2007 INFINITI QX56 wheel alignment

MA-4
< SERVICE INFORMATION >
GENERAL MAINTENANCE
GENERAL MAINTENANCE
General MaintenanceINFOID:0000000003533859
General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owner can perform these
checks and inspections or have their INFINITI dealers perform them.
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed from time to time, unless otherwise specified.
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the vehicle,
etc.
ItemReference page
TiresCheck the pressure with a gauge at least once a month and always prior to a
long distance trip. Adjust to the specified pressure if necessary. Check carefully
for damage, cuts or excessive wear.—
Wheel lug nutsWhen checking the tires, make sure no nuts are missing, and check for any loose
nuts. Tighten if necessary.WT-7, "
Rotation"
WindshieldClean the windshield on a regular basis. Check the windshield at least every six
months for cracks or other damage. Repair as necessary.—
Tire rotationTires should be rotated every 12,000 km (7,500 miles).WT-7, "
Rotation"
Wheel alignment and
balanceIf the vehicle pulls to either side while driving on a straight and level road, or if
you detect uneven or abnormal tire wear, there may be a need for wheel align-
ment. If the steering wheel or seat vibrates at normal highway speeds, wheel bal-
ancing may be needed.WT-6, "Balancing
Wheels", FSU-6, "Front
Wheel Alignment"
Windshield wiper
bladesCheck for cracks or wear if they do not wipe properly.
—
Doors and engine
hoodCheck that all doors and the engine hood operate smoothly as well as the back
hatch. Also make sure that all latches lock securely. Lubricate if necessary. Make
sure that the secondary latch keeps the hood from opening when the primary
latch is released.
When driving in areas using road salt or other corrosive materials, check lubri-
cation frequently.MA-30, "
Lubricating
Locks, Hinges and Hood
Latches"
Lamps
Make sure that the head lamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check head
lamp aim. Clean the head lamps on a regular basis.LT- 2 0 , "Aiming Adjust-
ment" for US, LT- 3 3 ,
"Aiming Adjustment" for
Canada
ItemReference page
Warning lamps and
buzzers/chimesMake sure that all warning lamps and buzzers/chimes are operating properly.DI-21, "
Electrical Com-
ponent Inspection"
Windshield wiper and
washerCheck that the wipers and washer operate properly and that the wipers do not
streak.—
Windshield defrosterCheck that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioner.—
Steering wheelCheck that it has the specified play. Be sure to check for changes in the steering
condition, such as excessive play, hard steering or strange noises.PS-7, "
On-Vehicle In-
spection and Service"
SeatsCheck seat position controls such as seat adjusters, seat back recliner, etc. to
make sure they operate smoothly and that all latches lock securely in every po-
sition. Check that the head restraints move up and down smoothly and that the
locks (if equipped) hold securely in all latched positions. Check that the latches
lock securely for folding-down rear seat backs.—
Seat beltsCheck that all parts of the seat belt system (e.g. buckles, anchors, adjusters and
retractors) operate properly and smoothly and are installed securely. Check the
belt webbing for cuts, fraying, wear or damage.SB-10, "
Seat Belt Inspec-
tion", MA-30, "Checking
Seat Belts, Buckles, Re-
tractors, Anchors and
Adjusters"
Accelerator pedalCheck the pedal for smooth operation. Keep the floor mats away from the pedal. —

STEERING WHEEL
PS-7
< SERVICE INFORMATION >
C
D
E
F
H
I
J
K
L
MA
B
PS
N
O
P
STEERING WHEEL
On-Vehicle Inspection and ServiceINFOID:0000000003532824
CHECKING CONDITION OF INSTALLATION
• Check installation condition of steering gear assembly, front suspension, axle and steering column.
• Check if movement exists when steering wheel is moved up and down, to the left and right and to the axial
direction.
• Check if the mounting nuts for steering gear assembly are loose.
Refer to PS-15
.
CHECKING STEERING WHEEL PLAY
1. Turn tires straight ahead, start engine, then turn steering wheel to the left and right lightly, and measure
steering wheel movement on the outer circumference when steering wheel is turned up to the point where
tires start moving.
CHECKING NEUTRAL POSITION ON STEERING WHEEL
• Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to FSU-
6, "Front Wheel Alignment" .
1. Turn tires straight ahead, check if steering wheel is in the neutral position.
2. If it is not in the neutral position, remove steering wheel and reinstall it correctly.
3. If the neutral position cannot be attained by repositioning the steering wheel two teeth or less on steering
stem, loosen tie-rod lock nuts of steering outer sockets, then adjust tie-rods by the same amount in the
opposite direction.
CHECKING STEERING WHEEL TURNING FORCE
1. Park vehicle on a level, dry surface and set parking brake.
2. Start engine.
3. Bring power steering fluid up to operating temperature of 60° – 80°C (140° – 176°F).
4. Tires need to be inflated to specified pressure. Refer to WT-28, "
Tire".
5. Check steering wheel turning force using Tool when steering
wheel has been turned 360° from the neutral position.
6. If steering wheel turning force is out of specification, inspect
steering column. Refer to PS-13, "
Disassembly and Assembly" .
7. If steering column meets specification, repair steering gear.
Refer to PS-17, "
Disassembly and Assembly". End play of the axial direction for steering wheel : 0 mm (0 in)
LGIA0024E
Steering wheel play on the outer circumference : 0 − 35 mm (0 − 1.38 in)
Tool number : J-44372
Steering wheel
turning force: 39 N (4 kg-f, 9 lb-f) or less
WGIA0035E

PS-8
< SERVICE INFORMATION >
STEERING WHEEL
CHECKING FRONT WHEEL TURNING ANGLE
When checking front wheel turning angle, refer to FSU-6, "Front Wheel Alignment" .
Removal and InstallationINFOID:0000000003532825
REMOVAL
1. Set the front wheels in the straight-ahead position.
2. Remove the driver air bag module. Refer to SRS-35, "
Removal and Installation".
3. Disconnect steering wheel switches.
4. Remove the steering wheel center nut.
5. Remove the steering wheel using Tools.
CAUTION:
Place a piece of tape across the spiral cable so it will not be
rotated out of position.
6. Inspect the steering wheel near the puller holes for damage. If
damaged, replace the steering wheel.
• Remove steering wheel rear cover and steering wheel
switches, if required.
INSTALLATION
Installation is in the reverse order of removal.
• Align spiral cable correctly when installing steering wheel. Make
sure that the spiral cable is in the neutral position. The neutral
position is detected by turning left 2.5 revolutions from the right
end position and ending with the knob at the top.
• If equipped with VDC, refer to BRC-54, "
Adjustment of Steering
Angle Sensor Neutral Position" for steering angle sensor adjust-
ment.
• After the work is completed, perform self-diagnosis to make sure
no malfunction is detected. Refer to SRS-20, "
SRS Operation
Check".
• Tighten steering wheel center nut to specification. Refer to PS-10,
"Removal and Installation".
CAUTION:
• The spiral cable may snap due to steering operation if the
cable is not installed in the correct position.
• 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 counterclockwise about
2.5 turns from the neutral position.Tool number A: J-1859-A
B: J-42578
WHIA0124E
WGIA0038E
PHIA0275E

PS-16
< SERVICE INFORMATION >
POWER STEERING GEAR AND LINKAGE
7. Remove steering outer socket from steering knuckle using Tool.
Be careful not to damage ball joint boot.
CAUTION:
Temporarily tighten mounting nut to prevent damage to
threads and to prevent Tool from coming off.
8. On 2WD model, remove stabilizer bar mounting bolts and reposition stabilizer bar. Refer to FSU-12,
"Removal and Installation" .
9. Remove oil piping (high pressure side and low pressure side)
from steering gear assembly, then drain fluid from piping.
10. Remove lower joint mounting bolt of lower joint shaft.
11. Remove nuts of steering gear assembly using power tool, then
remove bolts and steering gear assembly.
INSTALLATION
Installation is in the reverse order of removal.
• After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-6, "
Front
Wheel Alignment" .
• After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-54, "
Adjust-
ment of Steering Angle Sensor Neutral Position" . Tool number : HT72520000 (J-25730-A)
SDIA1434E
LGIA0032E
LGIA0029E
LGIA0024E

RSU-1
SUSPENSION
C
D
F
G
H
I
J
K
L
M
SECTION RSU
A
B
RSU
N
O
PCONTENTS
REAR SUSPENSION
SERVICE INFORMATION ............................2
PRECAUTIONS ...................................................2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
2
Precaution for Rear Suspension ...............................2
PREPARATION ...................................................3
Commercial Service Tool ..........................................3
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING .............................
4
NVH Troubleshooting Chart ......................................4
CAN COMMUNICATION .....................................5
System Description ...................................................5
TROUBLE DIAGNOSIS ......................................6
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ........................................................
6
Component Parts and Harness Connector Loca-
tion ............................................................................
8
Wiring Diagram - A/SUSP - .......................................9
Basic Inspection ......................................................10
Chek Suspension Indicator Lamp Timing ...............11
Control Unit Input/Output Signal Standard ..............11
CONSULT-II Function (AIR LEVELIZER) ...............11
TROUBLE DIAGNOSIS FOR SELF-DIAG-
NOSTIC ITEMS ..................................................
14
Height Sensor System Inspection ...........................14
Exhaust Valve Solenoid System Inspection ............15
Compressor Motor, Compressor Motor Relay and
Circuit Inspection .....................................................
17
TROUBLE DIAGNOSES FOR SYMPTOMS ......19
Load Leveling Rear Air Suspension System Does
Not Operate .............................................................
19
Chek Suspension Indicator Lamp Stays On When
Ignition Switch Is Turned On ...................................
20
REAR SUSPENSION ASSEMBLY ...................21
Component ..............................................................21
On-Vehicle Inspection and Service .........................22
Wheel AlignmentInspection .....................................23
REAR SUSPENSION MEMBER .......................26
Removal and Installation .........................................26
SHOCK ABSORBER ........................................30
Removal and Installation .........................................30
SUSPENSION ARM ..........................................31
Removal and Installation .........................................31
FRONT LOWER LINK .......................................33
Removal and Installation .........................................33
REAR LOWER LINK & COIL SPRING .............35
Removal and Installation .........................................35
STABILIZER BAR .............................................37
Removal and Installation .........................................37
REAR LOAD LEVELING AIR SUSPENSION
COMPRESSOR ASSEMBLY ............................
38
Removal and Installation .........................................38
HEIGHT SENSOR .............................................40
Removal and Installation .........................................40
CONTROL UNIT ................................................42
Removal and Installation .........................................42
Initialization Procedure ............................................42
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
43
Wheel Alignment .....................................................43
Ball Joint ..................................................................43
Wheelarch Height (Unladen*1) ................................44

RSU-2
< SERVICE INFORMATION >
PRECAUTIONS
SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000003532652
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity 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 and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SRS section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
Precaution for Rear SuspensionINFOID:0000000003532653
• When installing the rubber bushings, the final tightening must be done under unladen condition and with the
tires on level ground. Oil will shorten the life of the rubber bushings, so wipe off any spilled oil immediately.
• Unladen condition means the fuel tank, engine coolant and lubricants are at the full specification. The spare
tire, jack, hand tools, and mats are in their designated positions.
• After installing suspension components, check the wheel alignment.
• Caulking nuts are not reusable. Always use new caulking nuts for installation. New caulking nuts are pre-
oiled, do not apply any additional lubrication.

RSU-4
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003532655
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
RSU-21RSU-30
—
—
—
RSU-21
RSU-23RSU-37
PR-3, "
NVH Troubleshooting Chart
"
RFD-7, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
"
BR-4, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
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
FRONT AXLE
FRONT SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
SymptomNoise×××××× ××× ××××××
Shake×××× × × × ××××××
Vibration××××× × × ×× × ×
Shimmy×××× × × ××× ××
Shudder ××× × ××× ××
Poor quality ride or handling××××× ×× × ×××

REAR SUSPENSION ASSEMBLY
RSU-23
< SERVICE INFORMATION >
C
D
F
G
H
I
J
K
L
MA
B
RSU
N
O
P
Wheel AlignmentInspectionINFOID:0000000003532671
Rear Wheel Alignment Adjusting Bolts
PRELIMINARY INSPECTION
WARNING:
Always adjust the alignment with the vehicle on a flat surface. Use CONSULT-II “EXHAUST SOLE-
NOID” active test to release the air pressure from the rear load leveling air suspension system.
NOTE:
If alignment is out of specification, 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. Refer to WT-5, "
Inspection" .
4. Check the wheel bearing axial end play.
5. Check the shock absorbers. Refer to RSU-30, "
Removal and Installation" .
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-44, "
Wheelarch Height (Unladen*1)" .
• If vehicle height is not within ± 10 mm (0.39 in) of the specification, perform the control unit initialization
procedure. Refer to RSU-42, "
Initialization Procedure" .
GENERAL INFORMATION AND RECOMMENDATIONS
1. A Four-Wheel Thrust Alignment should be performed.
• This type of alignment is recommended 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 capable 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.
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)