Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 G50 FY33 1994-1996.1998-2000 Approved 2000.5_Q45 ec
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EXIT
ENGINE CONTROL SYSTEM
EC
GI
SECTION MA
EM
CONTENTS LC
DIAGNOSTIC TROUBLE CODE INDEX.........................4 Idle Speed/Ignition Timing/Idle Mixture Ratio
Alphabetical & P No. Index for DTC ...........................4 Adjustment .................................................................42
PRECAUTIONS AND PREPARATION............................8 ON BOARD DIAGNOSTIC SYSTEM
FE
Special Service Tool ....................................................8 DESCRIPTION ...............................................................49
Commercial Service Tools ...........................................8 Introduction ................................................................49
Supplemental Restraint System (SRS) AIR Two Trip Detection Logic ...........................................49 AT
BAG and SEAT BELT PRE-TENSIONER.............10 Emission-related Diagnostic Information ...................50
Precautions for On Board Diagnostic (OBD) Malfunction Indicator Lamp (MIL)..............................65
System of Engine and A/T.........................................10 OBD System Operation Chart ...................................69 PD
Engine Fuel & Emission Control System ..................11 CONSULT-II ...............................................................74
Precautions ................................................................12 Generic Scan Tool (GST) ..........................................85 FA
ENGINE AND EMISSION CONTROL OVERALL TROUBLE DIAGNOSIS - Introduction ........................87
SYSTEM.........................................................................14 Introduction ................................................................87
Circuit Diagram ..........................................................14 Diagnostic Worksheet................................................87 RA
System Diagram ........................................................16 TROUBLE DIAGNOSIS - Work Flow...........................89
Engine Control Component Parts Location...............17 Work Flow..................................................................89
Description for Work Flow .........................................90
BR
Vacuum Hose Drawing ..............................................19
System Chart .............................................................20 TROUBLE DIAGNOSIS - Basic Inspection ................91
ENGINE AND EMISSION BASIC CONTROL Basic Inspection.........................................................91 ST
SYSTEM DESCRIPTION ...............................................21 TROUBLE DIAGNOSIS - General Description...........97
Multiport Fuel Injection (MFI) System .......................21 Diagnostic Trouble Code (DTC) Inspection
Electronic Ignition (EI) System ..................................23 Priority Chart..............................................................97 RS
Fail-Safe Chart...........................................................98
Air Conditioning Cut Control......................................24
Symptom Matrix Chart...............................................99
Fuel Cut Control (at no load & high engine BT
CONSULT-II Reference Value in Data Monitor
speed) ........................................................................25
Mode ........................................................................102
EVAPORATIVE EMISSION SYSTEM ...........................26
Major Sensor Reference Graph in Data Monitor
Description .................................................................26 HA
Mode ........................................................................105
Inspection...................................................................26
ECM Terminals and Reference Value .....................107
Evaporative Emission Line Drawing..........................29 TROUBLE DIAGNOSIS FOR INTERMITTENT EL
On Board Refueling Vapor Recovery (ORVR) ..........31 INCIDENT.....................................................................117
POSITIVE CRANKCASE VENTILATION......................36 Description ...............................................................117
Description .................................................................36 Common I/I Report Situations .................................117 IDX
Inspection...................................................................36 Diagnostic Procedure ..............................................117
BASIC SERVICE PROCEDURE ...................................37 TROUBLE DIAGNOSIS FOR POWER SUPPLY........118
Fuel Pressure Release ..............................................37 Main Power Supply and Ground Circuit..................118
Fuel Pressure Check .................................................37 TROUBLE DIAGNOSIS FOR DTC P0100..................124
Injector Removal and Installation ..............................38 Mass Air Flow Sensor (MAFS) ................................124
Throttle Opener..........................................................39 TROUBLE DIAGNOSIS FOR DTC P0105..................132
Fast Idle Cam (FIC) Inspection and Adjustment .......40 Absolute Pressure Sensor.......................................132
Direct Ignition System - How to Check Idle TROUBLE DIAGNOSIS FOR DTC P0110 ..................140
Speed and Ignition Timing.........................................40 Intake Air Temperature Sensor................................140
EXIT
CONTENTS (Cont'd)
TROUBLE DIAGNOSIS FOR DTC P0115 ..................145 (Rear HO2S) (P0140: Left bank), (P0160: Right
Engine Coolant Temperature Sensor (ECTS) .........145 bank) ........................................................................233
TROUBLE DIAGNOSIS FOR DTC P0120..................150 TROUBLE DIAGNOSIS FOR DTC P0141 (-B1),
Throttle Position Sensor ..........................................150 P0161 (-B2)..................................................................239
TROUBLE DIAGNOSIS FOR DTC P0125..................161 Rear Heated Oxygen Sensor Heaters (P0141:
Engine Coolant Temperature (ECT) Sensor ...........161 Left bank), (P0161: Right bank) ..............................239
TROUBLE DIAGNOSIS FOR DTC P0130 (-B1), TROUBLE DIAGNOSIS FOR DTC P0171 (-B1),
P0150 (-B2)..................................................................166 P0174 (-B2)..................................................................245
Front Heated Oxygen Sensors (Front HO2S) Fuel Injection System Function (Lean side)
(Circuit) (P0130: Left bank), (P0150: Right bank)...166 (P0171: Left bank), (P0174: Right bank) ................245
TROUBLE DIAGNOSIS FOR DTC P0131 (-B1), TROUBLE DIAGNOSIS FOR DTC P0172 (-B1),
P0151 (-B2)..................................................................174 P0175 (-B2)..................................................................251
Front Heated Oxygen Sensor (Lean shift Fuel Injection System Function (Rich side)
monitoring) (Front HO2S) (P0131: Left bank), (P0172: Left bank), (P0175: Right bank) ................251
(P0151: Right bank).................................................174 TROUBLE DIAGNOSIS FOR DTC P0180..................257
TROUBLE DIAGNOSIS FOR DTC P0132 (-B1), Fuel Tank Temperature Sensor ...............................257
P0152 (-B2)..................................................................180 TROUBLE DIAGNOSIS FOR DTC P0300 - P0308....262
Front Heated Oxygen Sensor (Rich shift No. 1 - 8 Cylinder Misfire, Multiple Cylinder
monitoring) (Front HO2S) (P0132: Left bank), Misfire ......................................................................262
(P0152: Right bank).................................................180 TROUBLE DIAGNOSIS FOR DTC P0325 (-B1),
TROUBLE DIAGNOSIS FOR DTC P0133 (-B1), P0330 (-B2)..................................................................267
P0153 (-B2)..................................................................187 Knock Sensor (KS) (P0325: Left bank), (P0330:
Front Heated Oxygen Sensor (Response Right bank) ..............................................................267
monitoring) (Front HO2S) (P0133: Left bank), TROUBLE DIAGNOSIS FOR DTC P0335..................270
(P0153: Right bank).................................................187 Crankshaft Position Sensor (CKPS) (OBD) ............270
TROUBLE DIAGNOSIS FOR DTC P0134 (-B1), TROUBLE DIAGNOSIS FOR DTC P0340..................275
P0154 (-B2)..................................................................196 Camshaft Position Sensor (CMPS) .........................275
Front Heated Oxygen Sensor (High voltage) TROUBLE DIAGNOSIS FOR DTC P0400..................281
(Front HO2S) (P0134: Left bank), (P0154: Right EGR Function (Close) .............................................281
bank) ........................................................................196 TROUBLE DIAGNOSIS FOR DTC P0402..................290
TROUBLE DIAGNOSIS FOR DTC P0135 (-B1), EGRC-BPT Valve Function .....................................290
P0155 (-B2)..................................................................204 TROUBLE DIAGNOSIS FOR DTC P0420 (-B1),
Front Heated Oxygen Sensor Heater (P0135: P0430 (-B2)..................................................................295
Left bank), (P0155: Right bank) ..............................204 Three Way Catalyst Function (P0420: Left bank),
TROUBLE DIAGNOSIS FOR DTC P0137 (-B1), (P0430: Right bank).................................................295
P0157 (-B2)..................................................................210 TROUBLE DIAGNOSIS FOR DTC P0440..................298
Rear Heated Oxygen Sensor (Min. Voltage Evaporative Emission (EVAP) Control System
Monitoring) (Rear HO2S) (P0137: Left bank), (Small Leak) (Negative Pressure) ...........................298
(P0157: Right bank).................................................210 TROUBLE DIAGNOSIS FOR DTC P0443..................309
TROUBLE DIAGNOSIS FOR DTC P0138 (-B1), Evaporative Emission (EVAP) Canister Purge
P0158 (-B2)..................................................................218 Volume Control Valve (Circuit) ................................309
Rear Heated Oxygen Sensor (Max. Voltage TROUBLE DIAGNOSIS FOR DTC P0446..................315
Monitoring) (Rear HO2S) (P0138: Left bank), Evaporative Emission (EVAP) Canister Vent
(P0158: Right bank).................................................218 Control Valve (Circuit)..............................................315
TROUBLE DIAGNOSIS FOR DTC P0139 (-B1), TROUBLE DIAGNOSIS FOR DTC P0450..................320
P0159 (-B2)..................................................................226 Evaporative Emission (EVAP) Control System
Rear Heated Oxygen Sensor (Response Pressure Sensor ......................................................320
Monitoring) (Rear HO2S) (P0139: Left bank), TROUBLE DIAGNOSIS FOR DTC P0455..................326
(P0159: Right bank).................................................226 Evaporative Emission (EVAP) Control System
TROUBLE DIAGNOSIS FOR DTC P0140 (-B1), (Gross Leak) ............................................................326
P0160 (-B2)..................................................................233 TROUBLE DIAGNOSIS FOR DTC P0500..................335
Rear Heated Oxygen Sensor (High voltage) Vehicle Speed Sensor (VSS) ..................................335
EXIT
CONTENTS (Cont'd)
TROUBLE DIAGNOSIS FOR DTC P0505..................340 Evaporative Emission (EVAP) Control System
Idle Air Control Valve (IACV) - Auxiliary Air (Small Leak) (Positive Pressure).............................432
Control (AAC) Valve ................................................340 TROUBLE DIAGNOSIS FOR DTC P1444..................444
TROUBLE DIAGNOSIS FOR DTC P0510..................346 Evaporative Emission (EVAP) Canister Purge
GI
Closed Throttle Position Switch...............................346 Volume Control Valve ..............................................444
TROUBLE DIAGNOSIS FOR DTC P0600, P1605 .....352 TROUBLE DIAGNOSIS FOR DTC P1446..................452 MA
A/T Communication Line (P0600) and A/T Evaporative Emission (EVAP) Canister Vent
Diagnostic Communication Line (P1605) ................352 Control Valve (Close)...............................................452
TROUBLE DIAGNOSIS FOR DTC P0605..................355 TROUBLE DIAGNOSIS FOR DTC P1447..................457 EM
Engine Control Module (ECM) ................................355 Evaporative Emission (EVAP) Control System
TROUBLE DIAGNOSIS FOR DTC P1105 ..................358 Purge Flow Monitoring.............................................457
Manifold Absolute Pressure (MAP)/Barometric TROUBLE DIAGNOSIS FOR DTC P1448..................464 LC
Pressure (BARO) Switch Solenoid Valve................358 Evaporative Emission (EVAP) Canister Vent
TROUBLE DIAGNOSIS FOR DTC P1110 (-B1), Control Valve (Open) ...............................................464
P1135 (-B2) ..................................................................367 TROUBLE DIAGNOSIS FOR DTC P1490..................470
Intake Valve Timing Control (P1110: Left bank), Vacuum Cut Valve Bypass Valve (Circuit)...............470
(P1135: Right bank).................................................367 TROUBLE DIAGNOSIS FOR DTC P1491..................475 FE
TROUBLE DIAGNOSIS FOR DTC P1120 ..................375 Vacuum Cut Valve Bypass Valve ............................475
Secondary Throttle Position Sensor (STPS)...........375 TROUBLE DIAGNOSIS FOR DTC P1492..................481
TROUBLE DIAGNOSIS FOR DTC P1125 ..................381 Evaporative Emission (EVAP) Canister Purge AT
Tandem Throttle Position Sensor ............................381 Control Valve/Solenoid Valve (Circuit).....................481
TROUBLE DIAGNOSIS FOR DTC P1140 (-B1), TROUBLE DIAGNOSIS FOR DTC P1493..................487
PD
P1145 (-B2) ..................................................................382 Evaporative Emission (EVAP) Canister Purge
Intake Valve Timing Control Position Sensor Control Valve/Solenoid Valve ..................................487
(P1140: Left bank), (P1145: Right bank) .................382 TROUBLE DIAGNOSIS FOR DTC P1706..................494 FA
TROUBLE DIAGNOSIS FOR DTC P1148 (-B1), Park/Neutral Position (PNP) Switch ........................494
P1168 (-B2) ..................................................................388 TROUBLE DIAGNOSIS FOR ABS/TCS C/U
Closed Loop Control (P1148: Left bank), (P1168: SIGNAL ........................................................................499 RA
Right bank) ..............................................................388 ABS/TCS Control Unit .............................................499
TROUBLE DIAGNOSIS FOR DTC P1210..................390 TROUBLE DIAGNOSIS FOR ECM - ABS/TCS
Traction Control System (TCS) Signal Circuit.........390 COMM NG....................................................................500
BR
TROUBLE DIAGNOSIS FOR DTC P1220..................393 ABS/TCS Communication Line ...............................500
Fuel Pump Control Module (FPCM)........................393 TROUBLE DIAGNOSIS FOR OVERHEAT .................503 ST
TROUBLE DIAGNOSIS FOR DTC P1320..................399 Overheat ..................................................................503
Ignition Signal ..........................................................399 TROUBLE DIAGNOSIS FOR NON-DETECTABLE
TROUBLE DIAGNOSIS FOR DTC P1336..................407 ITEMS...........................................................................515 RS
Crankshaft Position Sensor (CKPS) (OBD) Injector .....................................................................515
(COG) ......................................................................407 Start Signal ..............................................................521
TROUBLE DIAGNOSIS FOR DTC P1400..................412 Fuel Pump Control...................................................523 BT
EGRC-solenoid Valve ............................................412 Power Steering Oil Pressure Switch .......................527
TROUBLE DIAGNOSIS FOR DTC P1401..................417 Electrical Load Signal ..............................................532
HA
EGR Temperature Sensor .......................................417 MIL & Data Link Connectors ...................................535
TROUBLE DIAGNOSIS FOR DTC P1402..................423 SERVICE DATA AND SPECIFICATIONS (SDS) ........536
EGR Function (Open)..............................................423 General Specifications.............................................536 EL
TROUBLE DIAGNOSIS FOR DTC P1440..................432 Inspection and Adjustment ......................................536
When you read wiring diagrams: IDX
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