Infiniti I30 A33 (2001) Service Manual – ENGINE CONTROL SYSTEM

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ENGINE CONTROL SYSTEM

TROUBLE DIAGNOSIS - INDEX ....................................8

Alphabetical & P No. Index for DTC ...........................8

PRECAUTIONS .............................................................14

Supplemental Restraint System (SRS) ″AIR

BAG″ and ″SEAT BELT PRE-TENSIONER″.............14

Precautions for On Board Diagnostic (OBD)

System of Engine and A/T.........................................14

Engine Fuel & Emission Control System ..................15

Precautions................................................................16

Wiring Diagrams and Trouble Diagnosis...................17

PREPARATION .............................................................18

Special Service Tools................................................18

Commercial Service Tools.........................................18

ENGINE AND EMISSION CONTROL OVERALL

SYSTEM.........................................................................20

Engine Control Component Parts Location...............20

Circuit Diagram..........................................................24

System Diagram ........................................................25

Vacuum Hose Drawing..............................................26

System Chart.............................................................27

ENGINE AND EMISSION BASIC CONTROL

SYSTEM DESCRIPTION...............................................28

Multiport Fuel Injection (MFI) System .......................28

Electronic Ignition (EI) System ..................................30

Air Conditioning Cut Control......................................31

Fuel Cut Control (at no load & high engine

speed)........................................................................32

Evaporative Emission System...................................32

On Board Refueling Vapor Recovery (ORVR)..........38

Positive Crankcase Ventilation..................................47

BASIC SERVICE PROCEDURE...................................49

Fuel Pressure Release..............................................49

Fuel Pressure Check.................................................49

Fuel Pressure Regulator Check ................................50

Injector.......................................................................51

How to Check Idle Speed and Ignition Timing..........52

Idle Speed/Ignition Timing/Idle Mixture Ratio

Adjustment.................................................................53

Idle Air Volume Learning ...........................................66

SECTION

CONTENTS

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION...............................................................68

Introduction................................................................68

Two Trip Detection Logic...........................................68

Emission-related Diagnostic Information...................69

Malfunction Indicator Lamp (MIL)..............................82

OBD System Operation Chart...................................83

CONSULT-II...............................................................89

Generic Scan Tool (GST)........................................103

TROUBLE DIAGNOSIS - INTRODUCTION................105

Introduction..............................................................105

Work Flow................................................................107

TROUBLE DIAGNOSIS - BASIC INSPECTION.........109

Basic Inspection.......................................................109

TROUBLE DIAGNOSIS - GENERAL

DESCRIPTION.............................................................121

DTC Inspection Priority Chart..................................121

Fail-safe Chart .........................................................122

Symptom Matrix Chart.............................................123

CONSULT-II Reference Value in Data Monitor

Mode........................................................................127

Major Sensor Reference Graph in Data Monitor

Mode........................................................................130

ECM Terminals and Reference Value.....................132

TROUBLE DIAGNOSIS - SPECIFICATION VALUE ..140

Description...............................................................140

Testing Condition.....................................................140

Inspection Procedure...............................................140

Diagnostic Procedure ..............................................141

TROUBLE DIAGNOSIS FOR INTERMITTENT

INCIDENT.....................................................................144

Description...............................................................144

Diagnostic Procedure ..............................................144

TROUBLE DIAGNOSIS FOR POWER SUPPLY........145

Main Power Supply and Ground Circuit..................145

DTC P0100 MASS AIR FLOW SENSOR (MAFS)......152

Component Description ...........................................152

CONSULT-II Reference Value in Data Monitor

Mode........................................................................152

IDX

CONTENTS (Cont’d)

On Board Diagnosis Logic.......................................152

Possible Cause........................................................153

DTC Confirmation Procedure..................................153

Overall Function Check...........................................155

Wiring Diagram........................................................156

Diagnostic Procedure ..............................................157

DTC P0105 ABSOLUTE PRESSURE SENSOR........160

Component Description ...........................................160

On Board Diagnosis Logic.......................................160

Possible Cause........................................................160

DTC Confirmation Procedure..................................160

Wiring Diagram........................................................162

Diagnostic Procedure ..............................................163

DTC P0110 INTAKE AIR TEMPERATURE

SENSOR ......................................................................166

Component Description ...........................................166

On Board Diagnosis Logic.......................................166

Possible Cause........................................................166

DTC Confirmation Procedure..................................166

Wiring Diagram........................................................168

Diagnostic Procedure ..............................................169

DTC P0115 ENGINE COOLANT TEMPERATURE

SENSOR (ECTS) (CIRCUIT).......................................171

Component Description ...........................................171

On Board Diagnosis Logic.......................................171

Possible Cause........................................................172

DTC Confirmation Procedure..................................172

Wiring Diagram........................................................173

Diagnostic Procedure ..............................................174

DTC P0120 THROTTLE POSITION SENSOR ...........176

Description...............................................................176

CONSULT-II Reference Value in Data Monitor

Mode........................................................................176

On Board Diagnosis Logic.......................................177

Possible Cause........................................................177

DTC Confirmation Procedure..................................177

Wiring Diagram........................................................181

Diagnostic Procedure ..............................................182

DTC P0125 ENGINE COOLANT TEMPERATURE

SENSOR (ECTS) .........................................................187

Description...............................................................187

On Board Diagnosis Logic.......................................187

Possible Cause........................................................188

DTC Confirmation Procedure..................................188

Wiring Diagram........................................................189

Diagnostic Procedure ..............................................190

DTC P0130 (BANK 1), P0150 (BANK 2) HO2S1

(FRONT) (CIRCUIT).....................................................192

Component Description ...........................................192

CONSULT-II Reference Value in Data Monitor

Mode........................................................................192

On Board Diagnosis Logic.......................................192

Possible Cause........................................................193

DTC Confirmation Procedure..................................193

Overall Function Check...........................................194

Wiring Diagram........................................................195

Diagnostic Procedure ..............................................197

DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1

(FRONT) (LEAN SHIFT MONITORING) .....................202

Component Description ...........................................202

CONSULT-II Reference Value in Data Monitor

Mode........................................................................202

On Board Diagnosis Logic.......................................202

Possible Cause........................................................203

DTC Confirmation Procedure..................................203

Overall Function Check...........................................204

Diagnostic Procedure ..............................................204

DTC P0132 (BANK 1), P0152 (BANK 2) HO2S1

(FRONT) (RICH SHIFT MONITORING) ......................210

Component Description ...........................................210

CONSULT-II Reference Value in Data Monitor

Mode........................................................................210

On Board Diagnosis Logic.......................................210

Possible Cause........................................................211

DTC Confirmation Procedure..................................211

Overall Function Check...........................................212

Diagnostic Procedure ..............................................212

DTC P0133 (BANK 1), P0153 (BANK 2) HO2S1

(FRONT) (RESPONSE MONITORING).......................218

Component Description ...........................................218

CONSULT-II Reference Value in Data Monitor

Mode........................................................................218

On Board Diagnosis Logic.......................................218

Possible Cause........................................................219

DTC Confirmation Procedure..................................219

Overall Function Check...........................................220

Wiring Diagram........................................................221

Diagnostic Procedure ..............................................223

DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1

(FRONT) (HIGH VOLTAGE)........................................231

Component Description ...........................................231

CONSULT-II Reference Value in Data Monitor

Mode........................................................................231

On Board Diagnosis Logic.......................................231

Possible Cause........................................................232

DTC Confirmation Procedure..................................232

Wiring Diagram........................................................233

Diagnostic Procedure ..............................................235

DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1

HEATER (FRONT).......................................................239

Description...............................................................239

CONSULT-II Reference Value in Data Monitor

Mode........................................................................239

On Board Diagnosis Logic.......................................239

EC-2

CONTENTS (Cont’d)

Possible Cause........................................................239

DTC Confirmation Procedure..................................240

Wiring Diagram........................................................241

Diagnostic Procedure ..............................................243

DTC P0137 (BANK 1), P0157 (BANK 2) HO2S2

(REAR) (MIN. VOLTAGE MONITORING)...................246

Component Description ...........................................246

CONSULT-II Reference Value in Data Monitor

Mode........................................................................246

On Board Diagnosis Logic.......................................246

Possible Cause........................................................247

DTC Confirmation Procedure..................................247

Overall Function Check...........................................247

Wiring Diagram........................................................249

Diagnostic Procedure ..............................................251

DTC P0138 (BANK 1), P0158 (BANK 2) HO2S2

(REAR) (MAX. VOLTAGE MONITORING) .................256

Component Description ...........................................256

CONSULT-II Reference Value in Data Monitor

Mode........................................................................256

On Board Diagnosis Logic.......................................256

Possible Cause........................................................257

DTC Confirmation Procedure..................................257

Overall Function Check...........................................257

Wiring Diagram........................................................259

Diagnostic Procedure ..............................................261

DTC P0139 (BANK 1), P0159 (BANK 2) HO2S2

(REAR) (RESPONSE MONITORING).........................266

Component Description ...........................................266

CONSULT-II Reference Value in Data Monitor

Mode........................................................................266

On Board Diagnosis Logic.......................................266

Possible Cause........................................................267

DTC Confirmation Procedure..................................267

Overall Function Check...........................................267

Wiring Diagram........................................................269

Diagnostic Procedure ..............................................271

DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2

(REAR) (HIGH VOLTAGE)..........................................276

Component Description ...........................................276

CONSULT-II Reference Value in Data Monitor

Mode........................................................................276

On Board Diagnosis Logic.......................................276

Possible Cause........................................................277

DTC Confirmation Procedure..................................277

Overall Function Check...........................................277

Wiring Diagram........................................................279

Diagnostic Procedure ..............................................281

DTC P0141 (BANK 1), P0161 (BANK 2) HO2S2

HEATER (REAR).........................................................285

Description...............................................................285

CONSULT-II Reference Value in Data Monitor

Mode........................................................................285

On Board Diagnosis Logic.......................................285

Possible Cause........................................................285

DTC Confirmation Procedure..................................286

Wiring Diagram........................................................287

Diagnostic Procedure ..............................................289

DTC P0171 (BANK 1), P0174 (BANK 2) FUEL

INJECTION SYSTEM FUNCTION (LEAN) .................292

On Board Diagnosis Logic.......................................292

Possible Cause........................................................292

DTC Confirmation Procedure..................................292

Wiring Diagram........................................................294

Diagnostic Procedure ..............................................296

DTC P0172 (BANK 1), P0175 (BANK 2) FUEL

INJECTION SYSTEM FUNCTION (RICH) ..................300

On Board Diagnosis Logic.......................................300

Possible Cause........................................................300

DTC Confirmation Procedure..................................300

Wiring Diagram........................................................302

Diagnostic Procedure ..............................................304

DTC P0180 FUEL TANK TEMPERATURE

SENSOR ......................................................................307

Component Description ...........................................307

On Board Diagnosis Logic.......................................307

Possible Cause........................................................307

DTC Confirmation Procedure..................................308

Wiring Diagram........................................................309

Diagnostic Procedure ..............................................310

DTC P0217 COOLANT OVERTEMPERATURE

ENRICHMENT PROTECTION.....................................312

System Description..................................................312

CONSULT-II Reference Value in Data Monitor

Mode........................................................................312

On Board Diagnosis Logic.......................................313

Possible Cause........................................................313

Overall Function Check...........................................313

Wiring Diagram........................................................316

Diagnostic Procedure ..............................................318

Main 12 Causes of Overheating..............................329

DTC P0300 - P0306 NO.6-1CYLINDER

MISFIRE, MULTIPLE CYLINDER MISFIRE ...............330

On Board Diagnosis Logic.......................................330

Possible Cause........................................................330

DTC Confirmation Procedure..................................331

Diagnostic Procedure ..............................................331

DTC P0325 KNOCK SENSOR (KS)...........................338

Component Description ...........................................338

On Board Diagnosis Logic.......................................338

Possible Cause........................................................338

DTC Confirmation Procedure..................................338

Wiring Diagram........................................................339

IDX

EC-3

CONTENTS (Cont’d)

Diagnostic Procedure ..............................................340

DTC P0335 CRANKSHAFT POSITION SENSOR

(CKPS) (POS)..............................................................343

Component Description ...........................................343

CONSULT-II Reference Value in Data Monitor

Mode........................................................................343

On Board Diagnosis Logic.......................................343

Possible Cause........................................................343

DTC Confirmation Procedure..................................344

Wiring Diagram........................................................345

Diagnostic Procedure ..............................................346

DTC P0340 CAMSHAFT POSITION SENSOR

(CMPS) (PHASE).........................................................351

Component Description ...........................................351

On Board Diagnosis Logic.......................................351

Possible Cause........................................................351

DTC Confirmation Procedure..................................351

Wiring Diagram........................................................353

Diagnostic Procedure ..............................................354

DTC P0420 (BANK 1), P0430 (BANK 2) THREE

WAY CATALYST FUNCTION.....................................357

On Board Diagnosis Logic.......................................357

Possible Cause........................................................357

DTC Confirmation Procedure..................................358

Overall Function Check...........................................358

Diagnostic Procedure ..............................................359

DTC P0440 EVAP CONTROL SYSTEM (SMALL

LEAK) (NEGATIVE PRESSURE)................................362

On Board Diagnosis Logic.......................................362

Possible Cause........................................................362

DTC Confirmation Procedure..................................363

Diagnostic Procedure ..............................................364

DTC P0443 EVAP CANISTER PURGE VOLUME

CONTROL SOLENOID VALVE (CIRCUIT).................377

Description...............................................................377

CONSULT-II Reference Value in Data Monitor

Mode........................................................................377

On Board Diagnosis Logic.......................................378

Possible Cause........................................................378

DTC Confirmation Procedure..................................378

Wiring Diagram........................................................379

Diagnostic Procedure ..............................................380

DTC P0446 EVAPORATIVE EMISSION (EVAP)

CANISTER VENT CONTROL VALVE (CIRCUIT) ......383

Component Description ...........................................383

CONSULT-II Reference Value in Data Monitor

Mode........................................................................383

On Board Diagnosis Logic.......................................383

Possible Cause........................................................383

DTC Confirmation Procedure..................................384

Wiring Diagram........................................................385

Diagnostic Procedure ..............................................386

DTC P0450 EVAPORATIVE EMISSION (EVAP)

CONTROL SYSTEM PRESSURE SENSOR ..............390

Component Description ...........................................390

CONSULT-II Reference Value in Data Monitor

Mode........................................................................390

On Board Diagnosis Logic.......................................390

Possible Cause........................................................390

DTC Confirmation Procedure..................................391

Wiring Diagram........................................................392

Diagnostic Procedure ..............................................393

DTC P0455 EVAP CONTROL SYSTEM (GROSS

LEAK)...........................................................................402

On Board Diagnosis Logic.......................................402

Possible Cause........................................................402

DTC Confirmation Procedure..................................403

Diagnostic Procedure ..............................................404

DTC P0460 FUEL LEVEL SENSOR FUNCTION

(SLOSH).......................................................................415

Component Description ...........................................415

On Board Diagnostic Logic......................................415

Possible Cause........................................................415

DTC Confirmation Procedure..................................415

Wiring Diagram........................................................416

Diagnostic Procedure ..............................................417

DTC P0461 FUEL LEVEL SENSOR FUNCTION.......419

Component Description ...........................................419

On Board Diagnostic Logic......................................419

Possible Cause........................................................419

Overall Function Check...........................................419

DTC P0464 FUEL LEVEL SENSOR CIRCUIT...........421

Component Description ...........................................421

On Board Diagnostic Logic......................................421

Possible Cause........................................................421

DTC Confirmation Procedure..................................421

Wiring Diagram........................................................422

Diagnostic Procedure ..............................................423

DTC P0500 VEHICLE SPEED SENSOR (VSS) .........425

Component Description ...........................................425

On Board Diagnosis Logic.......................................425

Possible Cause........................................................425

DTC Confirmation Procedure..................................425

Overall Function Check...........................................426

Wiring Diagram........................................................427

Diagnostic Procedure ..............................................428

DTC P0505 IDLE AIR CONTROL VALVE (IACV) -

AUXILIARY AIR CONTROL (AAC) VALVE ...............429

Description...............................................................429

CONSULT-II Reference Value in Data Monitor

Mode........................................................................430

On Board Diagnosis Logic.......................................430

Possible Cause........................................................430

DTC Confirmation Procedure..................................430

EC-4

CONTENTS (Cont’d)

Wiring Diagram........................................................432

Diagnostic Procedure ..............................................433

DTC P0510 CLOSED THROTTLE POSITION

SWITCH .......................................................................438

Component Description ...........................................438

CONSULT-II Reference Value in Data Monitor

Mode........................................................................438

On Board Diagnosis Logic.......................................438

Possible Cause........................................................438

DTC Confirmation Procedure..................................439

Overall Function Check...........................................439

Wiring Diagram........................................................441

Diagnostic Procedure ..............................................442

DTC P0600 A/T COMMUNICATION LINE..................446

System Description..................................................446

On Board Diagnosis Logic.......................................446

Possible Cause........................................................446

DTC Confirmation Procedure..................................446

Wiring Diagram........................................................447

Diagnostic Procedure ..............................................448

DTC P0605 ECM .........................................................449

Component Description ...........................................449

On Board Diagnosis Logic.......................................449

Possible Cause........................................................449

DTC Confirmation Procedure..................................449

Diagnostic Procedure ..............................................450

DTC P1126 THERMOSTAT FUNCTION.....................451

On Board Diagnosis Logic.......................................451

Possible Cause........................................................451

DTC Confirmation Procedure..................................451

Diagnostic Procedure ..............................................452

DTC P1130 SWIRL CONTROL VALVE CONTROL

SOLENOID VALVE......................................................453

Description...............................................................453

CONSULT-II Reference Value in Data Monitor

Mode........................................................................454

On Board Diagnosis Logic.......................................454

Possible Cause........................................................454

DTC Confirmation Procedure..................................455

Wiring Diagram........................................................457

Diagnostic Procedure ..............................................458

DTC P1148 (BANK 1), P1168 (BANK 2) CLOSED

LOOP CONTROL ........................................................476

On Board Diagnosis Logic.......................................476

Possible Cause........................................................476

DTC Confirmation Procedure..................................476

Overall Function Check...........................................477

Diagnostic Procedure ..............................................477

DTC P1165 SWIRL CONTROL VALVE CONTROL

VACUUM CHECK SWITCH.........................................478

Component Description ...........................................478

CONSULT-II Reference Value in Data Monitor

Mode........................................................................478

On Board Diagnosis Logic.......................................478

Possible Cause........................................................478

DTC Confirmation Procedure..................................479

Wiring Diagram........................................................480

Diagnostic Procedure ..............................................481

DTC P1211 ABS/TCS CONTROL UNIT .....................484

Description...............................................................484

On Board Diagnosis Logic.......................................484

Possible Cause........................................................484

DTC Confirmation Procedure..................................484

Overall Function Check...........................................485

Diagnostic Procedure ..............................................485

DTC P1212 ABS/TCS COMMUNICATION LINE........486

Description...............................................................486

On Board Diagnosis Logic.......................................486

Possible Cause........................................................486

DTC Confirmation Procedure..................................486

Wiring Diagram........................................................487

Diagnostic Procedure ..............................................488

DTC P1217 ENGINE OVER TEMPERATURE

(OVERHEAT)...............................................................489

System Description..................................................489

CONSULT-II Reference Value in Data Monitor

Mode........................................................................489

On Board Diagnosis Logic.......................................490

Possible Cause........................................................490

Overall Function Check...........................................490

Wiring Diagram........................................................492

Diagnostic Procedure ..............................................494

Main 12 Causes of Overheating..............................505

DTC P1320 IGNITION SIGNAL...................................506

Component Description ...........................................506

On Board Diagnosis Logic.......................................506

Possible Cause........................................................506

DTC Confirmation Procedure..................................506

Wiring Diagram........................................................508

Diagnostic Procedure ..............................................511

DTC P1335 CRANKSHAFT POSITION SENSOR

(CKPS) (REF) ..............................................................517

Component Description ...........................................517

CONSULT-II Reference Value in Data Monitor

Mode........................................................................517

On Board Diagnosis Logic.......................................517

Possible Cause........................................................518

DTC Confirmation Procedure..................................518

Wiring Diagram........................................................519

Diagnostic Procedure ..............................................520

DTC P1336 CRANKSHAFT POSITION SENSOR

(CKPS) (POS) (COG)..................................................523

Component Description ...........................................523

IDX

EC-5

CONTENTS (Cont’d)

CONSULT-II Reference Value in Data Monitor

Mode........................................................................523

On Board Diagnosis Logic.......................................523

Possible Cause........................................................523

DTC Confirmation Procedure..................................524

Wiring Diagram........................................................525

Diagnostic Procedure ..............................................526

DTC P1440 EVAP CONTROL SYSTEM (SMALL

LEAK) (POSITIVE PRESSURE) .................................531

On Board Diagnosis Logic.......................................531

Possible Cause........................................................531

DTC Confirmation Procedure..................................532

Diagnostic Procedure ..............................................532

DTC P1444 EVAP CANISTER PURGE VOLUME

CONTROL SOLENOID VALVE...................................533

Description...............................................................533

CONSULT-II Reference Value in Data Monitor

Mode........................................................................533

On Board Diagnosis Logic.......................................534

Possible Cause........................................................534

DTC Confirmation Procedure..................................534

Wiring Diagram........................................................536

Diagnostic Procedure ..............................................537

DTC P1446 EVAPORATIVE EMISSION (EVAP)

CANISTER VENT CONTROL VALVE (CLOSE).........545

Component Description ...........................................545

CONSULT-II Reference Value in Data Monitor

Mode........................................................................545

On Board Diagnosis Logic.......................................545

Possible Cause........................................................545

DTC Confirmation Procedure..................................546

Wiring Diagram........................................................547

Diagnostic Procedure ..............................................548

DTC P1447 EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM PURGE FLOW

MONITORING..............................................................553

System Description..................................................553

On Board Diagnosis Logic.......................................553

Possible Cause........................................................553

DTC Confirmation Procedure..................................554

Overall Function Check...........................................554

Diagnostic Procedure ..............................................556

DTC P1448 EVAPORATIVE EMISSION (EVAP)

CANISTER VENT CONTROL VALVE (OPEN)...........564

Component Description ...........................................564

CONSULT-II Reference Value in Data Monitor

Mode........................................................................564

On Board Diagnosis Logic.......................................564

Possible Cause........................................................564

DTC Confirmation Procedure..................................565

Overall Function Check...........................................566

Wiring Diagram........................................................567

Diagnostic Procedure ..............................................568

DTC P1464 FUEL LEVEL SENSOR CIRCUIT

(GROUND SIGNAL) ....................................................573

Component Description ...........................................573

On Board Diagnostic Logic......................................573

Possible Cause........................................................573

DTC Confirmation Procedure..................................573

Wiring Diagram........................................................574

Diagnostic Procedure ..............................................575

DTC P1490 VACUUM CUT VALVE BYPASS

VALVE (CIRCUIT)........................................................576

Description...............................................................576

CONSULT-II Reference Value in Data Monitor

Mode........................................................................576

On Board Diagnosis Logic.......................................576

Possible Cause........................................................577

DTC Confirmation Procedure..................................577

Wiring Diagram........................................................578

Diagnostic Procedure ..............................................579

DTC P1491 VACUUM CUT VALVE BYPASS

VALVE..........................................................................582

Description...............................................................582

CONSULT-II Reference Value in Data Monitor

Mode........................................................................582

On Board Diagnosis Logic.......................................582

Possible Cause........................................................583

DTC Confirmation Procedure..................................583

Overall Function Check...........................................584

Wiring Diagram........................................................585

Diagnostic Procedure ..............................................586

DTC P1605 A/T DIAGNOSIS COMMUNICATION

LINE .............................................................................594

Component Description ...........................................594

On Board Diagnosis Logic.......................................594

Possible Cause........................................................594

DTC Confirmation Procedure..................................594

Wiring Diagram........................................................595

Diagnostic Procedure ..............................................596

DTC P1706 PARK/NEUTRAL POSITION (PNP)

SWITCH .......................................................................597

Component Description ...........................................597

CONSULT-II Reference Value in Data Monitor

Mode........................................................................597

On Board Diagnosis Logic.......................................597

Possible Cause........................................................597

DTC Confirmation Procedure..................................597

Overall Function Check...........................................598

Wiring Diagram........................................................599

Diagnostic Procedure ..............................................600

VARIABLE INDUCTION AIR CONTROL SYSTEM

(VIAS)...........................................................................602

Description...............................................................602

EC-6

CONTENTS (Cont’d)

Wiring Diagram........................................................604

Diagnostic Procedure ..............................................605

INJECTOR ...................................................................608

Component Description ...........................................608

CONSULT-II Reference Value in Data Monitor

Mode........................................................................608

Wiring Diagram........................................................609

Diagnostic Procedure ..............................................610

START SIGNAL...........................................................614

CONSULT-II Reference Value in Data Monitor

Mode........................................................................614

Wiring Diagram........................................................615

Diagnostic Procedure ..............................................616

FUEL PUMP.................................................................618

System Description..................................................618

Component Description ...........................................618

CONSULT-II Reference Value in Data Monitor

Mode........................................................................618

Wiring Diagram........................................................619

Diagnostic Procedure ..............................................620

ELECTRONIC CONTROLLED ENGINE MOUNT.......624

System Description..................................................624

CONSULT-II Reference Value in Data Monitor

Mode........................................................................624

Wiring Diagram........................................................625

Diagnostic Procedure ..............................................626

POWER STEERING OIL PRESSURE SWITCH.........628

Component Description ...........................................628

CONSULT-II Reference Value in Data Monitor

Mode........................................................................628

Wiring Diagram........................................................629

Diagnostic Procedure ..............................................630

REFRIGERANT PRESSURE SENSOR......................633

Description...............................................................633

Wiring Diagram........................................................634

Diagnostic Procedure ..............................................635

ELECTRICAL LOAD SIGNAL.....................................637

Wiring Diagram........................................................637

Diagnostic Procedure ..............................................639

MIL & DATA LINK CONNECTORS............................643

Wiring Diagram........................................................643

SERVICE DATA AND SPECIFICATIONS (SDS).......644

Fuel Pressure Regulator..........................................644

Idle Speed and Ignition Timing................................644

Mass Air Flow Sensor..............................................644

Engine Coolant Temperature Sensor......................644

Heated Oxygen Sensor 1 Heater (Front)................644

Fuel Pump ...............................................................644

IACV-AAC Valve......................................................644

Injector.....................................................................644

Resistor....................................................................644

Throttle Position Sensor..........................................645

Calculated Load Value.............................................645

Intake Air Temperature Sensor................................645

Heated Oxygen Sensor 2 Heater (Rear).................645

Crankshaft Position Sensor (REF) ..........................645

Fuel Tank Temperature Sensor ...............................645

Camshaft Position Sensor (PHASE) .......................645

IDX

EC-7

Alphabetical & P No. Index for DTC

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC

ALPHABETICAL INDEX FOR DTC

Items

(CONSULT-II screen terms) Unable to access ECM — EC-122 ABSL PRES SEN/CIRC P0105 EC-160 AIR TEMP SEN/CIRC P0110 EC-166 A/T 1ST GR FNCTN P0731 AT-124 A/T 2ND GR FNCTN P0732 AT-130 A/T 3RD GR FNCTN P0733 AT-136 A/T 4TH GR FNCTN P0734 AT-142 A/T COMM LINE P0600*2 EC-446 A/T DIAG COMM LINE P1605 EC-594 A/T TCC S/V FNCTN P0744 AT-156 ATF TEMP SEN/CIRC P0710 AT-108 CKP SENSOR (COG) P1336 EC-523 CKP SEN/CIRCUIT P0335 EC-343

DTC*1 Reference page

NHEC0001

NHEC0001S01

CKP SEN (REF)/CIRC P1335 EC-517 CLOSED LOOP-B1 P1148 EC-476 CLOSED LOOP-B2 P1168 EC-476 CLOSED TP SW/CIRC P0510 EC-438 CMP SEN/CIRCUIT P0340 EC-351 COOLANT T SEN/CIRC*3 P0115 EC-171 *COOLANT T SEN/CIRC P0125 EC-187

CYL 1 MISFIRE P0301 EC-330 CYL 2 MISFIRE P0302 EC-330 CYL 3 MISFIRE P0303 EC-330 CYL 4 MISFIRE P0304 EC-330 CYL 5 MISFIRE P0305 EC-330 CYL 6 MISFIRE P0306 EC-330 ECM P0605 EC-449 ENGINE SPEED SIG P0725 AT-119 ENG OVER TEMP P0217 EC-312 ENG OVER TEMP P1217*2 EC-489 EVAP GROSS LEAK P0455 EC-402 EVAP PURG FLOW/MON P1447 EC-553 EVAP SYS PRES SEN P0450 EC-390 EVAP SMALL LEAK P0440 EC-362 EVAP SMALL LEAK P1440 EC-531

EC-8

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC (Cont’d)

Items

(CONSULT-II screen terms) FUEL LEVL SEN/CIRC P0464 EC-421 FUEL LEVL SEN/CIRC P1464 EC-573 FUEL LEVEL SENSOR P0461 EC-419 FUEL LV SE (SLOSH) P0460 EC-415 FUEL SYS-LEAN/BK1 P0171 EC-292 FUEL SYS-LEAN/BK2 P0174 EC-292 FUEL SYS-RICH/BK1 P0172 EC-300 FUEL SYS-RICH/BK2 P0175 EC-300 FUEL TEMP SEN/CIRC P0180 EC-307 HO2S1 (B1) P0130 EC-192 HO2S1 (B1) P0131 EC-202 HO2S1 (B1) P0132 EC-210 HO2S1 (B1) P0133 EC-218 HO2S1 (B1) P0134 EC-231 HO2S1 (B2) P0150 EC-192

DTC*1 Reference page

HO2S1 (B2) P0151 EC-202 HO2S1 (B2) P0152 EC-210 HO2S1 (B2) P0153 EC-218 HO2S1 (B2) P0154 EC-231 HO2S1 HTR (B1) P0135 EC-239 HO2S1 HTR (B2) P0155 EC-239

HO2S2 (B1) P0137 EC-246 HO2S2 (B1) P0138 EC-256 HO2S2 (B1) P0139 EC-266 HO2S2 (B1) P0140 EC-276 HO2S2 (B2) P0157 EC-246 HO2S2 (B2) P0158 EC-256 HO2S2 (B2) P0159 EC-266 HO2S2 (B2) P0160 EC-276 HO2S2 HTR (B1) P0141 EC-285 HO2S2 HTR (B2) P0161 EC-285 IACV/AAC VLV/CIRC P0505 EC-429

IDX

IGN SIGNAL-PRIMARY P1320 EC-506 KNOCK SEN/CIRC-B1 P0325*2 EC-338 L/PRES SOL/CIRC P0745 AT-166 MAF SEN/CIRCUIT*3 P0100 EC-152 MULTI CYL MISFIRE P0300 EC-330

EC-9

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC (Cont’d)

Items

(CONSULT-II screen terms) NATS MALFUNCTION P1610 - P1615*2 EL-415

NO DTC IS DETECTED. FURTHER TESTING MAY BE REQUIRED.

O/R CLTCH SOL/CIRC P1760 AT-191 P-N POS SW/CIRCUIT P1706 EC-597 PNP SW/CIRC P0705 AT-102 PURG VOLUME CONT/V P0443 EC-377 PURG VOLUME CONT/V P1444 EC-533 SFT SOL A/CIRC*3 P0750 AT-172 SFT SOL B/CIRC*3 P0755 AT-177 SWIRL CONT SOL/V P1130 EC-453 SWL CON VC SW/CIRC P1165 EC-478 TCC SOLENOID/CIRC P0740 AT-151 TCS CIRC P1212*2 EC-486 TCS C/U FUNCTN P1211*2 EC-484

DTC*1 Reference page

P0000 —

THERMOSTAT FNCTN P1126 EC-451 TP SEN/CIRC A/T*3 P1705 AT-182 TRTL POS SEN/CIRC*3 P0120 EC-176 TW CATALYST SYS-B1 P0420 EC-357 TW CATALYST SYS-B2 P0430 EC-357 VC CUT/V BYPASS/V P1491 EC-582

VC/V BYPASS/V P1490 EC-576 VEH SPEED SEN/CIRC*4 P0500 EC-425 VEH SPD SEN/CIR A/T*4 P0720 AT-114 VENT CONTROL VALVE P0446 EC-383 VENT CONTROL VALVE P1446 EC-545 VENT CONTROL VALVE P1448 EC-564

*1: 1st trip DTC No. is the same as DTC No. *2: This DTC is displayed with CONSULT-II only. *3: When the fail-safe operation occurs, the MIL illuminates. *4: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at

the same time.

NOTE:

Regarding A33 models, “-B1” and “BK1” indicate right bank and “-B2” and “BK2” indicate left bank.

EC-10

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC (Cont’d)

P NO. INDEX FOR DTC

DTC*1

— Unable to access ECM EC-122

P0000

P0100 MAF SEN/CIRCUIT*3 EC-152 P0105 ABSL PRES SEN/CIRC EC-160

P0110 AIR TEMP SEN/CIRC EC-166

P0115 COOLANT T SEN/CIRC*3 EC-171 P0120 THRTL POS SEN/CIRC*3 EC-176 P0125 *COOLANT T SEN/CIRC EC-187 P0130 HO2S1 (B1) EC-192 P0131 HO2S1 (B1) EC-202 P0132 HO2S1 (B1) EC-210 P0133 HO2S1 (B1) EC-218 P0134 HO2S1 (B1) EC-231

(CONSULT-II screen terms)

NO DTC IS DETECTED. FURTHER TESTING MAY BE REQUIRED.

Items

Reference page

—

=NHEC0001S02

P0135 HO2S1 HTR (B1) EC-239 P0137 HO2S2 (B1) EC-246 P0138 HO2S2 (B1) EC-256 P0139 HO2S2 (B1) EC-266 P0140 HO2S2 (B1) EC-276 P0141 HO2S2 HTR (B1) EC-285

P0150 HO2S1 (B2) EC-192 P0151 HO2S1 (B2) EC-202 P0152 HO2S1 (B2) EC-210 P0153 HO2S1 (B2) EC-218 P0154 HO2S1 (B2) EC-231 P0155 HO2S1 HTR (B2) EC-239 P0157 HO2S2 (B2) EC-246 P0158 HO2S2 (B2) EC-256 P0159 HO2S2 (B2) EC-266 P0160 HO2S2 (B2) EC-276 P0161 HO2S2 HTR (B2) EC-285

IDX

P0171 FUEL SYS-LEAN/BK1 EC-292 P0172 FUEL SYS-RICH/BK1 EC-300 P0174 FUEL SYS-LEAN/BK2 EC-292 P0175 FUEL SYS-RICH/BK2 EC-300 P0180 FUEL TEMP SEN/CIRC EC-307

EC-11

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC (Cont’d)

DTC*1

P0217 ENG OVER TEMP EC-312 P0300 MULTI CYL MISFIRE EC-330 P0301 CYL 1 MISFIRE EC-330 P0302 CYL 2 MISFIRE EC-330 P0303 CYL 3 MISFIRE EC-330 P0304 CYL 4 MISFIRE EC-330 P0305 CYL 5 MISFIRE EC-330 P0306 CYL 6 MISFIRE EC-330

P0325*2 KNOCK SEN/CIRC-B1 EC-338

P0335 CKP SEN/CIRCUIT EC-343 P0340 CMP SEN/CIRCUIT EC-351 P0420 TW CATALYST SYS-B1 EC-357 P0430 TW CATALYST SYS-B2 EC-357 P0440 EVAP SMALL LEAK EC-362 P0443 PURG VOLUME CONT/V EC-377

(CONSULT-II screen terms)

Items

Reference page

P0446 VENT CONTROL VALVE EC-383 P0450 EVAP SYS PRES SEN EC-390 P0455 EVAP GROSS LEAK EC-402 P0460 FUEL LV SE (SLOSH) EC-415 P0461 FUEL LEVEL SENSOR EC-419 P0464 FUEL LEVL SEN/CIRC EC-421

P0500 VEH SPEED SEN/CIRC*4 EC-425 P0505 IACV/AAC VLV/CIRC EC-429 P0510 CLOSED TP SW/CIRC EC-438

P0600*2 A/T COMM LINE EC-446

P0605 ECM EC-449 P0705 PNP SW/CIRC AT-102 P0710 ATF TEMP SEN/CIRC AT-108 P0720 VEH SPD SEN/CIR A/T*4 AT-114 P0725 ENGINE SPEED SIG AT-119 P0731 A/T 1ST GR FNCTN AT-124 P0732 A/T 2ND GR FNCTN AT-130 P0733 A/T 3RD GR FNCTN AT-136 P0734 A/T 4TH GR FNCTN AT-142 P0740 TCC SOLENOID/CIRC AT-151 P0744 A/T TCC S/V FNCTN AT-156 P0745 L/PRESS SOL/CIRC AT-166

EC-12

TROUBLE DIAGNOSIS — INDEX

Alphabetical & P No. Index for DTC (Cont’d)

DTC*1

P0750 SFT SOL A/CIRC*3 AT-172 P0755 SFT SOL B/CIRC*3 AT-177

P1126 THERMOSTAT FNCTN EC-451

P1130 SWIRL CONT SOL/V EC-453

P1148 CLOSED LOOP-B1 EC-476

P1165 SWL CON VC SW/CIRC EC-478

P1168 CLOSED LOOP-B2 EC-476

P1211*2 TCS C/U FUNCTN EC-484 P1212*2 TCS CIRC EC-486 P1217*2 ENG OVER TEMP EC-489

P1320 IGN SIGNAL-PRIMARY EC-506 P1335 CKP SEN (REF)/CIRC EC-517 P1336 CKP SENSOR (COG) EC-523 P1440 EVAP SMALL LEAK EC-531 P1444 PURG VOLUME CONT/V EC-533

(CONSULT-II screen terms)

Items

Reference page

P1446 VENT CONTROL VALVE EC-545 P1447 EVAP PURG FLOW/MON EC-553 P1448 VENT CONTROL VALVE EC-564 P1464 FUEL LEVEL SEN/CIRC EC-573 P1490 VC/V BYPASS/V EC-576 P1491 VC CUT/V BYPASS/V EC-582

the same time.

NOTE:

Regarding A33 models, “-B1” and “BK1” indicate right bank and “-B2” and “BK2” indicate left bank.

P1605 A/T DIAG COMM LINE EC-594

P1610 - P1615*2 NATS MALFUNCTION EL-415

P1705 TP SEN/CIRC A/T*3 AT-182 P1706 P-N POS SW/CIRCUIT EC-597 P1760 O/R CLTCH SOL/CIRC AT-191

IDX

EC-13

PRECAUTIONS

Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER” used along with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. The SRS system composition which is available to INFINITI I30 is as follows (The composition varies according to optional equipment.):

I For a frontal collision

The Supplemental Restraint System consists of driver air bag module (located in the center of the steering wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt pre-tensioners, a diagnosis sensor unit, crash zone sensor,warning lamp, wiring harness and spiral cable.

I For a side collision

The Supplemental Restraint System consists of front side air bag module (located in the outer side of front seat), satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).

Information necessary to service the system safely is included in the RS section of this Service Manual.

WARNING:

I To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death

in the event of a collision which would result in air bag inflation, all maintenance should be performed by an authorized INFINITI dealer.

I Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-

sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the RS section.

I Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified with yellow harness connector (and with yellow harness protector or yellow insulation tape before the harness connectors).

NHEC0002

Precautions for On Board Diagnostic (OBD) System of Engine and A/T

The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the driver of a malfunction causing emission deterioration.

CAUTION:

I Be sure to turn the ignition switch OFF and disconnect the negative battery terminal before any

repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will cause the MIL to light up.

I Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will

cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease, dirt, bent terminals, etc.)

I Certain systems and components, especially those related to OBD, may use a new style slide-

locking type harness connector. For description and how to disconnect, refer to EL section, “Description”, “HARNESS CONNECTOR”.

I Be sure to route and secure the harnesses properly after work. The interference of the harness with

a bracket, etc. may cause the MIL to light up due to the short circuit.

I Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube

may cause the MIL to light up due to the malfunction of the EGR system or fuel injection system, etc.

I Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and

TCM (Transmission control module) before returning the vehicle to the customer.

NHEC0003

EC-14

PRECAUTIONS

Engine Fuel & Emission Control System

NHEC0004

IDX

EC-15

SEF242XB

Precautions

PRECAUTIONS

SEF289H

SEF908W

Precautions

NHEC0005

I Before connecting or disconnecting the ECM harness

connector, turn ignition switch OFF and disconnect negative battery terminal. Failure to do so may damage the ECM because battery voltage is applied to ECM even if ignition switch is turned off.

I When connecting ECM harness connector, fasten it

securely with a lever as far as it will go as shown at left.

I When connecting or disconnecting pin connectors into or

from ECM, take care not to damage pin terminals (bend or break). Make sure that there are not any bends or breaks on ECM pin terminal, when connecting pin connectors.

SEF291H

I Before replacing ECM, perform “ECM Terminals and Ref-

erence Value” inspection and make sure ECM functions properly. Refer to EC-132.

MEF040D

I After performing each TROUBLE DIAGNOSIS, perform

“DTC Confirmation Procedure” or “Overall Function Check”. The DTC should not be displayed in the “DTC Confirmation Procedure” if the repair is completed. The “Overall Function Check” should be a good result if the repair is completed.

SEF217U

EC-16

PRECAUTIONS

Precautions (Cont’d)

I When measuring ECM signals with a circuit tester, never

allow the two tester probes to contact. Accidental contact of probes will cause a short circuit and damage the ECM power transistor.

I Do not use ECM ground terminals when measuring input/

output voltage. Doing so may result in damage to the ECM’s transistor. Use a ground other than ECM terminals, such as the ground.

SEF348N

I Regarding model A33, “B1” indicates the right bank and

“B2” indicates the left bank as shown in the figure.

SEF099W

Wiring Diagrams and Trouble Diagnosis

When you read Wiring diagrams, refer to the following:

I GI-11, “HOW TO READ WIRING DIAGRAMS” I EL-10, “POWER SUPPLY ROUTING” for power distribution circuit

When you perform trouble diagnosis, refer to the following:

I GI-35, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES” I GI-24, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”

NHEC0006

EC-17

IDX

Special Service Tools

PREPARATION

Special Service Tools

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number (Kent-Moore No.) Tool name

KV10117100 (J36471-A) Front heated oxygen sensor wrench Rear heated oxygen sensor wrench

KV10117600 (J44321) Fuel pressure check adapter

Description

Loosening or tightening front and rear heated oxygen sensors with 22 mm (0.87 in) hexagon nut

NT379

Checking fuel pressure with pressure gauge

NT777

Commercial Service Tools

Tool name (Kent-Moore No.)

Description

NHEC0007

NHEC0008

Leak detector (J41416)

EVAP service port adapter (J41413-OBD)

Hose clipper

Locating the EVAP leak

NT703

Applying positive pressure through EVAP service port

NT704

Clamping the EVAP purge hose between the fuel tank and EVAP canister applied to DTC P1440 [EVAP control system (small leak-positive pressure)]

NT720

EC-18

PREPARATION

Commercial Service Tools (Cont’d)

Tool name (Kent-Moore No.)

Fuel filler cap adapter

Socket wrench

Oxygen sensor thread cleaner (J-43897-18) (J-43897-12)

Description

NT653

NT705

Checking fuel tank vacuum relief valve opening pressure

Removing and installing engine coolant temperature sensor

Reconditioning the exhaust system threads before installing a new oxygen sensor. Use with anti-seize lubricant shown below.

a: J-43897-18 18 mm diameter, for Zirconia Oxygen Sensor b: J-43897-12 12 mm diameter, for Titania Oxygen Sensor

Anti-seize lubricant (Permatex equivalent meeting MIL specification MIL-A-907)

133AR or

NT778

NT779

Lubricating oxygen sensor thread cleaning tool when reconditioning exhaust system threads.

IDX

EC-19

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location

NHEC0009

SEF991Z

EC-20

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

EC-21

IDX

SEF992Z

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

SEF993Z

EC-22

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

EC-23

IDX

SEF814Y

Circuit Diagram

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Circuit Diagram

NHEC0010

MEC359D

EC-24

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

System Diagram

NHEC0011

IDX

EC-25

SEF994Z

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Vacuum Hose Drawing

NHEC0012

Refer to “System Diagram”, EC-25 for Vacuum Control System.

SEF995Z

EC-26

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

System Chart

Input (Sensor) ECM Function Output (Actuator)

I Camshaft position sensor (PHASE) I Crankshaft position sensor (REF) I Mass air flow sensor I Engine coolant temperature sensor I Heated oxygen sensor 1 (front) I Ignition switch I Throttle position sensor I Closed throttle position switch*3 I Park/neutral position (PNP) switch I Air conditioner switch I Knock sensor I Intake air temperature sensor I Absolute pressure sensor I EVAP control system pressure sensor*1 I Battery voltage I Power steering oil pressure switch I Vehicle speed sensor I Fuel tank temperature sensor*1 I Crankshaft position sensor (POS) I Heated oxygen sensor 2 (rear)*2 I TCM (Transmission control module) I Refrigerant pressure sensor I ABS/TCS control unit I Electrical load I Fuel level sensor*1

*1: These sensors are not used to control the engine system. They are used only for the on board diagnosis. *2: This sensor is not used to control the engine system under normal conditions. *3: This switch will operate in place of the throttle position sensor to control EVAP parts if the sensor malfunctions.

Fuel injection & mixture ratio control Injectors Electronic ignition system Power transistor Idle air control system IACV-AAC valve Fuel pump control Fuel pump relay On board diagnostic system MIL (On the instrument panel)

Swirl control valve control

Power valve control VIAS control solenoid valve Heated oxygen sensor 1 heater (front) con-

trol

Heated oxygen sensor 2 heater (rear) control

EVAP canister purge flow control

Air conditioning cut control Air conditioner relay Cooling fan control Cooling fan relays

ON BOARD DIAGNOSIS for EVAP system

Swirl control valve control solenoid valve

Heated oxygen sensor 1 heater (front)

Heated oxygen sensor 2 heater (rear)

EVAP canister purge volume control solenoid valve

I EVAP canister vent control valve I Vacuum cut valve bypass valve

NHEC0013

IDX

EC-27

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Multiport Fuel Injection (MFI) System

DESCRIPTION Input/Output Signal Chart

Sensor Input Signal to ECM

Crankshaft position sensor (POS) Engine speed (POS signal) Crankshaft position sensor (REF) Engine speed (REF signal) Camshaft position sensor (PHASE) Piston position Mass air flow sensor Amount of intake air Engine coolant temperature sensor Engine coolant temperature Heated oxygen sensor 1 (front) Density of oxygen in exhaust gas

ECM func-

tion

NHEC0014

NHEC0014S01

Actuator

Throttle position sensor

Park/neutral position (PNP) switch Gear position Vehicle speed sensor Vehicle speed Ignition switch Start signal Air conditioner switch Air conditioner operation Knock sensor Engine knocking condition Battery Battery voltage Absolute pressure sensor Ambient air barometric pressure Power steering oil pressure switch Power steering operation Heated oxygen sensor 2 (rear)* Density of oxygen in exhaust gas ABS/TCS control unit TCS operation command

*: Under normal conditions, this sensor is not for engine control operation.

Basic Multiport Fuel Injection System

Throttle position Throttle valve idle position

Fuel injection & mixture ratio control

Injectors

The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the ECM memory. The program value is preset by engine operating conditions. These conditions are determined by input signals (for engine speed and intake air) from both the crankshaft position sensor and the mass air flow sensor.

NHEC0014S02

Various Fuel Injection Increase/Decrease Compensation

NHEC0014S03

In addition, the amount of fuel injected is compensated to improve engine performance under various operating conditions as listed below.

I During warm-up I When starting the engine I During acceleration I Hot-engine operation I When selector lever is changed from “N” to “D” I High-load, high-speed operation

I During deceleration I During high engine speed operation

EC-28

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Multiport Fuel Injection (MFI) System (Cont’d)

Mixture Ratio Feedback Control (Closed loop control)

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control. The three way catalyst (Manifold) can then better reduce CO, HC and NOx emissions. This system uses a heated oxygen sensor 1 (front) in the exhaust manifold to monitor if the engine operation is rich or lean. The ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about the heated oxygen sensor 1 (front), refer to EC-192. This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture). This stage is referred to as the closed loop control condition. Heated oxygen sensor 2 (rear) is located downstream of the three way catalyst (Manifold). Even if the switching characteristics of the heated oxygen sensor 1 (front) shift, the air-fuel ratio is controlled to stoichiometric by the signal from the heated oxygen sensor 2 (rear).

Open Loop Control

The open loop system condition refers to when the ECM detects any of the following conditions. Feedback control stops in order to maintain stabilized fuel combustion.

I Deceleration and acceleration I High-load, high-speed operation I Malfunction of heated oxygen sensor 1 (front) or its circuit I Insufficient activation of heated oxygen sensor 1 (front) at low engine coolant temperature I High engine coolant temperature I During warm-up I After shifting from “N” to “D”

I When starting the engine

Mixture Ratio Self-learning Control

The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the heated oxygen sensor 1 (front). This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as originally designed. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic changes during operation (i.e., injector clogging) directly affect mixture ratio. Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is then computed in terms of “injection pulse duration” to automatically compensate for the difference between the two ratios. “Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim includes short term fuel trim and long term fuel trim. “Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical value. The signal from the heated oxygen sensor 1 (front) indicates whether the mixture ratio is RICH or LEAN compared to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an increase in fuel volume if it is lean. “Long term fuel trim” is overall fuel compensation carried out long-term to compensate for continual deviation of the short term fuel trim from the central value. Such deviation will occur due to individual engine differences, wear over time and changes in the usage environment.

NHEC0014S04

SEF336WA

NHEC0014S05

NHEC0014S06

IDX

EC-29

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Multiport Fuel Injection (MFI) System (Cont’d)

Fuel Injection Timing

NHEC0014S07

SEF179U

Two types of systems are used.

Sequential Multiport Fuel Injection System

NHEC0014S0701

Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used when the engine is running.

Simultaneous Multiport Fuel Injection System

NHEC0014S0702

Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of the same width are simultaneously transmitted from the ECM. The six injectors will then receive the signals two times for each engine cycle. This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.

Fuel Shut-off

NHEC0014S08

Fuel to each cylinder is cut off during deceleration or operation of the engine at excessively high speeds.

Electronic Ignition (EI) System

DESCRIPTION Input/Output Signal Chart

Sensor Input Signal to ECM

Crankshaft position sensor (POS) Engine speed (POS signal)

Crankshaft position sensor (REF) Engine speed (REF signal) Camshaft position sensor (PHASE) Piston position Mass air flow sensor Amount of intake air Engine coolant temperature sensor Engine coolant temperature

Throttle position sensor

Vehicle speed sensor Vehicle speed Ignition switch Start signal Knock sensor Engine knocking Park/neutral position (PNP) switch Gear position Battery Battery voltage

Throttle position Throttle valve idle position

ECM func-

tion

Ignition timing control

NHEC0015

NHEC0015S01

Actuator

Power transistor

EC-30

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Electronic Ignition (EI) System (Cont’d)

System Description

SEF742M

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the engine. The ignition timing data is stored in the ECM. This data forms the map shown. The ECM receives information such as the injection pulse width and camshaft position sensor signal. Computing this information, ignition signals are transmitted to the power transistor. e.g., N: 1,800 rpm, Tp: 1.50 msec

A °BTDC

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM.

I At starting I During warm-up I At idle I At low battery voltage I During acceleration

The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition. The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.

NHEC0015S02

Air Conditioning Cut Control

DESCRIPTION

Input/Output Signal Chart

Sensor Input Signal to ECM ECM function Actuator Air conditioner switch Air conditioner “ON” signal Throttle position sensor Throttle valve opening angle Crankshaft position sensor (POS) Engine speed (POS signal) Crankshaft position sensor (REF) Engine speed (REF signal) Engine coolant temperature sensor Engine coolant temperature Ignition switch Start signal Vehicle speed sensor Vehicle speed Refrigerant pressure sensor Refrigerant pressure Power steering oil pressure switch Power steering operation

System Description

This system improves engine operation when the air conditioner is used. Under the following conditions, the air conditioner is turned off.

I When the accelerator pedal is fully depressed. I When cranking the engine. I At high engine speeds.

Air conditioner cut control

NHEC0016

NHEC0016S01

Air conditioner relay

NHEC0016S02

IDX

EC-31

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Air Conditioning Cut Control (Cont’d)

I When the engine coolant temperature becomes excessively high. I When operating power steering during low engine speed or low vehicle speed. I When engine speed is excessively low. I When refrigerant pressure is excessively low or high.

Fuel Cut Control (at no load & high engine speed)

DESCRIPTION Input/Output Signal Chart

Sensor Input Signal to ECM

Vehicle speed sensor Vehicle speed Park/neutral position (PNP) switch Neutral position

ECM func-

tion

NHEC0017

NHEC0017S01

Actuator

Throttle position sensor Throttle position Engine coolant temperature sensor Engine coolant temperature Crankshaft position sensor (POS) Engine speed (POS signal) Crankshaft position sensor (REF) Engine speed (REF signal)

Fuel cut control

Injectors

If the engine speed is above 1,800 rpm with no load (for example, in neutral and engine speed over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed. Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled.

NOTE:

This function is different from deceleration control listed under “Multiport Fuel Injection (MFI) System”, EC-28.

Evaporative Emission System

DESCRIPTION

NHEC0018

SEF569XA

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister. The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the vapor is stored there when the engine is not operating or when refueling to the fuel tank. The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the engine is operating. EVAPcanister purge volume control solenoid valve is controlled by ECM. When the engine

EC-32

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Evaporative Emission System (Cont’d)

operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is proportionally regulated as the air flow increases. EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and idling.

SEF396T

SEF397T

SEF989X

INSPECTION EVAP Canister

Check EVAP canister as follows:

1. Pinch the fresh air hose.

2. Blow air into port A and check that it flows freely out of port B.

Tightening Torque

Tighten EVAP canister as shown in the figure.

Make sure new O-ring is installed properly between EVAPcanister and EVAP canister vent control valve.

Fuel Tank Vacuum Relief Valve (Built into fuel filler cap)

1. Wipe clean valve housing.

2. Check valve opening pressure and vacuum.

Pressure:

15.3 - 20.0 kPa (0.156 - 0.204 kg/cm

Vacuum:

−6.0 to −3.3 kPa (−0.061 to −0.034 kg/cm

−0.48 psi)

3. If out of specification, replace fuel filler cap as an assembly.

CAUTION:

Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.

, 2.22 - 2.90 psi)

NHEC0019

NHEC0019S01

NHEC0019S02

NHEC0019S03

, −0.87 to

SEF943S

IDX

EC-33

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Evaporative Emission System (Cont’d)

SEF462UA

SEF200U

PEF838U

Vacuum Cut Valve and Vacuum Cut Valve Bypass Valve

NHEC0019S04

Refer to EC-582.

Evaporative Emission (EVAP) Canister Purge Volume Control Solenoid Valve

Refer to EC-377.

Fuel Tank Temperature Sensor

Refer to EC-307.

Evap Service Port

Positive pressure is delivered to the EVAP system through the EVAP service port. If fuel vapor leakage in the EVAP system occurs, use a leak detector to locate the leak.

How to Detect Fuel Vapor Leakage

CAUTION:

I Never use compressed air or a high pressure pump. I Do not exceed 4.12 kPa (0.042 kg/cm

in EVAP system.

NOTE:

I Do not start engine. I Improper installation of EVAPservice port adapter to the EVAP

service port may cause a leak.

With CONSULT-II

1) Attach the EVAP service port adapter securely to the EVAP service port.

2) Also attach the pressure pump and hose to the EVAP service port adapter.

3) Turn ignition switch “ON”.

4) Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT MODE” with CONSULT-II.

5) Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.

6) Apply positive pressure to the EVAP system until the pressure indicator reaches the middle of the bar graph.

7) Remove EVAP service port adapter and hose with pressure pump.

8) Locatethe leak using a leak detector.Refer to “EVAPORATIVE EMISSION LINE DRAWING”, EC-36.

, 0.6 psi) of pressure

NHEC0019S05

NHEC0019S06

NHEC0019S07

NHEC0019S08

NHEC0019S0801

PEF917U

EC-34

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Evaporative Emission System (Cont’d)

SEF462UA

SEF254X

Without CONSULT-II

1) Attach the EVAP service port adapter securely to the EVAP service port.

2) Also attach the pressure pump with pressure gauge to the EVAP service port adapter.

3) Apply battery voltage to between the terminals of both EVAP canister vent control valve and vacuum cut valve bypass valve to make a closed EVAP system.

4) To locate the leak, deliver positive pressure to the EVAP system until pressure gauge points reach 1.38 to 2.76 kPa (0.014 to 0.028 kg/cm

5) Remove EVAP service port adapter and hose with pressure pump.

6) Locatethe leak using a leak detector.Refer to “EVAPORATIVE EMISSION LINE DRAWING”, EC-36.

, 0.2 to 0.4 psi).

NHEC0019S0802

IDX

EC-35

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Evaporative Emission System (Cont’d)

EVAPORATIVE EMISSION LINE DRAWING

NHEC0020

SEF996Z

EC-36

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Evaporative Emission System (Cont’d)

EC-37

IDX

SEF253X

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR)

SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR)

NHEC0606S01

SEF206VA

NHEC0606

From the beginning of refueling, the fuel tank pressure goes up. When the pressure reaches the setting value of the refueling control valve (RCV) opening pressure, the RCV is opened.After RCV opens, the air and vapor inside the fuel tank go through refueling EVAP vapor cut valve, RCV and refueling vapor line to the EVAP canister. The vapor is absorbed by the EVAP canister and the air is released to the atmosphere. When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged during driving. The RCV is always closed during driving and the evaporative emission control system is operated the same as conventional system.

WARNING:

When conducting inspections below, be sure to observe the following:

I Put a “CAUTION: INFLAMMABLE” sign in workshop. I Do not smoke while servicing fuel system. Keep open flames and sparks away from work area. I Be sure to furnish the workshop with a CO

fire extinguisher.

SEF830X

EC-38

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

CAUTION:

I Before removing fuel line parts, carry out the following procedures: a) Put drained fuel in an explosion-proof container and put lid on securely. b) Release fuel pressure from fuel line. Refer to “Fuel Pressure Release”, EC-49. c) Disconnect battery ground cable.

I Always replace O-ring when the fuel gauge retainer is removed. I Do not kink or twist hose and tube when they are installed. I Do not tighten hose and clamps excessively to avoid damaging hoses. I After installation, run engine and check for fuel leaks at connection. I Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.

Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

DIAGNOSTIC PROCEDURE Symptom: Fuel Odor from EVAP Canister Is Strong.

1 CHECK EVAP CANISTER

1. Remove EVAP canister with EVAP canister vent control valve attached.

2. Weigh the EVAP canister with EVAP canister vent control valve attached. The weight should be less than 1.8 kg (4.0 lb).

OK or NG

OK © GO TO 2. NG © GO TO 3.

NHEC0606S02

NHEC0606S0201

2 CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

Yes © GO TO 3. No (With CONSULT-II) © GO TO 6. No (Without CONSULT-

II)

3 REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

YesorNo

SEF596U

IDX

EC-39

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

4 CHECK WATER SEPARATOR

1. Check visually for insect nests in the water separator air inlet.

2. Check visually for cracks or flaws in the appearance.

3. Check visually for cracks or flaws in the hose.

4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.

5. In case of NG in items2-4,replace the parts.

NOTE:

I Do not disassemble water separator.

OK or NG

OK © GO TO 5. NG © Replace water separator.

SEF829T

5 DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

EC-40

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

6 CHECK REFUELING EVAP VAPOR CUT VALVE

With CONSULT-II

1. Remove fuel tank. Refer to FE-4, “FUEL SYSTEM.

2. Drain fuel from the tank as follows:

a. Remove fuel feed hose located on the fuel gauge retainer. b. Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other side to a fuel

container.

c. Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-II.

3. Check refueling EVAP vapor cut valve for being stuck to close as follows. Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into the tank.

4. Check EVAP vapor cut valve for being stuck to open as follows.

a. Connect vacuum pump to hose ends A and B using a suitable 3-way connector. b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Put fuel tank upside down. d. Apply vacuum pressure to both hose ends A and B [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

OK or NG

OK © GO TO 8. NG © Replace refueling EVAP vapor cut valve with fuel tank.

SEF968X

EC-41

IDX

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

7 CHECK REFUELING EVAP VAPOR CUT VALVE

Without CONSULT-II

1. Remove fuel tank. Refer to FE-4, “FUEL SYSTEM”.

2. Drain fuel from the tank as follows:

a. Remove fuel gauge retainer. b. Drain fuel from the tank using a hand pump into a fuel container.

3. Check refueling EVAP vapor cut valve for being stuck to close as follows. Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into the tank.

4. Check EVAP vapor cut valve for being stuck to open as follows.

a. Connect vacuum pump to hose ends A and B using a suitable 3-way connector. b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Put fuel tank upside down. d. Apply vacuum pressure to both hose ends A and B [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

OK or NG

OK © GO TO 8. NG © Replace refueling EVAP vapor cut valve with fuel tank.

8 CHECK REFUELING CONTROL VALVE

1. Remove fuel filler cap.

2. Check air continuity between hose ends A and B. Blow air into the hose end B. Air should flow freely into the fuel tank.

3. Blow air into hose end A and check there is no leakage.

4. Apply pressure to both hose ends A and B [20 kPa (150 mmHg, 5.91 inHg)] using a pressure pump and a suitable 3-way connector. Check that there is no leakage.

OK or NG

OK © INSPECTION END NG © Replace refueling control valve with fuel tank.

SEF968X

EC-42

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

Symptom: Cannot Refuel/Fuel Odor From The Fuel Filler Opening Is Strong While Refueling.

1 CHECK EVAP CANISTER

1. Remove EVAP canister with EVAP canister vent control valve attached.

2. Weigh the EVAP canister with EVAP canister vent control valve attached. The weight should be less than 1.8 kg (4.0 lb).

OK or NG

OK © GO TO 2. NG © GO TO 3.

NHEC0606S0202

2 CHECK IF EVAP CANISTER SATURATED WITH WATER

Does water drain from the EVAP canister?

Yes © GO TO 3. No © GO TO 6.

3 REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

SEF596U

YesorNo

EC-43

IDX

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

4 CHECK WATER SEPARATOR

1. Check visually for insect nests in the water separator air inlet.

2. Check visually for cracks or flaws in the appearance.

3. Check visually for cracks or flaws in the hose.

4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.

5. In case of NG in items2-4,replace the parts.

NOTE:

I Do not disassemble water separator.

OK or NG

OK © GO TO 5. NG © Replace water separator.

SEF829T

5 DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and water separator for clogging or poor connection.

6 CHECK VENT HOSES AND VENT TUBES

Check hoses and tubes between EVAP canister and refueling control valve for clogging, kink, looseness and improper connection.

OK or NG

OK © GO TO 7. NG © Repair or replace hoses and tubes.

7 CHECK FILLER NECK TUBE

Check signal line and recirculation line for clogging, dents and cracks.

OK or NG

OK © GO TO 8. NG © Replace filler neck tube.

EC-44

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

8 CHECK REFUELING CONTROL VALVE

1. Remove fuel filler cap.

2. Check air continuity between hose ends A and B. Blow air into the hose end B. Air should flow freely into the fuel tank.

3. Blow air into hose end A and check there is no leakage.

4. Apply pressure to both hose ends A and B [20 kPa (150 mmHg, 5.91 inHg)] using a pressure pump and a suitable 3-way connector. Check that there is no leakage.

OK or NG

OK (With CONSULT-II) © GO TO 9. OK (Without CONSULT-

II) NG © Replace refueling control valve with fuel tank.

9 CHECK REFUELING EVAP VAPOR CUT VALVE

With CONSULT-II

1. Remove fuel tank. Refer to FE-4, “FUEL SYSTEM”.

2. Drain fuel from the tank as follows:

a. Remove fuel feed hose located on the fuel gauge retainer. b. Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other side to a fuel

container.

c. Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT-II.

3. Check refueling EVAP vapor cut valve for being stuck to close as follows. Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into the tank.

4. Check EVAP vapor cut valve for being stuck to open as follows.

a. Connect vacuum pump to hose ends A and B using a suitable 3-way connector. b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Put fuel tank upside down. d. Apply vacuum pressure to both hose ends A and B [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

SEF968X

OK or NG

OK © GO TO 11. NG © Replace refueling EVAP vapor cut valve with fuel tank.

EC-45

IDX

SEF968X

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

10 CHECK REFUELING EVAP VAPOR CUT VALVE

Without CONSULT-II

1. Remove fuel tank. Refer to FE-4, “FUEL SYSTEM”.

2. Drain fuel from the tank as follows:

a. Remove fuel gauge retainer. b. Drain fuel from the tank using a hand pump into a fuel container.

3. Check refueling EVAP vapor cut valve for being stuck to close as follows. Blow air into the refueling EVAP vapor cut valve (from hose end B), and check that the air flows freely into the tank.

4. Check EVAP vapor cut valve for being stuck to open as follows.

a. Connect vacuum pump to hose ends A and B using a suitable 3-way connector. b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

c. Put fuel tank upside down. d. Apply vacuum pressure to both hose ends A and B [−13.3 kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer

remaining open and check that the pressure is applicable.

OK or NG

OK © GO TO 11. NG © Replace refueling EVAP vapor cut valve with fuel tank.

11 CHECK FUEL FILLER TUBE

Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.

OK or NG

OK © GO TO 12. NG © Replace fuel filler tube.

12 CHECK ONE-WAY FUEL VALVE-I

Check one-way valve for clogging.

OK or NG

OK © GO TO 13. NG © Repair or replace one-way fuel valve with fuel tank.

SEF968X

EC-46

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

On Board Refueling Vapor Recovery (ORVR) (Cont’d)

13 CHECK ONE-WAY FUEL VALVE-II

1. Make sure that fuel is drained from the tank.

2. Remove fuel filler tube and hose.

3. Check one-way fuel valve for operation as follows. When a stick is inserted, the valve should open, when removing stick it should close.

Do not drop any material into the tank.

OK or NG

OK © INSPECTION END NG © Replace fuel filler tube or replace one-way fuel valve with fuel tank.

SEF665U

SEF372Q

SEF559A

Positive Crankcase Ventilation

DESCRIPTION

This system returns blow-by gas to the intake manifold. The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake manifold. During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV valve. Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air. The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air passes through the hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve. The flow goes through the hose connection in the reverse direction. On vehicles with an excessively high blow-by, the valve does not meet the requirement. This is because some of the flow will go through the hose connection to the air inlet tubes under all conditions.

INSPECTION PCV (Positive Crankcase Ventilation) Valve

With engine running at idle, remove PCV valve ventilation hose from PCV valve; if the valve is working properly, a hissing noise will be heard as air passes through it and a strong vacuum should be felt immediately when a finger is placed over valve inlet.

NHEC0021

NHEC0022

NHEC0022S01

IDX

SEC137A

EC-47

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Positive Crankcase Ventilation (Cont’d)

ET277

PCV Valve Ventilation Hose

1. Check hoses and hose connections for leaks.

2. Disconnect all hoses and clean with compressed air. If any hose cannot be freed of obstructions, replace.

NHEC0022S02

EC-48

BASIC SERVICE PROCEDURE

Fuel Pressure Release

SEF289X

SEF214Y

Fuel Pressure Release

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

WITH CONSULT-II

1. Turn ignition switch “ON”.

2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-II.

3. Start engine.

4. After engine stalls, crank it two or three times to release all fuel pressure.

5. Turn ignition switch “OFF”.

WITHOUT CONSULT-II

1. Remove fuel pump fuse located in fuse box.

2. Start engine.

3. After engine stalls, crank it two or three times to release all fuel pressure.

4. Turn ignition switch “OFF”.

5. Reinstall fuel pump fuse after servicing fuel system.

NHEC0023

NHEC0023S01

NHEC0023S02

SEF997Z

SEF030Y

Fuel Pressure Check

I When reconnecting fuel line, always use new clamps. I Make sure that clamp screw does not contact adjacent

parts.

I Use a torque driver to tighten clamps. I Use Pressure Gauge to check fuel pressure. I Do not perform fuel pressure check with system operat-

ing. Fuel pressure gauge may indicate false readings.

1. Release fuel pressure to zero.

2. Disconnect fuel tube joint between fuel pressure regurator and injection tube and set fuel pressure check adapter (J44321).

NHEC0024

IDX

EC-49

Fuel Pressure Check (Cont’d)

BASIC SERVICE PROCEDURE

3. Install pressure gauge to the fuel pressure check adapter as shown in the figure.

4. Start engine and check for fuel leakage.

5. Read the indication of fuel pressure gauge.

At idling:

With vacuum hose connected

Approximately 235 kPa (2.4 kg/cm

With vacuum hose disconnected

Approximately 294 kPa (3.0 kg/cm

SEF031Y

If results are unsatisfactory, perform Fuel Pressure Regulator Check.

, 34 psi)

, 43 psi)

SEC015C

SEF718BA

Fuel Pressure Regulator Check

NHEC0025

1. Stop engine and disconnect fuel pressure regulator vacuum hose from vacuum gallery.

2. Plug vacuum gallery with a blind cap.

3. Connect variable vacuum source to fuel pressure regulator.

4. Start engine and read indication of fuel pressure gauge as vacuum is changed.

Fuel pressure should decrease as vacuum increases. If results are unsatisfactory, replace fuel pressure regulator.

EC-50

BASIC SERVICE PROCEDURE

Injector

REMOVAL AND INSTALLATION

1. Release fuel pressure to zero.

2. Remove intake manifold collector. Refer to EM-19, “TIMING CHAIN”.

3. Remove fuel tube assemblies in numerical sequence as shown in the figure at left.

4. Expand and remove clips securing fuel injectors.

5. Extract fuel injectors straight from fuel tubes.

SEF702X

SEF703X

I Be careful not to damage injector nozzles during removal. I Do not bump or drop fuel injectors.

6. Carefully install O-rings, including the one used with the pressure regulator.

I Lubricate O-rings with a smear of engine oil. I Be careful not to damage O-rings with service tools, fin-

ger nails or clips. Do not expand or twist O-rings.

I Discard old clips; replace with new ones.

7. Position clips in grooves on fuel injectors.

I Make sure that protrusions of fuel injectors are aligned

with cutouts of clips after installation.

Injector

NHEC0026

IDX

SEF704XA

8. Align protrusions of fuel tubes with those of fuel injectors. Insert fuel injectors straight into fuel tubes.

9. After properly inserting fuel injectors, check to make sure that fuel tube protrusions are engaged with those of fuel injectors, and that flanges of fuel tubes are engaged with clips.

EC-51

Injector (Cont’d)

BASIC SERVICE PROCEDURE

10. Tighten fuel tube assembly mounting nuts in numerical sequence (indicated in the figure at left) and in two stages.

: Tightening torque N·m (kg-m, ft-lb)

1st stage:

9.3 - 10.8 (1.0 - 1.1, 6.9 - 7.9)

2nd stage:

20.6 - 26.5 (2.1 - 2.7, 16 - 19)

11. Install all parts removed in reverse order of removal.

CAUTION:

SEF705X

After properly connecting fuel tube assembly to injector and fuel hose, check connection for fuel leakage.

How to Check Idle Speed and Ignition Timing

IDLE SPEED

I Using CONSULT-II

Check idle speed in “DATA MONITOR” mode with CONSULT-II.

NHEC0607

NHEC0607S01

SEF058Y

SEF998Z

SEF247Q

IGNITION TIMING

Any of following two methods may be used.

I Method A

a) Attach timing light to loop wire as shown. b) Check ignition timing.

I Method B

a) Remove No. 1 ignition coil.

NHEC0607S02

EC-52

BASIC SERVICE PROCEDURE

How to Check Idle Speed and Ignition Timing (Cont’d)

b) Connect No. 1 ignition coil and No. 1 spark plug with suitable

high-tension wire as shown, and attach timing light clamp to this wire.

c) Check ignition timing.

SEF248Q

SEF572X

SEF311Q

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

PREPARATION

1) Make sure that the following parts are in good order.

I Battery I Ignition system I Engine oil and coolant levels I Fuses I ECM harness connector I Vacuum hoses

NHEC0028

NHEC0028S01

IDX

EC-53

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

I Air intake system

(Oil filler cap, oil level gauge, etc.)

I Fuel pressure I Engine compression I Throttle valve I Evaporative emission system

2) On air conditioner equipped models, checks should be carried out while the air conditioner is “OFF”.

3) On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio, checks should be carried out while shift lever is in “N” position.

4) When measuring “CO” percentage, insert probe more than 40 cm (15.7 in) into tail pipe.

5) Turn off headlamps, heater blower, rear defogger.

6) Keep front wheels pointed straight ahead.

7) Make the check after the cooling fan has stopped.

EC-54

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

Overall Inspection Sequence

NHEC0028S0101

NOTE: If a vehicle contains a part which is operating outside of design specifications with no MIL illumination, the part shall not be replaced prior to emission testing unless it is determined that the part has been tampered with or abused in such a way that the diagnostic system cannot reasonably be expected to detect the resulting malfunction.

SEF554Y

IDX

EC-55

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

INSPECTION PROCEDURE

1 INSPECTION START

1. Visually check the following:

I Air cleaner clogging I Hoses and ducts for leaks I Electrical connectors I Gasket I Throttle valve and throttle position sensor operation

2. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge. Ensure engine stays below 1,000 rpm.

3. Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.

=NHEC0028S02

SEF976U

4. Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG

OK © GO TO 3.

NG © GO TO 2.

2 REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.

3 CHECK TARGET IDLE SPEED

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.

3. Check idle speed.

700±50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

700±50 rpm (in “P” or “N” position)

OK or NG

OK © GO TO 12. NG © GO TO 4.

SEF977U

EC-56

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

4 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-66.

Which is the result CMPLT or INCMP?

CMPLT or INCMP

CMPLT © GO TO 5. INCMP © 1. Follow the construction of “Idle Air Volume Leaning”.

2. GO TO 4.

5 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.

3. Check idle speed.

700±50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

700±50 rpm (in “P” or “N” position)

OK or NG

OK © GO TO 10. NG © GO TO 6.

6 REPLACE IACV-AAC VALVE

Replace IACV-AAC valve.

7 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-66.

Which is the result CMPLT or INCMP?

CMPLT or INCMP

CMPLT © GO TO 8. INCMP © 1. Follow the construction of “Idle Air Volume Learning”.

2. GO TO 4.

8 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.

3. Check idle speed.

700±50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

700±50 rpm (in “P” or “N” position)

OK or NG

OK © GO TO 10. NG © GO TO 9.

EC-57

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

9 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely the case.)

2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to “IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-82.

10 CHECK IGNITION TIMING

1. Start engine and warm it up to normal operating temperature.

2. Check ignition timing at idle using a timing light.

Ignition timing:

15°±5° BTDC (in “P” or “N” position)

OK © GO TO 18. NG © GO TO 11.

11 CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-29, “Installation”.

OK © GO TO 9. NG © 1. Repair the timing chain installation.

2. GO TO 4.

SEF572X

OK or NG

EC-58

BASIC SERVICE PROCEDURE

12 CHECK IGNITION TIMING

1. Start engine and let it idle.

2. Check ignition timing at idle using a timing light.

Ignition timing:

15°±5° BTDC (in “P” or “N” position)

OK © GO TO 18. NG © GO TO 13.

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

SEF572X

OK or NG

13 PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-66.

Which is the result CMPLT or INCMP?

CMPLT or INCMP

CMPLT © GO TO 14. INCMP © 1. Follow the construction of “Idle Air volume Learning”.

2. GO TO 13.

14 CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.

3. Check idle speed.

700±50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.

2. Check idle speed.

700±50 rpm (in “P” or “N” position)

OK or NG

OK © GO TO 16. NG © GO TO 15.

15 CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely the case.)

2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to “IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-82.

EC-59

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

16 CHECK IGNITION TIMING AGAIN

Check ignition timing again. Refer to Test No. 12.

OK or NG

OK © GO TO 18. NG © GO TO 17.

17 CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-29, “Installation”.

OK or NG

OK © GO TO 15. NG © 1. Repair the timing chain installation.

2. GO TO 13.

18 ERASE UNNECESSARY DTC

After this inspection, unnecessary DTC No. might be displayed. Erase the stored memory in ECM and TCM (Transmission control module). Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-80 and AT-38, “HOW TO ERASE DTC”.

With CONSULT-II © GO TO 19. Without CONSULT-II © GO TO 20.

19 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL

With CONSULT-II

1. Run engine at about 2,000 rpm for about 2 minutes under no-load.

2. See “HO2S1 MNTR (B2)” in “DATA MONITOR” mode.

3. Running engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

OK or NG

OK © GO TO 23. NG (Monitor does not

fluctuate.) NG (Monitor fluctuates

less than 5 times.)

SEF999Z

EC-60

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

20 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL

Without CONSULT-II

1. Run engine at about 2,000 rpm for about 2 minutes under no-load.

2. Set voltmeter probe between ECM terminal 62 and ground.

3. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000 rpm.

1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V

OK or NG

OK © GO TO 23. NG (Voltage does not

fluctuate.) NG (Voltage fluctuates

less than 5 times.)

21 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL

With CONSULT-II

1. Stop engine.

2. Replace heated oxygen sensor 1 (front) (bank 2).

3. Start engine and warm it up to normal operating temperature.

4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.

5. See “HO2S1 MNTR (B2)” in “DATA MONITOR” mode.

6. Running engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

1 time: RICH → LEAN → RICH 2 times: RICH → LEAN → RICH → LEAN → RICH

Without CONSULT-II

1. Stop engine.

2. Replace heated oxygen sensor 1 (front) (bank 2).

3. Start engine and warm it up to normal operating temperature.

4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.

5. Set voltmeter probe between ECM terminal 62 and ground.

6. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000

rpm.

1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V

OK or NG

OK (With CONSULT-II) © GO TO 23. OK (Without CONSULT-

II) NG © GO TO 22.

22 DETECT MALFUNCTIONING PART

Check the following.

1. Check fuel pressure regulator. Refer to EC-50.

2. Check mass air flow sensor and its circuit. Refer to EC-152.

3. Check injector and its circuit. Refer to EC-608. Clean or replace if necessary.

4. Check engine coolant temperature sensor and its circuit. Refer to EC-187.

5. Check ECM function by substituting another known-good ECM. (ECM may be the cause of a problem, but this is rarely the case.)

EC-61

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

23 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1) SIGNAL

With CONSULT-II

1. See “HO2S1 MNTR (B1)” in “DATA MONITOR” mode.

2. Maintaining engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

SEF999Z

OK or NG

OK © INSPECTION END NG (Monitor does not

fluctuate.) NG (Monitor fluctuates

less than 5 times.)

24 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1) SIGNAL

Without CONSULT-II

1. Set voltmeter probe between ECM terminal 63 and ground.

2. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000 rpm.

1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V

OK © INSPECTION END NG (Voltage does not

fluctuate.) NG (Voltage fluctuates

less than 5 times.)

OK or NG

EC-62

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

25 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1) SIGNAL

With CONSULT-II

1. Stop engine.

2. Replace heated oxygen sensor 1 (front) (bank 1).

3. Start engine and warm it up to normal operating temperature.

4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.

5. See “HO2S1 MNTR (B1)” in “DATA MONITOR” mode.

6. Maintaining engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

1 time: RICH → LEAN → RICH 2 times: RICH → LEAN → RICH → LEAN → RICH

Without CONSULT-II

1. Stop engine.

2. Replace heated oxygen sensor 1 (front) (bank 1).

3. Start engine and warm it up to normal operating temperature.

4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.

5. Set voltmeter probe between ECM terminal 63 and ground.

6. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000 rpm.

1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V

OK or NG

OK © INSPECTION END NG © GO TO 26.

26 DETECT MALFUNCTIONING PART

Check the following.

I Check fuel pressure regulator. Refer to EC-50. I Check mass air flow sensor and its circuit. Refer to EC-152. I Check injector and its circuit. Refer to EC-608.

Clean or replace if necessary.

I Check engine coolant temperature sensor and its circuit. Refer to EC-187. I Check ECM function by substituting another known-good ECM.

(ECM may be the cause of a problem, but this is rarely the case.)

27 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1) HARNESS

1. Turn off engine and disconnect battery ground cable.

2. Disconnect ECM harness connector.

3. Disconnect heated oxygen sensor 1 (front) (bank 1) harness connector.

4. Check harness continuity between ECM terminal 63 and heated oxygen sensor 1 (front) (bank 1) harness connector terminal 1. Refer to Wiring Diagram, EC-195.

Continuity should exist.

OK or NG

OK © GO TO 30. NG © GO TO 28.

IDX

EC-63

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

28 CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) HARNESS

1. Turn off engine and disconnect battery ground cable.

2. Disconnect ECM harness connector.

3. Disconnect heated oxygen sensor 1 (front) (bank 2) harness connector.

4. Check harness continuity between ECM terminal 62 and heated oxygen sensor 1 (front) (bank 2) harness connector terminal 1. Refer to Wiring Diagram, EC-196.

Continuity should exist.

OK or NG

OK © GO TO 30. NG © GO TO 29.

29 REPAIR OR REPLACE

Repair or replace harness between ECM and heated oxygen sensor 1 (front).

30 PREPARATION FOR “CO” % CHECK

With CONSULT-II

1. Reconnect ECM harness connector.

2. Turn ignition switch “ON”.

3. Select “ENG COOLANT TEMP” in “ACTIVE TEST” mode.

4. Set “ENG COOLANT TEMP” to 5°C (41°F) by touching “DWN” and “Qd”.

Without CONSULT-II

1. Disconnect ECM harness connector.

2. Disconnect engine coolant temperature sensor harness connector.

3. Connect a resistor (4.4 kΩ) between terminals of engine coolant temperature sensor harness connector.

SEF172Y

SEF982UA

EC-64

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

31 CHECK “CO” %

1. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.

3. Check “CO” %.

Idle CO:3-11%

Without CONSULT-II

After checking CO%,

a. Disconnect the resistor from terminals of engine coolant temperature sensor. b. Connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.

OK or NG

OK © GO TO 32. NG © GO TO 33.

32 CHECK HEATED OXYGEN SENSOR 1 (FRONT) SIGNAL

With CONSULT-II

1. Stop engine.

2. Replace heated oxygen sensor 1 (front).

3. Start engine and warm it up to normal operating temperature.

4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.

5. See “HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode.

1 time: RICH → LEAN → RICH 2 times: RICH → LEAN → RICH → LEAN → RICH

Without CONSULT-II

1. Stop engine.

2. Replace heated oxygen sensor 1 (front).

3. Start engine and warm it up to normal operating temperature.

4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.

5. Set voltmeter probe between ECM terminal 63 or 62 and ground.

6. Make sure that voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000 rpm.

1 time: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V 2 times: 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V

OK or NG

OK © GO TO 3. NG © GO TO 33.

SEF976U

SEF978U

IDX

EC-65

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

33 DETECT MALFUNCTIONING PART

Check the following.

I Connect heated oxygen sensor 1 (front) harness connectors to heated oxygen sensors 1 (front). I Check fuel pressure regulator. Refer to EC-50. I Check mass air flow sensor and its circuit. Refer to EC-152. I Check injector and its circuit. Refer to EC-608.

Clean or replace if necessary.

I Check engine coolant temperature sensor and its circuit. Refer to EC-187. I Check ECM function by substituting another known-good ECM.

(ECM may be the cause of a problem, but this is rarely the case.)

Idle Air Volume Learning

DESCRIPTION

“Idle Air Volume Learning” is an operation to learn the idle air volume that keeps each engine within the specific range. It must be performed under any of the following conditions:

I Each time IACV-AAC valve, throttle body or ECM is replaced. I Idle speed or ignition timing is out of specification.

NHEC0642

NHEC0642S01

SEF452Y

SEF454Y

SEF455Y

PRE-CONDITIONING

NHEC0642S02

Before performing “IdleAir Volume Learning”, make sure that all of the following conditions are satisfied. Learning will be cancelled if any of the following conditions are missed for even a moment.

I Battery voltage: More than 12.9V (At idle) I Engine coolant temperature: 70 - 99°C (158 - 210°F) I PNP switch: ON I Electric load switch: OFF

(Air conditioner, headlamp, rear window defogger)

On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light only small lamps.

I Cooling fan motor: Not operating I Steering wheel: Neutral (Straight-ahead position) I Vehicle speed: Stopped I Transmission: Warmed-up

For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/T” system indicates less than 0.9V. For models without CONSULT-II, drive vehicle for 10 minutes.

OPERATION PROCEDURE

With CONSULT-II

NHEC0642S03

NHEC0642S0301

1. Turn ignition switch “ON” and wait at least 1 second.

2. Turn ignition switch “OFF” and wait at least 10 seconds.

3. Start engine and warm it up to normal operating temperature.

4. Check that all items listed under the topic “PRE-CONDITIONING” (previously mentioned) are in good order.

5. Turn ignition switch “OFF” and wait at least 10 seconds.

6. Start the engine and let it idle for at least 30 seconds.

7. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.

8. Touch “START” and wait 20 seconds.

9. Make sure that “CMPLT” is displayed on CONSULT-II screen. If “INCMP” is displayed, “Idle Air Volume Learning” will not be carried out successfully. In this case, find the cause of the problem by referring to the NOTE below.

10. Rev up the engine two or three times. Make sure that idle

EC-66

BASIC SERVICE PROCEDURE

speed and ignition timing are within specifications.

ITEM SPECIFICATION

Idle Air Volume Learning (Cont’d)

SEC001C

Idle speed 700±50 rpm (in “P” or “N” position) Ignition timing 15°±5° BTDC (in “P” or “N” position)

Without CONSULT-II

1. Turn ignition switch “ON” and wait at least 1 second.

2. Turn ignition switch “OFF” and wait at least 10 seconds.

3. Start engine and warm it up to normal operating temperature.

4. Check that all items listed under the topic “PRE-CONDITIONING” (previously mentioned) are in good order.

5. Turn ignition switch “OFF” and wait at least 10 seconds.

6. Start the engine and let it idle for at least 30 seconds.

7. Disconnect throttle position sensor harness connector (brown), then reconnect it within 5 seconds.

8. Wait 20 seconds.

9. Make sure that idle speed is within specifications. If not, the result will be incomplete. In this case, find the cause of the problem by referring to the NOTE below.

10. Rev up the engine two or three times. Make sure that idle speed and ignition timing are within specifications.

ITEM SPECIFICATION

NHEC0642S0302

Idle speed 700±50 rpm (in “P” or “N” position) Ignition timing 15°±5° BTDC (in “P” or “N” position)

NOTE: If idle air volume learning cannot be performed successfully, proceed as follows:

1) Check that throttle valve is fully closed.

2) Check PCV valve operation.

3) Check that downstream of throttle valve is free from air

leakage.

4) Adjust closed throttle position switch and reset memory. (Refer to Basic Inspection, EC-109.)

5) When the above three items check out OK, engine component parts and their installation condition are questionable. Check and eliminate the cause of the problem. It is useful to perform “TROUBLE DIAGNOSIS — SPECIFICATION VALUE”, EC-140.

6) If any of the following conditions occur after the engine has started, eliminate the cause of the problem and perform “Idle air volume learning” all over again:

I Engine stalls. I Erroneous idle. I Blown fuses related to the IACV-AAC valve system.

IDX

EC-67

Introduction

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Introduction

NHEC0029

The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actuators. The ECM also records various emission-related diagnostic information including:

Emission-related diagnostic information SAE Mode Diagnostic Trouble Code (DTC) Mode 3 of SAE J1979 Freeze Frame data Mode 2 of SAE J1979 System Readiness Test (SRT) code Mode 1 of SAE J1979 1st Trip Diagnostic Trouble Code (1st Trip DTC) Mode 7 of SAE J1979 1st Trip Freeze Frame data Test values and Test limits Mode 6 of SAE J1979

The above information can be checked using procedures listed in the table below.

X: Applicable —: Not applicable

DTC 1st trip DTC

CONSULT-II X X X X X — GST X X*1 X — X X

*1: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.

Freeze Frame

data

1st trip Freeze

Frame data

SRT code Test value

The malfunction indicator lamp (MIL) on the instrument panel lights up when the same malfunction is detected in two consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to EC-122.)

Two Trip Detection Logic

When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the ECM memory. The MIL will not light up at this stage. <1st trip> If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in the ECM memory, and the MIL lights up. The MIL lights up at the same time when the DTC is stored. <2nd trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed during vehicle operation. Specific on board diagnostic items will cause the ECM to light up or blink the MIL, and store DTC and Freeze Frame data, even in the 1st trip, as shown below.

Items

Coolant overtemperature enrichment protection — DTC: P0217

Misfire (Possible three way catalyst damage) — DTC: P0300 P0306 is being detected

Closed loop control — DTC: P1148, P1168

MIL DTC 1st trip DTC

1st trip 2nd trip

Blinking Lighting up Blinking

— X — —X—X—

X — ————X—

—— X ——X——

— X — —X—X—

Lighting

1st trip

displaying

X: Applicable —: Not applicable

2nd trip

displaying

1st trip

displaying

NHEC0030

2nd trip

displaying

Fail-safe items (Refer to EC-122.) — X — — X*1 — X*1 — Except above — — — X — X X X

*1: Except “ECM”

EC-68

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information

DTC AND 1ST TRIP DTC

The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip DTC will not be displayed. If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. The MIL will not light up (two trip detection logic). If the same malfunction is not detected in the 2nd trip (meeting the required driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the 2nd trip, both the 1st trip DTC and DTC are stored in the ECM memory and the MIL lights up. In other words, the DTC is stored in the ECM memory and the MIL lights up when the same malfunction occurs in two consecutive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd trips, only the 1st trip DTC will continue to be stored. For malfunctions that blink or light up the MIL during the 1st trip, the DTC and 1st trip DTC are stored in the ECM memory. Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-80. For malfunctions in which 1st trip DTCs are displayed, refer to EC-78. These items are required by legal regulations to continuously monitor the system/component. In addition, the items monitored non-continuously are also displayed on CONSULT-II. 1st trip DTC is specified in Mode 7 of SAE J1979. 1st trip DTC detection occurs without lighting up the MIL and therefore does not warn the driver of a problem. However, 1st trip DTC detection will not prevent the vehicle from being tested, for example during Inspection/Maintenance (I/M) tests. When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame data as specified in “Work Flow” procedure Step II, refer to EC-107. Then perform “DTC Confirmation Procedure” or “Overall Function Check” to try to duplicate the problem. If the malfunction is duplicated, the item requires repair.

NHEC0031

NHEC0031S01

How to Read DTC and 1st Trip DTC

DTC and 1st trip DTC can be read by the following methods.

With CONSULT-II With GST

CONSULT-II or GST (Generic Scan Tool) Examples: P0340, P1320, P0705, P0750, etc. These DTCs are prescribed by SAE J2012. (CONSULT-II also displays the malfunctioning component or system.)

I 1st trip DTC No. is the same as DTC No. I Output of a DTC indicates a malfunction. However, GST does not indicate whether the malfunction

is still occurring or has occurred in the past and has returned to normal. CONSULT-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if available) is recommended.

A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunction is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. Time data indicates how many times the vehicle was driven after the last detection of a DTC. If the DTC is being detected currently, the time data will be “0”. If a 1st trip DTC is stored in the ECM, the time data will be “[1t]”.

NHEC0031S0101

IDX

SEF992X

FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA

The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant temperature, short term fuel trim, long term fuel trim, engine speed, vehicle speed and absolute pressure at the moment a malfunction is detected. Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.

NHEC0031S02

EC-69

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II or GST. The 1st trip freeze frame data can only be displayed on the CONSULT-II screen, not on the GST. For details, see EC-93. Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once freeze frame data (2nd trip detection/MIL on) is stored in the ECM memory, 1st trip freeze frame data is no longer stored. Remember, only one set of freeze frame data can be stored in the ECM. The ECM has the following priorities to update the data.

Priority Items

Freeze frame data Misfire — DTC: P0300 - P0306

2 Except the above items (Includes A/T related items) 3 1st trip freeze frame data

For example, the EGR malfunction (Priority: 2) was detected and the freeze frame data was stored in the 2nd trip. After that when the misfire (Priority: 1) is detected in another trip, the freeze frame data will be updated from the EGR malfunction to the misfire. The 1st trip freeze frame data is updated each time a different malfunction is detected. There is no priority for 1st trip freeze frame data. However, once freeze frame data is stored in the ECM memory, 1st trip freeze data is no longer stored (because only one freeze frame data or 1st trip freeze frame data can be stored in the ECM). If freeze frame data is stored in the ECM memory and freeze frame data with the same priority occurs later, the first (original) freeze frame data remains unchanged in the ECM memory. Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM memory is erased. Procedures for clearing the ECM memory are described in “HOW TO ERASE EMISSIONRELATED DIAGNOSTIC INFORMATION”, EC-80.

Fuel Injection System Function — DTC: P0171, P0172, P0174, P0175

SYSTEM READINESS TEST (SRT) CODE

System Readiness Test (SRT) code is specified in Mode 1 of SAE J1979. As part of an enhanced emissions test for Inspection & Maintenance (I/M), certain states require the status of SRT be used to indicate whether the ECM has completed self-diagnosis of major emission systems and components. Completion must be verified in order for the emissions inspection to proceed. If a vehicle is rejected for a State emissions inspection due to one or more SRT items indicating “INCMP”, use the information in this Service Manual to set the SRT to “CMPLT”.

In most cases the ECM will automatically complete its self-diagnosis cycle during normal usage, and the SRT status will indicate “CMPLT” for each application system. Once set as “CMPLT”, the SRT status remains “CMPLT” until the self-diagnosis memory is erased. Occasionally, certain portions of the self-diagnostic test may not be completed as a result of the customer’s normal driving pattern; the SRT will indicate “INCMP” for these items.

NOTE:

The SRT will also indicate “INCMP” if the self-diagnosis memory is erased for any reason or if the ECM memory power supply is interrupted for several hours.

If, during the state emissions inspection, the SRT indicates “CMPLT” for all test items, the inspector will continue with the emissions test. However, if the SRT indicates “INCMP” for one or more of the SRT items the vehicle is returned to the customer untested.

NOTE:

If MIL is “ON” during the state emissions inspection, the vehicle is also returned to the customer untested even though the SRT indicates “CMPLT” for all test items. Therefore, it is important to check SRT (“CMPLT”) and DTC (No DTCs) before the inspection.

NHEC0031S03

EC-70

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

SRT Item

The table below shows required self-diagnostic items to set the SRT to “CMPLT”.

SRT item

(CONSULT-II indica-

tion) CATALYST 3 Three way catalyst function P0420, P0430 EVAP SYSTEM 2 EVAP control system (small leak) (negative pressure) P0440

HO2S 3 Heated oxygen sensor 1 (front) (circuit) P0130, P0150

Perfor-

mance Pri-

ority*2

— EVAP control system (small leak) (positive pressure) P1440*1

3 EVAP control system purge flow monitoring P1447

Required self-diagnostic items to set the SRT to “CMPLT”

Heated oxygen sensor 1 (front) (lean shift monitoring) P0131, P0151 Heated oxygen sensor 1 (front) (rich shift monitoring) P0132, P0152 Heated oxygen sensor 1 (front) (response monitoring) P0133, P0153 Heated oxygen sensor 1 (front) (high voltage) P0134, P0154 Heated oxygen sensor 2 (rear) (min. voltage monitoring) P0137, P0157 Heated oxygen sensor 2 (rear) (max. voltage monitoring) P0138, P0158 Heated oxygen sensor 2 (rear) (response monitoring) P0139, P0159 Heated oxygen sensor 2 (rear) high voltage) P0140, P0160

Corresponding

DTC No.

=NHEC0031S0310

HO2S HTR 3 Heated oxygen sensor 1 heater (front) P0135, P0155

Heated oxygen sensor 2 heater (rear) P0141, P0161

*1: P1440 [EVAPcontrolsystem(smallleak) (positive pressure) diagnosis] is one type of SRTrelateddiagnosis.Thisdiagnosis, however, does not contribute to setting the SRT as “CMPLT”, when no malfunction exists in the EVAP system. Therefore, P0440 must be used instead of P1440.

*2: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for models with CONSULT-II.

IDX

EC-71

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

SRT Set Timing

=NHEC0031S0311

SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRTis done regardless of whether the result is OK or NG. The set timing is different between OK and NG results and is shown in the table below.

Example

Self-diagnosis result

All OK Case 1 P0400 OK (1) — (1) OK (2) — (2)

Case 2 P0400 OK (1) — (1) — (1) — (1)

NG exists Case 3 P0400 OK OK — —

Diagnosis

P0402 OK (1) — (1) — (1) OK (2) P1402 OK (1) OK (2) — (2) — (2)

SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”

P0402 — (0) — (0) OK (1) — (1) P1402 OK (1) OK (2) — (2) — (2)

SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”

P0402 ————

P1402 NG — NG

+ ON , OFF + ON , OFF + ON , OFF + ON ,

Ignition cycle

(Consecutive

NG)

(1st trip)

DTC

SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”

OK: Self-diagnosis is carried out and the result is OK. NG: Self-diagnosis is carried out and the result is NG. —: Self-diagnosis is not carried out.

When all SRT related self-diagnoses showed OK results in a single cycle (Ignition OFF-ON-OFF), the SRT

1st trip DTC — 1st trip DTC

(= MIL “ON”)

will indicate “CMPLT”. , Case 1 above When all SRT related self-diagnoses showed OK results through several different cycles, the SRT will indicate “CMPLT” at the time the respective self-diagnoses have at least one OK result. , Case 2 above If one or more SRT related self-diagnoses showed NG results in 2 consecutive cycles, the SRT will also indicate “CMPLT”. , Case 3 above The table above shows that the minimum number of cycles for setting SRT as “INCMP” is one (1) for each self-diagnosis (Case1&2)ortwo(2)foroneofself-diagnoses (Case 3). However, in preparation for the state emissions inspection, it is unnecessary of each self-diagnosis to be executed twice (Case 3) for the following reasons:

I The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result. I The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results. I When, during SRT driving pattern, 1st trip DTC (NG) is detected prior to “CMPLT” of SRT, the self-diag-

nosis memory must be erased from ECM after repair.

I If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.

NOTE:

SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out prior to the state emission inspection even though the SRT indicates “CMPLT”.

DTC

SRT Service Procedure

NHEC0031S0312

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review the flowchart diagnostic sequence on the next page.

EC-72

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

*1 EC-69 *2 EC-73 *3 EC-74

SEF573XA

How to Display SRT Code

With CONSULT-II

Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with CONSULT-II. For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-II screen; for items whose SRT codes are not set, “INCMP” is displayed.

With GST

Selecting Mode 1 with GST (Generic Scan Tool) A sample of CONSULT-II display for SRT code is shown below. “INCMP” means the self-diagnosis is incomplete and SRT is not set. “CMPLT” means the self-diagnosis is complete and SRT is set.

NHEC0031S0301

EC-73

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

SEF935Z

How to Set SRT Code

To set all SRTcodes, self-diagnosis for the items indicated above must be performed one or more times. Each diagnosis may require a long period of actual driving under various conditions.

With CONSULT-II

Perform corresponding DTC Confirmation Procedure one by one based on “Performance Priority” in the table on EC-71.

Without CONSULT-II

The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The driving pattern should be performed one or more times to set all SRT codes.

NHEC0031S0302

EC-74

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

Driving Pattern

NHEC0031S0303

IDX

EC-75

SEF947Y

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

I The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driv-

ing habits, etc. Zone A refers to the range where the time required, for the diagnosis under normal conditions*, is the shortest. Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed within zone A.

*: Normal conditions refer to the following:

− Sea level

− Flat road

− Ambient air temperature: 20 - 30°C (68 - 86°F)

− Diagnosis is performed as quickly as possible under normal conditions. Under different conditions [For example: ambient air temperature other than 20 - 30°C (68 - 86°F)], diagnosis may also be performed.

Pattern 1:

I The engine is started at the engine coolant temperature of −10 to 35°C (14 to 95°F)

(where the voltage between the ECM terminal 70 and ground is 3.0 - 4.3V).

I The engine must be operated at idle speed until the engine coolant temperature is greater than 70°C

(158°F) (where the voltage between the ECM terminal 70 and ground is lower than 1.4V).

I The engine is started at the fuel tank temperature of warmer than 0°C (32°F) (where the voltage

between the ECM terminal 92 and ground is less than 4.1V).

Pattern 2: I When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.

In this case, the time required for diagnosis may be extended.

Pattern 3: I The driving pattern outlined in *2 must be repeated at least 3 times. Pattern 4:

I Tests are performed after the engine has been operated for at least 17 minutes. I The accelerator pedal must be held very steady during steady-state driving. I If the accelerator pedal is moved, the test must be conducted all over again.

*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH) again.

*2: Operate the vehicle in the following driving pattern.

1) Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.

2) Repeat driving pattern shown below at least 10 times.

I During acceleration, hold the accelerator pedal as steady as possible.

SEF414S

*3: Checking the vehicle speed with GST is advised.

Suggested Transmission Gear Position for A/T Models

Set the selector lever in the “D” position with the overdrive switch turned ON.

TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)

The following is the information specified in Mode 6 of SAE J1979. The test value is a parameter used to determine whether a system/circuit diagnostic test is “OK” or “NG” while being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the

NHEC0031S04

EC-76

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

maximum or minimum value and is compared with the test value being monitored. Items for which these data (test value and test limit) are displayed are the same as SRT code items (30 test items). These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be displayed on the GST screen.

X: Applicable —: Not applicable

SRT item Self-diagnostic test item

Three way catalyst function

(Right bank)

CATALYST

Three way catalyst function

(Left bank)

EVAP control system

(Small leak)

EVAP SYSTEM

EVAP control system purge flow

monitoring

Heated oxygen sensor 1 (front)

(bank 1)

Heated oxygen sensor 1 (front)

(bank 2)

HO2S

Test value (GST display)

Test limit Application

TID CID

01H 01H Max. X

03H 02H Max. X

05H 03H Max. X

06H 83H Min. X

09H 04H Max. X 0AH 84H Min. X

0BH 04H Max. X 0CH 04H Max. X 0DH 04H Max. X

11H 05H Max. X

12H 85H Min. X

13H 05H Max. X

14H 05H Max. X

15H 05H Max. X

HO2S HTR

Heated oxygen sensor 2 (rear)

(bank 1)

Heated oxygen sensor 2 (rear)

(bank 2)

Heated oxygen sensor 1 heater (front)

(bank 1)

Heated oxygen sensor 1 heater (front)

(bank 2)

Heated oxygen sensor 2 heater (rear)

(bank 1)

Heated oxygen sensor 2 heater (rear)

(bank 2)

19H 86H Min. X 1AH 86H Min. X 1BH 06H Max. X 1CH 06H Max. X

21H 87H Min. X

22H 87H Min. X

23H 07H Max. X

24H 07H Max. X

29H 08H Max. X 2AH 88H Min. X 2BH 09H Max. X 2CH 89H Min. X 2DH 0AH Max. X 2EH 8AH Min. X 2FH 0BH Max. X

30H 8BH Min. X

IDX

EC-77

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

X: Applicable —: Not applicable

Items

(CONSULT-II screen terms)

NO DTC IS DETECTED. FURTHER TESTING MAY BE REQUIRED.

MAF SEN/CIRCUIT P0100 — — X EC-152 ABSL PRES SEN/CIRC P0105 — — X EC-160 AIR TEMP SEN/CIRC P0110 — — X EC-166 COOLANT T SEN/CIRC P0115 — — X EC-171 THRTL POS SEN/CIRC P0120 — — X EC-176 *COOLAN T SEN/CIRC P0125 — — X EC-187 HO2S1 (B1) P0130 X X X*2 EC-192 HO2S1 (B1) P0131 X X X*2 EC-202 HO2S1 (B1) P0132 X X X*2 EC-210 HO2S1 (B1) P0133 X X X*2 EC-218 HO2S1 (B1) P0134 X X X*2 EC-231

DTC*1 SRT code

P0000 ————

Test value/ Test

limit

(GST only)

1st trip DTC*1 Reference page

NHEC0031S05

HO2S1 HTR (B1) P0135 X X X*2 EC-239 HO2S2 (B1) P0137 X X X*2 EC-246 HO2S2 (B1) P0138 X X X*2 EC-256 HO2S2 (B1) P0139 X X X*2 EC-266 HO2S2 (B1) P0140 X X X*2 EC-276 HO2S2 HTR (B1) P0141 X X X*2 EC-285

HO2S1 (B2) P0150 X X X*2 EC-192 HO2S1 (B2) P0151 X X X*2 EC-202 HO2S1 (B2) P0152 X X X*2 EC-210 HO2S1 (B2) P0153 X X X*2 EC-218 HO2S1 (B2) P0154 X X X*2 EC-231 HO2S1 HTR (B2) P0155 X X X*2 EC-239 HO2S2 (B2) P0157 X X X*2 EC-246 HO2S2 (B2) P0158 X X X*2 EC-256 HO2S2 (B2) P0159 X X X*2 EC-266 HO2S2 (B2) P0160 X X X*2 EC-276 HO2S2 HTR (B2) P0161 X X X*2 EC-285 FUEL SYS-LEAN/BK1 P0171 — — X EC-292 FUEL SYS-RICH/BK1 P0172 — — X EC-300 FUEL SYS-LEAN/BK2 P0174 — — X EC-292 FUEL SYS-RICH/BK2 P0175 — — X EC-300 FUEL TEMP SEN/CIRC P0180 — — X EC-307

EC-78

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

Items

(CONSULT-II screen terms)

ENG OVER TEMP P0217 — — X EC-312 MULTI CYL MISFIRE P0300 — — X EC-330 CYL 1 MISFIRE P0301 — — X EC-330 CYL 2 MISFIRE P0302 — — X EC-330 CYL 3 MISFIRE P0303 — — X EC-330 CYL 4 MISFIRE P0304 — — X EC-330 CYL 5 MISFIRE P0305 — — X EC-330 CYL 6 MISFIRE P0306 — — X EC-330 KNOCK SEN/CIRC-B1 P0325 — — — EC-338 CKP SEN/CIRCUIT P0335 — — X EC-343 CMP SEN/CIRCUIT P0340 — — X EC-351 TW CATALYST SYS-B1 P0420 X X X*2 EC-357 TW CATALYST SYS-B2 P0430 X X X*2 EC-357 EVAP SMALL LEAK P0440 X X X*2 EC-362 PURG VOLUME CONT/V P0443 — — X EC-377

DTC*1 SRT code

Test value/ Test

limit

(GST only)

1st trip DTC*1 Reference page

VENT CONTROL VALVE P0446 — — X EC-383 EVAPO SYS PRES SEN P0450 — — X EC-390 EVAP GROSS LEAK P0455 X X X*2 EC-402 FUEL LV SE (SLOSH) P0460 — — X EC-415 FUEL LEVEL SENSOR P0461 — — X EC-419 FUEL LEVEL SEN/CIRC P0464 — — X EC-421

VEH SPEED SEN/CIRC P0500 — — X EC-425 IACV/AAC VLV/CIRC P0505 — — X EC-429 CLOSED TP SW/CIRC P0510 — — X EC-438 A/T COMM LINE P0600 — — — EC-446 ECM P0605 — — X EC-449 PNP SW/CIRC P0705 — — X AT-102 ATF TEMP SEN/CIRC P0710 — — X AT-108 VEH SPD SEN/CIR AT P0720 — — X AT-114 ENGINE SPEED SIG P0725 — — X AT-119 A/T 1ST GR FNCTN P0731 — — X AT-124 A/T 2ND GR FNCTN P0732 — — X AT-130

IDX

A/T 3RD GR FNCTN P0733 — — X AT-136 A/T 4TH GR FNCTN P0734 — — X AT-142 TCC SOLENOID/CIRC P0740 — — X AT-151 A/T TCC S/V FNCTN P0744 — — X AT-156 L/PRESS SOL/CIRC P0745 — — X AT-166

EC-79

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

Items

(CONSULT-II screen terms)

SFT SOL A/CIRC P0750 — — X AT-172 SFT SOL B/CIRC P0755 — — X AT-177 THERMOSTAT FNCTN P1126 — — X EC-451 SWIRL CONT SOL/V P1130 — — X EC-453 CLOSED LOOP-B1 P1148 — — X EC-476 SWL CON VC SW/CIRC P1165 — — X EC-478 CLOSED LOOP-B2 P1168 — — X EC-476 TCS C/U FUN TN P1211 — — X EC-484 TCS CIRC P1212 — — X EC-486 ENG OVER TEMP P1217 — — X EC-489 IGN SIGNAL-PRIMARY P1320 — — X EC-506 CKP SEN (REF)/CIRC P1335 — — X EC-517 CKP SENSOR (COG) P1336 — — X EC-523 EVAP SMALL LEAK P1440 X X X*2 EC-531 PURG VOLUME CONT/V P1444 — — X EC-533

DTC*1 SRT code

Test value/ Test

limit

(GST only)

1st trip DTC*1 Reference page

VENT CONTROL VALVE P1446 — — X EC-545 EVAP PURG FLOW/MON P1447 X X X*2 EC-553 VENT CONTROL VALVE P1448 — — X EC-564 FUEL LEVEL SEN/CIRC P1464 — — X EC-573 VC/V BYPASS/V P1490 — — X EC-576 VC CUT/V BYPASS/V P1491 — — X EC-582

A/T DIAG COMM LINE P1605 — — X EC-594 TP SEN/CIRC A/T P1705 — — X AT-182 P-N POS SW/CIRCUIT P1706 — — X EC-597 O/R CLTCH SOL/CIRC P1760 — — X AT-191

*1: 1st trip DTC No. is the same as DTC No. *2: These are not displayed with GST.

NOTE:

Regarding A33 models, “-B1” and “BK1” indicate right bank and “-B2” and “BK2” indicate left bank.

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION How to Erase DTC ( With CONSULT-II)

NOTE: If the DTC is not for A/T related items (see EC-8), skip steps 2 through 4.

1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least 10 seconds and then turn it “ON” (engine stopped) again.

2. Turn CONSULT-II “ON” and touch “A/T”.

3. Touch “SELF-DIAG RESULTS”.

4. Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK” twice.

5. Touch “ENGINE”.

6. Touch “SELF-DIAG RESULTS”.

NHEC0031S06

NHEC0031S0601

EC-80

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

7. Touch “ERASE”. (The DTC in the ECM will be erased.)

I If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased

individually from the ECM and TCM (Transmission control module).

The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELFDIAG RESULTS” mode with CONSULT-II.

How to Erase DTC ( With GST)

NOTE: If the DTC is not for A/T related items (see EC-8), skip step 2.

1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least 10 seconds and then turn it “ON” (engine stopped) again.

2. Perform “SELF-DIAGNOSTIC PROCEDURE (Without CONSULT-II)” in AT section titled “TROUBLE DIAGNOSIS”, “Self-diagnosis”. (The engine warm-up step can be skipped when performing the diagnosis only to erase the DTC.)

3. Select Mode 4 with GST (Generic Scan Tool).

The emission related diagnostic information in the ECM can be erased by selecting Mode 4 with GST.

I If the battery is disconnected, the emission-related diagnostic information will be lost after approx.

24 hours.

I The following data are cleared when the ECM memory is erased.

1) Diagnostic trouble codes

2) 1st trip diagnostic trouble codes

3) Freeze frame data

4) 1st trip freeze frame data

5) System readiness test (SRT) codes

6) Test values

EC-81

SEF823YC

NHEC0031S0602

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

7) Others

Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all of the data listed above, are cleared from the ECM memory during work procedures.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

SEF543X

NHEC0031S08

I If the security indicator lights up with the ignition switch in the “ON” position or “NATS MALFUNC-

TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with CONSULT-IIusing NATS program card. Refer to “IVIS (Infiniti VehicleImmobilizer System — NATS)” in EL section.

I Confirm no self-diagnostic results of IVIS (NATS) is displayed before touching “ERASE” in “SELF-

DIAG RESULTS” mode with CONSULT-II.

I When replacing ECM, initialization of IVIS (NATS) system and registration of all IVIS (NATS) igni-

tion key IDs must be carried out with CONSULT-II using NATS program card. Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of IVIS (NATS) initialization and IVIS (NATS) ignition key ID registration, refer to CONSULT-II operation manual, IVIS/NVIS.

Malfunction Indicator Lamp (MIL)

DESCRIPTION

SEF217U

The MIL is located on the instrument panel.

1. The MIL will light up when the ignition switch is turned ON without the engine running. This is a bulb check.

I If the MIL does not light up, refer to EL-167, “WARNING LAMPS” or see EC-643.

2. When the engine is started, the MIL should go off. If the MIL remains on, the on board diagnostic system has detected an engine system malfunction.

NHEC0032

EC-82

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

On Board Diagnostic System Function

=NHEC0032S01

The on board diagnostic system has the following two functions.

Diagnostic Test Mode

Mode I Ignition switch in

Diagnostic Test Mode I — Bulb Check

KEY and ENG. Status

“ON” position

Engine stopped

Engine running

Function Explanation of Function

BULB CHECK This function checks the MIL bulb for damage (blown,

open circuit, etc.). If the MIL does not come on, check MIL circuit.

MALFUNCTION WARNING

This is a usual driving condition. When a malfunction is detected twice in two consecutive driving cycles (two trip detection logic), the MIL will light up to inform the driver that a malfunction has been detected. The following malfunctions will light up or blink the MIL in the 1st trip.

I Coolant overtemperature enrichment protection I “Misfire (Possible three way catalyst damage)” I “Closed loop control” I Fail-safe mode

NHEC0032S03

In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to EL-167, “WARNING LAMPS” or see EC-643.

Diagnostic Test Mode I — Malfunction Warning

MIL Condition ON When the malfunction is detected or the ECM’s CPU is malfunctioning.

NHEC0032S04

OFF No malfunction.

OBD System Operation Chart

RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS

I When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are

stored in the ECM memory.

I When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are

stored in the ECM memory, and the MIL will come on. For details, refer to “Two Trip Detection Logic” on EC-68.

I The MIL will go off after the vehicle is driven 3 times with no malfunction. The drive is counted only when

the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while counting, the counter will reset.

I The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A)

without the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injection System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (driving pattern C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC RESULTS” mode of CONSULT-II will count the number of times the vehicle is driven.

I The 1st trip DTC is not displayed when the self-diagnosis results in “OK” for the 2nd trip.

SUMMARY CHART

Items Fuel Injection System Misfire Other MIL (goes off) 3 (pattern B) 3 (pattern B) 3 (pattern B) DTC, Freeze Frame Data (no

display)

80 (pattern C) 80 (pattern C) 40 (pattern A)

NHEC0033

NHEC0033S01

NHEC0033S02

IDX

EC-83

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

Items Fuel Injection System Misfire Other 1st Trip DTC (clear) 1 (pattern C), *1 1 (pattern C), *1 1 (pattern B) 1st Trip Freeze Frame Data

(clear)

For details about patterns “B” and “C” under “Fuel Injection System” and “Misfire”, see EC-86. For details about patterns “A” and “B” under “Other”, see EC-88. *1: Clear timing is at the moment OK is detected. *2: Clear timing is when the same malfunction is detected in the 2nd trip.

*1, *2 *1, *2 1 (pattern B)

EC-84

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR “MISFIRE” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”

=NHEC0033S03

*1: When the same malfunction is

detected in two consecutive trips, MIL will light up.

*2: MIL will go off after vehicle is

driven 3 times (pattern B) without any malfunctions.

*3: When the same malfunction is

detected in two consecutive trips, the DTC and the freeze frame data will be stored in ECM.

*4: The DTC and the freeze frame

data will not be displayed any longer after vehicle is driven 80 times (pattern C) without the same malfunction. (The DTC and the freeze frame data still remain in ECM.)

*5: When a malfunction is detected

for the first time, the 1st trip DTC and the 1st trip freeze frame data will be stored in ECM.

*6: The 1st trip DTC and the 1st trip

SEF392S

freeze frame data will be cleared at the moment OK is detected.

*7: When the same malfunction is

detected in the 2nd trip, the 1st trip freeze frame data will be cleared.

*8: 1st trip DTC will be cleared when

vehicle is driven once (pattern C) without the same malfunction after DTC is stored in ECM.

IDX

EC-85

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”

Driving pattern B means the vehicle operation as follows: All components and systems should be monitored at least once by the OBD system.

I The B counter will be cleared when the malfunction is detected once regardless of the driving pattern. I The B counter will be counted up when driving pattern B is satisfied without any malfunction. I The MIL will go off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)

NHEC0033S04

NHEC0033S0401

NHEC0033S0402

Driving pattern C means the vehicle operation as follows:

1) The following conditions should be satisfied at the same time: Engine speed: (Engine speed in the freeze frame data) ±375 rpm Calculated load value: (Calculated load value in the freeze frame data) x (1±0.1) [%] Engine coolant temperature (T) condition:

I When the freeze frame data shows lower than 70°C (158°F), “T” should be lower than 70°C (158°F). I When the freeze frame data shows higher than or equal to 70°C (158°F), “T” should be higher than or

equal to 70°C (158°F).

Example: If the stored freeze frame data is as follows: Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80°C (176°F) To be satisfied with driving pattern C, the vehicle should run under the following conditions: Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70°C (158°F)

I The C counter will be cleared when the malfunction is detected regardless of (1). I The C counter will be counted up when (1) is satisfied without the same malfunction. I The DTC will not be displayed after C counter reaches 80. I The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC

is stored in ECM.

EC-86

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”

NHEC0033S05

*1: When the same malfunction is

detected in two consecutive trips, MIL will light up.

*2: MIL will go off after vehicle is

driven 3 times (pattern B) without any malfunctions.

*3: When the same malfunction is

detected in two consecutive trips, the DTC and the freeze frame data will be stored in ECM.

*4: The DTC and the freeze frame

data will not be displayed any longer after vehicle is driven 40 times (pattern A) without the same malfunction. (The DTC and the freeze frame data still remain in ECM.)

*5: When a malfunction is detected

for the first time, the 1st trip DTC

SEF393S

and the 1st trip freeze frame data will be stored in ECM.

*6: 1st trip DTC will be cleared after

vehicle is driven once (pattern B) without the same malfunction.

*7: When the same malfunction is

detected in the 2nd trip, the 1st trip freeze frame data will be cleared.

IDX

EC-87

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”

NHEC0033S0601

NHEC0033S06

I The A counter will be cleared when the malfunction is detected regardless of (1) - (4). I The A counter will be counted up when (1) - (4) are satisfied without the same malfunction. I The DTC will not be displayed after the A counter reaches 40.

Driving pattern B means the vehicle operation as follows: All components and systems should be monitored at least once by the OBD system.

I The B counter will be cleared when the malfunction is detected once regardless of the driving pattern. I The B counter will be counted up when driving pattern B is satisfied without any malfunctions. I The MIL will go off when the B counter reaches 3 (*2 in “OBD SYSTEM OPERATION CHART”).

AEC574

NHEC0033S0602

EC-88

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II

SEF289X

PBR455D

CONSULT-II

CONSULT-II INSPECTION PROCEDURE

1. Turn ignition switch OFF.

2. Connect “CONSULT-II” to data link connector, which is located under LH dash panel near the fuse box cover.

3. Turn ignition switch ON.

4. Touch “START”.

5. Touch “ENGINE”.

=NHEC0034

NHEC0034S01

SEF995X

SEF824Y

6. Perform each diagnostic test mode according to each service procedure.

For further information, see the CONSULT-II Operation Manual.

IDX

EC-89

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

DIAGNOSTIC TEST MODE

NHEC0034S02

SELF-DIAGNOSTIC

Item

Crankshaft position sensor (POS)

Crankshaft position sensor (REF) X X X Mass air flow sensor X X X Engine coolant temperature sen-

sor Heated oxygen sensor 1 (front) X X X X X Heated oxygen sensor 2 (rear) X X X X X Vehicle speed sensor XXXX Throttle position sensor X X X Fuel tank temperature sensor X X X X EVAP control system pressure

sensor Absolute pressure sensor X X X

WORK

SUP-

PORT

RESULTS

FREEZE

DTC*1

XXXX

XXXXX

XXX

FRAME DATA*2

DATA

MONI-

TOR

DATA

MONI-

TOR

(SPEC)

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC

SRT

STATUS

WORK

SUP-

PORT

Intake air temperature sensor X X X Knock sensor X X

INPUT

Ignition switch (start signal) X X

Closed throttle position switch X X X Closed throttle position switch

(throttle position sensor signal)

ENGINE CONTROL COMPONENT PARTS

Air conditioner switch X X Park/neutral position (PNP)

switch Power steering oil pressure

switch Battery voltage X X Ambient air temperature switch X X Load signal X X Swirl control valve control

vacuum check switch Fuel level sensor X X X

XXX

EC-90

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

DIAGNOSTIC TEST MODE

CONSULT-II (Cont’d)

SELF-DIAGNOSTIC

Item

Injectors X X X

Power transistor (Ignition timing)

IACV-AAC valve X X X X EVAP canister purge volume

control solenoid valve Air conditioner relay X X Fuel pump relay X X X X Cooling fan X X X X Heated oxygen sensor 1 heater

(front)

OUTPUT

Heated oxygen sensor 2 heater (rear)

EVAP canister vent control valve X X X X

WORK

SUP-

PORT

RESULTS

FREEZE

DTC*1

(Ignition

signal)

X XXX X

XXXX

FRAME DATA*2

DATA

MONI-

TOR

XXX

DATA

MONI-

TOR

(SPEC)

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC

SRT

STATUS

WORK

SUP-

PORT

Vacuum cut valve bypass valve X X X X X

ENGINE CONTROL COMPONENT PARTS

Swirl control valve control solenoid valve

VIAS control solenoid valve X X X

X: Applicable *1: This item includes 1st trip DTCs. *2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data

mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-69.

Electronic controlled engine mount

Calculated load value X X X

X XXX

XXX

IDX

EC-91

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

FUNCTION

Diagnostic test mode Function

Work support

Self-diagnostic results

Data monitor Input/Output data in the ECM can be read.

Data monitor (SPEC)

Active test

DTC confirmation The status of system monitoring tests and the self-diagnosis status/result can be confirmed. ECM part number ECM part number can be read.

*1 The following emission-related diagnostic information is cleared when the ECM memory is erased.

1) Diagnostic trouble codes

2) 1st trip diagnostic trouble codes

3) Freeze frame data

4) 1st trip freeze frame data

5) System readiness test (SRT) codes

6) Test values

7) Others

This mode enables a technician to adjust some devices faster and more accurately by following the indications on the CONSULT-II unit.

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data can be read and erased quickly.*1

Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the other data monitor items can be read.

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also shifts some parameters in a specified range.

=NHEC0034S03

WORK SUPPORT MODE

WORK ITEM CONDITION USAGE

TP SW/TP SEN IDLE POSI ADJ I FOLLOW THE BASIC INSPECTION IN THE SERVICE

MANUAL.

FUEL PRESSURE RELEASE I FUEL PUMP WILL STOP BY TOUCHING “START”

DURING IDLING. CRANK A FEW TIMES AFTER ENGINE STALLS.

IDLE AIR VOL LEARN I THE IDLE AIR VOLUME THAT KEEPS THE ENGINE

WITHIN THE SPECIFIED RANGE IS MEMORIZED IN ECM.

SELF-LEARNING CONT I THE COEFFICIENT OF SELF-LEARNING CONTROL

MIXTURE RATIO RETURNS TO THE ORIGINAL COEFFICIENT.

NHEC0034S04

When adjusting the idle throttle position.

When releasing fuel pressure from fuel line

When learning the idle air volume

When releasing fuel pressure from fuel line

EC-92

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

WORK ITEM CONDITION USAGE

EVAP SYSTEM CLOSE OPEN THE VACUUM CUT VALVE BYPASS VALVEAND

CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE FOLLOWING CONDITIONS.

I IGN SW “ON” I ENGINE NOT RUNNING I AMBIENT TEMPERATURE IS ABOVE 0°C (32°F). I NO VACUUM AND NO HIGH PRESSURE IN EVAP

SYSTEM

I TANK FUEL TEMP. IS MORE THAN 0°C (32°F). I WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-

TEM CLOSE”

I WHEN TRYING TO EXECUTE “EVAP SYSTEM

CLOSE” UNDER THE CONDITION EXCEPT ABOVE, CONSULT-II WILL DISCONTINUE IT AND DISPLAY APPROPRIATE INSTRUCTION.

NOTE: WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY “BATTERY VOLTAGE IS LOW. CHARGE BATTERY”, EVEN IN USING CHARGED BATTERY.

TARGET IDLE RPM ADJ* I IDLE CONDITION When setting target idle speed TARGET IGNITION TIMING ADJ* I IDLE CONDITION When adjusting target ignition tim-

*: This function is not necessary in the usual service procedure.

When detecting EVAP vapor leak point of EVAP system

ing After adjustment, confirm target ignition timing with a timing light.

SELF-DIAGNOSTIC MODE DTC and 1st Trip DTC

Regarding items of “DTC and 1st trip DTC”, refer to “TROUBLE DIAGNOSIS — INDEX”. (See EC-8.)

Freeze Frame Data and 1st Trip Freeze Frame Data

Freeze frame data

item*1

Description

NHEC0034S05

NHEC0034S0501

NHEC0034S0502

DIAG TROUBLE CODE [PXXXX]

FUEL SYS-B1*2

FUEL SYS-B2*2

CAL/LD VALUE [%] I The calculated load value at the moment a malfunction is detected is displayed. COOLANT TEMP [°C]

or [°F] S-FUEL TRIM-B1 [%] S-FUEL TRIM-B2 [%] L-FUEL TRIM-B1 [%] L-FUEL TRIM-B2 [%] ENGINE SPEED

[rpm]

I The engine control component part/control system has a trouble code, it is displayed as “PXXXX”.

(Refer to “TROUBLE DIAGNOSIS — INDEX”, EC-8.)

I “Fuel injection system status” at the moment a malfunction is detected is displayed. I One mode in the following is displayed.

“MODE 2”: Open loop due to detected system malfunction “MODE 3”: Open loop due to driving conditions (power enrichment, deceleration enrichment) “MODE 4”: Closed loop - using oxygen sensor(s) as feedback for fuel control “MODE 5”: Open loop - has not yet satisfied condition to go to closed loop

I The engine coolant temperature at the moment a malfunction is detected is displayed.

I “Short-term fuel trim” at the moment a malfunction is detected is displayed. I The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel

schedule.

I “Long-term fuel trim” at the moment a malfunction is detected is displayed. I The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule

than short-term fuel trim.

I The engine speed at the moment a malfunction is detected is displayed.

EC-93

IDX

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Freeze frame data

item*1

VHCL SPEED [km/h] or [mph]

ABSOL TH·P/S [%] I The throttle valve opening angle at the moment a malfunction is detected is displayed. B/FUEL SCHDL

[msec] INT/A TEMP SE [°C]

or [°F]

*1: The items are the same as those of 1st trip freeze frame data. *2: Regarding A33 model, “-B1” indicates right bank and “-B2” indicates left bank.

I The vehicle speed at the moment a malfunction is detected is displayed.

I The base fuel schedule at the moment a malfunction is detected is displayed.

I The intake air temperature at the moment a malfunction is detected is displayed.

Description

EC-94

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

ECM

Monitored item [Unit]

ENG SPEED [rpm] qq

CKPS·RPM (POS) [rpm]

POS COUNT q

MAS A/F SE-B1 [V] qq

COOLAN TEMP/S [°C] or [°F]

HO2S1 (B1) [V] qq HO2S1 (B2) [V] qq HO2S2 (B1) [V] qq HO2S2 (B2) [V] qq

HO2S1 MNTR (B1) [RICH/LEAN]

input

signals

HO2S1 MNTR (B2) [RICH/LEAN]

HO2S2 MNTR (B1) [RICH/LEAN]

HO2SW MNTR (B2) [RICH/LEAN]

Main

signals

DATA MONITOR MODE

Description Remarks

I Indicates the engine speed computed

from the REF signal (120° signal) of the crankshaft position sensor (REF).

I Indicates the engine speed computed

from the POS signal (1° signal) of the crankshaft position sensor (POS).

I Indicates the number of signal plate

(Flywheel/Drive Plate) cogs (tooth) during one revolution of the engine.

I The signal voltage of the mass air flow

sensor is displayed.

I The engine coolant temperature (deter-

mined by the signal voltage of the engine coolant temperature sensor) is displayed.

I The signal voltage of the heated oxy-

gen sensor 1 (front) is displayed.

I The signal voltage of the heated oxy-

gen sensor 2 (rear) is displayed.

I Display of heated oxygen sensor 1

(front) signal during air-fuel ratio feedback control: RICH ... means the mixture became “rich”, and control is being affected toward a leaner mixture. LEAN ... means the mixture became “lean”, and control is being affected toward a rich mixture.

I Display of heated oxygen sensor 2

(rear) signal: RICH ... means the amount of oxygen after three way catalyst is relatively small. LEAN ... means the amount of oxygen after three way catalyst is relatively large.

=NHEC0034S06

I Accuracy becomes poor if engine

speed drops below the idle rpm.

I If the signal is interrupted while the

engine is running, an abnormal value may be indicated.

I When the engine is stopped, a certain

value is indicated.

I When the engine coolant temperature

sensor is open or short-circuited, ECM enters fail-safe mode. The engine coolant temperature determined by the ECM is displayed.

I After turning ON the ignition switch,

“RICH” is displayed until air-fuel mixture ratio feedback control begins.

I When the air-fuel ratio feedback is

clamped, the value just before the clamping is displayed continuously.

I When the engine is stopped, a certain

value is indicated.

VHCL SPEED SE [km/h] or [mph]

BATTERY VOLT [V] qq

THRTL POS SEN [V] qq

FUEL T/TMP SE [°C] or [°F]

I The vehicle speed computed from the

I The power supply voltage of ECM is

I The throttle position sensor signal volt-

I The fuel temperature judged from the

vehicle speed sensor signal is dis-

played.

IDX

displayed.

age is displayed.

tank fuel temperature sensor signal voltage is displayed.

EC-95

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Monitored item [Unit]

INT/A TEMP SE [°C] or [°F]

START SIGNAL [ON/OFF]

CLSD THL/P SW [ON/OFF]

CLSD THL POS [ON/OFF]

AIR COND SIG [ON/OFF]

P/N POSI SW [ON/OFF]

PW/ST SIGNAL [ON/OFF]

ECM

input

signals

Main

signals

Description Remarks

I The intake air temperature determined

by the signal voltage of the intake air temperature sensor is indicated.

I Indicates [ON/OFF] condition from the

starter signal.

I Indicates mechanical contact [ON/OFF]

condition of the closed throttle position switch.

I Indicates idle position [ON/OFF] com-

puted by ECM according to the throttle position sensor signal.

I Indicates [ON/OFF] condition of the air

conditioner switch as determined by the air conditioner signal.

I Indicates [ON/OFF] condition from the

park/neutral position (PNP) switch signal.

I [ON/OFF] condition of the power steer-

ing oil pressure switch determined by the power steering oil pressure signal is indicated.

I After starting the engine, [OFF] is dis-

played regardless of the starter signal.

AMB TEMP SW [ON/OFF]

IGNITION SW [ON/OFF]

INJ PULSE-B1 [msec]

INJ PULSE-B2

[msec]

B/FUEL SCHDL [msec]

IGN TIMING [BTDC] q

IACV-AAC/V [step] q

PURG VOL C/V [%] q

I Indicates [ON/OFF] condition from the

I Indicates [ON/OFF] condition from igni-

I Indicates the actual fuel injection pulse

I “Base fuel schedule” indicates the fuel

I Indicates the ignition timing computed

I Indicates the IACV-AAC valve control

I Indicates the EVAP canister purge vol-

I The opening becomes larger as the

ambient air temperature switch signal.

tion switch.

width compensated by ECM according to the input signals.

injection pulse width programmed into ECM, prior to any learned on board correction.

by ECM according to the input signals.

value computed by ECM according to the input signals.

ume control solenoid valve control value computed by the ECM according to the input signals.

value increases.

I When the engine is stopped, a certain

computed value is indicated.

I When the engine is stopped, a certain

value is indicated.

A/F ALPHA-B1 [%] q

A/F ALPHA-B2 [%] q

EVAP SYS PRES [V] q

I The mean value of the air-fuel ratio

feedback correction factor per cycle is indicated.

I The signal voltage of EVAP control sys-

tem pressure sensor is displayed.

EC-96

I When the engine is stopped, a certain

value is indicated.

I This data also includes the data for the

air-fuel ratio learning control.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

Monitored item [Unit]

AIR COND RLY [ON/OFF]

FUEL PUMP RLY [ON/OFF]

COOLING FAN [ON/OFF]

VENT CONT/V [ON/OFF]

HO2S1 HTR (B1) [ON/OFF]

HO2S1 HTR (B2) [ON/OFF]

HO2S2 HTR (B1) [ON/OFF]

HO2S2 HTR (B2) [ON/OFF]

ECM

input

signals

Main

signals

Description Remarks

I The air conditioner relay control condi-

tion (determined by ECM according to the input signal) is indicated.

I Indicates the fuel pump relay control

condition determined by ECM according to the input signals.

I Indicates the control condition of the

cooling fan (determined by ECM according to the input signal). HIGH ... High speed operation LOW ... Low speed operation OFF ... Stop

I The control condition of the EVAP can-

ister vent control valve (determined by ECM according to the input signal) is indicated.

I ON ... Closed

OFF ... Open

I Indicates [ON/OFF] condition of heated

oxygen sensor 1 heater (front) determined by ECM according to the input signals.

I Indicates [ON/OFF] condition of heated

oxygen sensor 2 heater (rear) determined by ECM according to the input signals.

VC/V BYPASS/V

[ON/OFF]

CAL/LD VALUE [%]

ABSOL TH·P/S [%]

MASS AIRFLOW [g·m/s]

ABSOL PRES/SE [V] q

SWRL CONT S/V [ON/OFF]

I The control condition of the vacuum cut

valve bypass valve (determined by ECM according to the input signal) is indicated.

I ON ... Open

OFF ... Closed

I “Calculated load value” indicates the

value of the current airflow divided by peak airflow.

I “Absolute throttle position sensor” indi-

cates the throttle valve opening angle computed by ECM according to the signal voltage of the throttle position sensor.

I Indicates the mass airflow computed by

ECM according to the signal voltage of the mass airflow sensor.

I The signal voltage of the absolute pres-

sure sensor is displayed.

I The control condition of the swirl con-

trol valve control solenoid valve (determined by ECM according to the input signals) is indicated.

I ON ... Swirl control valve is closed.

OFF ... Swirl control valve is opened.

IDX

EC-97

CONSULT-II (Cont’d)

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

ECM

Monitored item [Unit]

LOAD SIGNAL [ON/OFF]

TRVL AFTER MIL [km] or [Mile]

VIAS S/V [ON/OFF]

SWL CON VC SW q

input

signals

Main

signals

Description Remarks

I Indicates [ON/OFF] condition from the

electrical load signal and/or lighting switch. ON ... rear defogger is operating and/or lighting switch is on. OFF ... rear defogger is not operating and lighting switch is not on.

I Distance traveled while MIL is activated

I The control condition of the VIAS con-

trol solenoid valve (determined by ECM according to the input signal) is indicated.

I OFF ... VIAS control solenoid valve is

not operating. ON ... VIAS control solenoid valve is operating.

I Indicates [ON/OFF] condition from the

swirl control valve control vacuum check switch. ON ... Swirl control valve is not operational. OFF ... Swirl control valve is operational.

I The control condition of the electronic

controlled engine mount (computed by ENGINE MOUNT [IDLE/TRVL]

FUEL LEVEL SE [V] q

IDL A/V LEAN

Voltage [V]

Frequency [msec] or [Hz] or [%]

NOTE:

I Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically. I Regarding A33 model, “-B1” indicates right bank and “-B2” indicates left bank.

ECM according to the input signals) is

indicated.

I IDLE ... Idle condition I TRVL ... Driving condition

I The signal voltage of the fuel level sen-

sor is displayed.

I Display the condition of idle air volume

learning

YET ... Idle air volume learning has not

been performed yet.

CMPLT ... Idle air volume learning has

already been performed successfully.

INCMP ... Idle air volume learning has

not been performed successfully.

I Voltage measured by the voltage

probe.

I Pulse width, frequency or duty cycle

measured by the pulse probe.

I Only “#” is displayed if item is unable to

be measured.

I Figures with “#”s are temporary ones.

They are the same figures as an actual piece of data which was just previously measured.

EC-98

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

DATA MONITOR (SPEC) MODE

ECM

Monitored item [Unit]

ENG SPEED [rpm] qq

MAS A/F SE-B1 [V] qq

B/FUEL SCHDL [msec]

A/F ALPHA-B1 [%] A/F ALPHA-B2 [%]

input

signals

Main

signals

Description Remarks

I Indicates the engine speed computed

from the REF signal (180° signal) of the

camshaft position sensor (PHASE).

I The signal voltage of the mass air flow

sensor specification is displayed.

I “Base fuel schedule” indicates the fuel

injection pulse width programmed into

ECM, prior to any learned on board

correction.

I The mean value of the air-fuel ratio

feedback correction factor per cycle is

indicated.

I When engine is running specification

range is indicated.

I When engine is running specification

range is indicated.

I When engine is running specification

range is indicated.

I This data also includes the data for the

air-fuel ratio learning control.

ACTIVE TEST MODE

TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)

FUEL INJECTION

IACV-AAC/V OPENING

I Engine: Return to the original

trouble condition

I Change the amount of fuel injec-

tion using CONSULT-II.

I Engine: After warming up, idle

the engine.

I Change the IACV-AAC valve

opening percent using CONSULT-II.

If trouble symptom disappears, see CHECK ITEM.

Engine speed changes according to the opening percent.

I Harness and connector I Fuel injectors I Front heated oxygen sensor

I Harness and connector I IACV-AAC valve

NHEC0034S11

NHEC0034S07

I Engine: Return to the original ENG COOLANT TEMP

IGNITION TIMING

POWER BALANCE

COOLING FAN

FUEL PUMP RELAY

trouble condition

I Change the engine coolant tem-

perature using CONSULT-II.

I Engine: Return to the original

trouble condition

I Timing light: Set

I Retard the ignition timing using

CONSULT-II.

I Engine: After warming up, idle

the engine.

I A/C switch “OFF”

I Shift lever “N”

I Cut off each injector signal one

at a time using CONSULT-II.

I Ignition switch: ON

I Turn the cooling fan “ON” and

“OFF” using CONSULT-II.

I Ignition switch: ON

(Engine stopped)

I Turn the fuel pump relay “ON”

and “OFF” using CONSULT-II and listen to operating sound.

If trouble symptom disappears, see CHECK ITEM.

Engine runs rough or dies.

Cooling fan moves and stops.

Fuel pump relay makes the operating sound.

I Harness and connector I Engine coolant temperature sen-

sor

I Fuel injectors

I Adjust initial ignition timing

I Harness and connector I Compression I Injectors I Power transistor I Spark plugs I Ignition coils

I Harness and connector I Cooling fan motor I Cooling fan relay

I Harness and connector I Fuel pump relay

IDX

EC-99

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)

I Engine: After warming up, run

engine at 1,500 rpm. PURG VOL CONT/V

VENT CONTROL/V

VC/V BYPASS/V

SWIRL CONT SOL VALVE

I Change the EVAP canister purge

volume control solenoid valve

opening percent using CON-

SULT-II.

I Ignition switch: ON

(Engine stopped)

I Turn solenoid valve “ON” and

“OFF” with the CONSULT-II and

listen to operating sound.

I Ignition switch: ON

(Engine stopped)

I Turn solenoid valve “ON” and

“OFF” with the CONSULT-II and

listen to operating sound.

I Ignition switch: ON I Turn solenoid valve “ON” and

“OFF” with CONSULT-II and lis-

ten for operating sound.

Engine speed changes according to the opening percent.

Solenoid valve makes an operating sound.

I Harness and connector I Solenoid valve

I Ignition switch: ON

VIAS SOL VALVE

ENGINE MOUNTING

I Turn solenoid valve “ON” and

“OFF” with CONSULT-II and lis-

ten for operating sound.

I Engine: After warming up, run

engine at idle speed.

I Gear position: “D”’ range

(Vehicle stopped)

I Turn electronic controlled engine

mount “IDLE” and “RAVEL” with

the CONSULT-II.

Solenoid valve makes an operating sound.

Body vibration changes according to the electronic controlled engine mount condition.

DTC & SRT CONFIRMATION MODE SRT STATUS Mode

I Harness and connector I Solenoid valve

I Harness and connector I Electronic controlled engine

mount

NHEC0034S08

NHEC0034S0801

For details, refer to “SYSTEM READINESS TEST (SRT) CODE”, EC-70.

SRT Work Support Mode

NHEC0034S0803

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

EC-100

Infiniti I30 A33 (2001) Service Manual – ENGINE CONTROL SYSTEM

Specifications and Main Features

Frequently Asked Questions

User Manual

Alphabetical & P No. Index for DTC

PRECAUTIONS

Precautions for On Board Diagnostic (OBD) System of Engine and A/T

Engine Fuel & Emission Control System

Precautions

Wiring Diagrams and Trouble Diagnosis

Special Service Tools

PREPARATION

Commercial Service Tools

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location

Circuit Diagram

System Diagram

Vacuum Hose Drawing

System Chart

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Multiport Fuel Injection (MFI) System

Electronic Ignition (EI) System

Air Conditioning Cut Control

Fuel Cut Control (at no load & high engine speed)

Evaporative Emission System

On Board Refueling Vapor Recovery (ORVR)

Positive Crankcase Ventilation

BASIC SERVICE PROCEDURE

Fuel Pressure Release

Fuel Pressure Check

Fuel Pressure Regulator Check

Injector

How to Check Idle Speed and Ignition Timing

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

Idle Air Volume Learning

Introduction

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Two Trip Detection Logic

Emission-related Diagnostic Information

Malfunction Indicator Lamp (MIL)

OBD System Operation Chart

CONSULT-II