2009 INFINITI QX56 service

ADP-48
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect automatic drive positioner control unit.
3. Check voltage between automatic drive positioner control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace harness.
2. CHECK GROUND CIRCUIT
Check continuity between the automat ic drive positioner control unit
harness connector and ground.
Is the inspection result normal?
YES >> Automatic drive positioner control unit power supply and ground circuit are OK.
NO >> Repair or replace harness.
AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Special Repair Requirement
INFOID:0000000003775552
1. PERFORM ADDITIONAL SERVICE
Perform additional service when removing battery negative terminal.
>> Refer to Owner’s Manual.
Te r m i n a l s Voltage (V)(Approx.)
(+)
(–)
Automatic drive positioner
control unit connector Te r m i n a l
M34 34
Ground Battery voltage
39
PIIA4543E
Automatic drive positioner
control unit connector Te r m i n a l
GroundContinuity
M34 40
Ye s
48
PIIA4544E
Revision: December 20092009 QX56

ADP-162
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005848468
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 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 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 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 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 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:0000000005851835
NOTE:
 This Procedure is applied only to models with Intelli gent 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: December 20092009 QX56

ADP-164
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000003775662
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000003775663
Tool number
(Kent-Moore No.)
Tool name Description
—
(J-39570)
Chassis ear Locating the noise
—
(J-43980)
NISSAN Squeak and Rattle
Kit Repairing the cause of noise
SIIA0993E
SIIA0994E
(Kent-Moore No.)
Tool name
Description
(J-39565)
Engine ear Locating the noise
SIIA0995E
Revision: December 20092009 QX56

ADP-166
< ON-VEHICLE REPAIR >
AUTOMATIC DRIVE POSITIONER CONTROL UNIT
AUTOMATIC DRIVE POSITIONER CONTROL UNIT
Removal and InstallationINFOID:0000000004055980
CAUTION:
When removing and installing, use shop cloths to protect parts from damage.
REMOVAL
1. Disconnect the battery negative terminal.
2. Remove the instrument driver lower panel. Refer to IP-13, "Removal and Installation"
.
3. Remove the screw from the aut omatic drive positioner control
unit (1).
4. Remove automatic drive positioner control unit (1) from bracket
and disconnect electrical connectors.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Clamp the harness in position.
NOTE:
After installing the automatic drive positioner cont rol unit, perform additional service when disconnecting bat-
tery negative terminal. Refer to ADP-8, "Special Repair Requirement"
.
ALIIA0241ZZ
Revision: December 20092009 QX56

AP-1
BODY INTERIOR
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G H
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SECTION AP
A
B
AP
N
O P
CONTENTS
ADJUSTABLE PEDAL
SERVICE INFORMATION .. ..........................2ADJUSTABLE PEDAL SYSTEM .......................2
Adjustable Pedal .................................................. .....2
Revision: December 20092009 QX56

AP-2
< SERVICE INFORMATION >
ADJUSTABLE PEDAL SYSTEM
SERVICE INFORMATION
ADJUSTABLE PEDAL SYSTEM
Adjustable PedalINFOID:0000000003775665
For adjustable pedal information, refer to ADP-12, "AUTOMATIC DRIVE POSITIONER SYSTEM : System
Description".
Revision: December 20092009 QX56

AV
AV-3
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G H
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M B
A
O P
Description ..........................................................
....
80
Diagnosis Procedure ...............................................80
RGB AREA (YS) SIGNAL CIRCUIT ..................81
Description .......................................................... ....81
Diagnosis Procedure ...............................................81
HORIZONTAL SYNCHRONIZING (HP) SIG-
NAL CIRCUIT ................................................. ....
82
Description .......................................................... ....82
Diagnosis Procedure ...............................................82
VERTICAL SYNCHRONIZING (VP) SIGNAL
CIRCUIT ......................................................... ....
83
Description .......................................................... ....83
Diagnosis Procedure ...............................................83
FRONT DOOR SPEAKER .................................84
Description .......................................................... ....84
Diagnosis Procedure ...............................................84
FRONT TWEETER .............................................87
Description .......................................................... ....87
Diagnosis Procedure ...............................................87
CENTER SPEAKER ...........................................90
Description .......................................................... ....90
Diagnosis Procedure ...............................................90
REAR DOOR SPEAKER ....................................92
Description .......................................................... ....92
Diagnosis Procedure ...............................................92
REAR DOOR TWEETER ...................................95
Description .......................................................... ....95
Diagnosis Procedure ...............................................95
BACK DOOR SPEAKER ...................................98
Description .......................................................... ....98
Diagnosis Procedure ...............................................98
SUBWOOFER ..................................................101
Description .......................................................... ..101
Diagnosis Procedure .............................................101
AMP ON SIGNAL CIRCUIT .............................104
Description .......................................................... ..104
Diagnosis Procedure .............................................104
STEERING SWITCH ........................................105
Description .......................................................... ..105
Diagnosis Procedure .............................................105
MICROPHONE SIGNAL CIRCUIT ...................107
Description .......................................................... ..107
Diagnosis Procedure .............................................107
ECU DIAGNOSIS .......................................109
AV CONTROL UNIT ....................................... ..109
Reference Value ................................................. ..109
Wiring Diagram .....................................................115
DTC Index ........................................................... ..143
DISPLAY UNIT ................................................145
Reference Value ....................................................145
BOSE SPEAKER AMP ...................................148
Reference Value ....................................................148
REAR VIEW CAMERA CONTROL UNIT .......151
Reference Value ....................................................151
DVD PLAYER ..................................................153
Reference Value ....................................................153
SYMPTOM DIAGNOSIS ............................155
MULTI AV SYSTEM ........................................155
Symptom Table ................................................... ..155
NORMAL OPERATING CONDITION .............157
Description .............................................................157
PRECAUTION ............................................165
PRECAUTIONS ...............................................165
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
165
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
165
PREPARATION .........................................167
PREPARATION ...............................................167
Commercial Service Tools ................................... ..167
ON-VEHICLE REPAIR ...............................168
AV CONTROL UNIT ........................................168
Removal and Installation ..................................... ..168
DISPLAY UNIT ................................................170
Removal and Installation .......................................170
FRONT TWEETER ..........................................171
Removal and Installation .......................................171
CENTER SPEAKER ........................................172
Removal and Installation .......................................172
FRONT DOOR SPEAKER ..............................173
Removal and Installation .......................................173
REAR DOOR SPEAKER ................................174
Removal and Installation .......................................174
BACK DOOR SPEAKER ................................175
Removal and Installation .......................................175
SUBWOOFER .................................................176
Removal and Installation .......................................176
DVD PLAYER ..................................................177
Removal and Installation .......................................177
Revision: December 20092009 QX56

AV
PRECAUTIONSAV-165
< PRECAUTION > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005851882
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:0000000005851883
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: December 20092009 QX56