Infiniti QX4 (R50). Manual — part 491

A

AAC/V - Wiring diagram . . . . . . . ...EC-425
ABS - Wiring diagram . . . . . . . . . BR-37
ABS sensor rotor . . . . . . . . . . AX-6, 19
Absolute pressure sensor . . . . . . . EC-158
A/C air flow . . . . . . . . . . . . . .HA-25
A/C component layout . . . . . . . . . HA-19
A/C compressor clutch removal and

installation . . . . . . . . . . . . .HA-150

A/C compressor precaution. . . . . . . ..HA-6
A/C compressor special service tool. . . ..HA-10
A/C control operation (auto A/C) . . . . . HA-23
A/C diagnostic work flow (auto A/C) . . . ..HA-65
A/C HFC134a (R134a) system

precaution . . . . . . . . . . . . . .HA-2

A/C HFC134a (R134a) system service

procedure. . . . . . . . . . . . ..HA-144

A/C HFC134a (R134a) system service

tools. . . . . . . . . . . . . . . .HA-11

A/C HFC134a system service equip-

ment precaution . . . . . . . . . . . HA-7

A/C lubricant (R134a). . . . . . . . ...HA-146
A/C operational check . . . . . . . . . HA-66
A/C performance chart . . . . . . . . .HA-116
A/C performance test diagnoses . . . . ..HA-114
A/C relay . . . . . . . . . . . . . ...HA-110
A/C self-diagnoses (auto A/C). . . . . . HA-44
A/C service data specification . . . . . ..HA-160
A/C system description (auto A/C) . . . . .HA-23
A/C trouble diagnoses (auto A/C) . . . . ..HA-27
A/C, A - Wiring diagram . . . . . . ...HA-31, 36
Accelerator control system . . . . . . . ...FE-3
Accelerator wire adjustment . . . . . . . .FE-3
Actuator lever (Transfer) . . . . . . . ...TF-120
Air bag . . . . . . . . . . . . . . . RS-10
Air bag disposal. . . . . . . . . . . ..RS-22
Air bag precautions . . . . . . . . . . ...GI-3
Air bleeding for brake system . . . . . . ..BR-8
Air cleaner filter replacement . . . . . . .MA-17
Air conditioner cut control . . . . . . . ..EC-31
Air flow meter - See Mass air flow

sensor . . . . . . . . . . . . . ...EC-150

Air mix door control linkage adjustment. . .HA-85
Air mix. door motor . . . . . . . . HA-82, 141
Air spoiler, rear. . . . . . . . . . . . BT-35
All - mode 4WD system . . . . . . . . ..TF-10
Alternator . . . . . . . . . . . . . . SC-28
Ambient sensor . . . . . . . . . . . HA-129
Angular tightening application. . . . . . ..EM-3
Antenna - See Power antenna . . . . . .EL-169
Anti-lock brake system - Wiring

diagram . . . . . . . . . . . . . ...BR-37

AP/SEN - Wiring diagram . . . . . . . EC-160
ASCD (automatic speed control device) . ..EL-221
ASCD - Wiring diagram . . . . . . . . EL-225
A/T - Wiring diagram - AT - FTS . . . . ...AT-107
A/T - Wiring diagram - AT - MAIN. . . . ...AT-96
A/T - Wiring diagram - AT - PNP/SW. . . AT-101

A/T - Wiring diagram - AT - VSS A/T . . . AT-113
A/T control . . . . . . . . . . . . . EC-440
A/T diagnosis communication line. . . . EC-603
A/T fluid temperature sensor . . . . . . .AT-110
A/T self-diagnoses. . . . . . . . . . ...AT-46
A/T shift lock system . . . . . . . . . .AT-265
A/T shift lock system - Wiring diagram . . .AT-266
A/T trouble diagnoses . . . . . . . . . .AT-53
A/T Wiring diagram - AT - ENG SS. . . ...AT-117
A/T Wiring diagram AT - 1ST . . . . . . AT-123
A/T Wiring diagram AT - 2ND . . . . . ...AT-129
A/T Wiring diagram AT - 3RD . . . . . ...AT-135
A/T Wiring diagram AT - 4TH. . . . . . AT-142
A/T Wiring diagram AT - BA/FTS . . . . ..AT-192
A/T Wiring diagram AT - LPSV . . . . . .AT-164
A/T Wiring diagram AT - NONDTC . . . ...AT-215
A/T Wiring diagram AT - OVRCSV . . . ...AT-187
A/T Wiring diagram AT - SSV/A . . . . . AT-169
A/T Wiring diagram AT - SSV/B . . . . . AT-173
A/T Wiring diagram AT - TCCSIG . . . . .AT-156
A/T Wiring diagram AT - TCV . . . . . ...AT-150
A/T Wiring diagram AT - TPS. . . . . . AT-179
A/T Wiring diagram AT - VSSMTR. . . . AT-199
AT/C - Wiring diagram. . . . . . . . ..EC-442
ATP switch. . . . . . . . . . . . . .TF-112
ATP warning lamp. . . . . . . . . . .TF-102
Audio . . . . . . . . . . . . . . . .EL-160
AUDIO - Wiring diagram . . . . . . . ...EL-162
Audio and A/C control removal and

installation - See Instrument panel . . . .BT-21

AUT/DP - Wiring diagram . . . . . . . .EL-191
Auto air conditioner - Wiring diagram . ..HA-31, 36
Automatic amplifier. . . . . . . . ...HA-40, 72
Automatic drive positioner . . . . . . . EL-186
Automatic speed control system - See

ASCD . . . . . . . . . . . . . . EL-221

Automatic transmission fluid

replacement. . . . . . . . . . . . MA-21

Automatic transmission number . . . . . ..GI-43
Auxiliary air control (AAC) valve . . . . ..EC-422
Axle housing (rear) . . . . . . . . . . .AX-19

B

Back door . . . . . . . . . . . . . . BT-15
Back door opener - See Back door . . . . BT-15
Back door trim. . . . . . . . . . . . .BT-34
Back-up lamp . . . . . . . . . . . . ..EL-69
BACK/L - Wiring diagram. . . . . . . . EL-69
Ball joint (front) . . . . . . . . . . . ...SU-12
Base idle air volume initialiging. . . . . ..EC-57
Basic inspection . . . . . . . . . . ...EC-101
Battery . . . . . . . . . . . . . . . ..SC-4
Battery/Starting/Charging System

Tester. . . . . . . . . . . . SC-7, 12, 21

Blower motor . . . . . . . . . . . . ..HA-95
Body alignment . . . . . . . . . . . ...BT-57
Brake booster . . . . . . . . . . . . .BR-19
Brake control valve (Proportioning

valve). . . . . . . . . . . . . . ...BR-11

ALPHABETICAL INDEX

IDX-2

Brake fluid change . . . . . . . . . . ...BR-7
Brake fluid level . . . . . . . . . . . .MA-25
Brake fluid level and line check . . . . . ...BR-7
Brake hydraulic line . . . . . . . . . . ..BR-9
Brake inspection . . . . . . . . . . . MA-25
Brake lines and cables inspection . . . . .MA-25
Brake lining wear temporary checking . . ..MA-26
Brake master cylinder . . . . . . . . . BR-16
Brake pedal . . . . . . . . . . . . . BR-14
Bulb specifications . . . . . . . . . . EL-456
Bumper, front . . . . . . . . . . . . ..BT-12
Bumper, rear . . . . . . . . . . . . ...BT-15
BYPS/V - Wiring diagram . . . . . EC-587, 594

C

Camshaft inspection . . . . . . . . . ..EM-42
Camshaft position sensor (PHASE) . . . .EC-342
Canister-See EVAP canister . . . . . . ..EC-32
Center bearing assembly (propeller

shaft) . . . . . . . . . . . . . . . .PD-9

Center bearing disassembly (propeller

shaft) . . . . . . . . . . . . . . . .PD-7

Center case (Transfer). . . . . . . . ..TF-123
CHARGE - Wiring diagram . . . . . . . SC-20
Charging system . . . . . . . . . . . SC-19
Chassis and body maintenance . . . . . MA-21
CHIME - Wiring diagram. . . . . . . ...EL-127
CIGAR - Wiring diagram . . . . . . . ...EL-148
Cigarette lighter. . . . . . . . . . . .EL-148
Circuit breaker. . . . . . . . . . . . .EL-16
CKPS - Wiring diagram . . . . . . . . EC-334
Closed loop control (Left bank) . . . . . EC-491
Closed loop control (Right bank) . . . . .EC-491
Closed throttle position switch . . . . . .EC-431
Clutch drum (Transfer). . . . . . . . ..TF-125
Clutch force release limit adjustment . . . .TF-39
Clutch pressure switch (Transfer) . . . . .TF-111
Coil spring (front). . . . . . . . . . . ..SU-8
Coil spring (rear) . . . . . . . . . . . SU-18
Collision diagnosis. . . . . . . . . . ..RS-59
Combination lamp, front, removal and

installation . . . . . . . . . . . . ...BT-12

Combination lamp, rear, removal and

installation . . . . . . . . . . . . ...BT-35

Combination meter. . . . . . . . . . ..EL-94
Combination meter removal and instal-

lation - See Instrument panel. . . . . ..BT-21

Combination switch . . . . . . . . . . .EL-28
COMPAS - Wiring diagram . . . . . . ...EL-111
Compass . . . . . . . . . . . . . ...EL-110
Component Location (auto A/C). . . . . .HA-27
Compression pressure . . . . . . . . ...EM-14
Compressor clutch removal and

installation . . . . . . . . . . . . .HA-150

Compressor precaution . . . . . . . . . HA-6
Compressor special service tool . . . . . HA-10
Connecting rod. . . . . . . . . . . ...EM-65
Connecting rod bearing clearance. . . . .EM-69
Connecting rod bushing clearance . . . . EM-70

Connector inspection . . . . . . . . . ...GI-21
Console box - See Instrument panel . . . ..BT-21
CONSULT for ABS . . . . . . . . . . .BR-43
CONSULT for all-mode 4WD. . . . . . ..TF-30
CONSULT for engine . . . . . . . . . .EC-81
CONSULT-II general information. . . . . .GI-38
Control valve (A/T) . . . . . . . . . . AT-301
Control valve (Transfer) . . . . . . . . TF-128
Converter housing installation. . . . . ...AT-278
Coolant mixture ratio. . . . . . . . . ..MA-12
Coolant replacement . . . . . . . . . ..MA-14
Cooling circuit (engine) . . . . . . . . ...LC-10
‘‘Crankcase emission control system -

See positive crankcase ventilation’’. . . EC-38

Crankshaft . . . . . . . . . . . . . ..EM-67
Crankshaft position sensor (POS) . . . ...EC-334
Crankshaft position sensor (POS)

chipping . . . . . . . . . . . . . EC-517

Crankshaft position sensor (REF) . . . . EC-510
Cruise control - See ASCD . . . . . . ...EL-221
Cylinder block . . . . . . . . . . . . EM-61
Cylinder head . . . . . . . . . . . . .EM-38
Cylinder head bolt tightening . . . . . . .EM-49

D

Data link connector for Consult. . . . . ..EC-81
Daytime light system. . . . . . . . . ...EL-46
Daytime running light - See Daytime

light system . . . . . . . . . . . . .EL-46

DEF - Wiring diagram . . . . . . . . ...EL-153
Detonation sensor - See Knock sensor . ...EC-328
Diagnostic trouble code (DTC) for OBD

system . . . . . . . . . . . . . EC-8, 60

Diagnostic trouble code (DTC) inspec-

tion priority chart . . . . . . . . . ...EC-116

Differential carrier assembly. . . . . .PD-30, 57
Differential carrier disassembly . . . . . ..PD-44
Differential gear oil replacement . . . . . MA-24
Dimensions . . . . . . . . . . . . . ..GI-43
D/LOCK - Wiring diagram . . . . . . . .EL-256
Dome light - See Interior lamp . . . . . ...EL-88
Door glass . . . . . . . . . . . . . ...BT-18
Door lock . . . . . . . . . . . . . . .BT-18
Door mirror . . . . . . . . . . . . . ..BT-56
Door trim . . . . . . . . . . . . . . .BT-30
Door, front . . . . . . . . . . . . . ...BT-18
Door, rear . . . . . . . . . . . . . . BT-20
Drive belt inspection . . . . . . . . . ..MA-13
Drive chain (Transfer) . . . . . . . . ...TF-125
Drive pinion diff. inspection . . . . . ..PD-23, 47
Drive pinion height . . . . . . . . ...PD-25, 53
Drive plate runout . . . . . . . . . . ..EM-70
Drive shaft (front). . . . . . . . . . . AX-10
Dropping resistor (A/T). . . . . . . . ..AT-167
DTC work support . . . . . . . . . . ..EC-93
DTRL - Wiring diagram . . . . . . . . ...EL-51

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

ALPHABETICAL INDEX

IDX-3

E

ECM input/output signal . . . . . . . ...EC-127
ECTS - Wiring diagram . . . . . . EC-171, 189
Electric sun roof . . . . . . . . . . . EL-173
Electrical diagnoses. . . . . . . . . . .GI-24
Electrical ignition system . . . . . . . . EC-30
Electrical unit . . . . . . . . . . . . Foldout
Electrical units location . . . . . . . . .EL-436
Engine compartment . . . . . . . . . ...BT-58
Engine control circuit diagram. . . . . . EC-24
Engine control component parts

location . . . . . . . . . . . . . ...EC-20

Engine control module (ECM) . . . . . ..EC-444
Engine control system diagram and

chart . . . . . . . . . . . . . . . EC-25

Engine coolant temperature sensor

(ECTS). . . . . . . . . . . ..EC-169, 187

Engine fail-safe system . . . . . . . . EC-117
Engine oil filter replacement . . . . . . ..MA-18
Engine oil precautions . . . . . . . . . ...GI-8
Engine oil replacement . . . . . . . . ..MA-18
Engine outer component parts . . . . . ..EM-10
Engine removal . . . . . . . . . . . ..EM-57
Engine room - See Engine

compartment. . . . . . . . . . . . BT-58

Engine serial number . . . . . . . . . ..GI-43
EVAP canister. . . . . . . . . . . . .EC-33
EVAP canister purge volume control

solenoid valve. . . . . . . .EC-32, 367, 541

EVAP canister vent control

valve . . . . . . . . . . .EC-374, 553, 573

EVAP control system (small leak)

diagnosis . . . . . . . . ..EC-352, 394, 526

EVAP control system pressure sensor. . .EC-381
EVAP control system purge flow moni-

toring diagnosis. . . . . . . . . . .EC-561

EVAP vapor lines inspection. . . . . . ..MA-20
Evaporative emission (EVAP) system. . . EC-32
Exhaust system . . . . . . . . . . . . FE-8
Exhaust system inspection . . . . . . . MA-21
Exterior . . . . . . . . . . . . . . . BT-35

F

4LO indicator lamp. . . . . . . . . . TF-104
4WD shift indicator lamp. . . . . . . . .TF-98
4WD shift switch. . . . . . . . . . . TF-111
4WD solenoid valve. . . . . . . . . ...TF-111
4WD warning lamp . . . . . . . . . . .TF-13
Fan control amp. . . . . . . . . . . . HA-98
F/FOG - Wiring diagram . . . . . . . . .EL-72
Final drive disassembly . . . . . . . . ..PD-43
Final drive pre-inspection . . . . . . . ...PD-43
Final drive removal and installation . . . ...PD-43
Finisher, interior - See Trim . . . . . . . BT-28
F/LID - Wiring diagram . . . . . . . . .EL-180
Fluid temperature sensor (A/T) . . . . . .AT-110

Fluids . . . . . . . . . . . . . . . ..MA-11
Flywheel runout. . . . . . . . . . . ..EM-70
FO2H-L - Wiring diagram . . . . . . . .EC-243
FO2H-R - Wiring diagram . . . . . . . EC-242
Fog lamp, front. . . . . . . . . . . . EL-70
Fog lamp, front, removal and

installation . . . . . . . . . . . . ...BT-12

Forward clutch. . . . . . . . . . . ...AT-320
F/PUMP - Wiring diagram . . . . . . . EC-627
Freeze frame data . . . . . . . . . . ..EC-60
FRO2LH - Wiring diagram . . ...EC-197, 223, 235
FRO2RH - Wiring diagram. . ...EC-196, 222, 234
Front axle. . . . . . . . . . . . . . ..AX-2
Front bumper . . . . . . . . . . . . ..BT-12
Front case (Transfer) . . . . . . . . . TF-133
Front combination lamp removal and

installation . . . . . . . . . . . . ...BT-12

Front disc brake . . . . . . . . . . . .BR-22
Front door . . . . . . . . . . . . . ...BT-18
Front drive shaft (Transfer) . . . . . . ...TF-125
Front final drive disassembly (4WD) . . . ..PD-18
Front final drive pre-inspection (4WD) . . ...PD-18
Front final drive removal and installa-

tion (4WD). . . . . . . . . . . . ...PD-18

Front fog lamp. . . . . . . . . . . . .EL-70
Front fog lamp removal and installation . . .BT-12
Front heated oxygen sensor (HO2S)

(Left bank). . . . EC-192, 202, 210, 218, 231

Front heated oxygen sensor (HO2S)

(Right bank) . . . .EC-192, 202, 210, 218, 231

Front heated oxygen sensor heater

(Left bank). . . . . . . . . . . . .EC-240

Front heated oxygen sensor heater

(Right bank) . . . . . . . . . . . ..EC-240

Front revolution sensor (Transfer) . . . . TF-112
Front seat . . . . . . . . . . . . . . BT-41
Front seat belt . . . . . . . . . . . . ..RS-4
Front suspension . . . . . . . . . . . ..SU-2
Front washer . . . . . . . . . . . . .EL-136
Front wiper . . . . . . . . . . . . . EL-136
Fuel cut control (at no load & high

engine speed) . . . . . . . . . . . .EC-32

Fuel filler lid. . . . . . . . . . . . . .BT-15
Fuel filter replacement . . . . . . . . ...MA-16
Fuel gauge . . . . . . . . . . . . . ..EL-94
Fuel injection system (Left bank) . . .EC-294, 302
Fuel injection system (Right bank) . ..EC-294, 302
Fuel lid opener, electric. . . . . . . . .EL-180
Fuel line inspection . . . . . . . . . . MA-16
Fuel precautions . . . . . . . . . . . . GI-8
Fuel pressure check . . . . . . . . . ...EC-39
Fuel pressure regulator . . . . . . . . ..EC-40
Fuel pressure release . . . . . . . . . EC-39
Fuel pump . . . . . . . . . . . . . EC-625
Fuel system . . . . . . . . . . . . . ..FE-4
Fuel tank temperature sensor . . . . . ..EC-309
Fuel tank vacuum relief valve . . . . . . EC-33
FUELLH - Wiring diagram. . . . . EC-297, 305
FUELRH - Wiring diagram . . . . ...EC-296, 304
Fuse . . . . . . . . . . . . . . . . EL-16
Fuse block . . . . . . . . . . . . . Foldout

ALPHABETICAL INDEX

IDX-4

Fusible link . . . . . . . . . . . . . ..EL-16

G

Garage jack and safety stand . . . . . . .GI-46
Gauges. . . . . . . . . . . . . . . EL-94
Generator - See Alternator . . . . . . . .SC-28
Generic scan tool (GST) . . . . . . . . EC-95
Glass . . . . . . . . . . . . . . . ...BT-18
Glass hatch opener, electric . . . . . . .EL-178
Grease. . . . . . . . . . . . . . . MA-11
Ground distribution. . . . . . . . . . ..EL-17

H

Harness connector . . . . . . . . . . . EL-5
Harness connector inspection . . . . . . .GI-21
Harness layout . . . . . . . . . . . ..EL-440
Hazard warning lamp . . . . . . . . . ..EL-75
Headlamp . . . . . . . . . . . . . . EL-31
Headlamp aiming control . . . . . . . . EL-59
Headlining - See Roof trim . . . . . . . .BT-32
Heated seat . . . . . . . . . ...BT-43, EL-183
Height (Dimensions) . . . . . . . . . . GI-43
HFC134a (R134a) system precaution . . . .HA-2
HFC134a (R134a) system service

procedure. . . . . . . . . . . . ..HA-144

HFC134a (R134a) system service tools . . HA-11
HFC134a system service equipment

precaution . . . . . . . . . . . . . .HA-7

High clutch. . . . . . . . . . . . . .AT-317
H/LAMP - Wiring diagram . . . . . . . ...EL-36
Hood. . . . . . . . . . . . . . . . BT-12
Horn . . . . . . . . . . . . . . . ..EL-147
HORN - Wiring diagram. . . . . . . . EL-147
How to erase DTC for OBD system. . . ...EC-72
HSEAT - Wiring diagram. . . . . . . ...EL-183

I

IACV-AAC valve . . . . . . . . . . ...EC-422
IATS - Wiring diagram . . . . . . . . ..EC-166
Identification . . . . . . . . . . . . . .HA-4
Identification plate. . . . . . . . . . . GI-42
Idle air control valve (IACV) . . . . . . .EC-422
Idle mixture ratio. . . . . . . . . . . .EC-43
Idle speed . . . . . . . . . . . . . ...EC-43
IGN/SG - Wiring diagram . . . . . . . .EC-501
Ignition control system . . . . . . . . .EC-499
Ignition timing . . . . . . . . . . . . .EC-43
ILL - Wiring diagram . . . . . . . . . ...EL-83
Illumination . . . . . . . . . . . . . ..EL-80
In vehicle sensor . . . . . . . . . . ..HA-132
INFINITI COMMUNICATOR. . . . . . ..EL-348
Infiniti communicator (IVCS) . . . . . . .EL-348
INJECT - Wiring diagram . . . . . . . .EC-617
Injector . . . . . . . . . . . . . . ..EC-616

Injector removal and installation . . . . . EC-41
Instrument panel . . . . . . . . . . . .BT-21
INT/L - Wiring diagram. . . . . . . . . EL-91
Intake air temparature sensor . . . . . ..EC-164
Intake door control linkage adjustment . . ..HA-94
Intake door motor . . . . . . . . . . ...HA-87
Intake manifold. . . . . . . . . . . ...EM-12
Intake sensor . . . . . . . . . . . . HA-139
Integrated homelink transmitter . . . . . EL-325
Interior . . . . . . . . . . . . . . . .BT-28
Interior lamp . . . . . . . . . . . . . EL-88
Interior lamp on-off control. . . . . . . ..EL-89
Internal gear (Transfer) . . . . . . . . .TF-134
IVC-L - Wiring diagram. . . . . . . . .EC-453
IVC-R - Wiring diagram . . . . . . . . EC-453
IVCS - Wiring diagram . . . . . . . . ..EL-359
IVCS-L - Wiring diagram . . . . . . . ..EC-485
IVCS-R - Wiring diagram . . . . . . . .EC-485
IVIS (Infiniti vehicle immobilizer

system) . . . . . . . . . . . . . ..EL-328

IVIS (Infiniti vehicle immobilizer sys-

tem) precautions . . . . . . . . . . . GI-3

J

Jacking points . . . . . . . . . . . . ..GI-45
Journal bearing assembly (propeller

shaft) . . . . . . . . . . . . . . . .PD-9

Journal bearing disassembly (propeller

shaft) . . . . . . . . . . . . . . . .PD-8

Junction box (J/B). . . . . . . . . . .Foldout

K

Keyless entry system - See Multi-re-

mote control system . . . . . . . . ..EL-270

Knock sensor (KS) . . . . . . . . . ...EC-328
Knuckle spindle . . . . . . . . . . . . AX-9
KS - Wiring diagram . . . . . . . . . .EC-330

L

Length (Dimensions) . . . . . . . . . ...GI-43
License lamp . . . . . . . . . . . . ...EL-61
Lifting points . . . . . . . . . . . . . GI-47
Limited slip diff. adjustment. . . . . . . PD-50
Limited slip diff. assembly . . . . . . . ..PD-51
Limited slip diff. disassembly. . . . . . ..PD-48
Limited slip diff. inspection . . . . . . . .PD-49
Line pressure solenoid valve . . AT-147, 161, 167
Line pressure switch (Transfer). . . . . .TF-111
Line pressure test (A/T) . . . . . . . . ..AT-62
Liquid gasket application . . . . . . . . .EM-3
LOAD - Wiring diagram . . . . . . . . EC-643
Location of electrical units . . . . . . . EL-436
Lock, door . . . . . . . . . . . . . ...BT-18
Low and reverse brake . . . . . . . . .AT-324

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

EL

ALPHABETICAL INDEX

IDX-5