height INFINITI QX56 2009 Factory Repair Manual

SUNROOF SYSTEMRF-53
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GAP ADJUSTMENT
NOTE:
If any gap or height difference between glass lid and roof panel is found, check glass lid fit and adjust as fol-
lows:
1. Open sunshade assembly.
2. Loosen glass lid securing screws (two each on left and right sides), then tilt glass lid down.
3. Manually adjust glass lid from outside of v ehicle so it resembles "A - A" as shown.
4. After adjusting glass lid tilt glass lid up and tighten screws.
5. Tilt glass lid up and down several times to check that it moves smoothly.
HEIGHT DIFFERE NCE ADJUSTMENT
If an excessive height difference between glass lid assemb ly and roof panel is found, adjust in the following
manner:
1. Remove headlining. Refer to INT-17, "
Removal and Installation".
2. Loosen sunroof frame assembly nuts and sunroof bracket bolts.
3. Add shims until gap is within specification "A-A". NOTE:
Temporarily snug nuts and bolts to prevent movement between each adjustment.
4. Tilt glass lid assembly up and down several times to check that it moves and seals properly.
5. Tighten sunroof frame assembly nuts and sunroof bracket bolts. NOTE:
First tighten left front then right rear sunroof frame assembly to prevent uneven torque while tightening
remaining sunroof bracket bolts.
6. Install headlining. Refer to INT-17, "
Removal and Installation".
WIIA0304E
Revision: December 20092009 QX56

RSU-1
SUSPENSION
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SECTION RSU
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REAR 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
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
SYMPTOM DIAGNOSIS ...............................5
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ .....
5
NVH Troubleshooting Chart ................................ ......5
ON-VEHICLE MAINTENANCE .....................6
REAR SUSPENSION ASSEMBLY ................ .....6
On-Vehicle Inspection and Service ..................... ......6
Wheel AlignmentInspection .......................................6
ON-VEHICLE REPAIR ..................................9
REAR SUSPENSION ASSEMBLY ................ .....9
Component .......................................................... ......9
REMOVAL AND INSTALLATION ...............11
REAR SUSPENSION MEMBER .................... ....11
Removal and Installation ..................................... ....11
SHOCK ABSORBER ........................................15
Removal and Installation ..................................... ....15
Disposal ...................................................................15
SUSPENSION ARM ..........................................17
Removal and Installation .........................................17
FRONT LOWER LINK .......................................19
Removal and Installation .........................................19
REAR LOWER LINK & COIL SPRING .............21
Removal and Installation .........................................21
STABILIZER BAR .............................................23
Removal and Installation .........................................23
REAR LOAD LEVELING AIR SUSPENSION
COMPRESSOR ASSEMBLY ............................
24
Removal and Installation .........................................24
CONTROL UNIT ................................................26
Removal and Installation .........................................26
Initialization Procedure ............................................26
HEIGHT SENSOR .............................................27
Removal and Installation .........................................27
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
29
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
29
Wheel Alignment (Unladen*1) ............................. ....29
Ball Joint ..................................................................29
Wheelarch Height (Unladen*1) ................................30
Revision: December 20092009 QX56

RSU-6
< ON-VEHICLE MAINTENANCE >
REAR SUSPENSION ASSEMBLY
ON-VEHICLE MAINTENANCE
REAR SUSPENSION ASSEMBLY
On-Vehicle Inspection and ServiceINFOID:0000000003772290
Check all of the component mountings for any excessive looseness, or back lash. Check the components for
any excessive wear, damage, or abnormal conditions. Repair or replace the components as necessary.
SHOCK ABSORBER INSPECTION
 Check the shock absorbers for any air l eaks or damage, and replace as necessary.
 Check the hoses for any air leaks or damage, and replace as necessary.
Wheel AlignmentInspectionINFOID:0000000005889867
Rear Wheel Alignment Adjusting Bolts
PRELIMINARY INSPECTION
WARNING:
Always adjust the alignm ent with the vehicle on a flat su rface. Use CONSULT-III “EXHAUST SOLE-
NOID” active test to release the air pressure from the rear load leveling air suspension system.
NOTE:
If alignment is out of specificat ion, inspect and replace any damaged or worn rear suspension parts before
making any adjustments.
1. Check and adjust the wheel alignment with the vehicle under unladen conditions. “Unladen conditions”
means that the fuel, coolant, and lubricant are full; and that the spare tire, jack, hand tools and mats are in
their designated positions.
2. Check the tires for incorrect air pressure and excessive wear.
3. Check the wheels for runout and damage.
4. Check the wheel bearing axial end play.
5. Check the shock absorbers. Refer to RSU-6, "On-Vehicle Inspection and Service"
.
6. Check each mounting point of the suspension components for any excessive looseness or damage.
7. Check each link, arm, and the rear suspension member for any damage.
8. Check the vehicle height. Refer to RSU-29, "Wheel Alignment (Unladen
*1)" .
WEIA0102E
1. Rear lower link adjusting bolt, LH 2. Front lower link adjusting bolt, LH 3. Front lower link adjusting bolt, RH
4. Rear lower link adjusting bolt, RH
Axial end play : 0 mm (0 in)
Revision: December 20092009 QX56

REAR SUSPENSION ASSEMBLYRSU-7
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 If vehicle height is not within ± 10 mm (0.39 in) of the specification, perform the control unit initialization
procedure. Refer to SCS-7, "CONSULT-III Function"
.
GENERAL INFORMATION AND RECOMMENDATIONS
1. A Four-Wheel Thrust Alignment should be performed.
 This type of alignment is re commended for any NISSAN vehicle.
 The four-wheel “thrust” process helps ensure that the vehicle is properly aligned and the steering wheel
is centered.
 The alignment machine itself should be ca pable of accepting any NISSAN vehicle.
 The alignment machine should be checked to ensure that it is level.
2. Make sure the alignment machine is properly calibrated.  Your alignment machine should be regularly calibrated in order to give correct information.
 Check with the manufacturer of your specific a lignment machine for their recommended Service/Cali-
bration Schedule.
THE ALIGNMENT PROCESS
IMPORTANT: Use only the alignment specifications listed in this Service Manual. Refer to RSU-29, "Wheel
Alignment (Unladen*1)".
1. When displaying the alignment settings, many alignm ent machines use “indicators”: (Green/red, plus or
minus, Go/No Go). Do NOT use these indicators.
 The alignment specifications programmed into your alignment machine that operate these indicators
may not be correct.
 This may result in an ERROR.
2. Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com- pensate” the sensors (alignment targets or head units). Do NOT use this “Rolling Compensation”
method.
 Use the “Jacking Compensation” method. After installing the alignment targets or head units, raise the vehicle and rotate the wheels 1/2 turn both ways.
 See Instructions in the alignment machine you are using for more information.
CAMBER
1. Measure camber of both the right and left wheels with a suitable alignment gauge and adjust as necessary to specification.
2. If outside of the specified val ue, adjust the camber using the
adjusting bolt in the front lower link.
CAUTION:
After adjusting the camber then check the toe-in.
NOTE:
Camber changes about 0 ° 5' with each graduation of the adjust-
ing bolt.
3. Tighten the adjusting bolt nuts to specification.
TOE-IN
 Measure the toe-in of the rear wheels. If out of s pecification, inspect and replace any damaged or worn rear
suspension parts before adjusting. Camber : Refer to
RSU-29, "Wheel Alignment (Un-
laden*1)"
SRA096A
LEIA0041E
Total toe-in : Refer to RSU-29, "Wheel Alignment (Unladen*1)"
Revision: December 20092009 QX56

RSU-10
< ON-VEHICLE REPAIR >
REAR SUSPENSION ASSEMBLY
Rear Load Leveling Air Suspension System
1. Seat belt latch anchor 2. Stabilizer bar bushing 3. Stabilizer bar clamp
4. Stabilizer bar 5. Connecting rod 6. Front lower link
7. Knuckle 8. Bushing 9. Rear lower link
10. Shock absorber 11. Suspension arm 12. Lower rubber seat
13. Coil spring 14. Upper rubber seat 15. Rear suspension member
16. Spare tire bracket 17. Bound bumper Front
AWEIA0054GB
1. Rear load leveling air suspension hose, RH 2. Shock absorber, RH 3. Height sensor
4. Rear load leveling air suspension hose, LH 5. Shock absorber, LH 6. Rear load leveling air suspension
compressor assembly
Front
Revision: December 20092009 QX56

RSU-12
< REMOVAL AND INSTALLATION >
REAR SUSPENSION MEMBER
Rear Load Leveling Air Suspension System
REMOVAL
1. If equipped with rear load leveling air suspension system, use CONSULT-III “EXHAUST SOLENOID”
active test to release the air pressure from the rear load leveling air suspension system.
2. If equipped with the rear load leveling air suspension system, disconnect the electrical connectors for the
height sensor and the rear load leveling air suspension compressor assembly.
3. If equipped with the rear load leveling air suspension system, unclip the rubber cover to access the rear
load leveling air suspension compressor assembly.
1. Seat belt latch anchor 2. Stabilizer bar bushing 3. Stabilizer bar clamp
4. Stabilizer bar 5. Connecting rod 6. Front lower link
7. Knuckle 8. Bushing 9. Rear lower link
10. Shock absorber 11. Suspension arm 12. Lower rubber seat
13. Coil spring 14. Upper rubber seat 15. Rear suspension member
16. Spare tire bracket 17. Bound bumper Front
AWEIA0054GB
1. Rear load leveling air suspension
hose, RH 2. Shock absorber, RH 3. Height sensor
4. Rear load leveling air suspension hose, LH 5. Shock absorber, LH 6. Rear load leveling air suspension
compressor assembly (includes the
bracket and rubber cover)
Front
Revision: December 20092009 QX56

REAR SUSPENSION MEMBERRSU-13
< REMOVAL AND INSTALLATION >
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4. If equipped with the rear load leveling air suspension system, disconnect the rear load leveling air suspension hoses at the
rear load leveling air suspension compressor assembly.
 To disconnect the hoses, push in on the lock ring using a suit-
able tool and pull the hose out.
5. Remove both of the rear wheel and tire assemblies using power tool.
6. Remove the brake caliper without disconnecting the brake hoses, using power tool. Reposition the brake caliper out of the
way using a suitable wire. Refer to BR-36, "Removal and Instal-
lation of Brake Caliper and Disc Rotor".
CAUTION:
 Do not crimp or stretch the brake hose when re positioning the brake caliper out of the way.
 Do not press brake pedal while the brake caliper is removed.
7. Remove the spare tire.
8. Remove both lower shock bolts.
9. Disconnect the two rear ABS sensor electrical connectors.
10. Remove the two rear drive shafts. Refer to RAX-9, "Removal and Installation"
.
11. Remove the rear final drive. Refer to DLN-250, "Removal and Installation"
.
12. Remove the EVAP canister bolt from the top of the rear suspension member.
13. Disconnect the parking brake cables from t he brackets on the rear suspension member.
14. Disconnect parking brake cables at equalizer. Refer to PB-7, "Removal and Installation"
.
15. Set a suitable jack to support each of the rear lower links and the coil spring tension.
16. Remove both of the rear lower link outer bolts and lower the jack to remove the rear coil springs.  If equipped with the rear load leveling air suspension system,
remove the height sensor bracket bolt from the LH lower link.
17. Remove the two bolts to disconnect the seat belt latch anchor from the rear suspension member.
18. Disconnect both of the connecting r ods from the front lower link.
19. Set a suitable jack under the rear suspension member.
20. Remove the six rear suspension member bolts.
21. Slowly lower the jack to remove the rear suspension member, suspension arm, front and rear lower links and stabilizer bar as
an assembly.
22. If necessary, remove the suspension arm, spare tire bracket, height sensor, rear load leveling air suspension hoses, stabilizer
bar, and front and rear lower links from the rear suspension
member.
INSPECTION AFTER REMOVAL
Check rear suspension member for deformation, cracks, and other damage and replace if necessary.
INSTALLATION
Installation is in the reverse order of removal.
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Revision: December 20092009 QX56

SHOCK ABSORBERRSU-15
< REMOVAL AND INSTALLATION >
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SHOCK ABSORBER
Removal and InstallationINFOID:0000000005889873
REMOVAL
1. Remove the wheel and tire assembly using power tool. Refer to WT-41, "Adjustment".
2. If equipped with the rear load leveling air suspens ion system, use CONSULT-III "EXHAUST SOLENOID"
active test to release the air pressure from the rear load leveling air suspension system.
3. Disconnect the height sensor electrical connector.
4. If equipped with the rear load leveling air suspension system, disconnect the rear load leveling air suspension hose from the
shock absorber.
 To disconnect the hose, push in on the lock ring using a suit-able tool and pull the air hose out.
5. Remove rear wheel fender protector front .
6. Remove the shock absorber upper and lower end bolts using power tool.
7. Remove the shock absorber. CAUTION:
If equipped with the rear lo ad leveling air suspension sys-
tem, do not damage the rubber boot on the shock absorber.
INSTALLATION
Installation is in the reverse order of removal.
 Tighten the shock absorber bolts to specification. Refer to RSU-15, "Removal and Installation"
.
DisposalINFOID:0000000005873208
1. Set shock absorber horizontally with the piston rod fully extended.
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Revision: December 20092009 QX56

SUSPENSION ARMRSU-17
< REMOVAL AND INSTALLATION >
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SUSPENSION ARM
Removal and InstallationINFOID:0000000005889874
REMOVAL
1. If equipped with rear load leveling air suspension system, use CONSULT-III “EXHAUST SOLENOID”
active test to release the air pressure from the rear load leveling air suspension system.
2. If equipped with the rear load leveling air suspension system, disconnect the electrical connectors for the
height sensor and the rear load leveling air suspension compressor assembly.
3. If equipped with the rear load leveling air suspension system, unclip the rubber cover to access the rear
load leveling air suspension compressor assembly.
4. If equipped with the rear load leveling air suspension system, disconnect the rear load leveling air suspension hoses at the
rear load leveling air suspension compressor assembly.
 To disconnect the hoses, push in on the lock ring using a suit-able tool and pull the hose out.
5. Remove both of the rear wheel and tire assemblies using power tool.
6. Remove the brake caliper without disconnecting the brake hoses, using power tool. Reposition the brake caliper out of the
way using a suitable wire. Refer to BR-36, "Removal and Instal-
lation of Brake Caliper and Disc Rotor".
CAUTION:
 Do not crimp or stretch the brake hose when re positioning the brake caliper out of the way.
 Do not press brake pedal while the brake caliper is removed.
7. Remove the spare tire.
8. Remove both lower shock bolts.
9. Disconnect the two rear ABS sensor electrical connectors.
10. Remove the two rear drive shafts at t he rear final drive and support drive shafts.
11. Remove the rear final drive. Refer to DLN-250, "Removal and Installation"
.
12. Remove the EVAP canister bolt from the top of the rear suspension member.
13. Disconnect the parking brake cables from t he brackets on the rear suspension member.
14. Disconnect parking brake cables at equalizer. Refer to PB-7, "Removal and Installation"
.
15. Set a suitable jack to support each of the rear lower links and the coil spring tension.
16. Remove both of the rear lower link outer bolts and lower the jack to remove the rear coil springs.  If equipped with the rear load leveling air suspension systemremove the height sensor bracket bolt from the LH rear lower link.
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Revision: December 20092009 QX56

REAR LOWER LINK & COIL SPRINGRSU-21
< REMOVAL AND INSTALLATION >
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REAR LOWER LINK & COIL SPRING
Removal and InstallationINFOID:0000000005889876
REMOVAL
1. Remove the wheel and tire assembly using power tool. Refer to WT-41, "Adjustment".
2. If equipped with rear load leveling air suspension system, use CONSULT-III “EXHAUST SOLENOID”
active test to release the air pressure from the rear load leveling air suspension system.
3. If equipped with the rear load leveling air suspension system, for removing the LH rear lower link and coil spring, remove the
height sensor arm bracket bolt from the rear lower link.
4. Remove speed sensor harness and brackets from rear lower link.
5. Set a suitable jack to relieve the coil spring tension and support the rear lower link.
6. Loosen the rear lower link adjusting bolt and nut connected to the rear suspension member, using power tool.
7. Remove the rear lower link bolt and nut from the knuckle using power tool.
LEIA0080E
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Revision: December 20092009 QX56