Nissan Pathfinder 2002 User Manual
GI
ENGINE CONTROL SYSTEM
MA
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CONTENTS
TROUBLE DIAGNOSIS - INDEX ....................................8
Alphabetical & P No. Index for DTC ...........................8
PRECAUTIONS .............................................................16
Supplemental Restraint System (SRS) ″AIR
BAG″ and ″SEAT BELT PRE-TENSIONER″.............16
Precautions for On Board Diagnostic (OBD)
System of Engine and A/T.........................................16
Engine Fuel & Emission Control System ..................17
Precautions................................................................18
Wiring Diagrams and Trouble Diagnosis...................19
PREPARATION .............................................................20
Special Service Tools................................................20
Commercial Service Tools.........................................20
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.........................................................................22
Engine Control Component Parts Location...............22
Circuit Diagram..........................................................26
System Diagram ........................................................27
Vacuum Hose Drawing..............................................28
System Chart.............................................................29
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...............................................30
Multiport Fuel Injection (MFI) System .......................30
Electronic Ignition (EI) System ..................................32
Air Conditioning Cut Control......................................33
Fuel Cut Control (at no load & high engine
speed)........................................................................34
Evaporative Emission System...................................34
On Board Refueling Vapor Recovery (ORVR)..........40
Positive Crankcase Ventilation..................................49
BASIC SERVICE PROCEDURE...................................51
Fuel Pressure Release..............................................51
Fuel Pressure Check.................................................51
Fuel Pressure Regulator Check ................................52
Injector.......................................................................53
How to Check Idle Speed and Ignition Timing..........54
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment.................................................................55
Idle Air Volume Learning ...........................................70
SECTION
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................72
Introduction................................................................72
Two Trip Detection Logic...........................................72
Emission-related Diagnostic Information...................73
Malfunction Indicator Lamp (MIL)..............................88
OBD System Operation Chart...................................92
CONSULT-II...............................................................97
Generic Scan Tool (GST)........................................111
TROUBLE DIAGNOSIS - INTRODUCTION................113
Introduction..............................................................113
Work Flow................................................................115
TROUBLE DIAGNOSIS - BASIC INSPECTION.........117
Basic Inspection.......................................................117
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION.............................................................130
DTC Inspection Priority Chart..................................130
Fail-safe Chart .........................................................131
Symptom Matrix Chart.............................................132
CONSULT-II Reference Value in Data Monitor
Mode........................................................................136
Major Sensor Reference Graph in Data Monitor
Mode........................................................................138
ECM Terminals and Reference Value.....................141
TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..150
Description...............................................................150
Testing Condition.....................................................150
Inspection Procedure...............................................150
Diagnostic Procedure ..............................................151
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.....................................................................154
Description...............................................................154
Diagnostic Procedure ..............................................154
TROUBLE DIAGNOSIS FOR POWER SUPPLY........155
ECM Terminals and Reference Value.....................155
Main Power Supply and Ground Circuit..................156
DTC P0011, P0021 IVT CONTROL ............................164
Description...............................................................164
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CONTENTS (Cont’d)
CONSULT-II Reference Value in Data Monitor
Mode........................................................................165
ECM Terminals and Reference Value.....................166
On Board Diagnosis Logic.......................................167
DTC Confirmation Procedure..................................167
DTC P0031, P0032, P0051, P0052 HO2S1
HEATER.......................................................................169
Description...............................................................169
CONSULT-II Reference Value in Data Monitor
Mode........................................................................169
ECM Terminals and Reference Value.....................169
On Board Diagnosis Logic.......................................169
DTC Confirmation Procedure..................................170
Wiring Diagram........................................................171
Diagnostic Procedure ..............................................173
DTC P0037, P0038, P0057, P0058 HO2S2
HEATER.......................................................................176
Description...............................................................176
CONSULT-II Reference Value in Data Monitor
Mode........................................................................176
ECM Terminals and Reference Value.....................176
On Board Diagnosis Logic.......................................177
DTC Confirmation Procedure..................................177
Wiring Diagram........................................................179
Diagnostic Procedure ..............................................181
DTC P0101 MAF SENSOR .........................................184
Component Description ...........................................184
CONSULT-II Reference Value in Data Monitor
Mode........................................................................184
ECM Terminals and Reference Value.....................184
On Board Diagnosis Logic.......................................185
DTC Confirmation Procedure..................................185
Overall Function Check...........................................186
Wiring Diagram........................................................187
Diagnostic Procedure ..............................................188
DTC P0102, P0103 MAF SENSOR.............................191
Component Description ...........................................191
CONSULT-II Reference Value in Data Monitor
Mode........................................................................191
ECM Terminals and Reference Value.....................191
On Board Diagnosis Logic.......................................192
DTC Confirmation Procedure..................................192
Wiring Diagram........................................................193
Diagnostic Procedure ..............................................194
DTC P0107, P0108 ABSOLUTE PRESSURE
SENSOR ......................................................................197
Component Description ...........................................197
On Board Diagnosis Logic.......................................197
DTC Confirmation Procedure..................................197
Diagnostic Procedure ..............................................198
DTC P0112, P0113 IAT SENSOR ...............................199
Component Description ...........................................199
On Board Diagnosis Logic.......................................199
DTC Confirmation Procedure..................................199
Wiring Diagram........................................................200
Diagnostic Procedure ..............................................201
DTC P0117, P0118 ECT SENSOR..............................203
Component Description ...........................................203
On Board Diagnosis Logic.......................................203
DTC Confirmation Procedure..................................204
Wiring Diagram........................................................205
Diagnostic Procedure ..............................................206
DTC P0121 TP SENSOR ............................................208
Description...............................................................208
CONSULT-II Reference Value in Data Monitor
Mode........................................................................208
ECM Terminals and Reference Value.....................209
On Board Diagnosis Logic.......................................209
DTC Confirmation Procedure..................................210
Wiring Diagram........................................................213
Diagnostic Procedure ..............................................214
DTC P0122, P0123 TP SENSOR................................219
Description...............................................................219
CONSULT-II Reference Value in Data Monitor
Mode........................................................................219
ECM Terminals and Reference Value.....................220
On Board Diagnosis Logic.......................................220
DTC Confirmation Procedure..................................220
Wiring Diagram........................................................222
Diagnostic Procedure ..............................................223
DTC P0125 ECT SENSOR..........................................227
Description...............................................................227
On Board Diagnosis Logic.......................................227
DTC Confirmation Procedure..................................228
Diagnostic Procedure ..............................................228
DTC P0127 IAT SENSOR ...........................................230
Component Description ...........................................230
On Board Diagnosis Logic.......................................230
DTC Confirmation Procedure..................................230
Diagnostic Procedure ..............................................231
DTC P0132, P0152 HO2S1.........................................232
Component Description ...........................................232
CONSULT-II Reference Value in Data Monitor
Mode........................................................................232
ECM Terminals and Reference Value.....................232
On Board Diagnosis Logic.......................................233
DTC Confirmation Procedure..................................233
Wiring Diagram........................................................235
Diagnostic Procedure ..............................................237
DTC P0133, P0153 HO2S1.........................................241
Component Description ...........................................241
CONSULT-II Reference Value in Data Monitor
Mode........................................................................241
ECM Terminals and Reference Value.....................241
EC-2
CONTENTS (Cont’d)
GI
On Board Diagnosis Logic.......................................242
DTC Confirmation Procedure..................................243
Overall Function Check...........................................244
Wiring Diagram........................................................245
Diagnostic Procedure ..............................................247
DTC P0134, P0154 HO2S1.........................................254
Component Description ...........................................254
CONSULT-II Reference Value in Data Monitor
Mode........................................................................254
ECM Terminals and Reference Value.....................254
On Board Diagnosis Logic.......................................255
DTC Confirmation Procedure..................................256
Overall Function Check...........................................256
Wiring Diagram........................................................258
Diagnostic Procedure ..............................................260
DTC P0138, P0158 HO2S2.........................................264
Component Description ...........................................264
CONSULT-II Reference Value in Data Monitor
Mode........................................................................264
ECM Terminals and Reference Value.....................264
On Board Diagnosis Logic.......................................264
DTC Confirmation Procedure..................................265
Overall Function Check...........................................265
Wiring Diagram........................................................267
Diagnostic Procedure ..............................................269
DTC P0139, P0159 HO2S2.........................................273
Component Description ...........................................273
CONSULT-II Reference Value in Data Monitor
Mode........................................................................273
ECM Terminals and Reference Value.....................273
On Board Diagnosis Logic.......................................273
DTC Confirmation Procedure..................................274
Overall Function Check...........................................274
Wiring Diagram........................................................276
Diagnostic Procedure ..............................................278
DTC P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION...................................................................283
On Board Diagnosis Logic.......................................283
DTC Confirmation Procedure..................................283
Wiring Diagram........................................................285
Diagnostic Procedure ..............................................287
DTC P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION...................................................................291
On Board Diagnosis Logic.......................................291
DTC Confirmation Procedure..................................291
Wiring Diagram........................................................293
Diagnostic Procedure ..............................................295
DTC P0181 FTT SENSOR ..........................................298
Component Description ...........................................298
On Board Diagnosis Logic.......................................298
DTC Confirmation Procedure..................................298
Diagnostic Procedure ..............................................299
DTC P0182, P0183 FTT SENSOR..............................301
Component Description ...........................................301
On Board Diagnosis Logic.......................................301
DTC Confirmation Procedure..................................301
Wiring Diagram........................................................303
Diagnostic Procedure ..............................................304
DTC P0217 COOLANT OVERTEMPERATURE
ENRICHMENT PROTECTION.....................................306
On Board Diagnosis Logic.......................................306
Overall Function Check...........................................306
Diagnostic Procedure ..............................................308
Main 12 Causes of Overheating..............................311
DTC P0300 - P0306 MULTIPLE CYLINDER
MISFIRE, NO.1-6CYLINDER MISFIRE..................312
On Board Diagnosis Logic.......................................312
DTC Confirmation Procedure..................................313
Diagnostic Procedure ..............................................313
DTC P0327, P0328 KS................................................320
Component Description ...........................................320
ECM Terminals and Reference Value.....................320
On Board Diagnosis Logic.......................................320
DTC Confirmation Procedure..................................320
Wiring Diagram........................................................321
Diagnostic Procedure ..............................................322
DTC P0335 CKP SENSOR (POS)..............................325
Component Description ...........................................325
CONSULT-II Reference Value in Data Monitor
Mode........................................................................325
ECM Terminals and Reference Value.....................326
On Board Diagnosis Logic.......................................326
DTC Confirmation Procedure..................................327
Wiring Diagram........................................................328
Diagnostic Procedure ..............................................329
DTC P0340 CMP SENSOR.........................................333
Component Description ...........................................333
ECM Terminals and Reference Value.....................333
On Board Diagnosis Logic.......................................333
DTC Confirmation Procedure..................................334
Wiring Diagram........................................................335
Diagnostic Procedure ..............................................336
DTC P0420, P0430 THREE WAY CATALYST
FUNCTION...................................................................338
On Board Diagnosis Logic.......................................338
DTC Confirmation Procedure..................................338
Overall Function Check...........................................339
Diagnostic Procedure ..............................................339
DTC P0441 EVAP CONTROL SYSTEM.....................343
System Description..................................................343
On Board Diagnosis Logic.......................................343
DTC Confirmation Procedure..................................344
Overall Function Check...........................................344
Diagnostic Procedure ..............................................346
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CONTENTS (Cont’d)
DTC P0442 EVAP CONTROL SYSTEM.....................354
On Board Diagnosis Logic.......................................354
DTC Confirmation Procedure..................................356
Diagnostic Procedure ..............................................357
DTC P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE ..................370
Description...............................................................370
CONSULT-II Reference Value in Data Monitor
Mode........................................................................370
ECM Terminals and Reference Value.....................371
On Board Diagnosis Logic.......................................371
DTC Confirmation Procedure..................................372
Wiring Diagram........................................................373
Diagnostic Procedure ..............................................374
DTC P0447 EVAP CANISTER VENT CONTROL
VALVE..........................................................................377
Component Description ...........................................377
CONSULT-II Reference Value in Data Monitor
Mode........................................................................377
ECM Terminals and Reference Value.....................377
On Board Diagnosis Logic.......................................377
DTC Confirmation Procedure..................................378
Wiring Diagram........................................................379
Diagnostic Procedure ..............................................380
DTC P0452 EVAP SYSTEM PRESSURE SENSOR ..384
Component Description ...........................................384
CONSULT-II Reference Value in Data Monitor
Mode........................................................................384
ECM Terminals and Reference Value.....................384
On Board Diagnosis Logic.......................................384
DTC Confirmation Procedure..................................385
Wiring Diagram........................................................386
Diagnostic Procedure ..............................................387
DTC P0453 EVAP SYSTEM PRESSURE SENSOR ..390
Component Description ...........................................390
CONSULT-II Reference Value in Data Monitor
Mode........................................................................390
ECM Terminals and Reference Value.....................390
On Board Diagnosis Logic.......................................391
DTC Confirmation Procedure..................................391
Wiring Diagram........................................................392
Diagnostic Procedure ..............................................393
DTC P0455 EVAP CONTROL SYSTEM.....................399
On Board Diagnosis Logic.......................................399
DTC Confirmation Procedure..................................400
Diagnostic Procedure ..............................................401
DTC P0456 EVAP CONTROL SYSTEM.....................412
On Board Diagnosis Logic.......................................412
DTC Confirmation Procedure..................................414
Overall Function Check...........................................415
Diagnostic Procedure ..............................................415
DTC P0460 FUEL LEVEL SENSOR...........................428
Component Description ...........................................428
On Board Diagnostic Logic......................................428
DTC Confirmation Procedure..................................428
Wiring Diagram........................................................429
Diagnostic Procedure ..............................................430
DTC P0461 FUEL LEVEL SENSOR...........................432
Component Description ...........................................432
On Board Diagnostic Logic......................................432
Overall Function Check...........................................432
DTC P0462, P0463 FUEL LEVEL SENSOR ..............434
Component Description ...........................................434
On Board Diagnostic Logic......................................434
DTC Confirmation Procedure..................................434
Wiring Diagram........................................................435
Diagnostic Procedure ..............................................436
DTC P0500 VSS..........................................................438
Component Description ...........................................438
ECM Terminals and Reference Value.....................438
On Board Diagnosis Logic.......................................438
DTC Confirmation Procedure..................................439
Overall Function Check...........................................439
Wiring Diagram........................................................441
Diagnostic Procedure ..............................................442
DTC P0505 ISC SYSTEM ...........................................443
Description...............................................................443
CONSULT-II Reference Value in Data Monitor
Mode........................................................................444
ECM Terminals and Reference Value.....................444
On Board Diagnosis Logic.......................................444
DTC Confirmation Procedure..................................444
Wiring Diagram........................................................446
Diagnostic Procedure ..............................................447
DTC P0506 ISC SYSTEM ...........................................450
Description...............................................................450
CONSULT-II Reference Value in Data Monitor
Mode........................................................................451
ECM Terminals and Reference Value.....................451
On Board Diagnosis Logic.......................................451
DTC Confirmation Procedure..................................451
Wiring Diagram........................................................453
Diagnostic Procedure ..............................................454
DTC P0507 ISC SYSTEM ...........................................459
Description...............................................................459
CONSULT-II Reference Value in Data Monitor
Mode........................................................................460
ECM Terminals and Reference Value.....................460
On Board Diagnosis Logic.......................................460
DTC Confirmation Procedure..................................460
Wiring Diagram........................................................462
Diagnostic Procedure ..............................................463
DTC P0510 CTP SENSOR..........................................468
Component Description ...........................................468
EC-4
CONTENTS (Cont’d)
GI
CONSULT-II Reference Value in Data Monitor
Mode........................................................................468
ECM Terminals and Reference Value.....................468
On Board Diagnosis Logic.......................................468
DTC Confirmation Procedure..................................469
Overall Function Check...........................................469
Wiring Diagram........................................................471
Diagnostic Procedure ..............................................472
DTC P0600 A/T CONTROL.........................................476
System Description..................................................476
ECM Terminals and Reference Value.....................476
On Board Diagnosis Logic.......................................476
DTC Confirmation Procedure..................................476
Wiring Diagram........................................................477
Diagnostic Procedure ..............................................478
DTC P0605 ECM .........................................................479
Component Description ...........................................479
On Board Diagnosis Logic.......................................479
DTC Confirmation Procedure..................................479
Diagnostic Procedure ..............................................480
DTC P1102 MAF SENSOR .........................................481
Component Description ...........................................481
CONSULT-II Reference Value in Data Monitor
Mode........................................................................481
ECM Terminals and Reference Value.....................481
On Board Diagnosis Logic.......................................482
DTC Confirmation Procedure..................................482
Wiring Diagram........................................................483
Diagnostic Procedure ..............................................484
DTC P1111, P1136 IVT CONTROL SOLENOID
VALVE..........................................................................487
Component Description ...........................................487
CONSULT-II Reference Value in Data Monitor
Mode........................................................................487
ECM Terminals and Reference Value.....................487
On Board Diagnosis Logic.......................................488
DTC Confirmation Procedure..................................488
Wiring Diagram........................................................489
Diagnostic Procedure ..............................................491
DTC P1130 SWIRL CONTROL VALVE CONTROL
SOLENOID VALVE......................................................493
Description...............................................................493
CONSULT-II Reference Value in Data Monitor
Mode........................................................................494
ECM Terminals and Reference Value.....................494
On Board Diagnosis Logic.......................................495
DTC Confirmation Procedure..................................495
Wiring Diagram........................................................497
Diagnostic Procedure ..............................................498
DTC P1131 SWIRL CONTROL VALVE CONTROL
SOLENOID VALVE......................................................516
Component Description ...........................................516
CONSULT-II Reference Value in Data Monitor
Mode........................................................................516
ECM Terminals and Reference Value.....................516
On Board Diagnosis Logic.......................................516
DTC Confirmation Procedure..................................517
Wiring Diagram........................................................518
Diagnostic Procedure ..............................................519
DTC P1140, P1145 INTAKE VALVE TIMING
CONTROL POSITION SENSOR.................................522
Component Description ...........................................522
CONSULT-II Reference Value in Data Monitor
Mode........................................................................522
ECM Terminals and Reference Value.....................523
On Board Diagnosis Logic.......................................523
DTC Confirmation Procedure..................................524
Wiring Diagram........................................................525
Diagnostic Procedure ..............................................527
DTC P1143, P1163 HO2S1 .........................................531
Component Description ...........................................531
CONSULT-II Reference Value in Data Monitor
Mode........................................................................531
ECM Terminals and Reference Value.....................531
On Board Diagnosis Logic.......................................532
DTC Confirmation Procedure..................................532
Overall Function Check...........................................533
Diagnostic Procedure ..............................................534
DTC P1144, P1164 HO2S1 .........................................539
Component Description ...........................................539
CONSULT-II Reference Value in Data Monitor
Mode........................................................................539
ECM Terminals and Reference Value.....................539
On Board Diagnosis Logic.......................................540
DTC Confirmation Procedure..................................540
Overall Function Check...........................................541
Diagnostic Procedure ..............................................542
DTC P1146, P1166 HO2S2 .........................................547
Component Description ...........................................547
CONSULT-II Reference Value in Data Monitor
Mode........................................................................547
ECM Terminals and Reference Value.....................547
On Board Diagnosis Logic.......................................547
DTC Confirmation Procedure..................................548
Overall Function Check...........................................548
Wiring Diagram........................................................550
Diagnostic Procedure ..............................................552
DTC P1147, P1167 HO2S2 .........................................557
Component Description ...........................................557
CONSULT-II Reference Value in Data Monitor
Mode........................................................................557
ECM Terminals and Reference Value.....................557
On Board Diagnosis Logic.......................................557
DTC Confirmation Procedure..................................558
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CONTENTS (Cont’d)
Overall Function Check...........................................558
Wiring Diagram........................................................560
Diagnostic Procedure ..............................................562
DTC P1148, P1168 CLOSED LOOP CONTROL........567
On Board Diagnosis Logic.......................................567
DTC Confirmation Procedure..................................567
Overall Function Check...........................................568
Diagnostic Procedure ..............................................568
DTC P1165 SWIRL CONTROL VALVE CONTROL
VACUUM CHECK SWITCH.........................................569
Component Description ...........................................569
CONSULT-II Reference Value in Data Monitor
Mode........................................................................569
ECM Terminals and Reference Value.....................569
On Board Diagnosis Logic.......................................570
DTC Confirmation Procedure..................................570
Wiring Diagram........................................................571
Diagnostic Procedure ..............................................572
DTC P1217 ENGINE OVER TEMPERATURE............575
On Board Diagnosis Logic.......................................575
Overall Function Check...........................................575
Diagnostic Procedure ..............................................576
Main 12 Causes of Overheating..............................579
DTC P1335 CKP SENSOR .........................................580
Component Description ...........................................580
CONSULT-II Reference Value in Data Monitor
Mode........................................................................580
ECM Terminals and Reference Value.....................580
On Board Diagnosis Logic.......................................581
DTC Confirmation Procedure..................................581
Wiring Diagram........................................................582
Diagnostic Procedure ..............................................583
DTC P1336 CKP SENSOR (POS)..............................586
Component Description ...........................................586
CONSULT-II Reference Value in Data Monitor
Mode........................................................................586
ECM Terminals and Reference Value.....................587
On Board Diagnosis Logic.......................................587
DTC Confirmation Procedure..................................587
Wiring Diagram........................................................588
Diagnostic Procedure ..............................................589
DTC P1444 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE...................................594
Description...............................................................594
CONSULT-II Reference Value in Data Monitor
Mode........................................................................594
ECM Terminals and Reference Value.....................595
On Board Diagnosis Logic.......................................595
DTC Confirmation Procedure..................................595
Wiring Diagram........................................................597
Diagnostic Procedure ..............................................598
DTC P1446 EVAP CANISTER VENT CONTROL
VALVE..........................................................................606
Component Description ...........................................606
CONSULT-II Reference Value in Data Monitor
Mode........................................................................606
ECM Terminals and Reference Value.....................606
On Board Diagnosis Logic.......................................606
DTC Confirmation Procedure..................................607
Wiring Diagram........................................................608
Diagnostic Procedure ..............................................609
DTC P1448 EVAP CANISTER VENT CONTROL
VALVE..........................................................................614
Component Description ...........................................614
CONSULT-II Reference Value in Data Monitor
Mode........................................................................614
ECM Terminals and Reference Value.....................614
On Board Diagnosis Logic.......................................614
DTC Confirmation Procedure..................................615
Overall Function Check...........................................616
Wiring Diagram........................................................617
Diagnostic Procedure ..............................................618
DTC P1456 EVAP CONTROL SYSTEM.....................623
On Board Diagnosis Logic.......................................623
DTC Confirmation Procedure..................................625
Overall Function Check...........................................626
Diagnostic Procedure ..............................................626
DTC P1464 FUEL LEVEL SENSOR...........................639
Component Description ...........................................639
On Board Diagnostic Logic......................................639
DTC Confirmation Procedure..................................639
Wiring Diagram........................................................640
Diagnostic Procedure ..............................................641
DTC P1490 VACUUM CUT VALVE BYPASS
VALVE..........................................................................642
Description...............................................................642
CONSULT-II Reference Value in Data Monitor
Mode........................................................................642
ECM Terminals and Reference Value.....................642
On Board Diagnosis Logic.......................................643
DTC Confirmation Procedure..................................643
Wiring Diagram........................................................644
Diagnostic Procedure ..............................................645
DTC P1491 VACUUM CUT VALVE BYPASS
VALVE..........................................................................648
Description...............................................................648
CONSULT-II Reference Value in Data Monitor
Mode........................................................................648
ECM Terminals and Reference Value.....................648
On Board Diagnosis Logic.......................................649
DTC Confirmation Procedure..................................649
Overall Function Check...........................................650
Wiring Diagram........................................................651
EC-6
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Diagnostic Procedure ..............................................652
DTC P1605 A/T DIAGNOSIS COMMUNICATION
LINE .............................................................................660
Component Description ...........................................660
On Board Diagnosis Logic.......................................660
DTC Confirmation Procedure..................................660
DTC P1706 PNP SWITCH...........................................661
Component Description ...........................................661
CONSULT-II Reference Value in Data Monitor
Mode........................................................................661
ECM Terminals and Reference Value.....................661
On Board Diagnosis Logic.......................................661
DTC Confirmation Procedure..................................662
Overall Function Check...........................................662
Wiring Diagram........................................................664
Diagnostic Procedure ..............................................665
VARIABLE INDUCTION AIR CONTROL SYSTEM
(VIAS)...........................................................................669
Description...............................................................669
ECM Terminals and Reference Value.....................670
Wiring Diagram........................................................671
Diagnostic Procedure ..............................................672
IGNITION SIGNAL.......................................................677
Component Description ...........................................677
ECM Terminals and Reference Value.....................677
Wiring Diagram........................................................678
Diagnostic Procedure ..............................................681
INJECTOR ...................................................................687
Component Description ...........................................687
CONSULT-II Reference Value in Data Monitor
Mode........................................................................687
ECM Terminals and Reference Value.....................687
Wiring Diagram........................................................688
Diagnostic Procedure ..............................................689
START SIGNAL...........................................................692
CONSULT-II Reference Value in Data Monitor
Mode........................................................................692
ECM Terminals and Reference Value.....................692
Wiring Diagram........................................................693
Diagnostic Procedure ..............................................694
FUEL PUMP.................................................................696
System Description..................................................696
Component Description ...........................................696
CONSULT-II Reference Value in Data Monitor
Mode........................................................................696
ECM Terminals and Reference Value.....................697
Wiring Diagram........................................................698
Diagnostic Procedure ..............................................699
POWER STEERING OIL PRESSURE SWITCH.........705
Component Description ...........................................705
CONSULT-II Reference Value in Data Monitor
Mode........................................................................705
ECM Terminals and Reference Value.....................705
Wiring Diagram........................................................706
Diagnostic Procedure ..............................................707
REFRIGERANT PRESSURE SENSOR......................710
Description...............................................................710
ECM Terminals and Reference Value.....................710
Wiring Diagram........................................................711
Diagnostic Procedure ..............................................712
ELECTRICAL LOAD SIGNAL.....................................715
ECM Terminals and Reference Value.....................715
Wiring Diagram........................................................716
Diagnostic Procedure ..............................................717
MIL & DATA LINK CONNECTORS............................720
Wiring Diagram........................................................720
SERVICE DATA AND SPECIFICATIONS (SDS).......721
Fuel Pressure Regulator..........................................721
Idle Speed and Ignition Timing................................721
Mass Air Flow Sensor..............................................721
Engine Coolant Temperature Sensor......................721
Heated Oxygen Sensor 1 Heater............................721
Fuel Pump ...............................................................721
IACV-AAC Valve......................................................721
Injector.....................................................................721
Throttle Position Sensor..........................................722
Calculated Load Value.............................................722
Intake Air Temperature Sensor................................722
Heated Oxygen Sensor 2 Heater............................722
Crankshaft Position Sensor (REF) ..........................722
Fuel Tank Temperature Sensor ...............................722
Camshaft Position Sensor (PHASE) .......................722
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Alphabetical & P No. Index for DTC
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC
ALPHABETICAL INDEX FOR DTC
Items
(CONSULT-II screen terms)
Unable to access ECM — — EC-131
A/T 1ST GR FNCTN P0731 0731 AT-120
A/T 2ND GR FNCTN P0732 0732 AT-126
A/T 3RD GR FNCTN P0733 0733 AT-132
A/T 4TH GR FNCTN P0734 0734 AT-138
A/T COMM LINE P0600 0600 EC-476
A/T DIAG COMM LINE P1605 1605 EC-660
A/T TCC S/V FNCTN P0744 0744 AT-153
ABSL PRES SEN/CIRC P0107 0107 EC-197
ABSL PRES SEN/CIRC P0108 0108 EC-197
THRTL POS SEN/CIRC*5 P0121 0121 EC-208
ATF TEMP SEN/CIRC P0710 0710 AT-105
CONSULT-II
GST*2
DTC*1
Reference page
ECM*3
NAEC0001
NAEC0001S01
CKP SEN (REF)/CIRC P1335 1335 EC-580
CKP SENSOR (COG) P1336 1336 EC-586
CKP SEN/CIRCUIT P0335 0335 EC-325
CLOSED LOOP-B1 P1148 1148 EC-567
CLOSED LOOP-B2 P1168 1168 EC-567
CLOSED TP SW/CIRC P0510 0510 EC-468
CMP SEN/CIRCUIT P0340 0340 EC-333
CYL 1 MISFIRE P0301 0301 EC-312
CYL 2 MISFIRE P0302 0302 EC-312
CYL 3 MISFIRE P0303 0303 EC-312
CYL 4 MISFIRE P0304 0304 EC-312
CYL 5 MISFIRE P0305 0305 EC-312
CYL 6 MISFIRE P0306 0306 EC-312
ECM P0605 0605 EC-479
ECT SEN/CIRC*5 P0117 0117 EC-203
ECT SEN/CIRC*5 P0118 0118 EC-203
ECT SENSOR*5 P0125 0125 EC-227
ENG OVER TEMP P0217 0217 EC-306
ENG OVER TEMP P1217 1217 EC-575
ENGINE SPEED SIG P0725 0725 AT-116
EVAP VERY SML LEAK P0456 0456 EC-412
EVAP VERY SML LEAK P1456 1456 EC-623
EC-8
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
Items
(CONSULT-II screen terms)
EVAP GROSS LEAK P0455 0455 EC-399
EVAP PURG FLOW/MON P0441 0441 EC-343
EVAP SMALL LEAK P0442 0442 EC-354
EVAP SYS PRES SEN P0452 0452 EC-384
EVAP SYS PRES SEN P0453 0453 EC-390
FTT SEN/CIRCUIT P0182 0182 EC-301
FTT SEN/CIRCUIT P0183 0183 EC-301
FTT SENSOR P0181 0181 EC-298
FUEL LEV SEN SLOSH P0460 0460 EC-428
FUEL LEVEL SENSOR P0461 0461 EC-432
FUEL LEVL SEN/CIRC P0462 0462 EC-434
FUEL LEVL SEN/CIRC P0463 0463 EC-434
FUEL LEVL SEN/CIRC P1464 1464 EC-639
FUEL SYS-LEAN-B1 P0171 0171 EC-283
CONSULT-II
GST*2
DTC*1
Reference page
ECM*3
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FUEL SYS-LEAN-B2 P0174 0174 EC-283
FUEL SYS-RICH-B1 P0172 0172 EC-291
FUEL SYS-RICH-B2 P0175 0175 EC-291
HO2S1 (B1) P0132 0132 EC-232
HO2S1 (B1) P0133 0133 EC-241
HO2S1 (B1) P0134 0134 EC-254
HO2S1 (B1) P1143 1143 EC-531
HO2S1 (B1) P1144 1144 EC-539
HO2S1 (B2) P0152 0152 EC-232
HO2S1 (B2) P0153 0153 EC-241
HO2S1 (B2) P0154 0154 EC-254
HO2S1 (B2) P1163 1163 EC-531
HO2S1 (B2) P1164 1164 EC-539
HO2S1 HTR (B1) P0031 0031 EC-169
HO2S1 HTR (B1) P0032 0032 EC-169
HO2S1 HTR (B2) P0051 0051 EC-169
HO2S1 HTR (B2) P0052 0052 EC-169
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HO2S2 (B1) P0138 0138 EC-264
HO2S2 (B1) P0139 0139 EC-273
HO2S2 (B1) P1146 1146 EC-547
HO2S2 (B1) P1147 1147 EC-557
HO2S2 (B2) P0158 0158 EC-264
EC-9
SC
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IDX
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
Items
(CONSULT-II screen terms)
HO2S2 (B2) P0159 0159 EC-273
HO2S2 (B2) P1166 1166 EC-547
HO2S2 (B2) P1167 1167 EC-557
HO2S2 HTR (B1) P0037 0037 EC-176
HO2S2 HTR (B1) P0038 0038 EC-176
HO2S2 HTR (B2) P0057 0057 EC-176
HO2S2 HTR (B2) P0058 0058 EC-176
IAT SEN/CIRCUIT*6 P0112 0112 EC-199
IAT SEN/CIRCUIT*6 P0113 0113 EC-199
IAT SENSOR P0127 0127 EC-230
INT/V TIM CONT-B1 P0011 0011 EC-164
INT/V TIM CONT-B2 P0021 0021 EC-164
INT/V TIM V/CIR-B1 P1111 1111 EC-487
INT/V TIM V/CIR-B2 P1136 1136 EC-487
CONSULT-II
GST*2
DTC*1
Reference page
ECM*3
INTK TIM S/CIRC-B1 P1140 1140 EC-522
INTK TIM S/CIRC-B2 P1145 1145 EC-522
ISC SYSTEM P0506 0506 EC-450
ISC SYSTEM P0507 0507 EC-459
ISC SYSTEM/CIRC P0505 0505 EC-443
KNOCK SEN/CIRC-B1 P0328*2 0328 EC-320
KNOCK SEN/CIRC-B1 P0327*2 0327 EC-320
L/PRESS SOL/CIRC P0745 0745 AT-162
MAF SEN/CIRCUIT*5 P0101 0101 EC-184
MAF SEN/CIRCUIT*5 P0102 0102 EC-191
MAF SEN/CIRCUIT*5 P0103 0103 EC-191
MAF SENSOR*5 P1102 1102 EC-481
MULTI CYL MISFIRE P0300 0300 EC-312
NATS MALFUNCTION P1610-P1615 1610-1615 EL-385
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.
No DTC Flashing*4 EC-89
P0000 0000 —
O/R CLTCH SOL/CIRC P1760 1760 AT-185
P-N POS SW/CIRCUIT P1706 1706 EC-661
PNP SW/CIRC P0705 0705 AT-99
PURG VOLUME CONT/V P0444 0444 EC-370
EC-10
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
Items
(CONSULT-II screen terms)
PURG VOLUME CONT/V P0445 0445 EC-370
PURG VOLUME CONT/V P1444 1444 EC-594
SFT SOL A/CIRC*5 P0750 0750 AT-168
SFT SOL B/CIRC*5 P0755 0755 AT-172
SWIRL CONT SOL/V P1130 1130 EC-493
SWIRL CONT SOL/V P1131 1131 EC-516
SWL CON VC SW/CIRC P1165 1165 EC-569
TCC SOLENOID/CIRC P0740 0740 AT-148
TP SEN/CIRC A/T*5 P1705 1705 AT-176
TP SEN/CIRCUIT*5 P0122 0122 EC-219
TP SEN/CIRCUIT*5 P0123 0123 EC-219
TW CATALYST SYS-B1 P0420 0420 EC-338
TW CATALYST SYS-B2 P0430 0430 EC-338
VC/V BYPASS/V P1490 1490 EC-642
CONSULT-II
GST*2
DTC*1
Reference page
ECM*3
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VC CUT/V BYPASS/V P1491 1491 EC-648
VEH SPD SEN/CIR AT*6 P0720 0720 AT-111
VEH SPEED SEN/CIRC*6 P0500 0500 EC-438
VENT CONTROL VALVE P0447 0447 EC-377
VENT CONTROL VALVE P1446 1446 EC-606
VENT CONTROL VALVE P1448 1448 EC-614
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: When the fail-safe operation occurs, the MIL illuminates.
*6: When fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
NOTE:
I Regarding R50 models, “-B1” indicates bank 1 and “-B2” indicates left bank 2.
I Bank 1 (-B1) includes No. 1 cylinder.
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EC-11
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IDX
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
P NO. INDEX FOR DTC
DTC*1
CONSULT-II
GST*2
— — Unable to access ECM EC-131
No DTC Flashing*4
P0000 0000
P0011 0011 INT/V TIM CONT-B1 EC-164
P0021 0021 INT/V TIM CONT-B2 EC-164
P0031 0031 HO2S1 HTR (B1) EC-169
P0032 0032 HO2S1 HTR (B1) EC-169
P0037 0037 HO2S2 HTR (B1) EC-176
P0038 0038 HO2S2 HTR (B1) EC-176
P0051 0051 HO2S1 HTR (B2) EC-169
P0052 0052 HO2S1 HTR (B2) EC-169
ECM*3
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.
(CONSULT-II screen terms)
Items
=NAEC0001S02
Reference page
EC-89
—
P0057 0057 HO2S2 HTR (B2) EC-176
P0058 0058 HO2S2 HTR (B2) EC-176
P0101 0101 MAF SEN/CIRCUIT*5 EC-184
P0102 0102 MAF SEN/CIRCUIT*5 EC-191
P0103 0103 MAF SEN/CIRCUIT*5 EC-191
P0107 0107 ABSL PRES SEN/CIRC EC-197
P0108 0108 ABSL PRES SEN/CIRC EC-197
P0112 0112 IAT SEN/CIRCUIT*6 EC-199
P0113 0113 IAT SEN/CIRCUIT*6 EC-199
P0117 0117 ECT SEN/CIRC*5 EC-203
P0118 0118 ECT SEN/CIRC*5 EC-203
P0121 0121 THRTL POS SEN/CIRC*5 EC-208
P0122 0122 TP SEN/CIRCUIT*5 EC-219
P0123 0123 TP SEN/CIRCUIT*5 EC-219
P0125 0125 ECT SENSOR*5 EC-227
P0127 0127 IAT SENSOR EC-230
P0132 0132 HO2S1 (B1) EC-232
P0133 0133 HO2S1 (B1) EC-241
P0134 0134 HO2S1 (B1) EC-254
P0138 0138 HO2S2 (B1) EC-264
P0139 0139 HO2S2 (B1) EC-273
P0152 0152 HO2S1 (B2) EC-232
EC-12
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
DTC*1
CONSULT-II
GST*2
P0153 0153 HO2S1 (B2) EC-241
P0154 0154 HO2S1 (B2) EC-254
P0158 0158 HO2S2 (B2) EC-264
P0159 0159 HO2S2 (B2) EC-273
P0171 0171 FUEL SYS-LEAN-B1 EC-283
P0172 0172 FUEL SYS-RICH-B1 EC-291
P0174 0174 FUEL SYS-LEAN-B2 EC-283
P0175 0175 FUEL SYS-RICH-B2 EC-291
P0181 0181 FTT SENSOR EC-298
P0182 0182 FTT SEN/CIRCUIT EC-301
P0183 0183 FTT SEN/CIRCUIT EC-301
P0217 0217 ENG OVER TEMP EC-306
P0300 0300 MULTI CYL MISFIRE EC-312
P0301 0301 CYL 1 MISFIRE EC-312
ECM*3
(CONSULT-II screen terms)
Items
Reference page
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P0302 0302 CYL 2 MISFIRE EC-312
P0303 0303 CYL 3 MISFIRE EC-312
P0304 0304 CYL 4 MISFIRE EC-312
P0305 0305 CYL 5 MISFIRE EC-312
P0306 0306 CYL 6 MISFIRE EC-312
P0327 0327 KNOCK SEN/CIRC-B1 EC-320
P0328 0328 KNOCK SEN/CIRC-B1 EC-320
P0335 0335 CKP SEN/CIRCUIT EC-325
P0340 0340 CMP SEN/CIRCUIT EC-333
P0420 0420 TW CATALYST SYS-B1 EC-338
P0430 0430 TW CATALYST SYS-B2 EC-338
P0441 0441 EVAP PURG FLOW/MON EC-343
P0442 0442 EVAP SMALL LEAK EC-354
P0444 0444 PURG VOLUME CONT/V EC-370
P0445 0445 PURG VOLUME CONT/V EC-370
P0447 0447 VENT CONTROL VALVE EC-377
P0452 0452 EVAP SYS PRES SEN EC-384
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P0453 0453 EVAP SYS PRES SEN EC-390
P0455 0455 EVAP GROSS LEAK EC-399
P0456 0456 EVAP VERY SML LEAK EC-412
P0460 0460 FUEL LEV SEN SLOSH EC-428
P0461 0461 FUEL LEVEL SENSOR EC-432
EC-13
SC
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IDX
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
DTC*1
CONSULT-II
GST*2
P0462 0462 FUEL LEVL SEN/CIRC EC-434
P0463 0463 FUEL LEVL SEN/CIRC EC-434
P0500 0500 VEH SPEED SEN/CIRC*6 EC-438
P0505 0505 ISC SYSTEM/CIRC EC-443
P0506 0506 ISC SYSTEM EC-450
P0507 0507 ISC SYSTEM EC-459
P0510 0510 CLOSED TP SW/CIRC EC-468
P0600*2 0600 A/T COMM LINE EC-476
P0605 0605 ECM EC-479
P0705 0705 PNP SW/CIRC AT-99
P0710 0710 ATF TEMP SEN/CIRC AT-105
P0720 0720 VEH SPD SEN/CIR AT*4 AT-111
P0725 0725 ENGINE SPEED SIG AT-116
P0731 0731 A/T 1ST GR FNCTN AT-120
ECM*3
(CONSULT-II screen terms)
Items
Reference page
P0732 0732 A/T 2ND GR FNCTN AT-126
P0733 0733 A/T 3RD GR FNCTN AT-132
P0734 0734 A/T 4TH GR FNCTN AT-138
P0740 0740 TCC SOLENOID/CIRC AT-148
P0744 0744 A/T TCC S/V FNCTN AT-153
P0745 0745 L/PRESS SOL/CIRC AT-162
P0750 0750 SFT SOL A/CIRC*3 AT-168
P0755 0755 SFT SOL B/CIRC*3 AT-172
P1102 1102 MAF SENSOR*3 EC-481
P1111 1111 INT/V TIM V/CIR-B1 EC-487
P1130 1130 SWIRL CONT SOL/V EC-493
P1131 1131 SWIRL CONT SOL/V EC-516
P1136 1136 INT/V TIM V/CIR-B2 EC-487
P1140 1140 INTK TIM S/CIRC-B1 EC-522
P1143 1143 HO2S1 (B1) EC-531
P1144 1144 HO2S1 (B1) EC-539
P1145 1145 INTK TIM S/CIRC-B2 EC-522
P1146 1146 HO2S2 (B1) EC-547
P1147 1147 HO2S2 (B1) EC-557
P1148 1148 CLOSED LOOP-B1 EC-567
P1163 1163 HO2S1 (B2) EC-531
P1164 1164 HO2S1 (B2) EC-539
EC-14
TROUBLE DIAGNOSIS — INDEX
Alphabetical & P No. Index for DTC (Cont’d)
DTC*1
CONSULT-II
GST*2
P1165 1165 SWL CON VC SW/CIRC EC-569
P1166 1166 HO2S2 (B2) EC-547
P1167 1167 HO2S2 (B2) EC-557
P1168 1168 CLOSED LOOP-B2 EC-567
P1217 1217 ENG OVER TEMP EC-575
P1335 1335 CKP SEN (REF)/CIRC EC-580
P1336 1336 CKP SENSOR (COG) EC-586
P1444 1444 PURG VOLUME CONT/V EC-594
P1446 1446 VENT CONTROL VALVE EC-606
P1448 1448 VENT CONTROL VALVE EC-614
P1456 1456 EVAP VERY SML LEAK EC-623
P1464 1464 FUEL LEVL SEN/CIRC EC-639
P1490 1490 VC/V BYPASS/V EC-642
P1491 1491 VC CUT/V BYPASS/V EC-648
ECM*3
(CONSULT-II screen terms)
Items
Reference page
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P1605 1605 A/T DIAG COMM LINE EC-660
P1610-P1615 1610-1615 NATS MALFUNCTION EL-385
P1705 1705 TP SEN/CIRC A/T*3 AT-176
P1706 1706 P-N POS SW/CIRCUIT EC-661
P1760 1760 O/R CLTCH SOL/CIRC AT-185
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: When the fail-safe operation occurs, the MIL illuminates.
*6: When fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
NOTE:
I Regarding R50 models, “-B1” indicates right bank 1 and “-B2” indicates bank 2.
I Bank 1 (-B1) includes No. 1 cylinder.
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EC-15
SC
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IDX
PRECAUTIONS
Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”
Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL R50 is as follows:
I For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steering wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
I For a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness,
warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized NISSAN dealer.
I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, refer to RS section.
I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow harness connector (and by yellow harness protector or yellow insulation tape before the harness connectors).
NAEC0002
Precautions for On Board Diagnostic (OBD) System of Engine and A/T
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
I Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MIL to light up.
I Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
I Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector. For description and how to disconnect, refer to EL-6, “HARNESS
CONNECTOR (SLIDE-LOCKING TYPE)”.
I Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL to light up due to the short circuit.
I Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the fuel injection system, etc.
I Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
NAEC0003
EC-16
PRECAUTIONS
Engine Fuel & Emission Control System
Engine Fuel & Emission Control System
NAEC0004
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EC-17
SC
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SEF952RK
IDX
Precautions
PRECAUTIONS
SEF289H
SEF908W
Precautions
NAEC0005
I Before connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect negative battery terminal. Failure to do so may damage the
ECM because battery voltage is applied to ECM even if
ignition switch is turned off.
I When connecting ECM harness connector, fasten it
securely with a lever as far as it will go as shown at left.
I When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminal, when connecting pin connectors.
SEF291H
MEF040D
SEF217U
I Before replacing ECM, perform “ECM Terminals and Ref-
erence Value” inspection and make sure ECM functions
properly. Refer to EC-141.
I After performing each TROUBLE DIAGNOSIS, perform
“DTC Confirmation Procedure” or “Overall Function
Check”.
The DTC should not be displayed in the “DTC Confirmation Procedure” if the repair is completed. The “Overall
Function Check” should be a good result if the repair is
completed.
EC-18
PRECAUTIONS
Precautions (Cont’d)
SEF348N
I When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
I Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the
ECM’s transistor. Use a ground other than the ECM
terminals, such as the ground.
I Regarding model R50, “-B1” indicates the right bank and
“-B2” indicates the left bank as shown in the figure.
I Bank 1 includes No. 1 cylinder.
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SEF099WB
Wiring Diagrams and Trouble Diagnosis
When you read Wiring diagrams, refer to the following:
I GI-11, “HOW TO READ WIRING DIAGRAMS”
I EL-9, “POWER SUPPLY ROUTING” for power distribution circuit
When you perform trouble diagnosis, refer to the following:
I GI-35, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES”
I GI-24, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”
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EC-19
EL
IDX
Special Service Tools
PREPARATION
Special Service Tools
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name
KV10117100
(J36471-A)
Heated oxygen sensor
wrench
(J44321)
Fuel pressure gauge kit
Description
Loosening or tightening heated oxygen sensor
(bank 1)/(bank 2) with 22 mm (0.87 in) hexagon
nut
NT379
Checking fuel pressure with pressure gauge
LEC642
Commercial Service Tools
Tool name
(Kent-Moore No.)
Description
NAEC0007
NAEC0008
Fuel filler cap adapter
i.e.: (MLR-8382)
Leak detector
i.e.: (J41416)
EVAP service port
adapter
i.e.: (J41413-OBD)
Checking fuel tank vacuum relief valve opening
pressure
NT815
Locating the EVAP leak
NT703
Applying positive pressure through EVAP service
port
NT704
EC-20
PREPARATION
Commercial Service Tools (Cont’d)
Tool name
(Kent-Moore No.)
Socket wrench
Oxygen sensor thread
cleaner
i.e.: (J-43897-18)
(J-43897-12)
Anti-seize lubricant
i.e.: (Permatex
or equivalent meeting
MIL specification MIL-A-
907)
TM
133AR
Description
NT705
AEM488
Removing and installing engine coolant temperature sensor
Reconditioning the exhaust system threads before
installing a new oxygen sensor. Use with antiseize lubricant shown below.
a: J-43897-18 18 mm diameter with pitch 1.5
mm, for Zirconia Oxygen Sensor
b: J-43897-12 12 mm diameter with pitch 1.25
mm, for Titania Oxygen Sensor
Lubricating oxygen sensor thread cleaning tool
when reconditioning exhaust system threads.
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NT779
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EC-21
EL
IDX
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Engine Control Component Parts Location
Engine Control Component Parts Location
NAEC0009
EC-22
SEF952ZA
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Engine Control Component Parts Location (Cont’d)
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EC-23
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SEF034ZA
IDX
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Engine Control Component Parts Location (Cont’d)
EC-24
SEF584ZA
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Engine Control Component Parts Location (Cont’d)
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EC-25
HA
SEC935C
SC
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IDX
Circuit Diagram
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Circuit Diagram
NAEC0010
EC-26
MEC668D
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
System Diagram
System Diagram
NAEC0011
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EC-27
SC
EL
SEC663D
IDX
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
Vacuum Hose Drawing
Vacuum Hose Drawing
Refer to “System Diagram”, EC-27 for Vacuum Control System.
NAEC0012
EC-28
SEF953Z
ENGINE AND EMISSION CONTROL OVERALL SYSTEM
System Chart
Input (Sensor) ECM Function Output (Actuator)
I Camshaft position sensor (PHASE)
I Crankshaft position sensor (REF)
I Mass air flow sensor
I Engine coolant temperature sensor
I Heated oxygen sensor 1
I Ignition switch
I Throttle position sensor
I Closed throttle position switch *3
I Park/neutral position (PNP) switch
I Air conditioner switch
I Knock sensor
I Intake air temperature sensor
I Absolute pressure sensor
I EVAP control system pressure sensor *1
I Battery voltage
I Power steering oil pressure switch
I Vehicle speed sensor
I Fuel tank temperature sensor *1
I Crankshaft position sensor (POS)
I Heated oxygen sensor 2*2
I TCM (Transmission control module)
I Refrigerant pressure sensor
I Electrical load
I Fuel level sensor*1
System Chart
Fuel injection & mixture ratio control Injectors
Electronic ignition system Power transistor
Idle air control system IACV-AAC valve
Fuel pump control Fuel pump relay
On board diagnostic system MIL (On the instrument panel)
Swirl control valve control
Power valve control VIAS control solenoid valve
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow control
Air conditioning cut control Air conditioner relay
ON BOARD DIAGNOSIS for EVAP system
Swirl control valve control solenoid
valve
EVAP canister purge volume control solenoid valve
I EVAP canister vent control valve
I Vacuum cut valve bypass valve
NAEC0013
GI
MA
EM
LC
FE
CL
MT
AT
*1: These sensors are not used to control the engine system. They are used only for the on board diagnosis.
*2: This sensor is not used to control the engine system under normal conditions.
*3: This switch will operate in place of the throttle position sensor to control EVAP parts if the sensor malfunctions.
TF
PD
AX
SU
BR
ST
RS
BT
HA
EC-29
SC
EL
IDX
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION
Multiport Fuel Injection (MFI) System
Multiport Fuel Injection (MFI) System
DESCRIPTION
Input/Output Signal Chart
Sensor Input Signal to ECM
Crankshaft position sensor (POS) Engine speed (POS signal)
Crankshaft position sensor (REF) Engine speed (REF signal)
Camshaft position sensor (PHASE) Piston position
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
ECM func-
tion
NAEC0014
NAEC0014S01
Actuator
Throttle position sensor
Park/neutral position (PNP) switch Gear position
Vehicle speed sensor Vehicle speed
Ignition switch Start signal
Air conditioner switch Air conditioner operation
Knock sensor Engine knocking condition
Battery Battery voltage
Absolute pressure sensor Ambient air barometric pressure
Power steering oil pressure switch Power steering operation
Heated oxygen sensor 2* Density of oxygen in exhaust gas
*: Under normal conditions, this sensor is not for engine control operation.
Basic Multiport Fuel Injection System
Throttle position
Throttle valve idle position
Fuel injection & mixture ratio
control
Injectors
NAEC0014S02
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air
flow sensor.
Various Fuel Injection Increase/Decrease Compensation
NAEC0014S03
In addition, the amount of fuel injected is compensated to improve engine performance under various operating conditions as listed below.
<Fuel increase>
I During warm-up
I When starting the engine
I During acceleration
I Hot-engine operation
I When selector lever is changed from “N” to “D”
I High-load, high-speed operation
<Fuel decrease>
I During deceleration
I During high engine speed operation
EC-30
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