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N16
ENGINE CONTROL SYSTEM
SECTION EC
CONTENTS
QG
DESCRIPTION ...............................................................59
Introduction ................................................................59
Two Trip Detection Logic ...........................................59
NATS (Nissan Anti-theft System) ..............................74
Malfunction Indicator (MI) ..........................................74
Models Only) ..............................................................78
CONSULT-II ...............................................................83
Generic Scan Tool (GST) ..........................................94
TROUBLE DIAGNOSIS - INTRODUCTION ..................96
Introduction ................................................................96
Work Flow ..................................................................98
Basic Inspection/Sedan ...........................................100
Basic Inspection/Hatchback .....................................128
DESCRIPTION .............................................................153
DTC Inspection Priority Chart ..................................153
Fail-safe Chart .........................................................154
Symptom Matrix Chart .............................................155
Mode ........................................................................159
Mode ........................................................................161
ECM Terminals and Reference Value .....................164
Description ...............................................................173
Testing Condition .....................................................173
Inspection Procedure ...............................................173
Diagnostic Procedure ..............................................174
INCIDENT .....................................................................177
Description ...............................................................177
Diagnostic Procedure ..............................................177
Main Power Supply and Ground Circuit ..................178
TROUBLE DIAGNOSIS - INDEX ..................................10
Alphabetical & P No. Index for DTC .........................10
PRECAUTIONS .............................................................16
Supplemental Restraint System (SRS)
²
AIR
BAG
²
and
²
SEAT BELT PRE-TENSIONER
²
.............16
System of Engine and A/T. ........................................16
PREPARATION .............................................................20
Special Service Tools ................................................20
Commercial Service Tools .........................................20
SYSTEM .........................................................................21
Circuit Diagram ..........................................................25
System Diagram ........................................................29
Vacuum Hose Drawing ..............................................30
System Chart .............................................................31
SYSTEM DESCRIPTION ...............................................32
Multiport Fuel Injection (MFI) System .......................32
Electronic Ignition (EI) System ..................................34
Air Conditioning Cut Control ......................................35
speed) ........................................................................36
Evaporative Emission System ...................................36
Positive Crankcase Ventilation ..................................39
BASIC SERVICE PROCEDURE ...................................40
Fuel Pressure Release ..............................................40
Fuel Pressure Check .................................................40
Fuel Pressure Regulator Check ................................41
Injector .......................................................................41
Preparation ................................................................44
Inspection Procedure .................................................47
Idle Air Volume Learning ...........................................57
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CONTENTS (Cont’d)
Component Description ...........................................187
Mode ........................................................................187
ECM Terminals and Reference Value .....................187
On Board Diagnosis Logic. ......................................187
Fail-safe Mode .........................................................188
DTC Confirmation Procedure ..................................188
Wiring Diagram ........................................................189
Diagnostic Procedure ..............................................191
Component Inspection .............................................193
SENSOR ......................................................................194
Component Description ...........................................194
On Board Diagnosis Logic. ......................................195
DTC Confirmation Procedure ..................................195
Wiring Diagram ........................................................196
Diagnostic Procedure ..............................................198
Component Inspection .............................................200
SENSOR ......................................................................201
Component Description ...........................................201
Mode ........................................................................201
On Board Diagnosis Logic. ......................................201
Fail-safe Mode .........................................................202
DTC Confirmation Procedure ..................................202
Wiring Diagram ........................................................203
Diagnostic Procedure ..............................................205
Component Inspection .............................................206
Component Description ...........................................207
Mode ........................................................................207
ECM Terminals and Reference Value .....................208
On Board Diagnosis Logic. ......................................208
Fail-safe Mode .........................................................208
DTC Confirmation Procedure ..................................208
Wiring Diagram ........................................................210
Diagnostic Procedure ..............................................212
Component Inspection .............................................214
(FRONT) (CIRCUIT) .....................................................216
Component Description ...........................................216
Mode ........................................................................216
ECM Terminals and Reference Value .....................216
On Board Diagnosis Logic. ......................................217
DTC Confirmation Procedure ..................................217
Overall Function Check ...........................................218
Wiring Diagram ........................................................219
Diagnostic Procedure ..............................................221
Component Inspection .............................................222
(FRONT) (LEAN SHIFT MONITORING) .....................224
Component Description ...........................................224
Mode ........................................................................224
ECM Terminals and Reference Value .....................224
On Board Diagnosis Logic .......................................225
DTC Confirmation Procedure ..................................225
Overall Function Check ...........................................226
Diagnostic Procedure ..............................................226
Component Inspection .............................................228
(FRONT) (RICH SHIFT MONITORING) ......................230
Component Description ...........................................230
Mode ........................................................................230
ECM Terminals and Reference Value .....................230
On Board Diagnosis Logic .......................................231
DTC Confirmation Procedure ..................................231
Overall Function Check ...........................................232
Diagnostic Procedure ..............................................232
Component Inspection .............................................234
(FRONT) .......................................................................236
Component Description ...........................................236
Mode ........................................................................236
ECM Terminals and Reference Value .....................236
On Board Diagnosis Logic .......................................237
DTC Confirmation Procedure ..................................237
Overall Function Check ...........................................238
Wiring Diagram ........................................................239
Diagnostic Procedure ..............................................241
Component Inspection .............................................243
(FRONT) (HIGH VOLTAGE) ........................................245
Component Description ...........................................245
Mode ........................................................................245
ECM Terminals and Reference Value .....................245
On Board Diagnosis Logic .......................................246
DTC Confirmation Procedure ..................................246
Wiring Diagram ........................................................247
Diagnostic Procedure ..............................................249
Component Inspection .............................................250
(FRONT) HEATER .......................................................252
Description ...............................................................252
Mode ........................................................................252
ECM Terminals and Reference Value .....................252
EC-2
CONTENTS (Cont’d)
On Board Diagnosis Logic. ......................................252
DTC Confirmation Procedure ..................................253
Wiring Diagram ........................................................254
Diagnostic Procedure ..............................................256
Component Inspection .............................................257
(REAR) (MIN. VOLTAGE MONITORING) ...................258
Component Description ...........................................258
Mode ........................................................................258
ECM Terminals and Reference Value .....................258
On Board Diagnosis Logic. ......................................258
DTC Confirmation Procedure ..................................259
Overall Function Check ...........................................260
Wiring Diagram ........................................................261
Diagnostic Procedure ..............................................263
Component Inspection .............................................265
(REAR) (MAX. VOLTAGE MONITORING) .................267
Component Description ...........................................267
Mode ........................................................................267
ECM Terminals and Reference Value .....................267
On Board Diagnosis Logic. ......................................267
DTC Confirmation Procedure ..................................268
Overall Function Check ...........................................269
Wiring Diagram ........................................................270
Diagnostic Procedure ..............................................272
Component Inspection .............................................273
(REAR) .........................................................................275
Component Description ...........................................275
Mode ........................................................................275
ECM Terminals and Reference Value .....................275
On Board Diagnosis Logic. ......................................275
DTC Confirmation Procedure ..................................276
Overall Function Check ...........................................277
Wiring Diagram ........................................................278
Diagnostic Procedure ..............................................280
Component Inspection .............................................282
(REAR) (HIGH VOLTAGE) ..........................................284
Component Description ...........................................284
Mode ........................................................................284
ECM Terminals and Reference Value .....................284
On Board Diagnosis Logic. ......................................284
DTC Confirmation Procedure ..................................285
Overall Function Check ...........................................285
Wiring Diagram ........................................................286
Diagnostic Procedure ..............................................288
Component Inspection .............................................289
HEATER (REAR) .........................................................291
Description ...............................................................291
Mode ........................................................................291
ECM Terminals and Reference Value .....................291
On Board Diagnosis Logic .......................................292
DTC Confirmation Procedure ..................................292
Wiring Diagram ........................................................293
Diagnostic Procedure ..............................................295
Component Inspection .............................................296
FUNCTION (LEAN SIDE) ............................................297
On Board Diagnosis Logic .......................................297
DTC Confirmation Procedure ..................................297
Wiring Diagram ........................................................299
Diagnostic Procedure ..............................................301
FUNCTION (RICH SIDE) .............................................305
On Board Diagnosis Logic .......................................305
DTC Confirmation Procedure ..................................305
Wiring Diagram ........................................................307
Diagnostic Procedure ..............................................309
SENSOR (WHERE FITTED) . .......................................313
Component Description ...........................................313
On Board Diagnosis Logic .......................................313
DTC Confirmation Procedure ..................................313
Wiring Diagram ........................................................315
Diagnostic Procedure ..............................................316
Component Inspection .............................................317
On Board Diagnosis Logic .......................................318
DTC Confirmation Procedure ..................................318
Diagnostic Procedure ..............................................319
DTC P0325 KNOCK SENSOR (KS) ...........................324
Component Description ...........................................324
ECM Terminals and Reference Value .....................324
On Board Diagnosis Logic .......................................324
DTC Confirmation Procedure ..................................324
Wiring Diagram ........................................................325
Diagnostic Procedure ..............................................326
Component Inspection .............................................327
(POS) . ...........................................................................328
Component Description ...........................................328
ECM Terminals and Reference Value .....................328
On Board Diagnosis Logic .......................................329
DTC Confirmation Procedure ..................................329
Wiring Diagram ........................................................330
EC-3
CONTENTS (Cont’d)
Diagnostic Procedure ..............................................332
Component Inspection .............................................334
(CMPS) (PHASE) .........................................................335
Component Description ...........................................335
ECM Terminals and Reference Value .....................335
On Board Diagnosis Logic. ......................................336
DTC Confirmation Procedure ..................................336
Wiring Diagram ........................................................337
Diagnostic Procedure ..............................................339
Component Inspection .............................................342
FITTED) ........................................................................343
Description ...............................................................343
Mode ........................................................................344
ECM Terminals and Reference Value .....................344
On Board Diagnosis Logic. ......................................344
DTC Confirmation Procedure ..................................345
Wiring Diagram ........................................................347
Diagnostic Procedure ..............................................349
Component Inspection .............................................351
(CIRCUIT) . ....................................................................352
Description ...............................................................352
Mode ........................................................................353
ECM Terminals and Reference Value .....................353
On Board Diagnosis Logic. ......................................353
DTC Confirmation Procedure ..................................353
Wiring Diagram ........................................................355
Diagnostic Procedure ..............................................357
Component Inspection .............................................358
On Board Diagnosis Logic. ......................................359
DTC Confirmation Procedure ..................................359
Overall Function Check ...........................................360
Diagnostic Procedure ..............................................360
CONTROL SOLENOID VALVE (CIRCUIT) . ................364
Description ...............................................................364
Mode ........................................................................364
ECM Terminals and Reference Value .....................365
On Board Diagnosis Logic. ......................................365
DTC Confirmation Procedure ..................................365
Wiring Diagram ........................................................366
Diagnostic Procedure ..............................................368
Component Inspection .............................................369
Component Description ...........................................370
ECM Terminals and Reference Value .....................370
On Board Diagnosis Logic .......................................370
DTC Confirmation Procedure ..................................370
Wiring Diagram ........................................................372
Diagnostic Procedure ..............................................375
Description ...............................................................376
Mode ........................................................................377
ECM Terminals and Reference Value .....................377
On Board Diagnosis Logic .......................................377
DTC Confirmation Procedure ..................................377
Wiring Diagram ........................................................378
Diagnostic Procedure ..............................................380
Component Inspection .............................................384
SWITCH (WHERE FITTED) .........................................385
Component Description ...........................................385
Mode ........................................................................385
ECM Terminals and Reference Value .....................385
On Board Diagnosis Logic .......................................385
DTC Confirmation Procedure ..................................385
Overall Function Check ...........................................386
Wiring Diagram ........................................................387
Diagnostic Procedure ..............................................388
Component Inspection .............................................389
DTC P0605 ECM .........................................................391
Component Description ...........................................391
On Board Diagnosis Logic .......................................391
DTC Confirmation Procedure ..................................391
Diagnostic Procedure ..............................................392
SOLENOID VALVE ......................................................393
Component Description ...........................................393
Operation .................................................................393
Mode ........................................................................393
ECM Terminals and Reference Value .....................393
On Board Diagnosis Logic .......................................393
DTC Confirmation Procedure ..................................394
Wiring Diagram ........................................................395
Diagnostic Procedure ..............................................397
Component Inspection .............................................398
VALVE (CIRCUIT) (WHERE FITTED) .........................399
Description ...............................................................399
Mode ........................................................................399
ECM Terminals and Reference Value .....................400
Component Description ...........................................400
On Board Diagnosis Logic .......................................400
EC-4
CONTENTS (Cont’d)
DTC Confirmation Procedure ..................................400
Wiring Diagram ........................................................402
Diagnostic Procedure ..............................................403
Component Inspection .............................................404
System Description ..................................................406
Mode ........................................................................406
ECM Terminals and Reference Value .....................407
On Board Diagnosis Logic. ......................................407
Overall Function Check ...........................................408
Wiring Diagram ........................................................409
Diagnostic Procedure ..............................................410
Main 12 Causes of Overheating ..............................416
Component Inspection .............................................416
(WHERE FITTED) ........................................................418
Component Description ...........................................418
On Board Diagnosis Logic. ......................................418
DTC Confirmation Procedure ..................................418
Wiring Diagram ........................................................421
Diagnostic Procedure ..............................................423
Component Inspection .............................................424
FITTED) ........................................................................425
Description ...............................................................425
Mode ........................................................................426
ECM Terminals and Reference Value .....................426
On Board Diagnosis Logic. ......................................426
DTC Confirmation Procedure ..................................427
Wiring Diagram ........................................................429
Diagnostic Procedure ..............................................431
Component Inspection .............................................432
LINE .............................................................................434
System Description ..................................................434
ECM Terminals and Reference Value .....................434
On Board Diagnosis Logic. ......................................434
DTC Confirmation Procedure ..................................434
Wiring Diagram ........................................................435
Diagnostic Procedure ..............................................436
SWITCH .......................................................................437
Component Description ...........................................437
Mode ........................................................................437
ECM Terminals and Reference Value .....................437
On Board Diagnosis Logic. ......................................437
DTC Confirmation Procedure ..................................437
Overall Function Check ...........................................438
Wiring Diagram ........................................................439
Diagnostic Procedure ..............................................440
INTAKE AIR TEMPERATURE SENSOR ....................442
Component Description ...........................................442
Wiring Diagram ........................................................444
Diagnostic Procedure ..............................................446
Component Inspection .............................................448
HEATED OXYGEN SENSOR 1 (FRONT) ...................450
Component Description ...........................................450
Mode ........................................................................450
ECM Terminals and Reference Value .....................450
Wiring Diagram ........................................................451
Diagnostic Procedure ..............................................453
Component Inspection .............................................455
Description ...............................................................457
Mode ........................................................................457
ECM Terminals and Reference Value .....................457
Wiring Diagram ........................................................458
Diagnostic Procedure ..............................................460
Component Inspection .............................................461
HEATED OXYGEN SENSOR 2 (REAR) .....................462
Component Description ...........................................462
Mode ........................................................................462
ECM Terminals and Reference Value .....................462
Wiring Diagram ........................................................463
Diagnostic Procedure ..............................................465
Component Inspection .............................................467
Description ...............................................................469
Mode ........................................................................469
ECM Terminals and Reference Value .....................469
Wiring Diagram ........................................................470
Diagnostic Procedure ..............................................472
Component Inspection .............................................474
(WHERE FITTED) ........................................................475
Description ...............................................................475
Mode ........................................................................475
ECM Terminals and Reference Value .....................476
Component Description ...........................................476
Wiring Diagram ........................................................477
Diagnostic Procedure ..............................................478
Component Inspection .............................................482
Component Description ...........................................484
ECM Terminals and Reference Value .....................484
Wiring Diagram ........................................................485
EC-5

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