INFINITI QX56 2011 Factory Service Manual

FL-12
< REMOVAL AND INSTALLATION >
EVAP CANISTER
Removal and Installation
INFOID:0000000006414454
REMOVAL
1. Remove the spare tire.
2. Disconnect harness connectors and hoses.
3. Remove EVAP canister fixing bolt.
4. Remove EVAP canister.
NOTE:
The EVAP canister vent control valve and EVAP cont rol system pressure sensor can be removed without
removing the EVAP canister.
INSTALLATION
Install in the reverse order of removal.
NOTE:
Tighten EVAP canister fixing bolt to the specified torque.
Disassembly and AssemblyINFOID:0000000006414455
DISASSEMBLY
1. Disengage the pawl and turn EVAP canister vent control valve counterclockwise.
 Lock (A)
Unlock (B)
2. Remove the EVAP canister vent control valve.
ASSEMBLY
Assemble in the reverse order of disassembly.
CAUTION:
Always replace O-ring with a new one.
InspectionINFOID:0000000006414456
Check EVAP canister as per the following:
1. Block port (B).
2. Blow air into port (A) and check that it flows freely out of port (C).
3. Release blocked port (B).
4. Apply vacuum pressure to port (B) and check that vacuum pres- sure exists at the ports (A) and (C).
5. Block port (A) and (B).
6. Apply pressure to port (C) and check that there is no leakage.
JSBIA0690ZZ
JSBIA0691ZZ
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
FL-13
< SERVICE DATA AND SPECIFICATIONS (SDS)
C
D E
F
G H
I
J
K L
M A
FL
NP
O
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
C
DF
G H
I
J
K L
M
SECTION FSU
A
B
FSU
N
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

PRECAUTIONSFSU-3
< PRECAUTION >
C
DF
G H
I
J
K L
M A
B
FSU
N
O P
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

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

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGFSU-5
< SYMPTOM DIAGNOSIS >
C
DF
G H
I
J
K L
M A
B
FSU
N
O P
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 >
C
DF
G H
I
J
K L
M A
B
FSU
N
O P
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
JPEIA0235ZZ
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