Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2001_Q45 ec
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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
CONTENTS (Cont'd)
TROUBLE DIAGNOSIS FOR DTC P0115 ..................145 Fuel Injection System Function (Lean side)
Engine Coolant Temperature Sensor (ECTS) .........145 (P0171: Bank 1), (P0174: Bank 2) ..........................245
TROUBLE DIAGNOSIS FOR DTC P0120..................150 TROUBLE DIAGNOSIS FOR DTC P0172 (B1),
Throttle Position Sensor ..........................................150 P0175 (B2) ...................................................................251
TROUBLE DIAGNOSIS FOR DTC P0125..................161 Fuel Injection System Function (Rich side)
Engine Coolant Temperature (ECT) Sensor ...........161 (P0172: Left bank), (P0175: Right bank) ................251
TROUBLE DIAGNOSIS FOR DTC P0130 (B1), TROUBLE DIAGNOSIS FOR DTC P0180..................257
P0150 (B2) ...................................................................166 Fuel Tank Temperature Sensor ...............................257
Heated Oxygen Sensor 1 (Front) (P0130: Bank TROUBLE DIAGNOSIS FOR DTC P0300 - P0308....262
1), (P0150: Bank 2) (Circuit) ...................................166 No. 1 - 8 Cylinder Misfire, Multiple Cylinder
TROUBLE DIAGNOSIS FOR DTC P0131 (B1), Misfire ......................................................................262
P0151 (B2) ...................................................................174 TROUBLE DIAGNOSIS FOR DTC P0325 (B1),
Heated Oxygen Sensor 1 (Front) (P0131: Bank P0330 (B2) ...................................................................267
1), (P0151: Bank 2) (Lean shift monitoring)............174 Knock Sensor (KS) (P0325: Left bank), (P0330:
TROUBLE DIAGNOSIS FOR DTC P0132 (B1), Right bank) ..............................................................267
P0152 (B2) ...................................................................180 TROUBLE DIAGNOSIS FOR DTC P0335..................270
Heated Oxygen Sensor 1 (Front) (P0132: Bank Crankshaft Position Sensor (CKPS) (OBD) ............270
1), (P0152: Bank 2) (Rich Shift Monitoring) ............180 TROUBLE DIAGNOSIS FOR DTC P0340..................275
TROUBLE DIAGNOSIS FOR DTC P0133 (B1), Camshaft Position Sensor (CMPS) .........................275
P0153 (B2) ...................................................................187 TROUBLE DIAGNOSIS FOR DTC P0400..................281
Heated Oxygen Sensor 1 (Front) (P0133: Bank EGR Function (Close) .............................................281
1), (P0153: Bank 2) (Response monitoring) ...........187 TROUBLE DIAGNOSIS FOR DTC P0402..................290
TROUBLE DIAGNOSIS FOR DTC P0134 (B1), EGRC-BPT Valve Function .....................................290
P0154 (B2) ...................................................................196 TROUBLE DIAGNOSIS FOR DTC P0420 (B1),
Heated Oxygen Sensor 1 (Front) (P0134: Bank P0430 (B2) ...................................................................295
1), (P0154: Bank 2) .................................................196 Three Way Catalyst Function (P0420: Left bank),
TROUBLE DIAGNOSIS FOR DTC P0135 (B1), (P0430: Right bank).................................................295
P0155 (B2) ...................................................................204 TROUBLE DIAGNOSIS FOR DTC P0440..................298
Heated Oxygen Sensor 1 Heater (Front) (P0135: Evaporative Emission (EVAP) Control System
Bank 1), (P0155: Bank 2)........................................204 (Small Leak) (Negative Pressure) ...........................298
TROUBLE DIAGNOSIS FOR DTC P0137 (B1), TROUBLE DIAGNOSIS FOR DTC P0443..................309
P0157 (B2) ...................................................................210 Evaporative Emission (EVAP) Canister Purge
Heated Oxygen Sensor 2 (Rear) (P0137: Bank Volume Control Valve (Circuit) ................................309
1), (P0157: Bank 2) (Min. Voltage Monitoring)........210 TROUBLE DIAGNOSIS FOR DTC P0446..................315
TROUBLE DIAGNOSIS FOR DTC P0138 (B1), Evaporative Emission (EVAP) Canister Vent
P0158 (B2) ...................................................................218 Control Valve (Circuit)..............................................315
Heated Oxygen Sensor 2 (Rear) (P0138: Bank TROUBLE DIAGNOSIS FOR DTC P0450..................320
1), (P0158: Bank 2) (Max. Voltage Monitoring).......218 Evaporative Emission (EVAP) Control System
TROUBLE DIAGNOSIS FOR DTC P0139 (B1), Pressure Sensor ......................................................320
P0159 (B2) ...................................................................226 TROUBLE DIAGNOSIS FOR DTC P0455..................326
Heated Oxygen Sensor 2 (Rear) (P0139: Bank Evaporative Emission (EVAP) Control System
1), (P0159: Bank 2) (Response Monitoring) ...........226 (Gross Leak) ............................................................326
TROUBLE DIAGNOSIS FOR DTC P0140 (B1), TROUBLE DIAGNOSIS FOR DTC P0500..................335
P0160 (B2) ...................................................................233 Vehicle Speed Sensor (VSS) ..................................335
Heated Oxygen Sensor 2 (Rear) (P0140: Bank TROUBLE DIAGNOSIS FOR DTC P0505..................340
1), (P0160: Bank 2) (High voltage) .........................233 Idle Air Control Valve (IACV) - Auxiliary Air
TROUBLE DIAGNOSIS FOR DTC P0141 (B1), Control (AAC) Valve ................................................340
P0161 (B2) ...................................................................239 TROUBLE DIAGNOSIS FOR DTC P0510..................346
Heated Oxygen Sensor 2 Heaters (Rear) Closed Throttle Position Switch...............................346
(P0141: Bank 1), (P0161: Bank 2) ..........................239 TROUBLE DIAGNOSIS FOR DTC P0600, P1605 .....352
TROUBLE DIAGNOSIS FOR DTC P0171 (B1), A/T Communication Line (P0600) and A/T
P0174 (B2) ...................................................................245 Diagnostic Communication Line (P1605) ................352
EC-2
CONTENTS (Cont'd)
TROUBLE DIAGNOSIS FOR DTC P0605..................355 TROUBLE DIAGNOSIS FOR DTC P1446..................452
Engine Control Module (ECM) ................................355 Evaporative Emission (EVAP) Canister Vent
TROUBLE DIAGNOSIS FOR DTC P1105 ..................358 Control Valve (Close)...............................................452
Manifold Absolute Pressure (MAP)/Barometric
GI
TROUBLE DIAGNOSIS FOR DTC P1447..................457
Pressure (BARO) Switch Solenoid Valve................358 Evaporative Emission (EVAP) Control System
TROUBLE DIAGNOSIS FOR DTC P1110 (B1), Purge Flow Monitoring.............................................457 MA
P1135 (B2) ...................................................................367 TROUBLE DIAGNOSIS FOR DTC P1448..................464
Intake Valve Timing Control (P1110: Left bank), Evaporative Emission (EVAP) Canister Vent
(P1135: Right bank).................................................367 Control Valve (Open) ...............................................464
EM
TROUBLE DIAGNOSIS FOR DTC P1120 ..................375 TROUBLE DIAGNOSIS FOR DTC P1490..................470
Secondary Throttle Position Sensor (STPS)...........375
Vacuum Cut Valve Bypass Valve (Circuit)...............470 LC
TROUBLE DIAGNOSIS FOR DTC P1125 ..................381
TROUBLE DIAGNOSIS FOR DTC P1491..................475
Tandem Throttle Position Sensor ............................381
Vacuum Cut Valve Bypass Valve ............................475
TROUBLE DIAGNOSIS FOR DTC P1140 (B1),
TROUBLE DIAGNOSIS FOR DTC P1492..................481
P1145 (B2) ...................................................................382
Evaporative Emission (EVAP) Canister Purge
Intake Valve Timing Control Position Sensor
Control Valve/Solenoid Valve (Circuit).....................481
(P1140: Left bank), (P1145: Right bank) .................382 FE
TROUBLE DIAGNOSIS FOR DTC P1148 (B1), TROUBLE DIAGNOSIS FOR DTC P1493..................487
P1168 (B2) ...................................................................388 Evaporative Emission (EVAP) Canister Purge
Closed Loop Control (P1148: Left bank), (P1168: Control Valve/Solenoid Valve ..................................487 AT
Right bank) ..............................................................388 TROUBLE DIAGNOSIS FOR DTC P1706..................494
TROUBLE DIAGNOSIS FOR DTC P1210..................390 Park/Neutral Position (PNP) Switch ........................494
TROUBLE DIAGNOSIS FOR ABS/TCS C/U PD
Traction Control System (TCS) Signal Circuit.........390
TROUBLE DIAGNOSIS FOR DTC P1220..................393 SIGNAL ........................................................................499
Fuel Pump Control Module (FPCM)........................393 ABS/TCS Control Unit .............................................499 FA
TROUBLE DIAGNOSIS FOR DTC P1320..................399 TROUBLE DIAGNOSIS FOR ECM - ABS/TCS
Ignition Signal ..........................................................399 COMM NG....................................................................500
TROUBLE DIAGNOSIS FOR DTC P1336..................407 ABS/TCS Communication Line ...............................500 RA
Crankshaft Position Sensor (CKPS) (OBD) TROUBLE DIAGNOSIS FOR OVERHEAT .................503
(COG) ......................................................................407 Overheat ..................................................................503
TROUBLE DIAGNOSIS FOR DTC P1400..................412
BR
TROUBLE DIAGNOSIS FOR NON-DETECTABLE
EGRC-solenoid Valve ............................................412 ITEMS...........................................................................515
TROUBLE DIAGNOSIS FOR DTC P1401..................417 Injector .....................................................................515 ST
EGR Temperature Sensor .......................................417 Start Signal ..............................................................521
TROUBLE DIAGNOSIS FOR DTC P1402..................423 Fuel Pump Control...................................................523
EGR Function (Open)..............................................423 Power Steering Oil Pressure Switch .......................527 RS
TROUBLE DIAGNOSIS FOR DTC P1440..................432
Electrical Load Signal ..............................................532
Evaporative Emission (EVAP) Control System
MIL & Data Link Connectors ...................................535 BT
(Small Leak) (Positive Pressure).............................432
SERVICE DATA AND SPECIFICATIONS (SDS) ........536
TROUBLE DIAGNOSIS FOR DTC P1444..................444
General Specifications.............................................536
Evaporative Emission (EVAP) Canister Purge
Inspection and Adjustment ......................................536 HA
Volume Control Valve ..............................................444
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