tow INFINITI QX4 2001 Factory Owner's Manual

SGI949
VEHICLE RECOVERYNBGI0008S0401IUse the towinghookonly, not other parts of the vehicle.
Otherwise, the vehicle body will be damaged.
IUse the towing hookonlyto free a vehicle stuck in sand, snow,
mud, etc.Nevertow the vehicle for a long distance using only
the towing hook.
IThe towing hook is under tremendous force when used to free
a stuck vehicle. Always pull the cable straight out from the front
or rear of the vehicle.Neverpull on the hook at a sideways
angle.
IStand clear of a stuck vehicle.
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LIFTING POINTS AND TOW TRUCK TOWING
Tow Truck Towing (Cont'd)
GI-49

S/VCSW - Wiring diagram ...........................EC-493
Swirl control valve control solenoid
valve .........................................................EC-458
Swirl control valve control vacuum
check switch .............................................EC-493
SWL/V - Wiring diagram ..............................EC-458
Symbols and abbreviations .............................GI-10
Symptom matrix chart...................................EC-118
System readiness test (SRT) code ................EC-61
T
2-4WD shift solenoid valve............................TF-111
Tachometer .....................................................EL-94
Tail lamp ..........................................................EL-61
TAIL/L - Wiring diagram ..................................EL-63
TCM circuit diagram ........................................AT-13
TCM inspection table ......................................AT-92
TFTS - Wiring diagram .................................EC-311
THEFT - Wiring diagram ...............................EL-300
Theft warning system....................................EL-294
Thermometer .................................................EL-110
Thermostat ......................................................LC-16
Three way catalyst function (Left bank) .......EC-347
Three way catalyst function (Right
bank) .........................................................EC-347
Three way catalyst precautions.........................GI-6
Throttle bodies ...............................................EM-12
Throttle position sensor (TPS) .....................EC-174
Throttle position sensor adjustment .............EC-101
Throttle position switch ...........EC-431, AT-184, 264
Tie-rod .............................................................ST-21
Tie-rod ball joints.............................................ST-21
Tightening torque of standard bolts.................GI-50
Timing chain ...................................................EM-20
Tire rotation ....................................................MA-24
Tire size ...........................................................GI-44
TLID - Wiring diagram ..................................EL-179
Tooth contact (front final drive 4WD) .............PD-29
Tooth contact diff. ...........................................PD-56
Torque converter installation .........................AT-278
Torque convertor clutch solenoid
valve ..................................................AT-152, 161
Tow truck towing ..............................................GI-47
Towing point.....................................................GI-49
TP/SW - Wiring diagram ..............................EC-434
TPS - Wiring diagram...................................EC-180
Transfer control unit inspection table..............TF-55
Transfer dropping resistor .............................TF-112
Transfer fluid replacement (Part time
4WD model) ...............................................MA-22
Transfer fluid temperature sensor .................TF-111
Transfer motor ...............................................TF-117
Transfer motor relay ......................................TF-113
Transfer serial number ....................................GI-43
TRANSMT - Wiring diagram .........................EL-325
Tread-FR&RR (Dimensions)............................GI-43
Trim .................................................................BT-28
Trouble diagnoses ...........................................GI-34
Trunk lid opener, electric...............................EL-178Turbine revolution sensor..............................AT-202
TURN - Wiring diagram ..................................EL-77
Turn signal lamp .............................................EL-75
Two trip detection logic ..................................EC-59
Two-pole lift .....................................................GI-47
U
Under body .....................................................BT-60
V
Vacuum cut valve ...........................................EC-32
Vacuum cut valve bypass valve.....EC-32, 585, 591
Vacuum hose (brake system).........................BR-21
Vacuum hose drawing (Engine control) .........EC-26
Valve clearance ..............................................EM-52
Valve guide.....................................................EM-43
Valve seat.......................................................EM-45
Valve spring....................................................EM-46
Vehicle identification number...........................GI-42
Vehicle recovery (freeing a stuck
vehicle) .........................................................GI-49
Vehicle speed sensor (VSS) ........................EC-417
VENT/V - Wiring diagram ............EC-376, 555, 576
Ventilation air filter ........................................HA-159
VIAS .............................................................EC-610
VIAS - Wiring diagram .................................EC-610
Viscosity number (SAE) .................................MA-12
VSS - Wiring diagram ..................................EC-420
W
Wait detection switch ....................................TF-112
WARN - Wiring diagram................................EL-115
Warning chime ..............................................EL-125
Warning lamps ..............................................EL-114
Washer, front .................................................EL-136
Washer, rear..................................................EL-141
Water pump ....................................................LC-12
Water temperature gauge ...............................EL-94
Weatherstrip - See Exterior ............................BT-35
Wheel balance ...............................................MA-24
Wheel bearing (front)........................................AX-4
Wheel bearing (rear) ......................................AX-18
Wheel hub (front)..............................................AX-6
Wheel sensors (ABS)...............................BR-56, 80
Wheel size .......................................................GI-44
Wheelarch height .............................................SU-5
Wheelbase (Dimensions) ................................GI-43
Wide open & closed throttle position
switch ........................................................EC-174
Width (Dimensions) .........................................GI-43
WINDOW - Wiring diagram ..........................EL-245
Window, door ..................................................BT-18
Window, rear side ...........................................BT-55
Window, side - See Rear side window ...........BT-55
ALPHABETICAL INDEX
IDX-8

NBMA0004
Two different maintenance schedules are provided, and should be used, depending upon the conditions in
which the vehicle is mainly operated.After 60,000 miles (96,000 km) or 48 months, continue the periodic
maintenance at the same mileage/time intervals.
Schedule 1Follow Periodic Maintenance Schedule 1 if your driving habits frequently
includes one or more of the following driving conditions:
IRepeated short trips of less than 5 miles (8 km).
IRepeated short trips of less than 10 miles (16 km) with outside tempera-
tures remaining below freezing.
IOperating in hot weather in stop-and-go ªrush hourº traffic.
IExtensive idling and/or low speed driving for long distances, such as police,
taxi or door-to-door delivery use.
IDriving in dusty conditions.
IDriving on rough, muddy, or salt spread roads.
ITowing a trailer, using a camper or a car-top carrier.Emission Control Sys-
tem Maintenance
MA-7
Chassis and Body
Maintenance
MA-8
Schedule 2Follow Periodic Maintenance Schedule 2 if none of the driving conditions
shown in Schedule 1 apply to your driving habits.Emission Control Sys-
tem MaintenanceMA-9
Chassis and Body
MaintenanceMA-10
Maintenance for off-road driving
Whenever you drive off-road through sand, mud or water, more frequent maintenance may be required of the
following items:
GBrake pads and rotors
GBrake lining and drums
GBrake lines and hoses
GWheel bearing grease
GDifferential, transmission and transfer oil
GSteering linkage
GPropeller shaft and drive shafts
GAir cleaner filter
PERIODIC MAINTENANCE
MA-6

CHASSIS AND BODY MAINTENANCENBMA0004S0102
Abbreviations: R = Replace. I = Inspect. Correct or replace if necessary. L = Lubricate
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Reference
Section
- Page or
- Content Title Perform at number of miles, kilo-
meters or months, whichever
comes first.Miles x 1,000
(km x 1,000)
Months3.75
(6)
37.5
(12)
611.25
(18)
915
(24)
1218.75
(30)
1522.5
(36)
1826.25
(42)
2130
(48)
2433.75
(54)
2737.5
(60)
3041.25
(66)
3345
(72)
3648.75
(78)
3952.5
(84)
4256.25
(90)
4560
(96)
48
Brake lines & cables I I I I MA-25
Brake pads, rotors, drums & linings I IIIIIIIMA-25, 26
Automatic transmission & all-mode
4WD transfer fluid & differential
gear oil (exc. LSD)NOTE (1) I I I I MA-21, 22, 23
LSD gear oil NOTE (1) I R I R MA-24
Steering gear, linkage & transfer
gear, axle & suspension partsIIIIIIIIMA-26
NOTE (6)
Tire rotation NOTE (2)MA-4
Drive shaft boots (
) IIIIIIIIAX-10, ªDrive
Shaftº
Propeller shaft NOTE (3) L LLLLLLLMA-23
Front wheel bearing grease (4x2) I I
Front wheel bearing
grease (
)NOTE (4) I R I RAX-4, ªFront
Wheel Bearingº
Exhaust system I IIIIIIIMA-21
Supplemental air bag systems NOTE (5)RS-14, ªMainte-
nance Itemsº
Ventilation air filter I RIRIRIRHA-159, ªVentila-
tion Air Filterº
ASCD vacuum hoses I I I IEL-237, ªASCD
ACTUATOR/
PUMP CHECKº
NOTE:
(1) If towing a trailer, using a camper or a car-top carrier, or driving on rough or muddy roads, change (not just inspect) fluid (A/T, all mode 4WD transfer)/differential gear oil (exc.
LSD) at every 30,000 miles (48,000 km) or 24 months, and change LSD gear oil every 15,000 miles (24,000 km) or 12 months.
(2) Refer to ªTire rotationº under the ªGENERAL MAINTENANCEº heading earlier in this section.
(3) The propeller shaft should be re-greased after being immersed in water.
(4) If operating frequently in water, replace grease every 3,750 miles (6,000 km) or 3 months.
(5) Inspect the air bag system 10 years after the date of manufacture noted on the FMVSS certification label.
(6) Refer to SU-5, ªFront Suspension Partsº and SU-16, ªRear Suspension Partsº, AX-3, ªFront Axle Partsº and AX-18, ªRear Axle Partsº.
PERIODIC MAINTENANCE
Schedule 1 (Cont'd)
MA-8

5. Turn ignition switch ªOFFº.
SMA861C
6. Loosen fuel hose clamps.
7. Replace fuel filter.
IBe careful not to spill fuel over engine compartment. Place
a shop towel to absorb fuel.
IUse a high-pressure type fuel filter. Do not use a synthetic
resinous fuel filter.
IWhen tightening fuel hose clamps, refer to ªChecking Fuel
Linesº.
SMA869C
WITHOUT CONSULT-IINBMA0013S021. Remove fuel pump fuse located in fuse box.
2. Start engine.
3. After engine stalls, crank it two or three times to release all fuel
pressure.
4. Turn ignition switch ªOFFº and install fuel pump fuse.
SMA861C
5. Loosen fuel hose clamps.
6. Replace fuel filter.
IBe careful not to spill fuel over engine compartment. Place
a shop towel to absorb fuel.
IUse a high-pressure type fuel filter. Do not use a synthetic
resinous fuel filter.
IWhen tightening fuel hose clamps, refer to ªChecking Fuel
Linesº.
SMA095D
Changing Air Cleaner FilterNBMA0014VISCOUS PAPER TYPENBMA0014S01The viscous paper type filter does not need cleaning between
replacement intervals.
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ENGINE MAINTENANCE
Changing Fuel Filter (Cont'd)
MA-17

SPD131
4. Remove bearing at opposite side in above operation.
Put marks on disassembled parts so that they can be rein-
stalled in their original positions from which they were
removed.
SPD114
AssemblyNBPD0008CENTER BEARING Ð 2WD ÐNBPD0008S03IWhen installing center bearing, position the ªFº mark on cen-
ter bearing toward front of vehicle.
IApply a coat of multi-purpose lithium grease containing
molybdenum disulfide to the end face of the center bear-
ing and both sides of the washer.
SPD117
IStake the nut. Always use new one.
IAlign match marks when assembling tubes.
SPD133
JOURNAL (71H AND 80B)NBPD0008S021. Assemble journal bearing. Apply recommended multi-purpose
grease on bearing inner surface.
When assembling, be careful that needle bearing does not fall
down.
SPD134
2. Select snap ring that will provide specified play in axial direc-
tion of journal, and install them.
Refer to SDS, PD-11.
Select snap rings with a difference in thickness at both sides
within 0.06 mm (0.0024 in).
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PROPELLER SHAFT
Disassembly (Cont'd)
PD-9

Front Seat Belt
REMOVAL AND INSTALLATION=NBRS00031. Slide the seat all the way forward and tilt the seatback toward the front.
2. Remove adjuster cover.
3. Remove floor anchor bolt.
4. Remove shoulder anchor bolt.
5. Remove center pillar upper and lower garnish. Refer to BT-28, ªSIDE AND FLOOR TRIMº for details.
6. Disconnect seat belt pre-tensioner connector.
7. Remove the bolt securing seat belt retractor, then remove seat belt and seat belt retractor.
8. Remove bolts securing seat belt adjuster, then remove seat belt adjuster.
SRS873
SEAT BELTS
Front Seat Belt
RS-4

Precautions
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) ªAIR BAGº AND ªSEAT BELT
PRE-TENSIONERº
NBRS0005The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS composition which is available to INFINITI QX4 is as follows:
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
IFor a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness,
warning lamp (one of components of air bags for a frontal collision).
WARNING:
ITo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized INFINITI dealer.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
PRECAUTIONS FOR SRS ªAIR BAGº AND ªSEAT BELT PRE-TENSIONERº SERVICENBRS0006IDo not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
IBefore servicing the SRS, turn ignition switch ªOFFº, disconnect both battery cables and wait at least 3
minutes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt
pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.
IDiagnosis sensor unit must always be installed with their arrow marks ªgº pointing towards the front of
the vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before
installation and replace as required.
IThe spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or column after removal of steering gear.
IHandle air bag module carefully. Always place driver and passenger air bag modules with the pad side
facing upward and side air bag module (built-in type) standing with the stud bolt side setting bottom.
IConduct self-diagnosis to check entire SRS for proper function after replacing any components.
IAfter air bag inflates, the front instrument panel assembly should be replaced if damaged.
WIRING DIAGRAMS AND TROUBLE DIAGNOSISNBRS0007When you read wiring diagrams, refer to the following:
IGI-11, ªHOW TO READ WIRING DIAGRAMSº
IEL-9, ªPOWER SUPPLY ROUTINGº for power distribution circuit
When you perform trouble diagnosis, refer to the following:
IGI-35, ªHOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSESº
IGI-24, ªHOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENTº
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Precautions
RS-10

Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
NBST0044The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to INFINITI QX4 is as follows:
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
IFor a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one of components of air bags for a frontal collision), wiring harness,
warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
ITo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized INFINITI dealer.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
Precautions for Steering SystemNBST0002IBefore disassembly, thoroughly clean the outside of the unit.
IDisassembly should be done in a clean work area. It is important to prevent the internal parts from
becoming contaminated by dirt or other foreign matter.
IPlace disassembled parts in order, on a parts rack, for easier and proper assembly.
IUse nylon cloths or paper towels to clean the parts; common shop rags can leave lint that might
interfere with their operation.
IBefore inspection or reassembly, carefully clean all parts with a general purpose, non-flammable
solvent.
IBefore assembly, apply a coat of recommended power steering fluid* to hydraulic parts. Vaseline
may be applied to O-rings and seals. Do not use any grease.
IReplace all gaskets, seals and O-rings. Avoid damaging O-rings, seals and gaskets during instal-
lation. Perform functional tests whenever designated.
*: Genuine Nissan PSF II or equivalent. Refer to MA-11, ªFluids and Lubricantsº.
PRECAUTIONS
Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
ST-2

DisassemblyNBST0034CAUTION:
IParts which can be disassembled are strictly limited.
Never disassemble parts other than those specified.
IDisassemble in as clean a place as possible.
IClean your hands before disassembly.
IDo not use rags; use nylon cloths or paper towels.
IFollow the procedures and cautions in the Service
Manual.
IWhen disassembling and reassembling, do not let foreign
matter enter or contact the parts.
1. Fix power steering pump to vise.
CAUTION:
When fixing the pump to vise, use an aluminum plate or such
to avoid damaging the fitting plane of the steering pump.
2. Remove the front bracket mounting bolt, and remove the front
bracket from the casing.
3. Remove the rear cover mounting bolt, and remove the rear
cover from the casing.
4. Remove the O-ring from the casing.
SST926C
5. Remove side plate (rear side) from cam ring, then remove side
plate inner/outer seals from side plate (rear side).
6. Remove rotor snap ring using snap ring pliers, and remove
pulley from casing.
CAUTION:
Do not damage pulley shaft when removing rotor snap ring.
SST928C
7. Remove the followings from casing.
ICam ring
IRotor
IVane
ISide plate (front side)
IFlow control A valve
IFlow control valve spring
IFlow control B valve assembly
CAUTION:
Be careful not to drop flow control valve.
8. Remove inlet connector mounting bolt, and remove inlet con-
nector from casing.
9. Remove inlet connector seal from inlet connector.
10. Remove drive shaft seal from casing with a screwdriver.
CAUTION:
Do not damage casing surface with the screwdriver.
POWER STEERING OIL PUMP
Disassembly
ST-28