steering wheel INFINITI QX56 2011 Factory Service Manual

PRECAUTIONSFSU-3
< PRECAUTION >
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5. When the repair work is completed, re-connect both 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 ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of a ll control units using CONSULT-III.
Precaution for Procedure without Cowl Top CoverINFOID:0000000006271994
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions for SuspensionINFOID:0000000006225635
 When installing rubber bushings, the final tightening mu st be carried out under unladen conditions with tires
on ground. Spilled oil might shorten the life of rubb er bushings. Be sure to wipe off any spilled oil.
- Unladen conditions mean that fuel, engine coolant and l ubricant are full. Spare tire, jack, hand tools and
mats are in designated positions.
 After servicing suspension parts, be sure to check wheel alignment.
 Self-lock nuts are not reusable. Always use new ones w hen installing. Since new self-lock nuts are pre-oiled,
tighten as they are.
PIIB3706J
Revision: 2010 May2011 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGFSU-5
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006225638
Use chart below to find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FSU-9
,
FSU-14
, FSU-17
FSU-12
—
—
—
FSU-9
, FSU-14
, FSU-17
FSU-7FSU-20
NVH in DLN section.
NVH in DLN section.
NVH in FAX and FSU sections.
NVH in WT section.
NVH in WT section.
NVH in FAX section.
NVH in BR section.
NVH in ST section.
Possible cause and SUSPECTED PARTS
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
PROPELLER SHAFT
DIFFERENTIAL (4WD)
FRONT AXLE AND FRONT SUSPENSION
TIRE
ROAD WHEEL
DRIVE SHAFT (4WD)
BRAKE
STEERING
Symptom FRONT SUSPENSION Noise
×××××× ××××××××
Shake ×××× × × ××××××
Vibration ××××× × ×× × ×
Shimmy ×××× × ××× ××
Judder ××× ××× ××
Poor quality ride or
handling ××××× ×× ×××
Revision: 2010 May2011 QX56

FSU-6
< PERIODIC MAINTENANCE >
FRONT SUSPENSION ASSEMBLY
PERIODIC MAINTENANCE
FRONT SUSPENSION ASSEMBLY
InspectionINFOID:0000000006225639
MOUNTING INSPECTION
Check the mounting conditions (looseness, backlash) of each component and component conditions (wear,
damage) are normal.
BALL JOINT AXIAL END PLAY
1. Set front wheels in a straight-ahead position.
2. Measure axial end play by playing and moving up/dow n with iron bar or equivalent between lower link or
upper link and steering knuckle.
CAUTION:
 Never depress brake pedal when measuring.
 Never perform with tires on level ground.
 Be careful not to damage ball joint boot. Never damage the installation position by applying
excessive force.
Shock absorber
Check for oil leakage, damage. Replace it if necessary. Axial end play : Refer to
FSU-21, "
Ball Joint".
Revision: 2010 May2011 QX56

WHEEL ALIGNMENTFSU-7
< PERIODIC MAINTENANCE >
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WHEEL ALIGNMENT
InspectionINFOID:0000000006225640
DESCRIPTION
Measure wheel alignment under unladen conditions.
NOTE:
“Unladen conditions” means that fuel, engine coolant, and lubricant are full. Spare tire, jack, hand tools and
mats are in designated positions.
PRELIMINARY CHECK
Check the following:
 Tires for improper air pressure and wear
 Road wheels for runout: Refer to WT-64, "
Inspection".
 Wheel bearing axial end play: Refer to FA X - 7 , "
Inspection" (2WD), FAX-16, "Inspection" (4WD).
 Lower link and upper link ball joint axial end play: Refer to FSU-15, "
Inspection" and FSU-18, "Inspection".
 Shock absorber operation.
 Each mounting part of axle and suspension for looseness and deformation
 Lower link for cracks, deformation and other damage
 Vehicle height (posture)
GENERAL INFORMATION AND RECOMMENDATIONS
 A four-wheel thrust alignment should be performed.
- This type of alignment is recomm ended for any NISSAN/INFINITI vehicle.
- The four-wheel “thrust” process helps ensure that t he vehicle is properly aligned and the steering wheel is
centered.
- The alignment rack itself should be capable of accepting any NISSAN/INFINITI vehicle.
- The rack should be checked to ensure that it is level.
 Make sure the machine is properly calibrated.
- Your alignment equipment should be regularly ca librated in order to give correct information.
- Check with the manufacturer of your specific equi pment for their recommended Service/Calibration Sched-
ule.
ALIGNMENT PROCESS
IMPORTANT:
Use only the alignment specificati ons listed in this Service Manual.
 When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or
minus, Go/No Go). Never use these indicators.
- The alignment specifications programmed into your machine that operate these indicators may not be cor-
rect.
- This may result in an ERROR.
 Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com-
pensate” the sensors (alignment targets or head units). Never use this “Rolling Compensation” method.
- Use the “Jacking Compensation Method”. After installi ng the alignment targets or head units, raise the vehi-
cle and rotate the wheels 1/2 turn both ways.
- See Instructions in the alignment machine you're using for more information on this.
AdjustmentINFOID:0000000006225641
CAMBER, CASTER
1. Adjust with the front/rear side adjusting bolts (1) on the lower link
(2).
2. See the following table for the amount of cam bolt scale move- ment and the variation of camber and caster.
CAUTION:
Align the adjusting bolt cutout with the stamp of lower link
bracket.
: Vehicle front
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Revision: 2010 May2011 QX56

FSU-8
< PERIODIC MAINTENANCE >
WHEEL ALIGNMENT
3. Note the following, and adjust as shown in the figure.
a. Obtain the point at the intersection of the measured values on the figure.
b. Read the coordinate (scale) of the intersection point.
c. Move the front/rear side adjusting bolts by each scale.  If the coordinate (scale) of the intersection point is positive, move the adjusting bolt to the vehicle inside.
 If the coordinate (scale) of the intersection point is negative, move the adjusting bolt to the vehicle out-
side.
d. Measure the camber and caster again. Check that the standard is within the proper range.
CAUTION:
 Always adjust the angle difference betw een left and right cambers within 33′.
 Always adjust the angle difference be tween left and right casters within 45′.
TOE-IN
Loosen the steering outer socket, and then adjus t the length using steering inner socket.
CAUTION:
 Always evenly adjust both toe-in alternately and adjust the difference between the left and right to
the standard.
 Always fix the steering inner socket when tightening the steering outer socket.
A : Vehicle outside
B : Vehicle inside
Amount of
cam bolt scale
movement Front
1 segment
on vehicle outside 1 segment
on vehicle inside 1 segment
on vehicle inside 1 segment
on vehicle outside 1 segment
on vehicle inside 1 segment
on vehicle outside Amount of
movement 0 Amount of
movement 0
Rear 1 segment
on vehicle inside 1 segment
on vehicle outside 1 segment
on vehicle inside 1 segment
on vehicle outside Amount of
movement 0 Amount of
movement 0 1 segment
on vehicle inside 1 segment
on vehicle outside
Camber angle 0 ′0′ +7′− 7′ +3′− 3′ +3′− 3′
Caster angle −14 ′ +14′ 0′ 0′ +7′− 7′− 7′ +7′
Camber, caster : Refer to FSU-21, "Wheel Alignment".
JPEIA0239GB
Toe-in : Refer to FSU-21, "Wheel Alignment".
Revision: 2010 May2011 QX56

FSU-10
< REMOVAL AND INSTALLATION >
FRONT COIL SPRING AND SHOCK ABSORBER
CAUTION:
The shock absorber assembly cannot be disassembled.
Removal and InstallationINFOID:0000000006225643
REMOVAL
1. Reduce system pressure. (With HBMC) Refer to SCS-18, "Work Procedure".
CAUTION:
Inadvertent piping removal causes fluid to splatter.
2. Remove tires with power tool. Refer to WT-64, "
Removal and Installation".
3. Remove brake hose bracket from steering knuckle. Refer to BR-23, "
FRONT : Removal and Installation".
4. 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.
5. Remove disc rotor. Refer to FA X - 8 , "
Removal and Installation" (2WD), FAX-18, "Removal and Installation"
(4WD).
6. Remove wheel sensor and harness connector. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal
and Installation".
CAUTION:
Never pull on wheel sensor harness.
7. Remove steering outer socket fr om steering knuckle. Refer to ST-42, "
Removal and Installation".
8. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
9. Set suitable jack under lower link.
10. Remove stabilizer connecting rod from lower link. (Without HBMC) Refer to FSU-20, "
Removal and Instal-
lation".
11. Separate upper link from steering knuckle. Refer to FSU-17, "
Removal and Installation".
1. Shock absorber assembly 2. Lower link
Refer to GI-4, "
Components" for symbols in the figure.
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Revision: 2010 May2011 QX56

FSU-14
< REMOVAL AND INSTALLATION >
LOWER LINK
LOWER LINK
Exploded ViewINFOID:0000000006225646
Removal and InstallationINFOID:0000000006225647
REMOVAL
1. Remove tires with power tool. Refer to WT-64, "Removal and Installation".
2. Remove brake hose bracket from steering knuckle. 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 FA X - 8 , "
Removal and Installation" (2WD), FAX-18, "Removal and Installation"
(4WD).
5. Remove wheel sensor and harness connector. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal
and Installation".
CAUTION:
Never pull on wheel sensor harness.
6. Remove steering outer socket fr om steering knuckle. Refer to ST-42, "
Removal and Installation".
7. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
8. Set suitable jack under lower link.
9. Remove stabilizer connecting rod from lower link. (Without HBMC) Refer to FSU-20, "
Removal and Instal-
lation".
10. Remove shock absorber mounting bolt from lower link.
11. Separate upper link from steering knuckle. Refer to FSU-17, "
Removal and Installation".
1. Upper link 2. Eccentric disc 3. Lower link
4. Bump rubber 5. Adjusting bolt
Refer to GI-4, "
Components" for symbols in the figure.
JPEIA0237GB
Revision: 2010 May2011 QX56

FSU-16
< REMOVAL AND INSTALLATION >
LOWER LINK
2. Move tip of ball stud in axial direction to check for looseness.
 If axial end play exceeds standard range, replace lower link assembly.
INSPECTION AFTER INSTALLATION
1. Check wheel sensor harness for proper connection. Refer to BRC-134, "FRONT WHEEL SENSOR :
Exploded View".
2. Check 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".
Axial end play : Refer to
FSU-21, "
Ball Joint".
Revision: 2010 May2011 QX56

UPPER LINKFSU-17
< REMOVAL AND INSTALLATION >
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UPPER LINK
Exploded ViewINFOID:0000000006225649
Removal and InstallationINFOID:0000000006225650
REMOVAL
1. Remove tires with power tool. Refer to WT-64, "Removal and Installation".
2. Remove brake hose bracket from steering knuckle. 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 FA X - 8 , "
Removal and Installation" (2WD), FAX-18, "Removal and Installation"
(4WD).
5. Remove wheel sensor and harness connector. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal
and Installation".
CAUTION:
Never pull on wheel sensor harness.
6. Remove height sensor from upper link (right side). Refer to EXL-136, "
Removal and Installation".
7. Set suitable jack under lower link.
8. Separate upper link from steering knuckle. Refer to FA X - 8 , "
Removal and Installation" (2WD), FAX-18,
"Removal and Installation" (4WD).
9. Remove upper link mounting bolts, nuts, and upper link from vehicle.
10. Perform inspection after removal. Refer to FSU-18, "
Inspection".
1. Upper link 2. Eccentric disc 3. Lower link
4. Bump rubber 5. Adjusting bolt
Refer to GI-4, "
Components" for symbols in the figure.
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Revision: 2010 May2011 QX56

FSU-18
< REMOVAL AND INSTALLATION >
UPPER LINK
INSTALLATION
Note the following, and install in the reverse order of removal.
 Perform final tightening of bolts and nuts at the vehicle installation position (rubber bushing), under unladenconditions with tires on level ground.
 Perform inspection after installation. Refer to FSU-18, "
Inspection".
InspectionINFOID:0000000006225651
INSPECTION AFTER REMOVAL
Appearance
Check the following items, and replace the part if necessary.
 Upper link and bushing for deformation, cracks or damage.
 Ball joint boot for cracks or other damage, and also for grease leakage.
Ball Joint Inspection
Manually move ball stud to confirm it moves smoothly with no binding.
Swing Torque Inspection
1. Move the ball joint at least ten times by hand to check for smooth movement.
2. Hook a spring balance (A) at cotter pin mounting hole. Confirm
spring balance measurement value is within specifications when
ball stud begins moving.
 If swing torque exceeds standard range, replace upper link assem- bly.
Rotating Torque Inspection
1. Move the ball joint at least ten times by hand to check for smooth movement.
2. Attach mounting nut to ball stud. Check that rotating torque is
within specifications with a preload gauge [SST: 3127S000 (J-
25765-A)] (A).
 If rotating torque exceeds standard range, replace lower link assembly.
Axial End Play Inspection
1. Move the ball joint at least ten times by hand to check for smooth movement.
2. Move tip of ball stud in axial direction to check for looseness.
 If axial end play exceeds standard range, replace upper link assembly.
INSPECTION AFTER INSTALLATION
1. Check wheel sensor harness for proper connection. Refer to BRC-134, "FRONT WHEEL SENSOR :
Exploded View".
2. Check wheel alignment. Refer to FSU-7, "
Inspection".
3. Adjust neutral position of steering angle sensor. Refer to BRC-64, "
Work Procedure".
Swing torque : Refer to
FSU-21, "
Ball Joint".
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Rotating toque : Refer to FSU-21, "Ball Joint".
PDIA1258E
Axial end play : Refer to FSU-21, "Ball Joint".
Revision: 2010 May2011 QX56