2008 INFINITI QX56 wheel

WT-6
< BASIC INSPECTION >
INSPECTION AND ADJUSTMENT
3. When the BCM finishes assigning each tire ID, the BCM flashes the hazard warning lamps and sendsflashing indicator status by CAN according to the following time chart.
4. After completing wake up of all transmitters, make sure low tire pressure warning lamp goes out.
ID Registration ProcedureINFOID:0000000001735374
ID REGISTRATION WITH TRANSMITTER ACTIVATION TOOL
NOTE:
This procedure must be done after replacement of a low tire pressure warning transmitter or BCM.
New replacement transmitters are provided "asleep" and must first be "woken up" using Transmitter
Activation Tool J-45295 before ID registration can be performed.
1. Connect CONSULT-III.
2. Select "ID REGIST" under BCM.
3. Push the transmitter activation tool against the tire near the front left transmitter. Press the button for 5 seconds.
4. Register the IDs in order from FR LH, FR RH, RR RH and RR LH. When ID registration of each wheel has been completed, the hazard warning lamps flash.
5. After completing all ID registrations, press “END” to complete the procedure.
NOTE:
Be sure to register all of the IDs in order from FR LH, FR RH, RR RH, to RR LH, or the self-diagnostic results
display will not function properly.
ID REGISTRATION WITHOUT TRANSMITTER ACTIVATION TOOL
NOTE:
WEIA0177E
Tool number : (J-45295)
LEIA0036E
Step Activation tire position Hazard warning lamp CONSULT-III
1 Front LH
2 times flashing “YET”
↓
“DONE”
2F
ro n t R H
3R ear R H
4 Rear LH
Revision: March 2010 2008 QX56

WT-8
< FUNCTION DIAGNOSIS >
TPMS
FUNCTION DIAGNOSIS
TPMS
System DiagramINFOID:0000000001735375
System DescriptionINFOID:0000000001735376
BODY CONTROL MODULE (BCM)
The BCM is shown with the lower instrument panel LH removed. The
BCM reads the air pressure signal received by the remote keyless
entry receiver, and controls the low tire pressure warning lamp as
shown below. It also has a self-d iagnosis function to detect a system
malfunction.
TRANSMITTER
A sensor-transmitter integrated with a valve is installed in each
wheel, and transmits a detected air pr essure signal in the form of a
radio wave. The radio signal is received by the remote keyless entry
receiver.
REMOTE KEYLESS ENTRY RECEIVER
ALEIA0004GB
Condition Low tire pressure warning lamp
System normal On for 1 second after ignition ON
Tire less than 193 kPa (2.0 kg/cm
2 , 28 psi)
[Flat tire] ON
TPMS malfunction After key ON, flashes once per sec-
ond for 1 minute, then stays ON
LEIA0068E
WEIA0137E
Revision: March 2010 2008 QX56

TPMSWT-9
< FUNCTION DIAGNOSIS >
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The remote keyless entry receiver is shown with the instrument
panel RH removed. The remote keyless entry receiver receives the
air pressure signal transmitted by the transmitter in each wheel.
COMBINATION METER
The combination meter receives tire pressure status from the BCM
using CAN communication. When a low tire pressure condition is
sensed by the BCM, the combination meter low tire pressure warn-
ing lamp is activated.
TIRE PRESSURE WARNING CHECK CONNECTOR
The tire pressure warning check connector can be grounded in order
to initiate self-diagnosis without a CONSULT-III. Refer to WT-12,
"Self-Diagnosis (Without CONSULT-III)". The tire pressure warning
check connector is located behind the lower portion of the instrument
panel LH.
DISPLAY UNIT
Displays the air pressure of each tire.
NOTE:
After the ignition switch is turned on, the pressure values will not be
displayed until the data of each wheel is received.
LEIA0069E
LEIA0055E
LEIA0068E
AWEIA0017GB
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (BCM)WT-11
< FUNCTION DIAGNOSIS >
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DIAGNOSIS SYSTEM (BCM)
CONSULT-III Function (BCM)INFOID:0000000001735378
CONSULT-III DIAGNOSTIC MODES
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
DESCRIPTION
During driving, the tire pressure monitoring system receives the signal transmitted from the transmitter
installed in each wheel, and turns on the low tire pressure warning lamp when the tire pressure becomes low.
The control unit (BCM) for this system has pr essure judgement and self-diagnosis functions.
FUNCTION
When the tire pressure monitoring system detects low infl ation pressure or an internal malfunction, the low tire
pressure warning lamp in the combination meter comes on. The malfunction is indicated by the low tire pres-
sure warning lamp flashing.
CONSULT-III Application to Ti re Pressure Monitoring System
× : Applicable
– : Not applicable
Data Monitor Mode
Diagnostic mode Description
WORK SUPPORT Supports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are re-
ceived from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
ITEMSELF-DIAGNOSTIC RESULTS DATA MONITOR
Front - Left transmitter ××
Front - Right transmitter ××
Rear - Left transmitter ××
Rear - Right transmitter ××
Warning lamp —×
Vehicle speed ××
CAN Communication ××
MONITORCONDITION SPECIFICATION
VHCL SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL • Drive vehicle for a few minutes.
Tire pressure (kPa or psi)
or
• Ignition switch ON and activation tool is transmitting activation signals.
Revision: March 2010 2008 QX56

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGWT-41
< SYMPTOM DIAGNOSIS >
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NOISE, VIBRATION AND HARSHN ESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000001534675
Use the chart below to help you find t he cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
WT-45WT-48WT-51WT-48—
—
WT-51
DLN-206, "
NVH Troubleshooting Chart
" (FFD),
DLN-240, "
NVH Troubleshooting Chart
" (RFD)
FAX-5, "
NVH Troubleshooting Chart
" (FAX),
FSU-6, "
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: March 2010 2008 QX56

WT-42
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004884205
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:0000000004884204
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.
Revision: March 2010 2008 QX56

WT-44
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000001534673
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000001534674
Tool number
(Kent-Moore No.)
Tool name Description
KV991B1000
(J-45295)
Transmitter activation tool • Transmitter wake up operation
• ID registration procedure
WEIA0144E
Tool name
Description
Power tool Removing wheel nuts
PBIC0190E
Revision: March 2010 2008 QX56

WHEELWT-45
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
WHEEL
InspectionINFOID:0000000001534676
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 wheel and mount wheel on a tire balance machine.
b. Set dial indicator as shown. Refer to WT-51, "
Road Wheel" .
3. Check front wheel bearings for looseness.
4. Check front suspension for looseness.
SFA975B
Revision: March 2010 2008 QX56