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                                                                                       ENGINE CONTROL SYSTEM                                                                GI




                                                                                                   SECTION                       EC                                         MA

                                                                                                                                                                            EM

                                                                                                                                                                            LC




                                                                 CONTENTS                                                                                                   FE


                                   KA24DE                                              ON BOARD DIAGNOSTIC SYSTEM
                                                                                                                                                                            CL
                                                                                       DESCRIPTION ...............................................................56
TROUBLE DIAGNOSIS - INDEX ..................................13
                                                                                         Introduction ................................................................56    MT
  Alphabetical & P No. Index for DTC .........................13
                                                                                         Two Trip Detection Logic ...........................................56
PRECAUTIONS .............................................................17
                                                                                         Emission-related Diagnostic Information ...................57
  Supplemental Restraint System (SRS) AIR
                                                                                         Malfunction Indicator Lamp (MIL)..............................69                   AT
  BAG and SEAT BELT PRE-TENSIONER.............17
                                                                                         OBD System Operation Chart ...................................73
  Precautions for On Board Diagnostic (OBD)
                                                                                         CONSULT-II ...............................................................78
  System of Engine and A/T.........................................17
                                                                                         Generic Scan Tool (GST) ..........................................89
                                                                                                                                                                            TF
  Engine Fuel & Emission Control System ..................18
                                                                                       TROUBLE DIAGNOSIS - INTRODUCTION..................91
  Precautions ................................................................19
                                                                                         Introduction ................................................................91    PD
  Wiring Diagrams and Trouble Diagnosis...................20
                                                                                         Work Flow..................................................................93
PREPARATION .............................................................21
                                                                                       TROUBLE DIAGNOSIS - BASIC INSPECTION ...........95
  Special Service Tools ................................................21
  Commercial Service Tools .........................................21
                                                                                         Basic Inspection.........................................................95        AX
                                                                                       TROUBLE DIAGNOSIS - GENERAL
ENGINE AND EMISSION CONTROL OVERALL
                                                                                       DESCRIPTION .............................................................109
SYSTEM.........................................................................23                                                                                           SU
                                                                                         DTC Inspection Priority Chart..................................109
  Engine Control Component Parts Location...............23
                                                                                         Fail-safe Chart .........................................................110
  Circuit Diagram ..........................................................25
                                                                                         Symptom Matrix Chart............................................. 111
  System Diagram ........................................................26                                                                                                 BR
                                                                                         CONSULT-II Reference Value in Data Monitor
  Vacuum Hose Drawing ..............................................27
                                                                                         Mode ........................................................................115
  System Chart .............................................................28
ENGINE AND EMISSION BASIC CONTROL
                                                                                         Major Sensor Reference Graph in Data Monitor                                       ST
                                                                                         Mode ........................................................................117
SYSTEM DESCRIPTION ...............................................29
                                                                                         ECM Terminals and Reference Value .....................120
  Multiport Fuel Injection (MFI) System .......................29                                                                                                           RS
                                                                                       TROUBLE DIAGNOSIS FOR INTERMITTENT
  Distributor Ignition (DI) System .................................31
                                                                                       INCIDENT.....................................................................128
  Air Conditioning Cut Control......................................33
                                                                                         Description ...............................................................128
  Fuel Cut Control (at no load & high engine
                                                                                         Diagnostic Procedure ..............................................128
                                                                                                                                                                            BT
  speed) ........................................................................33
                                                                                       TROUBLE DIAGNOSIS FOR POWER SUPPLY........129
  Evaporative Emission System ...................................34
                                                                                         Main Power Supply and Ground Circuit..................129                          HA
  Positive Crankcase Ventilation ..................................39
                                                                                       DTC P0100 MASS AIR FLOW SENSOR (MAFS)......136
BASIC SERVICE PROCEDURE ...................................40
                                                                                         Component Description ...........................................136
  Fuel Pressure Release ..............................................40
                                                                                         CONSULT-II Reference Value in Data Monitor                                         SC
  Fuel Pressure Check .................................................40
                                                                                         Mode ........................................................................136
  Fuel Pressure Regulator Check ................................41
                                                                                         ECM Terminals and Reference Value .....................136
  Injector .......................................................................41
                                                                                         On Board Diagnosis Logic.......................................137                 EL
  Fast Idle Cam (FIC)...................................................41
                                                                                         DTC Confirmation Procedure ..................................137
  Idle Speed/Ignition Timing/Idle Mixture Ratio
                                                                                         Overall Function Check ...........................................139              IDX
  Adjustment .................................................................42
                                                                                         Wiring Diagram ........................................................140
                                                     CONTENTS                                  (Cont'd)
  Diagnostic Procedure ..............................................141             DTC P0131 FRONT HEATED OXYGEN SENSOR
DTC P0105 ABSOLUTE PRESSURE SENSOR ........146                                       (FRONT HO2S) (LEAN SHIFT MONITORING) ..........198
  Component Description ...........................................146                 Component Description ...........................................198
  On Board Diagnosis Logic.......................................146                   CONSULT-II Reference Value in Data Monitor
  DTC Confirmation Procedure ..................................147                     Mode ........................................................................198
  Overall Function Check ...........................................148                ECM Terminals and Reference Value .....................198
  Wiring Diagram ........................................................149           On Board Diagnosis Logic.......................................199
  Diagnostic Procedure ..............................................150               DTC Confirmation Procedure ..................................199
DTC P0110 INTAKE AIR TEMPERATURE                                                       Overall Function Check ...........................................200
SENSOR ......................................................................161       Diagnostic Procedure ..............................................200
  Component Description ...........................................161               DTC P0132 FRONT HEATED OXYGEN SENSOR
  On Board Diagnosis Logic.......................................161                 (FRONT HO2S) (RICH SHIFT MONITORING) ...........205
  DTC Confirmation Procedure ..................................162                     Component Description ...........................................205
  Wiring Diagram ........................................................163           CONSULT-II Reference Value in Data Monitor
  Diagnostic Procedure ..............................................164               Mode ........................................................................205
DTC P0115 ENGINE COOLANT TEMPERATURE                                                   ECM Terminals and Reference Value .....................205
SENSOR (ECTS) (CIRCUIT) .......................................167                     On Board Diagnosis Logic.......................................206
  Component Description ...........................................167                 DTC Confirmation Procedure ..................................206
  CONSULT-II Reference Value in Data Monitor                                           Overall Function Check ...........................................207
  Mode ........................................................................167     Diagnostic Procedure ..............................................207
  On Board Diagnosis Logic.......................................167                 DTC P0133 FRONT HEATED OXYGEN SENSOR
  DTC Confirmation Procedure ..................................168                   (FRONT HO2S) (RESPONSE MONITORING)............212
  Wiring Diagram ........................................................169           Component Description ...........................................212
  Diagnostic Procedure ..............................................170               CONSULT-II Reference Value in Data Monitor
DTC P0120 THROTTLE POSITION SENSOR ...........172                                      Mode ........................................................................212
  Component Description ...........................................172                 ECM Terminals and Reference Value .....................212
  CONSULT-II Reference Value in Data Monitor                                           On Board Diagnosis Logic.......................................213
  Mode ........................................................................172     DTC Confirmation Procedure ..................................213
  ECM Terminals and Reference Value .....................173                           Overall Function Check ...........................................214
  On Board Diagnosis Logic.......................................173                   Wiring Diagram ........................................................215
  DTC Confirmation Procedure ..................................174                     Diagnostic Procedure ..............................................216
  Wiring Diagram ........................................................177         DTC P0134 FRONT HEATED OXYGEN SENSOR
  Diagnostic Procedure ..............................................178             (FRONT HO2S) (HIGH VOLTAGE).............................223
DTC P0125 ENGINE COOLANT TEMPERATURE                                                   Component Description ...........................................223
(ECT) SENSOR............................................................186            CONSULT-II Reference Value in Data Monitor
  Component Description ...........................................186                 Mode ........................................................................223
  On Board Diagnosis Logic.......................................186                   ECM Terminals and Reference Value .....................223
  DTC Confirmation Procedure ..................................186                     On Board Diagnosis Logic.......................................224
  Wiring Diagram ........................................................187           DTC Confirmation Procedure ..................................224
  Diagnostic Procedure ..............................................188               Wiring Diagram ........................................................225
DTC P0130 FRONT HEATED OXYGEN SENSOR                                                   Diagnostic Procedure ..............................................226
(FRONT HO2S) (CIRCUIT)..........................................190                  DTC P0135 FRONT HEATED OXYGEN SENSOR
  Component Description ...........................................190               HEATER.......................................................................230
  CONSULT-II Reference Value in Data Monitor                                           Description ...............................................................230
  Mode ........................................................................190     CONSULT-II Reference Value in Data Monitor
  ECM Terminals and Reference Value .....................190                           Mode ........................................................................230
  On Board Diagnosis Logic.......................................191                   ECM Terminals and Reference Value .....................230
  DTC Confirmation Procedure ..................................192                     On Board Diagnosis Logic.......................................230
  Overall Function Check ...........................................193                DTC Confirmation Procedure ..................................231
  Wiring Diagram ........................................................194           Wiring Diagram ........................................................232
  Diagnostic Procedure ..............................................195               Diagnostic Procedure ..............................................233




                                                                                EC-2
                                                     CONTENTS                                  (Cont'd)
DTC P0137 REAR HEATED OXYGEN SENSOR                                                    Wiring Diagram ........................................................275         GI
(REAR HO2S) (MIN. VOLTAGE MONITORING)........235                                       Diagnostic Procedure ..............................................276
  Component Description ...........................................235               DTC P0171 FUEL INJECTION SYSTEM
  CONSULT-II Reference Value in Data Monitor                                         FUNCTION (LEAN SIDE) ............................................278                 MA
  Mode ........................................................................235     On Board Diagnosis Logic.......................................278
  ECM Terminals and Reference Value .....................235                           DTC Confirmation Procedure ..................................278
  On Board Diagnosis Logic.......................................235                   Wiring Diagram ........................................................280
                                                                                                                                                                          EM
  DTC Confirmation Procedure ..................................236                     Diagnostic Procedure ..............................................281
  Overall Function Check ...........................................237              DTC P0172 FUEL INJECTION SYSTEM                                                      LC
  Wiring Diagram ........................................................238         FUNCTION (RICH SIDE) .............................................286
  Diagnostic Procedure ..............................................239               On Board Diagnosis Logic.......................................286
DTC P0138 REAR HEATED OXYGEN SENSOR                                                    DTC Confirmation Procedure ..................................286
(REAR HO2S) (MAX. VOLTAGE MONITORING) ......245                                        Wiring Diagram ........................................................288
  Component Description ...........................................245                 Diagnostic Procedure ..............................................289
  CONSULT-II Reference Value in Data Monitor                                         DTC P0180 FUEL TANK TEMPERATURE                                                      FE
  Mode ........................................................................245   SENSOR ......................................................................293
  ECM Terminals and Reference Value .....................245                           Component Description ...........................................293               CL
  On Board Diagnosis Logic.......................................245                   On Board Diagnosis Logic.......................................293
  DTC Confirmation Procedure ..................................246                     DTC Confirmation Procedure ..................................294
  Overall Function Check ...........................................247                Wiring Diagram ........................................................295         MT
  Wiring Diagram ........................................................248           Diagnostic Procedure ..............................................296
  Diagnostic Procedure ..............................................249             DTC P0300 - P0304 NO. 4 - 1 CYLINDER
DTC P0139 REAR HEATED OXYGEN SENSOR                                                  MISFIRE, MULTIPLE CYLINDER MISFIRE ...............299                                AT
(REAR HO2S) (RESPONSE MONITORING)..............255                                     On Board Diagnosis Logic.......................................299
  Component Description ...........................................255                 DTC Confirmation Procedure ..................................299
                                                                                                                                                                          TF
  CONSULT-II Reference Value in Data Monitor                                           Diagnostic Procedure ..............................................300
  Mode ........................................................................255   DTC P0325 KNOCK SENSOR (KS) ...........................308
  ECM Terminals and Reference Value .....................255                           Component Description ...........................................308               PD
  On Board Diagnosis Logic.......................................255                   ECM Terminals and Reference Value .....................308
  DTC Confirmation Procedure ..................................256                     On Board Diagnosis Logic.......................................308
  Overall Function Check ...........................................257                DTC Confirmation Procedure ..................................308                   AX
  Wiring Diagram ........................................................258           Wiring Diagram ........................................................309
  Diagnostic Procedure ..............................................259               Diagnostic Procedure ..............................................310
DTC P0140 REAR HEATED OXYGEN SENSOR                                                  DTC P0335 CRANKSHAFT POSITION SENSOR
                                                                                                                                                                          SU
(REAR HO2S) (HIGH VOLTAGE) ...............................265                        (CKPS) (OBD)..............................................................312
  Component Description ...........................................265                 Component Description ...........................................312               BR
  CONSULT-II Reference Value in Data Monitor                                           ECM Terminals and Reference Value .....................312
  Mode ........................................................................265     On Board Diagnosis Logic.......................................312
  ECM Terminals and Reference Value .....................265                           DTC Confirmation Procedure ..................................313                   ST
  On Board Diagnosis Logic.......................................265                   Wiring Diagram ........................................................314
  DTC Confirmation Procedure ..................................266                     Diagnostic Procedure ..............................................315
  Overall Function Check ...........................................266              DTC P0340 CAMSHAFT POSITION SENSOR                                                   RS
  Wiring Diagram ........................................................267         (CMPS).........................................................................318
  Diagnostic Procedure ..............................................268               Component Description ...........................................318
                                                                                                                                                                          BT
DTC P0141 REAR HEATED OXYGEN SENSOR                                                    ECM Terminals and Reference Value .....................318
HEATER.......................................................................273       On Board Diagnosis Logic.......................................319
  Description ...............................................................273       DTC Confirmation Procedure ..................................320                   HA
  CONSULT-II Reference Value in Data Monitor                                           Wiring Diagram ........................................................321
  Mode ........................................................................273     Diagnostic Procedure ..............................................322
  ECM Terminals and Reference Value .....................273                         DTC P0400 EGR FUNCTION (CLOSE)......................326                              SC
  On Board Diagnosis Logic.......................................273                   Description ...............................................................326
  DTC Confirmation Procedure ..................................274                     On Board Diagnosis Logic.......................................327
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-3
                                                     CONTENTS                                   (Cont'd)
  DTC Confirmation Procedure ..................................328                      On Board Diagnosis Logic.......................................398
  Overall Function Check ...........................................329                 DTC Confirmation Procedure ..................................399
  Wiring Diagram ........................................................330            Diagnostic Procedure ..............................................400
  Diagnostic Procedure ..............................................331              DTC P0500 VEHICLE SPEED SENSOR (VSS) .........412
DTC P0402 EGRC-BPT VALVE FUNCTION..............338                                      Component Description ...........................................412
  Description ...............................................................338        ECM Terminals and Reference Value .....................412
  On Board Diagnosis Logic.......................................338                    On Board Diagnosis Logic.......................................412
  DTC Confirmation Procedure ..................................339                      DTC Confirmation Procedure ..................................412
  Overall Function Check ...........................................340                 Overall Function Check ...........................................413
  Diagnostic Procedure ..............................................341                Wiring Diagram ........................................................414
DTC P0420 THREE WAY CATALYST FUNCTION ...346                                            Diagnostic Procedure ..............................................415
  On Board Diagnosis Logic.......................................346                  DTC P0505 IDLE AIR CONTROL VALVE (IACV) -
  DTC Confirmation Procedure ..................................346                    AUXILIARY AIR CONTROL (AAC) VALVE ...............416
  Overall Function Check ...........................................347                 Description ...............................................................416
  Diagnostic Procedure ..............................................348                CONSULT-II Reference Value in Data Monitor
DTC P0440 EVAP CONTROL SYSTEM (SMALL                                                    Mode ........................................................................417
LEAK) (NEGATIVE PRESSURE)................................351                            ECM Terminals and Reference Value .....................417
  On Board Diagnosis Logic.......................................351                    On Board Diagnosis Logic.......................................417
  DTC Confirmation Procedure ..................................352                      DTC Confirmation Procedure ..................................418
  Diagnostic Procedure ..............................................354                Wiring Diagram ........................................................419
DTC P0443 EVAP CANISTER PURGE VOLUME                                                    Diagnostic Procedure ..............................................420
CONTROL SOLENOID VALVE (CIRCUIT).................367                                  DTC P0510 CLOSED THROTTLE POSITION
  Description ...............................................................367      SWITCH .......................................................................422
  CONSULT-II Reference Value in Data Monitor                                            Component Description ...........................................422
  Mode ........................................................................367      ECM Terminals and Reference Value .....................422
  ECM Terminals and Reference Value .....................368                            On Board Diagnosis Logic.......................................422
  On Board Diagnosis Logic.......................................368                    DTC Confirmation Procedure ..................................423
  DTC Confirmation Procedure ..................................369                      Overall Function Check ...........................................423
  Wiring Diagram ........................................................370            Wiring Diagram ........................................................424
  Diagnostic Procedure ..............................................371                Diagnostic Procedure ..............................................425
DTC P0446 EVAPORATIVE EMISSION (EVAP)                                                 DTC P0605 ECM .........................................................429
CANISTER VENT CONTROL VALVE (CIRCUIT) ......375                                         Component Description ...........................................429
  Component Description ...........................................375                  On Board Diagnosis Logic.......................................429
  CONSULT-II Reference Value in Data Monitor                                            DTC Confirmation Procedure ..................................429
  Mode ........................................................................375      Diagnostic Procedure ..............................................430
  ECM Terminals and Reference Value .....................375                          DTC P1105 MAP/BARO SWITCH SOLENOID
  On Board Diagnosis Logic.......................................375                  VALVE..........................................................................431
  DTC Confirmation Procedure ..................................376                      Description ...............................................................431
  Wiring Diagram ........................................................377            CONSULT-II Reference Value in Data Monitor
  Diagnostic Procedure ..............................................378                Mode ........................................................................431
DTC P0450 EVAPORATIVE EMISSION (EVAP)                                                   ECM Terminals and Reference Value .....................432
CONTROL SYSTEM PRESSURE SENSOR ..............383                                        On Board Diagnosis Logic.......................................432
  Component Description ...........................................383                  DTC Confirmation Procedure ..................................432
  CONSULT-II Reference Value in Data Monitor                                            Wiring Diagram ........................................................434
  Mode ........................................................................383      Diagnostic Procedure ..............................................435
  ECM Terminals and Reference Value .....................383                          DTC P1148 CLOSED LOOP CONTROL ....................447
  On Board Diagnosis Logic.......................................384                    On Board Diagnosis Logic.......................................447
  DTC Confirmation Procedure ..................................385                      DTC Confirmation Procedure ..................................447
  Wiring Diagram ........................................................386            Overall Function Check ...........................................448
  Diagnostic Procedure ..............................................387                Diagnostic Procedure ..............................................448
DTC P0455 EVAP CONTROL SYSTEM (GROSS                                                  DTC P1320 IGNITION SIGNAL...................................449
LEAK)...........................................................................398     Component Description ...........................................449




                                                                                 EC-4
                                                     CONTENTS                                  (Cont'd)
  CONSULT-II Reference Value in Data Monitor                                           Diagnostic Procedure ..............................................491             GI
  Mode ........................................................................449   DTC P1446 EVAPORATIVE EMISSION (EVAP)
  ECM Terminals and Reference Value .....................449                         CANISTER VENT CONTROL VALVE (CLOSE).........499
  On Board Diagnosis Logic.......................................450                   Component Description ...........................................499               MA
  DTC Confirmation Procedure ..................................450                     CONSULT-II Reference Value in Data Monitor
  Wiring Diagram ........................................................451           Mode ........................................................................499
  Diagnostic Procedure ..............................................452               ECM Terminals and Reference Value .....................499
                                                                                                                                                                          EM
DTC P1336 CRANKSHAFT POSITION SENSOR                                                   On Board Diagnosis Logic.......................................499
(CKPS) (OBD) (COG)..................................................457                DTC Confirmation Procedure ..................................500                   LC
  Component Description ...........................................457                 Diagnostic Procedure ..............................................501
  ECM Terminals and Reference Value .....................457                         DTC P1447 EVAPORATIVE EMISSION (EVAP)
  On Board Diagnosis Logic.......................................457                 CONTROL SYSTEM PURGE FLOW
  DTC Confirmation Procedure ..................................458                   MONITORING ..............................................................505
  Wiring Diagram ........................................................459           System Description..................................................505
  Diagnostic Procedure ..............................................460               On Board Diagnosis Logic.......................................505                 FE
DTC P1400 EGRC-SOLENOID VALVE ......................463                                DTC Confirmation Procedure ..................................506
  Component Description ...........................................463                 Overall Function Check ...........................................506              CL
  CONSULT-II Reference Value in Data Monitor                                           Diagnostic Procedure ..............................................507
  Mode ........................................................................463   DTC P1448 EVAPORATIVE EMISSION (EVAP)
  ECM Terminals and Reference Value .....................463                         CANISTER VENT CONTROL VALVE (OPEN)...........515                                     MT
  On Board Diagnosis Logic.......................................463                   Component Description ...........................................515
  DTC Confirmation Procedure ..................................464                     CONSULT-II Reference Value in Data Monitor
  Overall Function Check ...........................................464                Mode ........................................................................515   AT
  Wiring Diagram ........................................................465           ECM Terminals and Reference Value .....................515
  Diagnostic Procedure ..............................................466               On Board Diagnosis Logic.......................................515
                                                                                                                                                                          TF
DTC P1401 EGR TEMPERATURE SENSOR.............470                                       DTC Confirmation Procedure ..................................516
  Component Description ...........................................470                 Overall Function Check ...........................................517
  On Board Diagnosis Logic.......................................470                   Diagnostic Procedure ..............................................518             PD
  DTC Confirmation Procedure ..................................471                   DTC P1490 VACUUM CUT VALVE BYPASS
  Overall Function Check ...........................................472              VALVE (CIRCUIT)........................................................523
  Wiring Diagram ........................................................473           Description ...............................................................523     AX
  Diagnostic Procedure ..............................................474               CONSULT-II Reference Value in Data Monitor
DTC P1402 EGR FUNCTION (OPEN) ........................476                              Mode ........................................................................523
  Description ...............................................................476       ECM Terminals and Reference Value .....................523
                                                                                                                                                                          SU
  On Board Diagnosis Logic.......................................477                   On Board Diagnosis Logic.......................................524
  DTC Confirmation Procedure ..................................477                     DTC Confirmation Procedure ..................................524                   BR
  Wiring Diagram ........................................................479           Wiring Diagram ........................................................525
  Diagnostic Procedure ..............................................480               Diagnostic Procedure ..............................................526
DTC P1440 EVAP CONTROL SYSTEM (SMALL                                                 DTC P1491 VACUUM CUT VALVE BYPASS                                                    ST
LEAK) (POSITIVE PRESSURE) .................................485                       VALVE..........................................................................530
  On Board Diagnosis Logic.......................................485                   Description ...............................................................530
  DTC Confirmation Procedure ..................................486                     CONSULT-II Reference Value in Data Monitor                                         RS
  Diagnostic Procedure ..............................................486               Mode ........................................................................530
DTC P1444 EVAP CANISTER PURGE VOLUME                                                   ECM Terminals and Reference Value .....................530
                                                                                                                                                                          BT
CONTROL SOLENOID VALVE...................................487                           On Board Diagnosis Logic.......................................531
  Description ...............................................................487       DTC Confirmation Procedure ..................................531
  CONSULT-II Reference Value in Data Monitor                                           Overall Function Check ...........................................532              HA
  Mode ........................................................................487     Wiring Diagram ........................................................533
  ECM Terminals and Reference Value .....................488                           Diagnostic Procedure ..............................................534
  On Board Diagnosis Logic.......................................488                 DTC P1706 PARK/NEUTRAL POSITION (PNP)                                                SC
  DTC Confirmation Procedure ..................................489                   SWITCH .......................................................................541
  Wiring Diagram ........................................................490           Component Description ...........................................541
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-5
                                                     CONTENTS                                  (Cont'd)
  CONSULT-II Reference Value in Data Monitor                                             EGR Temperature Sensor .......................................579
  Mode ........................................................................541       Fuel Pump ...............................................................579
  ECM Terminals and Reference Value .....................541                             IACV-AAC Valve ......................................................580
  On Board Diagnosis Logic.......................................541                     Injector .....................................................................580
  DTC Confirmation Procedure ..................................542                       Resistor....................................................................580
  Overall Function Check ...........................................543                  Throttle Position Sensor ..........................................580
  Wiring Diagram ........................................................544             Front Heated Oxygen Sensor Heater......................580
  Diagnostic Procedure For M/T Models....................545                             Calculated Load Value.............................................580
TROUBLE DIAGNOSIS FOR OVERHEAT .................547                                      Intake Air Temperature Sensor................................580
  On Board Diagnosis Logic.......................................547                     Rear Heated Oxygen Sensor Heater ......................580
  Overall Function Check ...........................................547                  Crankshaft Position Sensor (OBD)..........................580
  Diagnostic Procedure ..............................................548                 Fuel Tank Temperature Sensor ...............................580
  Main 11 Causes of Overheating..............................551
INJECTOR ...................................................................552                                           VG33E
  Component Description ...........................................552
  ECM Terminals and Reference Value .....................552                         TROUBLE DIAGNOSIS - INDEX ................................581
  Wiring Diagram ........................................................553           Alphabetical & P No. Index for DTC .......................581
  Diagnostic Procedure ..............................................554             PRECAUTIONS ...........................................................587
START SIGNAL...........................................................557             Supplemental Restraint System (SRS) AIR
  CONSULT-II Reference Value in Data Monitor                                           BAG and SEAT BELT PRE-TENSIONER...........587
  Mode ........................................................................557     Precautions for On Board Diagnostic (OBD)
  ECM Terminals and Reference Value .....................557                           System of Engine and A/T.......................................587
  Wiring Diagram ........................................................558           Engine Fuel & Emission Control System ................588
  Diagnostic Procedure ..............................................559               Precautions ..............................................................589
FUEL PUMP.................................................................561          Wiring Diagrams and Trouble Diagnosis.................590
  System Description..................................................561            PREPARATION ...........................................................591
  Component Description ...........................................561                 Special Service Tools ..............................................591
  CONSULT-II Reference Value in Data Monitor                                           Commercial Service Tools .......................................591
  Mode ........................................................................561   ENGINE AND EMISSION CONTROL OVERALL
  ECM Terminals and Reference Value .....................561                         SYSTEM.......................................................................593
  Wiring Diagram ........................................................562           Engine Control Component Parts Location.............593
  Diagnostic Procedure ..............................................563               Circuit Diagram ........................................................595
POWER STEERING OIL PRESSURE SWITCH.........568                                         System Diagram ......................................................596
  Component Description ...........................................568                 Vacuum Hose Drawing ............................................597
  CONSULT-II Reference Value in Data Monitor                                           System Chart ...........................................................598
  Mode ........................................................................568   ENGINE AND EMISSION BASIC CONTROL
  ECM Terminals and Reference Value .....................568                         SYSTEM DESCRIPTION .............................................599
  Wiring Diagram ........................................................569           Multiport Fuel Injection (MFI) System .....................599
  Diagnostic Procedure ..............................................570               Distributor Ignition (DI) System ...............................601
IACV-FICD SOLENOID VALVE...................................572                         Air Conditioning Cut Control....................................602
  Component Description ...........................................572                 Fuel Cut Control (at no load & high engine
  ECM Terminals and Reference Value .....................572                           speed) ......................................................................603
  Wiring Diagram ........................................................573           Evaporative Emission System .................................603
  Diagnostic Procedure ..............................................574               Positive Crankcase Ventilation ................................609
MIL & DATA LINK CONNECTORS ............................578                           BASIC SERVICE PROCEDURE .................................610
  Wiring Diagram ........................................................578           Fuel Pressure Release ............................................610
SERVICE DATA AND SPECIFICATIONS (SDS) .......579                                       Fuel Pressure Check ...............................................610
  Fuel Pressure Regulator..........................................579                 Fuel Pressure Regulator Check ..............................611
  Idle Speed and Ignition Timing................................579                    Injector .....................................................................611
  Ignition Coil ..............................................................579      Fast Idle Cam (FIC).................................................612
  Mass Air Flow Sensor..............................................579                Idle Speed/Ignition Timing/Idle Mixture Ratio
  Engine Coolant Temperature Sensor ......................579                          Adjustment ...............................................................614




                                                                                EC-6
                                                     CONTENTS                                  (Cont'd)
ON BOARD DIAGNOSTIC SYSTEM                                                             Wiring Diagram ........................................................736         GI
DESCRIPTION .............................................................627           Diagnostic Procedure ..............................................737
  Introduction ..............................................................627     DTC P0115 ENGINE COOLANT TEMPERATURE
  Two Trip Detection Logic .........................................627              SENSOR (ECTS) (CIRCUIT) .......................................739                   MA
  Emission-related Diagnostic Information .................628                         Component Description ...........................................739
  Malfunction Indicator Lamp (MIL)............................642                      On Board Diagnosis Logic.......................................739
  OBD System Operation Chart .................................646                      DTC Confirmation Procedure ..................................740
                                                                                                                                                                          EM
  CONSULT-II .............................................................651          Wiring Diagram ........................................................741
  Generic Scan Tool (GST) ........................................663                  Diagnostic Procedure ..............................................742             LC
TROUBLE DIAGNOSIS - INTRODUCTION................665                                  DTC P0120 THROTTLE POSITION SENSOR ...........744
  Introduction ..............................................................665       Description ...............................................................744
  Work Flow................................................................667         CONSULT-II Reference Value in Data Monitor
TROUBLE DIAGNOSIS - BASIC INSPECTION .........669                                      Mode ........................................................................744
  Basic Inspection.......................................................669           ECM Terminals and Reference Value .....................745
TROUBLE DIAGNOSIS - GENERAL                                                            On Board Diagnosis Logic.......................................745                 FE
DESCRIPTION .............................................................686           DTC Confirmation Procedure ..................................746
  DTC Inspection Priority Chart..................................686                   Wiring Diagram ........................................................749         CL
  Fail-safe Chart .........................................................687         Diagnostic Procedure ..............................................750
  Symptom Matrix Chart.............................................688               DTC P0125 ENGINE COOLANT TEMPERATURE
  CONSULT-II Reference Value in Data Monitor                                         SENSOR (ECTS) .........................................................758           MT
  Mode ........................................................................692     Description ...............................................................758
  Major Sensor Reference Graph in Data Monitor                                         On Board Diagnosis Logic.......................................758
  Mode ........................................................................694     DTC Confirmation Procedure ..................................759                   AT
  ECM Terminals and Reference Value .....................697                           Wiring Diagram ........................................................760
TROUBLE DIAGNOSIS FOR INTERMITTENT                                                     Diagnostic Procedure ..............................................761
                                                                                                                                                                          TF
INCIDENT.....................................................................706     DTC P0130 (RIGHT, -B1), P0150 (LEFT, -B2)
  Description ...............................................................706     FRONT HO2S (CIRCUIT) ............................................763
  Diagnostic Procedure ..............................................706               Component Description ...........................................763               PD
TROUBLE DIAGNOSIS FOR POWER SUPPLY........707                                          CONSULT-II Reference Value in Data Monitor
  Main Power Supply and Ground Circuit..................707                            Mode ........................................................................763
DTC P0100 MASS AIR FLOW SENSOR (MAFS)......713                                         ECM Terminals and Reference Value .....................763                         AX
  Component Description ...........................................713                 On Board Diagnosis Logic.......................................764
  CONSULT-II Reference Value in Data Monitor                                           DTC Confirmation Procedure ..................................765
  Mode ........................................................................713     Overall Function Check ...........................................766
                                                                                                                                                                          SU
  ECM Terminals and Reference Value .....................713                           Wiring Diagram ........................................................767
  On Board Diagnosis Logic.......................................713                   Diagnostic Procedure ..............................................769             BR
  DTC Confirmation Procedure ..................................714                   DTC P0131 (RIGHT, -B1), P0151 (LEFT, -B2)
  Overall Function Check ...........................................716              FRONT HO2S (LEAN SHIFT MONITORING).............772
  Wiring Diagram ........................................................717           Component Description ...........................................772               ST
  Diagnostic Procedure ..............................................718               CONSULT-II Reference Value in Data Monitor
DTC P0105 ABSOLUTE PRESSURE SENSOR ........722                                         Mode ........................................................................772
  Component Description ...........................................722                 ECM Terminals and Reference Value .....................772                         RS
  On Board Diagnosis Logic.......................................722                   On Board Diagnosis Logic.......................................773
  DTC Confirmation Procedure ..................................723                     DTC Confirmation Procedure ..................................774
                                                                                                                                                                          BT
  Overall Function Check ...........................................724                Overall Function Check ...........................................775
  Wiring Diagram ........................................................725           Diagnostic Procedure ..............................................775
  Diagnostic Procedure ..............................................726             DTC P0132 (RIGHT, -B1), P0152 (LEFT, -B2)                                            HA
DTC P0110 INTAKE AIR TEMPERATURE                                                     FRONT HO2S (RICH SHIFT MONITORING)..............780
SENSOR ......................................................................734       Component Description ...........................................780
  Component Description ...........................................734                 CONSULT-II Reference Value in Data Monitor                                         SC
  On Board Diagnosis Logic.......................................734                   Mode ........................................................................780
  DTC Confirmation Procedure ..................................734                     ECM Terminals and Reference Value .....................780
                                                                                                                                                                          EL

                                                                                                                                                                          IDX
                                                                                EC-7
                                                     CONTENTS                                  (Cont'd)
  On Board Diagnosis Logic.......................................781                   On Board Diagnosis Logic.......................................825
  DTC Confirmation Procedure ..................................782                     DTC Confirmation Procedure ..................................826
  Overall Function Check ...........................................783                Overall Function Check ...........................................827
  Diagnostic Procedure ..............................................783               Wiring Diagram ........................................................828
DTC P0133 (RIGHT, -B1), P0153 (LEFT, -B2)                                              Diagnostic Procedure ..............................................830
FRONT HO2S (RESPONSE MONITORING) ..............788                                   DTC P0139 (RIGHT, -B1), P0159 (LEFT, -B2)
  Component Description ...........................................788               REAR HO2S (RESPONSE MONITORING) ................835
  CONSULT-II Reference Value in Data Monitor                                           Component Description ...........................................835
  Mode ........................................................................788     CONSULT-II Reference Value in Data Monitor
  ECM Terminals and Reference Value .....................788                           Mode ........................................................................835
  On Board Diagnosis Logic.......................................789                   ECM Terminals and Reference Value .....................835
  DTC Confirmation Procedure ..................................789                     On Board Diagnosis Logic.......................................835
  Overall Function Check ...........................................790                DTC Confirmation Procedure ..................................836
  Wiring Diagram ........................................................791           Overall Function Check ...........................................837
  Diagnostic Procedure ..............................................793               Wiring Diagram ........................................................838
DTC P0134 (RIGHT, -B1), P0154 (LEFT, -B2)                                              Diagnostic Procedure ..............................................840
FRONT HO2S (HIGH VOLTAGE) ...............................801                         DTC P0140 (RIGHT, -B1), P0160 (LEFT, -B2)
  Component Description ...........................................801               REAR HO2S (HIGH VOLTAGE) .................................845
  CONSULT-II Reference Value in Data Monitor                                           Component Description ...........................................845
  Mode ........................................................................801     CONSULT-II Reference Value in Data Monitor
  ECM Terminals and 



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