Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Frontier 1998-2002 Approved Nissan Frontier 2002 EC
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ENGINE CONTROL SYSTEM GI
SECTION EC MA
EM
LC
CONTENTS FE
KA24DE Idle Speed/Ignition Timing/Idle Mixture Ratio
CL
Adjustment .................................................................59
TROUBLE DIAGNOSIS - INDEX ..................................18
ON BOARD DIAGNOSTIC SYSTEM MT
Alphabetical & P No. Index for DTC .........................18
DESCRIPTION ...............................................................73
PRECAUTIONS .............................................................23
Introduction ................................................................73
Supplemental Restraint System (SRS) AIR
Two Trip Detection Logic ...........................................73 AT
BAG and SEAT BELT PRE-TENSIONER.............23
Emission-related Diagnostic Information ...................74
Precautions for On Board Diagnostic (OBD)
Malfunction Indicator Lamp (MIL)..............................88
System of Engine and A/T.........................................23
OBD System Operation Chart ...................................89
TF
Engine Fuel & Emission Control System ..................24
CONSULT-II ...............................................................94
Precautions ................................................................25
Generic Scan Tool (GST) ........................................105 PD
Wiring Diagrams and Trouble Diagnosis...................26
TROUBLE DIAGNOSIS - INTRODUCTION................107
PREPARATION .............................................................27
Introduction ..............................................................107
Special Service Tools ................................................27
Commercial Service Tools .........................................27
Work Flow................................................................109 AX
TROUBLE DIAGNOSIS - BASIC INSPECTION ......... 111
ENGINE AND EMISSION CONTROL OVERALL
Basic Inspection....................................................... 111
SYSTEM.........................................................................29 SU
TROUBLE DIAGNOSIS - GENERAL
Engine Control Component Parts Location...............29
DESCRIPTION .............................................................125
Circuit Diagram ..........................................................31
DTC Inspection Priority Chart..................................125
System Diagram ........................................................32 BR
Fail-safe Chart .........................................................126
Vacuum Hose Drawing ..............................................33
Symptom Matrix Chart.............................................127
System Chart .............................................................34
ENGINE AND EMISSION BASIC CONTROL
CONSULT-II Reference Value in Data Monitor ST
Mode ........................................................................131
SYSTEM DESCRIPTION ...............................................35
Major Sensor Reference Graph in Data Monitor
Multiport Fuel Injection (MFI) System .......................35 RS
Mode ........................................................................133
Distributor Ignition (DI) System .................................37
ECM Terminals and Reference Value .....................136
Air Conditioning Cut Control......................................39
TROUBLE DIAGNOSIS - SPECIFICATION
Fuel Cut Control (at no load & high engine
VALUE..........................................................................145
BT
speed) ........................................................................39
Description ...............................................................145
Evaporative Emission System ...................................40
Testing Condition .....................................................145 HA
On Board Refueling Vapor Recovery (ORVR) ..........45
Inspection Procedure...............................................145
Positive Crankcase Ventilation ..................................55
Diagnostic Procedure ..............................................146
BASIC SERVICE PROCEDURE ...................................57
TROUBLE DIAGNOSIS FOR INTERMITTENT SC
Fuel Pressure Release ..............................................57
INCIDENT.....................................................................149
Fuel Pressure Check .................................................57
Description ...............................................................149
Fuel Pressure Regulator Check ................................58
Diagnostic Procedure ..............................................149 EL
Injector .......................................................................58
TROUBLE DIAGNOSIS FOR POWER SUPPLY........150
Fast Idle Cam (FIC)...................................................59
Main Power Supply and Ground Circuit..................150 IDX
DTC P0031, P0032 HO2S1 HEATER .........................157
CONTENTS (Cont'd)
Description ...............................................................157 On Board Diagnosis Logic.......................................190
CONSULT-II Reference Value in Data Monitor DTC Confirmation Procedure ..................................191
Mode ........................................................................157 Wiring Diagram ........................................................194
ECM Terminals and Reference Value .....................157 Diagnostic Procedure ..............................................195
On Board Diagnosis Logic.......................................157 DTC P0125 ECT SENSOR..........................................203
DTC Confirmation Procedure ..................................158 Component Description ...........................................203
Wiring Diagram ........................................................159 On Board Diagnosis Logic.......................................203
Diagnostic Procedure ..............................................160 DTC Confirmation Procedure ..................................203
DTC P0037, P0038 HO2S2 HEATER .........................162 Wiring Diagram ........................................................205
Description ...............................................................162 Diagnostic Procedure ..............................................206
CONSULT-II Reference Value in Data Monitor DTC P0128 THERMOSTAT FUNCTION.....................208
Mode ........................................................................162 On Board Diagnosis Logic.......................................208
ECM Terminals and Reference Value .....................162 Possible Cause........................................................208
On Board Diagnosis Logic.......................................162 DTC Confirmation Procedure ..................................208
DTC Confirmation Procedure ..................................163 Diagnostic Procedure ..............................................209
Wiring Diagram ........................................................164 DTC P0132 HO2S1......................................................210
Diagnostic Procedure ..............................................165 Component Description ...........................................210
DTC P0101, P0102, P0103 MAF SENSOR ................167 CONSULT-II Reference Value in Data Monitor
Component Description ...........................................167 Mode ........................................................................210
CONSULT-II Reference Value in Data Monitor ECM Terminals and Reference Value .....................210
Mode ........................................................................167 On Board Diagnosis Logic.......................................211
ECM Terminals and Reference Value .....................167 DTC Confirmation Procedure ..................................211
On Board Diagnosis Logic.......................................167 Wiring Diagram ........................................................212
DTC Confirmation Procedure ..................................168 Diagnostic Procedure ..............................................213
Overall Function Check ...........................................170 DTC P0133 HO2S1......................................................217
Wiring Diagram ........................................................171 Component Description ...........................................217
Diagnostic Procedure ..............................................172 CONSULT-II Reference Value in Data Monitor
DTC P0107, P0108 ABSOLUTE PRESSURE Mode ........................................................................217
SENSOR ......................................................................177 ECM Terminals and Reference Value .....................217
Component Description ...........................................177 On Board Diagnosis Logic.......................................218
On Board Diagnosis Logic.......................................177 DTC Confirmation Procedure ..................................218
DTC Confirmation Procedure ..................................177 Overall Function Check ...........................................219
Diagnostic Procedure ..............................................178 Wiring Diagram ........................................................220
DTC P0112, P0113, P0127 IAT SENSOR...................179 Diagnostic Procedure ..............................................221
Component Description ...........................................179 DTC P0134 HO2S1......................................................228
On Board Diagnosis Logic.......................................179 Component Description ...........................................228
DTC Confirmation Procedure ..................................180 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................181 Mode ........................................................................228
Diagnostic Procedure ..............................................182 ECM Terminals and Reference Value .....................228
DTC P0117, P0118 ECT SENSOR..............................184 On Board Diagnosis Logic.......................................229
Component Description ...........................................184 DTC Confirmation Procedure ..................................230
CONSULT-II Reference Value in Data Monitor Overall Function Check ...........................................231
Mode ........................................................................184 Wiring Diagram ........................................................232
On Board Diagnosis Logic.......................................184 Diagnostic Procedure ..............................................233
DTC Confirmation Procedure ..................................185 DTC P0138 HO2S2......................................................236
Wiring Diagram ........................................................186 Component Description ...........................................236
Diagnostic Procedure ..............................................187 CONSULT-II Reference Value in Data Monitor
DTC P0121, P0122, P0123 TP SENSOR ...................189 Mode ........................................................................236
Component Description ...........................................189 ECM Terminals and Reference Value .....................236
CONSULT-II Reference Value in Data Monitor On Board Diagnosis Logic.......................................236
Mode ........................................................................189 DTC Confirmation Procedure ..................................237
ECM Terminals and Reference Value .....................190 Overall Function Check ...........................................237
EC-2
CONTENTS (Cont'd)
Wiring Diagram ........................................................238 On Board Diagnosis Logic.......................................293 GI
Diagnostic Procedure ..............................................239 DTC Confirmation Procedure ..................................294
DTC P0139 HO2S2......................................................244 Wiring Diagram ........................................................295
Component Description ...........................................244 Diagnostic Procedure ..............................................296 MA
CONSULT-II Reference Value in Data Monitor DTC P0340 CMP SENSOR .........................................299
Mode ........................................................................244 Component Description ...........................................299
ECM Terminals and Reference Value .....................244 ECM Terminals and Reference Value .....................299
EM
On Board Diagnosis Logic.......................................244 On Board Diagnosis Logic.......................................300
DTC Confirmation Procedure ..................................245 DTC Confirmation Procedure ..................................301 LC
Overall Function Check ...........................................246 Wiring Diagram ........................................................302
Wiring Diagram ........................................................247 Diagnostic Procedure ..............................................303
Diagnostic Procedure ..............................................248 DTC P0400 EGR FUNCTION......................................307
DTC P0171 FUEL INJECTION SYSTEM Description ...............................................................307
FUNCTION ...................................................................254 On Board Diagnosis Logic.......................................308
On Board Diagnosis Logic.......................................254 DTC Confirmation Procedure ..................................309 FE
DTC Confirmation Procedure ..................................254 Overall Function Check ...........................................310
Wiring Diagram ........................................................256 Wiring Diagram ........................................................311 CL
Diagnostic Procedure ..............................................257 Diagnostic Procedure ..............................................312
DTC P0172 FUEL INJECTION SYSTEM DTC P0402 EGRC-BPT VALVE FUNCTION..............319
FUNCTION ...................................................................261 Description ...............................................................319 MT
On Board Diagnosis Logic.......................................261 On Board Diagnosis Logic.......................................319
DTC Confirmation Procedure ..................................261 DTC Confirmation Procedure ..................................320
Wiring Diagram ........................................................263 Overall Function Check ...........................................321 AT
Diagnostic Procedure ..............................................264 Diagnostic Procedure ..............................................322
DTC P0181, P0182, P0183 FTT SENSOR .................268 DTC P0405, P0406 EGRT SENSOR ..........................327
TF
Component Description ...........................................268 Component Description ...........................................327
On Board Diagnosis Logic.......................................268 On Board Diagnosis Logic.......................................327
DTC Confirmation Procedure ..................................269 DTC Confirmation Procedure ..................................328 PD
Wiring Diagram ........................................................270 Overall Function Check ...........................................329
Diagnostic Procedure ..............................................271 Wiring Diagram ........................................................330
DTC P0217 COOLANT OVERTEMPERATURE Diagnostic Procedure ..............................................331 AX
ENRICHMENT PROTECTION.....................................274 DTC P0420 THREE WAY CATALYST FUNCTION ...334
On Board Diagnosis Logic.......................................274 On Board Diagnosis Logic.......................................334
Possible Cause........................................................274 DTC Confirmation Procedure ..................................334
SU
Overall Function Check ...........................................274 Overall Function Check ...........................................335
Diagnostic Procedure ..............................................276 Diagnostic Procedure ..............................................336 BR
Main 11 Causes of Overheating..............................279 DTC P0441 EVAP CONTROL SYSTEM PURGE
DTC P0300 - P0304 NO. 4 - 1 CYLINDER FLOW MONITORING ..................................................339
MISFIRE, MULTIPLE CYLINDER MISFIRE ...............280 System Description..................................................339 ST
On Board Diagnosis Logic.......................................280 On Board Diagnosis Logic.......................................339
DTC Confirmation Procedure ..................................280 DTC Confirmation Procedure ..................................340
Diagnostic Procedure ..............................................281 Overall Function Check ...........................................340 RS
DTC P0327, P0328 KS................................................289 Diagnostic Procedure ..............................................341
Component Description ...........................................289 DTC P0442 EVAP CONTROL SYSTEM.....................350
BT
ECM Terminals and Reference Value .....................289 On Board Diagnosis Logic.......................................350
On Board Diagnosis Logic.......................................289 DTC Confirmation Procedure ..................................351
DTC Confirmation Procedure ..................................289 Diagnostic Procedure ..............................................353 HA
Wiring Diagram ........................................................290 DTC P0444, P0445 EVAP CANISTER PURGE
Diagnostic Procedure ..............................................291 VOLUME CONTROL SOLENOID VALVE ..................366
DTC P0335 CKP SENSOR (OBD)..............................293 Description ...............................................................366 SC
Component Description ...........................................293 CONSULT-II Reference Value in Data Monitor
ECM Terminals and Reference Value .....................293 Mode ........................................................................366
EL
IDX
EC-3
CONTENTS (Cont'd)
ECM Terminals and Reference Value .....................367 Diagnostic Procedure ..............................................428
On Board Diagnosis Logic.......................................367 DTC P0500 VSS ..........................................................430
DTC Confirmation Procedure ..................................368 Component Description ...........................................430
Wiring Diagram ........................................................369 ECM Terminals and Reference Value .....................430
Diagnostic Procedure ..............................................370 On Board Diagnosis Logic.......................................430
DTC P0447 EVAP CANISTER VENT CONTROL DTC Confirmation Procedure ..................................430
VALVE..........................................................................373 Overall Function Check ...........................................431
Component Description ...........................................373 Wiring Diagram ........................................................432
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................433
Mode ........................................................................373 DTC P0505 ISC SYSTEM ...........................................434
ECM Terminals and Reference Value .....................373 Description ...............................................................434
On Board Diagnosis Logic.......................................373 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ..................................374 Mode ........................................................................435
Wiring Diagram ........................................................375 ECM Terminals and Reference Value .....................435
Diagnostic Procedure ..............................................376 On Board Diagnosis Logic.......................................435
DTC P0452, P0453 EVAP CONTROL SYSTEM DTC Confirmation Procedure ..................................436
PRESSURE SENSOR .................................................380 Wiring Diagram ........................................................437
Component Description ...........................................380 Diagnostic Procedure ..............................................438
CONSULT-II Reference Value in Data Monitor DTC P0510 CTP SWITCH...........................................440
Mode ........................................................................380 Component Description ...........................................440
ECM Terminals and Reference Value .....................380 ECM Terminals and Reference Value .....................440
On Board Diagnosis Logic.......................................381 On Board Diagnosis Logic.......................................440
DTC Confirmation Procedure ..................................382 DTC Confirmation Procedure ..................................441
Wiring Diagram ........................................................383 Overall Function Check ...........................................441
Diagnostic Procedure ..............................................384 Wiring Diagram ........................................................442
DTC P0455 EVAP CONTROL SYSTEM.....................393 Diagnostic Procedure ..............................................443
On Board Diagnosis Logic.......................................393 DTC P0605 ECM .........................................................447
DTC Confirmation Procedure ..................................394 Component Description ...........................................447
Diagnostic Procedure ..............................................395 On Board Diagnosis Logic.......................................447
DTC P0456, P1456 EVAP CONTROL SYSTEM ........405 DTC Confirmation Procedure ..................................447
On Board Diagnosis Logic.......................................405 Diagnostic Procedure ..............................................448
Possible Cause........................................................405 DTC P1143 HO2S1......................................................449
DTC Confirmation Procedure ..................................406 Component Description ...........................................449
Diagnostic Procedure ..............................................408 CONSULT-II Reference Value in Data Monitor
DTC P0460 FUEL LEVEL SENSOR...........................420 Mode ........................................................................449
Component Description ...........................................420 ECM Terminals and Reference Value .....................449
On Board Diagnostic Logic......................................420 On Board Diagnosis Logic.......................................450
Possible Cause........................................................420 DTC Confirmation Procedure ..................................450
DTC Confirmation Procedure ..................................420 Overall Function Check ...........................................451
Wiring Diagram ........................................................421 Diagnostic Procedure ..............................................451
Diagnostic Procedure ..............................................422 DTC P1144 HO2S1......................................................456
DTC P0461 FUEL LEVEL SENSOR...........................424 Component Description ...........................................456
Component Description ...........................................424 CONSULT-II Reference Value in Data Monitor
On Board Diagnostic Logic......................................424 Mode ........................................................................456
Possible Cause........................................................424 ECM Terminals and Reference Value .....................456
Overall Function Check ...........................................424 On Board Diagnosis Logic.......................................457
DTC P0462, P0463 FUEL LEVEL SENSOR ..............426 DTC Confirmation Procedure ..................................457
Component Description ...........................................426 Overall Function Check ...........................................458
On Board Diagnostic Logic......................................426 Diagnostic Procedure ..............................................458
Possible Cause........................................................426 DTC P1146 HO2S2......................................................463
DTC Confirmation Procedure ..................................426 Component Description ...........................................463
Wiring Diagram ........................................................427
EC-4
CONTENTS (Cont'd)
CONSULT-II Reference Value in Data Monitor DTC P1444 EVAP CANISTER PURGE VOLUME GI
Mode ........................................................................463 CONTROL SOLENOID VALVE...................................511
ECM Terminals and Reference Value .....................463 Description ...............................................................511
On Board Diagnosis Logic.......................................463 CONSULT-II Reference Value in Data Monitor MA
DTC Confirmation Procedure ..................................464 Mode ........................................................................511
Overall Function Check ...........................................465 ECM Terminals and Reference Value .....................512
Wiring Diagram ........................................................466 On Board Diagnosis Logic.......................................512
EM
Diagnostic Procedure ..............................................467 DTC Confirmation Procedure ..................................513
DTC P1147 HO2S2......................................................473 Wiring Diagram ........................................................514 LC
Component Description ...........................................473 Diagnostic Procedure ..............................................515
CONSULT-II Reference Value in Data Monitor DTC P1446 EVAP CANISTER VENT CONTROL
Mode ........................................................................473 VALVE..........................................................................522
ECM Terminals and Reference Value .....................473 Component Description ...........................................522
On Board Diagnosis Logic.......................................473 CONSULT-II Reference Value in Data Monitor
DTC Confirmation Procedure ..................................474 Mode ........................................................................522 FE
Overall Function Check ...........................................475 ECM Terminals and Reference Value .....................522
Wiring Diagram ........................................................476 On Board Diagnosis Logic.......................................522 CL
Diagnostic Procedure ..............................................477 DTC Confirmation Procedure ..................................523
DTC P1148 CLOSED LOOP CONTROL ....................483 Diagnostic Procedure ..............................................524
On Board Diagnosis Logic.......................................483 DTC P1448 EVAP CANISTER VENT CONTROL MT
DTC Confirmation Procedure ..................................483 VALVE..........................................................................528
Overall Function Check ...........................................484 Component Description ...........................................528
Diagnostic Procedure ..............................................484 CONSULT-II Reference Value in Data Monitor AT
DTC P1217 ENGINE OVER TEMPERATURE............485 Mode ........................................................................528
On Board Diagnosis Logic.......................................485 ECM Terminals and Reference Value .....................528
TF
Overall Function Check ...........................................485 On Board Diagnosis Logic.......................................528
Diagnostic Procedure ..............................................486 DTC Confirmation Procedure ..................................529
Main 11 Causes of Overheating..............................489 Overall Function Check ...........................................530 PD
DTC P1336 CKP SENSOR (OBD)..............................490 Diagnostic Procedure ..............................................530
Component Description ...........................................490 DTC P1464 FUEL LEVEL SENSOR...........................535
ECM Terminals and Reference Value .....................490 Component Description ...........................................535 AX
On Board Diagnosis Logic.......................................491 On Board Diagnostic Logic......................................535
DTC Confirmation Procedure ..................................491 Possible Cause........................................................535
Wiring Diagram ........................................................492 DTC Confirmation Procedure ..................................535
SU
Diagnostic Procedure ..............................................493 Wiring Diagram ........................................................536
DTC P1400 EGRC-SOLENOID VALVE ......................496 Diagnostic Procedure ..............................................537 BR
Component Description ...........................................496 DTC P1490 VACUUM CUT VALVE BYPASS
CONSULT-II Reference Value in Data Monitor VALVE..........................................................................538
Mode ........................................................................496 Description ...............................................................538 ST
ECM Terminals and Reference Value .....................496 CONSULT-II Reference Value in Data Monitor
On Board Diagnosis Logic.......................................496 Mode ........................................................................538
DTC Confirmation Procedure ..................................497 ECM Terminals and Reference Value .....................538 RS
Overall Function Check ...........................................497 On Board Diagnosis Logic.......................................539
Wiring Diagram ........................................................498 DTC Confirmation Procedure ..................................539
BT
Diagnostic Procedure ..............................................499 Wiring Diagram ........................................................540
DTC P1402 EGR FUNCTION......................................503 Diagnostic Procedure ..............................................541
Description ...............................................................503 DTC P1491 VACUUM CUT VALVE BYPASS HA
On Board Diagnosis Logic.......................................504 VALVE..........................................................................545
DTC Confirmation Procedure ..................................504 Description ...............................................................545
Wiring Diagram ........................................................506 CONSULT-II Reference Value in Data Monitor SC
Diagnostic Procedure ..............................................507 Mode ........................................................................545
ECM Terminals and Reference Value .....................545
EL
IDX
EC-5
CONTENTS (Cont'd)
On Board Diagnosis Logic.......................................546 System Description..................................................592
DTC Confirmation Procedure ..................................546 Component Description ...........................................592
Overall Function Check ...........................................547 CONSULT-II Reference Value in Data Monitor
Wiring Diagram ........................................................548 Mode ........................................................................592
Diagnostic Procedure ..............................................549 ECM Terminals and Reference Value .....................593
DTC P1706 PNP SWITCH...........................................555 Wiring Diagram ........................................................594
Component Description ...........................................555 Diagnostic Procedure ..............................................595
CONSULT-II Reference Value in Data Monitor POWER STEERING OIL PRESSURE SWITCH.........600
Mode ........................................................................555 Component Description ...........................................600
ECM Terminals and Reference Value .....................555 CONSULT-II Reference Value in Data Monitor
On Board Diagnosis Logic.......................................555 Mode ........................................................................600
DTC Confirmation Procedure ..................................556 ECM Terminals and Reference Value .....................600
Overall Function Check ...........................................557 Wiring Diagram ........................................................601
Wiring Diagram ........................................................558 Diagnostic Procedure ..............................................602
Diagnostic Procedure For M/T Models....................559 IACV-FICD SOLENOID VALVE...................................604
Diagnostic Procedure For A/T Models ....................561 Component Description ...........................................604
DTC P1775 TCC SOLENOID VALVE .........................564 ECM Terminals and Reference Value .....................604
System Description..................................................564 Wiring Diagram ........................................................605
CONSULT-II Reference Value in Data Monitor Diagnostic Procedure ..............................................606
Mode ........................................................................564 MIL & DATA LINK CONNECTORS ............................610
ECM Terminals and Reference Value .....................564 Wiring Diagram ........................................................610
On Board Diagnosis Logic.......................................565 SERVICE DATA AND SPECIFICATIONS (SDS) .......611
DTC Confirmation Procedure ..................................565 Fuel Pressure Regulator..........................................611
Wiring Diagram ........................................................566 Idle Speed and Ignition Timing................................611
Diagnostic Procedure ..............................................567 Ignition Coil ..............................................................611
DTC P1776 TCC SOLENOID VALVE .........................570 Mass Air Flow Sensor..............................................611
System Description..................................................570 Engine Coolant Temperature Sensor ......................611
CONSULT-II Reference Value in Data Monitor EGR Temperature Sensor .......................................611
Mode ........................................................................570 Fuel Pump ...............................................................611
ECM Terminals and Reference Value .....................571 IACV-AAC Valve ......................................................611
On Board Diagnosis Logic.......................................571 Injector .....................................................................612
DTC Confirmation Procedure ..................................571 Resistor....................................................................612
Diagnostic Procedure ..............................................572 Throttle Position Sensor ..........................................612
IGNITION SIGNAL.......................................................574 Heated Oxygen Sensor 1 Heater (Front) ................612
Component Description ...........................................574 Calculated Load Value.............................................612
CONSULT-II Reference Value in Data Monitor Intake Air Temperature Sensor................................612
Mode ........................................................................574 Heated Oxygen Sensor 2 Heater (Rear).................612
ECM Terminals and Reference Value .....................575 Crankshaft Position Sensor (OBD)..........................612
Wiring Diagram ........................................................576 Fuel Tank Temperature Sensor ...............................612
Diagnostic Procedure ..............................................577
INJECTOR ...................................................................583 VG33E
Component Description ...........................................583
ECM Terminals and Reference Value .....................583 TROUBLE DIAGNOSIS - INDEX ................................613
Wiring Diagram ........................................................584 Alphabetical & P No. Index for DTC .......................613
Diagnostic Procedure ..............................................585 PRECAUTIONS ...........................................................621
START SIGNAL...........................................................588 Supplemental Restraint System (SRS) AIR
CONSULT-II Reference Value in Data Monitor BAG and SEAT BELT PRE-TENSIONER...........621
Mode ........................................................................588 Precautions for On Board Diagnostic (OBD)
ECM Terminals and Reference Value .....................588 System of Engine and A/T.......................................621
Wiring Diagram ........................................................589 Engine Fuel & Emission Control System ................622
Diagnostic Procedure ..............................................590 Precautions ..............................................................623
FUEL PUMP.................................................................592 Wiring Diagrams and Trouble Diagnosis.................624
PREPARATION ...........................................................625
EC-6
CONTENTS (Cont'd)
Special Service Tools ..............................................625 TROUBLE DIAGNOSIS - SPECIFICATION GI
Commercial Service Tools .......................................625 VALUE..........................................................................746
ENGINE AND EMISSION CONTROL OVERALL Description ...............................................................746
SYSTEM.......................................................................628 Testing Condition .....................................................746 MA
Engine Control Component Parts Location.............628 Inspection Procedure...............................................746
Circuit Diagram ........................................................630 Diagnostic Procedure ..............................................747
System Diagram ......................................................631 TROUBLE DIAGNOSIS FOR INTERMITTENT
EM
Vacuum Hose Drawing ............................................632 INCIDENT.....................................................................750
System Chart ...........................................................633 Description ...............................................................750 LC
ENGINE AND EMISSION BASIC CONTROL Diagnostic Procedure ..............................................750
SYSTEM DESCRIPTION .............................................634 TROUBLE DIAGNOSIS FOR POWER SUPPLY........751
Multiport Fuel Injection (MFI) System .....................634 Main Power Supply and Ground Circuit..................751
Distributor Ignition (DI) System ...............................636 DTC P0031, P0032, P0051, P0052 HO2S1
Air Conditioning Cut Control....................................637 HEATER.......................................................................757
Fuel Cut Control (at no load & high engine Description ...............................................................757 FE
speed) ......................................................................638 CONSULT-II Reference Value in Data Monitor
Evaporative Emission System .................................638 Mode ........................................................................757 CL
On Board Refueling Vapor Recovery (ORVR) ........644 ECM Terminals and Reference Value .....................757
Positive Crankcase Ventilation ................................654 On Board Diagnosis Logic.......................................757
BASIC SERVICE PROCEDURE .................................656 DTC Confirmation Procedure ..................................758 MT
Fuel Pressure Release ............................................656 Wiring Diagram ........................................................759
Fuel Pressure Check ...............................................656 Diagnostic Procedure ..............................................761
Fuel Pressure Regulator Check ..............................657 DTC P0037, P0038, P0057, P0058 HO2S2 AT
Injector .....................................................................657 HEATER.......................................................................764
Fast Idle Cam (FIC).................................................659 Description ...............................................................764
TF
Idle Speed/Ignition Timing/Idle Mixture Ratio CONSULT-II Reference Value in Data Monitor
Adjustment ...............................................................660 Mode ........................................................................764
ON BOARD DIAGNOSTIC SYSTEM ECM Terminals and Reference Value .....................764 PD
DESCRIPTION .............................................................672 On Board Diagnosis Logic.......................................765
Introduction ..............................................................672 DTC Confirmation Procedure ..................................765
Two Trip Detection Logic .........................................672 Wiring Diagram ........................................................766 AX
Emission-related Diagnostic Information .................673 Diagnostic Procedure ..............................................768
Malfunction Indicator Lamp (MIL)............................687 DTC P0101, P0102, P0103 MAF SENSOR ................772
OBD System Operation Chart .................................688 Component Description ...........................................772
SU
CONSULT-II .............................................................694 CONSULT-II Reference Value in Data Monitor
Generic Scan Tool (GST) ........................................706 Mode ........................................................................772 BR
TROUBLE DIAGNOSIS - INTRODUCTION................708 ECM Terminals and Reference Value .....................772
Introduction ..............................................................708 On Board Diagnosis Logic.......................................772
Work Flow................................................................710 DTC Confirmation Procedure ..................................773 ST
TROUBLE DIAGNOSIS - BASIC INSPECTION .........712 Overall Function Check ...........................................775
Basic Inspection.......................................................712 Wiring Diagram ........................................................776
TROUBLE DIAGNOSIS - GENERAL Diagnostic Procedure ..............................................777 RS
DESCRIPTION .............................................................726 DTC P0112, P0113, P0127 IAT SENSOR...................781
DTC Inspection Priority Chart..................................726 Component Description ...........................................781
BT
Fail-safe Chart .........................................................727 On Board Diagnosis Logic.......................................781
Symptom Matrix Chart.............................................728 DTC Confirmation Procedure ..................................781
CONSULT-II Reference Value in Data Monitor Wiring Diagram ........................................................783 HA
Mode ........................................................................732 Diagnostic Procedure ..............................................784
Major Sensor Reference Graph in Data Monitor DTC P0117, P0118 ECT SENSOR..............................786
Mode ........................................................................734 Component Description ...........................................786 SC
ECM Terminals and Reference Value .....................737 On Board Diagnosis Logic.......................................786
DTC Confirmation Procedure ..................................787
EL
IDX
EC-7
CONTENTS (Cont'd)
Wiring Diagram ........................................................788 CONSULT-II Reference Value in Data Monitor
Diagnostic Procedure ..............................................789 Mode ........................................................................844
DTC P0121, P0122, P0123 TP SENSOR ...................791 ECM Terminals and Reference Value .....................844
Description ...............................................................791 On Board Diagnosis Logic.......................................844
CONSULT-II Reference Value in Data Monitor DTC Confirmation Procedure ..................................845
Mode ........................................................................791 Overall Function Check ...........................................845
ECM Terminals and Reference Value .....................792 Wiring Diagram ........................................................847
On Board Diagnosis Logic.......................................792 Diagnostic Procedure ..............................................849
DTC Confirmation Procedure ..................................793 DTC P0139, P0159 HO2S2 .........................................854
Wiring Diagram ........................................................796 Component Description ...........................................854
Diagnostic Procedure ..............................................797 CONSULT-II Reference Value in Data Monitor
DTC P0125 ECT SENSOR..........................................804 Mode ........................................................................854
Description ...............................................................804 ECM Terminals and Reference Value .....................854
On Board Diagnosis Logic.......................................804 On Board Diagnosis Logic.......................................854
DTC Confirmation Procedure ..................................805 DTC Confirmation Procedure ..................................855
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