sensor NISSAN TEANA 2008 Service Manual

EC-3
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P DTC Logic .............................................................
170
Diagnosis Procedure .............................................171
P0133, P0153 A/F SENSOR 1 .........................173
Description ............................................................173
DTC Logic .............................................................173
Diagnosis Procedure .............................................175
P0137, P0157 HO2S2 ......................................178
Description ............................................................178
DTC Logic .............................................................178
Component Function Check ..................................179
Diagnosis Procedure .............................................180
Component Inspection ..........................................182
P0138, P0158 HO2S2 ......................................184
Description ............................................................184
DTC Logic .............................................................184
Component Function Check ..................................186
Diagnosis Procedure .............................................187
Component Inspection ..........................................190
P0139, P0159 HO2S2 ......................................192
Description ............................................................192
DTC Logic .............................................................192
Component Function Check ..................................193
Diagnosis Procedure .............................................194
Component Inspection ..........................................195
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .......................................................
198
DTC Logic .............................................................198
Diagnosis Procedure .............................................199
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .......................................................
202
DTC Logic .............................................................202
Diagnosis Procedure .............................................203
P0222, P0223 TP SENSOR .............................206
Description ............................................................206
DTC Logic .............................................................206
Diagnosis Procedure .............................................206
Component Inspection ..........................................207
Special Repair Requirement .................................208
P0300, P0301, P0302, P0303, P0304, P0305,
P0306 MISFIRE ................................................
209
DTC Logic .............................................................209
Diagnosis Procedure .............................................210
P0327, P0328, P0332, P0333 KS ....................215
Description ............................................................215
DTC Logic .............................................................215
Diagnosis Procedure .............................................215
Component Inspection ..........................................216
P0335 CKP SENSOR (POS) ............................218
Description ............................................................218
DTC Logic .............................................................218
Diagnosis Procedure .............................................219
Component Inspection ...........................................221
P0340, P0345 CMP SENSOR (PHASE) .........222
Description .............................................................222
DTC Logic ..............................................................222
Diagnosis Procedure .............................................223
Component Inspection ...........................................224
P0420, P0430 THREE WAY CATALYST
FUNCTION ......................................................
226
DTC Logic ..............................................................226
Component Function Check ..................................227
Diagnosis Procedure .............................................228
P0444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ......................
231
Description .............................................................231
DTC Logic ..............................................................231
Diagnosis Procedure .............................................231
Component Inspection ...........................................232
P0500 VSS ......................................................234
Description .............................................................234
DTC Logic ..............................................................234
Component Function Check ..................................235
Diagnosis Procedure .............................................235
P0550 PSP SENSOR ......................................236
Description .............................................................236
DTC Logic ..............................................................236
Diagnosis Procedure .............................................236
Component Inspection ...........................................237
P0603 ECM POWER SUPPLY .......................238
Description .............................................................238
DTC Logic ..............................................................238
Diagnosis Procedure .............................................238
P0605 ECM .....................................................240
Description .............................................................240
DTC Logic ..............................................................240
Diagnosis Procedure .............................................241
P0607 ECM .....................................................242
Description .............................................................242
DTC Logic ..............................................................242
Diagnosis Procedure .............................................242
P0643 SENSOR POWER SUPPLY ................243
DTC Logic ..............................................................243
Diagnosis Procedure .............................................243
P0850 PNP SWITCH .......................................245
Description .............................................................245
DTC Logic ..............................................................245
Component Function Check ..................................246
Diagnosis Procedure (VQ35DE engine) ................246
Diagnosis Procedure (VQ25DE engine) ................247
P1212 TCS COMMUNICATION LINE .............249
Description .............................................................249

EC-4
DTC Logic ..............................................................249
Diagnosis Procedure .............................................249
P1217 ENGINE OVER TEMPERATURE .........250
DTC Logic ..............................................................250
Component Function Check ..................................250
Diagnosis Procedure .............................................251
P1225 TP SENSOR .........................................254
Description .............................................................254
DTC Logic ..............................................................254
Diagnosis Procedure .............................................254
Special Repair Requirement ..................................255
P1226 TP SENSOR .........................................256
Description .............................................................256
DTC Logic ..............................................................256
Diagnosis Procedure .............................................256
Special Repair Requirement ..................................257
P1550 BATTERY CURRENT SENSOR ..........258
Description .............................................................258
DTC Logic ..............................................................258
Diagnosis Procedure .............................................258
Component Inspection ...........................................259
P1551, P1552 BATTERY CURRENT SEN-
SOR ..................................................................
261
Description .............................................................261
DTC Logic ..............................................................261
Diagnosis Procedure .............................................261
Component Inspection ...........................................262
P1553 BATTERY CURRENT SENSOR ..........264
Description .............................................................264
DTC Logic ..............................................................264
Diagnosis Procedure .............................................264
Component Inspection ...........................................265
P1554 BATTERY CURRENT SENSOR ..........267
Description .............................................................267
DTC Logic ..............................................................267
Component Function Check ..................................267
Diagnosis Procedure .............................................268
Component Inspection ...........................................269
P1564 ASCD STEERING SWITCH .................270
Description .............................................................270
DTC Logic ..............................................................270
Diagnosis Procedure .............................................270
Component Inspection ...........................................272
P1572 ASCD BRAKE SWITCH .......................273
Description .............................................................273
DTC Logic ..............................................................273
Diagnosis Procedure .............................................274
Component Inspection (ASCD Brake Switch) .......277
Component Inspection (Stop Lamp Switch) ..........277
P1574 ASCD VEHICLE SPEED SENSOR ......278
Description .............................................................278
DTC Logic .............................................................278
Diagnosis Procedure .............................................278
P1700 CVT CONTROL SYSTEM .....................280
Description ............................................................280
P1715 INPUT SPEED SENSOR (PRIMARY
SPEED SENSOR) .............................................
281
Description ............................................................281
DTC Logic .............................................................281
Diagnosis Procedure .............................................281
P1720 VSS ........................................................283
Description ............................................................283
DTC Logic .............................................................283
Diagnosis Procedure .............................................283
P1800 VIAS CONTROL SOLENOID VALVE 1 ..285
Description ............................................................285
DTC Logic .............................................................285
Diagnosis Procedure .............................................285
Component Inspection ..........................................286
P1801 VIAS CONTROL SOLENOID VALVE 2 ..288
Description ............................................................288
DTC Logic .............................................................288
Diagnosis Procedure .............................................288
Component Inspection ..........................................289
P1805 BRAKE SWITCH ...................................291
Description ............................................................291
DTC Logic .............................................................291
Diagnosis Procedure .............................................291
Component Inspection (Stop Lamp Switch) ..........292
P2100, P2103 THROTTLE CONTROL MO-
TOR RELAY .....................................................
294
Description ............................................................294
DTC Logic .............................................................294
Diagnosis Procedure .............................................294
P2101 ELECTRIC THROTTLE CONTROL
FUNCTION ........................................................
296
Description ............................................................296
DTC Logic .............................................................296
Diagnosis Procedure .............................................296
Component Inspection ..........................................298
Special Repair Requirement .................................299
P2118 THROTTLE CONTROL MOTOR ..........300
Description ............................................................300
DTC Logic .............................................................300
Component Inspection ..........................................300
Special Repair Requirement .................................300
P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR ......................................................
302
Description ............................................................302
DTC Logic .............................................................302
Diagnosis Procedure .............................................303
Special Repair Requirement .................................303

EC-5
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P2122, P2123 APP SENSOR ...........................304
Description ............................................................304
DTC Logic .............................................................304
Diagnosis Procedure .............................................304
Component Inspection ..........................................306
Special Repair Requirement .................................306
P2127, P2128 APP SENSOR ...........................307
Description ............................................................307
DTC Logic .............................................................307
Diagnosis Procedure .............................................307
Component Inspection ..........................................309
Special Repair Requirement .................................310
P2135 TP SENSOR ..........................................311
Description ............................................................311
DTC Logic .............................................................311
Diagnosis Procedure .............................................311
Component Inspection ..........................................313
Special Repair Requirement .................................313
P2138 APP SENSOR .......................................314
Description ............................................................314
DTC Logic .............................................................314
Diagnosis Procedure .............................................314
Component Inspection ..........................................316
Special Repair Requirement .................................317
P2A00, P2A03 A/F SENSOR 1 ........................318
Description ............................................................318
DTC Logic .............................................................318
Diagnosis Procedure .............................................319
ASCD BRAKE SWITCH ...................................321
Description ............................................................321
Component Function Check ..................................321
Diagnosis Procedure .............................................321
Component Inspection (ASCD Brake Switch) .......322
ASCD INDICATOR ...........................................323
Description ............................................................323
Component Function Check ..................................323
Diagnosis Procedure .............................................323
COOLING FAN .................................................324
Description ............................................................324
Component Function Check ..................................324
Diagnosis Procedure .............................................324
Component Inspection (Cooling Fan Motor) .........327
Component Inspection (Cooling Fan Relay) .........328
ELECTRICAL LOAD SIGNAL .........................329
Description ............................................................329
Component Function Check ..................................329
Diagnosis Procedure .............................................329
ELECTRONIC CONTROLLED ENGINE
MOUNT .............................................................
331
Description ............................................................331
Component Function Check ..................................331
Diagnosis Procedure .............................................331
Component Inspection ...........................................332
FUEL INJECTOR ............................................334
Description .............................................................334
Component Function Check ..................................334
Diagnosis Procedure .............................................334
Component Inspection ...........................................336
FUEL PUMP ....................................................337
Description .............................................................337
Component Function Check ..................................337
Diagnosis Procedure .............................................337
Component Inspection (Fuel Pump) ......................340
Component Inspection (Condenser) ......................340
IGNITION SIGNAL ..........................................341
Description .............................................................341
Component Function Check ..................................341
Diagnosis Procedure .............................................341
Component Inspection (Ignition Coil with Power
Transistor) .............................................................
344
Component Inspection (Condenser) ......................345
MALFUNCTION INDICATOR .........................346
Description .............................................................346
Component Function Check ..................................346
Diagnosis Procedure .............................................346
POSITIVE CRANKCASE VENTILATION .......347
Description .............................................................347
Component Inspection ...........................................347
REFRIGERANT PRESSURE SENSOR ..........348
Description .............................................................348
Component Function Check ..................................348
Diagnosis Procedure .............................................348
VARIABLE INDUCTION AIR SYSTEM ..........351
Description .............................................................351
Component Function Check (VQ35DE engine) .....351
Component Function Check (VQ25DE engine) .....353
Diagnosis Procedure (VQ35DE engine) ................353
Diagnosis Procedure (VQ25DE engine) ................355
ECU DIAGNOSIS .......................................357
ECM .................................................................357
Reference Value ....................................................357
Wiring Diagram—ENGINE CONTROL SYS-
TEM— ...................................................................
371
Fail safe .................................................................386
DTC Inspection Priority Chart .............................388
DTC Index .............................................................389
How to Set SRT Code ........................................392
Test Value and Test Limit ...................................394
SYMPTOM DIAGNOSIS ............................400
ENGINE CONTROL SYSTEM SYMPTOMS ...400
Symptom Table .....................................................400
NORMAL OPERATING CONDITION .............404

EC-6
Description .............................................................404
PRECAUTION ............................................405
PRECAUTIONS ...............................................405
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ................................................................
405
Precautions For Xenon Headlamp Service ...........405
Precaution for Procedure without Cowl Top Cover ..405
On Board Diagnostic (OBD) System of Engine
and CVT ................................................................
405
General Precautions ..............................................406
PREPARATION ..........................................410
PREPARATION ...............................................410
Special Service Tools ............................................410
Commercial Service Tools .....................................410
ON-VEHICLE MAINTENANCE .................411
FUEL PRESSURE ............................................411
Inspection ..............................................................411
ON-VEHICLE REPAIR ..............................413
EVAPORATIVE EMISSION SYSTEM ..............413
Inspection ..............................................................413
SERVICE DATA AND SPECIFICATIONS
(SDS) .........................................................
414
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
414
Idle Speed .............................................................414
Ignition Timing .......................................................414
Calculated Load Value ..........................................414
Mass Air Flow Sensor ...........................................414

DIAGNOSIS AND REPAIR WORKFLOW
EC-9
< BASIC INSPECTION >[VQ25DE, VQ35DE]
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YES >> GO TO 7.
NO >> GO TO 9.
7.PERFORM “SPEC” OF “DATA MONITOR” MODE
With CONSULT-III
Check that “MAS A/F SE-B1”, “B/FUEL SCHDL”, “A/F ALPHA-B1” and “A/F ALPHA-B2” are within the SP
value using CONSULT-III in “SPEC” of “DATA MONITOR” mode. Refer to EC-124, "
Component Function
Check".
Are they within the SP value?
YES >> GO TO 9.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART BY TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Detect malfunctioning part according to EC-125, "
Diagnosis Procedure".
Is a malfunctioning part detected?
YES >> GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM TABLE
Detect malfunctioning system according to EC-400, "
Symptom Table" based on the confirmed symptom in
step 4, and determine the trouble diagnosis order based on possible causes and symptoms.
>> GO TO 10.
10.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Inspect according to Diagnostic Procedure of the system.
NOTE:
The Diagnostic Procedure in EC section described based on open circuit inspection. A short circuit inspection
is also required for the circuit check in the Diagnostic Procedure. For details, refer to “Circuit Inspection” in GI-
37, "Circuit Inspection".
Is a malfunctioning part detected?
YES >> GO TO 11.
NO >> Monitor input data from related sensors or check voltage of related ECM terminals using CON-
SULT-III. Refer to EC-357, "
Reference Value".
11 .REPAIR OR REPLACE THE MALFUNCTIONING PART
1. Repair or replace the malfunctioning part.
2. Reconnect parts or connectors disconnected during Diagnostic Procedure again after repair and replace-
ment.
3. Check DTC. If DTC is displayed, erase it, refer to EC-102, "
Diagnosis Description".
>> GO TO 12.
12.FINAL CHECK
When DTC was detected in step 2, perform DTC Confirmation Procedure or Overall Function Check again,
and then check that the malfunction have been completely repaired.
When symptom was described from the customer, refer to confirmed symptom in step 3 or 4, and check that
the symptom is not detected.
Is DTC detected and does symptom remain?
YES-1 >> DTC is detected: GO TO 10.
YES-2 >> Symptom remains: GO TO 6.
NO >> Before returning the vehicle to the customer, always erase unnecessary DTC in ECM and TCM
(Transmission Control Module). (Refer to EC-102, "
Diagnosis Description".) If the completion of
SRT is needed, drive vehicle under the specific DRIVING PATTERN in EC-392,
"HowtoSetSRTCode".

EC-12
< BASIC INSPECTION >[VQ25DE, VQ35DE]
INSPECTION AND ADJUSTMENT
2. Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no
load, then run engine at idle speed for about 1 minute.
3. Check idle speed.
For procedure, refer to EC-14, "
IDLE SPEED : Special Repair
Requirement".
For specification, refer to EC-414, "
Idle Speed".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 4.
4.PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-15, "
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
>> GO TO 5.
5.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-16, "
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
>> GO TO 6.
6.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-16, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 7.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
7.CHECK TARGET IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, refer to EC-14, "
IDLE SPEED : Special Repair Requirement".
For specification, refer to EC-414, "
Idle Speed".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the Following.
 Check camshaft position sensor (PHASE) and circuit. Refer to EC-223, "
Diagnosis Procedure".
 Check crankshaft position sensor (POS) and circuit. Refer to EC-219, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 9.
NO >> 1. Repair or replace malfunctioning part.
2. GO TO 4.
9.CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-8, "
ECM RE-COMMUNICATING FUNCTION : Description".
>> GO TO 4.
10.CHECK IGNITION TIMING
1. Run engine at idle.
PBIA8513J

INSPECTION AND ADJUSTMENT
EC-13
< BASIC INSPECTION >[VQ25DE, VQ35DE]
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2. Check ignition timing with a timing light.
For procedure, refer to EC-15, "
IGNITION TIMING : Special Repair Requirement".
For specification, refer to EC-414, "
Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 11.
11 .PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-15, "
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
>> GO TO 12.
12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-16, "
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
>> GO TO 13.
13.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-16, "
IDLE AIR VOLUME LEARNING : Special Repair Requirement".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 14.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
14.CHECK TARGET IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, refer to EC-14, "
IDLE SPEED : Special Repair Requirement".
For specification, refer to EC-414, "
Idle Speed".
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 17.
15.CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light.
For procedure, refer to EC-15, "
IGNITION TIMING : Special Repair Requirement".
For specification, refer to EC-414, "
Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 16.
16.CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-53, "
Removal and Installation".
Is the inspection result normal?
YES >> GO TO 17.
NO >> 1. Repair the timing chain installation.
2. GO TO 4.
17.DETECT MALFUNCTIONING PART
Check the following.
 Check camshaft position sensor (PHASE) and circuit. Refer to EC-223, "
Diagnosis Procedure".
 Check crankshaft position sensor (POS) and circuit. Refer to EC-219, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 18.
NO >> 1. Repair or replace malfunctioning part.

INSPECTION AND ADJUSTMENT
EC-15
< BASIC INSPECTION >[VQ25DE, VQ35DE]
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Check idle speed in “DATA MONITOR” mode with CONSULT-III.
With GST
Check idle speed with Service $01 of GST.
>> INSPECTION END
IGNITION TIMING
IGNITION TIMING : DescriptionINFOID:0000000003856449
This describes how to check the ignition timing. For the actual procedure, follow the instructions in “BASIC
INSPECTION”.
IGNITION TIMING : Special Repair RequirementINFOID:0000000003856450
1.CHECK IGNITION TIMING
1. Attach timing light to loop wires as shown.
2. Check ignition timing.
>> INSPECTION END
ACCELERATOR PEDAL RELEASED POSITION LEARNING
ACCELERATOR PEDAL RELEASED POSITION LEARNING : DescriptionINFOID:0000000003856453
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
the harness connector of the accelerator pedal position sensor or ECM is disconnected.
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Re-
quirement
INFOID:0000000003856454
1.START
1. Check that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
>> END
A : Timing light
: Vehicle front
JMBIA1388ZZ
JMBIA1135GB

EC-16
< BASIC INSPECTION >[VQ25DE, VQ35DE]
INSPECTION AND ADJUSTMENT
THROTTLE VALVE CLOSED POSITION LEARNING
THROTTLE VALVE CLOSED POSITION LEARNING : DescriptionINFOID:0000000003856455
Throttle Valve Closed Position Learning is an operation to learn the fully closed position of the throttle valve by
monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement
INFOID:0000000003856456
1.START
1. Check that accelerator pedal is fully released.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
Check that throttle valve moves during above 10 seconds by confirming the operating sound.
>> END
IDLE AIR VOLUME LEARNING
IDLE AIR VOLUME LEARNING : DescriptionINFOID:0000000003856457
Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within
the specific range. It must be performed under the following conditions:
 Each time electric throttle control actuator or ECM is replaced.
 Idle speed or ignition timing is out of specification.
IDLE AIR VOLUME LEARNING : Special Repair RequirementINFOID:0000000003856458
1.PRECONDITIONING
Before performing Idle Air Volume Learning, check that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
 Battery voltage: More than 12.9 V (At idle)
 Engine coolant temperature: 70 - 100°C (158 - 212°F)
 Selector lever: P or N
 Electric load switch: OFF
(Air conditioner, head lamp, rear window defogger)
-For vehicle equipped with daytime light systems, perform one of the following procedures before
starting engine not to illuminate headlamps.
 Apply parking brake
 Set lighting switch to the 1st position
 Steering wheel: Neutral (Straight-ahead position)
 Vehicle speed: Stopped
 Transmission: Warmed-up
- With CONSULT-III: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “CVT” system indi-
cates less than 0.9 V.
- Without CONSULT-III: Drive vehicle for 10 minutes.
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM IDLE AIR VOLUME LEARNING
With CONSULT-III
1. Perform EC-15, "
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
2. Perform EC-16, "
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
3. Start engine and warm it up to normal operating temperature.
4. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
5. Touch “START” and wait 20 seconds.

INSPECTION AND ADJUSTMENT
EC-17
< BASIC INSPECTION >[VQ25DE, VQ35DE]
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Is “CMPLT” displayed on CONSULT-III screen?
YES >> GO TO 4.
NO >> GO TO 5.
3.PERFORM IDLE AIR VOLUME LEARNING
Without CONSULT-III
NOTE:
It is better to count the time accurately with a clock.
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform EC-15, "
ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Require-
ment".
2. Perform EC-16, "
THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement".
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
6. Repeat the following procedure quickly 5 times within 5 seconds.
- Fully depress the accelerator pedal.
- Fully release the accelerator pedal.
7. Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MI stops blinking and
turns ON.
8. Fully release the accelerator pedal within 3 seconds after the MI turns ON.
9. Start engine and let it idle.
10. Wait 20 seconds.
>> GO TO 4.
4.CHECK IDLE SPEED AND IGNITION TIMING
Rev up the engine 2 or 3 times and check that idle speed and ignition timing are within the specifications.
For procedure, refer to EC-14, "
IDLE SPEED : Special Repair Requirement" and EC-15, "IGNITION TIMING :
Special Repair Requirement".
For specifications, refer to EC-414, "
Idle Speed" and EC-414, "Ignition Timing".
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 5.
5.DETECT MALFUNCTIONING PART-I
Check the following
 Check that throttle valve is fully closed.
 Check PCV valve operation.
 Check that downstream of throttle valve is free from air leakage.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace malfunctioning part.
6.DETECT MALFUNCTIONING PART-II
When the above three items check out OK, engine component parts and their installation condition are ques-
tionable. Check and eliminate the cause of the incident.
It is useful to perform “TROUBLE DIAGNOSIS - SPECIFICATION VALUE”. Refer to EC-124, "
Description".
PBIB0665E