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ENGINE CONTROL SYSTEM


B ENGINE

                                                                                                                                                                        A




                                                                           ENGINE CONTROL SYSTEM
                                                                                                       SECTION                     EC                                   EC



                                                                                                                                                                        C


                                                                                                                                                                        D


                                                                                                                                                                        E
                                                                    CONTENTS
INDEX FOR DTC ....................................................... 8     .          Description ............................................................. 43
                                                                                                                                                               .        F
  DTC No. Index ........................................................ 8  .          Component Inspection ........................................... 43     .
  Alphabetical Index ..................................................11   .        IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
PRECAUTIONS ....................................................... 16      .        NATS) ....................................................................... 45
                                                                                                                                                               .        G
  Precautions for Supplemental Restraint System                                        Description ............................................................. 45
                                                                                                                                                               .
  (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                            ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 46                           .
  SIONER" ............................................................... 16.          Introduction ............................................................ 46
                                                                                                                                                               .
                                                                                                                                                                        H
  Precautions for Battery Service ............................. 16          .          Two Trip Detection Logic ....................................... 46     .
  On Board Diagnostic (OBD) System of Engine and                                       Emission-Related Diagnostic Information .............. 47               .
  A/T ......................................................................... 16
                                                                            .          Malfunction Indicator Lamp (MIL) .......................... 62          .
  Precaution ............................................................. 17
                                                                            .          OBD System Operation Chart ............................... 65           .         I
  Wiring Diagrams and Trouble Diagnosis ............... 19                  .        BASIC SERVICE PROCEDURE .............................. 71                 .
PREPARATION ........................................................ 20     .          Basic Inspection .................................................... 71.
  Special Service Tools ............................................ 20     .          Idle Speed and Ignition Timing Check ................... 76             .        J
  Commercial Service Tools ..................................... 21         .          Idle Mixture Ratio Adjustment ................................ 77       .
ENGINE CONTROL SYSTEM ................................. 22                  .          VIN Registration .................................................... 88.
  System Diagram .................................................... 22    .          Accelerator Pedal Released Position Learning ..... 88                   .
                                                                                                                                                                        K
  Multiport Fuel Injection (MFI) System ................... 23              .          Throttle Valve Closed Position Learning ................ 88             .
  Electronic Ignition (EI) System .............................. 25         .          Idle Air Volume Learning ....................................... 89     .
  Fuel Cut Control (at No Load and High Engine                                         Fuel Pressure Check ............................................. 91    .
  Speed) ................................................................... 26
                                                                            .        TROUBLE DIAGNOSIS ........................................... 93          .        L
AIR CONDITIONING CUT CONTROL .................... 27                        .          Trouble Diagnosis Introduction .............................. 93        .
  Input/Output Signal Chart ...................................... 27       .          DTC Inspection Priority Chart ................................ 99       .
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 28                                    ...        Fail-Safe Chart .................................................... 101.        M
  System Description ............................................... 28     .          Symptom Matrix Chart ......................................... 102      .
  Component Description ......................................... 29        .          Engine Control Component Parts Location ......... 106                   .
CAN COMMUNICATION ......................................... 30              .          Vacuum Hose Drawing ........................................ 112        .
  System Description ............................................... 30     .          Circuit Diagram .................................................... 113.
EVAPORATIVE EMISSION SYSTEM ...................... 31                       .          ECM Harness Connector Terminal Layout .......... 115                    .
  Description ............................................................ 31
                                                                            .          ECM Terminals and Reference Value .................. 115                .
  Component Inspection .......................................... 34        .          CONSULT-II Function (ENGINE) ......................... 124              .
  Removal and Installation ....................................... 35       .          Generic Scan Tool (GST) Function ...................... 136             .
  How to Detect Fuel Vapor Leakage ...................... 35                .          CONSULT-II Reference Value in Data Monitor .... 138                     .
ON BOARD REFUELING VAPOR RECOVERY                                                      Major Sensor Reference Graph in Data Monitor
(ORVR) ..................................................................... 38
                                                                            .          Mode .................................................................... 141
                                                                                                                                                               .
  System Description ............................................... 38     .        TROUBLE DIAGNOSIS - SPECIFICATION VALUE 144                               .
  Diagnostic Procedure ............................................ 39      .          Description ........................................................... 144
                                                                                                                                                               .
  Component Inspection .......................................... 41        .          Testing Condition ................................................. 144 .
POSITIVE CRANKCASE VENTILATION ................ 43                          .          Inspection Procedure ........................................... 144    .
                                                                                       Diagnostic Procedure .......................................... 145     .


Edition: 2004 September                                                        EC-1                                                         2005 G35 Coupe
TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-                                           Diagnostic Procedure ........................................... 198
                                                                                                                                                     .
DENT ...................................................................... 154
                                                                          .        Component Inspection ......................................... 199.
 Description ........................................................... 154
                                                                          .        Removal and Installation ...................................... 199
                                                                                                                                                     .
 Diagnostic Procedure .......................................... 154      .       DTC P0117, P0118 ECT SENSOR ......................... 200          .
POWER SUPPLY AND GROUND CIRCUIT .......... 155                            .        Component Description ....................................... 200 .
 Wiring Diagram .................................................... 155  .        On Board Diagnosis Logic ................................... 200  .
 Diagnostic Procedure .......................................... 158      .        DTC Confirmation Procedure ............................... 201    .
 Ground Inspection ............................................... 162    .        Wiring Diagram .................................................... 202
                                                                                                                                                     .
DTC U1000, U1001 CAN COMMUNICATION LINE. 164                                       Diagnostic Procedure ........................................... 203
                                                                                                                                                     .
 Description ........................................................... 164
                                                                          .        Component Inspection ......................................... 204.
 On Board Diagnosis Logic ................................... 164         .        Removal and Installation ...................................... 204
                                                                                                                                                     .
 DTC Confirmation Procedure .............................. 164            .       DTC P0122, P0123 TP SENSOR ........................... 205         .
 Wiring Diagram .................................................... 165  .        Component Description ....................................... 205 .
 Diagnostic Procedure .......................................... 166      .        CONSULT-II Reference Value in Data Monitor Mode
DTC P0011, P0021 IVT CONTROL ....................... 167                  .                                                                          .205
 Description ........................................................... 167
                                                                          .        On Board Diagnosis Logic ................................... 205  .
 CONSULT-II Reference Value in Data Monitor Mode                                   DTC Confirmation Procedure ............................... 206    .
                                                                          . 167    Wiring Diagram .................................................... 207
                                                                                                                                                     .
 On Board Diagnosis Logic ................................... 168         .        Diagnostic Procedure ........................................... 208
                                                                                                                                                     .
 DTC Confirmation Procedure .............................. 168            .        Component Inspection ......................................... 211.
 Diagnostic Procedure .......................................... 169      .        Removal and Installation ...................................... 211
                                                                                                                                                     .
 Component Inspection ......................................... 170       .       DTC P0125 ECT SENSOR ..................................... 212     .
 Removal and Installation ..................................... 171       .        Component Description ....................................... 212 .
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER 172                           .        On Board Diagnosis Logic ................................... 212  .
 Description ........................................................... 172
                                                                          .        DTC Confirmation Procedure ............................... 213    .
 CONSULT-II Reference Value in Data Monitor Mode                                   Diagnostic Procedure ........................................... 213
                                                                                                                                                     .
                                                                          . 172    Component Inspection ......................................... 214.
 On Board Diagnosis Logic ................................... 172         .        Removal and Installation ...................................... 214
                                                                                                                                                     .
 DTC Confirmation Procedure .............................. 173            .       DTC P0127 IAT SENSOR ....................................... 215   .
 Wiring Diagram .................................................... 174  .        Component Description ....................................... 215 .
 Diagnostic Procedure .......................................... 177      .        On Board Diagnosis Logic ................................... 215  .
 Component Inspection ......................................... 179       .        DTC Confirmation Procedure ............................... 215    .
 Removal and Installation ..................................... 179       .        Diagnostic Procedure ........................................... 216
                                                                                                                                                     .
DTC P0101 MAF SENSOR .................................... 180             .        Component Inspection ......................................... 217.
 Component Description ....................................... 180        .        Removal and Installation ...................................... 217
                                                                                                                                                     .
 CONSULT-II Reference Value in Data Monitor Mode                                  DTC P0128 THERMOSTAT FUNCTION ................ 218                 .
                                                                          . 180    On Board Diagnosis Logic ................................... 218  .
 On Board Diagnosis Logic ................................... 180         .        DTC Confirmation Procedure ............................... 218    .
 DTC Confirmation Procedure .............................. 181            .        Diagnostic Procedure ........................................... 218
                                                                                                                                                     .
 Overall Function Check ....................................... 182       .        Component Inspection ......................................... 219.
 Wiring Diagram .................................................... 183  .        Removal and Installation ...................................... 219
                                                                                                                                                     .
 Diagnostic Procedure .......................................... 184      .       DTC P0138, P0158 HO2S2 .................................... 220    .
 Component Inspection ......................................... 186       .        Component Description ....................................... 220 .
 Removal and Installation ..................................... 188       .        CONSULT-II Reference Value in Data Monitor Mode
DTC P0102, P0103 MAF SENSOR ........................ 189                  .                                                                          .220
 Component Description ....................................... 189        .        On Board Diagnosis Logic ................................... 220  .
 CONSULT-II Reference Value in Data Monitor Mode                                   DTC Confirmation Procedure ............................... 221    .
                                                                          . 189    Wiring Diagram .................................................... 222
                                                                                                                                                     .
 On Board Diagnosis Logic ................................... 189         .        Diagnostic Procedure ........................................... 225
                                                                                                                                                     .
 DTC Confirmation Procedure .............................. 190            .        Component Inspection ......................................... 227.
 Wiring Diagram .................................................... 191  .        Removal and Installation ...................................... 228
                                                                                                                                                     .
 Diagnostic Procedure .......................................... 192      .       DTC P0139, P0159 HO2S2 .................................... 229    .
 Component Inspection ......................................... 194       .        Component Description ....................................... 229 .
 Removal and Installation ..................................... 195       .        CONSULT-II Reference Value in Data Monitor Mode
DTC P0112, P0113 IAT SENSOR .......................... 196                .                                                                          .229
 Component Description ....................................... 196        .        On Board Diagnosis Logic ................................... 229  .
 On Board Diagnosis Logic ................................... 196         .        DTC Confirmation Procedure ............................... 230    .
 DTC Confirmation Procedure .............................. 196            .        Overall Function Check ........................................ 230
                                                                                                                                                     .
 Wiring Diagram .................................................... 197  .        Wiring Diagram .................................................... 232
                                                                                                                                                     .

Edition: 2004 September                                                      EC-2                                                   2005 G35 Coupe
  Diagnostic Procedure .......................................... 235.         DTC Confirmation Procedure .............................. 290            .
  Component Inspection ........................................ 238  .         Wiring Diagram .................................................... 292  .       A
  Removal and Installation ..................................... 239 .         Diagnostic Procedure .......................................... 293      .
DTC P0171, P0174 FUEL INJECTION SYSTEM                                         Component Inspection ......................................... 296       .
FUNCTION ............................................................. 240
                                                                     .         Removal and Installation ..................................... 296       .       EC
  On Board Diagnosis Logic .................................. 240    .       DTC P0340, P0345 CMP SENSOR (PHASE) ....... 297                            .
  DTC Confirmation Procedure .............................. 240      .         Component Description ....................................... 297        .
  Wiring Diagram ................................................... 242
                                                                     .         CONSULT-II Reference Value in Data Monitor Mode
  Diagnostic Procedure .......................................... 244.                                                                                  . 297   C
DTC P0172, P0175 FUEL INJECTION SYSTEM                                         On Board Diag nosis Logic .................................. 297         .
FUNCTION ............................................................. 250
                                                                     .         DTC Confirmation Procedure .............................. 297            .
  On Board Diagnosis Logic .................................. 250    .         Wiring Diagram .................................................... 299  .       D
  DTC Confirmation Procedure .............................. 250      .         Diagnostic Procedure .......................................... 302      .
  Wiring Diagram ................................................... 252
                                                                     .         Component Inspection ......................................... 305       .
  Diagnostic Procedure .......................................... 254.         Removal and Installation ..................................... 305       .       E
DTC P0181 FTT SENSOR ..................................... 259       .       DTC P0420, P0430 THREE WAY CATALYST FUNC-
  Component Description ....................................... 259  .       TION ....................................................................... 306
                                                                                                                                                        .
  On Board Diagnosis Logic .................................. 259    .         On Board Diagnosis Logic ................................... 306         .
  DTC Confirmation Procedure .............................. 259      .         DTC Confirmation Procedure .............................. 306            .       F
  Wiring Diagram ................................................... 261
                                                                     .         Overall Function Check ....................................... 307       .
  Diagnostic Procedure .......................................... 262.         Diagnostic Procedure .......................................... 308      .
  Component Inspection ........................................ 263  .       DTC P0441 EVAP CONTROL SYSTEM ................ 312                         .       G
  Removal and Installation ..................................... 263 .         System Description .............................................. 312    .
DTC P0182, P0183 FTT SENSOR ........................ 264             .         On Board Diagnosis Logic ................................... 312         .
  Component Description ....................................... 264  .         DTC Confirmation Procedure .............................. 312            .       H
  On Board Diagnosis Logic .................................. 264    .         Overall Function Check ....................................... 313       .
  DTC Confirmation Procedure .............................. 264      .         Diagnostic Procedure .......................................... 314      .
  Wiring Diagram ................................................... 265
                                                                     .       DTC P0442 EVAP CONTROL SYSTEM ................ 317                         .
                                                                                                                                                                 I
  Diagnostic Procedure .......................................... 266.         On Board Diagnosis Logic ................................... 317         .
  Component Inspection ........................................ 267  .         DTC Confirmation Procedure .............................. 318            .
  Removal and Installation ..................................... 267 .         Diagnostic Procedure .......................................... 319      .
DTC P0222, P0223 TP SENSOR .......................... 268            .       DTC P0444, P0445 EVAP CANISTER PURGE VOL-                                          J
  Component Description ....................................... 268  .       UME CONTROL SOLENOID VALVE ..................... 325                       .
  CONSULT-II Reference Value in Data Monitor Mode                              Description ........................................................... 325
                                                                                                                                                        .
                                                                     . 268     CONSULT-II Reference Value in Data Monitor Mode                                  K
  On Board Diagnosis Logic .................................. 268    .                                                                                  . 325
  DTC Confirmation Procedure .............................. 269      .         On Board Diagnosis Logic ................................... 326         .
  Wiring Diagram ................................................... 270
                                                                     .         DTC Confirmation Procedure .............................. 326            .       L
  Diagnostic Procedure .......................................... 271.         Wiring Diagram .................................................... 327  .
  Component Inspection ........................................ 274  .         Diagnostic Procedure .......................................... 329      .
  Removal and Installation ..................................... 274 .         Component Inspection ......................................... 330       .
DTC P0300 - P0306 MULTIPLE CYLINDER MIS-                                       Removal and Installation ..................................... 331       .       M
FIRE, NO. 1 - 6 CYLINDER MISFIRE .................... 275            .       DTC P0447 EVAP CANISTER VENT CONTROL
  On Board Diagnosis Logic .................................. 275    .       VALVE .................................................................... 332
                                                                                                                                                        .
  DTC Confirmation Procedure .............................. 275      .         Component Description ....................................... 332        .
  Diagnostic Procedure .......................................... 276.         CONSULT-II Reference Value in Data Monitor Mode
DTC P0327, P0328 KS .......................................... 285   .                                                                                  . 332
  Component Description ....................................... 285  .         On Board Diagnosis Logic ................................... 332         .
  On Board Diagnosis Logic .................................. 285    .         DTC Confirmation Procedure .............................. 333            .
  DTC Confirmation Procedure .............................. 285      .         Wiring Diagram .................................................... 334  .
  Wiring Diagram ................................................... 286
                                                                     .         Diagnostic Procedure .......................................... 335      .
  Diagnostic Procedure .......................................... 287.         Component Inspection ......................................... 337       .
  Component Inspection ........................................ 288  .       DTC P0451 EVAP CONTROL SYSTEM PRESSURE
  Removal and Installation ..................................... 289 .       SENSOR ................................................................ 339.
DTC P0335 CKP SENSOR (POS) ......................... 290             .         Component Description ....................................... 339        .
  Component Description ....................................... 290  .         CONSULT-II Reference Value in Data Monitor Mode
  CONSULT-II Reference Value in Data Monitor Mode                                                                                                       . 339
                                                                     . 290     On Board Diagnosis Logic ................................... 339         .
  On Board Diagnosis Logic .................................. 290    .         DTC Confirmation Procedure .............................. 340            .

Edition: 2004 September                                                 EC-3                                                        2005 G35 Coupe
 Diagnostic Procedure .......................................... 340   .        DTC Confirmation Procedure ............................... 381           .
 Component Inspection ......................................... 341    .        Diagnostic Procedure ........................................... 382     .
DTC P0452 EVAP CONTROL SYSTEM PRESSURE                                         DTC P0507 ISC SYSTEM ...................................... 383           .
SENSOR ................................................................. 342
                                                                       .        Description ........................................................... 383
                                                                                                                                                         .
 Component Description ....................................... 342     .        On Board Diagnosis Logic ................................... 383         .
 CONSULT-II Reference Value in Data Monitor Mode                                DTC Confirmation Procedure ............................... 383           .
                                                                       . 342    Diagnostic Procedure ........................................... 384     .
 On Board Diagnosis Logic ................................... 342      .       DTC P0550 PSP SENSOR ..................................... 385            .
 DTC Confirmation Procedure .............................. 343         .        Component Description ....................................... 385        .
 Wiring Diagram .................................................... 344
                                                                       .        CONSULT-II Reference Value in Data Monitor Mode
 Diagnostic Procedure .......................................... 345   .                                                                                 .385
 Component Inspection ......................................... 347    .        On Board Diagnosis Logic ................................... 385         .
DTC P0453 EVAP CONTROL SYSTEM PRESSURE                                          DTC Confirmation Procedure ............................... 385           .
SENSOR ................................................................. 348
                                                                       .        Wiring Diagram .................................................... 386  .
 Component Description ....................................... 348     .        Diagnostic Procedure ........................................... 387     .
 CONSULT-II Reference Value in Data Monitor Mode                                Component Inspection ......................................... 389       .
                                                                       . 348    Removal and Installation ...................................... 389      .
 On Board Diagnosis Logic ................................... 348      .       DTC P0605 ECM .................................................... 390    .
 DTC Confirmation Procedure .............................. 349         .        Component Description ....................................... 390        .
 Wiring Diagram .................................................... 350
                                                                       .        On Board Diagnosis Logic ................................... 390         .
 Diagnostic Procedure .......................................... 351   .        DTC Confirmation Procedure ............................... 390           .
 Component Inspection ......................................... 355    .        Diagnostic Procedure ........................................... 391     .
DTC P0455 EVAP CONTROL SYSTEM ................ 356                     .       DTC P1031, P1032, P1051, P1052 A/F SENSOR 1
 On Board Diagnosis Logic ................................... 356      .       HEATER .................................................................. 393
                                                                                                                                                         .
 DTC Confirmation Procedure .............................. 357         .        Description ........................................................... 393
                                                                                                                                                         .
 Diagnostic Procedure .......................................... 358   .        CONSULT-II Reference Value in Data Monitor Mode
DTC P0456 EVAP CONTROL SYSTEM ................ 364                     .                                                                                 .393
 On Board Diagnosis Logic ................................... 364      .        On Board Diagnosis Logic ................................... 393         .
 DTC Confirmation Procedure .............................. 365         .        DTC Confirmation Procedure ............................... 393           .
 Overall Function Check ....................................... 366    .        Wiring Diagram .................................................... 394  .
 Diagnostic Procedure .......................................... 366   .        Diagnostic Procedure ........................................... 397     .
DTC P0460 FUEL LEVEL SENSOR ...................... 373                 .        Component Inspection ......................................... 399       .
 Component Description ....................................... 373     .        Removal and Installation ...................................... 399      .
 On Board Diagnosis Logic ................................... 373      .       DTC P1065 ECM POWER SUPPLY ....................... 400                    .
 DTC Confirmation Procedure .............................. 373         .        Component Description ....................................... 400        .
 Diagnostic Procedure .......................................... 374   .        On Board Diagnosis Logic ................................... 400         .
 Removal and Installation ..................................... 374    .        DTC Confirmation Procedure ............................... 400           .
DTC P0461 FUEL LEVEL SENSOR ...................... 375                 .        Wiring Diagram .................................................... 401  .
 Component Description ....................................... 375     .        Diagnostic Procedure ........................................... 402     .
 On Board Diagnosis Logic ................................... 375      .       DTC P1111, P1136 IVT CONTROL SOLENOID
 Overall Function Check ....................................... 375    .       VALVE ..................................................................... 404
                                                                                                                                                         .
 Diagnostic Procedure .......................................... 376   .        Component Description ....................................... 404        .
 Removal and Installation ..................................... 376    .        CONSULT-II Reference Value in Data Monitor Mode
DTC P0462, P0463 FUEL LEVEL SENSOR ......... 377                       .                                                                                 .404
 Component Description ....................................... 377     .        On Board Diagnosis Logic ................................... 404         .
 On Board Diagnosis Logic ................................... 377      .        DTC Confirmation Procedure ............................... 404           .
 DTC Confirmation Procedure .............................. 377         .        Wiring Diagram .................................................... 405  .
 Diagnostic Procedure .......................................... 378   .        Diagnostic Procedure ........................................... 408     .
 Removal and Installation ..................................... 378    .        Component Inspection ......................................... 410       .
DTC P0500 VSS ..................................................... 379.        Removal and Installation ...................................... 410      .
 Description ........................................................... 379
                                                                       .       DTC P1121 ELECTRIC THROTTLE CONTROL
 On Board Diagnosis Logic ................................... 379      .       ACTUATOR ............................................................ 411 .
 DTC Confirmation Procedure .............................. 379         .        Component Description ....................................... 411        .
 Overall Function Check ....................................... 380    .        On Board Diagnosis Logic ................................... 411         .
 Diagnostic Procedure .......................................... 380   .        DTC Confirmation Procedure ............................... 411           .
DTC P0506 ISC SYSTEM ...................................... 381        .        Diagnostic Procedure ........................................... 412     .
 Description ........................................................... 381
                                                                       .       DTC P1122 ELECTRIC THROTTLE CONTROL
 On Board Diagnosis Logic ................................... 381      .       FUNCTION ............................................................. 413.
                                                                                Description ........................................................... 413
                                                                                                                                                         .

Edition: 2004 September                                                   EC-4                                                        2005 G35 Coupe
 On Board Diagnosis Logic .................................. 413        .        CONSULT-II Reference Value in Data Monitor Mode
 DTC Confirmation Procedure .............................. 413          .                                                                          . 455   A
 Wiring Diagram ................................................... 414 .        On Board Diagnosis Logic ................................... 455  .
 Diagnostic Procedure .......................................... 415    .        Overall Function Check ....................................... 456.
 Component Inspection ........................................ 418      .        Wiring Diagram .................................................... 458
                                                                                                                                                   .       EC
 Remove and Installation ...................................... 418     .        Diagnostic Procedure .......................................... 460
                                                                                                                                                   .
DTC P1124, P1126 THROTTLE CONTROL MOTOR                                          Main 12 Causes of Overheating .......................... 465      .
RELAY ................................................................... 419
                                                                        .        Component Inspection ......................................... 465.
 Component Description ....................................... 419      .       DTC P1225 TP SENSOR ....................................... 466    .       C
 CONSULT-II Reference Value in Data Monitor Mode                                 Component Description ....................................... 466 .
                                                                        . 419    On Board Diagnosis Logic ................................... 466  .
 On Board Diagnosis Logic .................................. 419        .        DTC Confirmation Procedure .............................. 466     .       D
 DTC Confirmation Procedure .............................. 419          .        Diagnostic Procedure .......................................... 467
                                                                                                                                                   .
 Wiring Diagram ................................................... 421 .        Removal and Installation ..................................... 467.
 Diagnostic Procedure .......................................... 422    .       DTC P1226 TP SENSOR ....................................... 468    .       E
DTC P1128 THROTTLE CONTROL MOTOR ....... 424                            .        Component Description ....................................... 468 .
 Component Description ....................................... 424      .        On Board Diagnosis Logic ................................... 468  .
 On Board Diagnosis Logic .................................. 424        .        DTC Confirmation Procedure .............................. 468     .
 DTC Confirmation Procedure .............................. 424          .        Diagnostic Procedure .......................................... 469
                                                                                                                                                   .       F
 Wiring Diagram ................................................... 425 .        Removal and Installation ..................................... 469.
 Diagnostic Procedure .......................................... 426    .       DTC P1229 SENSOR POWER SUPPLY ............... 470                  .
 Component Inspection ........................................ 427      .        On Board Diagnosis Logic ................................... 470  .       G
 Removal and Installation ..................................... 428     .        DTC Confirmation Procedure .............................. 470     .
DTC P1146, P1166 HO2S2 .................................... 429         .        Wiring Diagram .................................................... 471
                                                                                                                                                   .
 Component Description ....................................... 429      .        Diagnostic Procedure .......................................... 472
                                                                                                                                                   .       H
 CONSULT-II Reference Value in Data Monitor Mode                                DTC P1271, P1281 A/F SENSOR 1 ...................... 475           .
                                                                        . 429    Component Description ....................................... 475 .
 On Board Diagnosis Logic .................................. 429        .        CONSULT-II Reference Value in Data Monitor Mode
                                                                                                                                                            I
 DTC Confirmation Procedure .............................. 430          .                                                                          . 475
 Overall Function Check ....................................... 430     .        On Board Diagnosis Logic ................................... 475  .
 Wiring Diagram ................................................... 432 .        DTC Confirmation Procedure .............................. 475     .
 Diagnostic Procedure .......................................... 435    .        Wiring Diagram .................................................... 477
                                                                                                                                                   .       J
 Component Inspection ........................................ 438      .        Diagnostic Procedure .......................................... 480
                                                                                                                                                   .
 Removal and Installation ..................................... 439     .        Removal and Installation ..................................... 482.
DTC P1147, P1167 HO2S2 .................................... 440         .       DTC P1272, P1282 A/F SENSOR 1 ...................... 483           .       K
 Component Description ....................................... 440      .        Component Description ....................................... 483 .
 CONSULT-II Reference Value in Data Monitor Mode                                 CONSULT-II Reference Value in Data Monitor Mode
                                                                        . 440                                                                      . 483   L
 On Board Diagnosis Logic .................................. 440        .        On Board Diagnosis Logic ................................... 483  .
 DTC Confirmation Procedure .............................. 441          .        DTC Confirmation Procedure .............................. 483     .
 Overall Function Check ....................................... 441     .        Wiring Diagram .................................................... 485
                                                                                                                                                   .
 Wiring Diagram ................................................... 443 .        Diagnostic Procedure .......................................... 488
                                                                                                                                                   .       M
 Diagnostic Procedure .......................................... 446    .        Removal and Installation ..................................... 490.
 Component Inspection ........................................ 449      .       DTC P1273, P1283 A/F SENSOR 1 ...................... 491           .
 Removal and Installation ..................................... 450     .        Component Description ....................................... 491 .
DTC P1148, P1168 CLOSED LOOP CONTROL ... 451                            .        CONSULT-II Reference Value in Data Monitor Mode
 On Board Diagnosis Logic .................................. 451        .                                                                          . 491
DTC P1211 TCS CONTROL UNIT ........................ 452                 .        On Board Diagnosis Logic ................................... 491  .
 Description .......................................................... 452
                                                                        .        DTC Confirmation Procedure .............................. 491     .
 On Board Diagnosis Logic .................................. 452        .        Wiring Diagram .................................................... 493
                                                                                                                                                   .
 DTC Confirmation Procedure .............................. 452          .        Diagnostic Procedure .......................................... 496
                                                                                                                                                   .
 Diagnostic Procedure .......................................... 452    .        Removal and Installation ..................................... 499.
DTC P1212 TCS COMMUNICATION LINE ........... 453                        .       DTC P1274, P1284 A/F SENSOR 1 ...................... 500           .
 Description .......................................................... 453
                                                                        .        Component Description ....................................... 500 .
 On Board Diagnosis Logic .................................. 453        .        CONSULT-II Reference Value in Data Monitor Mode
 DTC Confirmation Procedure .............................. 453          .                                                                          . 500
 Diagnostic Procedure .......................................... 453    .        On Board Diagnosis Logic ................................... 500  .
DTC P1217 ENGINE OVER TEMPERATURE ...... 454                            .        DTC Confirmation Procedure .............................. 500     .
 Description .......................................................... 454
                                                                        .        Wiring Diagram .................................................... 502
                                                                                                                                                   .

Edition: 2004 September                                                   EC-5                                                    2005 G35 Coupe
 Diagnostic Procedure .......................................... 505     .        Diagnostic Procedure ........................................... 561  .
 Removal and Installation ..................................... 508      .        Component Inspection ......................................... 564    .
DTC P1276, P1286 A/F SENSOR 1 ....................... 509                .       DTC P1572 ASCD BRAKE SWITCH ..................... 565                  .
 Component Description ....................................... 509       .        Component Description ....................................... 565     .
 CONSULT-II Reference Value in Data Monitor Mode                                  CONSULT-II Reference Value in Data Monitor Mode
                                                                         . 509                                                                          .565
 On Board Diagnosis Logic ................................... 509        .        On Board Diagnosis Logic ................................... 565      .
 DTC Confirmation Procedure .............................. 509           .        DTC Confirmation Procedure ............................... 566        .
 Overall Function Check ....................................... 510      .        Wiring Diagram .................................................... 567
                                                                                                                                                        .
 Wiring Diagram .................................................... 512 .        Diagnostic Procedure ........................................... 569  .
 Diagnostic Procedure .......................................... 515     .        Component Inspection ......................................... 579    .
 Removal and Installation ..................................... 517      .       DTC P1574 ASCD VEHICLE SPEED SENSOR .... 580                           .
DTC P1278, P1288 A/F SENSOR 1 ....................... 518                .        Component Description ....................................... 580     .
 Component Description ....................................... 518       .        On Board Diagnosis Logic ................................... 580      .
 CONSULT-II Reference Value in Data Monitor Mode                                  DTC Confirmation Procedure ............................... 580        .
                                                                         . 518    Diagnostic Procedure ........................................... 581  .
 On Board Diagnosis Logic ................................... 518        .       DTC P1706 PNP SWITCH ...................................... 582        .
 DTC Confirmation Procedure .............................. 519           .        Component Description ....................................... 582     .
 Wiring Diagram .................................................... 521 .        CONSULT-II Reference Value in Data Monitor Mode
 Diagnostic Procedure .......................................... 524     .                                                                              .582
 Removal and Installation ..................................... 529      .        On Board Diagnosis Logic ................................... 582      .
DTC P1279, P1289 A/F SENSOR 1 ....................... 530                .        DTC Confirmation Procedure ............................... 582        .
 Component Description ....................................... 530       .        Overall Function Check ........................................ 583   .
 CONSULT-II Reference Value in Data Monitor Mode                                  Wiring Diagram .................................................... 584
                                                                                                                                                        .
                                                                         . 530    Diagnostic Procedure ........................................... 587  .
 On Board Diagnosis Logic ................................... 530        .       DTC P1805 BRAKE SWITCH ................................ 590            .
 DTC Confirmation Procedure .............................. 531           .        Description ........................................................... 590
                                                                                                                                                        .
 Wiring Diagram .................................................... 533 .        CONSULT-II Reference Value in Data Monitor Mode
 Diagnostic Procedure .......................................... 536     .                                                                              .590
 Removal and Installation ..................................... 541      .        On Board Diagnosis Logic ................................... 590      .
DTC P1444 EVAP CANISTER PURGE VOLUME                                              DTC Confirmation Procedure ............................... 590        .
CONTROL SOLENOID VALVE .............................. 542                .        Wiring Diagram .................................................... 591
                                                                                                                                                        .
 Description ........................................................... 542
                                                                         .        Diagnostic Procedure ........................................... 592  .
 CONSULT-II Reference Value in Data Monitor Mode                                  Component Inspection ......................................... 594    .
                                                                         . 542   DTC P2122, P2123 APP SENSOR ........................ 595               .
 On Board Diagnosis Logic ................................... 543        .        Component Description ....................................... 595     .
 DTC Confirmation Procedure .............................. 543           .        CONSULT-II Reference Value in Data Monitor Mode
 Wiring Diagram .................................................... 544 .                                                                              .595
 Diagnostic Procedure .......................................... 546     .        On Board Diagnosis Logic ................................... 595      .
 Component Inspection ......................................... 548      .        DTC Confirmation Procedure ............................... 596        .
 Removal and Installation ..................................... 549      .        Wiring Diagram .................................................... 597
                                                                                                                                                        .
DTC P1446 EVAP CANISTER VENT CONTROL                                              Diagnostic Procedure ........................................... 598  .
VALVE .................................................................... 550
                                                                         .        Component Inspection ......................................... 600    .
 Component Description ....................................... 550       .        Removal and Installation ...................................... 601   .
 CONSULT-II Reference Value in Data Monitor Mode                                 DTC P2127, P2128 APP SENSOR ........................ 602               .
                                                                         . 550    Component Description ....................................... 602     .
 On Board Diagnosis Logic ................................... 550        .        CONSULT-II Reference Value in Data Monitor Mode
 DTC Confirmation Procedure .............................. 551           .                                                                              .602
 Wiring Diagram .................................................... 552 .        On Board Diagnosis Logic ................................... 602      .
 Diagnostic Procedure .......................................... 553     .        DTC Confirmation Procedure ............................... 603        .
 Component Inspection ......................................... 555      .        Wiring Diagram .................................................... 604
                                                                                                                                                        .
DTC P1564 ASCD STEERING SWITCH ............... 557                       .        Diagnostic Procedure ........................................... 605  .
 Component Description ....................................... 557       .        Component Inspection ......................................... 608    .
 CONSULT-II Reference Value in Data Monitor Mode                                  Removal and Installation ...................................... 608   .
                                                                         . 557   DTC P2135 TP SENSOR ....................................... 609        .
 On Board Diagnosis Logic ................................... 557        .        Component Description ....................................... 609     .
 DTC Confirmation Procedure .............................. 558           .        CONSULT-II Reference Value in Data Monitor Mode
 Wiring Diagram .................................................... 559 .                                                                              .609
                                                                                  On Board Diagnosis Logic ................................... 609      .

Edition: 2004 September                                                     EC-6                                                      2005 G35 Coupe
  DTC Confirmation Procedure .............................. 610        .        Component Description ....................................... 650        .
  Wiring Diagram ....................................................611
                                                                       .        Wiring Diagram .................................................... 651  .       A
  Diagnostic Procedure .......................................... 612  .        Diagnostic Procedure .......................................... 652      .
  Component Inspection ........................................ 615    .        Removal and Installation ..................................... 654       .
  Removal and Installation ..................................... 615   .       ELECTRICAL LOAD SIGNAL ............................... 655                .       EC
DTC P2138 APP SENSOR .................................... 616          .        Description ........................................................... 655
                                                                                                                                                         .
  Component Description ....................................... 616    .        CONSULT-II Reference Value in Data Monitor Mode
  CONSULT-II Reference Value in Data Monitor Mode                                                                                                        . 655
                                                                       . 616    Diagnostic Procedure .......................................... 655      



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