steering wheel INFINITI QX56 2011 Factory Service Manual

FAX-12
< PRECAUTION >[4WD]
PRECAUTIONS
5. When the repair work is completed, re-connect bot
h battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precautions for Drive ShaftINFOID:0000000006225390
 Observe the following precautions when disassembling and assembling drive shaft.
- Never disassemble joint sub-assembly because it is non-overhaul parts.
- Perform work in a location which is as dust-free as possible.
- Clean the parts, before disassembling and assembling.
- Prevent the entry of foreign objects dur ing disassembly of the service location.
- Reassemble disassembled parts carefully in the correct order. If work is interrupted, a clean cover must be placed over parts.
- Use paper waste. Fabric shop cloths must not be used because of the danger of lint adhering to parts.
- Clean disassembled parts (except for rubber parts) with kerosene which shall be removed by blowing with
air or wiping with paper waste.
Revision: 2010 May2011 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGFAX-15
< SYMPTOM DIAGNOSIS > [4WD]
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006225393
Use chart below to find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference
—
FAX-28—
FAX-18—
FAX-16
NVH in FAX and FSU sections
Refer to FRONT AXLE in this chart.
NVH in WT section
NVH in WT section
Refer to DRIVE SHAFT in this chart.
NVH in BR section
NVH in ST section
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
Wheel bearing damage
FRONT AXLE AND FRONT SUSPENSION
FRONT AXLE
TIRE
ROAD WHEEL
DRIVE SHAFT
BRAKE
STEERING
Symptom DRIVE
SHAFT
Noise
×× ××××× ××
Shake × × ××××× ××
FRONT
AXLE Noise
×××× ×××××
Shake ×××× ×××××
Vibration ×××× × × ×
Shimmy ×× × ×× ××
Judder × × ×× ××
Poor quality ride or handling ×× × ××
Revision: 2010 May2011 QX56

FAX-18
< REMOVAL AND INSTALLATION >[4WD]
FRONT WHEEL HUB AND KNUCKLE
REMOVAL AND INSTALLATION
FRONT WHEEL HUB AND KNUCKLE
Exploded ViewINFOID:0000000006225396
Removal and InstallationINFOID:0000000006225397
REMOVAL
1. Remove tires.
2. Remove brake hose bracket. Refer to
BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. CAUTION:
 Put matching marks on the wh eel hub and bearing assembly and the disc rotor before removing
the disc rotor.
 Never drop disc rotor.
5. Remove wheel sensor harness. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installa-
tion".
CAUTION:
Never pull on wheel sensor harness.
6. Remove steering outer socket. Refer to ST-42, "
Removal and Installation".
1. Steering knuckle 2. Cotter pin 3. Splash guard
4. Hub bolt 5. Wheel hub and bearing assembly 6. Disc rotor
7. Wheel hub lock nut
A. Tightening must be done following the installation procedure. Refer to FA X - 1 8 , "
Removal and Installation".
Refer to GI-4, "
Components" for symbols in the figure.
JPDIF0298GB
Revision: 2010 May2011 QX56

FRONT WHEEL HUB AND KNUCKLEFAX-19
< REMOVAL AND INSTALLATION > [4WD]
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7. Set suitable jack under lower link.
8. Remove shock absorber mounting bolt from lower link. Refer to FSU-10, "
Removal and Installation".
9. Separate upper link from steering knuckle, using the ball joint remover (commercial service tool), and
remove upper link.
CAUTION:
 Temporarily tighten the nut to prevent damage to threads and to prevent the ball joint remover
from suddenly coming off.
 Never damage ball joint boot.
10. Remove cotter pin, and then loosen wheel hub lock nut.
11. Put matching mark on drive shaft and wheel hub and bearing assembly. CAUTION:
Use paint or similar substance for matc hing marks. Never scratch the surface.
12. Patch wheel hub lock nut with a piece of wood. Hammer the wood to disengage wheel hub and bearing assembly from drive shaft.
CAUTION:
 Never place drive shaft joint at an extreme angle. Also be careful not to overextend slide joint.
 Never allow drive shaft to hang down without support for or joint sub-assembly, shaft and the
other parts.
NOTE:
Use suitable puller, if wheel hub and bearing assembly and drive shaft cannot be separated even after
performing the above procedure.
13. Remove wheel hub lock nut.
14. Remove wheel hub and bearing assembly, and then remove splash guard.
15. Remove lower link from steering knuckle. CAUTION:
Never damage ball joint boot.
16. Remove steering knuckle.
17. Remove hub bolts (1) from wheel hub and bearing assembly, using the ball joint remover (A) (commercial service tool).
CAUTION:
 Remove hub bolt only when necessary.
 Never hammer the hub bolt to avoid impact to the wheel
hub and bearing assembly.
 Pull out the hub bolt in a di rection perpendicular to the
wheel hub and bearing assembly.
18. Perform inspection after removal. Refer to FAX-20, "
Inspection".
INSTALLATION
Note the following, and install in the reverse order of removal.
 Place a suitable washer (A) as shown in the figure to install the hub
bolts (1) by using the tightening force of the nut (B).
CAUTION:
 Check that there is no cl earance between wheel hub and
bearing assembly, and hub bolt.
 Never reuse hub bolt.
 Use the following torque range for tightening the wheel hub lock nut.
CAUTION:
 Since the drive shaft is assembled by press-fitting , use the tightening torque range for the wheel
hub lock nut.
 Be sure to use torque wrench to tighten th e wheel hub lock nut. Never use a power tool.
 Perform the final tightening of each of parts under unladen conditions, which were removed when removing
wheel hub and bearing assembly and steering knuckle.
JPDIF0299ZZ
: 118 – 123 N·m (12.1 – 12.5 kg-m, 87 – 90 ft-lb)
JPDIF0300ZZ
Revision: 2010 May2011 QX56

FAX-20
< REMOVAL AND INSTALLATION >[4WD]
FRONT WHEEL HUB AND KNUCKLE
 Never reuse cotter pin.
 Perform inspection after installation. Refer to
FAX-20, "
Inspection".
InspectionINFOID:0000000006225398
INSPECTION AFTER REMOVAL
Check components for deformation, cracks, and other damage. Replace it if necessary.
Ball Joint Inspection
Check boots of lower link and steering outer socket ball joint for breakage, axial play, and torque. Refer to
FSU-15, "
Inspection" and ST-46, "Inspection".
INSPECTION AFTER INSTALLATION
1. Check wheel sensor harness for proper connection. Refer to BRC-134, "FRONT WHEEL SENSOR :
Exploded View".
2. Check the wheel alignment. Refer to FSU-7, "
Inspection".
3. Adjust neutral position of steering angle sensor. Refer to BRC-64, "
Work Procedure".
Revision: 2010 May2011 QX56

FAX-22
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
FRONT DRIVE SHAFT
Exploded ViewINFOID:0000000006225402
Removal and InstallationINFOID:0000000006225403
REMOVAL
1. Remove tires.
2. Remove brake hose bracket. Refer to
BR-23, "
FRONT : Removal and Installation".
3. Remove caliper assembly mounting bolts. Hang caliper assembly in a place where it will not interfere with work. Refer to BR-37, "
BRAKE CALIPER ASSEMBLY : Removal and Installation".
CAUTION:
Never depress brake pedal while brake caliper is removed.
4. Remove disc rotor. Refer to FAX-18, "
Removal and Installation".
5. Remove wheel sensor harness. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installa-
tion".
CAUTION:
Never pull on wheel sensor harness.
6. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
7. Remove steering outer socket. Refer to ST-42, "
Removal and Installation".
8. Set suitable jack under lower link.
9. Remove shock absorber mounting bolt from lower link. Refer to FSU-10, "
Removal and Installation".
10. Separate upper link from steering knuckle, using t he ball joint remover (commercial service tool), and
remove upper link.
CAUTION:
 Temporarily tighten the nut to prevent damage to threads and to prevent the ball joint remover
from suddenly coming off.
1. Circular clip 2. Dust shield 3. Housing
4. Snap ring 5. Ball cage/steel ball/inner race assem-
bly6. Stopper ring
7. Boot band 8. Boot 9. Shaft
10. Circular clip 11. Joint sub-assembly : Wheel side
: NISSAN genuine grease or an equivalent.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDIF0279ZZ
Revision: 2010 May2011 QX56

FRONT DRIVE SHAFTFAX-23
< REMOVAL AND INSTALLATION > [4WD]
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 Never damage ball joint boot.
11. Remove cotter pin, and then loosen wheel hub lock nut.
12. Patch wheel hub lock nut with a piece of wood. Hammer the wood to disengage wheel hub and bearing assembly from drive shaft.
CAUTION:
 Never place drive shaft joint at an extreme angle. Also be careful not to overextend slide joint.
 Never allow drive shaft to hang down without support for or joint sub-assembly, shaft and the
other parts.
NOTE:
Use suitable puller, if wheel hub and bearing assembly and drive shaft cannot be separated even after
performing the above procedure.
13. Remove wheel hub lock nut.
14. Remove fender protector. Refer to EXT-23, "
FENDER PROTECTOR : Removal and Installation".
15. Remove drive shaft from front final drive using the drive shaft attachment [SST: KV40107500 ( −)] (A) and a sliding ham-
mer (commercial service tool) (B) while inserting tip of the drive
shaft attachment between housing and front final drive.
CAUTION:
 Never place drive shaft joint at an extreme angle when
removing drive shaft. Also be careful not to overextend
slide joint.
 Confirm that the circular clip is attached to the drive shaft.
16. Perform inspection after removal. Refer to FAX-28, "
Inspection".
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Always replace final drive side oil seal with new one when installing drive shaft. Refer to DLN-160,
"Removal and Installation"
 Place the protector [SST: KV38106300 (−)] (A) onto final drive
to prevent damage to the oil seal while inserting drive shaft. Slide
drive shaft sliding joint and tap with a hammer to install securely.
CAUTION:
Check that circular clip is completely engaged.
 Use the following torque range for tightening the wheel hub lock nut.
CAUTION:
 Since the drive shaft is assembled by press-fitting, use the tightening torque range for the wheel hub lock nut.
 Be sure to use torque wrench to tighten th e wheel hub lock nut. Never use a power tool.
 Perform the final tightening of each of parts under unladen conditions, which were removed when removing
wheel hub and bearing assembly and steering knuckle.
 Never reuse cotter pin.
 Perform inspection after installation. Refer to FAX-28, "
Inspection".
WHEEL SIDE
WHEEL SIDE : Disassembly and AssemblyINFOID:0000000006225404
DISASSEMBLY
1. Fix shaft with a vise.
CAUTION:
Protect shaft when fixing with a vi se using aluminum or copper plates.
2. Remove dust shield from joint sub-assembly.
3. Remove boot bands and then remove boot from joint sub-assembly.
JPDIF0004ZZ
: 118 – 123 N·m (12.1 – 12.5 kg-m, 87 – 90 ft-lb)
JPDIF0023ZZ
Revision: 2010 May2011 QX56

FAX-28
< REMOVAL AND INSTALLATION >[4WD]
FRONT DRIVE SHAFT
Inspection
INFOID:0000000006225406
INSPECTION AFTER REMOVAL
 Move joint up/down, left/right, and in the axial directi ons. Check for motion that is not smooth and for signifi-
cant looseness.
 Check boot for cracks, damage, and leakage of grease.
 Disassemble drive shaft and exchange malfunctioning part if there is a non-standard condition.
INSPECTION AFTER DISASSEMBLY
Shaft
Check shaft for runout, cracks, or ot her damage. Replace it if necessary.
Joint Sub-Assembly (Wheel Side)
Check the following items, replace the parts if necessary.
 Joint sub-assembly for rough rotation and excessive axial looseness.
 The inside of the joint sub-assembly for entry of foreign material.
 Joint sub-assembly for compression scars, cra cks, and fractures inside of joint sub-assembly.
Replace joint sub-assembly if there are any non-standard conditions of components.
Housing (Final Drive side)
Replace housing if there is scratching or wear of housing roller contact surface.
INSPECTION AFTER INSTALLATION
1. Check wheel sensor harness for proper connection. Refer to BRC-134, "FRONT WHEEL SENSOR :
Exploded View".
2. Check the wheel alignment. Refer to FSU-7, "
Inspection".
3. Adjust neutral position of steering angle sensor. Refer to BRC-64, "
Work Procedure".
4. Adjust levelizer adjustment of height sensor. Refer to EXL-61, "
LEVELIZER ADJUSTMENT : Special
Repair Requirement".
SDIA1163J
Revision: 2010 May2011 QX56

FSU-1
SUSPENSION
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FSU
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O PCONTENTS
FRONT SUSPENSION
PRECAUTION ................ ...............................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
2
Precaution for Procedure without Cowl Top Cover ......3
Precautions for Suspension ......................................3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tools .......................................... ......4
Commercial Service Tools ........................................4
SYMPTOM DIAGNOSIS ...............................5
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
5
NVH Troubleshooting Chart ................................ ......5
PERIODIC MAINTENANCE ..........................6
FRONT SUSPENSION ASSEMBLY .............. .....6
Inspection ............................................................ ......6
WHEEL ALIGNMENT ..........................................7
Inspection ............................................................ ......7
Adjustment ................................................................7
REMOVAL AND INSTALLATION ................9
FRONT COIL SPRING AND SHOCK AB-
SORBER ............................................................
9
Exploded View ..................................................... .....9
Removal and Installation .........................................10
Disassembly and Assembly .....................................11
Inspection and Adjustment ......................................12
Disposal ...................................................................13
LOWER LINK ....................................................14
Exploded View .........................................................14
Removal and Installation .........................................14
Inspection ................................................................15
UPPER LINK ......................... ............................17
Exploded View ..................................................... ....17
Removal and Installation .........................................17
Inspection ................................................................18
FRONT STABILIZER ........................................20
Exploded View .........................................................20
Removal and Installation .........................................20
Inspection ................................................................20
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
21
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
21
Wheel Alignment ................................................. ....21
Ball Joint ..................................................................21
Wheel Height ...........................................................21
Revision: 2010 May2011 QX56

FSU-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006271944
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation after Battery Disconnect
INFOID:0000000006271945
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56