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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 ......................................................23
                                                                                         OBD System Operation Chart ...................................88
                                                                                                                                                                            TF
  Engine Fuel & Emission Control System ..................24
                                                                                         CONSULT-II ...............................................................94
  Precautions ................................................................25
                                                                                         Generic Scan Tool (GST) ........................................106                PD
  Wiring Diagrams and Trouble Diagnosis...................26
                                                                                       TROUBLE DIAGNOSIS - INTRODUCTION................108
PREPARATION .............................................................27
                                                                                         Introduction ..............................................................108
  Special Service Tools ................................................27
  Commercial Service Tools .........................................27
                                                                                         Work Flow................................................................110       AX
                                                                                       TROUBLE DIAGNOSIS - BASIC INSPECTION .........112
ENGINE AND EMISSION CONTROL OVERALL
                                                                                         Basic Inspection.......................................................112
SYSTEM.........................................................................29                                                                                           SU
                                                                                       TROUBLE DIAGNOSIS - GENERAL
  Engine Control Component Parts Location...............29
                                                                                       DESCRIPTION .............................................................126
  Circuit Diagram ..........................................................31
                                                                                         DTC Inspection Priority Chart..................................126
  System Diagram ........................................................32                                                                                                 BR
                                                                                         Fail-safe Chart .........................................................127
  Vacuum Hose Drawing ..............................................33
                                                                                         Symptom Matrix Chart.............................................128
  System Chart .............................................................34
ENGINE AND EMISSION BASIC CONTROL
                                                                                         CONSULT-II Reference Value in Data Monitor                                         ST
                                                                                         Mode ........................................................................132
SYSTEM DESCRIPTION ...............................................35
                                                                                         Major Sensor Reference Graph in Data Monitor
  Multiport Fuel Injection (MFI) System .......................35                                                                                                           RS
                                                                                         Mode ........................................................................134
  Distributor Ignition (DI) System .................................37
                                                                                         ECM Terminals and Reference Value .....................137
  Air Conditioning Cut Control......................................39
                                                                                       TROUBLE DIAGNOSIS - SPECIFICATION
  Fuel Cut Control (at no load & high engine
                                                                                       VALUE..........................................................................146
                                                                                                                                                                            BT
  speed) ........................................................................39
                                                                                         Description ...............................................................146
  Evaporative Emission System ...................................40
                                                                                         Testing Condition .....................................................146         HA
  On Board Refueling Vapor Recovery (ORVR) ..........45
                                                                                         Inspection Procedure...............................................146
  Positive Crankcase Ventilation ..................................55
                                                                                         Diagnostic Procedure ..............................................147
BASIC SERVICE PROCEDURE ...................................57
                                                                                       TROUBLE DIAGNOSIS FOR INTERMITTENT                                                   SC
  Fuel Pressure Release ..............................................57
                                                                                       INCIDENT.....................................................................150
  Fuel Pressure Check .................................................57
                                                                                         Description ...............................................................150
  Fuel Pressure Regulator Check ................................58
                                                                                         Diagnostic Procedure ..............................................150             EL
  Injector .......................................................................58
                                                                                       TROUBLE DIAGNOSIS FOR POWER SUPPLY........151
  Fast Idle Cam (FIC)...................................................59
                                                                                         Main Power Supply and Ground Circuit..................151                          IDX
                                                                                       DTC P0031, P0032 HO2S1 HEATER .........................158
                                                     CONTENTS                                  (Cont'd)
  Description ...............................................................158       On Board Diagnosis Logic.......................................191
  CONSULT-II Reference Value in Data Monitor                                           DTC Confirmation Procedure ..................................192
  Mode ........................................................................158     Wiring Diagram ........................................................195
  ECM Terminals and Reference Value .....................158                           Diagnostic Procedure ..............................................196
  On Board Diagnosis Logic.......................................158                 DTC P0125 ECT SENSOR..........................................204
  DTC Confirmation Procedure ..................................159                     Component Description ...........................................204
  Wiring Diagram ........................................................160           On Board Diagnosis Logic.......................................204
  Diagnostic Procedure ..............................................161               DTC Confirmation Procedure ..................................204
DTC P0037, P0038 HO2S2 HEATER .........................163                             Wiring Diagram ........................................................206
  Description ...............................................................163       Diagnostic Procedure ..............................................207
  CONSULT-II Reference Value in Data Monitor                                         DTC P0128 THERMOSTAT FUNCTION.....................209
  Mode ........................................................................163     On Board Diagnosis Logic.......................................209
  ECM Terminals and Reference Value .....................163                           Possible Cause........................................................209
  On Board Diagnosis Logic.......................................163                   DTC Confirmation Procedure ..................................209
  DTC Confirmation Procedure ..................................164                     Diagnostic Procedure ..............................................210
  Wiring Diagram ........................................................165         DTC P0132 HO2S1......................................................211
  Diagnostic Procedure ..............................................166               Component Description ...........................................211
DTC P0101, P0102, P0103 MAF SENSOR ................168                                 CONSULT-II Reference Value in Data Monitor
  Component Description ...........................................168                 Mode ........................................................................211
  CONSULT-II Reference Value in Data Monitor                                           ECM Terminals and Reference Value .....................211
  Mode ........................................................................168     On Board Diagnosis Logic.......................................212
  ECM Terminals and Reference Value .....................168                           DTC Confirmation Procedure ..................................212
  On Board Diagnosis Logic.......................................168                   Wiring Diagram ........................................................213
  DTC Confirmation Procedure ..................................169                     Diagnostic Procedure ..............................................214
  Overall Function Check ...........................................171              DTC P0133 HO2S1......................................................218
  Wiring Diagram ........................................................172           Component Description ...........................................218
  Diagnostic Procedure ..............................................173               CONSULT-II Reference Value in Data Monitor
DTC P0107, P0108 ABSOLUTE PRESSURE                                                     Mode ........................................................................218
SENSOR ......................................................................178       ECM Terminals and Reference Value .....................218
  Component Description ...........................................178                 On Board Diagnosis Logic.......................................219
  On Board Diagnosis Logic.......................................178                   DTC Confirmation Procedure ..................................219
  DTC Confirmation Procedure ..................................178                     Overall Function Check ...........................................220
  Diagnostic Procedure ..............................................179               Wiring Diagram ........................................................221
DTC P0112, P0113, P0127 IAT SENSOR...................180                               Diagnostic Procedure ..............................................222
  Component Description ...........................................180               DTC P0134 HO2S1......................................................229
  On Board Diagnosis Logic.......................................180                   Component Description ...........................................229
  DTC Confirmation Procedure ..................................181                     CONSULT-II Reference Value in Data Monitor
  Wiring Diagram ........................................................182           Mode ........................................................................229
  Diagnostic Procedure ..............................................183               ECM Terminals and Reference Value .....................229
DTC P0117, P0118 ECT SENSOR..............................185                           On Board Diagnosis Logic.......................................230
  Component Description ...........................................185                 DTC Confirmation Procedure ..................................231
  CONSULT-II Reference Value in Data Monitor                                           Overall Function Check ...........................................232
  Mode ........................................................................185     Wiring Diagram ........................................................233
  On Board Diagnosis Logic.......................................185                   Diagnostic Procedure ..............................................234
  DTC Confirmation Procedure ..................................186                   DTC P0138 HO2S2......................................................237
  Wiring Diagram ........................................................187           Component Description ...........................................237
  Diagnostic Procedure ..............................................188               CONSULT-II Reference Value in Data Monitor
DTC P0121, P0122, P0123 TP SENSOR ...................190                               Mode ........................................................................237
  Component Description ...........................................190                 ECM Terminals and Reference Value .....................237
  CONSULT-II Reference Value in Data Monitor                                           On Board Diagnosis Logic.......................................237
  Mode ........................................................................190     DTC Confirmation Procedure ..................................238
  ECM Terminals and Reference Value .....................191                           Overall Function Check ...........................................238




                                                                                EC-2
                                                     CONTENTS                                  (Cont'd)
  Wiring Diagram ........................................................239           DTC Confirmation Procedure ..................................295                   GI
  Diagnostic Procedure ..............................................240               Wiring Diagram ........................................................296
DTC P0139 HO2S2......................................................245               Diagnostic Procedure ..............................................297
  Component Description ...........................................245               DTC P0340 CMP SENSOR .........................................300                    MA
  CONSULT-II Reference Value in Data Monitor                                           Component Description ...........................................300
  Mode ........................................................................245     ECM Terminals and Reference Value .....................300
  ECM Terminals and Reference Value .....................245                           On Board Diagnosis Logic.......................................301
                                                                                                                                                                          EM
  On Board Diagnosis Logic.......................................245                   DTC Confirmation Procedure ..................................302
  DTC Confirmation Procedure ..................................246                     Wiring Diagram ........................................................303         LC
  Overall Function Check ...........................................247                Diagnostic Procedure ..............................................304
  Wiring Diagram ........................................................248         DTC P0400 EGR FUNCTION......................................308
  Diagnostic Procedure ..............................................249               Description ...............................................................308
DTC P0171 FUEL INJECTION SYSTEM                                                        On Board Diagnosis Logic.......................................309
FUNCTION ...................................................................255        DTC Confirmation Procedure ..................................310
  On Board Diagnosis Logic.......................................255                   Overall Function Check ...........................................311              FE
  DTC Confirmation Procedure ..................................255                     Wiring Diagram ........................................................312
  Wiring Diagram ........................................................257           Diagnostic Procedure ..............................................313             CL
  Diagnostic Procedure ..............................................258             DTC P0402 EGRC-BPT VALVE FUNCTION..............320
DTC P0172 FUEL INJECTION SYSTEM                                                        Description ...............................................................320
FUNCTION ...................................................................262        On Board Diagnosis Logic.......................................320                 MT
  On Board Diagnosis Logic.......................................262                   DTC Confirmation Procedure ..................................321
  DTC Confirmation Procedure ..................................262                     Overall Function Check ...........................................322
  Wiring Diagram ........................................................264           Diagnostic Procedure ..............................................323             AT
  Diagnostic Procedure ..............................................265             DTC P0405, P0406 EGRT SENSOR ..........................328
DTC P0181, P0182, P0183 FTT SENSOR .................269                                Component Description ...........................................328
                                                                                                                                                                          TF
  Component Description ...........................................269                 On Board Diagnosis Logic.......................................328
  On Board Diagnosis Logic.......................................269                   DTC Confirmation Procedure ..................................329
  DTC Confirmation Procedure ..................................270                     Overall Function Check ...........................................330              PD
  Wiring Diagram ........................................................271           Wiring Diagram ........................................................331
  Diagnostic Procedure ..............................................272               Diagnostic Procedure ..............................................332
DTC P0217 COOLANT OVERTEMPERATURE                                                    DTC P0420 THREE WAY CATALYST FUNCTION ...334                                         AX
ENRICHMENT PROTECTION.....................................275                          On Board Diagnosis Logic.......................................334
  On Board Diagnosis Logic.......................................275                   DTC Confirmation Procedure ..................................334
  Overall Function Check ...........................................275                Overall Function Check ...........................................335
                                                                                                                                                                          SU
  Diagnostic Procedure ..............................................277               Diagnostic Procedure ..............................................336
  Main 11 Causes of Overheating..............................280                     DTC P0441 EVAP CONTROL SYSTEM PURGE                                                  BR
DTC P0300 - P0304 NO. 4 - 1 CYLINDER                                                 FLOW MONITORING ..................................................339
MISFIRE, MULTIPLE CYLINDER MISFIRE ...............281                                  System Description..................................................339
  On Board Diagnosis Logic.......................................281                   On Board Diagnosis Logic.......................................339                 ST
  DTC Confirmation Procedure ..................................281                     DTC Confirmation Procedure ..................................340
  Diagnostic Procedure ..............................................282               Overall Function Check ...........................................340
DTC P0327, P0328 KS................................................290                 Diagnostic Procedure ..............................................341             RS
  Component Description ...........................................290               DTC P0442 EVAP CONTROL SYSTEM.....................350
  ECM Terminals and Reference Value .....................290                           On Board Diagnosis Logic.......................................350
                                                                                                                                                                          BT
  On Board Diagnosis Logic.......................................290                   DTC Confirmation Procedure ..................................351
  DTC Confirmation Procedure ..................................290                     Diagnostic Procedure ..............................................353
  Wiring Diagram ........................................................291         DTC P0444, P0445 EVAP CANISTER PURGE                                                 HA
  Diagnostic Procedure ..............................................292             VOLUME CONTROL SOLENOID VALVE ..................366
DTC P0335 CKP SENSOR (OBD)..............................294                            Description ...............................................................366
  Component Description ...........................................294                 CONSULT-II Reference Value in Data Monitor                                         SC
  ECM Terminals and Reference Value .....................294                           Mode ........................................................................366
  On Board Diagnosis Logic.......................................294                   ECM Terminals and Reference Value .....................367
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-3
                                                     CONTENTS                                  (Cont'd)
  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           CONSULT-II Reference Value in Data Monitor
  Diagnostic Procedure ..............................................428               Mode ........................................................................463




                                                                                EC-4
                                                     CONTENTS                                  (Cont'd)
  ECM Terminals and Reference Value .....................463                           CONSULT-II Reference Value in Data Monitor                                         GI
  On Board Diagnosis Logic.......................................463                   Mode ........................................................................512
  DTC Confirmation Procedure ..................................464                     ECM Terminals and Reference Value .....................513
  Overall Function Check ...........................................465                On Board Diagnosis Logic.......................................513                 MA
  Wiring Diagram ........................................................466           DTC Confirmation Procedure ..................................514
  Diagnostic Procedure ..............................................467               Wiring Diagram ........................................................515
DTC P1147 HO2S2......................................................473               Diagnostic Procedure ..............................................516
                                                                                                                                                                          EM
  Component Description ...........................................473               DTC P1446 EVAP CANISTER VENT CONTROL
  CONSULT-II Reference Value in Data Monitor                                         VALVE..........................................................................523   LC
  Mode ........................................................................473     Component Description ...........................................523
  ECM Terminals and Reference Value .....................473                           CONSULT-II Reference Value in Data Monitor
  On Board Diagnosis Logic.......................................473                   Mode ........................................................................523
  DTC Confirmation Procedure ..................................474                     ECM Terminals and Reference Value .....................523
  Overall Function Check ...........................................475                On Board Diagnosis Logic.......................................523
  Wiring Diagram ........................................................476           DTC Confirmation Procedure ..................................524                   FE
  Diagnostic Procedure ..............................................477               Diagnostic Procedure ..............................................525
DTC P1148 CLOSED LOOP CONTROL ....................483                                DTC P1448 EVAP CANISTER VENT CONTROL                                                 CL
  On Board Diagnosis Logic.......................................483                 VALVE..........................................................................529
  DTC Confirmation Procedure ..................................483                     Component Description ...........................................529
  Overall Function Check ...........................................484                CONSULT-II Reference Value in Data Monitor                                         MT
  Diagnostic Procedure ..............................................484               Mode ........................................................................529
DTC P1217 ENGINE OVER TEMPERATURE............485                                       ECM Terminals and Reference Value .....................529
  On Board Diagnosis Logic.......................................485                   On Board Diagnosis Logic.......................................529                 AT
  Overall Function Check ...........................................485                DTC Confirmation Procedure ..................................530
  Diagnostic Procedure ..............................................486               Overall Function Check ...........................................531
                                                                                                                                                                          TF
  Main 11 Causes of Overheating..............................489                       Diagnostic Procedure ..............................................531
DTC P1336 CKP SENSOR (OBD)..............................490                          DTC P1464 FUEL LEVEL SENSOR...........................536
  Component Description ...........................................490                 Component Description ...........................................536               PD
  ECM Terminals and Reference Value .....................490                           On Board Diagnostic Logic......................................536
  On Board Diagnosis Logic.......................................491                   Possible Cause........................................................536
  DTC Confirmation Procedure ..................................491                     DTC Confirmation Procedure ..................................536                   AX
  Wiring Diagram ........................................................492           Wiring Diagram ........................................................537
  Diagnostic Procedure ..............................................493               Diagnostic Procedure ..............................................538
DTC P1400 EGRC-SOLENOID VALVE ......................496                              DTC P1490 VACUUM CUT VALVE BYPASS
                                                                                                                                                                          SU
  Component Description ...........................................496               VALVE..........................................................................539
  CONSULT-II Reference Value in Data Monitor                                           Description ...............................................................539     BR
  Mode ........................................................................496     CONSULT-II Reference Value in Data Monitor
  ECM Terminals and Reference Value .....................496                           Mode ........................................................................539
  On Board Diagnosis Logic.......................................496                   ECM Terminals and Reference Value .....................539                         ST
  DTC Confirmation Procedure ..................................497                     On Board Diagnosis Logic.......................................540
  Overall Function Check ...........................................497                DTC Confirmation Procedure ..................................540
  Wiring Diagram ........................................................498           Wiring Diagram ........................................................541         RS
  Diagnostic Procedure ..............................................499               Diagnostic Procedure ..............................................542
DTC P1402 EGR FUNCTION......................................503                      DTC P1491 VACUUM CUT VALVE BYPASS
                                                                                                                                                                          BT
  Description ...............................................................503     VALVE..........................................................................546
  On Board Diagnosis Logic.......................................504                   Description ...............................................................546
  DTC Confirmation Procedure ..................................504                     CONSULT-II Reference Value in Data Monitor                                         HA
  Wiring Diagram ........................................................506           Mode ........................................................................546
  Diagnostic Procedure ..............................................507               ECM Terminals and Reference Value .....................546
DTC P1444 EVAP CANISTER PURGE VOLUME                                                   On Board Diagnosis Logic.......................................547                 SC
CONTROL SOLENOID VALVE...................................512                           DTC Confirmation Procedure ..................................547
  Description ...............................................................512       Overall Function Check ...........................................548
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-5
                                                     CONTENTS                                  (Cont'd)
  Wiring Diagram ........................................................549         SERVICE DATA AND SPECIFICATIONS (SDS) .......599
  Diagnostic Procedure ..............................................550               Fuel Pressure Regulator..........................................599
DTC P1706 PNP SWITCH...........................................556                     Idle Speed and Ignition Timing................................599
  Component Description ...........................................556                 Ignition Coil ..............................................................599
  CONSULT-II Reference Value in Data Monitor                                           Mass Air Flow Sensor..............................................599
  Mode ........................................................................556     Engine Coolant Temperature Sensor ......................599
  ECM Terminals and Reference Value .....................556                           EGR Temperature Sensor .......................................599
  On Board Diagnosis Logic.......................................556                   Fuel Pump ...............................................................599
  DTC Confirmation Procedure ..................................557                     IACV-AAC Valve ......................................................599
  Overall Function Check ...........................................558                Injector .....................................................................600
  Wiring Diagram ........................................................559           Resistor....................................................................600
  Diagnostic Procedure For M/T Models....................560                           Throttle Position Sensor ..........................................600
IGNITION SIGNAL.......................................................562              Heated Oxygen Sensor 1 Heater ............................600
  Component Description ...........................................562                 Calculated Load Value.............................................600
  CONSULT-II Reference Value in Data Monitor                                           Intake Air Temperature Sensor................................600
  Mode ........................................................................562     Heated Oxygen Sensor 2 Heater ............................600
  ECM Terminals and Reference Value .....................563                           Crankshaft Position Sensor (OBD)..........................600
  Wiring Diagram ........................................................564           Fuel Tank Temperature Sensor ...............................600
  Diagnostic Procedure ..............................................565
INJECTOR ...................................................................571                                          VG33E
  Component Description ...........................................571
  ECM Terminals and Reference Value .....................571                         TROUBLE DIAGNOSIS - INDEX ................................601
  Wiring Diagram ........................................................572           Alphabetical & P No. Index for DTC .......................601
  Diagnostic Procedure ..............................................573             PRECAUTIONS ...........................................................609
START SIGNAL...........................................................576             Supplemental Restraint System (SRS) AIR
  CONSULT-II Reference Value in Data Monitor                                           BAG and SEAT BELT PRE-TENSIONER...........609
  Mode ........................................................................576     Precautions for On Board Diagnostic (OBD)
  ECM Terminals and Reference Value .....................576                           System of Engine and A/T.......................................609
  Wiring Diagram ........................................................577           Engine Fuel & Emission Control System ................610
  Diagnostic Procedure ..............................................578               Precautions ..............................................................611
FUEL PUMP.................................................................580          Wiring Diagrams and Trouble Diagnosis.................612
  System Description..................................................580            PREPARATION ...........................................................613
  Component Description ...........................................580                 Special Service Tools ..............................................613
  CONSULT-II Reference Value in Data Monitor                                           Commercial Service Tools .......................................613
  Mode ........................................................................580   ENGINE AND EMISSION CONTROL OVERALL
  ECM Terminals and Reference Value .....................581                         SYSTEM.......................................................................616
  Wiring Diagram ........................................................582           Engine Control Component Parts Location.............616
  Diagnostic Procedure ..............................................583               Circuit Diagram ........................................................618
POWER STEERING OIL PRESSURE SWITCH.........588                                         System Diagram ......................................................619
  Component Description ...........................................588                 Vacuum Hose Drawing ............................................620
  CONSULT-II Reference Value in Data Monitor                                           System Chart ...........................................................621
  Mode ........................................................................588   ENGINE AND EMISSION BASIC CONTROL
  ECM Terminals and Reference Value .....................588                         SYSTEM DESCRIPTION .............................................622
  Wiring Diagram ........................................................589           Multiport Fuel Injection (MFI) System .....................622
  Diagnostic Procedure ..............................................590               Distributor Ignition (DI) System ...............................624
IACV-FICD SOLENOID VALVE...................................592                         Air Conditioning Cut Control....................................625
  Component Description ...........................................592                 Fuel Cut Control (at no load & high engine
  ECM Terminals and Reference Value .....................592                           speed) ......................................................................626
  Wiring Diagram ........................................................593           Evaporative Emission System .................................626
  Diagnostic Procedure ..............................................594               On Board Refueling Vapor Recovery (ORVR) ........632
MIL & DATA LINK CONNECTORS ............................598                             Positive Crankcase Ventilation ................................642
  Wiring Diagram ........................................................598         BASIC SERVICE PROCEDURE .................................644
                                                                                       Fuel Pressure Release ............................................644



                                                                                EC-6
                                                     CONTENTS                                   (Cont'd)
  Fuel Pressure Check ...............................................644              DTC P0037, P0038, P0057, P0058 HO2S2                                                 GI
  Fuel Pressure Regulator Check ..............................645                     HEATER.......................................................................753
  Injector .....................................................................645     Description ...............................................................753
  Fast Idle Cam (FIC).................................................646               CONSULT-II Reference Value in Data Monitor                                         MA
  Idle Speed/Ignition Timing/Idle Mixture Ratio                                         Mode ........................................................................753
  Adjustment ...............................................................648         ECM Terminals and Reference Value .....................753
ON BOARD DIAGNOSTIC SYSTEM                                                              On Board Diagnosis Logic.......................................754
                                                                                                                                                                           EM
DESCRIPTION .............................................................660            DTC Confirmation Procedure ..................................754
  Introduction ..............................................................660        Wiring Diagram ........................................................755         LC
  Two Trip Detection Logic .........................................660                 Diagnostic Procedure ..............................................757
  Emission-related Diagnostic Information .................661                        DTC P0101, P0102, P0103 MAF SENSOR ................761
  Malfunction Indicator Lamp (MIL)............................675                       Component Description ...........................................761
  OBD System Operation Chart .................................676                       CONSULT-II Reference Value in Data Monitor
  CONSULT-II .............................................................682           Mode ........................................................................761
  Generic Scan Tool (GST) ........................................695                   ECM Terminals and Reference Value .....................761                         FE
TROUBLE DIAGNOSIS - INTRODUCTION................697                                     On Board Diagnosis Logic.......................................761
  Introduction ..............................................................697        DTC Confirmation Procedure ..................................762                   CL
  Work Flow................................................................699          Overall Function Check ...........................................764
TROUBLE DIAGNOSIS - BASIC INSPECTION .........701                                       Wiring Diagram ........................................................765
  Basic Inspection.......................................................701            Diagnostic Procedure ..............................................766             MT
TROUBLE DIAGNOSIS - GENERAL                                                           DTC P0112, P0113, P0127 IAT SENSOR...................770
DESCRIPTION .............................................................715            Component Description ...........................................770
  DTC Inspection Priority Chart..................................715                    On Board Diagnosis Logic.......................................770                 AT
  Fail-safe Chart .........................................................716          DTC Confirmation Procedure ..................................770
  Symptom Matrix Chart.............................................717                  Wiring Diagram ........................................................772
                                                                                                                                                                           TF
  CONSULT-II Reference Value in Data Monitor                                            Diagnostic Procedure ..............................................773
  Mode ........................................................................721    DTC P0117, P0118 ECT SENSOR..............................775
  Major Sensor Reference Graph in Data Monitor                                          Component Description ...........................................775               PD
  Mode ........................................................................723      On Board Diagnosis Logic.......................................775
  ECM Terminals and Reference Value .....................726                            DTC Confirmation Procedure ..................................776
TROUBLE DIAGNOSIS - SPECIFICATION                                                       Wiring Diagram ........................................................777         AX
VALUE..........................................................................735      Diagnostic Procedure ..............................................778
  Description ...............................................................735      DTC P0121, P0122, P0123 TP SENSOR ...................780
  Testing Condition .....................................................735            Description ...............................................................780
                                                                                                                                                                           SU
  Inspection Procedure...............................................735                CONSULT-II Reference Value in Data Monitor
  Diagnostic Procedure ..............................................736                Mode ........................................................................780   BR
TROUBLE DIAGNOSIS FOR INTERMITTENT                                                      ECM Terminals and Reference Value .....................781
INCIDENT.....................................................................739        On Board Diagnosis Logic.......................................781
  Description ...............................................................739        DTC Confirmation Procedure ..................................782                   ST
  Diagnostic Procedure ..............................................739                Wiring Diagram ........................................................785
TROUBLE DIAGNOSIS FOR POWER SUPPLY........740                                           Diagnostic Procedure ..............................................786
  Main Power Supply and Ground Circuit..................740                           DTC P0125 ECT SENSOR..........................................793                    RS
DTC P0031, P0032, P0051, P0052 HO2S1                                                    Description ...............................................................793
HEATER.......................................................................746        On Board Diagnosis Logic.......................................793
                                                                                                                                                                           BT
  Description ...............................................................746        DTC Confirmation Procedure ..................................794
  CONSULT-II Reference Value in Data Monitor                                            Wiring Diagram ........................................................795
  Mode ........................................................................746      Diagnostic Procedure ..............................................796             HA
  ECM Terminals and Reference Value .....................746                          DTC P0128 THERMOSTAT FUNCTION.....................798
  On Board Diagnosis Logic.......................................746                    On Board Diagnosis Logic.......................................798
  DTC Confirmation Procedure ..................................747                      DTC Confirmation Procedure ..................................798                   SC
  Wiring Diagram ........................................................748            Diagnostic Procedure ..............................................799
  Diagnostic Procedure ..............................................750              DTC P0132, P0152 HO2S1 .........................................800
                                                                                                                                                                           EL

                                                                                                                                                                           IDX
                                                                                 EC-7
                                                     CONTENTS                                  (Cont'd)
  Component Description ...........................................800                 Wiring Diagram ........................................................855
  CONSULT-II Reference Value in Data Monitor                                           Diagnostic Procedure ..............................................857
  Mode ........................................................................800   DTC P0172, P0175 FUEL INJECTION SYSTEM
  ECM Terminals and Reference Value .....................800                         FUNCTION ...................................................................862
  On Board Diagnosis Logic.......................................801                   On Board Diagnosis Logic.......................................862
  DTC Confirmation Procedure ..................................801                     DTC Confirmation Procedure ..................................863
  Wiring Diagram ........................................................802           Wiring Diagram ........................................................864
  Diagnostic Procedure ..............................................804               Diagnostic Procedure ..............................................866
DTC P0133, P0153 HO2S1 .........................................808                  DTC P0181, P0182, P0183 FTT SENSOR .................870
  Component Description ...........................................808                 Component Description ...........................................870
  CONSULT-II Reference Value in Data Monitor                                           On Board Diagnosis Logic.......................................870
  Mode ........................................................................808     DTC Confirmation Procedure ..................................871
  ECM Terminals and Reference Value .....................808                           Wiring Diagram ........................................................872
  On Board Diagnosis Logic.......................................809                



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