INFINITI QX56 2011 Factory Service Manual

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGWT-61
< SYMPTOM DIAGNOSIS >
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NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006225544
Use the chart below to find the cause of the symp tom. If necessary, repair or replace these parts.
×: ApplicableReference
WT-64, "
Exploded View
"
WT-64, "
Inspection
"
WT-62, "
Adjustment
"
WT-69, "
Tire Air Pressure
"
WT-64, "
Inspection
"
—
—
WT-69, "
Tire Air Pressure
"
NVH in DLN section.
NVH in DLN section.
NVH in FAX and FSU sections.
NVH in RAX and RSU sections.
Refer to TIRES in this chart.
Refer to ROAD WHEEL in this chart.
NVH in FAX, RAX section.
NVH in BR section.
NVH in ST section.
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Out-of-round
Unbalance
Incorrect tire pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
PROPELLER SHAFT
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR AXLE AND REAR SUSPENSION
TIRES
ROAD WHEELS
DRIVE SHAFT
BRAKE
STEERING
Symptom TIRESNoise
××××××× ×××× ××××
Shake ×××××× ×× ×× ××××
Vibration ×××××××
Shimmy ×××××××× ×× × ××
Judder ×
××××× × ×× × ××
Poor quality ride or
handling ×××××× × × ××
ROAD
WHEEL Noise
××× × ××××× ×××
Shake ××× × × ××× ×××
Shimmy, Judder ××× × ××× ××
Poor quality ride or
handling ××× × ×××
Revision: 2010 May2011 QX56

WT-62
< PERIODIC MAINTENANCE >
ROAD WHEEL
PERIODIC MAINTENANCE
ROAD WHEEL
AdjustmentINFOID:0000000006225545
BALANCING WHEELS (BONDING WEIGHT TYPE)
Preparation Before Adjustment
Using releasing agent, remove double-faced adhesive tape from the road wheel.
CAUTION:
 Be careful not to scratch the road wheel during removal.
 After removing double-faced adhesive tape, wi pe clean traces of releasing agent from the road
wheel.
Wheel Balance Adjustment
If a tire balance machine has adhesion balance weight m ode settings and drive-in weight mode setting, select
and adjust a drive-in weight mode suitable for road wheels.
1. Set road wheel on tire balance machine using the center hole as a guide. Start the tire balance machine.
2. When inner and outer unbalance values are shown on the tire balance machine indicator, multiply outer unbalance value by 5/3 to determine balance weight t hat should be used. Select the outer balance weight
with a value closest to the calculated value above and in stall to the designated outer position of, or at the
designated angle in relation to the road wheel.
CAUTION:
 Never install the inner balance weight be fore installing the outer balance weight.
 Before installing the balance weight, always to clean the mating surface of the road wheel.
a. Indicated unbalance value × 5/3 = balance weight to be installed
Calculation example:
23 g (0.81 oz) × 5/3 = 38.33 g (1.35 oz) ⇒ 37.5 g (1.32 oz) bal-
ance weight (closer to calculated balance weight value)
NOTE:
Note that balance weight value must be closer to the calculated
balance weight value.
Example:
36.2 ⇒ 35 g (1.23 oz)
36.3 ⇒ 37.5 g (1.32 oz)
b. Installed balance weight in the position.
SMA054D
Revision: 2010 May2011 QX56

ROAD WHEELWT-63
< PERIODIC MAINTENANCE >
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 When installing balance weight (1) to road wheels, set it into the grooved area (A) on the inner wall of the road wheel as
shown in the figure so that the balance weight center (B) is
aligned with the tire balance machine indication position
(angle) (C).
CAUTION:
 Always use genuine NISSAN ad hesion balance weights.
 Balance weights are non-re usable; always replace with
new ones.
 Never install more than four sheets of balance weight.
c. If calculated balance weight value exceeds 50 g (1.76 oz), install two balance weight sheets in line with each other as shown in
the figure.
CAUTION:
Never install one balance weight sheet on top of another.
3. Start the tire balance machine again.
4. Install drive-in balance weight on inner side of road wheel in the tire balance machine indication position (angle).
CAUTION:
Never install more than two balance weight.
5. Start the tire balance machine. Check that the inner and outer residual unbalance value is within the allowable unbalance
value.
CAUTION:
If either residual unbalan ce value exceeds limit, repeat installation procedures.
Tire RotationINFOID:0000000006225546
 Follow the maintenance schedule for tire rotation service intervals.
Refer to MA-4, "
Explanation of General Maintenance".
 When installing the wheel, tighten wheel nuts to the specified torque. Refer to WT-64, "
Exploded View".
CAUTION:
 When installing wheels, tighte n them diagonally by dividing
the work two to three times in order to prevent the wheels
from developing any distortion.
 Be careful not to tighten wh eel nut at torque exceeding the
criteria.
 Use NISSAN genuine wheel nuts for aluminum wheels.
 Perform the ID registration, after tire rotation. Refer to WT-29,
"Work Procedure".
JPEIC0040ZZ
Allowable unbalance value
Dynamic (At flange) : Refer to WT-69, "
Road Wheel".
Static (At flange) : Refer to WT-69, "
Road Wheel".
PEIA0033E
SMA829C
Revision: 2010 May2011 QX56

WT-64
< REMOVAL AND INSTALLATION >
ROAD WHEEL TIRE ASSEMBLY
REMOVAL AND INSTALLATION
ROAD WHEEL TIRE ASSEMBLY
Exploded ViewINFOID:0000000006225547
Removal and InstallationINFOID:0000000006225548
REMOVAL
1. Remove wheel nuts.
2. Remove tire assembly.
INSTALLATION
Note the following, install in the reverse order of removal.
 When replacing or rotating wheels, perform the ID registration. Refer to WT-29, "
Work Procedure".
InspectionINFOID:0000000006225549
ALUMINUM WHEEL
1. Check tires for wear and improper inflation.
2. Check wheels for deformation, cracks and other damage. If deformed, remove wheel and check wheel
runout.
a. Remove tire from aluminum wheel and mount on a tire balance machine.
b. Set dial indicator as shown in the figure.
c. Check radial runout, if the latera l deflection (A) or vertical deflec-
tion (B) for radial runout value exceeds the limit, replace alumi-
num wheel.
1. Tire assembly
Refer to GI-4, "
Components" for symbols in the figure.
JPEIC0088GB
Limit
Lateral deflection (A) : Refer to WT-69, "
Road Wheel".
Vertical deflection (B) : Refer to WT-69, "
Road Wheel".
SEIA0737E
Revision: 2010 May2011 QX56

LOW TIRE PRESSURE WARNING CONTROL UNIT
WT-65
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LOW TIRE PRESSURE WA RNING CONTROL UNIT
Exploded ViewINFOID:0000000006225550
Removal and InstallationINFOID:0000000006225551
REMOVAL
1. Remove the glove box assembly. Refer to IP-14, "Removal and Installation".
2. Remove the instrument lower panel RH. Refer to IP-14, "
Removal and Installation".
3. Disconnect low tire pressure warning control unit connector.
4. Remove the low tire pressure warning control unit control unit.
INSTALLATION
Note the following, install in the reverse order of removal.
 Perform ID registration after replacing low tire pressure warning control unit. Refer to WT-29, "
Work Proce-
dure".
1. Low tire pressure warning control unit 2. Bracket
: Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JPEIC0072ZZ
Revision: 2010 May2011 QX56

WT-66
< REMOVAL AND INSTALLATION >
TRANSMITTER
TRANSMITTER
Exploded ViewINFOID:0000000006225552
Removal and InstallationINFOID:0000000006225553
REMOVAL
1. Deflate tire. Unscrew transmitter retaining nut and allow transmitter to fall into tire.
2. Gently bounce tire so that trans mitter falls to bottom of tire.
Place on tire changing machine and break both tire beads
ensuring that the transmitter remains at the bottom of the tire.
3. Turn tire so that valve hole is at bottom and bounce so that transmitter (1) is near valve hole. Carefully lift tire onto turntable
and position valve hole (and transmitter) 270 degree from
mounting/dismounting head (2).
4. Lubricate tire well and remove first side of the tire. Reach inside the tire and remove the transmitter.
INSTALLATION
JPEIC0081GB
1. Transmitter 2. Grommet seal 3. Valve nut
4. Valve core 5. Cap
Refer to GI-4, "
Components" for symbols in figure.
SEIA0047E
JPEIC0014GB
Revision: 2010 May2011 QX56

TRANSMITTERWT-67
< REMOVAL AND INSTALLATION >
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1. Put first side of tire onto rim.
2. Mount transmitter on rim and tighten nut. CAUTION:
Speed for tightening nut sh ould be less than 10 rpm.
3. Place wheel on turntable of tire machine. Ensure that transmitter (1) is 270 degree from mounting head (2) when second side of
tire is fitted.
NOTE:
Do not touch transmitter at mounting head.
4. Lubricate tire well and fit second side of tire as normal. Ensure that tire does not rotate relative to rim.
5. Inflate tire and fit to appropriate wheel position.
6. Perform the transmitter wake-up after replacing transmitter. Refer to WT-28, "
Work Procedure".
SEIA0049E
JPEIC0014GB
Revision: 2010 May2011 QX56

WT-68
< REMOVAL AND INSTALLATION >
TIRE PRESSURE RECEIVER
TIRE PRESSURE RECEIVER
Exploded ViewINFOID:0000000006225554
FRONT TIRE PRESSURE RECEIVER
FRONT TIRE PRESSURE RECEIVER : Removal and InstallationINFOID:0000000006225555
REMOVAL
1. Remove fender protector (rear). Refer to EXT-23, "FENDER PROTECTOR : Removal and Installation".
2. Remove mounting bolt for the front tire pressure receiver.
3. Disconnect front tire pressure receiver harness connector.
4. Remove front tire pressure receiver.
INSTALLATION
Installation is the reverse order of removal.
REAR TIRE PRESSURE RECEIVER
REAR TIRE PRESSURE RECEIVER : Removal and InstallationINFOID:0000000006225556
REMOVAL
1. Remove rear wheel house protector. Refer to EXT-24, "REAR WHEEL HOUSE PROTECTOR : Removal
and Installation".
2. Remove mounting bolt for the rear tire pressure receiver.
3. Disconnect rear tire pressure receiver harness connector.
4. Remove rear tire pressure receiver.
INSTALLATION
Installation is the reverse order of removal.
1. Front tire pressure receiver 2. Rear tire pressure receiver
: Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JSEIA0010GB
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
WT-69
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Road WheelINFOID:0000000006225557
ALUMINUM WHEEL
Tire Air PressureINFOID:0000000006225558
Unit: kPa (kg/cm2, psi)
Item Limit
Radial runout Lateral deflection
Less than 0.3 mm (0.012 in)
Vertical deflection
Allowable unbalance Dynamic (At flange) Less than 7 g (0.25 oz) (one side)
Static (At flange) Less than 14 g (0.49 oz)
Tire size Air pressure
Front Rear
P275/60R20 114H 240 (2.4, 35)
P275/50R22 111H 240 (2.4, 35)
Revision: 2010 May2011 QX56

WW-1
DRIVER CONTROLS
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CONTENTS
WIPER & WASHER
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Precaution for Procedure without Cowl Top Cover ......4
SYSTEM DESCRIPTION ..............................5
COMPONENT PARTS ................................... .....5
Component Parts Location .................................. ......5
Component Description ............................................6
Washer Switch ..........................................................6
SYSTEM ..............................................................7
FRONT WIPER AND WASHER SYSTEM ............. ......7
FRONT WIPER AND WASHER SYSTEM : Sys-
tem Diagram ..............................................................
7
FRONT WIPER AND WASHER SYSTEM : Sys-
tem Description .........................................................
7
FRONT WIPER AND WASHER SYSTEM : Fail-
safe ...........................................................................
9
REAR WIPER AND WASHER SYSTEM ............... ....10
REAR WIPER AND WASHER SYSTEM : System
Diagram ...................................................................
10
REAR WIPER AND WASHER SYSTEM : System
Description ..............................................................
10
REAR WIPER AND WASHER SYSTEM :
Fail Safe .................................................................
12
HEADLAMP WASHER SYSTEM .......................... ....12
HEADLAMP WASHER SYSTEM : System Dia-
gram ........................................................................
13
HEADLAMP WASHER SYSTEM : System De-
scription ...................................................................
13
DIAGNOSIS SYSTEM (BCM) ............................14
COMMON ITEM ..................................................... ....14
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
14
WIPER .................................................................... ....15
WIPER : CONSULT-III Function (BCM - WIPER) ....15
DIAGNOSIS SYSTEM (IPDM E/R) ...................18
Diagnosis Description ..............................................18
CONSULT-III Function (IPDM E/R) .........................20
ECU DIAGNOSIS INFORMATION ..............23
BCM, IPDM E/R .................................................23
List of ECU Reference ......................................... ....23
WIRING DIAGRAM ......................................24
WIPER AND WASHER SYSTEM .....................24
Wiring Diagram .................................................... ....24
BASIC INSPECTION ...................................33
DIAGNOSIS AND REPAIR WORKFLOW ........33
Work Flow ............................................................ ....33
DTC/CIRCUIT DIAGNOSIS .........................35
WIPER AND WASHER FUSE ...........................35
Diagnosis Procedure ........................................... ....35
FRONT WIPER MOTOR LO CIRCUIT ..............36
Component Function Check ....................................36
Diagnosis Procedure ...............................................36
FRONT WIPER MOTOR HI CIRCUIT ...............37
Component Function Check ....................................37
Diagnosis Procedure ...............................................37
FRONT WIPER AUTO STOP SIGNAL CIR-
CUIT ..................................................................
38
Component Function Check ....................................38
Diagnosis Procedure ...............................................38
Revision: 2010 May2011 QX56