2010 INFINITI QX56 steering

WCS-2
Wiring Diagram .......................................................23
ECU DIAGNOSIS ..................................... ...28
COMBINATION METER ................................. ...28
Reference Value .................................................. ...28
Wiring Diagram .......................................................30
Fail Safe .................................................................47
DTC Index ..............................................................48
BCM (BODY CONTROL MODULE) ..................50
Reference Value .................................................. ...50
Terminal Layout ......................................................53
Physical Values ......................................................53
Wiring Diagram .......................................................59
Fail Safe .................................................................63
DTC Inspection Priority Chart ..............................64
DTC Index ........................................................... ...64
SYMPTOM DIAGNOSIS .............................66
THE LIGHT REMINDER WARNING DOES
NOT SOUND ................................................... ...
66
Description ........................................................... ...66
Diagnosis Procedure ...............................................66
THE SEAT BELT WARNING CONTINUES
SOUNDING, OR DOES NOT SOUND ...............
67
Description ........................................................... ...67
Diagnosis Procedure ...............................................67
THE KEY WARNING DOES NOT SOUND .......68
Description ........................................................... ...68
Diagnosis Procedure ...............................................68
PRECAUTION ............................................69
PRECAUTIONS .............................................. ...69
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
69
Necessary for Steering Wheel Rotation After Bat-
tery Disconnect .................................................... ...
69
Revision: April 20092010 QX56

WCS
PRECAUTIONSWCS-69
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005238466
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 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 SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, 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 in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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 minutes before performing any service.
Necessary for Steering Wheel Ro tation After Battery DisconnectINFOID:0000000005238467
NOTE:
• Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both 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.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnect ed or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the procedure
below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Carry the Intelligent Key or insert it to the key slot and 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 will remain released with both battery cables discon- nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
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.)
Revision: April 20092010 QX56

WT-2
Low Tire Pressure Warning Lamp Flashes When
Ignition Switch Is Turned On ..................................
39
HAZARD WARNING LAMPS FLASH ...............40
Hazard Warning Lamps Flash When Ignition
Switch Is Turned On ............................................ ...
40
"TIRE PRESSURE" INFORMATION IN DIS-
PLAY UNIT DOES NOT EXIST .........................
41
"TIRE PRESSURE" Information in Display Unit
Does Not Exist ..................................................... ...
41
ID REGISTRATION CANNOT BE COMPLET-
ED ......................................................................
42
ID Registration Cannot Be Completed ................ ...42
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ...
43
NVH Troubleshooting Chart ................................ ...43
PRECAUTION .............................................44
PRECAUTIONS .............................................. ...44
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
44
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
44
PREPARATION ..........................................46
PREPARATION .............................................. ...46
Special Service Tool ............................................ ...46
Commercial Service Tool ........................................46
ON-VEHICLE MAINTENANCE ..................47
WHEEL ........................................................... ...47
Inspection ............................................................. ...47
ON-VEHICLE REPAIR ...............................48
WHEEL AND TIRE ASSEMBLY .................... ...48
Balancing Wheels ................................................ ...48
Rotation ...................................................................49
REMOVAL AND INSTALLATION ..............50
REMOVAL AND INSTALLATION .................. ...50
Transmitter (Pressure Sensor) ............................. ...50
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................. ...............
52
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
52
Road Wheel ......................................................... ...52
Tire ..........................................................................52
Revision: April 20092010 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGWT-43
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NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000005148241
Use the chart below to help you find t he cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
WT-47WT-48WT-52WT-49—
—
WT-52
FA X - 5 , "
NVH Troubleshooting Chart
" (FFD),
RAX-5, "
NVH Troubleshooting Chart
" (RFD)
FA X - 5 , "
NVH Troubleshooting Chart
" (FAX),
FSU-5, "
NVH Troubleshooting Chart
" (FSU)
RAX-5, "
NVH Troubleshooting Chart
" (RAX),
RSU-5, "
NVH Troubleshooting Chart
" (RSU)
Refer to TIRES in this chart.
Refer to ROAD WHEEL in this chart.
BR-6, "
NVH Troubleshooting Chart
"
ST-12, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Out-of-round
Imbalance
Incorrect tire pressure
Uneven tire wear
Deformation or damage
Non-uniformity
Incorrect tire size
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR AXLE AND REAR SUSPENSION
TIRES
ROAD WHEEL
BRAKE
STEERING
Symptom TIRESNoise
× ××××× × × ×× ××
Shake × ×××× × × ×× ××
Vibration ××× ×××
Shimmy × ×××××× × ×× ××
Shudder × ×××× × × ×× ××
Poor quality ride or
handling × ×××× × × ××
ROAD
WHEEL Noise
×× × ××× ×××
Shake ×× × ×× ×××
Shimmy, shudder ×× × ×× ×××
Poor quality ride or
handling ×× ×
×× ×
Revision: April 20092010 QX56

WT-44
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005229917
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 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 w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 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 SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified 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 Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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:0000000005229918
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
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PRECAUTIONSWT-45
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5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Revision: April 20092010 QX56

REMOVAL AND INSTALLATIONWT-51
< REMOVAL AND INSTALLATION >
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3. Place wheel on turntable of tire machine. Ensure that transmitter
is 270 degrees from mounting/dismounting head.
NOTE:
Do not touch transmitter with mounting head.
4. Lubricate tire well, and install second side of tire as normal. Ensure that tire does not rotate relative to rim.
5. Inflate tire and balance the wheel and tire assembly. Refer to WT-48, "
Balancing Wheels" .
6. Install Wheel and tire assembly in appropriate wheel position on vehicle.
NOTE:
If replacing the transmitter, t hen transmitter wake up operation
must be performed. Refer to WT-5, "
Transmitter Wake Up Operation" .
7. Adjust neutral position of steering angle sensor. Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE
SENSOR NEUTRAL POSITION : Special Repair Requirement" .
WEIA0046E
Revision: April 20092010 QX56

WW-2
Reference Value .....................................................57
Terminal Layout ......................................................59
Physical Values ......................................................60
Wiring Diagram .......................................................65
Fail Safe .................................................................68
DTC Index ..............................................................70
SYMPTOM DIAGNOSIS .............................71
WIPER AND WASHER SYSTEM SYMPTOMS
...
71
Symptom Table ................................................... ...71
NORMAL OPERATING CONDITION ................74
Description ........................................................... ...74
FRONT WIPER DOES NOT OPERATE ............75
Description ........................................................... ...75
Diagnosis Procedure ..............................................75
PRECAUTION .............................................77
PRECAUTION ... .............................................. ...77
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
77
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
77
ON-VEHICLE REPAIR ................................79
FRONT WIPER ARM ...................................... ...79
Front Wiper Arms ................................................. ...79
FRONT WIPER DRIVE ASSEMBLY .................80
Wiper Motor and Linkage ..................................... ...80
FRONT WASHER TUBE ...................................81
Washer Tube Layout ............................................ ...81
FRONT WASHER NOZZLE ..............................82
Washer Nozzle Adjustment .................................. ...82
WASHER TANK ................................................83
Washer Fluid Reservoir ..........................................83
FRONT WASHER PUMP ..................................84
Washer Motor ...................................................... ...84
FRONT WIPER AND WASHER SWITCH .........85
Wiper and Washer Switch .................................... ...85
REAR WIPER AND WASHER SYSTEM ...........86
Rear Wiper Arm ................................................... ...86
Rear Wiper Motor ....................................................86
Rear Washer Nozzle Adjustment ............................87
Rear Washer Tube Layout ......................................88
Rear Washer Nozzle ...............................................88
Rear Wiper and Washer Switch ..............................88
Washer Fluid Reservoir ....................................... ...89
Washer Motor .........................................................89
Revision: April 20092010 QX56