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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 .................................................................53
TROUBLE DIAGNOSIS - INDEX ..................................13
                                                                                       ON BOARD DIAGNOSTIC SYSTEM                                                           MT
  Alphabetical & P No. Index for DTC .........................13
                                                                                       DESCRIPTION ...............................................................67
PRECAUTIONS .............................................................17
                                                                                         Introduction ................................................................67
  Supplemental Restraint System (SRS) AIR
                                                                                         Two Trip Detection Logic ...........................................67             AT
  BAG and SEAT BELT PRE-TENSIONER.............17
                                                                                         Emission-related Diagnostic Information ...................68
  Precautions for On Board Diagnostic (OBD)
                                                                                         Malfunction Indicator Lamp (MIL)..............................80
  System of Engine and A/T.........................................17
                                                                                         OBD System Operation Chart ...................................81
                                                                                                                                                                            TF
  Engine Fuel & Emission Control System ..................18
                                                                                         CONSULT-II ...............................................................86
  Precautions ................................................................19
                                                                                         Generic Scan Tool (GST) ..........................................98               PD
  Wiring Diagrams and Trouble Diagnosis...................20
                                                                                       TROUBLE DIAGNOSIS - INTRODUCTION................100
PREPARATION .............................................................21
                                                                                         Introduction ..............................................................100
  Special Service Tools ................................................21
  Commercial Service Tools .........................................21
                                                                                         Work Flow................................................................102       AX
                                                                                       TROUBLE DIAGNOSIS - BASIC INSPECTION .........104
ENGINE AND EMISSION CONTROL OVERALL
                                                                                         Basic Inspection.......................................................104
SYSTEM.........................................................................23                                                                                           SU
                                                                                       TROUBLE DIAGNOSIS - GENERAL
  Engine Control Component Parts Location...............23
                                                                                       DESCRIPTION .............................................................118
  Circuit Diagram ..........................................................25
                                                                                         DTC Inspection Priority Chart..................................118
  System Diagram ........................................................26                                                                                                 BR
                                                                                         Fail-safe Chart .........................................................119
  Vacuum Hose Drawing ..............................................27
                                                                                         Symptom Matrix Chart.............................................120
  System Chart .............................................................28
ENGINE AND EMISSION BASIC CONTROL
                                                                                         CONSULT-II Reference Value in Data Monitor                                         ST
                                                                                         Mode ........................................................................124
SYSTEM DESCRIPTION ...............................................29
                                                                                         Major Sensor Reference Graph in Data Monitor
  Multiport Fuel Injection (MFI) System .......................29                                                                                                           RS
                                                                                         Mode ........................................................................126
  Distributor Ignition (DI) System .................................31
                                                                                         ECM Terminals and Reference Value .....................129
  Air Conditioning Cut Control......................................33
                                                                                       TROUBLE DIAGNOSIS - SPECIFICATION
  Fuel Cut Control (at no load & high engine
                                                                                       VALUE..........................................................................138
                                                                                                                                                                            BT
  speed) ........................................................................33
                                                                                         Description ...............................................................138
  Evaporative Emission System ...................................34
                                                                                         Testing Condition .....................................................138         HA
  On Board Refueling Vapor Recovery (ORVR) ..........39
                                                                                         Inspection Procedure...............................................138
  Positive Crankcase Ventilation ..................................49
                                                                                         Diagnostic Procedure ..............................................139
BASIC SERVICE PROCEDURE ...................................51
                                                                                       TROUBLE DIAGNOSIS FOR INTERMITTENT                                                   SC
  Fuel Pressure Release ..............................................51
                                                                                       INCIDENT.....................................................................142
  Fuel Pressure Check .................................................51
                                                                                         Description ...............................................................142
  Fuel Pressure Regulator Check ................................52
                                                                                         Diagnostic Procedure ..............................................142             EL
  Injector .......................................................................52
                                                                                       TROUBLE DIAGNOSIS FOR POWER SUPPLY........143
  Fast Idle Cam (FIC)...................................................53
                                                                                         Main Power Supply and Ground Circuit..................143                          IDX
                                                                                       DTC P0100 MASS AIR FLOW SENSOR (MAFS)......150
                                                     CONTENTS                                  (Cont'd)
  Component Description ...........................................150                 On Board Diagnosis Logic.......................................193
  CONSULT-II Reference Value in Data Monitor                                           DTC Confirmation Procedure ..................................194
  Mode ........................................................................150     Overall Function Check ...........................................195
  ECM Terminals and Reference Value .....................150                           Wiring Diagram ........................................................196
  On Board Diagnosis Logic.......................................151                   Diagnostic Procedure ..............................................197
  DTC Confirmation Procedure ..................................151                   DTC P0131 HEATED OXYGEN SENSOR 1
  Overall Function Check ...........................................153              (FRONT) ( LEAN SHIFT MONITORING) ....................200
  Wiring Diagram ........................................................154           Component Description ...........................................200
  Diagnostic Procedure ..............................................155               CONSULT-II Reference Value in Data Monitor
DTC P0105 ABSOLUTE PRESSURE SENSOR ........160                                         Mode ........................................................................200
  Component Description ...........................................160                 ECM Terminals and Reference Value .....................200
  On Board Diagnosis Logic.......................................160                   On Board Diagnosis Logic.......................................201
  DTC Confirmation Procedure ..................................160                     DTC Confirmation Procedure ..................................201
  Diagnostic Procedure ..............................................161               Overall Function Check ...........................................202
DTC P0110 INTAKE AIR TEMPERATURE                                                       Diagnostic Procedure ..............................................202
SENSOR ......................................................................162     DTC P0132 HEATED OXYGEN SENSOR 1
  Component Description ...........................................162               (FRONT) (RICH SHIFT MONITORING) ......................207
  On Board Diagnosis Logic.......................................162                   Component Description ...........................................207
  DTC Confirmation Procedure ..................................163                     CONSULT-II Reference Value in Data Monitor
  Wiring Diagram ........................................................164           Mode ........................................................................207
  Diagnostic Procedure ..............................................165               ECM Terminals and Reference Value .....................207
DTC P0115 ENGINE COOLANT                                                               On Board Diagnosis Logic.......................................208
TEMPERATURESENSOR (ECTS) (CIRCUIT)............168                                      DTC Confirmation Procedure ..................................208
  Component Description ...........................................168                 Overall Function Check ...........................................209
  CONSULT-II Reference Value in Data Monitor                                           Diagnostic Procedure ..............................................209
  Mode ........................................................................168   DTC P0133 HEATED OXYGEN SENSOR 1
  On Board Diagnosis Logic.......................................168                 (FRONT) (RESPONSE MONITORING).......................214
  DTC Confirmation Procedure ..................................169                     Component Description ...........................................214
  Wiring Diagram ........................................................170           CONSULT-II Reference Value in Data Monitor
  Diagnostic Procedure ..............................................171               Mode ........................................................................214
DTC P0120 THROTTLE POSITION SENSOR ...........173                                      ECM Terminals and Reference Value .....................214
  Component Description ...........................................173                 On Board Diagnosis Logic.......................................215
  CONSULT-II Reference Value in Data Monitor                                           DTC Confirmation Procedure ..................................215
  Mode ........................................................................173     Overall Function Check ...........................................216
  ECM Terminals and Reference Value .....................174                           Wiring Diagram ........................................................217
  On Board Diagnosis Logic.......................................174                   Diagnostic Procedure ..............................................218
  DTC Confirmation Procedure ..................................175                   DTC P0134 HEATED OXYGEN SENSOR 1
  Wiring Diagram ........................................................178         (FRONT) (HIGH VOLTAGE)........................................225
  Diagnostic Procedure ..............................................179               Component Description ...........................................225
DTC P0125 ENGINE COOLANT TEMPERATURE                                                   CONSULT-II Reference Value in Data Monitor
(ECT) SENSOR............................................................187            Mode ........................................................................225
  Component Description ...........................................187                 ECM Terminals and Reference Value .....................225
  On Board Diagnosis Logic.......................................187                   On Board Diagnosis Logic.......................................226
  DTC Confirmation Procedure ..................................187                     DTC Confirmation Procedure ..................................226
  Wiring Diagram ........................................................189           Wiring Diagram ........................................................227
  Diagnostic Procedure ..............................................190               Diagnostic Procedure ..............................................228
DTC P0130 HEATED OXYGEN SENSOR 1                                                     DTC P0135 HEATED OXYGEN SENSOR 1
(FRONT) (CIRCUIT).....................................................192            HEATER (FRONT).......................................................232
  Component Description ...........................................192                 Description ...............................................................232
  CONSULT-II Reference Value in Data Monitor                                           CONSULT-II Reference Value in Data Monitor
  Mode ........................................................................192     Mode ........................................................................232
  ECM Terminals and Reference Value .....................192                           ECM Terminals and Reference Value .....................232




                                                                                EC-2
                                                     CONTENTS                                  (Cont'd)
  On Board Diagnosis Logic.......................................232                   CONSULT-II Reference Value in Data Monitor                                         GI
  DTC Confirmation Procedure ..................................233                     Mode ........................................................................275
  Wiring Diagram ........................................................234           ECM Terminals and Reference Value .....................275
  Diagnostic Procedure ..............................................235               On Board Diagnosis Logic.......................................275                 MA
DTC P0137 HEATED OXYGEN SENSOR 2                                                       DTC Confirmation Procedure ..................................276
(REAR) (MIN. VOLTAGE MONITORING)...................237                                 Wiring Diagram ........................................................277
  Component Description ...........................................237                 Diagnostic Procedure ..............................................278
                                                                                                                                                                          EM
  CONSULT-II Reference Value in Data Monitor                                         DTC P0171 FUEL INJECTION SYSTEM
  Mode ........................................................................237   FUNCTION (LEAN SIDE) ............................................280                 LC
  ECM Terminals and Reference Value .....................237                           On Board Diagnosis Logic.......................................280
  On Board Diagnosis Logic.......................................237                   DTC Confirmation Procedure ..................................280
  DTC Confirmation Procedure ..................................238                     Wiring Diagram ........................................................282
  Overall Function Check ...........................................239                Diagnostic Procedure ..............................................283
  Wiring Diagram ........................................................240         DTC P0172 FUEL INJECTION SYSTEM
  Diagnostic Procedure ..............................................241             FUNCTION (RICH SIDE) .............................................287                FE
DTC P0138 HEATED OXYGEN SENSOR 2                                                       On Board Diagnosis Logic.......................................287
(REAR) (MIN. VOLTAGE MONITORING)...................247                                 DTC Confirmation Procedure ..................................287                   CL
  Component Description ...........................................247                 Wiring Diagram ........................................................289
  CONSULT-II Reference Value in Data Monitor                                           Diagnostic Procedure ..............................................290
  Mode ........................................................................247   DTC P0180 FUEL TANK TEMPERATURE                                                      MT
  ECM Terminals and Reference Value .....................247                         SENSOR ......................................................................294
  On Board Diagnosis Logic.......................................247                   Component Description ...........................................294
  DTC Confirmation Procedure ..................................248                     On Board Diagnosis Logic.......................................294                 AT
  Overall Function Check ...........................................249                DTC Confirmation Procedure ..................................295
  Wiring Diagram ........................................................250           Wiring Diagram ........................................................296
                                                                                                                                                                          TF
  Diagnostic Procedure ..............................................251               Diagnostic Procedure ..............................................297
DTC P0139 HEATED OXYGEN SENSOR 2                                                     DTC P0300 - P0304 NO. 4 - 1 CYLINDER
(REAR) (RESPONSE MONITORING).........................257                             MISFIRE, MULTIPLE CYLINDER MISFIRE ...............300                                PD
  Component Description ...........................................257                 On Board Diagnosis Logic.......................................300
  CONSULT-II Reference Value in Data Monitor                                           DTC Confirmation Procedure ..................................300
  Mode ........................................................................257     Diagnostic Procedure ..............................................301             AX
  ECM Terminals and Reference Value .....................257                         DTC P0325 KNOCK SENSOR (KS) ...........................309
  On Board Diagnosis Logic.......................................257                   Component Description ...........................................309
  DTC Confirmation Procedure ..................................258                     ECM Terminals and Reference Value .....................309
                                                                                                                                                                          SU
  Overall Function Check ...........................................259                On Board Diagnosis Logic.......................................309
  Wiring Diagram ........................................................260           DTC Confirmation Procedure ..................................309                   BR
  Diagnostic Procedure ..............................................261               Wiring Diagram ........................................................310
DTC P0140 HEATED OXYGEN SENSOR 2                                                       Diagnostic Procedure ..............................................311
(REAR) (HIGH VOLTAGE) ..........................................267                  DTC P0335 CRANKSHAFT POSITION SENSOR                                                 ST
  Component Description ...........................................267               (CKPS) (OBD)..............................................................313
  CONSULT-II Reference Value in Data Monitor                                           Component Description ...........................................313
  Mode ........................................................................267     ECM Terminals and Reference Value .....................313                         RS
  ECM Terminals and Reference Value .....................267                           On Board Diagnosis Logic.......................................313
  On Board Diagnosis Logic.......................................267                   DTC Confirmation Procedure ..................................314
                                                                                                                                                                          BT
  DTC Confirmation Procedure ..................................268                     Wiring Diagram ........................................................315
  Overall Function Check ...........................................268                Diagnostic Procedure ..............................................316
  Wiring Diagram ........................................................269         DTC P0340 CAMSHAFT POSITION SENSOR                                                   HA
  Diagnostic Procedure ..............................................270             (CMPS).........................................................................319
DTC P0141 HEATED OXYGEN SENSOR 2                                                       Component Description ...........................................319
HEATER (REAR) .........................................................275             ECM Terminals and Reference Value .....................319                         SC
  Description ...............................................................275       On Board Diagnosis Logic.......................................320
                                                                                       DTC Confirmation Procedure ..................................321
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-3
                                                     CONTENTS                                  (Cont'd)
  Wiring Diagram ........................................................322            DTC Confirmation Procedure ..................................387
  Diagnostic Procedure ..............................................323                Wiring Diagram ........................................................388
DTC P0400 EGR FUNCTION (CLOSE)......................327                                 Diagnostic Procedure ..............................................389
  Description ...............................................................327     DTC P0455 EVAP CONTROL SYSTEM (GROSS
  On Board Diagnosis Logic.......................................328                 LEAK)...........................................................................400
  DTC Confirmation Procedure ..................................329                      On Board Diagnosis Logic.......................................400
  Overall Function Check ...........................................330                 DTC Confirmation Procedure ..................................401
  Wiring Diagram ........................................................331            Diagnostic Procedure ..............................................402
  Diagnostic Procedure ..............................................332             DTC P0460 FUEL LEVEL SENSOR FUNCTION
DTC P0402 EGRC-BPT VALVE FUNCTION..............339                                   (SLOSH).......................................................................413
  Description ...............................................................339        Component Description ...........................................413
  On Board Diagnosis Logic.......................................339                    On Board Diagnostic Logic......................................413
  DTC Confirmation Procedure ..................................340                      Possible Cause........................................................413
  Overall Function Check ...........................................341                 DTC Confirmation Procedure ..................................413
  Diagnostic Procedure ..............................................342                Wiring Diagram ........................................................414
DTC P0420 THREE WAY CATALYST FUNCTION ...347                                            Diagnostic Procedure ..............................................415
  On Board Diagnosis Logic.......................................347                 DTC P0461 FUEL LEVEL SENSOR FUNCTION .......417
  DTC Confirmation Procedure ..................................347                      Component Description ...........................................417
  Overall Function Check ...........................................348                 On Board Diagnostic Logic......................................417
  Diagnostic Procedure ..............................................349                Possible Cause........................................................417
DTC P0440 EVAP CONTROL SYSTEM (SMALL                                                    Overall Function Check ...........................................417
LEAK)(NEGATIVE PRESSURE).................................352                         DTC P0464 FUEL LEVEL SENSOR CIRCUIT ...........419
  On Board Diagnosis Logic.......................................352                    Component Description ...........................................419
  DTC Confirmation Procedure ..................................354                      On Board Diagnostic Logic......................................419
  Diagnostic Procedure ..............................................356                Possible Cause........................................................419
DTC P0443 EVAP CANISTER PURGE VOLUME                                                    DTC Confirmation Procedure ..................................419
CONTROL SOLENOID VALVE (CIRCUIT).................369                                    Wiring Diagram ........................................................420
  Description ...............................................................369        Diagnostic Procedure ..............................................421
  CONSULT-II Reference Value in Data Monitor                                         DTC P0500 VEHICLE SPEED SENSOR (VSS) .........423
  Mode ........................................................................369      Component Description ...........................................423
  ECM Terminals and Reference Value .....................370                            ECM Terminals and Reference Value .....................423
  On Board Diagnosis Logic.......................................370                    On Board Diagnosis Logic.......................................423
  DTC Confirmation Procedure ..................................371                      DTC Confirmation Procedure ..................................423
  Wiring Diagram ........................................................372            Overall Function Check ...........................................424
  Diagnostic Procedure ..............................................373                Wiring Diagram ........................................................425
DTC P0446 EVAPORATIVE EMISSION (EVAP)                                                   Diagnostic Procedure ..............................................426
CANISTER VENT CONTROL VALVE (CIRCUIT) ......377                                      DTC P0505 IDLE AIR CONTROL VALVE (IACV)
  Component Description ...........................................377               - AUXILIARY AIR CONTROL (AAC) VALVE .............427
  CONSULT-II Reference Value in Data Monitor                                            Description ...............................................................427
  Mode ........................................................................377      CONSULT-II Reference Value in Data Monitor
  ECM Terminals and Reference Value .....................377                            Mode ........................................................................428
  On Board Diagnosis Logic.......................................377                    ECM Terminals and Reference Value .....................428
  DTC Confirmation Procedure ..................................378                      On Board Diagnosis Logic.......................................428
  Wiring Diagram ........................................................379            DTC Confirmation Procedure ..................................429
  Diagnostic Procedure ..............................................380                Wiring Diagram ........................................................430
DTC P0450 EVAPORATIVE EMISSION (EVAP)                                                   Diagnostic Procedure ..............................................431
CONTROL SYSTEM PRESSURE SENSOR ..............385                                     DTC P0510 CLOSED THROTTLE POSITION
  Component Description ...........................................385               SWITCH .......................................................................433
  CONSULT-II Reference Value in Data Monitor                                            Component Description ...........................................433
  Mode ........................................................................385      ECM Terminals and Reference Value .....................433
  ECM Terminals and Reference Value .....................385                            On Board Diagnosis Logic.......................................433
  On Board Diagnosis Logic.......................................386                    DTC Confirmation Procedure ..................................434




                                                                                EC-4
                                                     CONTENTS                                  (Cont'd)
  Overall Function Check ...........................................434                Possible Cause........................................................474          GI
  Wiring Diagram ........................................................435           DTC Confirmation Procedure ..................................475
  Diagnostic Procedure ..............................................436               Diagnostic Procedure ..............................................475
DTC P0605 ECM .........................................................440           DTC P1441 EVAP CONTROL SYSTEM (VERY                                                  MA
  Component Description ...........................................440               SMALL LEAK) .............................................................476
  On Board Diagnosis Logic.......................................440                   On Board Diagnosis Logic.......................................476
  DTC Confirmation Procedure ..................................440                     Possible Cause........................................................476
                                                                                                                                                                          EM
  Diagnostic Procedure ..............................................441               DTC Confirmation Procedure ..................................477
DTC P1126 THERMOSTAT FUNCTION.....................442                                  Diagnostic Procedure ..............................................479             LC
  On Board Diagnosis Logic.......................................442                 DTC P1444 EVAP CANISTER PURGE VOLUME
  Possible Cause........................................................442          CONTROL SOLENOID VALVE...................................491
  DTC Confirmation Procedure ..................................442                     Description ...............................................................491
  Diagnostic Procedure ..............................................443               CONSULT-II Reference Value in Data Monitor
DTC P1148 CLOSED LOOP CONTROL ....................444                                  Mode ........................................................................491
  On Board Diagnosis Logic.......................................444                   ECM Terminals and Reference Value .....................492                         FE
  DTC Confirmation Procedure ..................................444                     On Board Diagnosis Logic.......................................492
  Overall Function Check ...........................................445                DTC Confirmation Procedure ..................................493                   CL
  Diagnostic Procedure ..............................................445               Wiring Diagram ........................................................494
DTC P1336 CRANKSHAFT POSITION SENSOR                                                   Diagnostic Procedure ..............................................495
(CKPS) (OBD) (COG)..................................................446              DTC P1446 EVAPORATIVE EMISSION (EVAP)                                                MT
  Component Description ...........................................446               CANISTER VENT CONTROL VALVE (CLOSE).........503
  ECM Terminals and Reference Value .....................446                           Component Description ...........................................503
  On Board Diagnosis Logic.......................................447                   CONSULT-II Reference Value in Data Monitor                                         AT
  DTC Confirmation Procedure ..................................447                     Mode ........................................................................503
  Wiring Diagram ........................................................448           ECM Terminals and Reference Value .....................503
                                                                                                                                                                          TF
  Diagnostic Procedure ..............................................449               On Board Diagnosis Logic.......................................503
DTC P1400 EGRC-SOLENOID VALVE ......................452                                DTC Confirmation Procedure ..................................504
  Component Description ...........................................452                 Diagnostic Procedure ..............................................505             PD
  CONSULT-II Reference Value in Data Monitor                                         DTC P1447 EVAPORATIVE EMISSION (EVAP)
  Mode ........................................................................452   CONTROL SYSTEM PURGE FLOW
  ECM Terminals and Reference Value .....................452                         MONITORING ..............................................................509         AX
  On Board Diagnosis Logic.......................................452                   System Description..................................................509
  DTC Confirmation Procedure ..................................453                     On Board Diagnosis Logic.......................................509
  Overall Function Check ...........................................453                DTC Confirmation Procedure ..................................510
                                                                                                                                                                          SU
  Wiring Diagram ........................................................454           Overall Function Check ...........................................510
  Diagnostic Procedure ..............................................455               Diagnostic Procedure ..............................................511             BR
DTC P1401 EGR TEMPERATURE SENSOR.............459                                     DTC P1448 EVAPORATIVE EMISSION (EVAP)
  Component Description ...........................................459               CANISTER VENT CONTROL VALVE (OPEN)...........519
  On Board Diagnosis Logic.......................................459                   Component Description ...........................................519               ST
  DTC Confirmation Procedure ..................................460                     CONSULT-II Reference Value in Data Monitor
  Overall Function Check ...........................................461                Mode ........................................................................519
  Wiring Diagram ........................................................462           ECM Terminals and Reference Value .....................519                         RS
  Diagnostic Procedure ..............................................463               On Board Diagnosis Logic.......................................519
DTC P1402 EGR FUNCTION (OPEN) ........................465                              DTC Confirmation Procedure ..................................520
                                                                                                                                                                          BT
  Description ...............................................................465       Overall Function Check ...........................................521
  On Board Diagnosis Logic.......................................466                   Diagnostic Procedure ..............................................521
  DTC Confirmation Procedure ..................................466                   DTC P1464 FUEL LEVEL SENSOR CIRCUIT                                                  HA
  Wiring Diagram ........................................................468         (GROUND SIGNAL) ....................................................527
  Diagnostic Procedure ..............................................469               Component Description ...........................................527
DTC P1440 EVAP CONTROL SYSTEM (SMALL                                                   On Board Diagnostic Logic......................................527                 SC
LEAK) (POSITIVE PRESSURE) .................................474                         Possible Cause........................................................527
  On Board Diagnosis Logic.......................................474                   DTC Confirmation Procedure ..................................527
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-5
                                                     CONTENTS                                  (Cont'd)
  Wiring Diagram ........................................................528           CONSULT-II Reference Value in Data Monitor
  Diagnostic Procedure ..............................................529               Mode ........................................................................572
DTC P1490 VACUUM CUT VALVE BYPASS                                                      ECM Terminals and Reference Value .....................572
VALVE (CIRCUIT)........................................................530             Wiring Diagram ........................................................573
  Description ...............................................................530       Diagnostic Procedure ..............................................574
  CONSULT-II Reference Value in Data Monitor                                         FUEL PUMP.................................................................576
  Mode ........................................................................530     System Description..................................................576
  ECM Terminals and Reference Value .....................530                           Component Description ...........................................576
  On Board Diagnosis Logic.......................................531                   CONSULT-II Reference Value in Data Monitor
  DTC Confirmation Procedure ..................................531                     Mode ........................................................................576
  Wiring Diagram ........................................................532           ECM Terminals and Reference Value .....................577
  Diagnostic Procedure ..............................................533               Wiring Diagram ........................................................578
DTC P1491 VACUUM CUT VALVE BYPASS                                                      Diagnostic Procedure ..............................................579
VALVE..........................................................................537   POWER STEERING OIL PRESSURE SWITCH.........584
  Description ...............................................................537       Component Description ...........................................584
  CONSULT-II Reference Value in Data Monitor                                           CONSULT-II Reference Value in Data Monitor
  Mode ........................................................................537     Mode ........................................................................584
  ECM Terminals and Reference Value .....................537                           ECM Terminals and Reference Value .....................584
  On Board Diagnosis Logic.......................................538                   Wiring Diagram ........................................................585
  DTC Confirmation Procedure ..................................538                     Diagnostic Procedure ..............................................586
  Overall Function Check ...........................................539              IACV-FICD SOLENOID VALVE...................................588
  Wiring Diagram ........................................................540           Component Description ...........................................588
  Diagnostic Procedure ..............................................541               ECM Terminals and Reference Value .....................588
DTC P1706 PARK/NEUTRAL POSITION (PNP)                                                  Wiring Diagram ........................................................589
SWITCH .......................................................................548      Diagnostic Procedure ..............................................590
  Component Description ...........................................548               MIL & DATA LINK CONNECTORS ............................594
  CONSULT-II Reference Value in Data Monitor                                           Wiring Diagram ........................................................594
  Mode ........................................................................548   SERVICE DATA AND SPECIFICATIONS (SDS) .......595
  ECM Terminals and Reference Value .....................548                           Fuel Pressure Regulator..........................................595
  On Board Diagnosis Logic.......................................548                   Idle Speed and Ignition Timing................................595
  DTC Confirmation Procedure ..................................549                     Ignition Coil ..............................................................595
  Overall Function Check ...........................................550                Mass Air Flow Sensor..............................................595
  Wiring Diagram ........................................................551           Engine Coolant Temperature Sensor ......................595
  Diagnostic Procedure For M/T Models....................552                           EGR Temperature Sensor .......................................595
TROUBLE DIAGNOSIS FOR OVERHEAT .................554                                    Fuel Pump ...............................................................595
  On Board Diagnosis Logic.......................................554                   IACV-AAC Valve ......................................................596
  Overall Function Check ...........................................554                Injector .....................................................................596
  Diagnostic Procedure ..............................................555               Resistor....................................................................596
  Main 11 Causes of Overheating..............................558                       Throttle Position Sensor ..........................................596
IGNITION SIGNAL.......................................................559              Heated Oxygen Sensor 1 Heater (Front) ................596
  Component Description ...........................................559                 Calculated Load Value.............................................596
  CONSULT-II Reference Value in Data Monitor                                           Intake Air Temperature Sensor................................596
  Mode ........................................................................559     Heated Oxygen Sensor 2 Heater (Rear).................596
  ECM Terminals and Reference Value .....................560                           Crankshaft Position Sensor (OBD)..........................596
  Wiring Diagram ........................................................561           Fuel Tank Temperature Sensor ...............................596
  Diagnostic Procedure ..............................................562
INJECTOR ...................................................................567                                          VG33E
  Component Description ...........................................567
  ECM Terminals and Reference Value .....................567                         TROUBLE DIAGNOSIS - INDEX ................................597
  Wiring Diagram ........................................................568           Alphabetical & P No. Index for DTC .......................597
  Diagnostic Procedure ..............................................569             PRECAUTIONS ...........................................................603
START SIGNAL...........................................................572             Supplemental Restraint System (SRS) AIR
                                                                                       BAG and SEAT BELT PRE-TENSIONER...........603



                                                                                EC-6
                                                     CONTENTS                                   (Cont'd)
  Precautions for On Board Diagnostic (OBD)                                             CONSULT-II Reference Value in Data Monitor                                         GI
  System of Engine and A/T.......................................603                    Mode ........................................................................714
  Engine Fuel & Emission Control System ................604                             Major Sensor Reference Graph in Data Monitor
  Precautions ..............................................................605         Mode ........................................................................716   MA
  Wiring Diagrams and Trouble Diagnosis.................606                             ECM Terminals and Reference Value .....................719
PREPARATION ...........................................................607            TROUBLE DIAGNOSIS - SPECIFICATION
  Special Service Tools ..............................................607             VALUE..........................................................................728
                                                                                                                                                                           EM
  Commercial Service Tools .......................................607                   Description ...............................................................728
ENGINE AND EMISSION CONTROL OVERALL                                                     Testing Condition .....................................................728         LC
SYSTEM.......................................................................609        Inspection Procedure...............................................728
  Engine Control Component Parts Location.............609                               Diagnostic Procedure ..............................................729
  Circuit Diagram ........................................................611         TROUBLE DIAGNOSIS FOR INTERMITTENT
  System Diagram ......................................................612            INCIDENT.....................................................................732
  Vacuum Hose Drawing ............................................613                   Description ...............................................................732
  System Chart ...........................................................614           Diagnostic Procedure ..............................................732             FE
ENGINE AND EMISSION BASIC CONTROL                                                     TROUBLE DIAGNOSIS FOR POWER SUPPLY........733
SYSTEM DESCRIPTION .............................................615                     Main Power Supply and Ground Circuit..................733                          CL
  Multiport Fuel Injection (MFI) System .....................615                      DTC P0100 MASS AIR FLOW SENSOR (MAFS)......739
  Distributor Ignition (DI) System ...............................617                   Component Description ...........................................739
  Air Conditioning Cut Control....................................618                   CONSULT-II Reference Value in Data Monitor                                         MT
  Fuel Cut Control (at no load & high engine                                            Mode ........................................................................739
  speed) ......................................................................619      ECM Terminals and Reference Value .....................739
  Evaporative Emission System .................................619                      On Board Diagnosis Logic.......................................739                 AT
  On Board Refueling Vapor Recovery (ORVR) ........625                                  DTC Confirmation Procedure ..................................740
  Positive Crankcase Ventilation ................................635                    Overall Function Check ...........................................742
                                                                                                                                                                           TF
BASIC SERVICE PROCEDURE .................................637                            Wiring Diagram ........................................................743
  Fuel Pressure Release ............................................637                 Diagnostic Procedure ..............................................744
  Fuel Pressure Check ...............................................637              DTC P0105 ABSOLUTE PRESSURE SENSOR ........748                                       PD
  Fuel Pressure Regulator Check ..............................638                       Component Description ...........................................748
  Injector .....................................................................638     On Board Diagnosis Logic.......................................748
  Fast Idle Cam (FIC).................................................639               DTC Confirmation Procedure ..................................748                   AX
  Idle Speed/Ignition Timing/Idle Mixture Ratio                                         Diagnostic Procedure ..............................................749
  Adjustment ...............................................................641       DTC P0110 INTAKE AIR TEMPERATURE
ON BOARD DIAGNOSTIC SYSTEM                                                            SENSOR ......................................................................750
                                                                                                                                                                           SU
DESCRIPTION .............................................................653            Component Description ...........................................750
  Introduction ..............................................................653        On Board Diagnosis Logic.......................................750                 BR
  Two Trip Detection Logic .........................................653                 DTC Confirmation Procedure ..................................750
  Emission-related Diagnostic Information .................654                          Wiring Diagram ........................................................752
  Malfunction Indicator Lamp (MIL)............................668                       Diagnostic Procedure ..............................................753             ST
  OBD System Operation Chart .................................669                     DTC P0115 ENGINE COOLANT TEMPERATURE
  CONSULT-II .............................................................675         SENSOR (ECTS) (CIRCUIT) .......................................755
  Generic Scan Tool (GST) ........................................688                   Component Description ...........................................755               RS
TROUBLE DIAGNOSIS - INTRODUCTION................690                                     On Board Diagnosis Logic.......................................755
  Introduction ..............................................................690        DTC Confirmation Procedure ..................................756
                                                                                                                                                                           BT
  Work Flow................................................................692          Wiring Diagram ........................................................757
TROUBLE DIAGNOSIS - BASIC INSPECTION .........694                                       Diagnostic Procedure ..............................................758
  Basic Inspection.......................................................694          DTC P0120 THROTTLE POSITION SENSOR ...........760                                    HA
TROUBLE DIAGNOSIS - GENERAL                                                             Description ...............................................................760
DESCRIPTION .............................................................708            CONSULT-II Reference Value in Data Monitor
  DTC Inspection Priority Chart..................................708                    Mode ........................................................................760   SC
  Fail-safe Chart .........................................................709          ECM Terminals and Reference Value .....................761
  Symptom Matrix Chart.............................................710                  On Board Diagnosis Logic.......................................761
                                                                                                                                                                           EL

                                                                                                                                                                           IDX
                                                                                 EC-7
                                                     CONTENTS                                  (Cont'd)
  DTC Confirmation Procedure ..................................762                     Overall Function Check ...........................................809
  Wiring Diagram ........................................................765           Wiring Diagram ........................................................810
  Diagnostic Procedure ..............................................766               Diagnostic Procedure ..............................................812
DTC P0125 ENGINE COOLANT TEMPERATURE                                                 DTC P0134, P0154 HEATED OXYGEN SENSOR 1
SENSOR (ECTS) .........................................................773           (FRONT) (BANK 1)/(BANK 2) (HIGH VOLTAGE)......821
  Description ...............................................................773       Component Description ...........................................821
  On Board Diagnosis Logic.......................................773                   CONSULT-II Reference Value in Data Monitor
  DTC Confirmation Procedure ..................................774                     Mode ........................................................................821
  Wiring Diagram ........................................................775           ECM Terminals and Reference Value .....................821
  Diagnostic Procedure ..............................................776               On Board Diagnosis Logic.......................................822
DTC P0130, P0150 HEATED OXYGEN SENSOR 1                                                DTC Confirmation Procedure ..................................822
(FRONT) (BANK 1)/(BANK 2) (CIRCUIT) ..................778                              Wiring Diagram ........................................................823
  Component Description ...........................................778                 Diagnostic Procedure ..............................................825
  CONSULT-II Reference Value in Data Monitor                                         DTC P0135, P0155 HEATED OXYGEN SENSOR 1
  Mode ........................................................................778   HEATER (FRONT) (BANK 1)/(BANK 2).....................829
  ECM Terminals and Reference Value .....................778                           Description ...............................................................829
  On Board Diagnosis Logic.......................................779                   CONSULT-II Reference Value in Data Monitor
  DTC Confirmation Procedure ..................................780           



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