service INFINITI QX56 2011 Factory Service Manual

SQUEAK AND RATTLE TROUBLE DIAGNOSESEXT-7
< SYMPTOM DIAGNOSIS >
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If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or lo cation of the noise. This information can be used to
duplicate the same conditions when the repair is reconfirmed.
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following items:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half-cl utch on M/T models, drive position on A/T models).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
 Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
 If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the
vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, che ck ASIST for Technical Service Bulletins (TSBs) related
to the concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area. To help pinpoint the source of the noise, use a listening tool
(Chassis ear: J-39570, engine ear, and mechanics stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
 Removing the component(s) in the area that is / are suspected to be the cause of the noise.
Do not use too much force when removing clips and fasteners, otherwise clips and fasteners can be broken
or lost during the repair, resulting in the creation of new noise.
 Tapping or pushing/pulling the component(s) that is / are suspected to be the cause of the noise.
Do not tap or push/pull the component(s) with excessive force, otherwise the noise is eliminated only tempo-
rarily.
 Feeling for a vibration by hand by touching the component(s ) that is / are suspected to be the cause of the
noise.
 Placing a piece of paper between components that are suspected to be the cause of the noise.
 Looking for loose components and contact marks. Refer to EXT-8, "
Inspection Procedure".
REPAIR THE CAUSE
 If the cause is a loose component, tighten the component securely.
 If the cause is insufficient clearance between components:
- Separate components by repositioning or loosening and retightening the components, if possible.
- Insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape, or ure-
thane tape. A NISSAN Squeak and Rattle Kit (J-43980) is available through the authorized NISSAN Parts
Department.
CAUTION:
Never use excessive force as many components are constructed of plastic and may be damaged.
NOTE:
Always check with the Parts Department for the latest parts information.
The following materials are contained in the NISSA N Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
 76268-9E005: 100 ×135 mm (3.937 ×5.315 in)
 76884-71L01: 60 ×85 mm (2.362 ×3.346 in)
 76884-71L02: 15 ×25 mm (0.591 ×0.984 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
 73982-9E000: 45 mm (1.772 in) thick, 50 ×50 mm (1.969 ×1.969 in)
 73982-50Y00: 10 mm (0.394 in) thick, 50 ×50 mm (1.969 ×1.969 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.181 in) thick, 30 ×50 mm (1.181 ×1.969in)
FELT CLOTHTAPE
Revision: 2010 May2011 QX56

EXT-26
< REMOVAL AND INSTALLATION >
OVER FENDER
OVER FENDER
Exploded ViewINFOID:0000000006367611
Removal and InstallationINFOID:0000000006367612
REMOVAL
Front over fender
1. Remove front over fender front side fixing screws and bolts.
2. Remove front fender protector front side. Keep the service area. Refer to EXT-23, "
FENDER PROTEC-
TOR : Removal and Installation".
1. Grommet 2. Front over fender 3. Front fender proctor
4. Grommet 5. Clip 6. U nut
7. Grommet 8. Rear over fender
: Pawl
Refer to GI-4, "
Components" for symbols in the figure.
JMKIA5438ZZ
Revision: 2010 May2011 QX56

OVER FENDEREXT-27
< REMOVAL AND INSTALLATION >
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3. Disengage front over fender rear side fixing pawls from behind of front fender, and the pull front over fender front side toward
the direction shown in the figure.
CAUTION:
Never pull the front over fender strongly.
4. Remove front fender protector. Refer to EXT-23, "
FENDER PROTECTOR : Removal and Installation"
5. Remove side step front side fixing clips.
6. Disengage front over fender rear side fixing pawls from behind
of fender, and then pull front over fender front side toward the
direction shown in the figure.
CAUTION:
Never pull the front over fender strongly.
7. Remove front over fender.
Rear over fender
1. Remove rear over fender rear side fixing screws and bolts.
2. Remove rear fender protector rear side. Keep the service area. Refer to EXT-24, "
REAR WHEEL HOUSE
PROTECTOR : Removal and Installation".
3. Disengage rear over fender rear side fixing pawls from behind of rear fender, and the pull rear over fender rear side toward the
direction shown in the figure.
4. Remove rear fender protctor. Refer to EXT-24, "
REAR WHEEL HOUSE PROTECTOR : Removal and
Installation".
5. Remove rear over fender front side fixing screws and bolts.
6. Using a remover tool (A), disengage the clips from the rear over fender by starting from the rear.
CAUTION:
 Apply a protective tape (B) on the body to protect the
painted surface from damage.
 Disengage the clips slowly and carefully.
 Never pull the front o ver fender strongly.
: Pawl
JMKIA5452ZZ
: Clip
JMKIA5453ZZ
: Pawl
JMKIA5471ZZ
: Clip
JMKIA5472ZZ
Revision: 2010 May2011 QX56

FAX-1
TRANSMISSION & DRIVELINE
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SECTION FA X
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CONTENTS
FRONT AXLE
2WD
PRECAUTION ................ ...............................
3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
PREPARATION ............................................5
PREPARATION .............................................. .....5
Commercial Service Tools .................................. ......5
SYMPTOM DIAGNOSIS ...............................6
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
6
NVH Troubleshooting Chart ................................ ......6
PERIODIC MAINTENANCE ..........................7
FRONT WHEEL HUB AND KNUCKLE ......... .....7
Inspection ............................................................ ......7
REMOVAL AND INSTALLATION ................8
FRONT WHEEL HUB AND KNUCKLE ......... .....8
Exploded View .................................................... ......8
Removal and Installation ...........................................8
Inspection ..................................................................9
SERVICE DATA AND SPECIFICATIONS
(SDS) ......... ................................. ..................
10
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ....
10
Wheel Hub and Bearing Assembly ..................... ....10
4WDPRECAUTION ...............
...............................
11
PRECAUTIONS .................................................11
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
11
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect ...................................
11
Precautions for Drive Shaft ......................................12
PREPARATION ...........................................13
PREPARATION .................................................13
Special Service Tools .......................................... ....13
Commercial Service Tools .......................................13
SYMPTOM DIAGNOSIS ..............................15
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ...........................
15
NVH Troubleshooting Chart ................................ ....15
PERIODIC MAINTENANCE ........................16
FRONT WHEEL HUB AND KNUCKLE ............16
Inspection ............................................................ ....16
FRONT DRIVE SHAFT .....................................17
Inspection ................................................................17
REMOVAL AND INSTALLATION ...............18
FRONT WHEEL HUB AND KNUCKLE ............18
Exploded View ..................................................... ....18
Removal and Installation .........................................18
Inspection ................................................................20
FRONT DRIVE SHAFT BOOT ..........................21
Exploded View .........................................................21
Removal and Installation .........................................21
Inspection ................................................................21
FRONT DRIVE SHAFT .....................................22
Revision: 2010 May2011 QX56

FAX-2
Exploded View ........................................................22
Removal and Installation ........................................22
WHEEL SIDE ......................................................... ...23
WHEEL SIDE : Disassembly and Assembly ...........23
FINAL DRIVE SIDE ................................................ ...26
FINAL DRIVE SIDE : Disassembly and Assembly ...26
Inspection ...............................................................28
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................................
29
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
29
Wheel Hub and Bearing Assembly ...................... ...29
Drive Shaft ..............................................................29
Revision: 2010 May2011 QX56

PRECAUTIONSFAX-3
< PRECAUTION > [2WD]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006271838
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 whether 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 inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent 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 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation after Battery Disconnect
INFOID:0000000006271942
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both 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 batte ry 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 wil l 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

PREPARATIONFAX-5
< PREPARATION > [2WD]
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PREPARATION
PREPARATION
Commercial Service ToolsINFOID:0000000006225414
Tool name Description
Power tool Loosening bolts and nuts
Ball joint remover  Removing ball joint for steering knuckle  Removing hub bolt
PBIC0190E
NT146
Revision: 2010 May2011 QX56

FRONT WHEEL HUB AND KNUCKLEFAX-9
< REMOVAL AND INSTALLATION > [2WD]
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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 wheel hub and bearing assembly, and then remove splash guard.
11. Remove lower link from steering knuckle. CAUTION:
Never damage ball joint boot.
12. Remove steering knuckle.
13. 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.
14. Perform inspection after removal. Refer to FAX-9, "
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.
 Perform the final tightening of each of parts under unladen condi-
tions, which were removed when removing wheel hub and bearing
assembly and steering knuckle.
 Never reuse cotter pin.
 Perform inspection after installation. Refer to FA X - 9 , "
Inspection".
InspectionINFOID:0000000006225420
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 ba ll 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".
JPDIF0299ZZ
JPDIF0300ZZ
Revision: 2010 May2011 QX56

FAX-10
< SERVICE DATA AND SPECIFICATIONS (SDS) [2WD]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Wheel Hub and Bearing AssemblyINFOID:0000000006225429
Item Standard
Axial end play 0.05 mm (0.002 in) or less
Revision: 2010 May2011 QX56

PRECAUTIONSFAX-11
< PRECAUTION > [4WD]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006271941
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 whether 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 inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent 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 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation after Battery Disconnect
INFOID:0000000006271943
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both 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 batte ry 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 wil l 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