2001 INFINITI QX4 Factory Service Manual

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Page 529 of 2395

INFINITI QX4 2001 Factory Service Manual Removal and InstallationNBBT0020CAUTION:
Be careful not to scratch door rearview mirror body.
HFor Wiring Diagram, refer to EL-177, ªDOOR MIRRORº for details.
1. Remove door trim. Refer to ªDOOR TR

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INFINITI QX4 2001 Factory Service Manual AlignmentNBBT0021IAll dimensions indicated in figures are actual ones.
IWhen using a tracking gauge, adjust both pointers to equal length. Then check the pointers and gauge
itself to make sure there i

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INFINITI QX4 2001 Factory Service Manual ENGINE COMPARTMENTNBBT0021S01MeasurementNBBT0021S0101
SBT194
BODY (ALIGNMENT)
Alignment (Contd)
BT-58

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INFINITI QX4 2001 Factory Service Manual Measurement PointsNBBT0021S0102
SBT195
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
HA
SC
EL
IDX
BODY (ALIGNMENT)
Alignment (Contd)
BT-59

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INFINITI QX4 2001 Factory Service Manual UNDERBODYNBBT0021S02MeasurementNBBT0021S0201
SBT360
BODY (ALIGNMENT)
Alignment (Contd)
BT-60

Page 534 of 2395

INFINITI QX4 2001 Factory Service Manual Measurement PointsNBBT0021S0202
SBT361
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
HA
SC
EL
IDX
BODY (ALIGNMENT)
Alignment (Contd)
BT-61

Page 535 of 2395

INFINITI QX4 2001 Factory Service Manual NOTES

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INFINITI QX4 2001 Factory Service Manual ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
TROUBLE DIAGNOSIS - INDEX....................................8
Alphabetical & P No. Index for DTC ...........................8
PRECAUTIONS....................

ENGINE CONTROL SYSTEM
SECTION
EC
CONTENTS
TROUBLE DIAGNOSIS - INDEX....................................8
Alphabetical & P No. Index for DTC ...........................8
PRECAUTIONS.............................................................14
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER².............14
Precautions for On Board Diagnostic (OBD)
System of Engine and A/T.........................................14
Engine Fuel & Emission Control System ..................15
Precautions ................................................................16
Wiring Diagrams and Trouble Diagnosis ...................17
PREPARATION.............................................................18
Special Service Tools ................................................18
Commercial Service Tools .........................................18
ENGINE AND EMISSION CONTROL OVERALL
SYSTEM.........................................................................20
Engine Control Component Parts Location ...............20
Circuit Diagram ..........................................................24
System Diagram ........................................................25
Vacuum Hose Drawing ..............................................26
System Chart .............................................................27
ENGINE AND EMISSION BASIC CONTROL
SYSTEM DESCRIPTION...............................................28
Multiport Fuel Injection (MFI) System .......................28
Electronic Ignition (EI) System ..................................30
Air Conditioning Cut Control ......................................31
Fuel Cut Control (at no load & high engine
speed) ........................................................................32
Evaporative Emission System ...................................32
Positive Crankcase Ventilation ..................................38
BASIC SERVICE PROCEDURE...................................39
Fuel Pressure Release ..............................................39
Fuel Pressure Check .................................................39
Fuel Pressure Regulator Check ................................40
Injector .......................................................................41
How to Check Idle Speed and Ignition Timing ..........42
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment .................................................................43
Idle Air Volume Learning ...........................................57ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................59
Introduction ................................................................59
Two Trip Detection Logic ...........................................59
Emission-related Diagnostic Information ...................60
Malfunction Indicator Lamp (MIL) ..............................74
OBD System Operation Chart ...................................75
CONSULT-II ...............................................................81
Generic Scan Tool (GST) ..........................................95
TROUBLE DIAGNOSIS - INTRODUCTION..................97
Introduction ................................................................97
Work Flow ..................................................................99
TROUBLE DIAGNOSIS - BASIC INSPECTION.........101
Basic Inspection.......................................................101
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION............................................................. 116
DTC Inspection Priority Chart.................................. 116
Fail-safe Chart ......................................................... 117
Symptom Matrix Chart ............................................. 118
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................122
Major Sensor Reference Graph in Data Monitor
Mode ........................................................................124
ECM Terminals and Reference Value .....................127
TROUBLE DIAGNOSIS - SPECIFICATION VALUE..136
Description ...............................................................136
Testing Condition .....................................................136
Inspection Procedure ...............................................136
Diagnostic Procedure ..............................................137
TROUBLE DIAGNOSIS FOR INTERMITTENT
INCIDENT.....................................................................140
Description ...............................................................140
Diagnostic Procedure ..............................................140
TROUBLE DIAGNOSIS FOR POWER SUPPLY........141
ECM Terminals and Reference Value .....................141
Main Power Supply and Ground Circuit ..................142
DTC P0100 MASS AIR FLOW SENSOR (MAFS)......150
Component Description ...........................................150
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX

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