR RE ERE 100 msec Division Idling 1 msec Division Idling Injection duratian WIRING DIAGRAM Engine Cantral Module Ignition Switch WA a EG 584 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE Check voltage between terminals 10 60 of engine control module and ti 1 body ground 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON 80 Measure voltage between terminals 10 60 of en gine control module and body ground Id Voltage 9 14V I Remove AM2 fuse from No 2 AM2 Fuse Check continuity of AM2 fuse F B No 0 2 EB Continuity Check for short in the harness and all the components connected to AM2 fuse ENGINE EG 585 2JZ GTE ENGINE TROUBLESHOOTING Check resistance between terminals 1 and 2 4 6 8 of solenoid resistor connector Disconnect solenoid resistor connector Measu
58. hort in the harness and all the compo nents connected to IGN fuse See Electrical Wir ing Diagram 1 Remove finish lower panel and finish lower panel LH 2 Remove heater to register duct No 2 EN Check continuity between terminals I continuity E Switch position GEOG D Lock PUREE ACC See oto 9194 A eset NG Replace ignition switch heck and repair harness and connector between battery and ignition switch ignition switch and en gine control module EG 579 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Turn ignition switch ON Measure voltage between terminal M REL of en gine control module connector and body ground Voltage 9 14 V Ed Remove EFI No 1 fuse from R B No 2 Check continuity of EFI No 1 fuse 89 Continuity EFI Na 1 ro R B ha 2 Check for short in the harness and all the compo nents connected to EFI No 1 fuse See Electrical Wiring Diagram EG 580 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check EFI main relay Remove EFI main relay from R B No 2 Check continuity between terminals of EFI main relay shown below Terminals 3 and 5 Continuity Reference value 72 2 Terminals 1 and 2 ES 1 Apply battery positive voltage between termi nals 1 and 2 2 Check continuity between terminals 3 and 5 Terminals 3 and 6 Continuity Na Replace EFI main relay Check for
59. hown on page EG 530 If the ECM detects the diagnostic trouble code 24 it operates the fail safe function in which the intake air tem perature is assumed to be 20 C 68 F DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Open or short in intake air temp sensor Open or short in intake air temp sensor circuit Circuit for 0 5 sec or more ntake air temp sensor ECM WIRING DIAGRAM Engine Control Module Intake Air Temo Sensor inside the Mass Air Flaw Meter PRES EG 533 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT If diagnostic trouble codes 22 engine coolant temperature sensor circuit 24 intake air temperature sensor circuit and 41 throttle position sensor circuit are output simultaneously E2 sensor ground may be open Check voltage between terminals THA and E2 of engine control module connector 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON Measure voltage between terminals THW and E2 of engine control module connector Intake temp ae 19 Voltage 20 68 BO 1401 Disconnect the mass air flow meter connector Measure resistance between terminals 3 and 4 of mass air flow meter connector Resistance is within Acceptable Zone on chart Acceptable Intake Bir terris ag FFI amp 14 04 7 SP 5 BE 1
60. ide circuit If diagnostic trouble code 53 is displayed replace engine control module 4 Check continuity between terminals KNK1 KNK2 of engine control module M connector and body ground 1 Connect SST check harness See page EG 510 SST 09990 01000 2 Disconnect the engine control module con nectors Measure resistance between terminals KNK1 KNK2 of engine control module connector and body ground Resistance 1M or higher Go to step I E EG 563 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check knock sensor Disconnect knock sensor connector Measure resistance between the knock sensor terminal and body Resistance 1 higher Check for open and short in harness and connector between engine control module and knock sensor See page IN 30 Repair or replace harness connector With the engine racing 4 000 rpm measure waveform between terminals KNK1 KNK2 of engine cotrol module and body ground HINT The correct waveform is as shown Spread the time on the horizontal axis and con firm that the period of the wave is 123 Qsec Normal mode vibration frequency of knock sensor 8 1 KHz HINT If normal mode vibration frequency is not 8 1 KHz the sensor is malfunctioning EG 564 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 71 EGR System Malfunction CIRCUIT DESCRIPTION The EGR system is designed to recirculate the exhaust
61. ine speed To There are 125 possible positions to which the valve linderHead EES gang be opened Valve Shaft INSPECTION USING OSCILLOSCOPE AIC Switch OFF ON With the engine idling measure wave forms CAL between terminals ISC1 ISC2 ISC3 ISC4 and E01 of engine control module when A C switch ON or OFF HINT The correct waveforms are as shown 10 msac Division Switch ON WAC Valve closel aN 20 ViDiv 10 maec Division EG 587 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine Control Module IAC Valve EG 588 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE 1 Check IAC valve Disconnect IAC valve connector Measure resistance between terminals shown be low OK 5 B1 4 151 100 300 Remove IAC Valve 1 Connect the battery positive lead to terminals 5 B1 and 2 B2 and the negative lead to ter minals 4 S1 1 S2 6 S3 3 S4 in that or der 2 Connect the battery positive lead to terminals 5 B1 and 2 B2 and the negative lead to ter minals 3 84 6 S3 1 S2 4 S1 in that or der 1 The valve moves in the closing direction 2 The valve moves in the opening direction P11333 P11328 Replace IAC valve Check for open and short in harness and connector between EFI main relay and IAC valve IAC valve and engine control module See page 1 30 Repair or
62. ion logic 3 a Engine coolant temp 80 C 176 F or more b Engine speed 1 5000 rpm or more c Accel pedal Fully depressed for 2 sec or more Open or short in mass air flow meter circuit for 3 sec or more with engine speed less than 3 000 rpm All conditions below are detected continuously for 2 sec or more Mainfold absolute pressure 200 kPa 2 0 kgf cm 29 psi or more b Thottle valve opening angle 20 or more i c Engine speed 2 4000 rpm or Open or short in turbo pressure sensor circuit for 0 5 sec or more Open or short in BARO sensor circuit for 0 5 sec or more EG 499 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Malfunction Indicator Trouble Area See page Normal Test Mode Mode Open or short in injector circuit Fuel line pressure injector leak blockage Mechanical system malfunction skipping teeth of timing belt ON ON Ignition system Compression pressure foreign object caught in valve Mass air flow meter air intake ECM Open or short in heater circuit of sub heated oxygen sensor Sub heated oxygen sensor ON N A ECM Open or short in sub heated oxygen sensor circuit Sub heated oxygen sensor ECM ON ON Open or short in mass air flow meter circuit Mass air flow meter ON N A ECM Actuator for waste gate valve Short in VSV for waste gate valve circuit ON N A ECM Open or short in turbo pressure sensor circuit Turbo pressure sensor ON ON ECM 1 2 See pag
63. ition The following must each be repeated at T least 2 times consecutively 41 VTA1 is fixed at closed throttle position e 0 1 V x VTA1 x 0 95 V IDL ON i l 2 VTA is fixed at wide open throttle ou LU 47 Position times consecutively e 0 1 V x VTA2 x 0 95 V Max timing retardation IG switch OFF Max timing retardation Returned to normal condition Max timing retardation IG switch OFF Back Up Function If there is trouble with the program in the ECM and the ignition signals IGT are not output from the microcomput er the ECM controls fuel injection and ignition timing at predetermined levels as a back up function to make it possible to continue to operate the vehicle Furthermore the injection duration is calculated from the starting signal STA and the throttle position signal IDL Also the ignition timing is fixed at the initial ignition timing 10 BTDC without relation to the engine speed HINT If the engine is controlled by the back up function the malfunction indicator lamp lights up to warn the driver of the malfunction but the diagnostic trouble code is not output Circuit G NE signal circuit No 2 Engine coolant temp sensor circuit Intake air temp sensor circuit Throttle position sensor circuit Sub throttle position sensor circuit EG 505 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING CHECK FOR INTERMITTENT PROBLEMS As described in the preceding paragraph abnormality detection
64. l con nection position as this will cause a malfunc tion Proceed to page EG 264 and continue to troubleshoot 1 Remove ignition coil See page IG 26 2 Remove spark plug 3 Install the spark plug to the ignition coil and connect the ignition coil connector 4 Ground the spark plug Check if spark occurs while engine is being cranked To prevent excess fuel being injected from the injectors during this test don t crank the engine for more than 1 2 seconds at a time Proceed to page IG 21 and continue to trou bleshoot OoOo Proceed to matrix chart of problem symptoms on page EG 514 EG 509 2JZ GTE ENGINE TROUBLESHOOTING ENGINE PARTS LOCATION Buoy qng Josupg uonmog LON MSUaS 1jgUSUUE josugc oqang Josue uDIisog 104 ASA Z ON 108uaG msueg paese qna yumg uonisog ANANE a v SAVE A GBR Poe 9 AISEA ASA a BAJBA Ser A anegux3 ASA Z 10128uuo7 ur Josuac ejaujeA L ON yan Kr 1 Nu z PM a athe Ry I 102095 1uEJG07 dung ang dwaj any ayeyu J8 8 A A O 4 SSE uon ssedAg 15neux3 204 ASA 14817 eee F Josuag
65. line DI fuel pump ECU with engine speed 1 000 rpm or less 2 trip dectection logic 1 sec or more after engine starts with closed throttle posi _ tion switch OFF IDL1 2 Park neutral position switch OFF Shift position in R D 2 or L position 3 A C switch ON Switch Condition Signal 1 ON displayed in the diagnostic mode column indicates that the Malfunction Indicator Lamp is lit up when a malfunction is defected OFF indicates that the CHECK does not light up during malfunction diag nosis even if a malfunction is detected N A indicates that the item is not included in malfunction diag nosis 2 O in the memory column indicates that a diagnostic trouble code is recorded in the ECM memory when a malfunction occurs X indicates that a diagnostic trouble code is not recorded in the ECM memory even if a malfunction occurs Accordingly output of diagnostic results in normal or test mode is done with the IG switch ON EG 503 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Malfunction Indicator 1 Trouble Area Lamp Memory 2 See page Normal Test Mode Mode Open in EGR gas temp sensor circuit Short in VSV circuit for EGR EGR hose disconnected valve stuck Clogged EGR gas passage ECM Open or short in fuel pump ECU circuit Fuel pump ECU Fuel pump ECM power source circuit ECM A C switch circuit Throttle position sensor IDL circuit Park neutral position switch circuit Acceler
66. lve fully open Idling Intake air temp 0 C 32 F to 80 C 176 F ow Idling Engine coolant temp 60 C 140 F to meme ewes RE STA B77 E1 B69 6 0 or more Cranking 10 B20 20 B19 9 14 IG switch ON 30 B18 40 817 E01 BBO Pulse generation m 50 B16 60 B15 See page EG 583 ing IGT1 18571 IGT2 B66 9 14 IG switch ON IGT3 185651 IGT4 B54 E1 1869 Pulse generation IGT5 B53 IGTB 852 See page EG 521 Idling 4 5 5 6 IG switch ON IGF B58 E1 B69 Pulse generation vt See page EG 521 9 THA B45 EZ 18651 0 5 3 4 G1 1826 GT C3 Be Pulse generation G2 B25 G2 C IBS lon ating B27 NE C3 87 See page EG 517 M REL A24 B69 9 14 IG switch ON 7 i swich ON 221 E1 B69 Pulse generation _ 14 5 5 5 21 869 7 0 or more Idling EVAP 874 EO1 B80 IG switch ON Idling EG 512 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING VG B66 E21 B28 ISC1 B35 ISC2 B34 Pulse generation ISC3 B33 ISC4 B32 E01 B80 Idling when A C switch ON or OFF Maintain engin 2 rpm for 2 VFA E4009 minutes Me d s diu Idling Pulse generation Maintain engine speed at 2 500 rpm for 2 See page EG 529 minutes after warming up Below 3 0 Idling 14 IG switch ON Pulse generation See page EG 563 OX1 B48 OX2 B47 E1 B69 HT1 B71 HT2 B72
67. n d Air conditioning switched OFF Turn ignition switch OFF Using SST connect terminals TE2 and E1 of the data link connector 2 SST 09843 18020 Turn ignition switch ON HINT To confirm that the test mode is operating check that the malfunction indicator lamp flashes when the ignition switch is turned to ON e fthe malfunction indicator lamp does not flash proceed to troubleshooting of the TE2 terminal circuit on page EG 598 Start the engine Simulate the conditions of the malfunction described by the customer After the road test using SST connect terminals TE1 and E1 of the data link connector 2 SST 09843 18020 Read the diagnostic trouble code on malfunction indicator lamp on the telltale light RH See page EG 491 After completing the check disconnect terminals TE1 TE2 and E1 and turn off the display HINT e test mode will not start if terminals TE2 and E1 are connected after the ignition switch is turned ON e When the engine is not cranked diagnostic trouble codes 43 Starter signal output but this is not abnormal e When the automatic transmission shift lever is in the D 2 L or R shift position or when the air conditioning is on or when the accelerator pedal is depressed code 51 Switch condition signal is output but this is not abnormal n E Nd i ir Interface Vehicle TOYOTA break out box EG 493 ENGINE 2JZ GTE ENGINE T
68. nd E1 of DLC2 3 Turn ignition switch ON Don t start the engine 4 Connect terminal TE1 and E1 of DLC2 Check if code 43 is output by the malfunction indi cator lamp Code 43 is output Start the engine Check if code 43 disappears Code 43 is not output matrix chart See page Eg 514 T Check for open in harness and connector between engine control module L0 and starter relay See page IN 30 Na Repair or replace harness or connector Check and replace engine control module EG 561 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 52 53 55 Knock Sensor Circuit CIRCUIT DESCRIPTION Knock sensors are fitted one each to the front and rear of the left side of the cylinder block to detect engine knocking This sensor contains a piezoelectric element which generates a voltage when it be comes deformed which occurs when the cylinder block vibrates due to knocking If engine knocking occurs ignition timing is retarding to suppress it DTC No Diagnostic Trouble Code Detecting Condition Trouble Area No No 1 knock sensor signal to ECM for 4 Open or short in No 1 knock sensor circuit crank revolutions with engine speed between No 1 knock sensor Looseness 2 050 rpm and 5 950 rpm ECM Engine control computer for knock control malfunction at engine speed between 650 rpm and 5 200 rpm No No 2 knock sensor signal to ECM for 4 Open or short No 2 knock sensor circuit crank revoluti
69. njector circuit Fuel line pressure injector leak blockage Mechanical system malfunction skipping teeth of timing belt Ignition system Compression pressure foreign object caught in valve Mass air flow meter air intake ECM Open and short in injector circuit Fuel line pressure injector leak blockage Mechanical system malfunction skipping teeth of timing belt Ignition system Compression pressure foreign object caught in valve Mass air flow meter air intake ECM EG 535 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING CIRCUIT DESCRIPTION Cont d DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern a To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded b To check that the malfunction is corrected when the repair is completed confirming that diagnostic trouble code is no longer detected Malfunction Open or Short in Main Heated Oxygen Sensor rpm 4 000 rpm Detection ldiing IG SW OFF i SO sec Time Figi HINT Before this test check the feedback voltage for oxygen sensor 1 Disconnect the EFI No 1 fuse 30A for 10 sec or more with IG switch OFF Initiate test mode Connect terminal TE2 and E1 of data link connector 2 with IG switch OFF 2 Start the engine and warm up 3 Idle the engine for 3 min 4 Race the engine quickly to 4 000 rpm 3 times using the accelerator pedal 5 Race the engine at
70. ntrol module sends a Hi signal battery positive voltage to the fuel pump ECU FPC terminal The fuel pump ECU then outputs Hi voltage battery positive voltage to the fuel pump so that the fuel pump operates at high speed After the engine starts during idling or light loads the engine control module outputs a Low signal about 9 V to the fuel pump ECU the fuel pump ECU outputs Low battery voltage about 9 V to the fuel pump and causes the fuel pump to operate at low speed If the intake air volume increases high engine load the engine control module sends a Hi signal to the fuel pump ECU and causes the fuel pump to operate at high speed DTC No Diagnostic Trouble Code Detecting Condition Trouble Area 1 Open or short in fuel pump circuit for 1 sec Or more with engine speed 1 000 rpm or less 2 trip detection logic Open or short in fuel pump ECU circuit Fuel pump ECU Engine control module power source circuit Fuel pump Engine control module 2 Open in input circuit of fuel pump ECU FPC with engine speed 1 000 rpm or less 2 trip detection logic 3 Open or short in diagnostic signal line DI of fuel pump ECU with engine speed 1 000 rpm or less 2 trip detection logic See page EG 503 WIRING DIAGRAM Engane Control Module EG 569 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE Check fuel pump operation ee 1 Turn ignition switch ON D a o3
71. ody 1 Resistance 22 26 at 20 C 68 F 2 Resistance 1M or higher Check operation of VSV when battery positive volt age is applied and released to the VSV terminals Battery positive voltage is applied Air from port E is flowing out through port F Battery positive voltage is not applied Closed air passage from port E to F I Replace VSV for exhaust bypass valve ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 1 Remove VSV 2 Disconnect VSV connector 1 Measure resistance between terminals 2 Measure resistance between each terminal and the body 1 Resistance 38 44 at 20 C 68 F 2 Resistance 1M higher Check operation of VSV when battery positive volt age is applied and released to the VSV terminals Battery positive voltage is applied Air from port E is flowing out through port F Battery positive voltage is not applied Air from port E is flowing out through the air fil ter Replace VSV for exhaust gas control valve EG 593 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 1 Remove VSV 2 Disconnect VSV connector 1 Measure resistance between terminals 2 Measure resistance between each terminal and the body 1 Resistance 38 5 44 5 at 20 C 68 F 2 Resistance 1 higher Li i Check operation of VSV when battery positive volt Battery age is applied and released to the VSV terminals Battery positive voltage is applied Air from po
72. ons with engine speed between No 2 knock sensor looseness 2 050 rpm and 5 950 rpm ECM If the ECM detects the above diagnosis conditions it operates the fail safe function in which the cor rective retard angle value is set to the maximum value DIAGNOSTIC TROUBLE CODE DETECTION DRIVING PATTERN Purpose of the driving pattern a To simulate diagnostic trouble code detecting condition after diagnostic trouble code is recorded b To check that the malfunction is corrected when the repair is completed by confirming that diagnos tic trouble code is no longer detected Malfunction Open or short in Knock Sensor 5 000 rpm idling IG SW OFF Start the engine and warm up Idle the engine for 3 min With the A C ON race the engine quickly to 5 000 rpm 3 times Rapidly depress the accelerator pedal and suddenly release it HINT If a malfunction exists the malfunction indicator lamp will light up when sudden racing is performed NOTICE If the conditions in this test are not strictly followed detection of the malfunction will not be possible EG 562 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine Control Modula Ma 1 Knack Sensor Frant side No 2 Knock Sensor Rear side INSPECTION PROCEDURE HINT If diagnostic trouble code 52 is displayed check No 1 knock sensor for front side circuit If diagnostic trouble code 55 is displayed check No 2 knock sensor for rear s
73. otor connector Measure voltage between terminals VTA1 2 IDL1 2 and E2 of engine control module connector when the sub throttle valve is opened gradually from the closed condition Terminal VTA1 E2 IDL1 E2 Throttle Valve VTA2 E2 IDL2 E2 j Fully Closed 03 08V 0 3 0V Fully Open 42 4B8v 8 14V E2 IDL1 IDL2 DM The voltage should increase steadily in proportion to the throttle valve opening angle 65 84 63 VTA1 VTA2 BESSE Check for intermittent problems See page 505 EG 555 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 1 Remove throttle body See page EG 291 2 For throttle position sensor apply vacuum to throttle opener See page EG 292 Measure resistance of each terminal as below table when the throttle valve is opened gradually from the closed condition Throttle Valve Fully Fully Terminal Closed Opened 2 VTAT1 0 3 6 3 24 11 2 Throttle 4 1E2 ki IPosition 3 Less than 1 Mi 4 EZ 0 5 k higher For Sub Throttle Position Sensor P T gt ki 3ivTA2 0 3 6 3 2 0 10 8 throttle 1 E2 k ki osition Sensor 2 IDL Less than 1 MIT or 1 EP 0 5 kil higher Resistance between terminals 2 3 VTA1 2 and 4 1 E2 should increase gradually in accordance with the throttle valve opening angle 2 IDL2 P1452 Pine Adjust or replace throttle position sen
74. ouble Area See page Normal Test Mode Mode Open or short in throttle position sensor circuit Throttle position sensor ON ECM FF FF ON N A N A N A No 1 vehicle speed sensor Telltale light RH Open or short in No 1 vehicle speed sensor circuit ECM Open or short sub throttle position sensor circuit Sub throttle position sensor ECM Open or short in No 1 knock sensor circuit No 1 Knock sensor loosensess ECM Open or short in No 2 knock sensor circuit No 2 Knock sensor looseness ECM Open or short in starter signal circuit Open or short in ignition switch or starter relay circuit N A ECM 1 2 See page EG 502 EG 502 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Number of ET uae MIL Blinks Circuit Diagnostic Trouble Code Detecting Condition gas temp and intake air temp are 60 C 140 F or less i A T 55 C 131 F or less for 1 4 min under conditions i a and b 2 trip dectection logic 3 i a Engine coolant temp 60 140 F or more i b EGR operation possible Example A T in 3rd speed 5th for M T A C ON 96 km h 60 mph Flat road EGR System Malfunction 1 Open or short in fuel pump circuit for 1 sec or more with engine speed 1 000 rpm or less 2 trip dectection logic 2 Open in input circuit for 1 sec or more with engine speed 1 000 rpm or less 2 trip dectection logic 3 Fuel Pump Control Signal 3 Open or short in diagnostic signal
75. r Contral Amplifier Switch Starter Lu 3 Throttle Position Sensor BR B Theft Deterrent and Door Lock n Control ECU EG 572 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE t Check output condition of diagnostic trouble code 51 EJ Setting the test mode 1 Turn ignition switch OFF 2 Connect terminals TE2 and E1 of DLC2 3 Turn ignition switch ON For checking terminal IDL disconnect the vacuum hose from the throttle body then ap ply vacuum to the throttle opener See page EG 292 For checking terminal A C start the engine 4 connect terminals TE1 and E1 of DLC2 Hl Check if code 51 is output by the malfunction indi ee cator lamp ee amen pr m Cay FS NS Vy Condition V IPark Neutral Posi IP or N position CHECK ition Switch PNP IR D 2orL position Accelerator pedal 4 Marrmal Throttle Position released Sensor IDL1 Accelerator pedal depressed SW ON SW OFF Before the STA signal is input ST is not ON diag nostic trouble code 43 is also output AA C Switch A C Diagnostic trouble code 42 is output with vehicle speed 5 km h 3 mph or below IDL1 Go to step 2 OK NG PNP Go to page Eg 574 A C Go to step 3 Proceed to next circuit inspection shown on matrix chart See page Eg 514 EG 573 ENGINE 2JZ GTE ENGINE TROUBLE
76. r to TOYOTA hand held tester operator s manual for further details ECM TERMINAL VALUES MEASUREMENT USING TOYOTA BREAK OUT BOX AND TOYOTA HAND HELD TESTER 1 Hook up the TOYOTA break out box and TOYOTA handheld tester to the vehicle 2 Read the ECM input output values by following the prompts on the tester screen HINT TOYOTA hand held tester has a Snapshot function This records the measured values and is effective in the diagnosis of intermittent problems Please refer to TOYOTA hand held tester TOYOTA break out box operator s manual for further details EG 494 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DIAGNOSTIC TROUBLE CODE CHART HINT Parameters listed in the chart may not be exactly the same as your reading due to type of the instruments or other factors Number of PORREN MIL Blinks Circuit Normal G NE Signal No 1 G NE Signal No 2 Ignition Signal 1 A T Control LJ WUE Signal 1 Diagnostic Trouble Code Detecting Condition No code is recorded No NE or G1 and G2 signal to ECM for 2 sec or more after cranking No NE signal to ECM for 0 1 sec or more at 1 000 rpm or more NE signal does not pulse 12 times to ECM during the interval between G1 and G2 pulses Deviation in G G1 G2 and NE signal continues for 3 sec dur ing idling throttle fully closed after engine warmed up No IGF signal to ECM for 4 7 consecutive IGT signals with en gine spee
77. re resistance between terminals 1 and 2 4 6 8 of solenoid resistor connector Resistance Approx 6 at 20 C 68 F Check for open in harness and connector between terminal E01 E02 of ECM connector and body ground See page IN 30 Repair or replace harness connector Check and replace engine control module Disconnect injector connector See page EG 273 Measure resistance of injector Resistance Approx 1 95 at 20 C 68 F Check injection volume of injector See page EG 279 Injection volume 124 cm 15 sec 7 6 8 8 cu in 15 sec Difference between each injector Less than 10 cm 0 6 cu in Leakage Fuel drop One drop or less per minute Replace injector EG 586 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING IAC Valve Circuit CIRCUIT DESCRIPTION The IAC valve is situated on the intake air chamber In take air bypassing the throttle valve is directed to the IAC valve through a passage Throttle Body A step motor is built into the IAC valve It consists of 4 coils a magnetic rotor valve shaft and a valve Intake 22m E When the current flows to the coils due to signals from Air d the ECM the rotor turns and moves the valve shaft for A ward or backward changing the clearance between A A Throttle the valve and the valve seat tow Valve In this way the intake air volume bypassing the throttle Meter Si Coila valve is regulated controlling the eng
78. replace harness connector Proceed to next circuit inspection shown on ma trix chart See page EG 514 EG 589 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Turbo Control Circuit CIRCUIT DESCRIPTION HINT This turbocharger system has 3 control valves Exhaust Bypass Valve Exhaust Gas Control Valve Intake Air control Valve Each valve is controlled by turbo pressure which is controlled by VSV based on signals from ECM EXHAUST BYPASS VALVE This valve controls the opening or closing of the exhaust bypass passage to ensure a smooth transition from 1 turbo operation to 2 turbo operation EXHAUST GAS CONTROL VALVE This valve controls the opening or closing of the No 2 exhaust passage in order to operate No 2 turbocharger INTAKE AIR CONTROL VALVE This valve controls the opening or closing of the No 2 intake air passage in order to pass the charged air from No 2 turbocharger Exhaust Gas Control Valve Exhaust Bypass Valve Actuator Intake Air Control EG 590 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING WIRING DIAGRAM Engine Control Module VSV for Exhaust Bypass Valve VWSV for Exhaust Gas Central Valve VSV for Intake Air Control Valve INSPECTION PROCEDURE EG 591 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING 1 Remove VSV 2 Disconnect VSV connector 1 Measure resistance between terminals 2 Measure resistance between each terminal and the b
79. rol module and each sensor See page IN 30 Inspect sensor installation and teeth of timing rotor Senne see Tighten the sensor Replace timing rotor Intake camshaft crankshaft timing pulley oe SO Check and replace engine control module E EG 518 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 13 G NE Signal Circuit No 2 CIRCUIT DESCRIPTION Refer to G NE signal circuit No 1 page EG 515 DTC No Diagnostic Trouble Code Detecting Condition Trouble Area Open or short in crankshaft position No NE signal to ECM for 0 1 sec or more at sensor circuit 1 000 rpm or more Crankshaft position sensor ECM Open or short in crankshaft position sensor circuit NE signal does not pulse 12 times to ECM Mechanical system malfunction skipping during the interval between G1 and G2 pulses teeth of timing belt belt stretched Crankshaft position sensor ECM Mechanical system malfunction skipping teeth of timing belt belt stretched Camshaft position sensor No 1 No 2 ECM Deviation in G G1 G2 and NE signal Continues for 3 sec during idling throttle fully closed after engine warmed up INSPECTION PROCEDURE any teeth of NE signal plate are broken Check valve timing Check for loose and jumping teeth of timing belt 4 See page EG 33 Check for intermittent problems See page EG 505 EG 519 ENGINE 2JZ GTE ENGINE TROUBLESHOO
80. rol estimated control etc When the park neutral position switch is off code 51 is output in the test mode diagnosis This is not abnor mal WIRING DIAGRAM Engine Control Module J B No 1 J B No 1 Theft Deterrent and Door Lock Cantral ECU EG 575 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE HINT This diagnosis chart is based on the premise that the engine is being cranked under normal conditions If the engine does not crank proceed to the matrix chart of problem symptoms on page EG 514 Check output condition of diagnostic trouble code 51 Connect terminals TE2 and E1 of DLC2 Turn ignition switch ON Crank the engine 1 2 8 4 Connect terminals TE1 and E1 of DLC2 Check if diagnostic trouble code 51 is output when the shift lever is in the P and D shift positions Shift Result Position NG Type NG Type II p Normal Code Code 51 Normal Code ow Code 51 Code 51 Normal Code Check for open in harness and connector between engine control module and park neutral position switch See page IN 30 ok Check and replace engine control module Repair or replace harness or connector Check park neutral position switch See page AT2 101 DENE Check and replace engine control module EG 576 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING ECM Power Source Circuit CIRCUIT DESCRIPTION When the ignition switch is
81. rt E is flowing out through port F Battery positive voltage is not applied Air from port E is flowing out through the air filter NG Replace VSV for intake gas control valve ENGINE 2JZ GTE ENGINE TROUBLESHOOTING Check voltage between terminal VSV1 VSV2 VSV3 of engine control module connector and body ground 1 Connect SST check harness A See page EG 510 2 Turn ignition switch ON Measure voltage between terminal VSV1 VSV2 vsvs3 of engine control module connector and body ground Voltage 9 14 V Check actuator See page EG 144 158 Check for open and short in harness and connector between EFI main replay and engine control module See page IN 30 Check and replace engine control module EG 595 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING VSV Circuit for Fuel Pressure Control CIRCUIT DESCRIPTION The ECM turns on a VSV Vacuum Switching Valve to draw air into the diaphragm chamber of the pressure regulator if it detects that the temperature of the engine coolant is too high ECM during engine starting i The air drawn into the chamber increases the fuel pressure to prevent fuel vapor lock at high n engine temperature in order to help the en Intake Fuel i Manifold gine start when it is warm Fuel pressure control ends approx 120 sec after the engine is started WIRING DIAGRAM Vy Pr
82. sensor Open or short in engine coolant temp sensor circuit Engine coolant temp sensor ECM Open or short in intake air temp sensor circuit Intake air temp sensor ECM Open or short in Main heated oxygen sensor circuit Main heated oxygen sensor Ignition system ECM Onen or short in injector circuit Fuel line pressure injector leak blockage Mechanical system malfunction skipping teeth of timing belt Ignition system Compression pressure foreign object caught in valve Mass air flow meter air intake ECM 1 2 See page EG 502 EG 498 Number of MIL Blinks JUULIL BE32033 Tur 8 See page EG 503 ENGINE Circuit Air Fuel Ratio Rich Malfunction Sub Heated Oxygen Sensor Signal Mass Air Flow Meter Circuit Turbo Pressure Malfunction Turbo Pressure Sensor Circuit Barometric Pressure Sensor Circuit 2JZ GTE ENGINE TROUBLESHOOTING Diagnostic Trouble Code Detecting Condition Engine speed varies by more than 20 rpm over the preceding icrank angle period during a period of 25 sec or more under conditions a and b 2 trip dectection logic 3 a Engine speed Below 950 rpm b Engine coolant temp 80 C 176 F or more 1 Open or short in heater circuit of sub heated oxygen sensor for 0 5 sec or more 2 Main heated oxygen sensor signal is 0 45 V or more and sub heated oxygen sensor signal is 0 45 V or less under conditions a c 2 trip dectect
83. sor s See page EG 292 Check for open and short in harness and connector between engine control module and throttle position sensors s See page IN 30 NG Repair or replace harness or connector i Check and replace engine control module EG 556 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING DTC 42 No 1 Vehicle Speed Sensor Signal Circuit CIRCUIT DESCRIPTION The No 1 vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft which is rotated by the transmission output shaft via the driven gear After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the odometer and trip meter it is then transmitted to the engine control module The ECM determines the vehicle speed based on the frequency of these pulse signals eer an T M DU ES e m Transmission Se Se fe a Output Shaft Y pulse pulse E AIT Lis pase ECM po AG ee esos p 93 iur LC SOME Telltale Light No Vehicle RH Odometer Speed Sensor and Trip Meter FIDELI 20543281 Diagnostic Trouble Code Detecting Condition Trouble Area For A T All conditions below are detected Continuously for 8 sec or more a No 1 vehicle speed signal 0 km h mph b Engine speed 3 000 rpm or more c Park neutral position switch OFF d Stop light switch OFF No 1 vehicle speed sensor Telltale light RH Odometer and trip meter For AT c Op
84. thermistor provide a bridge circuit with the power transis tor controlled so that the potential of A or B remains equal to maintain the set temperature B Power Transistor harmista Platinum Hot Wire Voltage Platinum Hot Thermistor Wire Diagnostic Troubla Coda Detecting Condition Trouble Area Open or short in mass air flow master circuit Mass air flow meter ECM Open or short in mass air flow meter circuit for r 3 sec or more with engine speed less than 3 000 rpm If the ECM detects diagnostic trouble code 31 it operates the fail safe function whereby the turbo pressure sensor is used making it possible to continue to drive the vehicle WIRING DIAGRAM Engine Control Module Mass Air Flaw Meter EG 545 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE Check voltage between terminals VG and E21 of engine control module connector rst 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Start engine Measure voltage between terminals VG and E21 of engine control module connector while engine rpm at idling Voltage 0 7 1 7 V Check and replace engine control module Check voltage between terminal 1 of mass air flow meter connector and body ground 1 Disconnect the mass air flow meter connector 2 Turn ignition switch ON Measure voltage between terminal 1 of mass air flow meter connector and body ground Voltage
85. turned on battery volt age is applied to the terminal IGSW of the ECM and the main relay control circuit in the ECM sends a signal to the terminal M REL of the ECM switch ing on the main relay This signal causes current to flow to the coil closing the contacts of the main relay and supplying power to the terminal B of the ECM If the ignition switch is turned off the ECM contin ues to switch on the main relay for a maximum of 2 seconds for the initial setting of the IAC valve WIRING DIAGRAM EF1 Main Relay R B No 2 Battery PUTAS Engine Control Module lanition Switch Main Relay Cantral Engine Control Module EG 577 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING INSPECTION PROCEDURE Check voltage between terminal B E1 of engine control module connector 1 Connect SST check harness A See page EG 510 SST 09990 01000 2 Turn ignition switch ON Measure voltage between terminal B and E1 of engine control module connector Voltage 9 14 V Check for open in harness and connector between terminal E1 of engine control module and body ground See page IN 30 Turn ignition switch ON Measure voltage between terminal IGSW of en gine control module connector and body ground Voltage 9 14 V EG 578 ENGINE 2JZ GTE ENGINE TROUBLESHOOTING El Remove GN tuse from J B No3 EJ co continuity of IGN fuse Continuity Check for s

2JZ–GTE ENGINE TROUBLESHOOTING

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2JZ&ndash;GTE ENGINE TROUBLESHOOTING

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2JZ–GTE ENGINE TROUBLESHOOTING