2009 INFINITI QX56 steering

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QUICK REFERENCE INDEX
AGENERAL INFORMATIONGIGeneral Information
BENGINEEMEngine Mechanical
LUEngine Lubrication System
COEngine Cooling System
ECEngine Control System
FLFuel System
EXExhaust System
STRStarting System
ACCAccelerator Control System
CHYBRIDHBCHybrid Control System
HBBHybrid Battery System
HBRHybrid Brake System
DTRANSMISSION & DRIVE-
LINETMTransaxle & Transmission
DLNDriveline
FAXFront Axle
RAXRear Axle
ESUSPENSIONFSUFront Suspension
RSURear Suspension
SCSSuspension Control System
WTRoad Wheels & Tires
FBRAKESBRBrake System
PBParking Brake System
BRCBrake Control System
GSTEERINGSTSteering System
STCSteering Control System
HRESTRAINTSSBSeat Belt
SBCSeat Belt Control System
SRSRS Airbag
SRCSRS Airbag Control System
IVENTILATION, HEATER &
AIR CONDITIONERVTLVentilation System
HAHeater & Air Conditioning System
HACHeater & Air Conditioning Control System
JBODY INTERIORINTInterior
IPInstrument Panel
SESeat
ADPAutomatic Drive Postioner
APAdjustable Pedal
KBODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITYDLKDoor & Lock
SECSecurity Control System
GWGlass & Window System
PWCPower Window Control System
RFRoof
EXTExterior
BRMBody Repair Manual
LDRIVER CONTROLSMIRMirrors
EXLExterior Lighting System
INLInterior Lighting System
WWWiper & Washer
DEFDefogger
HRNHorn
MELECTRICAL & POWER
CONTROLPWOPower Outlet
BCSBody Control System
LANLAN System
PCSPower Control System
CHGCharging System
PGPower Supply, Ground & Circuit Elements
NDRIVER INFORMATION &
MULTIMEDIAMWIMeter, Warning Lamp & Indicator
WCSWarning Chime System
SNSonar System
AVAudio, Visual & Navigation System
OCRUISE CONTROLCCSCruise Control System
PMAINTENANCEMAMaintenance
All rights reserved. No part
of this Service Manual may
be reproduced or stored in a
retrieval system, or transmit-
ted in any form, or by any
means, electronic, mechani-
cal, photo-copying, record-
ing or otherwise, without the
prior written permission of
Nissan North America, Inc.
Edition: June 2008
Revision: December 2009
Publication No. SM9
E-1J60U1

2009
QUICK REFERNCE CHART: QX56
Front Disc Brake
INFOID:0000000005987155
Unit: mm (in)
Rear Disc BrakeINFOID:0000000005987156
Unit: mm (in)
Fluids and LubricantsINFOID:0000000005987154
Brake model AD41VA
Brake pad Standard thickness (new) 12.0 (0.476)
Repair limit thickness 1.0 (0.039)
Disc rotor Standard thickness (new) 30 (1.181)
Repair limit thickness 28.5 (1.122)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.03 (0.001)
Brake model
AD14VE
Brake pad Standard thickness (new) 12.0 (0.472)
Repair limit thickness 1.0 (0.039)
Disc rotor Standard thickness (new) 14.0 (0.551)
Repair limit thickness 12.5 (0.492)
Maximum uneven wear (measured at 8 positions) 0.015 (0.0006)
Runout limit (with it attached to the vehicle) 0.05 (0.002)
Description
Capacity (Approximate)
Metric US measure Imp measure
Fuel 105.8 28 gal 23 1/4 gal
Engine oil
Drain and refill With oil filter change
6.5 6 7/8 qt 5 3/4 qt
Without oil filter change 6.2 6 1/2 qt 5 1/2 qt
Dry engine (engine overhaul) 7.6 8 qt 6 3/4 qt
Cooling system With reservoir
at MAX level
14.4
15 1/4 qt 12 5/8 qt
Automatic transmission fluid (ATF) 10.6 11 1/4 qt 9 3/8 qt
Rear differential gear oil 1.75 3 3/4 pt 3 1/8 pt
Transfer fluid 3.0 3 1/8 qt 2 5/8 qt
Front differential gear oil 1.6 3 3/8 pt 2 7/8 pt
Power steering fluid (PSF) 1.0 1 1/8 qt 7/8 qt
Brake fluid — — —
Brake grease — — —
Multi-purpose grease — — —
Windshield washer fluid 4.5 4 3/4 qt 4 qt
Air conditioning system refrigerant 1.08 ± 0.05 kg 2.38 ± 0.11 lb 2.38 ± 0.11 lb
Air conditioning system oil 290 m9.8 fl oz 10.2 fl oz

ACC-1
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SECTION ACC
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CONTENTS
ACCELERATOR CONTROL SYSTEM
PRECAUTION ....... ........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
REMOVAL AND INSTALLATION ................4
ACCELERATOR CONTROL SYSTEM ..............4
Removal and Installation ..................................... .....4
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ....
6
SERVICE DATA AND SPECIFICATIONS
(SDS) ..................................................................
6
Accelerator Control .............................................. .....6
Revision: December 20092009 QX56

ACC-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005851830
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:0000000005851831
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: December 20092009 QX56

PRECAUTIONSACC-3
< PRECAUTION >
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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: December 20092009 QX56

ADP-3
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RECLINING SENSOR .................................... ....76
Description .......................................................... ....76
Component Function Check ..................................76
Diagnosis Procedure ..............................................76
LIFTING SENSOR (FRONT) ..............................78
Description .......................................................... ....78
Component Function Check ..................................78
Diagnosis Procedure ..............................................78
LIFTING SENSOR (REAR) ................................80
Description .......................................................... ....80
Component Function Check ..................................80
Diagnosis Procedure ..............................................80
TILT SENSOR ....................................................82
Description .......................................................... ....82
Component Function Check ..................................82
Diagnosis Procedure ..............................................82
PEDAL ADJUSTING SENSOR ..........................84
Description .......................................................... ....84
Component Function Check ..................................84
Diagnosis Procedure ..............................................84
MIRROR SENSOR .............................................86
DRIVER SIDE ........................................................ ....86
DRIVER SIDE : Description ....................................86
DRIVER SIDE : Component Function Check ........86
DRIVER SIDE : Diagnosis Procedure ....................86
PASSENGER SIDE ...................................................88
PASSENGER SIDE : Description ....................... ....88
PASSENGER SIDE :
Component Function Check ..................................
88
PASSENGER SIDE : Diagnosis Procedure ...........88
SLIDING MOTOR ...............................................90
Description .......................................................... ....90
Component Function Check ..................................90
Diagnosis Procedure ..............................................90
RECLINING MOTOR ..........................................92
Description .......................................................... ....92
Component Function Check ..................................92
Diagnosis Procedure ..............................................92
LIFTING MOTOR (FRONT) ................................94
Description .......................................................... ....94
Component Function Check ..................................94
Diagnosis Procedure ..............................................94
LIFTING MOTOR (REAR) ..................................96
Description .......................................................... ....96
Component Function Check ..................................96
Diagnosis Procedure ..............................................96
TILT MOTOR ......................................................98
Description .......................................................... ....98
Component Function Check ..................................98
Diagnosis Procedure ..............................................98
PEDAL ADJUSTING MOTOR ........................100
Description ........................................................... ..100
Component Function Check ................................100
Diagnosis Procedure ............................................100
DOOR MIRROR MOTOR ................................102
Description .............................................................102
Component Function Check ..................................102
Diagnosis Procedure .............................................102
Component Inspection ...........................................104
SEAT MEMORY INDICATOR LAMP ..............105
Description .............................................................105
Component Function Check ................................105
Diagnosis Procedure ............................................105
Component Inspection ...........................................106
ECU DIAGNOSIS .......................................107
DRIVER SEAT CONTROL UNIT ....................107
Reference Value .................................................. ..107
Wiring Diagram ......................................................112
Fail Safe ................................................................126
DTC Index .............................................................127
AUTOMATIC DRIVE POSITIONER CON-
TROL UNIT ......................................................
128
Reference Value ....................................................128
Wiring Diagram ......................................................131
BCM (BODY CONTROL MODULE) ...............146
Reference Value ....................................................146
Terminal Layout .....................................................148
Physical Values .....................................................148
Wiring Diagram ......................................................154
SYMPTOM DIAGNOSIS ............................159
ADP SYSTEM SYMPTOMS ............................159
Symptom Table ................................................... ..159
NORMAL OPERATING CONDITION .............161
Description .............................................................161
PRECAUTION ............................................162
PRECAUTIONS ...............................................162
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
162
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
162
Precaution for Work ...............................................163
PREPARATION .........................................164
PREPARATION ...............................................164
Special Service Tool ............................................ ..164
Commercial Service Tool ......................................164
ON-VEHICLE REPAIR ...............................165
Revision: December 20092009 QX56

PRE-INSPECTION FOR DIAGNOSTICADP-9
< BASIC INSPECTION >
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PRE-INSPECTION FOR DIAGNOSTIC
Basic InspectionINFOID:0000000004055281
1. CHECK POWER SUPPLY AND DROUND CIRCUIT
Check the power supply and ground circuit as shown below.
 Driver seat control unit: Refer to ADP-47, "DRIVER SEAT CONTROL UNIT : Diagnosis Procedure"
.
 Automatic drive positioner control unit: Refer to ADP-47, "AUTOMATIC DRIVE POSITIONER CONTROL
UNIT : Diagnosis Procedure".
Is the inspection result normally?
YES >> GO TO 2
NO >> Repair or replace the malfunctioning part.
2. CHECK MANUAL FUNCTION
Check the manual function operati ons by operating the relevant switches as shown below.
 Seat (slide, reclining, lifting front, lifting rear)
 Pedal assembly (forward, backward)
 Steering wheel (upward, downward)
 Door mirror
Do all manual functions operate normally?
YES >> GO TO 3
NO (Seat, pedal, door mirror)>>Go to SYMPTOM 1, refer to ADP-159, "Symptom Table"
. And, GO TO 4 if
the result of SYMPTOM 1 is OK.
3. CHECK MEMORY FUNCTION 1
Register the seat positions (refer to Owner’s Manual) and check that all parts of the seat, pedals, steering
wheel and door mirrors move to their memory positions correctly.
Are the operations normal?
YES >> Check each malfunction according to the instruction of the SYMPTOM 4, refer to ADP-159,
"Symptom Table".
No (memory indicator operates normally)>> Go to SYMPTOM 2, refer to ADP-159, "Symptom Table"
.
No (memory indicator does not operate normally either)>> GO TO 5
4. CHECK MEMORY FUNCTION 2
Register the seat positions (refer to Owner’s Manual) and check that all parts of the seat, pedals, steering
wheel and door mirrors move to their memory positions correctly.
Are the operations normal?
YES >> Check intermittent incident. Refer to GI-38, "Intermittent Incident".
NO >> GO TO 7
5. CHECK SEAT MEMORY SW ITCH/MEMORY INDICATOR
Check the seat memory switch/memory switch indicator of the SYMPTOM 5, refer to ADP-159, "Symptom
Table".
Is the inspection result normal?
YES >> GO TO 6
NO >> Repair or replace the malfunctioning part.
6. CHECK OPERATION CONDITION
Check the memory operation conditions (refer to ADP-12, "AUTOMATIC DRIVE POSITIONER SYSTEM :
System Description").
Are all operation conditions fulfilled?
YES >> Go to SYMPTOM 6, refer to ADP-159, "Symptom Table".
NO >> Fulfill the operation conditions. Refer to ADP-12, "AUTOMATIC DRIVE POSITIONER SYSTEM :
System Description".
7. CHECK MECHANISM
Check for the following.
Revision: December 20092009 QX56

ADP-12
< FUNCTION DIAGNOSIS >
AUTOMATIC DRIVE POSITIONER SYSTEM
AUTOMATIC DRIVE POSITIONER SYST EM : Component Parts Location
INFOID:0000000003775495
AUTOMATIC DRIVE POSITIONER SYSTEM : System DescriptionINFOID:0000000003775496
OUTLINE
The system automatically moves the driver seat, pedal assembly, steering wheel and door mirror position by
the driver seat control unit and the automatic drive posit ioner control unit. The driver seat control unit corre-
sponds with the automatic drive positioner control unit by UART communication.
ALJIA0347ZZ
1. A. Automatic drive positioner control
unit M33, M34
B. Pedal adjustin g motor assembly
E109, E110 2. A. Steering column
B. Key switch and ignition knob
switch M12
C. BCM M18, M19, M20 (view with
instrument panel removed) 3. A. Door mirror remo
te control switch
D10
B. Seat memory switch D5
4. Pedal adjusting switch M96 5 . A. Door mirrror LH D4, RH D107
B. Front door switch LH B 6. A. A/T selector lever
B. A/T shift selector (park position
switch) M203
7. A. Sliding motor LH B204 (driver seat
view), reclining motor LH B205, lift-
ing motor (front) B2 06, lifting motor
(rear) B207
B. Driver seat control unit B202,
B203
C. Power seat switch LH B208 8. A. ADP steering switch M16
B. Tilt sensor M85 and tilt motor M86
Function Description
Manual function The driving position (seat, pedal assembly, steering wheel and door mirror position)
can be adjusted by using the power seat switch, pedal adjusting switch, ADP steering
switch or door mirror
remote control switch.
Memory function The seat, pedal assembly and outside mirror move to the stored driving position by
pressing seat memory switch (1 or 2).
Revision: December 20092009 QX56