Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 G50 FY33 1994-1996.1998-2000 Approved 2000.0_Q45 ec
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EXIT
ENGINE CONTROL SYSTEM
EC
GI
SECTION MA
EM
CONTENTS LC
DIAGNOSTIC TROUBLE CODE INDEX.........................4 ON BOARD DIAGNOSTIC SYSTEM
Alphabetical & P No. Index for DTC ...........................4 DESCRIPTION ...............................................................49
PRECAUTIONS AND PREPARATION............................8 Introduction ................................................................49
Special Service Tool ....................................................8 Two Trip Detection Logic ...........................................49 FE
Commercial Service Tools ...........................................8 Emission-related Diagnostic Information ...................50
Supplemental Restraint System (SRS) AIR Malfunction Indicator Lamp (MIL)..............................65
BAG and SEAT BELT PRE-TENSIONER.............10 OBD System Operation Chart ...................................69 AT
Precautions for On Board Diagnostic (OBD) CONSULT-II ...............................................................74
System of Engine and A/T.........................................10 Generic Scan Tool (GST) ..........................................85
PD
Engine Fuel & Emission Control System ..................11 TROUBLE DIAGNOSIS - Introduction ........................87
Precautions ................................................................12 Introduction ................................................................87
ENGINE AND EMISSION CONTROL OVERALL Diagnostic Worksheet................................................87 FA
SYSTEM.........................................................................14 TROUBLE DIAGNOSIS - Work Flow...........................89
Circuit Diagram ..........................................................14 Work Flow..................................................................89
System Diagram ........................................................16 Description for Work Flow .........................................90 RA
Engine Control Component Parts Location...............17 TROUBLE DIAGNOSIS - Basic Inspection ................91
Vacuum Hose Drawing ..............................................19 Basic Inspection.........................................................91
System Chart .............................................................20 TROUBLE DIAGNOSIS - General Description...........97
BR
ENGINE AND EMISSION BASIC CONTROL Diagnostic Trouble Code (DTC) Inspection
SYSTEM DESCRIPTION ...............................................21 Priority Chart..............................................................97 ST
Multiport Fuel Injection (MFI) System .......................21 Fail-Safe Chart...........................................................98
Electronic Ignition (EI) System ..................................23 Symptom Matrix Chart...............................................99
Air Conditioning Cut Control......................................24 CONSULT-II Reference Value in Data Monitor RS
Fuel Cut Control (at no load & high engine Mode ........................................................................102
speed) ........................................................................25 Major Sensor Reference Graph in Data Monitor
EVAPORATIVE EMISSION SYSTEM ...........................26 Mode ........................................................................105 BT
Description .................................................................26 ECM Terminals and Reference Value .....................107
Inspection...................................................................26 TROUBLE DIAGNOSIS FOR INTERMITTENT HA
Evaporative Emission Line Drawing..........................29 INCIDENT.....................................................................117
On Board Refueling Vapor Recovery (ORVR) ..........31 Description ...............................................................117
POSITIVE CRANKCASE VENTILATION......................36 Common I/I Report Situations .................................117 EL
Description .................................................................36 Diagnostic Procedure ..............................................117
Inspection...................................................................36 TROUBLE DIAGNOSIS FOR POWER SUPPLY........118
BASIC SERVICE PROCEDURE ...................................37 Main Power Supply and Ground Circuit..................118 IDX
Fuel Pressure Release ..............................................37 TROUBLE DIAGNOSIS FOR DTC P0100..................124
Fuel Pressure Check .................................................37 Mass Air Flow Sensor (MAFS) ................................124
Injector Removal and Installation ..............................38 TROUBLE DIAGNOSIS FOR DTC P0105..................132
Throttle Opener..........................................................39 Absolute Pressure Sensor.......................................132
Fast Idle Cam (FIC) Inspection and Adjustment .......40 TROUBLE DIAGNOSIS FOR DTC P0110 ..................140
Direct Ignition System - How to Check Idle Intake Air Temperature Sensor................................140
Speed and Ignition Timing.........................................40 TROUBLE DIAGNOSIS FOR DTC P0115 ..................145
Idle Speed/Ignition Timing/Idle Mixture Ratio Engine Coolant Temperature Sensor (ECTS) .........145
Adjustment .................................................................42 TROUBLE DIAGNOSIS FOR DTC P0120..................150
EXIT
CONTENTS (Cont'd)
Throttle Position Sensor ..........................................150 TROUBLE DIAGNOSIS FOR DTC P0141 (-B1),
TROUBLE DIAGNOSIS FOR DTC P0125..................161 P0161 (-B2)..................................................................237
Engine Coolant Temperature (ECT) Sensor ...........161 Rear Heated Oxygen Sensor Heaters (P0141:
TROUBLE DIAGNOSIS FOR DTC P0130 (-B1), Left bank), (P0161: Right bank) ..............................237
P0150 (-B2)..................................................................166 TROUBLE DIAGNOSIS FOR DTC P0171 (-B1),
Front Heated Oxygen Sensors (Front HO2S) P0174 (-B2)..................................................................243
(Circuit) (P0130: Left bank), (P0150: Right bank)...166 Fuel Injection System Function (Lean side)
TROUBLE DIAGNOSIS FOR DTC P0131 (-B1), (P0171: Left bank), (P0174: Right bank) ................243
P0151 (-B2)..................................................................174 TROUBLE DIAGNOSIS FOR DTC P0172 (-B1),
Front Heated Oxygen Sensor (Lean shift P0175 (-B2)..................................................................249
monitoring) (Front HO2S) (P0131: Left bank), Fuel Injection System Function (Rich side)
(P0151: Right bank).................................................174 (P0172: Left bank), (P0175: Right bank) ................249
TROUBLE DIAGNOSIS FOR DTC P0132 (-B1), TROUBLE DIAGNOSIS FOR DTC P0180..................255
P0152 (-B2)..................................................................180 Fuel Tank Temperature Sensor ...............................255
Front Heated Oxygen Sensor (Rich shift TROUBLE DIAGNOSIS FOR DTC P0300 - P0308....260
monitoring) (Front HO2S) (P0132: Left bank), No. 1 - 8 Cylinder Misfire, Multiple Cylinder
(P0152: Right bank).................................................180 Misfire ......................................................................260
TROUBLE DIAGNOSIS FOR DTC P0133 (-B1), TROUBLE DIAGNOSIS FOR DTC P0325 (-B1),
P0153 (-B2)..................................................................186 P0330 (-B2)..................................................................265
Front Heated Oxygen Sensor (Response Knock Sensor (KS) (P0325: Left bank), (P0330:
monitoring) (Front HO2S) (P0133: Left bank), Right bank) ..............................................................265
(P0153: Right bank).................................................186 TROUBLE DIAGNOSIS FOR DTC P0335..................268
TROUBLE DIAGNOSIS FOR DTC P0134 (-B1), Crankshaft Position Sensor (CKPS) (OBD) ............268
P0154 (-B2)..................................................................195 TROUBLE DIAGNOSIS FOR DTC P0340..................273
Front Heated Oxygen Sensor (High voltage) Camshaft Position Sensor (CMPS) .........................273
(Front HO2S) (P0134: Left bank), (P0154: Right TROUBLE DIAGNOSIS FOR DTC P0400..................279
bank) ........................................................................195 EGR Function (Close) .............................................279
TROUBLE DIAGNOSIS FOR DTC P0135 (-B1), TROUBLE DIAGNOSIS FOR DTC P0402..................288
P0155 (-B2)..................................................................202 EGRC-BPT Valve Function .....................................288
Front Heated Oxygen Sensor Heater (P0135: TROUBLE DIAGNOSIS FOR DTC P0420 (-B1),
Left bank), (P0155: Right bank) ..............................202 P0430 (-B2)..................................................................293
TROUBLE DIAGNOSIS FOR DTC P0137 (-B1), Three Way Catalyst Function (P0420: Left bank),
P0157 (-B2)..................................................................208 (P0430: Right bank).................................................293
Rear Heated Oxygen Sensor (Min. Voltage TROUBLE DIAGNOSIS FOR DTC P0440..................296
Monitoring) (Rear HO2S) (P0137: Left bank), Evaporative Emission (EVAP) Control System
(P0157: Right bank).................................................208 (Small Leak) (Negative Pressure) ...........................296
TROUBLE DIAGNOSIS FOR DTC P0138 (-B1), TROUBLE DIAGNOSIS FOR DTC P0443..................307
P0158 (-B2)..................................................................216 Evaporative Emission (EVAP) Canister Purge
Rear Heated Oxygen Sensor (Max. Voltage Volume Control Valve (Circuit) ................................307
Monitoring) (Rear HO2S) (P0138: Left bank), TROUBLE DIAGNOSIS FOR DTC P0446..................313
(P0158: Right bank).................................................216 Evaporative Emission (EVAP) Canister Vent
TROUBLE DIAGNOSIS FOR DTC P0139 (-B1), Control Valve (Circuit)..............................................313
P0159 (-B2)..................................................................224 TROUBLE DIAGNOSIS FOR DTC P0450..................318
Rear Heated Oxygen Sensor (Response Evaporative Emission (EVAP) Control System
Monitoring) (Rear HO2S) (P0139: Left bank), Pressure Sensor ......................................................318
(P0159: Right bank).................................................224 TROUBLE DIAGNOSIS FOR DTC P0455..................324
TROUBLE DIAGNOSIS FOR DTC P0140 (-B1), Evaporative Emission (EVAP) Control System
P0160 (-B2)..................................................................231 (Gross Leak) ............................................................324
Rear Heated Oxygen Sensor (High voltage) TROUBLE DIAGNOSIS FOR DTC P0500..................333
(Rear HO2S) (P0140: Left bank), (P0160: Right Vehicle Speed Sensor (VSS) ..................................333
bank) ........................................................................231 TROUBLE DIAGNOSIS FOR DTC P0505..................338
EXIT
CONTENTS (Cont'd)
Idle Air Control Valve (IACV) - Auxiliary Air (Small Leak) (Positive Pressure).............................430
Control (AAC) Valve ................................................338 TROUBLE DIAGNOSIS FOR DTC P1444..................442
TROUBLE DIAGNOSIS FOR DTC P0510..................344 Evaporative Emission (EVAP) Canister Purge
Closed Throttle Position Switch...............................344 Volume Control Valve ..............................................442
GI
TROUBLE DIAGNOSIS FOR DTC P0600, P1605 .....350 TROUBLE DIAGNOSIS FOR DTC P1446..................450
A/T Communication Line (P0600) and A/T Evaporative Emission (EVAP) Canister Vent MA
Diagnostic Communication Line (P1605) ................350 Control Valve (Close)...............................................450
TROUBLE DIAGNOSIS FOR DTC P0605..................353 TROUBLE DIAGNOSIS FOR DTC P1447..................455
Engine Control Module (ECM) ................................353 Evaporative Emission (EVAP) Control System EM
TROUBLE DIAGNOSIS FOR DTC P1105 ..................356 Purge Flow Monitoring.............................................455
Manifold Absolute Pressure (MAP)/Barometric TROUBLE DIAGNOSIS FOR DTC P1448..................462
Pressure (BARO) Switch Solenoid Valve................356 Evaporative Emission (EVAP) Canister Vent LC
TROUBLE DIAGNOSIS FOR DTC P1110 (-B1), Control Valve (Open) ...............................................462
P1135 (-B2) ..................................................................365 TROUBLE DIAGNOSIS FOR DTC P1490..................468
Intake Valve Timing Control (P1110: Left bank), Vacuum Cut Valve Bypass Valve (Circuit)...............468
(P1135: Right bank).................................................365 TROUBLE DIAGNOSIS FOR DTC P1491..................473
TROUBLE DIAGNOSIS FOR DTC P1120 ..................373 Vacuum Cut Valve Bypass Valve ............................473 FE
Secondary Throttle Position Sensor (STPS)...........373 TROUBLE DIAGNOSIS FOR DTC P1492..................479
TROUBLE DIAGNOSIS FOR DTC P1125 ..................379 Evaporative Emission (EVAP) Canister Purge
Tandem Throttle Position Sensor ............................379 Control Valve/Solenoid Valve (Circuit).....................479 AT
TROUBLE DIAGNOSIS FOR DTC P1140 (-B1), TROUBLE DIAGNOSIS FOR DTC P1493..................485
P1145 (-B2) ..................................................................380 Evaporative Emission (EVAP) Canister Purge
PD
Intake Valve Timing Control Position Sensor Control Valve/Solenoid Valve ..................................485
(P1140: Left bank), (P1145: Right bank) .................380 TROUBLE DIAGNOSIS FOR DTC P1706..................492
TROUBLE DIAGNOSIS FOR DTC P1148 (-B1), Park/Neutral Position (PNP) Switch ........................492 FA
P1168 (-B2) ..................................................................386 TROUBLE DIAGNOSIS FOR ABS/TCS C/U
Closed Loop Control (P1148: Left bank), (P1168: SIGNAL ........................................................................497
Right bank) ..............................................................386 ABS/TCS Control Unit .............................................497 RA
TROUBLE DIAGNOSIS FOR DTC P1210..................388 TROUBLE DIAGNOSIS FOR ECM - ABS/TCS
Traction Control System (TCS) Signal Circuit.........388 COMM NG....................................................................498
TROUBLE DIAGNOSIS FOR DTC P1220..................391 ABS/TCS Communication Line ...............................498
BR
Fuel Pump Control Module (FPCM)........................391 TROUBLE DIAGNOSIS FOR OVERHEAT .................501
TROUBLE DIAGNOSIS FOR DTC P1320..................397 Overheat ..................................................................501 ST
Ignition Signal ..........................................................397 TROUBLE DIAGNOSIS FOR NON-DETECTABLE
TROUBLE DIAGNOSIS FOR DTC P1336..................405 ITEMS...........................................................................513
Crankshaft Position Sensor (CKPS) (OBD) Injector .....................................................................513 RS
(COG) ......................................................................405 Start Signal ..............................................................519
TROUBLE DIAGNOSIS FOR DTC P1400..................410 Fuel Pump Control...................................................521
EGRC-solenoid Valve ............................................410 Power Steering Oil Pressure Switch .......................525 BT
TROUBLE DIAGNOSIS FOR DTC P1401..................415 Electrical Load Signal ..............................................530
EGR Temperature Sensor .......................................415 MIL & Data Link Connectors ...................................533
HA
TROUBLE DIAGNOSIS FOR DTC P1402..................421 SERVICE DATA AND SPECIFICATIONS (SDS) ........534
EGR Function (Open)..............................................421 General Specifications.............................................534
TROUBLE DIAGNOSIS FOR DTC P1440..................430 Inspection and Adjustment ......................................534 EL
Evaporative Emission (EVAP) Control System
When you read wiring diagrams: IDX
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