2001 NISSAN ALMERA N16 wiring diagram

Diagnostic Procedure ..............................................281
Component Inspection .............................................284
DTC P0400 EGR FUNCTION (CLOSED) (WHERE
FITTED)........................................................................285
Description ...............................................................285
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................286
ECM Terminals and Reference Value .....................286
On Board Diagnosis Logic.......................................286
DTC Confirmation Procedure ..................................287
Wiring Diagram ........................................................289
Diagnostic Procedure ..............................................290
Component Inspection .............................................292
DTC P0403 EGR VOLUME CONTROL VALVE
(CIRCUIT).....................................................................293
Description ...............................................................293
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................294
ECM Terminals and Reference Value .....................294
On Board Diagnosis Logic.......................................294
DTC Confirmation Procedure ..................................294
Wiring Diagram ........................................................296
Diagnostic Procedure ..............................................297
Component Inspection .............................................298
DTC P0420 THREE WAY CATALYST FUNCTION...299
On Board Diagnosis Logic.......................................299
DTC Confirmation Procedure ..................................299
Overall Function Check ...........................................300
Diagnostic Procedure ..............................................300
DTC P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE (CIRCUIT).................304
Description ...............................................................304
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................304
ECM Terminals and Reference Value .....................305
On Board Diagnosis Logic.......................................305
DTC Confirmation Procedure ..................................305
Wiring Diagram ........................................................306
Diagnostic Procedure ..............................................307
Component Inspection .............................................308
DTC P0500 VEHICLE SPEED SENSOR (VSS).........309
Component Description ...........................................309
ECM Terminals and Reference Value .....................309
On Board Diagnosis Logic.......................................309
DTC Confirmation Procedure ..................................309
Wiring Diagram ........................................................ 311
Diagnostic Procedure ..............................................312
DTC P0505 IDLE AIR CONTROL VALVE (IACV) -
AUXILIARY AIR CONTROL (AAC) VALVE...............313
Description ...............................................................313
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................314ECM Terminals and Reference Value .....................314
On Board Diagnosis Logic.......................................314
DTC Confirmation Procedure ..................................314
Wiring Diagram ........................................................315
Diagnostic Procedure ..............................................316
Component Inspection .............................................320
DTC P0510 CLOSED THROTTLE POSITION
SWITCH (WHERE FITTED).........................................321
Component Description ...........................................321
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................321
ECM Terminals and Reference Value .....................321
On Board Diagnosis Logic.......................................321
DTC Confirmation Procedure ..................................321
Overall Function Check ...........................................322
Wiring Diagram ........................................................323
Diagnostic Procedure ..............................................324
Component Inspection .............................................325
DTC P0605 ECM.........................................................327
Component Description ...........................................327
On Board Diagnosis Logic.......................................327
DTC Confirmation Procedure ..................................327
Diagnostic Procedure ..............................................328
D T C P 1111INTAKE VALVE TIMING CONTROL
SOLENOID VALVE......................................................329
Component Description ...........................................329
Operation .................................................................329
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................329
ECM Terminals and Reference Value .....................329
On Board Diagnosis Logic.......................................329
DTC Confirmation Procedure ..................................330
Wiring Diagram ........................................................331
Diagnostic Procedure ..............................................332
Component Inspection .............................................333
DTC P1217 OVERHEAT (COOLING SYSTEM).........334
System Description ..................................................334
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................334
ECM Terminals and Reference Value .....................335
On Board Diagnosis Logic.......................................335
Overall Function Check ...........................................336
Wiring Diagram ........................................................337
Diagnostic Procedure ..............................................339
Main 12 Causes of Overheating..............................345
Component Inspection .............................................345
DTC P1401 EGR TEMPERATURE SENSOR
(WHERE FITTED)........................................................347
Component Description ...........................................347
On Board Diagnosis Logic.......................................347
DTC Confirmation Procedure ..................................347
Wiring Diagram ........................................................350
CONTENTS(Cont'd)
EC-4

Diagnostic Procedure ..............................................351
Component Inspection .............................................352
DTC P1402 EGR FUNCTION (OPEN) (WHERE
FITTED)........................................................................353
Description ...............................................................353
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................354
ECM Terminals and Reference Value .....................354
On Board Diagnosis Logic.......................................354
DTC Confirmation Procedure ..................................355
Wiring Diagram ........................................................357
Diagnostic Procedure ..............................................358
Component Inspection .............................................359
DTC P1605 A/T DIAGNOSIS COMMUNICATION
LINE.............................................................................361
System Description ..................................................361
ECM Terminals and Reference Value .....................361
On Board Diagnosis Logic.......................................361
DTC Confirmation Procedure ..................................361
Wiring Diagram ........................................................362
Diagnostic Procedure ..............................................363
DTC P1706 PARK/NEUTRAL POSITION (PNP)
SWITCH.......................................................................364
Component Description ...........................................364
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................364
ECM Terminals and Reference Value .....................364
On Board Diagnosis Logic.......................................364
DTC Confirmation Procedure ..................................364
Overall Function Check ...........................................365
Wiring Diagram ........................................................366
Diagnostic Procedure ..............................................367
INTAKE AIR TEMPERATURE SENSOR....................369
Component Description ...........................................369
Wiring Diagram ........................................................370
Diagnostic Procedure ..............................................371
Component Inspection .............................................372
HEATED OXYGEN SENSOR 1 (FRONT)...................373
Component Description ...........................................373
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................373
ECM Terminals and Reference Value .....................373
Wiring Diagram ........................................................374
Diagnostic Procedure ..............................................375
Component Inspection .............................................377
HEATED OXYGEN SENSOR 1 HEATER (FRONT)...379
Description ...............................................................379
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................379
ECM Terminals and Reference Value .....................379
Wiring Diagram ........................................................380
Diagnostic Procedure ..............................................381Component Inspection .............................................382
HEATED OXYGEN SENSOR 2 (REAR).....................383
Component Description ...........................................383
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................383
ECM Terminals and Reference Value .....................383
Wiring Diagram ........................................................384
Diagnostic Procedure ..............................................385
Component Inspection .............................................387
HEATED OXYGEN SENSOR 2 HEATER (REAR).....389
Description ...............................................................389
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................389
ECM Terminals and Reference Value .....................389
Wiring Diagram ........................................................390
Diagnostic Procedure ..............................................391
Component Inspection .............................................393
CRANKSHAFT POSITION SENSOR (POS)...............394
Component Description ...........................................394
ECM Terminals and Reference Value .....................394
Wiring Diagram ........................................................395
Diagnostic Procedure ..............................................396
Component Inspection .............................................399
EGR VOLUME CONTROL SYSTEM (WHERE
FITTED)........................................................................400
Description ...............................................................400
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................401
ECM Terminals and Reference Value .....................402
Wiring Diagram ........................................................403
Diagnostic Procedure ..............................................404
Component Inspection .............................................409
EVAP CANISTER PURGE VOLUME CONTROL
SOLENOID VALVE...................................................... 411
Description ............................................................... 411
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................ 411
ECM Terminals and Reference Value .....................412
Wiring Diagram ........................................................413
Diagnostic Procedure ..............................................414
Component Inspection .............................................417
IDLE AIR CONTROL VALVE (IACV) - AUXILIARY
AIR CONTROL............................................................418
Description ...............................................................418
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................419
ECM Terminals and Reference Value .....................419
Wiring Diagram ........................................................420
Diagnostic Procedure ..............................................421
Component Inspection .............................................425
CONTENTS(Cont'd)
EC-5

CLOSED THROTTLE POSITION SWITCH
(WHERE FITTED)........................................................426
Component Description ...........................................426
ECM Terminals and Reference Value .....................426
Wiring Diagram ........................................................427
Diagnostic Procedure ..............................................428
Component Inspection .............................................431
INTAKE VALVE TIMING CONTROL SOLENOID
VALVE..........................................................................432
Component Description ...........................................432
Operation .................................................................432
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................432
ECM Terminals and Reference Value .....................432
Wiring Diagram ........................................................433
Diagnostic Procedure ..............................................434
Component Inspection .............................................436
A/T COMMUNICATION LINE......................................437
System Description ..................................................437
Wiring Diagram ........................................................438
Diagnostic Procedure ..............................................439
PARK/NEUTRAL POSITION (PNP) SWITCH............441
Component Description ...........................................441
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................441
ECM Terminals and Reference Value .....................441
Wiring Diagram ........................................................442
Diagnostic Procedure ..............................................443
INJECTOR...................................................................446
Component Description ...........................................446
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................446
ECM Terminals and Reference Value .....................446
Wiring Diagram ........................................................447
Diagnostic Procedure ..............................................448
Component Inspection .............................................450
IGNITION SIGNAL.......................................................451
Component Description ...........................................451
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................451
ECM Terminals and Reference Value .....................451
Wiring Diagram ........................................................452
Diagnostic Procedure ..............................................454
Component Inspection .............................................458
START SIGNAL...........................................................460
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................460
ECM Terminals and Reference Value .....................460
Wiring Diagram ........................................................461
Diagnostic Procedure ..............................................462
FUEL PUMP.................................................................464
System Description ..................................................464Component Description ...........................................464
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................464
ECM Terminals and Reference Value .....................465
Wiring Diagram ........................................................466
Diagnostic Procedure ..............................................467
Component Inspection .............................................469
POWER STEERING OIL PRESSURE SWITCH.........470
Component Description ...........................................470
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................470
ECM Terminals and Reference Value .....................470
Wiring Diagram ........................................................471
Diagnostic Procedure ..............................................472
Component Inspection .............................................473
REFRIGERANT PRESSURE SENSOR......................475
Description ...............................................................475
ECM Terminals and Reference Value .....................475
Wiring Diagram ........................................................476
Diagnostic Procedure ..............................................477
ELECTRICAL LOAD SIGNAL.....................................480
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................480
ECM Terminals and Reference Value .....................480
Wiring Diagram ........................................................481
Diagnostic Procedure - Load Signal - .....................483
Diagnostic Procedure - Heater Control Panel
(Fan Switch) - ..........................................................487
MI & DATA LINK CONNECTORS..............................488
Wiring Diagram ........................................................488
SERVICE DATA AND SPECIFICATIONS (SDS).......489
Fuel Pressure Regulator..........................................489
Idle Speed and Ignition Timing ................................489
Mass Air Flow Sensor..............................................489
Intake Air Temperature Sensor ................................489
Engine Coolant Temperature Sensor ......................489
Throttle Position Sensor ..........................................489
Heated Oxygen Sensor 1 Heater (Front) ................489
Heated Oxygen Sensor 2 Heater (Rear).................489
EGR Volume Control Valve (Where Fitted) .............490
EGR Temperature Sensor (Where Fitted) ...............490
EVAP Canister Purge Volume Control Valve ..........490
IACV-AAC Valve ......................................................490
Injector .....................................................................490
Ignition Coil with Power Transistor ..........................490
Condenser ...............................................................490
Fuel Pump ...............................................................490
Crankshaft Position Sensor (POS) ..........................491
Camshaft Position Sensor (PHASE) .......................491
CONTENTS(Cont'd)
EC-6

YD
TROUBLE DIAGNOSIS - INDEX................................492
Alphabetical & P No. Index for DTC .......................492
PRECAUTIONS...........................................................494
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...........494
Engine Fuel & Emission Control System ................495
Precautions ..............................................................496
Wiring Diagrams and Trouble Diagnosis .................497
PREPARATION...........................................................498
Special Service Tools ..............................................498
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.......................................................................499
Engine Control Component Parts Location .............499
Circuit Diagram ........................................................502
System Diagram ......................................................503
System Chart ...........................................................504
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION.............................................505
Fuel Injection Control System .................................505
Fuel Injection Timing Control System......................506
Air Conditioning Cut Control ....................................507
Fuel Cut Control (at no load & high engine
speed) ......................................................................507
Crankcase Ventilation System .................................508
BASIC SERVICE PROCEDURE.................................509
Injection Tube and Injection Nozzle ........................509
Electronic Control Fuel Injection Pump ...................513
Fuel Filter .................................................................520
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION.............................................................522
DTC and MI Detection Logic ...................................522
Diagnostic Trouble Code (DTC) ..............................522
Malfunction Indicator (MI) ........................................523
CONSULT-II .............................................................527
TROUBLE DIAGNOSIS - INTRODUCTION................532
Introduction ..............................................................532
Work Flow ................................................................534
TROUBLE DIAGNOSIS - BASIC INSPECTION.........536
Basic Inspection.......................................................536
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION.............................................................541
Symptom Matrix Chart .............................................541
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................551
Major Sensor Reference Graph in Data Monitor
Mode ........................................................................553
ECM Terminals and Reference Value .....................554
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.....................................................................559
Description ...............................................................559
Diagnostic Procedure ..............................................559TROUBLE DIAGNOSIS FOR POWER SUPPLY........560
Main Power Supply and Ground Circuit ..................560
DTC P0100 MASS AIR FLOW SEN...........................566
Component Description ...........................................566
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................566
ECM Terminals and Reference Value .....................566
On Board Diagnosis Logic.......................................566
DTC Confirmation Procedure ..................................566
Wiring Diagram ........................................................568
Diagnostic Procedure ..............................................569
DTC P0115 COOLANT TEMP SEN............................572
Description ...............................................................572
On Board Diagnosis Logic.......................................572
DTC Confirmation Procedure ..................................572
Wiring Diagram ........................................................574
Diagnostic Procedure ..............................................575
DTC P0120 ACCEL POS SENSOR............................577
Description ...............................................................577
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................577
ECM Terminals and Reference Value .....................577
On Board Diagnosis Logic.......................................578
DTC Confirmation Procedure ..................................578
Wiring Diagram ........................................................579
Diagnostic Procedure ..............................................580
DTC P0335 CRANK POS SEN (TDC)........................587
Description ...............................................................587
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................587
ECM Terminals and Reference Value .....................587
On Board Diagnosis Logic.......................................587
DTC Confirmation Procedure ..................................588
Wiring Diagram ........................................................589
Diagnostic Procedure ..............................................590
DTC P0500 VEHICLE SPEED SEN............................593
Description ...............................................................593
ECM Terminals and Reference Value .....................593
On Board Diagnosis Logic.......................................593
Overall Function Check ...........................................593
Wiring Diagram ........................................................595
Diagnostic Procedure ..............................................596
DTC P0571 BRAKE SW..............................................597
Description ...............................................................597
ECM Terminals and Reference Value .....................597
On Board Diagnosis Logic.......................................597
DTC Confirmation Procedure ..................................597
Wiring Diagram ........................................................599
Diagnostic Procedure ..............................................600
DTC P1107 ECM 10....................................................604
Description ...............................................................604
On Board Diagnosis Logic.......................................604
CONTENTS(Cont'd)
EC-7

DTC Confirmation Procedure ..................................604
Diagnostic Procedure ..............................................605
DTC P1180 P9.FUEL TEMP SEN...............................606
Description ...............................................................606
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................606
ECM Terminals and Reference Value .....................607
On Board Diagnosis Logic.......................................607
DTC Confirmation Procedure ..................................607
Wiring Diagram ........................................................609
Diagnostic Procedure ..............................................610
DTC P1202 FUEL CUT SYSTEM2.............................612
Description ...............................................................612
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................612
ECM Terminals and Reference Value .....................613
On Board Diagnosis Logic.......................................613
DTC Confirmation Procedure ..................................613
Wiring Diagram ........................................................615
Diagnostic Procedure ..............................................616
DTC P1217 OVER HEAT............................................618
Description ...............................................................618
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................618
ECM Terminals and Reference Value .....................618
On Board Diagnosis Logic.......................................619
Overall Function Check ...........................................620
Wiring Diagram ........................................................621
Diagnostic Procedure ..............................................622
Main 12 Causes of Overheating..............................633
DTC P1241 P7.F/INJ TIMG FB...................................634
Description ...............................................................634
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................634
ECM Terminals and Reference Value .....................635
On Board Diagnosis Logic.......................................635
DTC Confirmation Procedure ..................................635
Wiring Diagram ........................................................637
Diagnostic Procedure ..............................................638
DTC P1251 P4.SPILL/V CIRC....................................640
Description ...............................................................640
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................640
ECM Terminals and Reference Value .....................641
On Board Diagnosis Logic.......................................641
DTC Confirmation Procedure ..................................641
Wiring Diagram ........................................................643
Diagnostic Procedure ..............................................644
DTC P1337 P2.DTC PULSE SIG................................646
Description ...............................................................646
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................646ECM Terminals and Reference Value .....................647
On Board Diagnosis Logic.......................................647
DTC Confirmation Procedure ..................................647
Wiring Diagram ........................................................649
Diagnostic Procedure ..............................................650
DTC P1341 P1.CAM POS SEN..................................652
Description ...............................................................652
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................652
ECM Terminals and Reference Value .....................653
On Board Diagnosis Logic.......................................653
DTC Confirmation Procedure ..................................653
Wiring Diagram ........................................................655
Diagnostic Procedure ..............................................656
DTC P1600 P3.PUMP COMM LINE............................658
Description ...............................................................658
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................658
ECM Terminals and Reference Value .....................659
On Board Diagnosis Logic.......................................659
DTC Confirmation Procedure ..................................659
Wiring Diagram ........................................................661
Diagnostic Procedure ..............................................662
DTC P1603 ECM 12, DTC P1607 ECM 2...................664
Description ...............................................................664
On Board Diagnosis Logic.......................................664
DTC Confirmation Procedure ..................................664
Diagnostic Procedure ..............................................665
DTC P1620 ECM RLY.................................................666
ECM Terminals and Reference Value .....................666
On Board Diagnosis Logic.......................................666
DTC Confirmation Procedure ..................................666
Wiring Diagram ........................................................667
Diagnostic Procedure ..............................................668
DTC P1621 ECM 15....................................................670
Description ...............................................................670
On Board Diagnosis Logic.......................................670
DTC Confirmation Procedure ..................................670
Diagnostic Procedure ..............................................671
DTC P1660 BATTERY VOLTAGE..............................672
On Board Diagnosis Logic.......................................672
DTC Confirmation Procedure ..................................672
Diagnostic Procedure ..............................................672
DTC P1690 P5.PUMP C/MODULE.............................674
Description ...............................................................674
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................674
ECM Terminals and Reference Value .....................675
On Board Diagnosis Logic.......................................675
DTC Confirmation Procedure ..................................675
Diagnostic Procedure ..............................................676
CONTENTS(Cont'd)
EC-8

GLOW CONTROL SYSTEM.......................................677
Description ...............................................................677
ECM Terminals and Reference Value .....................678
Wiring Diagram ........................................................679
Diagnostic Procedure ..............................................680
EGR VOLUME CONTROL SYSTEM..........................686
Description ...............................................................686
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................687
ECM Terminals and Reference Value .....................687
Wiring Diagram ........................................................688
Diagnostic Procedure ..............................................689
START SIGNAL...........................................................693
Wiring Diagram ........................................................693
Diagnostic Procedure ..............................................694
PARK/NEUTRAL POSITION (PNP) SWITCH
(WHERE FITTED)........................................................696
Description ...............................................................696CONSULT-II Reference Value in Data Monitor
Mode ........................................................................696
ECM Terminals and Reference Value .....................696
Wiring Diagram ........................................................697
Diagnostic Procedure ..............................................698
AIR CONDITIONER CONTROL..................................700
Wiring Diagram ........................................................700
MI & DATA LINK CONNECTORS..............................701
Wiring Diagram ........................................................701
SERVICE DATA AND SPECIFICATIONS (SDS).......702
General Specifications .............................................702
Injection Nozzle .......................................................702
Engine Coolant Temperature Sensor ......................702
Crankshaft Position Sensor (TDC) ..........................702
Glow Plug ................................................................702
Accelerator Position Sensor ....................................702
EGR Volume Control Valve .....................................702
CONTENTS(Cont'd)
EC-9

SEF605X
+Do not operate fuel pump when there is no fuel in lines.
+Tighten fuel hose clamps to the specified torque.
SEF709Y
+Do not depress accelerator pedal when starting.
+Immediately after starting, do not rev up engine unneces-
sarily.
+Do not rev up engine just prior to shutdown.
SEF708Y
+When installing C.B. ham radio or a mobile phone, be sure
to observe the following as it may adversely affect elec-
tronic control systems depending on installation location.
1)Keep the antenna as far as possible from the electronic
control units.
2)Keep the antenna feeder line more than 20 cm (8 in) away
from the harness of electronic controls.
Do not let them run parallel for a long distance.
3)Adjust the antenna and feeder line so that the standing-
wave ratio can be kept smaller.
4)Be sure to ground the radio to vehicle body.
Wiring Diagrams and Trouble DiagnosisNJEC0006When you read Wiring diagrams, refer to the following:
+GI-12, ªHOW TO READ WIRING DIAGRAMSº
+EL-10, ªPOWER SUPPLY ROUTINGº for power distribution
circuit
When you perform trouble diagnosis, refer to the following:
+GI-31, ªHOW TO FOLLOW TEST GROUP IN TROUBLE
DIAGNOSISº
+GI-21, ªHOW TO PERFORM EFFICIENT DIAGNOSIS FOR
AN ELECTRICAL INCIDENTº
PRECAUTIONSQG
Engine Fuel & Emission Control System (Cont'd)
EC-19

21 CHECK HEATED OXYGEN SENSOR 1 (FRONT) SIGNAL
With CONSULT-II
1. Stop engine.
2. Replace heated oxygen sensor 1 (front).
3. Start engine and warm it up to normal operating temperature.
4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.
5. See ªHO2S1 MNTR (B1)º in ªDATA MONITORº mode.
6. Running engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the
monitor fluctuates between ªLEANº and ªRICHº more than 5 times during 10 seconds.
1 time: RICH®LEAN®RICH
2 times: RICH®LEAN®RICH®LEAN®RICH
Without CONSULT-II
1. Stop engine.
2. Replace heated oxygen sensor 1 (front).
3. Start engine and warm it up to normal operating temperature.
4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.
5. Set voltmeter probe between ECM terminal 62 and ground.
6. Make sure that the voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more than 5 times during 10 seconds at 2,000
rpm.
1 time: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V
2 times: 0 - 0.3V®0.6 - 1.0V®0 - 0.3V®0.6 - 1.0V®0 - 0.3V
OK or NG
OK©INSPECTION END
NG©GO TO 22.
22 DETECT MALFUNCTIONING PART
Check the following.
1. Check fuel pressure regulator. Refer to EC-39.
2. Check mass air flow sensor and its circuit. Refer to EC-152.
3. Check injector and its circuit. Refer to EC-446.
Clean or replace if necessary.
4. Check engine coolant temperature sensor and its circuit. Refer to EC-163.
5. Check ECM function by substituting another known-good ECM.
(ECM may be the cause of a problem, but this is rarely the case.)
©GO TO 3.
23 CHECK HEATED OXYGEN SENSOR 1 (FRONT) HARNESS
1. Turn off engine and disconnect battery ground cable.
2. Disconnect ECM harness connector.
3. Disconnect heated oxygen sensor 1 (front) harness connector.
4. Check harness continuity between ECM terminal 62 and heated oxygen sensor 1 (front) harness connector terminal 1.
Refer to Wiring Diagram, EC-176.
Continuity should exist.
OK or NG
OK©GO TO 25.
NG©GO TO 24.
24 REPAIR OR REPLACE
Repair or replace harness between ECM and heated oxygen sensor 1 (front).
©GO TO 3.
BASIC SERVICE PROCEDUREQG
Inspection Procedure (Cont'd)
EC-51