clutch INFINITI QX4 2001 Factory Service Manual

10 CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP.
Check circuit continuity between ECM harness terminal No. 51 and auto amp. harness terminal No. 6 (17).
RHA879H
Continuity should exist.
If OK, check harness for short.
OK or NG
OK©Replace auto amp.
NG©1. Repair harness or connector.
2. Go to ªSTEP-BY-STEP PROCEDUREº, ªSelf-diagnosisº, HA-45 and perform self-diag-
nosis STEP 4.
Confirm that magnet clutch operation is normal.
11 CHECK CIRCUIT CONTINUITY BETWEEN A/C RELAY AND ECM
Check circuit continuity between A/C relay harness terminal No. 1 and ECM harness terminal No. 27.
RHA474GB
Continuity should exist.
OK or NG
OK©Check harness for short.
NG©Repair harness or connector.
SEF090M
COMPONENT INSPECTIONNBHA0068A/C RelayNBHA0068S01Check continuity between terminal Nos. 3 and 5.
Conditions Continuity
12V direct current supply between terminal Nos. 1 and 2 Yes
No current supply No
If NG, replace relay.
TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-110

RHA880H
SHA315F
Refrigerant Pressure SensorNBHA0068S02Make sure that higher A/C refrigerant pressure results in higher
refrigerant-pressure sensor output voltage.
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TROUBLE DIAGNOSES
Magnet Clutch (Cont'd)
HA-111

Compressor Clutch
OVERHAULNBHA0073
RHA122F
RHA136EB
REMOVALNBHA0074IWhen removing center bolt, hold clutch disc with clutch disc
wrench.
RHA399F
RHA124F
IRemove the clutch disc using the clutch disc puller.
Insert the holder's three pins into the holes in the clutch disc.
Rotate the holder clockwise to hook it onto the plate. Then,
tighten the center bolt to remove the clutch disc.
After removing the clutch disc, remove the shims from either
the drive shaft or the clutch disc.
SERVICE PROCEDURE
Compressor Clutch
HA-150

RHA138E
IRemove the snap ring using external snap ring pliers.
RHA139E
IPulley removal
Position the center pulley puller on the end of the drive shaft,
and remove the pulley assembly using any commercially avail-
able pulley puller.
To prevent the pulley groove from being deformed, the
puller claws should be positioned onto the edge of the
pulley assembly.
RHA125F
IRemove the field coil harness clip using a pair of pliers.
RHA145E
IRemove the snap ring using external snap ring pliers.
RHA126F
INSPECTIONNBHA0075Clutch DiscNBHA0075S01If the contact surface shows signs of damage due to excessive
heat, replace clutch disc and pulley.
PulleyNBHA0075S02Check the appearance of the pulley assembly. If the contact sur-
face of pulley shows signs of excessive grooving, replace clutch
disc and pulley. The contact surfaces of the pulley assembly should
be cleaned with a suitable solvent before reinstallation.
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SERVICE PROCEDURE
Compressor Clutch (Cont'd)
HA-151

CoilNBHA0075S03Check coil for loose connection or cracked insulation.
RHA142E
INSTALLATIONNBHA0076IInstall the field coil.
Be sure to align the coil's pin with the hole in the com-
pressor's front head.
IInstall the field coil harness clip using a screwdriver.
RHA143EA
IInstall the pulley assembly using the installer and a hand
press, and then install the snap ring using snap ring pliers.
RHA127F
IInstall the clutch disc on the drive shaft, together with the
original shim(s). Press the clutch disc down by hand.
RHA086E
IUsing the holder to prevent clutch disc rotation, tighten the bolt
to 14 N´m (1.4 kg-m, 10 ft-lb) torque.
After tightening the bolt, check that the pulley rotates
smoothly.
SERVICE PROCEDURE
Compressor Clutch (Cont'd)
HA-152

RHA087E
ICheck clearance around the entire periphery of clutch disc.
Disc-to-pulley clearance:
0.3 - 0.6 mm (0.012 - 0.024 in)
If the specified clearance is not obtained, replace adjusting
spacer and readjust.
Break-in OperationNBHA0076S01When replacing compressor clutch assembly, always carry out the
break-in operation. This is done by engaging and disengaging the
clutch about thirty times. Break-in operation raises the level of
transmitted torque.
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SERVICE PROCEDURE
Compressor Clutch (Cont'd)
HA-153

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-101A/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-70Connector 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
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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-110Fluids ..............................................................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-616Injector 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
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ALPHABETICAL INDEX
IDX-5