2008 INFINITI QX56 battery

AV
PRECAUTIONSAV-161
< PRECAUTION > [AUDIO SYSTEM]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004834913
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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000004834914
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 disconnecti ng 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 power 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

AV-162
< PRECAUTION >[AUDIO SYSTEM]
PRECAUTIONS
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 a ll control units using CONSULT-III.
Revision: March 2010 2008 QX56

AV
AV CONTROL UNITAV-165
< ON-VEHICLE REPAIR > [AUDIO SYSTEM]
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Only remove and replace the A/C or AV switch assembly knobs if damaged or missing. The knobs
must not be removed from the switches when removi ng and installing the A/C or AV switch assembly
to prevent damage to the switch assembly.
REMOVAL
1. Disconnect the battery negative terminal.
2. Remove the cluster lid C. Refer to IP-15, "
Removal and Installation".
3. Remove the AV control unit screws, using a power tool.
4. Remove the AV control unit.
5. Remove the A/C and AV switch assembly screws, t hen remove the A/C and AV switch assembles as nec-
essary.
INSTALLATION
Installation is in the reverse order of removal.
Revision: March 2010 2008 QX56

AV
DVD PLAYERAV-173
< ON-VEHICLE REPAIR > [AUDIO SYSTEM]
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DVD PLAYER
Removal and InstallationINFOID:0000000001601498
REMOVAL
1. Disconnect the battery negative terminal.
2. Remove the center console bin. Refer to IP-20, "
Removal and Installation".
3. Remove the DVD player screws (A) and remove the DVD player (1).
INSTALLATION
Installation is in the reverse order of removal.
ALNIA0271ZZ
Revision: March 2010 2008 QX56

AV-184
< ON-VEHICLE REPAIR >[AUDIO SYSTEM]
REAR VIEW CAMERA CONTROL UNIT
REAR VIEW CAMERA CONTROL UNIT
Removal and InstallationINFOID:0000000001612980
REMOVAL
1. Disconnect the battery negative terminal.
2. Remove the luggage side finishers LH. Refer to
INT-19,
"Removal and Installation".
3. Disconnect the rear view camera control unit electrical connec- tor.
4. Remove the two screws and remove the rear view camera con- trol unit.
INSTALLATION
Installation is in the reverse order of removal.
LKIA0478E
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BCS-2
COMB SW .................................................................24
COMB SW : CONSULT-III Function (BCM -
COMB SW) .............................................................
24
IMMU ...................................................................... ...25
IMMU : CONSULT-III Function (BCM - IMMU) .......25
BATTERY SAVER ................................................. ...25
BATTERY SAVER : CONSULT-III Function (BCM
- BATTERY SAVER) ........................................... ...
25
TRUNK ................................................................... ...26
TRUNK : CONSULT-III Function (BCM - TRUNK) ...26
RETAINED PWR .................................................... ...26
RETAINED PWR : CONSULT-III Function (BCM -
RETAINED PWR) ...................................................
26
SIGNAL BUFFER ................................................... ...26
SIGNAL BUFFER : CONSULT-III Function (BCM
- SIGNAL BUFFER) ................................................
26
AIR PRESSURE MONITOR ................................... ...27
AIR PRESSURE MONITOR : Diagnosis Descrip-
tion ..........................................................................
27
AIR PRESSURE MONITOR : CONSULT-III Func-
tion ....................................................................... ...
28
THEFT ALM ........................................................... ...29
THEFT ALM : CONSULT-III Function (BCM -
THEFT ALM) ..........................................................
29
COMPONENT DIAGNOSIS ........................30
U1000 CAN COMM CIRCUIT ......................... ...30
Description ........................................................... ...30
DTC Logic ...............................................................30
Diagnosis Procedure ..............................................30
U1010 CONTROL UNIT (CAN) .........................31
DTC Logic ............................................................ ...31
Diagnosis Procedure ..............................................31
Special Repair Requirement ...................................31
POWER SUPPLY AND GROUND CIRCUIT .. ...32
Diagnosis Procedure ............................................ ...32
COMBINATION SWITCH INPUT CIRCUIT .......33
Diagnosis Procedure ...............................................33
Special Repair Requirement ...................................34
COMBINATION SWITCH OUTPUT CIRCUIT ...35
Diagnosis Procedure ...............................................35
Special Repair Requirement ...................................35
COMBINATION SWITCH ..................................36
Description ........................................................... ...36
Diagnosis Procedure ...............................................36
ECU DIAGNOSIS .......................................38
BCM (BODY CONTROL MODULE) ............... ...38
Reference Value .................................................. ...38
Terminal Layout ......................................................40
Physical Values .......................................................40
Wiring Diagram .......................................................46
Fail Safe .................................................................49
DTC Inspection Priority Chart ...............................50
DTC Index ..............................................................50
SYMPTOM DIAGNOSIS ............................52
COMBINATION SWITCH SYSTEM SYMP-
TOMS .............................................................. ...
52
Symptom Table .................................................... ...52
PRECAUTION ............................................53
PRECAUTIONS .............................................. ...53
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
53
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ..................................
53
ON-VEHICLE REPAIR ...............................55
BCM (BODY CONTROL MODULE) ............... ...55
Removal and Installation .........................................55
Revision: March 2010 2008 QX56

BCS
BODY CONTROL SYSTEMBCS-5
< FUNCTION DIAGNOSIS > [BCM]
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FUNCTION DIAGNOSIS
BODY CONTROL SYSTEM
System DescriptionINFOID:0000000001696402
OUTLINE
• BCM (Body Control Module) controls the various electrical components. It inputs the information required to
the control from CAN communication and the signal received from each switch and sensor.
• BCM has combination switch reading function for reading the operation status of combination switches (light,
turn signal, wiper and washer) in addition to a function fo r controlling the operation of various electrical com-
ponents. It also has the signal transmission function as the passed point of signal and the power consump-
tion control function that reduces the power consumption with the ignition switch OFF.
• BCM is equipped with the diagnosis function that perfo rms the diagnosis with CONSULT-III and various set-
tings.
BCM control function list
System Refer to
Combination switch reading system BCS-7, "
System Diagram"
Signal buffer systemBCS-12, "System Diagram"
Power consumption control systemBCS-13, "System Diagram"
Auto light systemEXL-11, "System Diagram"
Turn signal and hazard warning lamp systemEXL-16, "System Diagram"
Headlamp systemEXL-7, "System Diagram"
Front fog lamp systemEXL-15, "System Diagram"
Daytime running light systemEXL-9, "System Diagram"
Interior room lamp control systemINL-6, "System Diagram"
Step lamp systemINL-6, "System Diagram"
Interior room lamp battery saver systemINL-13, "BATTERY SAVER : CONSULT-III Function"
Front wiper and washer systemWW-4, "System Diagram"
Rear wiper and washer systemWW-8, "System Diagram"
Warning chime systemWCS-4, "WARNING CHIME SYSTEM : System Diagram"
Door lock system DLK-10, "DOOR LOCK AND UNLOCK SWITCH : System Diagram"
(NATS) Nissan anti-theft systemSEC-13, "System Diagram"
Vehicle security systemSEC-17, "System Diagram"
Rear window defogger systemDEF-4, "System Diagram"
Intelligent Key systemSEC-9, "System Diagram"
Power window systemPWC-5, "SystemDiagram"
RAP (retained accessory power) systemBCS-26, "RETAINED PWR : CONSULT-III Function (BCM - RETAINED
PWR)"
TPMS (tire pressure monitoring system)
BCS-28, "AIR PRESSURE MONITOR : CONSULT-III Function"
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BCS-14
< FUNCTION DIAGNOSIS >[BCM]
POWER CONSUMPTION CONTROL SYSTEM
Sleep condition
Wake-up operation
• BCM transmits sleep wake up signal (wake up) to each unit when any condition listed below is established,
and then goes into normal mode from low power consumption mode.
• Each unit starts transmissions with CAN communication by receiving sleep wake up signals. Each unit trans- mits wake up signals to BCM with CAN communication to convey the start of CAN communication.
Wake-up condition
CAN sleep condition BCM sleep condition
• Receiving the sleep-ready signal (ready) from all units
• Ignition switch: OFF
• Vehicle security system alarm: No operation
• Warning lamp: No operation
• Warning chime: No operation
• Stop lamp switch: OFF
• Key switch status: No change for 2 seconds
• Hazard warning lamp: No operation
•Exterior lamp: OFF
• Door lock status: No change for 2 seconds
• CONSULT-III communication status: No communication
• Door switch status: No change for 2 seconds The controls only BCM are completed.
(Interior room lamp battery saver: Time out etc.)
BCM wake-up condition
• Ignition switch: OFF → ACC or ON
• Stop lamp switch: ON (Depress brake pedal)
• Any door switch: OFF → ON
• Lighting switch: OFF → 1ST or PASS
• Hazard switch: OFF → ON
• Back door opener switch OFF → ON
• Remote keyless entry receiver: Receiving
• Intelligent Key unit: Receiving
Revision: March 2010 2008 QX56