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QRINDEX FOR DTC ...................................................... 15

Alphabetical Index .................................................. 15DTC No. Index ....................................................... 18

PRECAUTIONS ........................................................ 21Precautions for Supplemental Restraint System (SRS) AIR BAG and SEAT BELT PRE-TEN-SIONER ................................................................ 21On Board Diagnostic (OBD) System of Engine and A/T .......................................................................... 21Precaution .............................................................. 21Wiring Diagrams and Trouble Diagnosis ................ 24

PREPARATION ......................................................... 25Special Service Tools ............................................. 25Commercial Service Tools ...................................... 25

ENGINE CONTROL SYSTEM .................................. 27System Diagram ..................................................... 27Vacuum Hose Drawing ........................................... 28System Chart ......................................................... 29Multiport Fuel Injection (MFI) System .................... 30Electronic Ignition (EI) System ............................... 32Air Conditioning Cut Control ................................... 33Fuel Cut Control (at No Load and High Engine Speed) .................................................................... 33CAN communication .............................................. 34

BASIC SERVICE PROCEDURE .............................. 37Idle Speed and Ignition Timing Check .................... 37Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment ............................................................. 38Accelerator Pedal Released Position Learning ...... 48Throttle Valve Closed Position Learning ................ 48Idle Air Volume Learning ........................................ 48Fuel Pressure Check .............................................. 50

ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 53Introduction ............................................................ 53Two Trip Detection Logic ........................................ 53Emission-related Diagnostic Information ................ 54NVIS (Nissan Vehicle Immobilizer System NATS)

... 67

Malfunction Indicator Lamp (MIL) ........................... 68OBD System Operation Chart ................................ 71

TROUBLE DIAGNOSIS ............................................ 76Trouble Diagnosis Introduction ............................... 76DTC Inspection Priority Chart ................................. 80Fail-safe Chart ........................................................ 82Basic Inspection ..................................................... 83Symptom Matrix Chart ............................................ 87Engine Control Component Parts Location ............ 92Circuit Diagram ....................................................... 97ECM Harness Connector Terminal Layout ............. 99ECM Terminals and Reference Value ..................... 99CONSULT-II Function ........................................... 106Generic Scan Tool (GST) Function ....................... 118CONSULT-II Reference Value in Data Monitor ..... 120Major Sensor Reference Graph in Data Monitor Mode ..................................................................... 123

TROUBLE DIAGNOSIS - SPECIFICATION VALUE . 126Description ............................................................ 126Testing Condition .................................................. 126Inspection Procedure ............................................ 126Diagnostic Procedure ........................................... 127

TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-DENT ....................................................................... 130

Description ............................................................ 130Diagnostic Procedure ........................................... 130

POWER SUPPLY CIRCUIT FOR ECM ................... 131Wiring Diagram ..................................................... 131Diagnostic Procedure ........................................... 134

DTC U1000, U1001 CAN COMMUNICATION LINE . 138Description ............................................................ 138On Board Diagnosis Logic .................................... 138DTC Confirmation Procedure ............................... 138Wiring Diagram ..................................................... 139Diagnostic Procedure ........................................... 140

DTC P0011 IVT CONTROL ..................................... 141Description ............................................................ 141CONSULT-II Reference Value in Data Monitor Mode

. 141On Board Diagnosis Logic .................................... 142

EC-2 Revision: May 2004 2003 Altima

DTC Confirmation Procedure ............................... 142Diagnostic Procedure ........................................... 142

DTC P0031, P0032 HO2S1 HEATER ..................... 144Description ............................................................ 144CONSULT-II Reference Value in Data Monitor Mode

. 144On Board Diagnosis Logic .................................... 144DTC Confirmation Procedure ............................... 144Wiring Diagram ..................................................... 146Diagnostic Procedure ........................................... 147Component Inspection .......................................... 149Removal and Installation ...................................... 149

DTC P0037, P0038 HO2S2 HEATER ..................... 150Description ............................................................ 150CONSULT-II Reference Value in Data Monitor Mode

. 150On Board Diagnosis Logic .................................... 150DTC Confirmation Procedure ............................... 150Wiring Diagram ..................................................... 152Diagnostic Procedure ........................................... 153Component Inspection .......................................... 154Removal and Installation ...................................... 154

DTC P0101 MAF SENSOR ..................................... 155Component Description ........................................ 155CONSULT-II Reference Value in Data Monitor Mode

. 155On Board Diagnosis Logic .................................... 155DTC Confirmation Procedure ............................... 155Overall Function Check ........................................ 157Wiring Diagram ..................................................... 158Diagnostic Procedure ........................................... 159Component Inspection .......................................... 161Removal and Installation ...................................... 161

DTC P0102, P0103 MAF SENSOR ......................... 162Component Description ........................................ 162CONSULT-II Reference Value in Data Monitor Mode

. 162On Board Diagnosis Logic .................................... 162DTC Confirmation Procedure ............................... 162Wiring Diagram ..................................................... 164Diagnostic Procedure ........................................... 165Component Inspection .......................................... 167Removal and Installation ...................................... 167

DTC P0112, P0113 IAT SENSOR ........................... 168Component Description ........................................ 168On Board Diagnosis Logic .................................... 168DTC Confirmation Procedure ............................... 168Wiring Diagram ..................................................... 170Diagnostic Procedure ........................................... 171Component Inspection .......................................... 172Removal and Installation ...................................... 172

DTC P0117, P0118 ECT SENSOR .......................... 173Component Description ........................................ 173On Board Diagnosis Logic .................................... 173DTC Confirmation Procedure ............................... 174Wiring Diagram ..................................................... 175Diagnostic Procedure ........................................... 176Component Inspection .......................................... 177Removal and Installation ...................................... 177

DTC P0122, P0123 TP SENSOR ............................178Component Description ........................................178CONSULT-II Reference Value in Data Monitor Mode

.178On Board Diagnosis Logic ....................................178DTC Confirmation Procedure ................................178Wiring Diagram .....................................................180Diagnostic Procedure ............................................181Component Inspection ..........................................183Remove and Installation .......................................183

DTC P0125 ECT SENSOR ......................................184Description ............................................................184On Board Diagnosis Logic ....................................184DTC Confirmation Procedure ................................184Diagnostic Procedure ............................................185Component Inspection ..........................................185Removal and Installation .......................................186

DTC P0127 IAT SENSOR ........................................187Component Description ........................................187On Board Diagnosis Logic ....................................187DTC Confirmation Procedure ................................187Diagnostic Procedure ............................................188Component Inspection ..........................................188Removal and Installation .......................................189

DTC P0128 THERMOSTAT FUNCTION .................190On Board Diagnosis Logic ....................................190DTC Confirmation Procedure ................................190Diagnostic Procedure ............................................190Component Inspection ..........................................191Removal and Installation .......................................191

DTC P0132 HO2S1 .................................................192Component Description ........................................192CONSULT-II Reference Value in Data Monitor Mode

.192On Board Diagnosis Logic ....................................192DTC Confirmation Procedure ................................193Wiring Diagram .....................................................194Diagnostic Procedure ............................................195Component Inspection ..........................................196Removal and Installation .......................................197

DTC P0133 HO2S1 .................................................198Component Description ........................................198CONSULT-II Reference Value in Data Monitor Mode

.198On Board Diagnosis Logic ....................................198DTC Confirmation Procedure ................................199Overall Function Check .........................................200Wiring Diagram .....................................................201Diagnostic Procedure ............................................202Component Inspection ..........................................204Removal and Installation .......................................206

DTC P0134 HO2S1 .................................................207Component Description ........................................207CONSULT-II Reference Value in Data Monitor Mode

.207On Board Diagnosis Logic ....................................207DTC Confirmation Procedure ................................208Overall Function Check .........................................208Wiring Diagram .....................................................210

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Diagnostic Procedure ............................................211Component Inspection ......................................... 212Removal and Installation ...................................... 213

DTC P0138 HO2S2 ................................................. 214Component Description ........................................ 214CONSULT-II Reference Value in Data Monitor Mode

. 214On Board Diagnosis Logic ................................... 214DTC Confirmation Procedure ............................... 214Wiring Diagram .................................................... 216Diagnostic Procedure ........................................... 217Component Inspection ......................................... 218Removal and Installation ...................................... 219

DTC P0139 HO2S2 ................................................. 220Component Description ........................................ 220CONSULT-II Reference Value in Data Monitor Mode

. 220On Board Diagnosis Logic ................................... 220DTC Confirmation Procedure ............................... 221Overall Function Check ........................................ 221Wiring Diagram .................................................... 223Diagnostic Procedure ........................................... 224Component Inspection ......................................... 226Removal and Installation ...................................... 227

DTC P0171 FUEL INJECTION SYSTEM FUNCTION . 228On Board Diagnosis Logic ................................... 228DTC Confirmation Procedure ............................... 228Wiring Diagram .................................................... 230Diagnostic Procedure ........................................... 231

DTC P0172 FUEL INJECTION SYSTEM FUNCTION . 235On Board Diagnosis Logic ................................... 235DTC Confirmation Procedure ............................... 235Wiring Diagram .................................................... 237Diagnostic Procedure ........................................... 238

DTC P0181 FTT SENSOR ...................................... 241Component Description ........................................ 241On Board Diagnosis Logic ................................... 241DTC Confirmation Procedure ............................... 241Diagnostic Procedure ........................................... 242Component Inspection ......................................... 242Removal and Installation ...................................... 242

DTC P0182, P0183 FTT SENSOR ......................... 243Component Description ........................................ 243On Board Diagnosis Logic ................................... 243DTC Confirmation Procedure ............................... 243Wiring Diagram .................................................... 244Diagnostic Procedure ........................................... 245Component Inspection ......................................... 246Removal and Installation ...................................... 246

DTC P0217 COOLANT OVERTEMPERATURE ENRICHMENT PROTECTION ................................ 247

System Description .............................................. 247CONSULT-II Reference Value in Data Monitor Mode

. 247On Board Diagnosis Logic ................................... 248Overall Function Check ........................................ 248Wiring Diagram .................................................... 251Diagnostic Procedure ........................................... 252

Main 12 Causes of Overheating ........................... 257Component Inspection .......................................... 258

DTC P0222, P0223 TP SENSOR ............................ 259Component Description ........................................ 259CONSULT-II Reference Value in Data Monitor Mode

. 259On Board Diagnosis Logic .................................... 259DTC Confirmation Procedure ............................... 259Wiring Diagram ..................................................... 261Diagnostic Procedure ........................................... 262Component Inspection .......................................... 264Remove and Installation ....................................... 264

DTC P0300 - P0304 MULTIPLE CYLINDER MIS-FIRE, NO. 1 - 4 CYLINDER MISFIRE ..................... 265

On Board Diagnosis Logic .................................... 265DTC Confirmation Procedure ............................... 265Diagnostic Procedure ........................................... 266

DTC P0327, P0328 KS ........................................... 270Component Description ........................................ 270On Board Diagnosis Logic .................................... 270DTC Confirmation Procedure ............................... 270Wiring Diagram ..................................................... 271Diagnostic Procedure ........................................... 272Component Inspection .......................................... 273Removal and Installation ...................................... 273

DTC P0335 CKP SENSOR (POS) .......................... 274Component Description ........................................ 274CONSULT-II Reference Value in Data Monitor Mode

. 274On Board Diagnosis Logic .................................... 274DTC Confirmation Procedure ............................... 274Wiring Diagram ..................................................... 275Diagnostic Procedure ........................................... 276Component Inspection .......................................... 278Removal and Installation ...................................... 279

DTC P0340 CMP SENSOR (PHASE) ..................... 280Component Description ........................................ 280On Board Diagnosis Logic .................................... 280DTC Confirmation Procedure ............................... 280Wiring Diagram ..................................................... 281Diagnostic Procedure ........................................... 282Component Inspection .......................................... 284Removal and Installation ...................................... 285

DTC P0420 THREE WAY CATALYST FUNCTION . 286On Board Diagnosis Logic .................................... 286DTC Confirmation Procedure ............................... 286Overall Function Check ........................................ 287Diagnostic Procedure ........................................... 288

DTC P0441 EVAP CONTROL SYSTEM ................. 291System Description ............................................... 291On Board Diagnosis Logic .................................... 291DTC Confirmation Procedure ............................... 291Overall Function Check ........................................ 292Diagnostic Procedure ........................................... 293

DTC P0442 EVAP CONTROL SYSTEM ................. 297On Board Diagnosis Logic .................................... 297DTC Confirmation Procedure ............................... 298Diagnostic Procedure ........................................... 299

DTC P0444, P0445 EVAP CANISTER PURGE VOL-

EC-4 Revision: May 2004 2003 Altima

UME CONTROL SOLENOID VALVE ...................... 305Description ............................................................ 305CONSULT-II Reference Value in Data Monitor Mode

. 305On Board Diagnosis Logic .................................... 306DTC Confirmation Procedure ............................... 306Wiring Diagram ..................................................... 307Diagnostic Procedure ........................................... 308Component Inspection .......................................... 310Removal and Installation ...................................... 310

DTC P0447 EVAP CANISTER VENT CONTROL VALVE ..................................................................... 311

Component Description ........................................ 311CONSULT-II Reference Value in Data Monitor Mode

. 311On Board Diagnosis Logic .................................... 311DTC Confirmation Procedure ............................... 311Wiring Diagram ..................................................... 313Diagnostic Procedure ........................................... 314Component Inspection .......................................... 316

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR .................................................................. 318

Component Description ........................................ 318CONSULT-II Reference Value in Data Monitor Mode

. 318On Board Diagnosis Logic .................................... 318DTC Confirmation Procedure ............................... 318Wiring Diagram ..................................................... 320Diagnostic Procedure ........................................... 321Component Inspection .......................................... 323

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR .................................................................. 324

Component Description ........................................ 324CONSULT-II Reference Value in Data Monitor Mode

. 324On Board Diagnosis Logic .................................... 324DTC Confirmation Procedure ............................... 324Wiring Diagram ..................................................... 326Diagnostic Procedure ........................................... 327Component Inspection .......................................... 330

DTC P0455 EVAP CONTROL SYSTEM ................. 331On Board Diagnosis Logic .................................... 331DTC Confirmation Procedure ............................... 331Diagnostic Procedure ........................................... 333

DTC P0456 EVAP CONTROL SYSTEM ................. 339On Board Diagnosis Logic .................................... 339DTC Confirmation Procedure ............................... 340Overall Function Check ........................................ 341Diagnostic Procedure ........................................... 342

DTC P0460 FUEL LEVEL SENSOR ....................... 348Component Description ........................................ 348On Board Diagnosis Logic .................................... 348DTC Confirmation Procedure ............................... 348Wiring Diagram ..................................................... 349Diagnostic Procedure ........................................... 350Removal and Installation ...................................... 352

DTC P0461 FUEL LEVEL SENSOR ....................... 353Component Description ........................................ 353

On Board Diagnosis Logic ....................................353Overall Function Check .........................................353

DTC P0462, P0463 FUEL LEVEL SENSOR ...........355Component Description ........................................355On Board Diagnosis Logic ....................................355DTC Confirmation Procedure ................................355Wiring Diagram .....................................................356Diagnostic Procedure ............................................357Removal and Installation .......................................359

DTC P0500 VSS ......................................................360Description ............................................................360On Board Diagnosis Logic ....................................360DTC Confirmation Procedure ................................360Overall Function Check .........................................360Diagnostic Procedure ............................................361

DTC P0506 ISC SYSTEM .......................................362Description ............................................................362On Board Diagnosis Logic ....................................362DTC Confirmation Procedure ................................362Diagnostic Procedure ............................................363

DTC P0507 ISC SYSTEM .......................................364Description ............................................................364On Board Diagnosis Logic ....................................364DTC Confirmation Procedure ................................364Diagnostic Procedure ............................................365

DTC P0605 ECM .....................................................366Component Description ........................................366On Board Diagnosis Logic ....................................366DTC Confirmation Procedure ................................366Diagnostic Procedure ............................................367

DTC P0650 MIL .......................................................369Component Description ........................................369On Board Diagnosis Logic ....................................369DTC Confirmation Procedure ................................369Wiring Diagram .....................................................370Diagnostic Procedure ............................................371

DTC P1065 ECM POWER SUPPLY ........................373Component Description ........................................373On Board Diagnosis Logic ....................................373DTC Confirmation Procedure ................................373Wiring Diagram .....................................................374Diagnostic Procedure ............................................375

DTC P1102 MAF SENSOR .....................................377Component Description ........................................377CONSULT-II Reference Value in Data Monitor Mode

.377On Board Diagnosis Logic ....................................377DTC Confirmation Procedure ................................377Wiring Diagram .....................................................379Diagnostic Procedure ............................................380Component Inspection ..........................................382Removal and Installation .......................................382

DTC P1111 IVT CONTROL SOLENOID VALVE .....383Component Description ........................................383CONSULT-II Reference Value in Data Monitor Mode

.383On Board Diagnosis Logic ....................................383DTC Confirmation Procedure ................................383Wiring Diagram .....................................................384

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Diagnostic Procedure ........................................... 385Component Inspection ......................................... 386Removal and Installation ...................................... 386

DTC P1121 ELECTRIC THROTTLE CONTROL ACTUATOR ............................................................ 387

Component Description ........................................ 387On Board Diagnosis Logic ................................... 387DTC Confirmation Procedure ............................... 387Diagnostic Procedure ........................................... 388

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION .............................................................. 389

Description ........................................................... 389On Board Diagnosis Logic ................................... 389DTC Confirmation Procedure ............................... 389Wiring Diagram .................................................... 390Diagnostic Procedure ........................................... 391Component Inspection ......................................... 395Remove and Installation ....................................... 395

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY .................................................................... 396

Component Description ........................................ 396CONSULT-II Reference Value in Data Monitor Mode

. 396On Board Diagnosis Logic ................................... 396DTC Confirmation Procedure ............................... 396Wiring Diagram .................................................... 398Diagnostic Procedure ........................................... 399

DTC P1128 THROTTLE CONTROL MOTOR ........ 401Component Description ........................................ 401On Board Diagnosis Logic ................................... 401DTC Confirmation Procedure ............................... 401Wiring Diagram .................................................... 402Diagnostic Procedure ........................................... 403Component Inspection ......................................... 404Removal and Installation ...................................... 405

DTC P1143 HO2S1 ................................................. 406Component Description ........................................ 406CONSULT-II Reference Value in Data Monitor Mode

. 406On Board Diagnosis Logic ................................... 406DTC Confirmation Procedure ............................... 407Overall Function Check ........................................ 407Diagnostic Procedure ........................................... 408Component Inspection ......................................... 410Removal and Installation .......................................411

DTC P1144 HO2S1 ................................................. 412Component Description ........................................ 412CONSULT-II Reference Value in Data Monitor Mode

. 412On Board Diagnosis Logic ................................... 412DTC Confirmation Procedure ............................... 413Overall Function Check ........................................ 413Diagnostic Procedure ........................................... 414Component Inspection ......................................... 416Removal and Installation ...................................... 417

DTC P1146 HO2S2 ................................................. 418Component Description ........................................ 418CONSULT-II Reference Value in Data Monitor Mode

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On Board Diagnosis Logic .................................... 418DTC Confirmation Procedure ............................... 418Overall Function Check ........................................ 419Wiring Diagram ..................................................... 420Diagnostic Procedure ........................................... 421Component Inspection .......................................... 423Removal and Installation ...................................... 424

DTC P1147 HO2S2 ................................................. 425Component Description ........................................ 425CONSULT-II Reference Value in Data Monitor Mode

. 425On Board Diagnosis Logic .................................... 425DTC Confirmation Procedure ............................... 426Overall Function Check ........................................ 426Wiring Diagram ..................................................... 428Diagnostic Procedure ........................................... 429Component Inspection .......................................... 431Removal and Installation ...................................... 432

DTC P1148 CLOSED LOOP CONTROL ................ 433On Board Diagnosis Logic .................................... 433DTC Confirmation Procedure ............................... 433Overall Function Check ........................................ 433Diagnostic Procedure ........................................... 434

DTC P1217 ENGINE OVER TEMPERATURE ........ 435System Description ............................................... 435CONSULT-II Reference Value in Data Monitor Mode

. 435On Board Diagnosis Logic .................................... 436Overall Function Check ........................................ 436Wiring Diagram ..................................................... 438Diagnostic Procedure ........................................... 439Main 12 Causes of Overheating ........................... 444Component Inspection .......................................... 445

DTC P1225 TP SENSOR ........................................ 446Component Description ........................................ 446On Board Diagnosis Logic .................................... 446DTC Confirmation Procedure ............................... 446Diagnostic Procedure ........................................... 447Remove and Installation ....................................... 447

DTC P1226 TP SENSOR ........................................ 448Component Description ........................................ 448On Board Diagnosis Logic .................................... 448DTC Confirmation Procedure ............................... 448Diagnostic Procedure ........................................... 449Remove and Installation ....................................... 449

DTC P1229 SENSOR POWER SUPPLY ................ 450On Board Diagnosis Logic .................................... 450DTC Confirmation Procedure ............................... 450Wiring Diagram ..................................................... 451Diagnostic Procedure ........................................... 452

DTC P1442 EVAP CONTROL SYSTEM ................. 454On Board Diagnosis Logic .................................... 454DTC Confirmation Procedure ............................... 455Diagnostic Procedure ........................................... 455

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE ............................... 456

Description ............................................................ 456CONSULT-II Reference Value in Data Monitor Mode

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EC-6 Revision: May 2004 2003 Altima

On Board Diagnosis Logic .................................... 457DTC Confirmation Procedure ............................... 457Wiring Diagram ..................................................... 458Diagnostic Procedure ........................................... 459Component Inspection .......................................... 463Removal and Installation ...................................... 463

DTC P1446 EVAP CANISTER VENT CONTROL VALVE ..................................................................... 464

Component Description ........................................ 464CONSULT-II Reference Value in Data Monitor Mode

. 464On Board Diagnosis Logic .................................... 464DTC Confirmation Procedure ............................... 464Wiring Diagram ..................................................... 466Diagnostic Procedure ........................................... 467Component Inspection .......................................... 469

DTC P1448 EVAP CANISTER VENT CONTROL VALVE ..................................................................... 470

Component Description ........................................ 470CONSULT-II Reference Value in Data Monitor Mode

. 470On Board Diagnosis Logic .................................... 470DTC Confirmation Procedure ............................... 470Overall Function Check ........................................ 472Wiring Diagram ..................................................... 473Diagnostic Procedure ........................................... 474Component Inspection .......................................... 476

DTC P1456 EVAP CONTROL SYSTEM ................. 478On Board Diagnosis Logic .................................... 478DTC Confirmation Procedure ............................... 479Overall Function Check ........................................ 480Diagnostic Procedure ........................................... 481

DTC P1464 FUEL LEVEL SENSOR ....................... 487Component Description ........................................ 487On Board Diagnosis Logic .................................... 487DTC Confirmation Procedure ............................... 487Wiring Diagram ..................................................... 488Diagnostic Procedure ........................................... 489Removal and Installation ...................................... 489

DTC P1490 VACUUM CUT VALVE BYPASS VALVE . 490Description ............................................................ 490CONSULT-II Reference Value in Data Monitor Mode

. 490On Board Diagnosis Logic .................................... 490DTC Confirmation Procedure ............................... 490Wiring Diagram ..................................................... 492Diagnostic Procedure ........................................... 493Component Inspection .......................................... 495

DTC P1491 VACUUM CUT VALVE BYPASS VALVE . 497Description ............................................................ 497CONSULT-II Reference Value in Data Monitor Mode

. 497On Board Diagnosis Logic .................................... 497DTC Confirmation Procedure ............................... 498Overall Function Check ........................................ 498Wiring Diagram ..................................................... 500Diagnostic Procedure ........................................... 501Component Inspection .......................................... 504

DTC P1564 ASCD STEERING SWITCH ................506Component Description ........................................506CONSULT-II Reference Value in Data Monitor Mode

.506On Board Diagnosis Logic ....................................506DTC Confirmation Procedure ................................506Wiring Diagram .....................................................508Diagnostic Procedure ............................................510Component Inspection .......................................... 511

DTC P1572 ASCD BRAKE SWITCH ......................513Component Description ........................................513CONSULT-II Reference Value in Data Monitor Mode

.513On Board Diagnosis Logic ....................................513DTC Confirmation Procedure ................................513Wiring Diagram .....................................................515Diagnostic Procedure ............................................516Component Inspection ..........................................521

DTC P1574 ASCD VEHICLE SPEED SENSOR .....523Component Description ........................................523On Board Diagnosis Logic ....................................523DTC Confirmation Procedure ................................523Diagnostic Procedure ............................................524

DTC P1706 PNP SWITCH .......................................525Component Description ........................................525CONSULT-II Reference Value in Data Monitor Mode

.525On Board Diagnosis Logic ....................................525DTC Confirmation Procedure ................................525Overall Function Check .........................................526Wiring Diagram .....................................................527Diagnostic Procedure ............................................528

DTC P1805 BRAKE SWITCH .................................529Description ............................................................529CONSULT-II Reference Value in Data Monitor Mode

.529On Board Diagnosis Logic ....................................529DTC Confirmation Procedure ................................529Wiring Diagram .....................................................530Diagnostic Procedure ............................................531Component Inspection ..........................................533

DTC P2122, P2123 APP SENSOR .........................534Component Description ........................................534CONSULT-II Reference Value in Data Monitor Mode

.534On Board Diagnosis Logic ....................................534DTC Confirmation Procedure ................................534Wiring Diagram .....................................................536Diagnostic Procedure ............................................537Component Inspection ..........................................539Removal and Installation .......................................539

DTC P2127, P2128 APP SENSOR .........................540Component Description ........................................540CONSULT-II Reference Value in Data Monitor Mode

.540On Board Diagnosis Logic ....................................540DTC Confirmation Procedure ................................540Wiring Diagram .....................................................542Diagnostic Procedure ............................................543

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Component Inspection ......................................... 545Remove and Installation ....................................... 545

DTC P2135 TP SENSOR ........................................ 546Component Description ........................................ 546CONSULT-II Reference Value in Data Monitor Mode

. 546On Board Diagnosis Logic ................................... 546DTC Confirmation Procedure ............................... 546Wiring Diagram .................................................... 548Diagnostic Procedure ........................................... 549Component Inspection ......................................... 551Remove and Installation ....................................... 552

DTC P2138 APP SENSOR ..................................... 553Component Description ........................................ 553CONSULT-II Reference Value in Data Monitor Mode

. 553On Board Diagnosis Logic ................................... 553DTC Confirmation Procedure ............................... 553Wiring Diagram .................................................... 555Diagnostic Procedure ........................................... 556Component Inspection ......................................... 558Remove and Installation ....................................... 558

IGNITION SIGNAL .................................................. 559Component Description ........................................ 559Wiring Diagram .................................................... 560Diagnostic Procedure ........................................... 565Component Inspection ......................................... 568Removal and Installation ...................................... 569

VIAS ........................................................................ 570Description ........................................................... 570CONSULT-II Reference Value in Data Monitor Mode

. 571Wiring Diagram .................................................... 572Diagnostic Procedure ........................................... 574Component Inspection ......................................... 577Removal and Installation ...................................... 578

INJECTOR CIRCUIT ............................................... 579Component Description ........................................ 579CONSULT-II Reference Value in Data Monitor Mode

. 579Wiring Diagram .................................................... 580Diagnostic Procedure ........................................... 581Component Inspection ......................................... 584Removal and Installation ...................................... 584

START SIGNAL ...................................................... 585CONSULT-II Reference Value in Data Monitor Mode

. 585Wiring Diagram .................................................... 586Diagnostic Procedure ........................................... 587

FUEL PUMP CIRCUIT ............................................ 589Description ........................................................... 589CONSULT-II Reference Value in Data Monitor Mode

. 589Wiring Diagram .................................................... 590Diagnostic Procedure ........................................... 591Component Inspection ......................................... 594Removal and Installation ...................................... 595

POWER STEERING OIL PRESSURE SWITCH .... 596Component Description ........................................ 596

CONSULT-II Reference Value in Data Monitor Mode . 596

Wiring Diagram ..................................................... 597Diagnostic Procedure ........................................... 598Component Inspection .......................................... 599Removal and Installation ...................................... 599

REFRIGERANT PRESSURE SENSOR .................. 600Component Description ........................................ 600Wiring Diagram ..................................................... 601Diagnostic Procedure ........................................... 602Removal and Installation ...................................... 604

ELECTRICAL LOAD SIGNAL ................................ 605Description ............................................................ 605Diagnostic Procedure ........................................... 605

ASCD BRAKE SWITCH ......................................... 606Component Description ........................................ 606CONSULT-II Reference Value in Data Monitor Mode

. 606Wiring Diagram ..................................................... 607Diagnostic Procedure ........................................... 608

ASCD INDICATOR .................................................. 614Component Description ........................................ 614CONSULT-II Reference Value in Data Monitor Mode

. 614Wiring Diagram ..................................................... 615Diagnostic Procedure ........................................... 616

DATA LINK CONNECTOR ...................................... 617Wiring Diagram ..................................................... 617

EVAPORATIVE EMISSION SYSTEM ..................... 618Description ............................................................ 618Component Inspection .......................................... 621How to Detect Fuel Vapor Leakage ...................... 622

ON BOARD REFUELING VAPOR RECOVERY (ORVR) .................................................................... 624

System Description ............................................... 624Diagnostic Procedure ........................................... 625Component Inspection .......................................... 627

POSITIVE CRANKCASE VENTILATION ............... 630Description ............................................................ 630Component Inspection .......................................... 630

AUTOMATIC SPEED CONTROL DEVICE (ASCD) . 632System Description ............................................... 632Component Description ........................................ 633

SERVICE DATA AND SPECIFICATIONS (SDS) .... 634Fuel Pressure ....................................................... 634Idle Speed and Ignition Timing ............................. 634Calculated Load Value .......................................... 634Mass Air Flow Sensor ........................................... 634Intake Air Temperature Sensor ............................. 634Engine Coolant Temperature Sensor ................... 634Heated Oxygen Sensor 1 Heater ......................... 634Heated Oxygen sensor 2 Heater .......................... 634Crankshaft Position Sensor (POS) ....................... 634Camshaft Position Sensor (PHASE) .................... 634Throttle Control Motor ........................................... 635Injector .................................................................. 635Fuel Pump ............................................................ 635

EC-8 Revision: May 2004 2003 Altima

VQINDEX FOR DTC ..................................................... 636

Alphabetical Index ................................................ 636DTC No. Index ...................................................... 639

PRECAUTIONS ....................................................... 644Precautions for Supplemental Restraint System (SRS) AIR BAG and SEAT BELT PRE-TEN-SIONER ............................................................... 644On Board Diagnostic (OBD) System of Engine and A/T ........................................................................ 644Precaution ............................................................ 644Wiring Diagrams and Trouble Diagnosis .............. 647

PREPARATION ....................................................... 648Special Service Tools ........................................... 648Commercial Service Tools .................................... 648

ENGINE CONTROL SYSTEM ................................ 650System Diagram ................................................... 650Vacuum Hose Drawing ......................................... 651System Chart ........................................................ 652Multiport Fuel Injection (MFI) System ................... 653Electronic Ignition (EI) System ............................. 655Air Conditioning Cut Control ................................. 656Fuel Cut Control (at No Load and High Engine Speed) .................................................................. 656CAN communication ............................................. 657

BASIC SERVICE PROCEDURE ............................. 661Idle Speed and Ignition Timing Check .................. 661Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment ............................................................ 662Accelerator Pedal Released Position Learning .... 672Throttle Valve Closed Position Learning ............... 673Idle Air Volume Learning ...................................... 673Fuel Pressure Check ............................................ 675

ON BOARD DIAGNOSTIC (OBD) SYSTEM .......... 677Introduction ........................................................... 677Two Trip Detection Logic ...................................... 677Emission-related Diagnostic Information .............. 678NVIS (Nissan Vehicle Immobilizer System NATS)

. 693Malfunction Indicator Lamp (MIL) ......................... 693OBD System Operation Chart .............................. 697

TROUBLE DIAGNOSIS .......................................... 702Trouble Diagnosis Introduction ............................. 702DTC Inspection Priority Chart ............................... 705Fail-safe Chart ...................................................... 707Basic Inspection ................................................... 708Symptom Matrix Chart .......................................... 713Engine Control Component Parts Location .......... 717Circuit Diagram ..................................................... 725ECM Harness Connector Terminal Layout ........... 727ECM Terminals and Reference Value ................... 727CONSULT-II Function ........................................... 736Generic Scan Tool (GST) Function ....................... 749CONSULT-II Reference Value in Data Monitor ..... 752Major Sensor Reference Graph in Data Monitor Mode ..................................................................... 755

TROUBLE DIAGNOSIS - SPECIFICATION VALUE . 758Description ............................................................ 758

Testing Condition ..................................................758Inspection Procedure ............................................758Diagnostic Procedure ............................................759

TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-DENT .......................................................................762

Description ............................................................762Diagnostic Procedure ............................................762

POWER SUPPLY CIRCUIT FOR ECM ...................763Wiring Diagram .....................................................763Diagnostic Procedure ............................................764

DTC U1000, U1001 CAN COMMUNICATION LINE .768Description ............................................................768On Board Diagnosis Logic ....................................768DTC Confirmation Procedure ................................768Wiring Diagram .....................................................769Diagnostic Procedure ............................................770

DTC P0011, P0021 IVT CONTROL .........................771Description ............................................................771CONSULT-II Reference Value in Data Monitor Mode

.771On Board Diagnosis Logic ....................................772DTC Confirmation Procedure ................................772Wiring Diagram .....................................................773Diagnostic Procedure ............................................776Component Inspection ..........................................778Removal and Installation .......................................778

DTC P0031, P0032, P0051, P0052 HO2S1 HEATER .779Description ............................................................779CONSULT-II Reference Value in Data Monitor Mode

.779On Board Diagnosis Logic ....................................779DTC Confirmation Procedure ................................779Wiring Diagram .....................................................781Diagnostic Procedure ............................................785Component Inspection ..........................................786Removal and Installation .......................................786

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER .787Description ............................................................787CONSULT-II Reference Value in Data Monitor Mode

.787On Board Diagnosis Logic ....................................787DTC Confirmation Procedure ................................787Wiring Diagram .....................................................789Diagnostic Procedure ............................................793Component Inspection ..........................................794Removal and Installation .......................................795

DTC P0101 MAF SENSOR .....................................796Component Description ........................................796CONSULT-II Reference Value in Data Monitor Mode

.796On Board Diagnosis Logic ....................................796DTC Confirmation Procedure ................................796Overall Function Check .........................................798Wiring Diagram .....................................................799Diagnostic Procedure ............................................800Component Inspection ..........................................802Removal and Installation .......................................803

DTC P0102, P0103 MAF SENSOR .........................804Component Description ........................................804

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CONSULT-II Reference Value in Data Monitor Mode . 804

On Board Diagnosis Logic ................................... 804DTC Confirmation Procedure ............................... 804Wiring Diagram .................................................... 806Diagnostic Procedure ........................................... 807Component Inspection ......................................... 809Removal and Installation ...................................... 809

DTC P0107, P0108 ABSOLUTE PRESSURE SEN-SOR ........................................................................ 810

Component Description ........................................ 810On Board Diagnosis Logic ................................... 810DTC Confirmation Procedure ............................... 810Diagnostic Procedure ............................................811

DTC P0112, P0113 IAT SENSOR ........................... 812Component Description ........................................ 812On Board Diagnosis Logic ................................... 812DTC Confirmation Procedure ............................... 812Wiring Diagram .................................................... 814Diagnostic Procedure ........................................... 815Component Inspection ......................................... 816Removal and Installation ...................................... 816

DTC P0117, P0118 ECT SENSOR ......................... 817Component Description ........................................ 817On Board Diagnosis Logic ................................... 817DTC Confirmation Procedure ............................... 818Wiring Diagram .................................................... 819Diagnostic Procedure ........................................... 820Component Inspection ......................................... 821Removal and Installation ...................................... 821

DTC P0122, P0123 TP SENSOR ........................... 822Component Description ........................................ 822CONSULT-II Reference Value in Data Monitor Mode

. 822On Board Diagnosis Logic ................................... 822DTC Confirmation Procedure ............................... 822Wiring Diagram .................................................... 824Diagnostic Procedure ........................................... 825Component Inspection ......................................... 827Removal and Installation ...................................... 827

DTC P0125 ECT SENSOR ..................................... 828Component Description ........................................ 828On Board Diagnosis Logic ................................... 828DTC Confirmation Procedure ............................... 828Wiring Diagram .................................................... 830Diagnostic Procedure ........................................... 831Component Inspection ......................................... 831Removal and Installation ...................................... 831

DTC P0127 IAT SENSOR ....................................... 832Component Description ........................................ 832On Board Diagnosis Logic ................................... 832DTC Confirmation Procedure ............................... 832Wiring Diagram .................................................... 834Diagnostic Procedure ........................................... 835Component Inspection ......................................... 836Removal and Installation ...................................... 836

DTC P0128 THERMOSTAT FUNCTION ................ 837On Board Diagnosis Logic ................................... 837DTC Confirmation Procedure ............................... 837

Diagnostic Procedure ........................................... 837Component Inspection .......................................... 838Removal and Installation ...................................... 838

DTC P0132, P0152 HO2S1 ..................................... 839Component Description ........................................ 839CONSULT-II Reference Value in Data Monitor Mode

. 839On Board Diagnosis Logic .................................... 839DTC Confirmation Procedure ............................... 840Wiring Diagram ..................................................... 841Diagnostic Procedure ........................................... 844Component Inspection .......................................... 846Removal and Installation ...................................... 847

DTC P0133, P0153 HO2S1 ..................................... 848Component Description ........................................ 848CONSULT-II Reference Value in Data Monitor Mode

. 848On Board Diagnosis Logic .................................... 848DTC Confirmation Procedure ............................... 849Overall Function Check ........................................ 850Wiring Diagram ..................................................... 851Diagnostic Procedure ........................................... 854Component Inspection .......................................... 858Removal and Installation ...................................... 859

DTC P0134, P0154 HO2S1 ..................................... 860Component Description ........................................ 860CONSULT-II Reference Value in Data Monitor Mode

. 860On Board Diagnosis Logic .................................... 860DTC Confirmation Procedure ............................... 861Overall Function Check ........................................ 861Wiring Diagram ..................................................... 863Diagnostic Procedure ........................................... 866Component Inspection .......................................... 868Removal and Installation ...................................... 869

DTC P0138, P0158 HO2S2 ..................................... 870Component Description ........................................ 870CONSULT-II Reference Value in Data Monitor Mode

. 870On Board Diagnosis Logic .................................... 870DTC Confirmation Procedure ............................... 870Wiring Diagram ..................................................... 872Diagnostic Procedure ........................................... 875Component Inspection .......................................... 878Removal and Installation ...................................... 880

DTC P0139, P0159 HO2S2 ..................................... 881Component Description ........................................ 881CONSULT-II Reference Value in Data Monitor Mode

. 881On Board Diagnosis Logic .................................... 881DTC Confirmation Procedure ............................... 881Overall Function Check ........................................ 882Wiring Diagram ..................................................... 883Diagnostic Procedure ........................................... 886Component Inspection .......................................... 889Removal and Installation ...................................... 891

DTC P0171, P0174 FUEL INJECTION SYSTEM FUNCTION .............................................................. 892

On Board Diagnosis Logic .................................... 892

EC-10 Revision: May 2004 2003 Altima

DTC Confirmation Procedure ............................... 892Wiring Diagram ..................................................... 894Diagnostic Procedure ........................................... 896

DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION .............................................................. 900

On Board Diagnosis Logic .................................... 900DTC Confirmation Procedure ............................... 900Wiring Diagram ..................................................... 902Diagnostic Procedure ........................................... 904

DTC P0181 FTT SENSOR ...................................... 907Component Description ........................................ 907On Board Diagnosis Logic .................................... 907DTC Confirmation Procedure ............................... 907Wiring Diagram ..................................................... 909Diagnostic Procedure ........................................... 910Component Inspection .......................................... 911Removal and Installation ...................................... 911

DTC P0182, P0183 FTT SENSOR .......................... 912Component Description ........................................ 912On Board Diagnosis Logic .................................... 912DTC Confirmation Procedure ............................... 912Wiring Diagram ..................................................... 913Diagnostic Procedure ........................................... 914Component Inspection .......................................... 915Removal and Installation ...................................... 915

DTC P0222, P0223 TP SENSOR ............................ 916Component Description ........................................ 916CONSULT-II Reference Value in Data Monitor Mode

. 916On Board Diagnosis Logic .................................... 916DTC Confirmation Procedure ............................... 916Wiring Diagram ..................................................... 918Diagnostic Procedure ........................................... 919Component Inspection .......................................... 921Removal and Installation ...................................... 921

DTC P0300 - P0306 MULTIPLE CYLINDER MIS-FIRE, NO. 1 - 6 CYLINDER MISFIRE ..................... 922

On Board Diagnosis Logic .................................... 922DTC Confirmation Procedure ............................... 922Diagnostic Procedure ........................................... 923

DTC P0327, P0328 KS ............................................ 928Component Description ........................................ 928On Board Diagnosis Logic .................................... 928DTC Confirmation Procedure ............................... 928Wiring Diagram ..................................................... 929Diagnostic Procedure ........................................... 930Component Inspection .......................................... 931Removal and Installation ...................................... 931

DTC P0335 CKP SENSOR (POS) .......................... 932Component Description ........................................ 932CONSULT-II Reference Value in Data Monitor Mode

. 932On Board Diagnosis Logic .................................... 932DTC Confirmation Procedure ............................... 932Wiring Diagram ..................................................... 933Diagnostic Procedure ........................................... 934Component Inspection .......................................... 936Removal and Installation ...................................... 937

DTC P0340, P0345 CMP SENSOR (PHASE) .........938Component Description ........................................938On Board Diagnosis Logic ....................................938DTC Confirmation Procedure ................................938Wiring Diagram .....................................................939Diagnostic Procedure ............................................942Component Inspection ..........................................944Removal and Installation .......................................945

DTC P0420, P0430 THREE WAY CATALYST FUNC-TION ........................................................................946

On Board Diagnosis Logic ....................................946DTC Confirmation Procedure ................................946Overall Function Check .........................................947Diagnostic Procedure ............................................947

DTC P0441 EVAP CONTROL SYSTEM .................950System Description ...............................................950On Board Diagnosis Logic ....................................950DTC Confirmation Procedure ................................950Overall Function Check .........................................951Diagnostic Procedure ............................................952

DTC P0442 EVAP CONTROL SYSTEM .................956On Board Diagnosis Logic ....................................956DTC Confirmation Procedure ................................957Diagnostic Procedure ............................................958

DTC P0444, P0445 EVAP CANISTER PURGE VOL-UME CONTROL SOLENOID VALVE ......................964

Description ............................................................964CONSULT-II Reference Value in Data Monitor Mode

.964On Board Diagnosis Logic ....................................965DTC Confirmation Procedure ................................965Wiring Diagram .....................................................966Diagnostic Procedure ............................................967Component Inspection ..........................................969Removal and Installation .......................................969

DTC P0447 EVAP CANISTER VENT CONTROL VALVE ......................................................................970

Component Description ........................................970CONSULT-II Reference Value in Data Monitor Mode

.970On Board Diagnosis Logic ....................................970DTC Confirmation Procedure ................................970Wiring Diagram .....................................................972Diagnostic Procedure ............................................973Component Inspection ..........................................975

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR ..................................................................977

Component Description ........................................977CONSULT-II Reference Value in Data Monitor Mode

.977On Board Diagnosis Logic ....................................977DTC Confirmation Procedure ................................977Wiring Diagram .....................................................979Diagnostic Procedure ............................................980Component Inspection ..........................................982

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR ..................................................................983

Component Description ........................................983CONSULT-II Reference Value in Data Monitor Mode

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. 983On Board Diagnosis Logic ................................... 983DTC Confirmation Procedure ............................... 983Wiring Diagram .................................................... 985Diagnostic Procedure ........................................... 986Component Inspection ......................................... 989

DTC P0455 EVAP CONTROL SYSTEM ................ 990On Board Diagnosis Logic ................................... 990DTC Confirmation Procedure ............................... 990Diagnostic Procedure ........................................... 992

DTC P0456 EVAP CONTROL SYSTEM ................ 998On Board Diagnosis Logic ................................... 998DTC Confirmation Procedure ............................... 999Overall Function Check ........................................ 999Diagnostic Procedure ..........................................1000

DTC P0460 FUEL LEVEL SENSOR .....................1006Component Description .......................................1006On Board Diagnosis Logic ..................................1006DTC Confirmation Procedure ..............................1006Wiring Diagram ...................................................1007Diagnostic Procedure ..........................................1008Removal and Installation .....................................1010

DTC P0461 FUEL LEVEL SENSOR .....................1011Component Description .......................................1011On Board Diagnosis Logic ..................................1011Overall Function Check .......................................1011

DTC P0462, P0463 FUEL LEVEL SENSOR .........1013Component Description .......................................1013On Board Diagnosis Logic ..................................1013DTC Confirmation Procedure ..............................1013Wiring Diagram ...................................................1014Diagnostic Procedure ..........................................1015Removal and Installation .....................................1017

DTC P0500 VSS ....................................................1018Description ..........................................................1018On Board Diagnosis Logic ..................................1018DTC Confirmation Procedure ..............................1018Overall Function Check .......................................1018Diagnostic Procedure ..........................................1019

DTC P0506 ISC SYSTEM ......................................1020Description ..........................................................1020On Board Diagnosis Logic ..................................1020DTC Confirmation Procedure ..............................1020Diagnostic Procedure ..........................................1021

DTC P0507 ISC SYSTEM ......................................1022Description ..........................................................1022On Board Diagnosis Logic ..................................1022DTC Confirmation Procedure ..............................1022Diagnostic Procedure ..........................................1023

DTC P0550 PSP SENSOR ....................................1024Component Description .......................................1024CONSULT-II Reference Value in Data Monitor Mode

1024On Board Diagnosis Logic ..................................1024DTC Confirmation Procedure ..............................1024Wiring Diagram ...................................................1025Diagnostic Procedure ..........................................1026Component Inspection ........................................1027

DTC P0605 ECM ....................................................1029Component Description .......................................1029On Board Diagnosis Logic ...................................1029DTC Confirmation Procedure ..............................1029Diagnostic Procedure ..........................................1030

DTC P0650 MIL ......................................................1032Component Description .......................................1032On Board Diagnosis Logic ...................................1032DTC Confirmation Procedure ..............................1032Wiring Diagram ....................................................1033Diagnostic Procedure ..........................................1034

DTC P1065 ECM POWER SUPPLY ......................1036Component Description .......................................1036On Board Diagnosis Logic ...................................1036DTC Confirmation Procedure ..............................1036Wiring Diagram ....................................................1037Diagnostic Procedure ..........................................1038

DTC P1102 MAF SENSOR ....................................1040Component Description .......................................1040CONSULT-II Reference Value in Data Monitor Mode

1040On Board Diagnosis Logic ...................................1040DTC Confirmation Procedure ..............................1040Wiring Diagram ....................................................1042Diagnostic Procedure ..........................................1043Component Inspection .........................................1045Removal and Installation .....................................1045

DTC P1121 ELECTRIC THROTTLE CONTROL ACTUATOR ............................................................1046

Component Description .......................................1046On Board Diagnosis Logic ...................................1046DTC Confirmation Procedure ..............................1046Diagnostic Procedure ..........................................1047

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION .............................................................1048

Description ...........................................................1048On Board Diagnosis Logic ...................................1048DTC Confirmation Procedure ..............................1048Wiring Diagram ....................................................1049Diagnostic Procedure ..........................................1050Component Inspection .........................................1054Remove and Installation ......................................1054

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY ....................................................................1055

Component Description .......................................1055CONSULT-II Reference Value in Data Monitor Mode

1055On Board Diagnosis Logic ...................................1055DTC Confirmation Procedure ..............................1055Wiring Diagram ....................................................1057Diagnostic Procedure ..........................................1058

DTC P1128 THROTTLE CONTROL MOTOR ........1060Component Description .......................................1060On Board Diagnosis Logic ...................................1060DTC Confirmation Procedure ..............................1060Wiring Diagram ....................................................1061Diagnostic Procedure ..........................................1062Component Inspection .........................................1063Removal and Installation .....................................1064

EC-12 Revision: May 2004 2003 Altima

DTC P1143, P1163 HO2S1 ....................................1065Component Description .......................................1065CONSULT-II Reference Value in Data Monitor Mode

1065On Board Diagnosis Logic ...................................1065DTC Confirmation Procedure ..............................1066Overall Function Check .......................................1066Diagnostic Procedure ..........................................1067Component Inspection .........................................1069Removal and Installation .....................................1070

DTC P1144, P1164 HO2S1 ....................................1071Component Description .......................................1071CONSULT-II Reference Value in Data Monitor Mode

1071On Board Diagnosis Logic ...................................1071DTC Confirmation Procedure ..............................1072Overall Function Check .......................................1072Diagnostic Procedure ..........................................1073Component Inspection .........................................1076Removal and Installation .....................................1077

DTC P1146, P1166 HO2S2 ....................................1078Component Description .......................................1078CONSULT-II Reference Value in Data Monitor Mode

1078On Board Diagnosis Logic ...................................1078DTC Confirmation Procedure ..............................1078Overall Function Check .......................................1079Wiring Diagram ....................................................1080Diagnostic Procedure ..........................................1083Component Inspection .........................................1086Removal and Installation .....................................1088

DTC P1147, P1167 HO2S2 ....................................1089Component Description .......................................1089CONSULT-II Reference Value in Data Monitor Mode

1089On Board Diagnosis Logic ...................................1089DTC Confirmation Procedure ..............................1089Overall Function Check .......................................1090Wiring Diagram ....................................................1091Diagnostic Procedure ..........................................1094Component Inspection .........................................1097Removal and Installation .....................................1099

DTC P1148, P1168 CLOSED LOOP CONTROL ...1100On Board Diagnosis Logic ...................................1100DTC Confirmation Procedure ..............................1100Overall Function Check .......................................1100Diagnostic Procedure ..........................................1101

DTC P1211 ABS/TCS CONTROL UNIT ................1102Description ...........................................................1102On Board Diagnosis Logic ...................................1102DTC Confirmation Procedure ..............................1102Diagnostic Procedure ..........................................1102

DTC P1212 ABS/TCS COMMUNICATION LINE ...1103Description ...........................................................1103On Board Diagnosis Logic ...................................1103DTC Confirmation Procedure ..............................1103Diagnostic Procedure ..........................................1103

DTC P1217 ENGINE OVER TEMPERATURE .......1104System Description ..............................................1104

CONSULT-II Reference Value in Data Monitor Mode 1104

On Board Diagnosis Logic ...................................1105Overall Function Check ........................................1105Wiring Diagram ....................................................1107Diagnostic Procedure ...........................................1108Main 12 Causes of Overheating ..........................1114Component Inspection .........................................1114

DTC P1225 TP SENSOR .......................................1115Component Description .......................................1115On Board Diagnosis Logic ...................................1115DTC Confirmation Procedure ...............................1115Diagnostic Procedure ...........................................1116Removal and Installation ......................................1116

DTC P1226 TP SENSOR .......................................1117Component Description .......................................1117On Board Diagnosis Logic ...................................1117DTC Confirmation Procedure ...............................1117Diagnostic Procedure ...........................................1118Removal and Installation ......................................1118

DTC P1229 SENSOR POWER SUPPLY ...............1119On Board Diagnosis Logic ...................................1119DTC Confirmation Procedure ...............................1119Wiring Diagram ....................................................1120Diagnostic Procedure ...........................................1121

DTC P1442 EVAP CONTROL SYSTEM ................1123On Board Diagnosis Logic ...................................1123DTC Confirmation Procedure ...............................1124Diagnostic Procedure ...........................................1124

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE ..............................1125

Description ...........................................................1125CONSULT-II Reference Value in Data Monitor Mode

1125On Board Diagnosis Logic ...................................1126DTC Confirmation Procedure ...............................1126Wiring Diagram ....................................................1127Diagnostic Procedure ...........................................1128Component Inspection .........................................1131Removal and Installation ......................................1132

DTC P1446 EVAP CANISTER VENT CONTROL VALVE .....................................................................1133

Component Description .......................................1133CONSULT-II Reference Value in Data Monitor Mode

1133On Board Diagnosis Logic ...................................1133DTC Confirmation Procedure ...............................1133Wiring Diagram ....................................................1135Diagnostic Procedure ...........................................1136Component Inspection .........................................1137

DTC P1448 EVAP CANISTER VENT CONTROL VALVE .....................................................................1139

Component Description .......................................1139CONSULT-II Reference Value in Data Monitor Mode

1139On Board Diagnosis Logic ...................................1139DTC Confirmation Procedure ...............................1139Overall Function Check ........................................1141Wiring Diagram ....................................................1142

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Diagnostic Procedure ..........................................1143Component Inspection ........................................1145

DTC P1456 EVAP CONTROL SYSTEM ...............1147On Board Diagnosis Logic ..................................1147DTC Confirmation Procedure ..............................1148Overall Function Check .......................................1148Diagnostic Procedure ..........................................1149

DTC P1464 FUEL LEVEL SENSOR .....................1155Component Description .......................................1155On Board Diagnosis Logic ..................................1155DTC Confirmation Procedure ..............................1155Wiring Diagram ...................................................1156Diagnostic Procedure ..........................................1157Removal and Installation .....................................1157

DTC P1490 VACUUM CUT VALVE BYPASS VALVE 1158Description ..........................................................1158CONSULT-II Reference Value in Data Monitor Mode

1158On Board Diagnosis Logic ..................................1158DTC Confirmation Procedure ..............................1158Wiring Diagram ...................................................1160Diagnostic Procedure ..........................................1161Component Inspection ........................................1163

DTC P1491 VACUUM CUT VALVE BYPASS VALVE 1164Description ..........................................................1164CONSULT-II Reference Value in Data Monitor Mode

1164On Board Diagnosis Logic ..................................1164DTC Confirmation Procedure ..............................1165Overall Function Check .......................................1165Wiring Diagram ...................................................1167Diagnostic Procedure ..........................................1168Component Inspection ........................................1171

DTC P1564 ASCD STEERING SWITCH ...............1172Component Description .......................................1172CONSULT-II Reference Value in Data Monitor Mode

1172On Board Diagnosis Logic ..................................1172DTC Confirmation Procedure ..............................1172Wiring Diagram ...................................................1174Diagnostic Procedure ..........................................1176Component Inspection ........................................1177

DTC P1572 ASCD BRAKE SWITCH ....................1179Component Description .......................................1179CONSULT-II Reference Value in Data Monitor Mode

1179On Board Diagnosis Logic ..................................1179DTC confirmation Procedure ...............................1179Wiring Diagram ...................................................1181Diagnostic Procedure ..........................................1183Component Inspection ........................................1189

DTC P1574 ASCD VEHICLE SPEED SENSOR ...1191Component Description .......................................1191On Board Diagnosis Logic ..................................1191DTC Confirmation Procedure ..............................1191Diagnostic Procedure ..........................................1192

DTC P1706 PNP SWITCH .....................................1193Component Description .......................................1193CONSULT-II Reference Value in Data Monitor Mode

1193On Board Diagnosis Logic ...................................1193DTC Confirmation Procedure ..............................1193Overall Function Check .......................................1194Wiring Diagram ....................................................1195