INSTALLATION INFINITI QX4 2001 Factory Service Manual

ComponentsNBST0016
SST843C
1. Air bag module
2. Steering wheel3. Spiral cable
4. Combination switch5. Steering column assembly
6. Column cover
CAUTION:
IThe rotation of the spiral cable (SRS ªAIR BAGº compo-
nent part) is limited. If the steering gear must be removed,
set the front wheels in the straight-ahead direction. Do not
rotate the steering column while the steering gear is
removed.
IRemove the steering wheel before removing the steering
lower joint to avoid damaging the SRS spiral cable.
SBF812E
Removal and InstallationNBST0017STEERING WHEELNBST0017S011. Remove air bag module and spiral cable. Refer to RS-17,
ªRemoval Ð Air Bag Module and Spiral Cableº.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
STEERING WHEEL AND STEERING COLUMN
Components
ST-11

SRS266
2. Align spiral cable correctly when installing steering wheel.
a. Set the front wheels in the straight-ahead position.
b. Make sure that the spiral cable is in the neutral position.
The neutral position is detected by turning left about 2.5 revo-
lutions from the right end position. Align the two marks (
).
CAUTION:
IThe spiral cable may snap due to steering operation if the
cable is installed in an improper position.
IAlso, with the steering linkage disconnected, the cable
may snap by turning the steering wheel beyond the limited
number of turns. The spiral cable can be turned to the left
about 2.5 turns from the right end position.
SST818C
3. Remove steering wheel with Tool.
SST329C
4. Remove key interlock cable.
SST844C
STEERING COLUMNNBST0017S02IWhen installing steering column, fingertighten all lower bracket
and clamp retaining bolts; then tighten them securely. Do not
apply undue stress to steering column.
IWhen attaching coupling joint, be sure tightening bolt faces
cutout portion.
STEERING WHEEL AND STEERING COLUMN
Removal and Installation (Cont'd)
ST-12

SST847C
InstallationNBST00221. Set wheels in the straight-ahead position.
2. Install transfer gear assembly.
3. Install column lower joint while aligning groove with protrusions
on the steering gear rear cover cap.
4. Tighten bolt while aligning groove on steering gear. Before
tightening bolt, ensure it is inserted correctly.
SST848C
5. When attaching steering column upper and lower joint to trans-
fer gear, it must be positioned as shown in figure at left.
SST707CA
InspectionNBST0024Do not disassemble steering transfer gear assembly.
ICheck that steering transfer gear assembly operates smoothly.
Also check for grease leakage, deformation and damage.
Replace steering transfer gear assembly if necessary.
ICheck rotating torque at input shaft in 360É and in both direc-
tions.
Rotating torque:
0.25 - 0.69 N´m (2.5 - 7.0 kg-cm, 2.2 - 6.1 in-lb)
If rotating torque is out of specification, replace steering trans-
fer gear assembly.
STEERING TRANSFER GEAR
Installation
ST-16

Removal and InstallationNBST0027
SST614C
1. Gear and linkage assembly
2. Rack mounting insulator3. Gear housing mounting bracket 4. Cotter pin
SFA756B
CAUTION:
IThe rotation of the spiral cable (SRS ªAIR BAGº compo-
nent part) is limited. If the steering gear must be removed,
set the front wheels in the straight-ahead direction. Do not
rotate the steering column while the steering gear is
removed.
IRemove the steering wheel before removing the steering
lower joint to avoid damaging the SRS spiral cable.
IDetach tie-rod outer sockets from knuckle arms with Tool.
SST615C
IInstall pipe connector.
IObserve specified tightening torque when tightening high-pres-
sure and low-pressure pipe connectors. Excessive tightening
will damage threads of connector or O-ring.
Connector tightening torque:
Low-pressure side ª1º
30 - 35 N´m (3.1 - 3.6 kg-m, 22 - 26 ft-lb)
High-pressure side ª2º
30 - 35 N´m (3.1 - 3.6 kg-m, 22 - 26 ft-lb)
IThe O-ring in low-pressure pipe connector is larger than that
POWER STEERING GEAR AND LINKAGE
Removal and Installation
ST-18

in high-pressure connector. Take care to install the proper
O-ring.
SST616C
IInitially, tighten nut on tie-rod outer socket and knuckle arm to
64 to 69 N´m (6.5 to 7.0 kg-m, 47 to 51 ft-lb). Then tighten fur-
ther to align nut groove with first pin hole so that cotter pin can
be installed.
CAUTION:
Tightening torque must not exceed 108 N´m (11.0 kg-m, 80 ft-
lb).
SST819A
IBefore removing steering column lower joint from gear, set
gear in neutral (wheels in straight-ahead position). After
removing steering column lower joint, put matching mark on
pinion shaft and pinion housing to record neutral position.
ITo install, set left and right dust boots to equal deflection.
Attach steering column lower joint by aligning matching marks
of pinion shaft and pinion housing.
SST617C
ITighten gear housing mounting bracket bolts in the order
shown.
Secure tightening torque:
118 - 137 N´m (12 - 14 kg-m, 87 - 101 ft-lb)
SST718CA
DisassemblyNBST00281. Prior to disassembling, measure pinion rotating torque. Record
the pinion rotating torque as a reference.
IBefore measuring, disconnect cylinder tube and drain
fluid.
IUse soft jaws when holding steering gear housing. Handle
gear housing carefully, as it is made of aluminum. Do not
grip cylinder in a vise.
2. Remove pinion gear.
Be careful not to damage pinion gear when removing pinion
seal ring.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
POWER STEERING GEAR AND LINKAGE
Removal and Installation (Cont'd)
ST-19

SST933C
12. Attach a side plate inner seal and side plate outer seal with
Genuine Nissan PSF II or equivalent applied, to the side plate
(rear).
CAUTION:
The side plate inner seal and outer seal cannot be reused.
Always replace after every disassembly.
13. Set the power steering pump on the vice.
CAUTION:
When securing to the vice, use an aluminum plate or other
material to protect the installation surface of the power steer-
ing pump from damage.
14. Attach the rear body to the casing, and secure the bolts (4
bolts) in a diagonal order to the specified torque.
15. Attach the front bracket to the casing, and secure the bolts (2
bolts) to the specified torque.
16. Attach the inlet collector seal to the grooves of the inlet
collector, and attach the inlet collector to the casing with
attachment bolts.
CAUTION:
The inlet collector seal cannot be reused. Always replace after
every disassembly.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
POWER STEERING OIL PUMP
Assembly (Cont'd)
ST-31

FRONT & REAR SUSPENSION
SECTION
SU
CONTENTS
FRONT SUSPENSION....................................................2
Precautions ..................................................................2
PRECAUTIONS.........................................................2
Preparation ..................................................................2
SPECIAL SERVICE TOOLS........................................2
COMMERCIAL SERVICE TOOLS................................2
Noise, Vibration and Harshness (NVH)
Troubleshooting ...........................................................3
NVH TROUBLESHOOTING CHART............................3
Components.................................................................4
On-vehicle Service.......................................................5
FRONT SUSPENSION PARTS...................................5
FRONT WHEEL ALIGNMENT.....................................6
Coil Spring and Strut Assembly...................................8
COMPONENTS.........................................................8
REMOVAL.................................................................9
DISASSEMBLY..........................................................9
INSPECTION.............................................................9
ASSEMBLY.............................................................10
Stabilizer Bar .............................................................10
REMOVAL AND INSTALLATION...............................10
INSPECTION........................................................... 11
Transverse Link and Lower Ball Joint ....................... 11
REMOVAL AND INSTALLATION............................... 11
INSPECTION...........................................................12
Service Data and Specifications (SDS).....................13
GENERAL SPECIFICATIONS (FRONT).....................13
WHEEL ALIGNMENT (UNLADEN*1)..........................13
LOWER BALL JOINT...............................................13
WHEELARCH HEIGHT (UNLADEN*).........................14
WHEEL RUNOUT AVERAGE*..................................14
REAR SUSPENSION.....................................................15
Precautions ................................................................15
PRECAUTIONS.......................................................15
Preparation ................................................................15
COMMERCIAL SERVICE TOOLS..............................15
Noise, Vibration and Harshness (NVH)
Troubleshooting .........................................................15
Components...............................................................16
On-vehicle Service.....................................................16
REAR SUSPENSION PARTS...................................16
Removal and Installation ...........................................17
Coil Spring and Shock Absorber ...............................18
COMPONENTS.......................................................18
REMOVAL AND INSTALLATION...............................19
INSPECTION...........................................................19
Upper Link, Lower Link and Panhard Rod ................19
INSPECTION...........................................................19
BUSHING REPLACEMENT.......................................19
INSTALLATION........................................................20
Stabilizer Bar .............................................................20
REMOVAL AND INSTALLATION...............................20
Service Data and Specifications (SDS).....................20
GENERAL SPECIFICATIONS (REAR).......................20
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
BR
ST
RS
BT
HA
SC
EL
IDX

Noise, Vibration and Harshness (NVH)
Troubleshooting
=NBSU0035NVH TROUBLESHOOTING CHARTNBSU0035S01Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
Reference page
SU-4, 16
SU-8, 18
Ð
Ð
Ð
SU-8, 18
SU-6
SU-10, 20
SU-6
Ð
Ð
Ð
Ð
Ð
Ð
PD-3
PD-3
AX-3
AX-3
Refer to SUSPENSION
in this chart.
Refer to TIRES
in this chart.
Refer to ROAD WHEEL
in this chart.
BR-6
ST-6
Possible cause and
SUSPECTED
PA R T S
Improper installation, looseness
Shock absorber deformation,
damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
Out-of-round
Imbalance
Incorrect air pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
PROPELLER SHAFT
DIFFERENTIAL
DRIVE SHAFT
AXLE
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
STEERING Symptom
SUSPENSION
Noise´ ´ ´´´´ ´´´´ ´ ´ ´´
Shake´´´´´ ´´´ ´´´´
Vibration´ ´ ´´´ ´ ´´ ´ ´
Shimmy´´´´ ´ ´ ´ ´´´
Judder´´´ ´ ´ ´´´
Poor quality
ride or han-
dling´ ´ ´´´ ´´ ´ ´ ´
TIRES
Noise´ ´´´´´´ ´´´´ ´ ´ ´´
Shake´ ´´´´´ ´´ ´´ ´ ´ ´´
Vibration´´´´´´ ´
Shimmy´ ´´´´´´´ ´ ´ ´ ´´
Judder´ ´´´´´ ´ ´ ´ ´ ´´
Poor quality
ride or han-
dling´ ´´´´´ ´ ´ ´ ´
ROAD WHEEL
Noise´ ´´ ´ ´´´´ ´ ´ ´´
Shake´ ´´ ´ ´ ´´ ´ ´ ´´
Shimmy,
Judder´´´´´´´´´
Poor quality
ride or han-
dling´´´´´´´
´: Applicable
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT SUSPENSION
Noise, Vibration and Harshness (NVH) Troubleshooting
SU-3

SFA725B
ASSEMBLYNBSU0011IWhen installing coil spring on strut, it must be positioned as
shown in the figure at left.
SFA664AA
IInstall upper spring seat with its cutout facing the inner side of
vehicle.
SFA767B
Stabilizer Bar
REMOVAL AND INSTALLATIONNBSU0012IRemove stabilizer bar and connecting rod.
SFA768B
IWhen installing stabilizer, make sure that paint mark and
bracket face in their correct directions.
SFA769B
IWhen removing and installing stabilizer bar fix portion A.
FRONT SUSPENSION
Coil Spring and Strut Assembly (Cont'd)
SU-10

SFA449BA
IInstall stabilizer bar with ball joint socket properly placed.
ARA027
INSPECTIONNBSU0013ICheck stabilizer for deformation and cracks. Replace if neces-
sary.
ICheck rubber bushings for deterioration and cracks. Replace
if necessary.
ICheck ball joint can rotate in all directions. If movement is not
smooth and free, replace stabilizer bar connecting rod.
SFA757B
Transverse Link and Lower Ball Joint
REMOVAL AND INSTALLATIONNBSU00141. Separate drive shaft from knuckle.
Refer to AX-10, ªDrive Shaftº.
2. Separate lower ball joint stud from knuckle.
3. Remove lower ball joint assembly from transverse link.
4. Remove transverse link.
5. During installation, final tightening must be carried out at curb
weight with tires on ground.
6. After installation, check wheel alignment.
Refer to ªFRONT WHEEL ALIGNMENTº, ªOn-vehicle Serviceº,
SU-6.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT SUSPENSION
Stabilizer Bar (Cont'd)
SU-11