Infiniti Q45 FY33 (2000) Service Manual – ENGINE CONTROL SYSTEM

Download

ENGINE CONTROL SYSTEM

EXIT

DIAGNOSTIC TROUBLE CODE INDEX.........................4

Alphabetical & P No. Index for DTC ...........................4

PRECAUTIONS AND PREPARATION............................8

Special Service Tool....................................................8

Commercial Service Tools...........................................8

Supplemental Restraint System (SRS) ″AIR

BAG″ and ″SEAT BELT PRE-TENSIONER″.............10

Precautions for On Board Diagnostic (OBD)

System of Engine and A/T.........................................10

Engine Fuel & Emission Control System..................11

Precautions................................................................12

ENGINE AND EMISSION CONTROL OVERALL

SYSTEM.........................................................................14

Circuit Diagram..........................................................14

System Diagram........................................................16

Engine Control Component Parts Location...............17

Vacuum Hose Drawing..............................................19

System Chart.............................................................20

ENGINE AND EMISSION BASIC CONTROL

SYSTEM DESCRIPTION...............................................21

Multiport Fuel Injection (MFI) System .......................21

Electronic Ignition (EI) System..................................23

Air Conditioning Cut Control......................................24

Fuel Cut Control (at no load & high engine

speed)........................................................................25

EVAPORATIVE EMISSION SYSTEM ...........................26

Description.................................................................26

Inspection...................................................................26

Evaporative Emission Line Drawing..........................29

On Board Refueling Vapor Recovery (ORVR)..........31

POSITIVE CRANKCASE VENTILATION......................36

Description.................................................................36

Inspection...................................................................36

BASIC SERVICE PROCEDURE...................................37

Fuel Pressure Release..............................................37

Fuel Pressure Check.................................................37

Injector Removal and Installation..............................38

Throttle Opener..........................................................39

Fast Idle Cam (FIC) Inspection and Adjustment.......40

Direct Ignition System - How to Check Idle

Speed and Ignition Timing.........................................40

SECTION

CONTENTS

Idle Speed/Ignition Timing/Idle Mixture Ratio

Adjustment.................................................................42

ON BOARD DIAGNOSTIC SYSTEM

DESCRIPTION...............................................................49

Introduction................................................................49

Two Trip Detection Logic...........................................49

Emission-related Diagnostic Information...................50

Malfunction Indicator Lamp (MIL)..............................65

OBD System Operation Chart...................................69

CONSULT-II...............................................................74

Generic Scan Tool (GST) ..........................................85

TROUBLE DIAGNOSIS - Introduction........................87

Introduction................................................................87

Diagnostic Worksheet................................................87

TROUBLE DIAGNOSIS - Work Flow...........................89

Work Flow..................................................................89

Description for Work Flow.........................................90

TROUBLE DIAGNOSIS - Basic Inspection ................91

Basic Inspection.........................................................91

TROUBLE DIAGNOSIS - General Description...........97

Diagnostic Trouble Code (DTC) Inspection

Priority Chart..............................................................97

Fail-Safe Chart...........................................................98

Symptom Matrix Chart...............................................99

CONSULT-II Reference Value in Data Monitor

Mode........................................................................102

Major Sensor Reference Graph in Data Monitor

Mode........................................................................105

ECM Terminals and Reference Value.....................107

TROUBLE DIAGNOSIS FOR INTERMITTENT

INCIDENT.....................................................................117

Description...............................................................117

Common I/I Report Situations.................................117

Diagnostic Procedure ..............................................117

TROUBLE DIAGNOSIS FOR POWER SUPPLY........118

Main Power Supply and Ground Circuit..................118

TROUBLE DIAGNOSIS FOR DTC P0100..................124

Mass Air Flow Sensor (MAFS)................................124

TROUBLE DIAGNOSIS FOR DTC P0105..................132

Absolute Pressure Sensor.......................................132

TROUBLE DIAGNOSIS FOR DTC P0110..................140

Intake Air Temperature Sensor................................140

IDX

CONTENTS (Cont’d)

EXIT

TROUBLE DIAGNOSIS FOR DTC P0115..................145

Engine Coolant Temperature Sensor (ECTS).........145

TROUBLE DIAGNOSIS FOR DTC P0120..................150

Throttle Position Sensor..........................................150

TROUBLE DIAGNOSIS FOR DTC P0125..................161

Engine Coolant Temperature (ECT) Sensor ...........161

TROUBLE DIAGNOSIS FOR DTC P0130 (-B1),

P0150 (-B2)..................................................................166

Front Heated Oxygen Sensors (Front HO2S) (Circuit) (P0130: Left bank), (P0150: Right bank)...166

TROUBLE DIAGNOSIS FOR DTC P0131 (-B1),

P0151 (-B2)..................................................................174

Front Heated Oxygen Sensor (Lean shift monitoring) (Front HO2S) (P0131: Left bank),

(P0151: Right bank).................................................174

TROUBLE DIAGNOSIS FOR DTC P0132 (-B1),

P0152 (-B2)..................................................................180

Front Heated Oxygen Sensor (Rich shift monitoring) (Front HO2S) (P0132: Left bank),

(P0152: Right bank).................................................180

TROUBLE DIAGNOSIS FOR DTC P0133 (-B1),

P0153 (-B2)..................................................................187

Front Heated Oxygen Sensor (Response monitoring) (Front HO2S) (P0133: Left bank),

(P0153: Right bank).................................................187

TROUBLE DIAGNOSIS FOR DTC P0134 (-B1),

P0154 (-B2)..................................................................196

Front Heated Oxygen Sensor (High voltage) (Front HO2S) (P0134: Left bank), (P0154: Right

bank)........................................................................196

TROUBLE DIAGNOSIS FOR DTC P0135 (-B1),

P0155 (-B2)..................................................................204

Front Heated Oxygen Sensor Heater (P0135:

Left bank), (P0155: Right bank)..............................204

TROUBLE DIAGNOSIS FOR DTC P0137 (-B1),

P0157 (-B2)..................................................................210

Rear Heated Oxygen Sensor (Min. Voltage Monitoring) (Rear HO2S) (P0137: Left bank),

(P0157: Right bank).................................................210

TROUBLE DIAGNOSIS FOR DTC P0138 (-B1),

P0158 (-B2)..................................................................218

Rear Heated Oxygen Sensor (Max. Voltage Monitoring) (Rear HO2S) (P0138: Left bank),

(P0158: Right bank).................................................218

TROUBLE DIAGNOSIS FOR DTC P0139 (-B1),

P0159 (-B2)..................................................................226

Rear Heated Oxygen Sensor (Response Monitoring) (Rear HO2S) (P0139: Left bank),

(P0159: Right bank).................................................226

TROUBLE DIAGNOSIS FOR DTC P0140 (-B1),

P0160 (-B2)..................................................................233

Rear Heated Oxygen Sensor (High voltage)

(Rear HO2S) (P0140: Left bank), (P0160: Right

bank)........................................................................233

TROUBLE DIAGNOSIS FOR DTC P0141 (-B1),

P0161 (-B2)..................................................................239

Rear Heated Oxygen Sensor Heaters (P0141:

Left bank), (P0161: Right bank)..............................239

TROUBLE DIAGNOSIS FOR DTC P0171 (-B1),

P0174 (-B2)..................................................................245

Fuel Injection System Function (Lean side)

(P0171: Left bank), (P0174: Right bank) ................245

TROUBLE DIAGNOSIS FOR DTC P0172 (-B1),

P0175 (-B2)..................................................................251

Fuel Injection System Function (Rich side)

(P0172: Left bank), (P0175: Right bank) ................251

TROUBLE DIAGNOSIS FOR DTC P0180..................257

Fuel Tank Temperature Sensor ...............................257

TROUBLE DIAGNOSIS FOR DTC P0300 - P0308....262

No.1-8Cylinder Misfire, Multiple Cylinder

Misfire ......................................................................262

TROUBLE DIAGNOSIS FOR DTC P0325 (-B1),

P0330 (-B2)..................................................................267

Knock Sensor (KS) (P0325: Left bank), (P0330:

Right bank) ..............................................................267

TROUBLE DIAGNOSIS FOR DTC P0335..................270

Crankshaft Position Sensor (CKPS) (OBD)............270

TROUBLE DIAGNOSIS FOR DTC P0340..................275

Camshaft Position Sensor (CMPS).........................275

TROUBLE DIAGNOSIS FOR DTC P0400..................281

EGR Function (Close) .............................................281

TROUBLE DIAGNOSIS FOR DTC P0402..................290

EGRC-BPT Valve Function .....................................290

TROUBLE DIAGNOSIS FOR DTC P0420 (-B1),

P0430 (-B2)..................................................................295

Three Way Catalyst Function (P0420: Left bank),

(P0430: Right bank).................................................295

TROUBLE DIAGNOSIS FOR DTC P0440..................298

Evaporative Emission (EVAP) Control System

(Small Leak) (Negative Pressure)...........................298

TROUBLE DIAGNOSIS FOR DTC P0443..................309

Evaporative Emission (EVAP) Canister Purge

Volume Control Valve (Circuit) ................................309

TROUBLE DIAGNOSIS FOR DTC P0446..................315

Evaporative Emission (EVAP) Canister Vent

Control Valve (Circuit)..............................................315

TROUBLE DIAGNOSIS FOR DTC P0450..................320

Evaporative Emission (EVAP) Control System

Pressure Sensor......................................................320

TROUBLE DIAGNOSIS FOR DTC P0455..................326

Evaporative Emission (EVAP) Control System

(Gross Leak)............................................................326

TROUBLE DIAGNOSIS FOR DTC P0500..................335

Vehicle Speed Sensor (VSS) ..................................335

CONTENTS (Cont’d)

EXIT

TROUBLE DIAGNOSIS FOR DTC P0505..................340

Idle Air Control Valve (IACV) - Auxiliary Air

Control (AAC) Valve ................................................340

TROUBLE DIAGNOSIS FOR DTC P0510..................346

Closed Throttle Position Switch...............................346

TROUBLE DIAGNOSIS FOR DTC P0600, P1605.....352

A/T Communication Line (P0600) and A/T

Diagnostic Communication Line (P1605)................352

TROUBLE DIAGNOSIS FOR DTC P0605..................355

Engine Control Module (ECM) ................................355

TROUBLE DIAGNOSIS FOR DTC P1105..................358

Manifold Absolute Pressure (MAP)/Barometric

Pressure (BARO) Switch Solenoid Valve................358

TROUBLE DIAGNOSIS FOR DTC P1110 (-B1),

P1135 (-B2)..................................................................367

Intake Valve Timing Control (P1110: Left bank),

(P1135: Right bank).................................................367

TROUBLE DIAGNOSIS FOR DTC P1120..................375

Secondary Throttle Position Sensor (STPS)...........375

TROUBLE DIAGNOSIS FOR DTC P1125..................381

Tandem Throttle Position Sensor ............................381

TROUBLE DIAGNOSIS FOR DTC P1140 (-B1),

P1145 (-B2)..................................................................382

Intake Valve Timing Control Position Sensor

(P1140: Left bank), (P1145: Right bank).................382

TROUBLE DIAGNOSIS FOR DTC P1148 (-B1),

P1168 (-B2)..................................................................388

Closed Loop Control (P1148: Left bank), (P1168:

Right bank) ..............................................................388

TROUBLE DIAGNOSIS FOR DTC P1210..................390

Traction Control System (TCS) Signal Circuit.........390

TROUBLE DIAGNOSIS FOR DTC P1220..................393

Fuel Pump Control Module (FPCM)........................393

TROUBLE DIAGNOSIS FOR DTC P1320..................399

Ignition Signal..........................................................399

TROUBLE DIAGNOSIS FOR DTC P1336..................407

Crankshaft Position Sensor (CKPS) (OBD)

(COG) ......................................................................407

TROUBLE DIAGNOSIS FOR DTC P1400..................412

EGRC-solenoid Valve ............................................412

TROUBLE DIAGNOSIS FOR DTC P1401..................417

EGR Temperature Sensor .......................................417

TROUBLE DIAGNOSIS FOR DTC P1402..................423

EGR Function (Open)..............................................423

TROUBLE DIAGNOSIS FOR DTC P1440..................432

Evaporative Emission (EVAP) Control System

(Small Leak) (Positive Pressure).............................432

TROUBLE DIAGNOSIS FOR DTC P1444..................444

Evaporative Emission (EVAP) Canister Purge

Volume Control Valve..............................................444

TROUBLE DIAGNOSIS FOR DTC P1446..................452

Evaporative Emission (EVAP) Canister Vent

Control Valve (Close)...............................................452

TROUBLE DIAGNOSIS FOR DTC P1447..................457

Evaporative Emission (EVAP) Control System

Purge Flow Monitoring.............................................457

TROUBLE DIAGNOSIS FOR DTC P1448..................464

Evaporative Emission (EVAP) Canister Vent

Control Valve (Open)...............................................464

TROUBLE DIAGNOSIS FOR DTC P1490..................470

Vacuum Cut Valve Bypass Valve (Circuit)...............470

TROUBLE DIAGNOSIS FOR DTC P1491..................475

Vacuum Cut Valve Bypass Valve............................475

TROUBLE DIAGNOSIS FOR DTC P1492..................481

Evaporative Emission (EVAP) Canister Purge

Control Valve/Solenoid Valve (Circuit).....................481

TROUBLE DIAGNOSIS FOR DTC P1493..................487

Evaporative Emission (EVAP) Canister Purge

Control Valve/Solenoid Valve..................................487

TROUBLE DIAGNOSIS FOR DTC P1706..................494

Park/Neutral Position (PNP) Switch........................494

TROUBLE DIAGNOSIS FOR ABS/TCS C/U

SIGNAL........................................................................499

ABS/TCS Control Unit.............................................499

TROUBLE DIAGNOSIS FOR ECM - ABS/TCS

COMM NG....................................................................500

ABS/TCS Communication Line ...............................500

TROUBLE DIAGNOSIS FOR OVERHEAT.................503

Overheat..................................................................503

TROUBLE DIAGNOSIS FOR NON-DETECTABLE

ITEMS...........................................................................515

Injector.....................................................................515

Start Signal..............................................................521

Fuel Pump Control...................................................523

Power Steering Oil Pressure Switch.......................527

Electrical Load Signal..............................................532

MIL & Data Link Connectors ...................................535

SERVICE DATA AND SPECIFICATIONS (SDS) ........536

General Specifications.............................................536

Inspection and Adjustment ......................................536

When you read wiring diagrams:

I Read GI section, “HOW TO READ WIRING DIAGRAMS”. I See EL section, “POWER SUPPLY ROUTING” for power distribution circuit.

When you perform trouble diagnoses, read GI section, “HOW TO FOLLOW FLOW CHART IN TROUBLE DIAGNOSES” and “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”.

IDX

DIAGNOSTICTROUBLECODEINDEX

ALPHABETICALINDEXFORDTC

Alphabetical&PNo.IndexforDTC

EXIT

Items

(CONSULT-IIscreen

terms)

*COOLANTSEN/CIRC P0125 0908 EC-161 A/T1STGRFNCTN P0731 1103 AT-95 A/T2NDGRFNCTN P0732 1104 AT-100 A/T3RDGRFNCTN P0733 1105 AT-104 A/T4THGRFNCTN P0734 1106 AT-108 A/TCOMMLINE P0600 0504 EC-352 A/TDIAGCOMMLINE P1605 0804 EC-352 A/TTCCS/VFNCTN P0744 1107 AT-118 ABS-TCSC/USIGNAL — 0107 EC-500 ABSLPRESSEN/CIRC P0105 0803 EC-132 AIRTEMPSEN/CIRC P0110 0401 EC-140 ATFTEMPSEN/CIRC P0710 1208 AT-85 CAMPOSSEN/CIR P0340 0101 EC-275 CLOSEDLOOP-B1 P1148 0307 EC-388 CLOSEDLOOP-B2 P1168 0308 EC-388 CLOSEDTPSW/CIRC P0510 0203 EC-346 COOLANTTSEN/CIRC P0115 0103 EC-145 CPS/CIRC(OBD)COG P1336 0905 EC-407 CPS/CIRCUIT(OBD) P0335 0802 EC-270 CYL1MISFIRE P0301 0608 EC-262 CYL2MISFIRE P0302 0607 EC-262 CYL3MISFIRE P0303 0606 EC-262

CYL4MISFIRE P0304 0605 EC-262 CYL5MISFIRE P0305 0604 EC-262 CYL6MISFIRE P0306 0603 EC-262 CYL7MISFIRE P0307 0602 EC-262 CYL8MISFIRE P0308 0601 EC-262 ECM P0605 0301 EC-355 ECM-ABSTCSCOMM

NG EGRSYSTEM P0400 0302 EC-281 EGRSYSTEM P1402 0514 EC-423 EGRTEMPSEN/CIRC P1401 0305 EC-417 EGRCSOLENOID/V P1400 1005 EC-412 EGRC-BPTVALVE P0402 0306 EC-290 ENGINESPEEDSIG P0725 1207 AT-92 EVAPPURGFLOW/

MON EVAPSMALLLEAK P1440 0213 EC-432 EVAPSMALLLEAK P0440 0705 EC-298 EVAPSYSPRESSEN P0450 0704 EC-320 EVAPGROSSLEAK P0455 0715 EC-326

CONSULT-II

DTC*6

GST*2

— 0404 EC-500

P1447 0111 EC-457

ECM*1

Reference

page

Items

(CONSULT-IIscreen

terms)

FPCM/CIRCUIT P1220 1305 EC-393 FRO2SEHEATER-B1 P0135 0901 EC-204 FRO2SEHEATER-B2 P0155 1001 EC-204 FRONTO2SENSOR-B1 P0130 0303 EC-166 FRONTO2SENSOR-B1 P0133 0409 EC-187 FRONTO2SENSOR-B1 P0132 0410 EC-180 FRONTO2SENSOR-B1 P0131 0411 EC-174 FRONTO2SENSOR-B1 P0134 0412 EC-196 FRONTO2SENSOR-B2 P0153 0413 EC-187 FRONTO2SENSOR-B2 P0152 0414 EC-180 FRONTO2SENSOR-B2 P0151 0415 EC-174 FRONTO2SENSOR-B2 P0150 0503 EC-166 FRONTO2SENSOR-B2 P0154 0509 EC-196 FUELSYSLEAN/BK1 P0171 0115 EC-245 FUELSYSLEAN/BK2 P0174 0210 EC-245 FUELSYSRICH/BK1 P0172 0114 EC-251 FUELSYSRICH/BK2 P0175 0209 EC-251 FUELTEMPSEN/CIRC P0180 0402 EC-257 IACV/AACVLV/CIRC P0505 0205 EC-340 IGNSIGNAL-PRIMARY P1320 0201 EC-399 INT/VTIMCONT-B1 P1110 0805 EC-367 INT/VTIMCONT-B2 P1135 1301 EC-367 INTKTIMS/CIRC-B1 P1140 1303 EC-382 INTKTIMS/CIRC-B2 P1145 1304 EC-382 KNOCKSEN/CIRC-B1 P0325 0304 EC-267 KNOCKSEN/CIRC-B2 P0330 0212 EC-267 L/PRESSSOL/CIRC P0745 1205 AT-125 MAFSEN/CIRCUIT*3 P0100 0102 EC-124 MAP/BARSWSOL/CIR P1105 1302 EC-358 MULTICYLMISFIRE P0300 0701 EC-262 NATSMALFUNCTION — — EC-69 NODTCISDETECTED,

FURTHERTESTING MAYBEREQUIRED.

NODTCISDETECTED, FURTHERTESTING MAYBEREQUIRED.

O/RCLTCHSOL/CIRC P1760 1203 AT-143 OVERHEAT — 0208 EC-503 P-NPOSSW/CIRCUIT P1706 1003 EC-494 PNPSW/CIRC P0705 1101 AT-81 PURGCONT/V&S/V P1493 0312 EC-487

CONSULT-II

DTC*6

GST*2

P0000 0505 —

NoDTC Flashing*5 EC-65

ECM*1

Reference

page

EC-4

DIAGNOSTICTROUBLECODEINDEX

Alphabetical&PNo.IndexforDTC(Cont’d)

EXIT

Items

(CONSULT-IIscreen

terms)

PURGCONT/VS/V P1492 0807 EC-481 PURGVOLUME

CONT/V PURGVOLUME

CONT/V REARO2SENSOR-B1 P0137 0511 EC-210 REARO2SENSOR-B1 P0140 0512 EC-233 REARO2SENSOR-B1 P0139 0707 EC-226 REARO2SENSOR-B1 P0138 0510 EC-218 REARO2SENSOR-B2 P0158 0313 EC-218 REARO2SENSOR-B2 P0157 0314 EC-210 REARO2SENSOR-B2 P0160 0315 EC-233 REARO2SENSOR-B2 P0159 0708 EC-226 RRO2SEHEATER-B1 P0141 0902 EC-239 RRO2SEHEATER-B2 P0161 1002 EC-239 SFTSOLA/CIRC*3 P0750 1108 AT-129 SFTSOLB/CIRC*3 P0755 1201 AT-133 TACMSWSIGNALS P1210 0106 EC-390 TANDEMTPSEN/CIRC P1125 0110 EC-381 TCCSOLENOID/CIRC P0740 1204 AT-114 THRTLPOSSEN/

CIRC*3 TPSEN/CIRCA/T*3 P1705 1206 AT-137 TPSEN2/CIRCUIT P1120 0406 EC-375 TWCATALYSTSYS-B1 P0420 0702 EC-295 TWCATALYSTSYS-B2 P0430 0703 EC-295

UnabletoaccessECM — — EC-98 VCCUT/VBYPASS/V P1491 0311 EC-475 VC/VBYPASS/V P1490 0801 EC-470 VEHSPDSEN/CIRAT*4 P0720 1102 AT-89 VEHSPEEDSEN/

CIRC*4 VENTCONTROLVALVE P1446 0215 EC-452 VENTCONTROLVALVE P1448 0309 EC-464 VENTCONTROLVALVE P0446 0903 EC-315

CONSULT-II

DTC*6

GST*2

P1444 0214 EC-444

P0443 1008 EC-309

P0120 0403 EC-150

P0500 0104 EC-335

ECM*1

Reference

page

*1:InDiagnosticTestModeII(Self-diagnosticresults).These

numbersarecontrolledbyNISSAN. *2:ThesenumbersareprescribedbySAEJ2012. *3:Whenthefail-safeoperationoccurs,theMILilluminates. *4:TheMILilluminateswhenboththe“Revolutionsensorsig-

nal”andthe“Vehiclespeedsensorsignal”meetthefail-

safeconditionatthesametime. *5:Whileengineisrunning. *6:1sttripDTCNo.isthesameasDTCNo. NOTE:RegardingY33models,“-B1”and“BK1”indicatesleft

bankand“-B2”and“BK2”indicatesrightbank.

IDX

EC-5

PNO.INDEXFORDTC

DIAGNOSTICTROUBLECODEINDEX

Alphabetical&PNo.IndexforDTC(Cont’d)

EXIT

DTC*6

CONSULT-II

GST*2

— — UnabletoaccessECM EC-98 — 0107 ABS-TCSC/USIGNAL EC-500 — 0208 OVERHEAT EC-503

— 0404

— — NATSMALFUNC EC-69

NoDTC Flashing*5

P0000 0505

P0100 0102 MAFSEN/CIRCUIT*3 EC-124

P0105 0803 ABSLPRESSEN/CIRC EC-132

P0110 0401 AIRTEMPSEN/CIRC EC-140 P0115 0103 COOLANTTSEN/CIRC EC-145

P0120 0403

P0125 0908 *COOLANTSEN/CIRC EC-161

P0130 0303 FRONTO2SENSOR-B1 EC-166

P0131 0411 FRONTO2SENSOR-B1 EC-174

P0132 0410 FRONTO2SENSOR-B1 EC-180

P0133 0409 FRONTO2SENSOR-B1 EC-187

P0134 0412 FRONTO2SENSOR-B1 EC-196

P0135 0901 FRO2SEHEATER-B1 EC-204

P0137 0511 REARO2SENSOR-B1 EC-210

P0138 0510 REARO2SENSOR-B1 EC-218

P0139 0707 REARO2SENSOR-B1 EC-226

P0140 0512 REARO2SENSOR-B1 EC-233

P0141 0902 RRO2SEHEATER-B1 EC-239

P0150 0503 FRONTO2SENSOR-B2 EC-166

P0151 0415 FRONTO2SENSOR-B2 EC-174

P0152 0414 FRONTO2SENSOR-B2 EC-180

P0153 0413 FRONTO2SENSOR-B2 EC-187

P0154 0509 FRONTO2SENSOR-B2 EC-196

P0155 1001 FRO2SEHEATER-B2 EC-204

P0157 0314 REARO2SENSOR-B2 EC-210

P0158 0313 REARO2SENSOR-B2 EC-218

P0159 0708 REARO2SENSOR-B2 EC-226

P0160 0315 REARO2SENSOR-B2 EC-233

P0161 1002 RRO2SEHEATER-B2 EC-239

P0171 0115 FUELSYSLEAN/BK1 EC-245

P0172 0114 FUELSYSRICH/BK1 EC-251

P0174 0210 FUELSYSLEAN/BK2 EC-245

ECM*1

ECM-ABSTCSCOMM NG

NODTCISDETECTED, FURTHERTESTING MAYBEREQUIRED.

THRTLPOSSEN/ CIRC*3

Items

(CONSULT-IIscreen

terms)

Reference

page

EC-500

EC-65

—

EC-150

DTC*6

CONSULT-II

GST*2 P0175 0209 FUELSYSRICH/BK2 EC-251 P0180 0402 FUELTEMPSEN/CIRC EC-257 P0300 0701 MULTICYLMISFIRE EC-262 P0301 0608 CYL1MISFIRE EC-262 P0302 0607 CYL2MISFIRE EC-262 P0303 0606 CYL3MISFIRE EC-262 P0304 0605 CYL4MISFIRE EC-262 P0305 0604 CYL5MISFIRE EC-262 P0306 0603 CYL6MISFIRE EC-262 P0307 0602 CYL7MISFIRE EC-262 P0308 0601 CYL8MISFIRE EC-262 P0325 0304 KNOCKSEN/CIRC-B1 EC-267 P0330 0212 KNOCKSEN/CIRC-B2 EC-267 P0335 0802 CPS/CIRCUIT(OBD) EC-270 P0340 0101 CAMPOSSEN/CIR EC-275 P0400 0302 EGRSYSTEM EC-281 P0402 0306 EGRC-BPTVALVE EC-290 P0420 0702 TWCATALYSTSYS-B1 EC-295 P0430 0703 TWCATALYSTSYS-B2 EC-295 P0440 0705 EVAPSMALLLEAK EC-298

P0443 1008

P0446 0903 VENTCONTROLVALVE EC-315 P0450 0704 EVAPOSYSPRESSEN EC-320 P0455 0715 EVAPGROSSLEAK EC-326

P0500 0104

P0505 0205 IACV/AACVLV/CIRC EC-340 P0510 0203 CLOSEDTPSW/CIRC EC-346 P0600 0504 A/TCOMMLINE EC-352 P0605 0301 ECM EC-355 P0705 1101 PNPSW/CIRC AT-81 P0710 1208 ATFTEMPSEN/CIRC AT-85 P0720 1102 VEHSPDSEN/CIRAT*4 AT-89 P0725 1207 ENGINESPEEDSIG AT-92 P0731 1103 A/T1STGRFNCTN AT-95 P0732 1104 A/T2NDGRFNCTN AT-100 P0733 1105 A/T3RDGRFNCTN AT-104 P0734 1106 A/T4THGRFNCTN AT-108 P0740 1204 TCCSOLENOID/CIRC AT-114 P0744 1107 A/TTCCS/VFNCTN AT-118 P0745 1205 L/PRESSSOL/CIRC AT-125 P0750 1108 SFTSOLA/CIRC*3 AT-129

ECM*1

PURGVOLUME CONT/V

VEHSPEEDSEN/ CIRC*4

Items

(CONSULT-IIscreen

terms)

Reference

page

EC-309

EC-335

EC-6

DIAGNOSTIC TROUBLE CODE INDEX

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

EXIT

DTC*6

CONSULT-II

GST*2

P0755 1201 SFT SOL B/CIRC*3 AT-133

P1105 1302 MAP/BAR SW SOL/CIR EC-358 P1110 0805 INT/V TIM CONT-B1 EC-367 P1120 0406 TP SEN2/CIRCUIT EC-375 P1125 0110 TANDEM TP SEN/CIRC EC-381 P1135 1301 INT/V TIM CONT-B2 EC-367 P1140 1303 INTK TIM S/CIRC-B1 EC-382 P1145 1304 INTK TIM S/CIRC-B2 EC-382 P1148 0307 CLOSED LOOP-B1 EC-388

P1168 0308 CLOSED LOOP-B2 EC-388 P1210 0106 TACM SW SIGNALS EC-390 P1220 1305 FPCM/CIRCUIT EC-393 P1320 0201 IGN SIGNAL-PRIMARY EC-399 P1336 0905 CPS/CIRC (OBD) COG EC-407 P1400 1005 EGRC SOLENOID/V EC-412 P1401 0305 EGR TEMP SEN/CIRC EC-417 P1402 0514 EGR SYSTEM EC-423 P1440 0213 EVAP SMALL LEAK EC-432

P1444 0214

P1446 0215 VENT CONTROL VALVE EC-452

P1447 0111

P1448 0309 VENT CONTROL VALVE EC-464 P1490 0801 VC/V BYPASS/V EC-470

P1491 0311 VC CUT/V BYPASS/V EC-475 P1492 0807 PURG CONT/V S/V EC-481 P1493 0312 PURG CONT/V & S/V EC-487 P1605 0804 A/T DIAG COMM LINE EC-352 P1705 1206 TP SEN/CIRC A/T*3 AT-137 P1706 1003 P-N POS SW/CIRCUIT EC-494 P1760 1203 O/R CLTCH SOL/CIRC AT-143

ECM*1

PURG VOLUME CONT/V

EVAP PURG FLOW/ MON

Items

(CONSULT-II screen

terms)

Reference

page

EC-444

EC-457

*1: In Diagnostic Test Mode II (Self-diagnostic results). These

numbers are controlled by NISSAN.

*2: These numbers are prescribed by SAE J2012. *3: When the fail-safe operation occurs, the MIL illuminates. *4: The MIL illuminates when both the “Revolution sensor sig-

nal” and the “Vehicle speed sensor signal” meet the failsafe condition at the same time.

*5: While engine is running. *6: 1st trip DTC No. is the same as DTC No. NOTE: Regarding Y33 models, “-B1” and “BK1” indicates left

bank and “-B2” and “BK2” indicates right bank.

IDX

EC-7

PRECAUTIONS AND PREPARATION

Special Service Tool

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

Tool number (Kent-Moore No.) Tool name

(J38365-A) Heated oxygen sensor wrench

Description

Loosening or tightening heated oxygen sensor

EXIT

Tool name (Kent-Moore No.)

Leak detector (J41416)

EVAP service port adapter (J41413-OBD)

Hose clipper

NT636

Description

NT703

NT704

3/8 drive a: 22 mm (0.87 in)

Commercial Service Tools

Locating the EVAP leak

Applying positive pressure through EVAP service port

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

Fuel filler cap adapter

Socket wrench

NT720

Checking fuel tank vacuum relief valve opening pressure

NT653

Removing and installing engine coolant temperature sensor

NT705

EC-8

PRECAUTIONS AND PREPARATION

Commercial Service Tools (Cont’d)

EXIT

Tool name (Kent-Moore No.)

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

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

133AR or

Description

NT778

NT779

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

a: J-43897-18 18 mm dia. for Zirconia Oxygen

Sensor

b: J-43897-12 12 mm dia. for Titania Oxygen

Sensor

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

IDX

EC-9

PRECAUTIONS AND PREPARATION

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 Q45 is as follows: 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, 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 intentional 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. Spiral cable and wiring harnesses (except satellite sensor and side air bag module) covered with yellow insulation tape either just before the harness connectors or for the complete harness are related to the SRS.

EXIT

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 the

repair or inspection work. The open/short circuit of the related switches, sensors, solenoid valves,

etc. will cause the MIL to light up.

I Be sure to connect and lock the connectors securely after the work. The loose (unlocked) connec-

tor will cause the MIL to light up due to the open circuit. (Be sure to connect the connector without water, grease, dirt, bent terminals, etc. in it.)

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 clamp 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 the work. The misconnected or disconnected rub-

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

I Be sure to erase the unnecessary (already fixed) malfunction information in the ECM and TCM

(Transmission Control Module) before returning the vehicle to the customer.

EC-10

PRECAUTIONS AND PREPARATION

Engine Fuel & Emission Control System

EXIT

EC-11

IDX

SEF345WA

PRECAUTIONS AND PREPARATION

Precautions

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.

SEF289H

I When connecting ECM harness connector, tighten secur-

ing bolt until the gap between the orange indicators disappears.

:3-5N⋅m (0.3 - 0.5 kg-m, 26 - 43 in-lb)

EXIT

SEF308Q

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 input/output signal

inspection and make sure whether ECM functions properly or not. (See page EC-107.)

MEF040D

SEF217U

I After performing each TROUBLE DIAGNOSIS, perform

“OVERALL FUNCTION CHECK” or “DTC (Diagnostic Trouble Code) CONFIRMATION PROCEDURE”. 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.

EC-12

PRECAUTIONS AND PREPARATION

Precautions (Cont’d)

I When measuring ECM signals with a circuit tester, never

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

EXIT

SEF348N

SEF202UA

I Regarding model Y33, “-B1” indicates the left bank and

“-B2” indicates the right bank as shown in the figure.

EC-13

IDX

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Circuit Diagram

EXIT

TEC038M

EC-14

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Circuit Diagram (Cont’d)

EXIT

EC-15

IDX

TEC039M

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

System Diagram

EXIT

SEF815XA

EC-16

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location

EXIT

EC-17

IDX

SEF347W

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Engine Control Component Parts Location (Cont’d)

EXIT

SEF348W

SEF554T

SEF037T

SEF038TA

SEF392WA

SEF386X

SEF039T

SEF349W

EC-18

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Vacuum Hose Drawing

EXIT

1 Intake air duct to vacuum gallery A

2 Fuel pressure regulator to vacuum gallery B

3 Vacuum gallery A to EGRC-solenoid valve, MAP/BARO

switch solenoid valve and EVAP canister purge control solenoid valve

4 Intake manifold collector to EGRC-solenoid valve

5 EVAP canister purge control valve to EVAP canister purge

control solenoid valve

Refer to “System Diagram”, EC-16, for vacuum control system.

SEF208U

6 Intake manifold collector to One-way valve

7 One-way valve to EVAP canister purge control solenoid

valve

8 EGRC-BPT valve to EGRC-solenoid valve

9 Intake manifold collector to MAP/BARO switch solenoid

valve

Absolute pressure sensor to MAP/BARO switch solenoid

valve

Note: Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.

EC-19

IDX

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

System Chart

EXIT

Camshaft position sensor

Mass air flow sensor

Engine coolant temperature sensor

Front heated oxygen sensors

Ignition switch

Throttle position sensor

Closed throttle position switch

Park/Neutral position (PNP) switch (TCM)

Vehicle speed sensor

Air conditioner switch

Knock sensor

Battery voltage

Electrical load

Fuel injection &

ECM

mixture ratio control

Electronic ignition system

Idle air control system

Intake valve timing control

EGR control

Fuel pump control

Front heated oxygen sensor monitor & on board diagnostic system

Acceleration cut control

Injectors

Power transistor

IACV-AAC valve

Intake valve timing control

solenoid valve

EGRC-solenoid valve

Fuel pump relay and

Fuel pump control module

Malfunction indicator lamp

(On the instrument panel)

Air conditioner relay

Intake air temperature sensor

I EGR temperature sensor I Crankshaft position sensor (OBD) I Intake valve timing control position sensor I Absolute pressure sensor I EVAP control system pressure sensor I Fuel tank temperature sensor

Rear heated oxygen sensors*3

TCM (Transmission Control Module)*2

Power steering oil pressure switch

Secondary throttle position sensor

TCS signal

TAC module

EVAP canister purge flow control

Front & Rear heated oxygen sensors heater control

Cooling fan control

*1: These sensors are not used to control the engine system. They are used only for the on board diagnosis. *2: The DTC related to A/T and gear position will be sent to ECM. *3: This sensor is not used to control the engine system under normal conditions. *4: This switch will operate in place of the throttle position sensor to control EVAP parts if the sensor malfunctions.

I EVAP canister purge volume

control valve

I EVAP canister purge control

solenoid valve

Front & Rear heated oxygen

sensor heaters

Cooling fan relay

I EVAP canister vent control

valve

I Vacuum cut valve bypass

valve

I MAP/BARO switch solenoid

valve

EC-20

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

INPUT/OUTPUT SIGNAL LINE

Camshaft position sensor

Mass air flow sensor

Engine coolant temperature sensor

Front heated oxygen sensor

Throttle position sensor

Multiport Fuel Injection (MFI) System

Engine speed and piston position

Amount of intake air

Engine coolant temperature

Density of oxygen in exhaust gas

Throttle position

Throttle valve idle position

EXIT

PNP switch (TCM)

Vehicle speed sensor

Ignition switch

Battery

Rear heated oxygen sensor*

Secondary throttle position sensor

*: Under normal conditions, this sensor is not used to control the engine system.

TAC module

Park/Neutral position

Vehicle speed

Start signal

Battery voltage

Density of oxygen in exhaust gas

Secondary throttle valve opening angle

BASIC MULTIPORT FUEL INJECTION SYSTEM

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 camshaft position sensor and the mass air flow sensor.

ECM

Injector

VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION

The amount of fuel injected is compensated for to improve engine performance. This will be made under various operating conditions as listed below. <Fuel increase>

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 speed operation I Extremely high engine coolant temperature I During TCS operation I During high engine speed operation

IDX

EC-21

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

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

MIXTURE RATIO FEEDBACK CONTROL

The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control. The three way catalyst can then better reduce CO, HC and NOx emissions. This system uses a front heated oxygen sensor in the exhaust manifold to monitor if the engine is rich or lean. The ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about front heated oxygen sensor, refer to pages EC-166. This maintains the mixture ratio within the range of stoichiometric (ideal air-fuel mixture).

MEF025DH

This stage is referred to as the closed loop control condition. Rear heated oxygen sensor is located downstream of the three way catalyst. Even if the switching characteristics of the front heated oxygen sensor shift, the air-fuel ratio is controlled to stoichiometric by the signal from the rear heated oxygen sensor.

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 front heated oxygen sensor or its circuit I Insufficient activation of front heated oxygen sensor at low

engine coolant temperature

I High-engine coolant temperature I During warm-up I When starting the engine

EXIT

MIXTURE RATIO SELF-LEARNING CONTROL

The mixture ratio feedback control system monitors the mixture ratio signal transmitted from the front heated oxygen sensor. 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 film) 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 front heated oxygen sensor 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 longterm 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.

EC-22

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

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

FUEL INJECTION SYSTEM

Two types of systems are used.

Sequential multiport fuel injection system

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

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 mode (CPU) or crankshaft position sensor (REF) is operating.

FUEL SHUT-OFF

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

EXIT

INPUT/OUTPUT SIGNAL LINE

Camshaft position sensor

Mass air flow sensor

Engine coolant temperature sensor

Throttle position sensor

Vehicle speed sensor

Ignition switch

Knock sensor

PNP switch (TCM)

Battery

Secondary throttle position sensor

MEF404E

TAC module

Electronic Ignition (EI) System

Engine speed and piston position

Amount of intake air

Engine coolant temperature Throttle position

Throttle valve idle position

Vehicle speed

Start signal

Engine knocking

Park/Neutral position

Battery voltage

Throttle position (Secondary throttle position sensor)

ECM

Power

transistor

IDX

EC-23

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

Electronic Ignition (EI) System (Cont’d)

SYSTEM DESCRIPTION

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 below. The ECM detects information such as the injection pulse width and camshaft position sensor signal. Responding to this information, ignition signals are transmitted to the power transistor.

e.g. N: 1,800 rpm, Tp: 1.50 msec

A °BTDC

SEF742M

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in the ECM. 1 At starting 2 During warm-up 3 At idle 4 Hot engine operation 5 At 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.

EXIT

INPUT/OUTPUT SIGNAL LINE

Air conditioner switch

Throttle position sensor

Camshaft position sensor

Ignition switch

Secondary throttle position sensor

TAC module

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. I After a few seconds when the TCS has started

operating.

Air Conditioning Cut Control

Air conditioner “ON” signal

Throttle valve opening angle

Engine speed

Start signal

Secondary throttle valve opening angle

ECM

Air conditioner

relay

EC-24

ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTION

INPUT/OUTPUT SIGNAL LINE

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

EXIT

Vehicle speed sensor

PNP switch (TCM)

Throttle position sensor

Engine coolant temperature sensor

Camshaft position sensor

Vehicle speed

Park/Neutral position

Throttle position

Engine coolant temperature

Engine speed and piston position

If the engine speed is above 1,400 rpm with no load (for example, in neutral and engine speed over 1,400 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 1,000 rpm, then fuel cut is cancelled.

NOTE: This function is different than deceleration control listed under multiport fuel injection on EC-21.

ECM

Injectors

IDX

EC-25

EVAPORATIVE EMISSION SYSTEM

Description

EXIT

SEF523Y

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. This is where the vapor is stored when the engine is not operating. The vapor in the EVAP canister is purged by the air flowing through the EVAP canister purge volume control valve which is controlled by engine control module. When the engine operates, the flow rate of vapor controlled by the EVAP canister purge volume control valve is proportionally regulated as the air flow increases. The EVAP canister purge control valve shuts off the vapor purge line during decelerating and idling; under normal operating conditions the valve is usually open.

SEF210U

Inspection

EVAP CANISTER

Check EVAP canister as follows:

1. Pinch the fresh air hose.

2. Blow air into port

and check that it flows freely out of port

EC-26

EVAPORATIVE EMISSION SYSTEM

Inspection (Cont’d)

TIGHTENING TORQUE

Tighten EVAP canister as shown in the figure.

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

EXIT

SEF231SA

SEF427N

SEF943S

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 psi)

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

, −0.87 to

EVAP CANISTER PURGE CONTROL VALVE

Refer to EC-488.

VACUUM CUT VALVE AND VACUUM CUT VALVE BYPASS VALVE

Refer to EC-475.

EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VOLUME CONTROL VALVE

Refer to EC-444.

EVAPORATIVE EMISSION (EVAP) CANISTER PURGE CONTROL SOLENOID VALVE

Refer to EC-488.

FUEL TANK TEMPERATURE SENSOR

Refer to EC-257.

EC-27

IDX

EVAPORATIVE EMISSION SYSTEM

Inspection (Cont’d)

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.

SEF462UA

HOW TO DETECT FUEL VAPOR LEAKAGE

CAUTION:

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

in EVAP system.

NOTE: I Improper installation of adapter to the service port may

cause a leak.

SEF200U

PEF658U

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

2. Also attach the pressure pump and hose.

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 adapter and hose with pressure pump.

8. Locate the leak using a leak detector. Refer to “Evaporative Emission Line Drawing”, EC-29.

, 0.6 psi) of pressure

EXIT

SEF598U

SEF599U

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

1. Attach the adapter securely to the EVAP service port and pressure pump with pressure gauge to the EVAP service port.

2. 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.

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

, 0.2 - 0.4 psi).

4. Remove adapter and hose with pressure pump.

5. Locate the leak using a leak detector. Refer to “Evaporative Emission Line Drawing”, EC-29.

EC-28

EVAPORATIVE EMISSION SYSTEM

Evaporative Emission Line Drawing

EXIT

SEF211U

Note: Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.

EC-29

IDX

EVAPORATIVE EMISSION SYSTEM

Evaporative Emission Line Drawing (Cont’d)

EXIT

SEF369U

EC-30

SYSTEM DESCRIPTION

EVAPORATIVE EMISSION SYSTEM

On Board Refueling Vapor Recovery (ORVR)

EXIT

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 Puta“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

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-37. 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. I Continued refueling may cause fuel overflow, resulting in fuel spray and possibly a fire.

fire extinguisher.

SEF206V

EC-31

IDX

EVAPORATIVE EMISSION SYSTEM

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

DIAGNOSTIC PROCEDURE

SYMPTOM: Fuel odor from EVAP canister is strong.

INSPECTION START

EXIT

CHECK COMPONENT (EVAP canister). Check EVAP canister for water. Weigh the EVAP canister with vent control valve attached. If the weight is:

More than 1.8 kg (4 lb) → NG Less than 1.8 kg (4 lb) → OK

If OK, check that water drains from the canister.

Water should not drain from the EVAP canister.

CHECK COMPONENT (Refueling EVAP vapor cut valve). Check refueling EVAP vapor cut valve for open. Refer to “COMPONENT INSPECTION”, EC-34.

CHECK COMPONENT (Refueling control valve). Check refueling control valve diaphragm

for damage. Blow air into hose end and check that there is no air flow. Refer to “COMPONENT INSPECTION”, EC-34.

Replace EVAP canister.

Replace refueling EVAP

vapor cut valve with fuel tank.

Replace refueling control

valve with fuel tank.

INSPECTION END

EC-32

EVAPORATIVE EMISSION SYSTEM

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

SYMPTOM: Cannot refuel/Fuel odor from the fuel filler open-

ing is strong while refueling.

EXIT

INSPECTION START

CHECK COMPONENT (Water separator and EVAP canister).

1. Check water separator for insect nests or debris. Refer to “COMPONENT INSPECTION”, EC-441.

2. Weigh the EVAP canister with vent control valve attached. If the weight is:

More than 1.8 kg (4 lb) → NG Less than 1.8 kg (4 lb) → OK

If OK, check that water drains from the canister.

Water should not drain from the EVAP canister.

CHECK COMPONENT (Vent hoses and vent tubes). Check hoses and tubes between EVAP canister and refueling control valve for clogging, kink, looseness and improper connection.

CHECK COMPONENT (Filler neck tube). Check signal line and recirculation line for clogging, dents and cracks.

Replace water separator or

EVAP canister.

Repair or replace hoses

and tubes.

Replace filler neck tube.

CHECK COMPONENT (Refueling control valve). Refer to “COMPONENT INSPECTION” on next page.

CHECK COMPONENT (Refueling EVAP vapor cut valve). Refer to “COMPONENT INSPECTION” on next page.

CHECK COMPONENT (Fuel filler tube).

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

2. Check one-way fuel valve for clogging. Refer to “COMPONENT INSPECTION” on next page.

INSPECTION END

Replace refueling control

valve with fuel tank.

Replace fuel tank with

refueling EVAP vapor cut valve.

Replace fuel filler tube or

replace one-way fuel valve with fuel tank.

IDX

EC-33

EVAPORATIVE EMISSION SYSTEM

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

COMPONENT INSPECTION Refueling control valve

Check refueling control valve as follows:

1. Remove fuel filler cap.

2. Check air continuity between hose ends

Blow air into the hose end

3. Blow air into hose end

4. Apply pressure to both hose ends

. Air should flow freely into the fuel tank.

and check there is no leakage.

and

a suitable 3-way connector. And check there is no leakage.

If NG, replace refueling control valve with fuel tank.

and

[20 kPa (150 mmHg, 5.91 inHg)] using a pressure pump and

EXIT

SEF817X

SEF816X

Refueling EVAP vapor cut valve

1. Remove fuel tank. Refer to “FUEL SYSTEM” in FE section. 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.

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

container.

2. 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

), and check that the air flows freely into the tank.

3. Check EVAP vapor cut valve for being stuck to open as following.

a. Connect vacuum pump to hose ends

and

using a suit-

able 3-way connector.

b. Remove fuel gauge retainer with fuel gauge unit.

Always replace O-ring with new one.

EC-34

EVAPORATIVE EMISSION SYSTEM

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

c. Put fuel tank upside down. d. Apply vacuum pressure to both hose ends

kPa (−100 mmHg, −3.94 inHg)] with fuel gauge retainer remaining open and check that the pressure is applicable. If NG, replace refueling EVAP vapor cut valve with fuel tank.

One-way fuel valve

1. Drain fuel from the tank. Refer to “COMPONENT INSPECTION” of refueling EVAP vapor cut valve on previous page.

2. Remove fuel filler tube and hose.

3. Check one-way fuel valve for operation as follows. When pushing with finger, the valve should open; when finger is released, the valve should shut.

Do not drop any material into the tank.

If NG, replace one-way fuel valve with fuel tank.

SEF818X

EXIT

and

[−13.3

EC-35

IDX

POSITIVE CRANKCASE VENTILATION

Description

EXIT

This system returns blow-by gas to both the intake manifold and air cleaner. 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 cleaner, through the hose connecting air cleaner to rocker cover, into the crankcase. Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve, and its flowgoes through the hose connection in the reverse direction. On vehicles with an excessively high blow-by some of the flow will go through the hose connection to the air cleaner under all conditions.

SEF110T

Inspection

PCV (Positive Crankcase Ventilation) VALVE

With engine running at idle, remove ventilation hose from PCV valve; if 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.

SEF244Q

PCV 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.

ET277

EC-36

BASIC SERVICE PROCEDURE

Fuel Pressure Release

Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

1. Start engine.

2. Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT” mode with CONSULT-II. (Touch “START” and after engine stalls, crank it two or three times to release all fuel pressure.)

3. Turn ignition switch off.

EXIT

SEF394X

SEF111T

SEF112T

1. Remove fuse for fuel pump.

2. Start engine.

3. After engine stalls, crank it two or three times to release all fuel pressure.

4. Turn ignition switch off and reconnect fuel pump fuse.

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.

1. Release fuel pressure to zero, refer to previous page.

2. Disconnect fuel hose between fuel filter and fuel tube (engine side).

3. Install pressure gauge between fuel filter and fuel tube.

4. Start engine and check for fuel leakage.

SEF718B

SEF114T

5. Read the indication of fuel pressure gauge.

At idling:

Approximately 235 kPa (2.4 kg/cm A few seconds after ignition switch is turned OFF to ON:

Approximately 294 kPa (3.0 kg/cm

6. Stop engine and disconnect fuel pressure regulator vacuum hose from intake manifold.

7. Plug intake manifold with a rubber cap.

8. Connect variable vacuum source to fuel pressure regulator.

9. 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.

, 34 psi)

, 43 psi)

EC-37

IDX

BASIC SERVICE PROCEDURE

Injector Removal and Installation

EXIT

SEF245QB

SEF113T

1. Release fuel pressure to zero, refer to previous page.

2. Remove intake manifold collector. Refer to EM section (“TIMING CHAIN”).

3. Disconnect vacuum hose from pressure regulator.

4. Disconnect fuel hoses from fuel tube assembly.

I Do not disassemble fuel tube assembly.

5. Disconnect injector harness connectors.

6. Remove injectors with fuel tube assembly.

I Push injector tail piece. I Do not pull on the connector.

7. Push out any malfunctioning injector from fuel tube assembly.

8. Replace or clean injector as necessary.

9. Install injector to fuel tube assembly.

I Always replace O-rings with new ones. I Lubricate O-rings with a smear of engine oil.

10. Install injectors with fuel tube assembly to intake manifold.

Tighten in numerical order shown in the figure.

a) First, tighten all bolts to 9.3 to 10.8 N⋅m (0.95 to 1.1 kg-m, 6.9

to 8.0 ft-lb).

b) Then, tighten all bolts to 21 to 26 N⋅m (2.1 to 2.7 kg-m, 15 to

20 ft-lb).

11. Install fuel hoses to fuel tube assembly.

12. Reinstall any parts removed in reverse order of removal.

CAUTION:

After properly connecting fuel hose to injector and fuel tube assembly, check connection for fuel leakage.

EC-38

BASIC SERVICE PROCEDURE

Throttle Opener

INSPECTION

1. Start engine and let it idle.

2. Confirm the amount of the rod moves “L” more than 1.65 mm (0.0650 in), the throttle drum becomes free from the rod of the throttle opener.

If NG, go to next step. If OK, inspection is end.

EXIT

SEF910X

SEF109L

SEF368U

3. Turn ignition switch “OFF”.

4. Check vacuum source to throttle opener.

a. Check vacuum hose for disconnection or improper connection. b. Remove vacuum hose connected to throttle opener. c. Attach a vacuum gauge to vacuum hose, which is discon-

nected.

d. Start engine and let it idle. e. Make sure that the vacuum is more than −40.0 kPa (−300

mmHg, −11.81 inHg).

f. Remove the vacuum gauge from intake manifold.

If NG, go to next step. If OK, go to step 7.

5. Check vacuum hose for clogging and cracks. If NG, replace or clean vacuum hose. If OK, go to next step.

6. Blow air into the intake manifold and make sure air flows freely. If NG, replace or clean intake manifold. If OK, go to next step.

SEF793W

7. Check throttle opener.

a. Connect suitable vacuum hose to vacuum pump as shown at

left.

b. Apply vacuum [more than −40.0 kPa (−300 mmHg, −11.81

inHg)] until the throttle drum becomes free from the rod of the throttle opener.

c. Confirm the amount of the rod moves more than 1.65 mm

(0.0650 in), and also the throttle drum becomes free from the rod of the throttle opener. If NG, go to next step.

8. Check visually for cracking and/or distortion of throttle opener and rod. If NG, replace throttle opener. If OK, install the vacuum hose and repeat from step 1 to 2.

EC-39

IDX

BASIC SERVICE PROCEDURE

Fast Idle Cam (FIC) Inspection and Adjustment

1. Remove throttle body from engine.

2. Wait for at least 3 hours. (This step is necessary to bring the temperature of the thermoelement to the room temperature

3. Measure thermo-element stroke (L) and room temperature.

4. Check thermo-element stroke (L) as shown in the figure.

CAUTION:

Do not adjust TAS.

L: Thermo-element stroke Judgement

Within oblique line

Out of oblique line

SEF292TA

Thermo-element is normal , Adjust

FI cam (go to step 5).

Replace thermo-element , Adjust FI

cam (go to step 2).

EXIT

5. Measure clearance between stopper and throttle adjusting screw (TAS) as shown in the figure. If out of specification, adjust the clearance using adjusting screw.

CAUTION:

Do not adjust throttle adjusting screw (TAS).

6. After adjustment, tighten lock nut of adjusting screw.

: 1.5 - 2.0 N⋅m (0.15 - 0.2 kg-m, 13.0 - 17.4 in-lb)

7. Reinstall throttle body.

8. After warming up engine, check that there is a clearance between FI cam and roller.

SEF293T

SEF294T

Direct Ignition System — How to Check Idle Speed and Ignition Timing

SEF392X

IDLE SPEED I Method A (Using CONSULT-II)

Check idle speed in “DATA MONITOR” mode with CONSULT-II.

EC-40

BASIC SERVICE PROCEDURE

Direct Ignition System — How to Check Idle Speed and Ignition Timing (Cont’d)

I Method B (Using check connector)

Check the idle speed using check connector as shown in the figure. (Check connector is located in the harness protector).

EXIT

SEF553T

SEF295T

SEF296T

IGNITION TIMING

Any of the following two methods may be used.

I Method A

1. Attach timing light to loop wire as shown.

2. Check ignition timing.

I Method B

1. Remove intake air duct.

2. Remove No. 1 ignition coil.

SEF297T

3. 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.

4. Install air duct.

5. Check ignition timing.

SEF011V

EC-41

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

EXIT

PREPARATION

I Make sure that the following parts are in

good order. (1) Battery (2) Ignition system (3) Engine oil and coolant levels (4) Fuses (5) ECM harness connector (6) Vacuum hoses (7) Air intake system

(Oil filler cap, oil level gauge, etc.) (8) Fuel pressure (9) Engine compression (10) EGR valve operation (11) Throttle valve (12) EVAP system

Overall inspection sequence

INSPECTION START

Perform diagnostic test mode II (Self-diagnostic results).

Check & adjust ignition timing.

I On air conditioner equipped models, checks

should be carried out while the air conditioner is “OFF”.

I When checking idle speed, ignition timing

and mixture ratio of A/T models, shift lever to “N” position.

I When measuring “CO” percentage, insert

probe more than 40 cm (15.7 in) into tail pipe.

I Turn off headlamps, heater blower, rear win-

dow defogger.

I Keep front wheels pointed straight ahead. I Make the check after the cooling fan has

stopped.

Repair or replace.

Check & adjust idle speed.

Check function of front heated oxygen sensors.

INSPECTION END

Check harnesses of front

heated oxygen sensors.

Repair or replace har-

ness(es).

Check CO%.

I Replace front heated

oxygen sensors.

I Check function of front

heated oxygen sensors.

Check emission control parts and repair or replace if necessary.

EC-42

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

START

Visually check the following:

I Air cleaner clogging I Hoses and ducts for leaks I EGR valve operation I Electrical connectors I Gasket I Throttle position

SEF246F

Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge and ensure that engine speed is below 1,000 rpm.

Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.

SEF247F

Perform diagnostic test mode II (Self-diagnostic results).

OK NG

Repair or replace components as necessary.

EXIT

SEF217U

SEF248F

Does engine run smoothly?

OK NG

Race engine two or three times under no-load, then run engine at idle speed.

1. Turn off engine and disconnect throttle position sensor harness connector.

2. Start engine.

Check ignition timing with a timing light.

15°±2° BTDC (in “N” position)

OK NG

Adjust ignition timing by turning camshaft position sensor after loosening securing bolts which secures camshaft position sensor.

Connect throttle position sensor harness connector.

Clean injectors.

IDX

SEF212U

EC-43

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

Connect throttle position sensor harness connector.

Check target idle speed.

SEF043T

SEF392X

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Read idle speed in “DATA MONITOR” mode with CONSULT-II

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Check idle speed.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

650±50 rpm (in “N” position)

OK NG

Disconnect throttle position sensor harness connector.

EXIT

SEF212U

SEF115T

Adjust base idle speed by turning idle speed adjusting screw.

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

600±25 rpm (in “N” position)

1) Connect throttle position sensor harness connector.

2) Erase diagnostic trouble code, EC-67.

Run engine at about 2,000 rpm for about 2 minutes under no-load.

SEF247F

EC-44

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EXIT

SEF957D

SEF393X

SEF217U

Set on board diagnostic system of ECM to Diagnostic Test Mode II (Front heated oxygen sensor monitor).*

Check left bank front heated oxygen sensor signal.

1) See “FR O2 SEN MNTR-B1 and B2 (left and right sides)” in “Data monitor” mode.

2) Maintaining engine at 2,000 rpm under no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

1 cycle: RICH → LEAN → RICH 2 cycles: RICH → LEAN → RICH →

--------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------Make sure that malfunction indicator lamp goes on and off more than 5 times during 10 seconds at 2,000 rpm.

LEAN → RICH

Replace left bank front heated oxygen sensor.

Check left bank front heated oxygen sensor signal.

1) See “FR O2 SEN MNTR-B1 and B2 (right and left sides)” in “Data monitor” mode.

2) Maintaining engine at 2,000 rpm under no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

1 cycle: RICH → LEAN → RICH 2 cycles: RICH → LEAN → RICH →

LEAN → RICH

--------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------Make sure that malfunction indicator lamp goes on and off more than 5 times during 10 seconds at 2,000 rpm.

Monitor does not fluctuate. Malfunction indicator lamp does not blink.

Less than 5 times

*: If the battery is weak, front heated oxygen sensor monitor may not func-

tion properly. Use this function after fully charging battery.

EC-45

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EXIT

SEF393X

SEF217U

Check right bank front heated oxygen sensor signal.

1) See “FR O2 SEN MNTR-B1 and -B2 (left and right sides)” in “Data monitor” mode.

2) Maintaining engine at 2,000 rpm under no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

1 cycle: RICH → LEAN → RICH 2 cycles: RICH → LEAN → RICH →

LEAN → RICH

--------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------Make sure that malfunction indicator lamp goes on and off more than 5 times during 10 seconds at 2,000 rpm.

END

Replace right bank front heated oxygen sensor.

Less than 5 times

Monitor does not fluctuate. Malfunction indicator lamp does not blink.

Check right bank front heated oxygen sensor signal.

1) See “FR O2 SEN MNTR-B1 and -B2

(left and right sides)” in “Data monitor” mode.

2) Maintaining engine at 2,000 rpm under

no-load (engine is warmed up sufficiently.), check that the monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

1 cycle: RICH → LEAN → RICH 2 cycles: RICH → LEAN → RICH →

LEAN → RICH

--------------------------------------------------------------------------------------------------------------------------------------------------------------------OR-------------------------------------------------------------------------------------------------------------------------------------------------------------------Make sure that malfunction indicator lamp goes on and off more than 5 times during 10 seconds at 2,000 rpm.

END

EC-46

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EXIT

SEF213U

SEF214U

Check right bank front heated oxygen sensor harness:

1) Turn off engine and disconnect battery ground cable

2) Disconnect ECM harness connector from ECM.

3) Disconnect right bank front heated oxygen sensor harness connector.

4) Check for continuity between terminal No. 82 of ECM harness connector and harness connector for front heated oxygen sensor.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Continuity exists. ........................................................................OK

Continuity does not exist...........................................................NG

Repair or replace ECM harness.

Connect ECM harness connector to ECM.

Check left bank front heated oxygen sensor harness:

1) Turn off engine and disconnect battery ground cable

2) Disconnect ECM harness connector from ECM.

3) Disconnect left bank front heated oxygen sensor harness connector.

4) Check for continuity between terminal No. 83 of ECM harness connector and harness connector for front heated oxygen sensor.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Continuity exists. ........................................................................OK

Continuity does not exist...........................................................NG

OK NG

Repair or replace ECM harness.

Connect ECM harness connector to ECM.

EC-47

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

1) Select “ENG COOLANT TEMP” in “ACTIVE TEST” mode.

2) Set “COOLANT TEMP” to 5°C (41°F) by touching “DWN”

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

SEF760X

Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

Race engine two or three times under no-load, then run engine at idle speed.

and “Qd”.

1) Disconnect engine coolant temperature sensor harness connector.

2) Connect a resistor (4.4 kΩ) between terminals of engine coolant temperature sensor harness connector.

EXIT

SEF858QA

SEF246F

SEF248F

Check “CO” %.

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Idle CO: 0.4 - 9.4% with engine running smoothly

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------After checking CO%,

1) Disconnect the resistor from terminals of engine coolant tempera-

ture sensor.

2) Connect engine coolant temperature sensor harness connector to engine coolant temperature sensor.

Connect front heated oxygen sensor harness connectors to front heated oxygen sensors.

Check fuel pressure regulator.

Check mass air flow sensor.

Check injector. Clean or replace if necessary.

Check engine coolant temperature sensor.

Check ECM function* by substituting another known good ECM.

*: ECM may be the cause of a problem, but this is rarely the case.

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.

EC-48

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Introduction

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:

I Diagnostic Trouble Code (DTC) .................................................................................Mode 3 of SAE J1979

I Freeze Frame data.....................................................................................................Mode 2 of SAE J1979

I System Readiness Test (SRT) code ..........................................................................Mode 1 of SAE J1979

I 1st Trip Diagnostic Trouble Code (1st Trip DTC).......................................................Mode 7 of SAE J1979

I 1st Trip Freeze Frame data

I Test values and Test limits .........................................................................................Mode 6 of SAE J1979

The above information can be checked using procedures listed in the table below.

DTC 1st trip DTC

Diagnostic test mode II (Selfdiagnostic results)

CONSULT-II XXXXX— GST X X*2 X — X X

*1: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other. *2: 1st trip DTCs for self-diagnoses concerning SRT items cannot be shown on the GST display.

XX*1————

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-98.).

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

Misfire (Possible three way catalyst damage) — DTC: P0300 - P0308 (0701, 0608 - 0601) is being detected

Misfire (Possible three way catalyst damage) — DTC: P0300 - P0308 (0701, 0608 - 0601) has been detected

Closed loop control — DTC: P1148 (0307), P1168 (0308)

Fail-safe items (Refer to EC-98.) — X X*1 — X*1 — Except above — — X X X X

*1: Except “ECM”.

1st trip

Blinking Lighting up

X——X—X—

—X—X—X—

MIL DTC 1st trip DTC

2nd trip

lighting up

1st trip

displaying

2nd trip

displaying

1st trip

displaying

2nd trip

displaying

IDX

EXIT

EC-49

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 first trip DTC did not reoccur, the first 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 first 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 first 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”. Refer to EC-63. For malfunctions in which 1st trip DTCs are displayed, refer to EC-60. 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 page EC-89. Then perform “Diagnostic trouble code confirmation procedure” or “Overall function check” to try to duplicate the problem. If the malfunction is duplicated, the item requires repair.

EXIT

How to read DTC and 1st trip DTC

DTC and 1st trip DTC can be read by the following methods.

1. The number of blinks of the malfunction indicator lamp in the Diagnostic Test Mode II (Self-Diagnostic Results) Examples: 0101, 0201, 1003, 1104, etc. These DTCs are controlled by NISSAN.

2. 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, Mode II and GST do 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 is shown at left. 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]”.

EC-50

SEF698X

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

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 and vehicle speed 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. The data, stored together with the DTC data, are called freeze frame data and are 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-77. Only one set of freeze frame data (either 1st trip freeze frame data of 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 - P0308 (0701, 0608 - 0601)

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 frame 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”. Refer to EC-63.

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. 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.

Fuel Injection System Function — DTC: P0171 (0115), P0172 (0114)

IDX

EXIT

EC-51

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”.

EXIT

SRT item

(CONSULT-II indication)

CATALYST 3 Three way catalyst function P0420, P0430

EVAP SYSTEM

O2 SENSOR 3

O2 SEN HEATER 3

EGR SYSTEM

Performance

Priority*2

—

3 1 EGR function (open) P1402

Required self-diagnostic items to set the

SRT to “CMPLT”

EVAP control system (small leak) (negative pressure)

EVAP control system (small leak) (positive pressure)

EVAP control system purge flow monitoring

Front heated oxygen sensor (circuit) P0130, P0150 Front heated oxygen sensor (lean shift

monitoring) Front heated oxygen sensor (rich shift

monitoring) Front heated oxygen sensor (response

monitoring) Front heated oxygen sensor (high voltage) P0134, P0154 Rear heated oxygen sensor (min. voltage

monitoring) Rear heated oxygen sensor (max. voltage

monitoring) Rear heated oxygen sensor (response

monitoring) Rear heated oxygen sensor (high voltage) P0140, P0160 Front heated oxygen sensor heater P0135, P0155 Rear heated oxygen sensor heater P0141, P0161 EGR function (close) P0400 EGRC-BPT valve function P0402

Corresponding DTC No.

P0440

P1440*1

P1447

P0131, P0151

P0132, P0152

P0133, P0153

P0137, P0157

P0138, P0158

P0139, P0159

*1: P1440 [EVAPcontrol system (small leak) (positive pressure) diagnosis] is one type of SRT related diagnosis. This diagnosis, 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.

EC-52

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

SRT Set Timing

SRT is set as “CMPLT” after self-diagnosis has been performed one or more times. Completion of SRT is 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

Case 1

All OK

Case 2

NG exists Case 3

Diagnosis

P0400 OK (1) — (1) OK (2) — (2) P0402 OK (1) — (1) — (1) OK (2) P1402 OK (1) OK (2) — (2) — (2)

SRT of EGR “CMPLT” “CMPLT” “CMPLT” “CMPLT”

P0400 OK (1) — (1) — (1) — (1) P0402 — (0) — (0) OK (1) — (1) P1402 OK (1) OK (2) — (2) — (2)

SRT of EGR “INCMP” “INCMP” “CMPLT” “CMPLT”

P0400 OK OK — — P0402 ————

P1402 NG — NG

(1st trip)

DTC

SRT of EGR “INCMP” “INCMP” “INCMP” “CMPLT”

+ ON , OFF + ON , OFF + ON , OFF + ON ,

1st trip DTC — 1st trip DTC

Ignition cycle

(Consecutive

NG)

DTC

(= MIL “ON”)

EXIT

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 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”.

SRT Service Procedure

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.

IDX

EC-53

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EXIT

*1 EC-50 *2 EC-54 *3 EC-55

How to display SRT code

1. 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.

2. Selecting Mode 1 with GST (Generic Scan Tool)

SEF573XA

EC-54

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

A sample of CONSULT-II display for SRT code is shown at left. “INCMP” means the self-diagnosis is incomplete and SRT is not set. “CMPLT” means the self-diagnosis is complete and SRT is set.

EXIT

PEF215U

How to Set SRT Code

To set all SRT codes, 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-52.

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.

EC-55

IDX

Driving pattern

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EXIT

SEF574X

EC-56

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EXIT

I The time required for each diagnosis varies with road sur-

face conditions, weather, altitude, individual driving 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 per-

formed if the diagnosis is not completed within zone A. *: Normal conditions refer to the following: — Sea level — Flat road — Ambient temperature: 20 - 30°C (68 - 86°F) — Diagnosis is performed as quickly as possible under nor-

mal conditions. Under different conditions [For example: ambient temperature is other than 20 - 30°C (68 - 86°F)], diagnosis may also be performed.

Pattern 1: I The engine is started at the engine coolant tem-

Pattern 2: I When steady-state driving is performed again

Pattern 3: I The driving pattern outlined in *2 must be Pattern 4: I Tests are performed after the engine has been

*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 it idle.

2) Repeat driving pattern shown below at least 10 times.

3) Repeat steps and 2 until the EGR system SRT is set.

perature of −10 to 35°C (14 to 95°F) (where the voltage between the ECM terminals is 3.0 - 4.3 V.)

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 terminals

I The engine is started at a fuel tank temperature

warmer than 0°C (32°F) (where the voltage between the ECM terminal than 4.1V).

even after it is interrupted, each diagnosis can be conducted. In this case, the time required for diagnosis may be extended.

repeated at least 3 times. 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.

I During acceleration, hold the accelerator pedal

as steady as possible.

and

128

is lower than 1.4 V.)

and ground is less

Suggested transmission gear position

Set the selector lever in the “D” position with “OD” ON.

Suggested maximum speed in each gear

Downshift to a lower gear if the engine is not running smoothly, or if you need to accelerate. Do not exceed the maximum suggested speed (shown below) in any gear. For level road driving, use the highest gear suggested for that speed. Always observe posted speed limits, and drive according to the road conditions, which will ensure safe operation. Do not over-rev the engine when

and

128

shifting to a lower gear as it may cause engine damage or loss of vehicle control.

Gear km/h (MPH) 1st 50 (30) 2nd 95 (60) 3rd 145 (90) 4th — 5th —

SEF414S

*3: Checking the vehicle speed with GST is advised.

IDX

EC-57

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

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 ECM during self-diagnosis. The test limit is a reference value which is specified as the 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 (14 test items). These data (test limit) are specified by Test ID (TID) and Component ID (CID). These data can be displayed on the GST screen.

—: Not applicable

SRT item

CATALYST

EVAP SYSTEM

Self-diagnostic test

Three way catalyst

(Right bank)

EVAP control sys-

(Small leak)

EVAP control sys-

tem purge flow

Front heated oxy-

gen sensor (Left

Front heated oxygen sensor (Right

O2 SENSOR

Rear heated oxygen

(Right bank)

item

function

(Left bank)

function

tem

monitoring

bank)

sensor

(Left bank)

sensor

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

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

Test value

Test limit Application

X: Applicable

EXIT

EC-58

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EXIT

SRT item

O2 SENSOR

HEATER

EGR SYSTEM

Self-diagnostic test

item

Front heated oxygen sensor heater

(Left bank)

Front heated oxygen sensor heater

(Right bank)

Rear heated oxygen

sensor heater

(Left bank)

Rear heated oxygen

sensor heater

(Right bank)

EGR function

EGRC-BPT valve

function

Test value

TID CID

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

31H 8CH Min. X

32H 8CH Min. X

33H 8CH Min. X

34H 8CH Min. X

35H 0CH Max. X

36H 0CH Max. X

37H 8CH Min. X

Test limit Application

IDX

EC-59

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

(CONSULT-II screen terms)

NO DTC IS DETECTED, FURTHER TESTING MAY BE REQUIRED.

MAF SEN/CIRCUIT P0100 0102 — — X EC-124 ABSL PRES SEN/CIRC P0105 0803 — — X EC-132 AIR TEMP SEN/CIRC P0110 0401 — — X EC-140 COOLANT T SEN/CIRC P0115 0103 — — X EC-145 THRTL POS SEN/CIRC P0120 0403 — — X EC-150 *COOLAN T SEN/CIRC P0125 0908 — — X EC-161 FRONT O2 SENSOR-B1 P0130 0303 X X X*3 EC-166 FRONT O2 SENSOR-B1 P0131 0411 X X X*3 EC-174 FRONT O2 SENSOR-B1 P0132 0410 X X X*3 EC-180 FRONT O2 SENSOR-B1 P0133 0409 X X X*3 EC-187 FRONT O2 SENSOR-B1 P0134 0412 X X X*3 EC-196 FR O2 SE HEATER-B1 P0135 0901 X X X*3 EC-204 REAR O2 SENSOR-B1 P0137 0511 X X X*3 EC-210 REAR O2 SENSOR-B1 P0138 0510 X X X*3 EC-218 REAR O2 SENSOR-B1 P0139 0707 X X X*3 EC-226 REAR O2 SENSOR-B1 P0140 0512 X X X*3 EC-233 RR O2 SE HEATER-B1 P0141 0902 X X X*3 EC-239 FRONT O2 SENSOR-B2 P0150 0503 X X X*3 EC-204 FRONT O2 SENSOR-B2 P0151 0415 X X X*3 EC-174

FRONT O2 SENSOR-B2 P0152 0414 X X X*3 EC-180 FRONT O2 SENSOR-B2 P0153 0413 X X X*3 EC-187 FRONT O2 SENSOR-B2 P0154 0509 X X X*3 EC-196 FR O2 SE HEATER-B2 P0155 1001 X X X*3 EC-204 REAR O2 SENSOR-B2 P0157 0314 X X X*3 EC-210 REAR O2 SENSOR-B2 P0158 0313 X X X*3 EC-218 REAR O2 SENSOR-B2 P0159 0708 X X X*3 EC-226 REAR O2 SENSOR-B2 P0160 0315 X X X*3 EC-233 RR O2 SE HEATER-B2 P0161 1002 X X X*3 EC-239 FUEL SYS LEAN/BK1 P0171 0115 — — X EC-245 FUEL SYS RICH/BK1 P0172 0114 — — X EC-251 FUEL SYS LEAN/BK2 P0174 0210 — — X EC-245 FUEL SYS RICH/BK2 P0175 0209 — — X EC-251 FUEL TEMP SEN/CIRC P0180 0402 — — X EC-257 MULTI CYL MISFIRE P0300 0701 — — X EC-262 CYL 1 MISFIRE P0301 0608 — — X EC-262 CYL 2 MISFIRE P0302 0607 — — X EC-262

Items

CONSULT-II

GST*2

P0000 0505 ————

DTC*4

ECM*1

SRT code

Test value/

Test limit

(GST only)

1st trip DTC*4 Reference page

X: Applicable

—: Not applicable

EXIT

*1: In Diagnostic Test Mode II (Self-diagnostic results). These numbers are controlled by NISSAN. *2: These numbers are prescribed by SAE J2012. *3: These are not displayed with GST. *4: 1st trip DTC No. is the same as DTC No.

EC-60

ONBOARDDIAGNOSTICSYSTEMDESCRIPTION

Emission-relatedDiagnosticInformation (Cont’d)

(CONSULT-IIscreenterms)

CYL3MISFIRE P0303 0606 — — X EC-262 CYL4MISFIRE P0304 0605 — — X EC-262 CYL5MISFIRE P0305 0604 — — X EC-262 CYL6MISFIRE P0306 0603 — — X EC-262 CYL7MISFIRE P0307 0602 — — X EC-262 CYL8MISFIRE P0308 0601 — — X EC-262 KNOCKSEN/CIRC-B1 P0325 0304 — — X EC-267 KNOCKSEN/CIRC-B2 P0330 0212 — — X EC-267 CPS/CIRCUIT(OBD) P0335 0802 — — X EC-270 CAMPOSSEN/CIR P0340 0101 — — X EC-275 EGRSYSTEM P0400 0302 X X X*3 EC-281 EGRC-BPTVALVE P0402 0306 X X X*3 EC-290 TWCATALYSTSYS-B1 P0420 0702 X X X*3 EC-295 TWCATALYSTSYS-B2 P0430 0703 X X X*3 EC-295 EVAPSMALLLEAK P0440 0705 X X X*3 EC-298 PURGVOLUMECONT/V P0443 1008 — — X EC-309 VENTCONTROLVALVE P0446 0903 — — X EC-315 EVAPOSYSPRESSEN P0450 0704 — — X EC-320 EVAPGROSSLEAK P0455 0715 — X X*3 EC-326 VEHSPEEDSEN/CIRC P0500 0104 — — X EC-335 IACV/AACVLV/CIRC P0505 0205 — — X EC-340 CLOSEDTPSW/CIRC P0510 0203 — — X EC-346

A/TCOMMLINE P0600 0504 — — — EC-352 ECM P0605 0301 — — X EC-355 PNPSW/CIRC P0705 1101 — — X AT-81 ATFTEMPSEN/CIRC P0710 1208 — — X AT-85 VEHSPDSEN/CIRAT P0720 1102 — — X AT-89 ENGINESPEEDSIG P0725 1207 — — X AT-92 A/T1STGRFNCTN P0731 1103 — — X AT-95 A/T2NDGRFNCTN P0732 1104 — — X AT-100 A/T3RDGRFNCTN P0733 1105 — — X AT-104 A/T4THGRFNCTN P0734 1106 — — X AT-108 TCCSOLENOID/CIRC P0740 1204 — — X AT-114 A/TTCCS/VFNCTN P0744 1107 — — X AT-118 L/PRESSSOL/CIRC P0745 1205 — — X AT-125 SFTSOLA/CIRC P0750 1108 — — X AT-129 SFTSOLB/CIRC P0755 1201 — — X AT-133 MAP/BARSWSOL/CIR P1105 1302 — — X EC-358 INT/VTIMCONT-B1 P1110 0805 — — X EC-367

Items

CONSULT-II

GST*2

DTC*4

ECM*1

SRTcode

Testvalue/

Testlimit

(GSTonly)

1sttripDTC*4 Referencepage

X:Applicable

—:Notapplicable

IDX

EXIT

*1:InDiagnosticTestModeII(Self-diagnosticresults).ThesenumbersarecontrolledbyNISSAN. *2:ThesenumbersareprescribedbySAEJ2012. *3:ThesearenotdisplayedwithGST. *4:1sttripDTCNo.isthesameasDTCNo.

EC-61

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

(CONSULT-II screen terms)

TP SEN2/CIRCUIT P1120 0406 — — X EC-375 TANDEM TP SEN/CIRC P1125 0110 — — X EC-381 INT/V TIM CONT-B2 P1135 1301 — — X EC-367 INTK TIM S/CIRC-B1 P1140 1303 — — X EC-382 INTK TIM S/CIRC-B2 P1145 1304 — — X EC-382 CLOSED LOOP-B1 P1148 0307 — — X EC-388 CLOSED LOOP-B2 P1168 0308 — — X EC-388 TACM SW SIGNALS P1210 0106 — — X EC-390 FPCM/CIRCUIT P1220 1305 — — X EC-393 IGN SIGNAL-PRIMARY P1320 0201 — — X EC-399 CPS/CIRC (OBD) COG P1336 0905 — — X EC-407 EGRC SOLENOID/V P1400 1005 — — X EC-412 EGR TEMP SEN/CIRC P1401 0305 — — X EC-417 EGR SYSTEM P1402 0514 X X X*3 EC-423 EVAP SMALL LEAK P1440 0213 X X X EC-432 PURG VOLUME CONT/V P1444 0214 — — X EC-444 VENT CONTROL VALVE P1446 0215 — — X EC-452 EVAP PURG FLOW/MON P1447 0111 X X X*3 EC-457 VENT CONTROL VALVE P1448 0309 — — X EC-464 VC/V BYPASS/V P1490 0801 — — X EC-470 VC CUT/V BYPASS/V P1491 0311 — — X EC-475 PURG CONT/V S/V P1492 0807 — — X EC-481

PURG CONT/V & S/V P1493 0312 — — X EC-487 A/T DIAG COMM LINE P1605 0804 — — X EC-352 TP SEN/CIRC A/T P1705 1206 — — X AT-137 P-N POS SW/CIRCUIT P1706 1003 — — X EC-494 O/R CLTCH SOL/CIRC P1760 1203 — — X AT-143

Items

CONSULT-II

GST*2

DTC*4

ECM*1

SRT code

Test value/

Test limit

(GST only)

1st trip DTC*4 Reference page

X: Applicable

—: Not applicable

EXIT

EC-62

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

How to erase DTC (With CONSULT-II)

EXIT

Note: If the diagnostic trouble code is not for A/T related items (see EC-4), 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 5 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.] And touch “BACK” twice.

5. Touch “ENGINE”.

6. Touch “SELF-DIAG RESULTS”.

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 for both ECM and TCM (Transmission Control Module).

The emission-related diagnostic information can be erased by selecting “ERASE” in the “SELF-DIAG RESULTS” mode with CONSULT-II.

How to erase DTC (With GST)

Note: If the diagnostic trouble code is not for A/T related items (see page EC-4), skip step 2.

1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least 5 seconds and then turn it “ON” (engine stopped) again.

SEF966XA

IDX

EC-63

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

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).

How to erase DTC (No Tools)

Note: If the diagnostic trouble code is not for A/T related items (see EC-4), skip step 2.

1. If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least 5 seconds and then turn it “ON” again.

3. Change the diagnostic test mode from Mode II to Mode I by turning the mode selector on the ECM. (See EC-66.)

NOTE: I If the battery terminal is disconnected, the emission-related diagnostic information will be lost

within 24 hours.

I Erasing the emission-related diagnostic information, using CONSULT-II or GST is easier and

quicker than switching the mode selector on the ECM.

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

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.

EXIT

EC-64

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL)

The malfunction indicator lamp is located on the instrument panel.

1. The malfunction indicator lamp will light up when the ignition switch is turned ON without the engine running. This is a bulb check.

I If the malfunction indicator lamp does not light up, refer to EL

section WARNING LAMPS or see EC-535.

2. When the engine is started, the malfunction indicator lamp should go off. If the lamp remains on, the on board diagnostic system has

SEF217U

ON BOARD DIAGNOSTIC SYSTEM FUNCTION

The on board diagnostic system has the following four functions.

Diagnostic Test Mode I

1. BULB CHECK : This function checks the bulb for damage (blown, open circuit, etc.) of the malfunction indicator lamp. If the MIL does not come on, check MIL circuit and ECM test mode. (See next page.)

2. MALFUNCTION

WARNING

: This is a usual driving condition. When a malfunction is detected twice

in two consecutive driving cycles (2 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 “Misfire (possible three way catalyst damage)” I “Closed loop control” I Fail-safe mode

Diagnostic Test Mode II

detected an engine system malfunction.

EXIT

3. SELF-DIAGNOSTIC

: This function allows DTCs and 1st trip DTCs to be read.

RESULTS

4. FRONT HEATED OXY-

GEN SENSOR MONI-

: This function allows the fuel mixture condition (lean or rich), monitored

by front heated oxygen sensor, to be read.

TOR

MIL Flashing without DTC

If the ECM is in Diagnostic Test Mode II, the MIL may flash when the engine is running. In this case, check ECM test mode selector following “HOW TO SWITCH DIAGNOSTIC TEST MODES” on next page. How to switch the diagnostic test (function) modes and details of the above functions are described later. (See page EC-66.)

Ignition switch

in “ON” posi-

tion

Condition

Engine

stopped

Engine

running

Diagnostic

Test Mode I

BULB CHECK

MALFUNCTION

WARNING

Diagnostic

Test Mode II

SELF-DIAGNOSTIC

RESULTS

FRONT HEATED

OXYGEN SENSOR

MONITOR

IDX

EC-65

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

HOW TO SWITCH DIAGNOSTIC TEST MODES

Turn ignition switch “ON”. (Do not start engine.)

Mode I — MALFUNCTION INDICA

TOR LAMP CHECK. Refer to EC-65.

MIL should come on.

(Turn diagnostic test mode selector on ECM fully clockwise.)

MIL should come off.

Wait at least 2 seconds.

Check MIL circuit. (See

EC-535.)

Check whether ECM test

Yes

mode selector can be turned counterclockwise.

Start engine.

Check MIL circuit. (See EC-535.)

Check ECM fail-safe. (See EC-98.)

EXIT

Repair harness or connector

Repair or replace ECM test mode selector.

Diagnostic Test Mode I — MALFUNCTION WARNING

Repair harness or connectors.

Diagnostic Test Mode II*1

— FRONT HEATED OXYGEN SENSOR

MONITOR (Left bank)

Turn diagnostic test mode selector on ECM fully clockwise.

Wait at least 2 seconds.

(Turn diagnostic test mode selector fully counterclockwise.)

DIAGNOSTIC TEST MODE II

— SELF-DIAGNOSTIC RESULTS

(ERASING ECM MEMORY.)

Wait at least 2 seconds.

If the selector is turned fully counterclockwise at this time, the emission-related diagnostic information will be erased from the backup memory in the ECM.

Turn diagnostic test mode selector on ECM fully counterclockwise.

Diagnostic Test Mode II — FRONT HEATED OXYGEN SENSOR MONITOR (Right bank)

Start engine.

*1: If the battery is weak, front heated oxygen sensor monitor may not function

properly. Use this function after fully charging battery.

Turn diagnostic test mode selector on ECM fully clockwise.

Wait at least 2 seconds.

Turn diagnostic test mode selector on ECM fully counterclockwise.

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

I Switching the modes is not possible when the engine is

running.

I When ignition switch is turned off during diagnosis,

power to ECM will drop after approx. 5 seconds. The diagnosis will automatically return to Diagnostic Test Mode I.

I Turn back diagnostic test mode selector to the fully coun-

terclockwise position whenever vehicle is in use.

EC-66

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

DIAGNOSTIC TEST MODE I—BULB CHECK

In this mode, the MALFUNCTION INDICATOR LAMP on the instrument panel should stay ON. If it remains OFF, check the bulb. (See the WARNING LAMPS in the EL section. Or see EC-535.)

EXIT

DIAGNOSTIC TEST MODE I—MALFUNCTION WARNING

MALFUNCTION

INDICATOR LAMP

ON When the malfunction is detected or the ECM’s CPU is malfunctioning.

OFF No malfunction

I These Diagnostic Trouble Code Numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC

RESULTS).

Condition

DIAGNOSTIC TEST MODE II—SELF-DIAGNOSTIC RESULTS

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MALFUNCTION INDICATOR LAMP as shown below. The DTC and 1st trip DTC are displayed at the same time. If the MIL does not illuminate in diagnostic test mode 1 (Malfunction warning), all displayed items are 1st trip DTC’s. If only one code is displayed when the MIL illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are displayed, they may be either DTC’s or 1st trip DTC’s. DTC No. is same as that of 1st trip DTC. These unidentified codes can be identified by using the consult or GST. A DTC will be used as an example for how to read a code.

Long (0.6 second) blinking indicates the two LH digits of number and short (0.3 second) blinking indicates the two RH digits of number. For example, the malfunction indicator lamp blinks 10 times for 6 seconds (0.6 sec x 10 times) and then it blinks three times for about 1 second (0.3 sec x 3 times). This indicates the DTC “1003” and refers to the malfunction of the park/neutral position switch. In this way, all the detected malfunctions are classified by their diagnostic trouble code numbers. The DTC “0505” refers to no malfunction. (See DIAGNOSTIC TROUBLE CODE INDEX, refer to page EC-4.)

HOW TO ERASE DIAGNOSTIC TEST MODE II (Self-diagnostic results)

The diagnostic trouble code can be erased from the backup memory in the ECM when the diagnostic test mode is changed from Diagnostic Test Mode II to Diagnostic Test Mode I. (Refer to “HOW TO SWITCH DIAGNOSTIC TEST MODES”.)

I If the battery terminal is disconnected, the diagnostic trouble code will be lost from the backup

memory within 24 hours.

I Be careful not to erase the stored memory before starting trouble diagnoses.

SEF298Q

SEF162PA

IDX

EC-67

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

IAGNOSTIC TEST MODE II—FRONT HEATED OXYGEN SENSOR MONITOR

In this mode, the MALFUNCTION INDICATOR LAMP displays the condition of the fuel mixture (lean or rich) which is monitored by the front heated oxygen sensor.

EXIT

MALFUNCTION INDICATOR LAMP Fuel mixture condition in the exhaust gas

ON Lean

OFF Rich

*Remains ON or OFF Any condition Open loop control

*: Maintains conditions just before switching to open loop.

Air fuel ratio feedback control

condition

Closed loop control

To check the front heated oxygen sensor function, start engine in the Diagnostic Test Mode II and warm it up until engine coolant temperature indicator points to the middle of the gauge. Next run engine at about 2,000 rpm for about 2 minutes under no-load conditions. Then make sure that the MALFUNCTION INDICATOR LAMP comes ON more than 5 times every 10 seconds when measured at 2,000 rpm under no-load.

If the battery is weak, front heated oxygen sensor monitor may not function properly. Use this function after fully charging battery.

How to switch monitored sensor from left bank to right bank or vice versa

I The following procedure should be performed while the engine is running.

1. Turn diagnostic test mode selector on ECM fully clockwise.

2. Wait at least 2 seconds.

3. Turn diagnostic test mode selector on ECM fully counterclockwise.

SEF134M

EC-68

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

IVIS (Infiniti Vehicle Immobiliser System — NATS)

I If the security indicator lights up with the ignition switch

in the “ON” position or “NATS MALFUNCTION” is displayed on “SELF-DIAG RESULTS” screen, perform selfdiagnostic results mode with CONSULT-II using NATS program card. Refer to “IVIS (Infiniti Vehicle Immobiliser System — NATS” in EL section.

I Confirm no self-diagnostic results of NATS is displayed

before touching “ERASE” in “SELF-DIAG RESULTS” mode with CONSULT-II.

SEF543X

I When replacing ECM, initialization of NATS system and

registration of all NATS ignition 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 NATS initialization and NATS ignition key ID registration, refer to CONSULT-II operation manual, NATS.

EXIT

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-49.

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) 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-71. For details about patterns “A” and “B” under “Other”, see EC-71. *1: Clear timing is at the moment OK is detected. *2: Clear timing is when the same malfunction is detected in the 2nd trip.

80 (pattern C) 80 (pattern C) 40 (pattern A)

*1, *2 *1, *2 1 (pattern B)

EC-69

IDX

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”

EXIT

*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.)

SEF392S

*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 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 a time

(pattern C) without the same malfunction after DTC is stored in ECM.

EC-70

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 reset when the malfunction is detected once regardless of the driving pattern. I The B counter will count up times driving pattern B is satisfied without the malfunction. I The MIL will go off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)

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 a time without the same malfunction after DTC

is stored in ECM.

EXIT

IDX

EC-71

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”

EXIT

*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.)

SEF393S

*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: 1st trip DTC will be cleared after vehicle is driven a time

(pattern A) without the same malfunction.

*7: When the same malfunction is detected in the 2nd trip, the

1st trip freeze frame data will be cleared.

EC-72

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY DETERIORATION>”, “FUEL INJECTION SYSTEM”

EXIT

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

EC-73

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II

CONSULT-II INSPECTION PROCEDURE

1. Turn off ignition switch.

2. Connect “CONSULT-II” to data link connector which is located beside the hood lock release handle.

SEF046TA

3. Turn on ignition switch.

4. Touch “START”.

EXIT

PBR455D

5. Touch “ENGINE”.

PEF895K

6. Perform each diagnostic test mode according to each service procedure.

For further information, see the CONSULT-II Operation Manual.

SEF673X

EC-74

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

DIAGNOSTIC TEST MODE

SELF-DIAGNOSTIC

Item

Camshaft position sensor X X X Mass air flow sensor X X Engine coolant temperature sensor X X X X Front heated oxygen sensor X X X X Rear heated oxygen sensor X X X X Vehicle speed sensor X X X Throttle position sensor X X X Fuel tank temperature sensor X X X EVAP control system pressure sensor X X Absolute pressure sensor X X EGR temperature sensor X X

INPUT

ENGINE CONTROL COMPONENT PARTS

OUTPUT

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-51.

Intake air temperature sensor X X Crankshaft position sensor (OBD) X Knock sensor X Ignition switch (start signal) X Closed throttle position switch X Closed throttle position switch (throttle

position sensor signal) Air conditioner switch X Park/Neutral position switch X X Power steering oil pressure switch X Air conditioner switch X Battery voltage X Ambient air temperature switch X Injectors XX

Power transistor (Ignition timing)

IACV-AAC valve X X X X EVAP canister purge volume control valve X X X X Air conditioner relay X Fuel pump relay X X X EGRC-solenoid valve X X X Front heated oxygen sensor heater X X X Rear heated oxygen sensor heater X X X EVAP canister purge control solenoid valve X X X EVAP canister vent control valve X X X Vacuum cut valve bypass valve X X X X MAP/BARO switch solenoid valve X X X Calculated load value X X

WORK

SUP-

PORT

RESULTS*1

(Ignition

signal)

FREEZE

FRAME DATA*2

DATA

MONITOR

ACTIVE

TEST

SRT STA-

DTC & SRT

CONFIRMATION

DTC

TUS

WORK

SUPPORT

IDX

EXIT

EC-75

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

FUNCTION

Diagnostic test mode Function

Work support

Self-diagnostic results

Data monitor Input/Output data in the ECM can be read.

Active test

DTC & SRT confirmation

ECM part numbers ECM part numbers 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

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also shifts some parameters in a specified range.

The status of system monitoring tests and the selfdiagnosis status/result can be confirmed.

EXIT

WORK SUPPORT MODE

WORK ITEM CONDITION USAGE

IACV-AAC/V ADJ SET ENGINE SPEED AT THE SPECIFIED VALUE UNDER THE

FUEL PRESSURE RELEASE I FUEL PUMP WILL STOP BY TOUCHING “START” DURING

EVAP SYSTEM CLOSE OPEN THE VACUUM CUT VALVE BYPASS VALVE AND CLOSE

FOLLOWING CONDITIONS.

I ENGINE WARMED UP I NO-LOAD

IDLING. CRANK A FEW TIMES AFTER ENGINE STALLS.

THE EVAP CANISTER VENT CONTROL VALVE IN ORDER TO MAKE THE 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 SYSTEM

CLOSE”

When adjusting ignition timing and idle speed

When releasing fuel pressure from fuel line

When detecting EVAP vapor leak point of EVAP system

EC-76

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

SELF-DIAGNOSTIC MODE DTC and 1st trip DTC

Regarding items of “DTC and 1st trip DTC”, refer to “DIAGNOSTIC TROUBLE CODE INDEX” (See EC-4.).

Freeze frame data and 1st trip freeze frame data

Freeze frame data

item*1

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 TRM-B1 [%]

S-FUEL TRM-B2 [%] L-FUEL TRM-B1 [%] L-FUEL TRM-B2 [%]

ENGINE SPEED [rpm]

VEHICL SPEED [km/h] or [mph]

ABSOL PRESS [kPa] or [kg/cm

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 model Y33, “-B1” indicates left bank and “-B2” indicates right bank.

] or [psi]

I Engine control component part/control system has a trouble code, it is displayed as “PXXXX”. [Refer to

“Alphabetical & P No. Index for DTC (EC-4).]

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 heated 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.

I The vehicle speed at the moment a malfunction is detected is displayed.

I The absolute pressure 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

EXIT

EC-77

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

DATA MONITOR MODE

CONSULT-II (Cont’d)

EXIT

Monitored item [Unit]

CMPS⋅RPM (POS) [rpm]

MAS AIR/FL SE [V]

COOLAN TEMP/S [°C] or [°F]

FR O2 SEN-B1 [V]

FR O2 SEN-B2 [V]

RR O2 SEN-B1 [V]

RR O2 SEN-B2 [V]

FR O2 MNTR-B1 [RICH/LEAN]

FR O2 MNTR-B2 [RICH/LEAN]

RR O2 MNTR-B1 [RICH/LEAN]

RR O2 MNTR-B2 [RICH/LEAN]

VHCL SPEED SE [km/h] or [mph]

BATTERY VOLT [V]

THRTL POS SEN [V]

THRTL/P SEN2 [V]

FUEL T/TMP SE [°C] or [°F]

EGR TEMP SEN [V]

INT/A TEMP SE [°C] or [°F]

NOTE: Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically. Regarding Y33 model, “-B1” indicates left bank and “-B2” indicates right bank.

ECM input

signals

Main

signals

qq qq

qq q

qq qq qq q

q q q

Description Remarks

I Indicates the engine speed computed

from the POS signal (1° signal) of the crankshaft position sensor (POS).

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 front heated

oxygen sensor is displayed.

I The signal voltage of the rear heated

oxygen sensor is displayed.

I Display of front heated oxygen sensor

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 rear heated oxygen sensor

signal during air-fuel ratio feedback control: RICH ... means the amount of oxygen after three way catalyst is relatively large. LEAN ... means the amount of oxygen after three way catalyst is relatively small.

I The vehicle speed computed from the

vehicle speed sensor signal is displayed.

I The power supply voltage of ECM is dis-

played.

I The throttle position sensor signal volt-

age is displayed.

I Secondary throttle position sensor signal

voltage is displayed.

I The fuel tank temperature judged from

the tank fuel temperature sensor signal voltage is displayed.

I The signal voltage of the EGR tempera-

ture sensor is displayed.

I The intake air temperature determined by

the signal voltage of the intake air temperature sensor is 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.

EC-78

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

EXIT

Monitored item [Unit]

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]

LOAD SIGNAL [ON/OFF]

AMB TEMP SW [ON/OFF]

IGNITION SW [ON/OFF]

A/C PRESS SW [ON/OFF]

INJ PULSE-B1 [msec]

INJ PULSE-B2 [msec]

B/FUEL SCHDL [msec]

IGN TIMING [BTDC]

IACV-AAC/V [step]

PURG VOL C/V [step]

A/F ALPHA-B1 [%] I The mean value of the air-fuel ratio feedA/F ALPHA-B2 [%] EVAP SYS PRES [V] I The signal voltage of EVAP control sys-

ECM input

signals

Main

signals

qq qq

q q

Description Remarks

I Indicates [ON/OFF] condition from the

starter signal.

I Indicates mechanical contact [ON/OFF]

condition from the closed throttle position switch signal.

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 switch signal.

I [ON/OFF] condition of the power steering

oil pressure switch determined by the power steering oil pressure signal is indicated.

I Indicate [ON/OFF] condition from the

electrical load signal and/or lighting switch. ON ... rear defogger is operating. OFF ... rear defogger is not operating.

I Indicate [ON/OFF] condition from the

ambient temperature signal. ON ... When the ambient temperature is lower than specified value. OFF ... When the ambient temperature is higher than specified value.

I Indicates [ON/OFF] condition from igni-

tion switch.

I Indicate [ON/OFF] condition of air condi-

tioner pressure switch signal. ON ... A/C pressure is higher than specified value. OFF ... A/C pressure is lower than specified value.

I Indicates the actual fuel injection pulse

width compensated by ECM according to the input signals.

I “Base fuel schedule” indicates the fuel

injection pulse width programmed into ECM, prior to any learned on board correction.

I Indicates the ignition timing computed by

ECM according to the input signals.

I Indicates the IACV-AAC valve control

value computed by ECM according to the input signals.

I Indicates the EVAP canister purge vol-

ume control valve computed by the ECM according to the input signals.

I The opening becomes larger as the

value increases.

back correction factor per cycle is indicated.

tem pressure sensor is displayed.

I After starting the engine, [OFF] is dis-

played regardless of the starter signal.

I When the engine is stopped, a certain

computed value is indicated.

I When the engine is stopped, a certain

value is indicated.

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.

IDX

EC-79

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

EXIT

Monitored item [Unit]

AIR COND RLY [ON/OFF]

FUEL PUMP RLY [ON/OFF]

INT/V SOL-B1 INT/V SOL-B2 [ON/OFF]

INT/V TIM-B1 INT/V TIM-B2 [deg]

COOLING FAN [HI/OFF]

EGRC SOL/V [ON/OFF] (flow/cut)

VENT CONT/V [ON/OFF]

FR O2 HTR-B1 [ON/OFF]

FR O2 HTR-B2 [ON/OFF]

RR O2 HTR-B1

[ON/OFF] RR O2 HTR-B2

[ON/OFF] VC/V BYPASS/V

[ON/OFF]

PURG CONT S/V [ON/OFF]

CAL/LD VALUE [%] I “Calculated load value” indicates the

ABSOL TH⋅P/S [%] I “Absolute throttle position sensor” indi-

MASS AIRFLOW [g⋅m/s]

FPCM DR VOLT [V] I The voltage between fuel pump and

ECM input

signals

Main

signals

Description Remarks

I The air conditioner relay control condition

(determined by ECM according to the input signal) is indicated.

I Indicates the fuel pump relay control con-

dition determined by ECM according to the input signals.

I The control condition of the intake valve

timing control solenoid valve is indicated. ON ... Intake valve timing control is operating. OFF ... Intake valve timing control is not operating.

I Indicate [deg] of intake camshaft

advanced angle.

I The control condition of the cooling fan

(determined by ECM according to the input signal) is indicated. HI ... High speed operation OFF ... Stop

I The control condition of the EGRC-sole-

noid valve (determined by ECM according to the input signal) is indicated.

I OFF ... EGR is cut-off

ON ... EGR is operational

I The control condition of the EVAP canis-

ter vent control valve (determined by ECM according to the input signal) is indicated.

I ON ... Closed

OFF ... Open

I Indicates [ON/OFF] condition of front

heated oxygen sensor’s heater determined by ECM according to the input signals.

I Indicates [ON/OFF] condition of rear

heated oxygen sensor’s heater determined by ECM according to the input signals.

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 The control condition of the EVAP canis-

ter purge control solenoid valve (computed by the engine control module according to the input signals) is indicated.

I ON ... Canister purge is operational

OFF ... Canister purge operation is cutoff

value of the current airflow divided by peak airflow.

cates the throttle opening 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.

FPCM is displayed.

EC-80

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

EXIT

Monitored item [Unit]

FPCM [LOW/HI] I The control condition of the fuel pump

MAP/BARO SW/V [MAP/BARO]

ABSOL PRES/SE [V] I The signal voltage of the absolute pres-

VOLTAGE [V]

PULSE [msec] or [Hz] or [%]

ECM input

signals

Main

signals

Description Remarks

control module (FPCM) (determined by ECM according to the input signal) is indicated. LOW ... Low amount of fuel flow HI ... High amount of fuel flow

I The control condition of the MAP/BARO

switch solenoid valve (determined by ECM according to the input signal) is indicated. MAP ... Intake manifold absolute pressure BARO ... Barometric pressure

sure sensor is displayed.

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.

IDX

EC-81

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

ACTIVE TEST MODE

TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)

I Engine: Return to the original trouble

FUEL INJECTION

IACV-AAC/V OPENING

ENG COOLANT TEMP

IGNITION TIMING

POWER BALANCE

COOLING FAN

FUEL PUMP RELAY

EGRC SOLENOID VALVE

VALVE TIMING SOL

SELF-LEARNING CONT

PURG VOL CONT/V

FUEL/T TEMP SEN I Change the fuel tank temperature using CONSULT-II.

VENT CONT/V

VC/V BYPASS/V

PURG CONT S/V

MAP/BARO SW/V

FPCM

condition

I Change the amount of fuel injection

using CONSULT-II.

I Engine: After warming up, idle the

engine.

I Change the IACV-AAC valve opening

step using CONSULT-II.

I Engine: Return to the original trouble

condition

I Change the engine coolant

temperature 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.

I Ignition switch: ON I Turn solenoid valve “ON” and “OFF”

with CONSULT-II and listen to operating sound.

I Ignition switch: ON I Turn solenoid valve “ON” and “OFF”

with CONSULT-II and listen to operating sound.

I In this test, the coefficient of self-learning control mixture ratio returns to the original coefficient by touching “CLEAR” on the

screen.

I Engine: After warming up, run engine

at 1,500 rpm.

I Change the EVAP canister purge

volume control valve opening step using CONSULT-II.

I Ignition switch: ON (Engine stopped) I Turn the VENT CONT/V “ON and

OFF” with CONSULT-II and listen for operating sound.

I Ignition switch: ON (Engine stopped) I Turn the VC/V BYPASS/V “ON and

OFF” with CONSULT-II and listen for operating sound.

I Engine: Run engine at 2,000 rpm. I Turn the EVAP canister purge control

solenoid valve “ON” and “OFF” using CONSULT-II and listen for operating sound.

I Ignition switch: ON

(Engine stopped)

I Turn the MAP/BARO switch solenoid

valve between “MAP” and “BARO” using CONSULT-II and listen for operating sound.

I Ignition switch: ON I Select “LOW” and “HI” with

CONSULT-II and check that “FPCM D/R VOLT” of CONSULT-II changes.

If trouble symptom disappears, see CHECK ITEM.

Engine speed changes according to the opening percent.

If trouble symptom disappears, see CHECK ITEM.

Engine runs rough or dies.

Cooling fan moves and stops.

Fuel pump relay makes the operating sound.

Solenoid valve makes an operating sound.

Engine speed changes according to the opening step.

Solenoid valve makes an operating sound.

EVAP canister purge control solenoid valve makes an operating sound. Check vacuum signal for EVAP canister purge control valve. VC ON ... Vacuum exists. VC OFF ... Vacuum does not exist.

MAP/BARO switch solenoid valve makes an operating sound.

“FPCM D/R VOLT” of CONSULT-II changes as follows; LOW ... Approx. 4.7V HI ... Approx. 0.4V

I Harness and connector I Fuel injectors I Front heated oxygen sensor

I Harness and connector I IACV-AAC valve

I Harness and connector I Engine coolant temperature sensor I Fuel injectors

I Adjust ignition timing (by moving

camshaft position sensor)

I Harness and connector I Compression I Injectors I Ignition coil with power transistor I Spark plugs

I Harness and connector I Cooling fan motor

I Harness and connector I Fuel pump relay

I Harness and connector I EGRC-solenoid valve

I Harness and connector I Intake valve timing control solenoid

valve

I Harness and connector I EVAP canister purge volume control

valve

I Harness or connector I EVAP canister vent control valve

I Harness or connector I Vacuum cut bypass valve

I Harness and connector I EVAP canister purge control solenoid

valve

I Vacuum hose

I Harness and connector I MAP/BARO switch solenoid valve

I Harness and connector I FPCM

EXIT

EC-82

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

DTC & SRT CONFIRMATION MODE SRT STATUS mode

For details, refer to “SYSTEM READINESS TEST (SRT) CODE”, EC-51.

SRT Work Support Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

EXIT

DTC WORK SUPPORT mode

Test mode Test item Condition Reference page

PURGE FLOW P1447 VC CUT/V BP/V P1491 EC-475

EVAPORATIVE SYSTEM

FR O2 SENSOR

RR O2 SENSOR

EGR SYSTEM

PURG CN/V & S/V P1493 EC-488 PURG VOL CN/V P1444 EC-444 EVAP SML LEAK P0440 EC-298 EVAP SML LEAK P1440 EC-432 FR O2 SEN-B1 P0131 EC-174 FR O2 SEN-B1 P0132 EC-180 FR O2 SEN-B1 P0133 EC-187 FR O2 SEN-B1 P0130 EC-166 FR O2 SEN-B2 P0151 EC-174 FR O2 SEN-B2 P0152 EC-180 FR O2 SEN-B2 P0153 EC-187 FR O2 SEN-B2 P0150 EC-166 RR O2 SEN-B1 P0137 EC-210 RR O2 SEN-B1 P0138 EC-218 RR O2 SEN-B1 P0139 EC-226 RR O2 SEN-B2 P0157 EC-210 RR O2 SEN-B2 P0158 EC-218 RR O2 SEN-B2 P0159 EC-226 EGR SYSTEM P0400 EC-281 EGRC-BPT/VLV P0402 EC-290 EGR SYSTEM P1402 EC-423

Refer to corresponding trouble diagnosis for DTC.

EC-457

EC-83

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

SEF706X

SEF707X

CONSULT-II (Cont’d)

REAL TIME DIAGNOSIS IN DATA MONITOR MODE (Recording Vehicle Data)

CONSULT-II has two kinds of triggers and they can be selected by touching “SETTING” in “DATA MONITOR” mode.

1) “AUTO TRIG” (Automatic trigger):

I The malfunction will be identified on the CONSULT-II screen

inreal time. In other words, DTC/1st trip DTC and malfunction item will be displayed if the malfunction is detected by ECM. At the moment a malfunction is detected by ECM, “MONITOR” in “DATA MONITOR” screen is changed to “Recording Data ...xx%” as shown at left, and the data after the malfunction detection is recorded. Then when the percentage reached 100%, “REAL-TIME DIAG” screen is displayed. If “STOP” is touched on the screen during “ Recording Data ... xx%”, “REAL-TIME DIAG” screen is also displayed. The recording time after the malfunction detection and the recording speed can be changed by “TRIGGER POINT” and “Recording Speed”. Refer to CONSULT-II OPERATION MANUAL.

2) “MANU TRIG” (Manual trigger):

I DTC/1st trip DTC and malfunction item will not be displayed

automatically on CONSULT-II screen even though a malfunction is detected by ECM. DATA MONITOR can be performed continuously even though a malfunction is detected.

Use these triggers as follows:

1) “AUTO TRIG”

I While trying to detect the DTC/1st trip DTC by performing the

“DTC Confirmation Procedure”, be sure to select to “DATA MONITOR (AUTO TRIG)” mode. You can confirm the malfunction at the moment it is detected.

I While narrowing down the possible causes, CONSULT-II

should be set in “DATAMONITOR (AUTO TRIG)” mode, especially in case the incident is intermittent. When you are inspecting the circuit by gently shaking (or twisting) the suspicious connectors, components and harness in the “DTC Confirmation Procedure”, the moment a malfunction is found the DTC/1st trip DTC will be displayed. (Refer to GI Section, “Incident Simulation Tests”.)

2) “MANU TRIG”

I If the malfunction is displayed as soon as “DATA MONITOR”

is selected, reset CONSULT-II to “MANU TRIG”. By selecting “MANU TRIG” you can monitor and store the data. The data can be utilized for further diagnosis, such as a comparison with the value for the normal operating condition.

EXIT

EC-84

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

CONSULT-II (Cont’d)

EXIT

SEF139P

SEF720X

Generic Scan Tool (GST)

DESCRIPTION

Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has 8 different functions explained on the next page. ISO9141 is used as the protocol. The name “GST” or “Generic Scan Tool” is used in this service manual.

GST INSPECTION PROCEDURE

1. Turn off ignition switch.

2. Connect “GST” to data link connector which is located under LH dash panel near the hood lock release handle.

IDX

SEF046TA

EC-85

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Generic Scan Tool (GST) (Cont’d)

3. Turn ON ignition switch.

4. Enter the program according to instruction on the screen or in the operation manual.

(*: Regarding GST screens in this section, sample screens are shown.)

SEF398S

5. Perform each diagnostic mode according to each service procedure.

For further information, see the GST Operation Manual of the tool maker.

EXIT

FUNCTION

Diagnostic test mode Function

MODE 1 READINESS TESTS

MODE 2 (FREEZE DATA)

MODE 3 DTCs

MODE 4 CLEAR DIAG INFO

MODE 6 (ON BOARD TESTS)

MODE 7 (ON BOARD TESTS)

MODE 8 —

MODE 9 (CALIBRATION ID)

SEF416S

This mode gains access to current emission-related data values, including analog inputs and outputs, digital inputs and outputs, and system status information.

This mode gains access to emission-related data value which were stored by ECM during the freeze frame. [For details, refer to “Freeze Frame Data” (EC-77).]

This mode gains access to emission-related power train trouble codes which were stored by ECM.

This mode can clear all emission-related diagnostic information. This includes:

I Clear number of diagnostic trouble codes (MODE 1) I Clear diagnostic trouble codes (MODE 3) I Clear trouble code for freeze frame data (MODE 1) I Clear freeze frame data (MODE 2) I Reset status of system monitoring test (MODE 1) I Clear on board monitoring test results (MODE 6 and 7)

This mode accesses the results of on board diagnostic monitoring tests of specific components/systems that are not continuously monitored.

This mode enables the off board test drive to obtain test results for emission-related powertrain components/systems that are continuously monitored during normal driving conditions.

This mode can close EVAP system in ignition switch “ON” position (Engine stopped). When this mode is performed, the following parts can be opened or closed.

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

In the following conditions, this mode cannot function.

I Low ambient temperature I Low battery voltage I Engine running I Ignition switch “OFF” I Low fuel temperature I Too much pressure is applied to EVAP system

This mode enables the off-board test device to request specific vehicle information such as Vehicle Identification Number (VIN) and Calibration IDs.

EC-86

TROUBLE DIAGNOSIS — Introduction

Introduction

The engine has an ECM to control major systems such as fuel control, ignition control, idle air control system, etc. The ECM accepts input signals from sensors and instantly drives actuators. It is essential that both input and output signals are proper and stable. At the same time, it is important that there are no problems such as vacuum leaks, fouled spark plugs, or other problems with the engine. It is much more difficult to diagnose a problem that occurs intermittently rather than continuously. Most intermittent problems are

MEF036D

SEF233G

caused by poor electric connections or improper wiring. In this case, careful checking of suspected circuits may help prevent the replacement of good parts. A visual check only may not find the cause of the problems. A road test with CONSULT-II (or GST) or a circuit tester connected should be performed. Follow the “Work Flow” on EC-89. Before undertaking actual checks, take just a few minutes to talk with a customer who approaches with a driveability complaint. The customer can supply good information about such problems, especially intermittent ones. Find out what symptoms are present and under what conditions they occur.A“Diagnostic Worksheet” like the example below should be used. Start your diagnosis by looking for “conventional” problems first. This will help troubleshoot driveability problems on an electronically controlled engine vehicle.

EXIT

SEF234G

SEF907L

Diagnostic Worksheet

There are many operating conditions that lead to the malfunctions of engine components. A good knowledge of such conditions can make troubleshooting faster and more accurate. In general, each customer may feel differently about a given problem. It is important to fully understand the symptoms or conditions for a customer complaint. Utilize a diagnostic worksheet like the one shown below in order to organize all the information for troubleshooting. Some conditions may cause the malfunction indicator lamp to come on steady or blink and DTC to be detected. Examples:

I Vehicle ran out of fuel, which caused engine misfire. I Fuel filler cap was left off or incorrectly screwed on, allowing

fuel to evaporate into the atmosphere [for models with EVAP (SMALL LEAK)] diagnosis.

IDX

EC-87

TROUBLE DIAGNOSIS — Introduction

Diagnostic Worksheet (Cont’d)

WORKSHEET SAMPLE

Customer name MR/MS Model & Year VIN Engine # Trans. Mileage Incident Date Manuf. Date In Service Date

Fuel and fuel filler cap

l Startability

l Idling

Symptoms

l Driveability

l Engine stall

Incident occurrence

Frequency l All the time l Under certain conditions l Sometimes Weather conditions l Not affected

Weather l Fine l Raining l Snowing l Others [ ] Temperature l Hot l Warm l Cool l Cold l Humid °F

l Vehicle ran out of fuel causing misfire. l Fuel filler cap was left off or incorrectly screwed on.

l Impossible to start l No combustion l Partial combustion

l Partial combustion affected by throttle position l Partial combustion NOT affected by throttle position

l Possible but hard to start l Others [ ] l No fast idle l Unstable l High idle l Low idle

l Others [ ] l Stumble l Surge l Knock l Lack of power

l Intake backfire l Exhaust backfire l Others [ ]

l At the time of start l While idling l While accelerating l While decelerating l Just after stopping l While loading

l Just after delivery l Recently l In the morning l At night l In the daytime

l Cold l During warm-up l After warm-up

EXIT

Engine conditions

Road conditions l In town l In suburbs l Highway l Off road (up/down)

Driving conditions

Malfunction indicator lamp l Turned on l Not turned on

Engine speed

l Not affected l At starting l While idling l At racing l While accelerating l While cruising l While decelerating l While turning (RH/LH)

Vehicle speed

EC-88

TROUBLE DIAGNOSIS — Work Flow

Work Flow

CHECK IN

CHECK INCIDENT CONDITIONS.

Listen to customer complaints. (Get symptoms.)

.................................................

STEP I

EXIT

CHECK DTC and FREEZE FRAME DATA.

Check and PRINT OUT (write down), (1st trip) Diagnostic Trouble Code (DTC) and Freeze Frame Data (Pre-check). Then clear. Paste it in repair order sheet. If DTC is not available even if MIL lights up, check ECM fail-safe. (Refer to EC-98.) Also check related service bulletins for information.

Symptoms collected No symptoms, except MIL

Verify the symptom by driving in the condition the customer described.

Normal Code (at STEP II)

INCIDENT INFORMATION

Verify the (1st trip) DTC by performing the “DTC CONFIRMATION PROCEDURE”.

Choose the appropriate action.

Malfunction Code (at STEP II or IV) Normal Code (at both STEP II and IV)

...............................................................

TROUBLE DIAGNOSIS FOR DTC PXXXX.

FINAL CHECK

Confirm that the incident is completely fixed by performing BASIC INSPECTION and DTC CONFIRMATION PROCEDURE (or OVERALL FUNCTION CHECK). Then, erase the unnecessary (already fixed) DTCs in ECM and TCM (Transmission Control Module).

If completion of SRT is needed, drive the vehicle under the specific pattern. Refer to EC-56.

Malfunction Code (at STEP II)

Perform inspections according to Symptom Matrix Chart.

REPAIR/REPLACE

CHECK OUT

lights up, or (1st trip) DTC exists at STEP II.

.............................................................................................

BASIC INSPECTION

SYMPTOM BASIS (at STEP I or III)

*4 STEP VI

...........................................

STEP II

STEP III

STEP IV

STEP V

STEP VII

*1: If the incident cannot be duplicated, see “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117. *2: If the on board diagnostic system cannot be performed, check main power supply and ground circuit (See TROUBLE

DIAGNOSIS FOR POWER SUPPLY, EC-118).

*3: If time data of “SELF-DIAG RESULTS” is other than “0” or “1t” refer to “TROUBLE DIAGNOSIS FOR

INTERMITTENT”, EC-117.

*4: If the malfunction part cannot be found, refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-117.

EC-89

IDX

STEP DESCRIPTION

STEP I

STEP II

STEP III

STEP IV

STEP V

STEP VI

STEP VII

Get detailed information about the conditions and the environment when the incident/symptom occurred using the “DIAGNOSTIC WORK SHEET”, EC-87.

Before confirming the concern, check and write down (print out using CONSULT-II or Generic Scan Tool) the Diagnostic Trouble Code (DTC) and the (1st trip) freeze frame data, then erase the code and the data. (Refer to EC-63.) The (1st trip) DTC and the (1st trip) freeze frame data can be used when duplicating the incident at STEP III&IV. Study the relationship between the cause, specified by (1st trip) DTC, and the symptom described by the customer. (The “Symptom Matrix Chart” will be useful. See page EC-99.) Also check related service bulletins for information.

Try to confirm the symptom and under what conditions the incident occurs. The “DIAGNOSTIC WORK SHEET” and the freeze frame data are useful to verify the incident. Connect CONSULT-II to the vehicle in DATAMONITOR (AUTO TRIG) mode and check real time diagnosis results. If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. (Refer to GI section.) If the malfunction code is detected, skip STEP IV and perform STEP V.

Try to detect the (1st trip) Diagnostic Trouble Code by driving in (or performing) the “DTC CONFIRMATION PROCEDURE”. Check and read the (1st trip) DTC and (1st trip) freeze frame data by using CONSULT-II or Generic Scan Tool. During the (1st trip) DTC verification, be sure to connect CONSULT-II to the vehicle in DATA MONITOR (AUTO TRIG) mode and check real time diagnosis results. If the incident cannot be verified, perform INCIDENT SIMULATION TESTS. (Refer to GI section.) In case the “DTC CONFIRMATION PROCEDURE” is not available, perform the “OVERALL FUNCTION CHECK” instead. The (1st trip) DTC cannot be displayed by this check, however, this simplified “check” is an effective alternative. The “NG” result of the “OVERALL FUNCTION CHECK” is the same as the (1st trip) DTC detection.

Take the appropriate action based on the results of STEP I through IV. If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC PXXXX. If the normal code is indicated, proceed to the BASIC INSPECTION on next page. Then perform inspections according to the Symptom Matrix Chart. (Refer to EC-99.)

Identify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect the system for mechanical binding, loose connectors or wiring damage using (tracing) “Harness Layouts”. Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR (AUTO TRIG)” mode. Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CONSULT-II. Refer to EC-102. The “DIAGNOSTIC PROCEDURE” in EC section contains a description based on open circuit inspection. A short circuit inspection is also required for the circuit check in the DIAGNOSTIC PROCEDURE. For details, refer to GI section (“HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”, “Circuit Inspection”). Repair or replace the malfunction parts.

Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions and circumstances which resulted in the customer’s initial complaint. Perform the “DTC CONFIRMATION PROCEDURE” and confirm the normal code (Diagnostic trouble code No. P0000 or 0505) is detected. If the incident is still detected in the final check, perform STEP VI by using a different method from the previous one. Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) (1st trip) DTC in ECM and TCM (Transmission Control Module). (Refer to EC-63.)

TROUBLE DIAGNOSIS — Work Flow

Description for Work Flow

EXIT

EC-90

TROUBLE DIAGNOSIS — Basic Inspection

Basic Inspection

Precaution: Perform Basic Inspection without electrical or mechanical loads applied;

I Headlamp switch is OFF, I Air conditioner switch is OFF, I Rear window defogger switch is OFF, I Steering wheel is in the straight-ahead position, etc.

EXIT

SEF142I

SEF046TA

SEF960X

BEFORE STARTING

1. Check service records for recent repairs of related problems, or the current need for scheduled maintenance.

2. Open engine hood and check the following:

I Harness connectors for improper con-

nections

I Vacuum hoses for splits, kinks, or

improper connections

I Wiring for improper connections,

pinches, or cuts

CONNECT CONSULT-II TO THE VEHICLE.

Connect “CONSULT-II” to the data link connector and select “ENGINE” from the menu. (Refer to page EC-74.)

THROTTLE OPENER INSPECTION

1. Start engine and let it idle.

2. Confirm the throttle drum becomes free from the rod of the throttle opener.

Refer to “INSPECTION”,

“Throttle Opener”, EC-39.

SEF219U

CHECK FI CAM.

Warm up engine to normal operating temperature and make sure there is clearance between FI cam and roller (pin).

(Go to next page.)

EC-91

Check FI cam, refer to

EC-40.

IDX

TROUBLE DIAGNOSIS — Basic Inspection

Basic Inspection (Cont’d)

EXIT

SEF263Y

SEF212U

SEF043T

CHECK IGNITION TIMING.

1. Warm up engine to normal operating temperature.

2. Select “IACV-AAC/V ADJ” in “WORK SUPPORT” mode.

3. Touch “START”.

4. Check ignition timing at idle using timing light.

Ignition timing:

15°±2° BTDC

--------------------------------------------------------------------------------------------------------------------------------------OR--------------------------------------------------------------------------------------------------------------------------------------

1. Warm up engine to normal operating temperature.

2. Stop engine and disconnect throttle position sensor harness connector.

3. Start engine.

4. Check ignition timing at idle using timing light.

Ignition timing:

15°±2° BTDC

CHECK BASE IDLE SPEED.

1. Select “IACV-AAC/V ADJ” in

“WORK SUPPORT” mode.

2. When touching “START”, does

engine speed fall to

600±50 rpm (in “P” or “N” position)?

Adjust ignition timing by

turning camshaft position sensor. Refer to EC-42.

Adjust base idle speed by

turning idle speed adjusting screw. Refer to “Idle Speed/ Ignition Timing/Idle Mixture Ratio Adjustment” in EC-42.

SEF263Y

SEF115T

(Go to next page.)

EC-92

TROUBLE DIAGNOSIS — Basic Inspection

Basic Inspection (Cont’d)

EXIT

SEF793W

SEF397X

SEF402W

SEF800W

CHECK CLOSED THROTTLE POSITION SWITCH IDLE POSITION. (Check throttle position sensor idle position.) I Always check ignition timing and base idle

speed before performing the followings.

1. Warm up engine to normal operating temperature.

2. Check FI cam, refer to procedure

3. Stop engine.

4. Remove the vacuum hose connected to the throttle opener.

5. Connect suitable vacuum hose to the vacuum pump and the throttle opener as shown in the figure.

6. Apply vacuum [more than −40.0 kPa (−300 mmHg, −11.81 inHg)] until the throttle drum become free from the rod of the throttle opener. During the TPS adjustment, the vacuum should be applied (Until step

7. Turn ignition switch “ON”.

8. Select “DATAMONITOR” mode with CONSULT-II.

9. Select “CLSD THL/P SW” from the menu.

10. Read “CLSD THL/P SW” signal

I Insert a 0.2 mm (0.008 in) and 0.3 mm (0.012

in) feeler gauge alternately between the throttle adjust screw (TAS) and throttle drum as shown in the figure and check the signal.

“CLSD THL/P SW” signal should remain “ON” while inserting 0.2 mm (0.008 in) feeler gauge. “CLSD THL/P SW” signal should remain “OFF” while inserting 0.3 mm (0.012 in) feeler gauge.

----------------------------------------------------------------------------------------------------------------------------------------OR----------------------------------------------------------------------------------------------------------------------------------------

I Insert the 0.2 mm (0.008 in) and 0.3 mm

(0.012 in) feeler gauge alternately between the throttle adjust screw (TAS) and throttle drum as shown in the figure and check continuity.

“Continuity should exist” while inserting 0.2 mm (0.008 in) feeler gauge. “Continuity should not exist” while inserting

0.3 mm (0.012 in) feeler gauge.

under the following conditions.

7. Disconnect closed throttle position

switch harness connector.

8. Connect the tester probe to closed throttle position switch terminals

and

8 .

9. Check harness continuity under the following conditions.

I Reconnect throttle position sensor

harness connector and closed throttle position switch harness connector.

I Rev engine (2,000 to 3,000 rpm) 2 or

3 times under no-load and then run engine at idle speed.

ADJUSTMENT

Refer to “THROTTLE POSITION SENSOR IDLE POSITION ADJUSTMENT”. Go to EC-95.

IDX

(Go to next page.)

EC-93

TROUBLE DIAGNOSIS — Basic Inspection

Basic Inspection (Cont’d)

RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY. Note: Always warm up engine to normal

operating temperature. If engine is cool, the throttle position sensor idle position memory will not be reset correctly.

1. Start engine.

SEF864V

SEF395X

2. Warm up engine to normal operating temperature.

3. Select “CLSD THL POS” in “DATA MONITOR” mode (Manual trigger) with CONSULT-II.

4. Stop engine. (Turn ignition switch “OFF”.)

5. Turn ignition switch “ON” and wait at least 5 seconds.

6. Turn ignition switch “OFF” and wait at least 5 seconds.

7. Repeat steps 5 and 6 until “CLSD THL POS” in “DATAMONITOR” mode with CONSULT-II changes to “ON”.

7. Repeat steps 5 and 6, 20 times.

EXIT

SEF396X

Stop engine, release vacuum then remove the vacuum hose and handy vacuum pump from the throttle opener. Reinstall the original vacuum hose to the throttle opener securely.

CHECK TARGET IDLE SPEED.

Read the engine idle speed in “DATA MONITOR” mode with CONSULT-II.

650±50 rpm (in “P” or “N” position)

After this inspection, unnecessary diagnostic trouble code No. might be displayed. I Erase the stored memory in ECM

and TCM (Transmission Control Module). Refer to “ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION” (EC-63) and “HOW TO ERASE DTC” in AT section.

I Erase the store memory in ABS/TCS

control unit. Refer to “TROUBLE DIAGNOSIS FOR ABS/TCS C/U SIGNAL”, EC-499 or refer to (“TROUBLE DIAGNOSIS”, HOW TO ERASE SELF-DIAGNOSTIC RESULTS”) in BR section.

Adjust idle speed. Refer to

“Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment” in EC-42.

INSPECTION END

EC-94

TROUBLE DIAGNOSIS — Basic Inspection

Basic Inspection (Cont’d)

THROTTLE POSITION SENSOR IDLE POSITION ADJUSTMENT Note:

I Never adjust throttle adjust screw (TAS). I Do not touch throttle drum when checking “CLSD THL/P

SW” signal or “continuity”, doing so may cause an incorrect adjustment.

1. Warm engine up to normal operating temperature.

2. Check FI cam. Refer to procedure

3. Stop engine.

SEF246F

SEF793W

SEF402W

SEF397X

Note: If handy vacuum pump is a already set, go to step 7.

4. Remove the vacuum hose connected to the throttle opener.

5. Connect suitable vacuum hose to the vacuum pump and the

throttle opener as shown in the figure.

6. Apply vacuum [more than −40.0 kPa (−300 mmHg, −11.81

inHg)] until the throttle drum become free from the rod of the throttle opener. During the TPS adjustment the vacuum should be applied.

7. Loosen throttle position sensor fixing bolts.

8. Turn ignition switch “ON”.

9. Select “DATA MONITOR” mode with CONSULT-II.

10. Select “CLSD THL/P SW” from the menu.

11. Read “CLSD THL/P SW” signal under the following conditions.

I Insert 0.2 mm (0.008 in) feeler gauge between throttle

adjust screw and throttle drum as shown in the figure and check the following.

I Open throttle valve and then close. I “CLSD THL/P SW” signal should remain “OFF”

when the throttle valve is closed. (If signal is “ON”, turn throttle position sensor body counterclockwise until the signal switches to “OFF”.)

12. Temporarily tighten sensor body fixing bolts as follows.

I Gradually move the sensor body clockwise and

stop it when “CLSD THL/P SW” signal switches from “OFF” to “ON”, then tighten sensor body fixing bolts.

13. Make sure the signal is “ON” when the throttle valve is closed and “OFF” when it is opened. Repeat it 2 or 3 times.

14. Remove 0.2 mm (0.008 in) feeler gauge then insert 0.3 mm (0.012 in) feeler gauge and check the following. Make sure the signal remains “OFF” when the throttle valve is closed. Repeat it 2 or 3 times.

15. Tighten throttle position sensor. Check that the “CLOSED THL/SW” signal remains “OFF” while closing throttle valve. If NG, repeat from the step 4.

After this adjustment, go to procedure THROTTLE POSITION SENSOR IDLE POSITION MEMORY.

8. Disconnect closed throttle position sensor harness connector.

9. Connect tester prove to the closed throttle position switch terminals the following conditions.

6 andq8 and check continuity under

EXIT

RESET

IDX

SEF398X

EC-95

TROUBLE DIAGNOSIS — Basic Inspection

Basic Inspection (Cont’d)

I Insert the 0.2 mm (0.008 in) feeler gauge between the

throttle adjust screw and throttle drum as shown in the figure and check the following.

I Open throttle valve then close. I The continuity should not exist while closing the

throttle valve. If the continuity exists, turn throttle position sensor body counterclockwise until the continuity does not exist.

10. Temporarily tighten sensor body fixing bolts as follows.

I Gradually move the sensor body clockwise and

SEF403W

SEF300T

stop it when the continuity comes to exist, then tighten sensor body fixing bolts.

11. Make sure the continuity exists when the throttle valve is closed and continuity does not exist when it is opened. Repeat it 2 or 3 times.

12. Remove 0.2 mm (0.008 in) feeler gauge then insert 0.3 mm (0.012 in) feeler gauge and check the following. Make sure the continuity does not exist when the throttle valve is closed. Repeat it 2 or 3 times.

13. Tighten throttle position sensor. Check that the continuity does not exist while closing the throttle valve. If NG, repeat from the step 5.

After this adjustment, go to procedure THROTTLE POSITION SENSOR IDLE POSITION MEMORY.

RESET

EXIT

EC-96

TROUBLE DIAGNOSIS — General Description

Diagnostic Trouble Code (DTC) Inspection Priority Chart

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority chart.

Priority Detected items (DTC)

1 I ECM (P0605, 0301) I Vehicle speed sensor

I Mass air flow sensor

(P0100, 0102)

I Throttle position sensor (P0120,

0403)

I EGRC-solenoid (P1400, 1005) I Crankshaft position sensor (OBD)

I A/T communication line (P0600,

0504), (P1605, 0804)

2 I EGR temperature sensor (P1401,

0305)

I A/T related sensors, solenoid

valves and switches (P0705 P0725, 1101 - 1208) (P0740, 1108

- 1206)

I Absolute pressure sensor (P0105,

0803)

I MAP/BARO switch solenoid valve

(P1105, 1302)

3 I EGR function (P0400, 0302)

I Tandem throttle position sensor

(P1125, 0110)

I Secondary throttle position sensor

(P1120, 0406)

(P1402, 0514)

I EVAP control system (SMALL

LEAK) (P0440, 0705) (P1440,

0213) (GROSS LEAK) (P0455,

0715)

I EGRC-BPT valve function

(P0402, 0306)

I IACV-AAC valve

(P0505, 0205)

(P0500, 0104)

I Intake air temperature sensor

(P0110, 0401)

I Knock sensor (P0325, 0304),

(P0330, 0212)

circuit (P0335, 0802) (P1336,

0905)

I Tank fuel temperature sensor

(P0180, 0402)

I Rear heated oxygen sensor

(P0137 - P0140) (0150 - 0152,

0707), (P0157 - P0160) (0313 0315, 0708)

I Front heated oxygen sensor’s

heater (P0135, 0901) (P0155,

1001)

I Closed throttle position switch

(P0510, 0203)

I Intake valve timing control position

sensor circuit (P1140, 1303), (P1145, 1304)

I Front heated oxygen sensor

(P0130 - P0134, 0303, 0409 -

0412) (P0150 - P0154, 0413 0415, 0503, 0509)

I Rear heated oxygen sensors

heater (P0141, 0902), (P0161,

1002)

I TCS signal (P1210, 0106) I Fuel pump control module (FPCM)

I Misfire (P0300 - P0308, 0701 -

0601)

I Closed loop control

(P1148, 0307) (P1168, 0308)

I A/T function (P0731 - P0734, 1103

- 1106) (P0744, 1107)

I Engine coolant temperature sensor

(P0115, 0103) (P0125, 0908)

I Ignition signal circuit (P1320, 0201)

I Park/Neutral position switch

(P1706, 1003)

I Camshaft position sensor (P0340,

0101)

I EVAP control system pressure

sensor (P0450, 0704)

I Vacuum cut valve bypass valve

(P1491, 0311) (P1490, 0807)

I EVAP canister vent control valve

(P0446, 0903) (P1446, 0215) (P1448, 0309)

I EVAP canister purge volume con-

trol valve (P1444, 0214) (P0443,

1008)

I EVAP control system purge flow

monitoring (P1447, 0111)

I EVAP canister purge control valve/

solenoid valve (P1493, 0312), (P1492, 0807)

(P1220, 1305)

I Fuel injection system function

(P0172, 0114), (P0171, 0115), (P0175, 0209), (P0174, 0210)

I Three way catalyst function

(P0420, 0702) (P0430, 0703)

I Intake valve timing control function

(P1110, 0805), (P1135, 1301)

IDX

EXIT

EC-97

TROUBLE DIAGNOSIS — General Description

Fail-Safe Chart

The ECM enters fail-safe mode, if any of the following malfunctions are detected due to the open or short circuit. When the ECM enters the fail-safe mode, the MIL illuminates.

DTC No.

CONSULT-II

GST

P0100 0102 Mass air flow sensor cir-

P0115 0103 Engine coolant tempera-

ECM*

Detected items Engine operating condition in fail-safe mode

cuit

ture sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel cut.

Engine coolant temperature will be determined by ECM based on the time after turning ignition switch “ON” or “START”. CONSULT-II displays the engine coolant temperature decided by ECM.

EXIT

P0120 0403 Throttle position sensor

P1210 0106 TCS signal circuit TCS does not operate.

Unable to

access ECM

Unable to

access Diag-

nostic Test

Mode II

Condition

Just as ignition switch is turned ON or Start

More than 4 minutes after ignition Start 80°C (176°F)

Except as shown above

circuit

ECM ECM fail-safe activating condition

Throttle position will be determined based on the amount of mass air flow and the engine speed. Therefore, acceleration will be poor.

When engine is idling Normal When accelerating Poor acceleration

For details, refer to BR section (“TROUBLE DIAGNOSIS FOR TCS”).

The computing function of the ECM was judged to be malfunctioning. When the fail-safe system activates, i.e. if the ECM detects a malfunction condition in the CPU of ECM, the MALFUNCTION INDICATOR LAMP on the instrument panel lights to warn the driver. However, it is not possible to access ECM and DTC cannot be confirmed.

Engine control with ECM fail-safe

When the fail-safe system is operating, fuel injection, ignition timing, fuel pump operation, IACV-AAC valve operation and cooling fan operation are controlled under certain limitations.

Engine coolant temperature decided

(CONSULT-II display)

40°C (104°F)

40 - 80°C (104 - 176°F)

(Depends on the time)

Driving condition

*: In Diagnostic Test Mode II (Self-diagnostic results)

ECM fail-safe operation

Engine speed Engine speed will not rise more than 3,000 rpm.

Fuel injection Simultaneous multiport fuel injection system Ignition timing Ignition timing is fixed at the preset value.

Fuel pump

Cooling fans

Replace ECM, if ECM fail-safe condition is confirmed.

Fuel pump relay is “ON” when engine is running and

“OFF” when engine stalls.

Cooling fan relay “ON” (High speed condition) when

engine is running, and “OFF” when engine stalls.

EC-98

TROUBLE DIAGNOSIS — General Description

Symptom Matrix Chart

SYMPTOM

EXIT

SYSTEM — Basic engine control system

HARD/NO START/RESTART (EXCP. HA)

ENGINE STALL

HESITATION/SURGING/FLAT SPOT

SPARK KNOCK/DETONATION

LACK OF POWER/POOR ACCELERATION

HIGH IDLE/LOW IDLE

ROUGH IDLE/HUNTING

IDLING VIBRATION

SLOW/NO RETURN TO IDLE

OVERHEATS/WATER TEMPERATURE HIGH

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

OVERCOOLS Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM 1P 1X HA Fuel Fuel pump circuit 11232 33 3 2EC-523

Fuel pressure regulator system 234444444 4 EC-37 Injector circuit 11222222 2 EC-515 Evaporative emission system 334444444 4 EC-26

Air Positive crankcase ventilation system 334444444 41 EC-36

Incorrect idle speed adjustment 3 3 1111 1 EC-42 IACV-AAC valve circuit 112222222 2 EC-340 IACV-FICD solenoid circuit 3 2332 EC-527

Ignition Incorrect ignition timing adjustment 33111 11 1 EC-42

Ignition circuit 11232 23 2 EC-399

EGR EGRC-solenoid valve 23333 3 3 EC-412

EGR system 212333233 3 EC-423 Main power supply and ground circuit 23333 22 33 3EC-118 Cooling Cooling fan circuit 33333333312 1 3EC-503 Air conditioner circuit 333333333 3 3HAsection

1 - 6: The numbers refer to the order of inspection.

Reference page

OVERCHARGING

BATTERY DEAD (UNDER CHARGE)

IDX

EC-99

TROUBLE DIAGNOSIS — General Description

Symptom Matrix Chart (Cont’d)

SYMPTOM

SYSTEM — Engine control system

HARD/NO START/RESTART (EXCP. HA)

ENGINE STALL

HESITATION/SURGING/FLAT SPOT

SPARK KNOCK/DETONATION

LACK OF POWER/POOR ACCELERATION

HIGH IDLE/LOW IDLE

ROUGH IDLE/HUNTING

IDLING VIBRATION

SLOW/NO RETURN TO IDLE

OVERHEATS/WATER TEMPERATURE HIGH

EXCESSIVE FUEL CONSUMPTION

EXCESSIVE OIL CONSUMPTION

OVERCOOLS

OVERCHARGING Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM 1P 1X HA Engine con-

trol

1 - 6: The numbers refer to the order of inspection.

Camshaft position sensor circuit 22222333 EC-275 Mass air flow sensor circuit 112322222 2 EC-124 Front heated oxygen sensor circuit 21232 23 2 EC-196, 166 Engine coolant temperature sensor circuit 11333323323 EC-145, 161 Throttle position sensor circuit 1 2 23223 2 EC-150 Incorrect throttle position sensor adjust-

ment Intake valve timing control system 3 3 3 3 3 EC-367, 382 Vehicle speed sensor circuit 3 3 3 3 EC-335 Knock sensor circuit 2322232 3 EC-267 ECM 33333333333 EC-355, 98 Start signal circuit 2 EC-521 Park/Neutral position switch circuit 3 3 3 3 3 EC-494 FPCM 2 2 2 2 2 EC-393 Power steering oil pressure switch circuit 2 3 3 EC-527

23 31331 3 EC-91

Reference page

BATTERY DEAD (UNDER CHARGE)

EXIT

EC-100

Infiniti Q45 FY33 (2000) Service Manual – ENGINE CONTROL SYSTEM

Specifications and Main Features

Frequently Asked Questions

User Manual

DIAGNOSTICTROUBLECODEINDEX

Alphabetical&PNo.IndexforDTC

PRECAUTIONS AND PREPARATION

Special Service Tool

Commercial Service Tools

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

Engine Fuel & Emission Control System

Precautions

ENGINE AND EMISSION CONTROL OVERALL SYSTEM

Circuit Diagram

System Diagram

Engine Control Component Parts Location

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

Description

Inspection

Evaporative Emission Line Drawing

On Board Refueling Vapor Recovery (ORVR)

POSITIVE CRANKCASE VENTILATION

Description

Inspection

BASIC SERVICE PROCEDURE

Fuel Pressure Release

Fuel Pressure Check

Injector Removal and Installation

Throttle Opener

Fast Idle Cam (FIC) Inspection and Adjustment

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Introduction

Two Trip Detection Logic

Emission-related Diagnostic Information

Malfunction Indicator Lamp (MIL)

OBD System Operation Chart

CONSULT-II

Generic Scan Tool (GST)

Introduction

Diagnostic Worksheet

Work Flow

Description for Work Flow

Basic Inspection

Diagnostic Trouble Code (DTC) Inspection Priority Chart

Fail-Safe Chart

Symptom Matrix Chart