2011 INFINITI QX56 service

PREPARATIONFL-3
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000006289680
Commercial Service ToolsINFOID:0000000006289681
Tool number
(Kent-Moore No.)
Tool name
Description
KV10119800
(J-45722)
Fuel tank lock ring wrench Removing and installing fuel tank rock ring
a: 187 mm (7.36 in)
NOTE:
The actual shapes of Kent-Moore No. tools
may differ from those of the special tools illus-
trated here.
JSBIA0383ZZ
Tool name Description
Power tool Loosening bolts and nuts
PBIC0190E
Revision: 2010 May2011 QX56

EVAP CANISTERFL-11
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NOTE:
Do not use soapy water or any type of solvent while installing vacuum hose or purge hoses.
1. EVAP canister purge volume control
solenoid valve 2. EVAP purge resonator 3. EVAP service port
4. EVAP canister 5. EVAP control system pressure sen- sor6. EVAP canister vent control valve
JSBIA0613ZZ
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Fuel TankINFOID:0000000006289690
Standard and Limit
Fuel tank capacity
Approx. 98.4 (26 US gal)
Fuel recommendation Refer to GI-31, "
Fuel"
Revision: 2010 May2011 QX56

FSU-1
SUSPENSION
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SECTION FSU
A
B
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

FSU-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006225636
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsINFOID:0000000006225637
Tool number
(Kent-Moore No.)
Tool name Description
ST35652000
( − )
Shock absorber attachment Disassembling and assembling shock
absorber
ST3127S000
(J-25765-A)
Preload gauge Measuring rotating torque of ball joint
ZZA0807D
ZZA0806D
Tool name
Description
Power tool Loosening bolts and nuts
Spring compressor Removing and installing coil spring
PBIC0190E
S-NT717
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

FRONT COIL SPRING AND SHOCK ABSORBERFSU-11
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12. Separate drive shaft from steering knuckle. (4WD) Refer to FAX-22, "Removal and Installation".
13. Remove front tube assembly A and front tube asse mbly B from shock absorber. (With HBMC) Refer to
SCS-32, "
FRONT TUBE ASSEMBLY : Removal and Installation".
14. Remove shock absorber.
15. Perform inspection after removal. (With HBMC) Refer to FSU-12, "
Inspection and Adjustment".
INSTALLATION
Note the following, and install in the reverse order of removal.
 Never tap on the ball joint cap of the stabilizer connecting rod with a hammer or a similar item when inserting
the stabilizer connecting rod into the lower link. (Without HBMC)
 Perform final tightening of bolts and nuts at the shock absorber lower side (rubber bushing), under unladen
conditions with tires on level ground.
 Perform inspection after installation. Refer to FSU-12, "
Inspection and Adjustment".
 Perform adjustment after installation. (With HBMC) Refer to FSU-12, "
Inspection and Adjustment".
 After replacing the shock absorber, always follow the disposal procedure to discard the shock absorber.
Refer to FSU-13, "
Disposal".
Disassembly and AssemblyINFOID:0000000006273960
CAUTION:
The shock absorber assembly can not be disassembled. (With HBMC)
DISASSEMBLY (WITHOUT HBMC)
CAUTION:
Never damage shock absorber piston rod wh en removing components from shock absorber.
1. Install shock absorber attachment [SST: ST35652000 ( −)]
(A) to shock absorber and secure it in a vise.
CAUTION:
When installing the shock ab sorber attachment to shock
absorber, wrap a shop cloth around shock absorber to pro-
tect it from damage.
2. Using a spring compressor (commercial service tool) (A), com- press coil spring between rubber seat and shock absorber until
coil spring with a spring compressor is free.
CAUTION:
Be sure a spring compresso r is securely attached coil
spring. Compress coil spring
3. Check coil spring with a spring compressor between rubber seat and shock absorber is free. And then remove piston rod lock nut
while securing the piston rod tip so that piston rod does not turn.
4. Remove washer, bushings, shock absorber mounting bracket, tube, rubber seat, bound bumper cover, dust cover from shock
absorber.
5. After removing coil spring with a spring compressor, then gradually release a spring compressor. CAUTION:
Loosen while making sure coil spri ng attachment position does not move.
6. Remove the shock absorber at tachment from shock absorber.
7. Perform inspection after disassembly. Refer to FSU-12, "
Inspection and Adjustment".
ASSEMBLY (WITHOUT HBMC)
1. Install shock absorber attachment [SST: ST35652000 ( −)] to shock absorber and secure it in a vise.
CAUTION:
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Revision: 2010 May2011 QX56