INFINITI QX56 2011 Factory Service Manual

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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-
LINECLClutch
TMTransaxle & 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 Positioner
KBODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITYDLKDoor & Lock
SECSecurity Control System
GWGlass & Window System
PWCPower Window Control System
RFRoof
HDHood
EXTExterior
BRMBody Repair
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 CONTROL &
DRIVER ASSISTANCECCSCruise Control System
DASDriver Assistance System
DMSDrive Mode 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, recording or otherwise,
without the prior written per-
mission of NISSAN MOTOR
CO., LTD.
Edition: May 2010
Publication No. SM1E-1Z62U0

FOREWORD
This manual contains maintenance and repair procedure for the 2011
INFINITI QX56.
In order to assure your safety and the efficient functioning of the vehicle,
this manual should be read thoroughly. It is especially important that the
PRECAUTIONS in the GI section be completely understood before starting
any repair task.
All information in this manual is based on the latest product information
at the time of publication. The right is reserved to make changes in specifi-
cations and methods at any time without notice.
IMPORTANT SAFETY NOTICE
The proper performance of service is essential for both the safety of
the technician and the efficient functioning of the vehicle.
The service methods in this Service Manual are described in such a
manner that the service may be performed safely and accurately.
Service varies with the procedures used, the skills of the technician
and the tools and parts available. Accordingly, anyone using service
procedures, tools or parts which are not specifically recommended
by NISSAN must first be completely satisfied that neither personal
safety nor the vehicle’s safety will be jeopardized by the service
method selected.

QUICK REFERENCE CHART QX56
QUICK REFERENCE CHART QX56PFP:00000
ENGINE TUNE-UP DATA (VK56VD)ELS0003W
Engine modelVK56VD
Firing order 1-8-7-3-6-5-4-2
Idle speed
A/T (In “P or N” position) rpm
600 ± 50
Ignition timing
(BTDC at idle speed) 12
° ± 2 °
CO% at idle 0.7 - 9.9 % and engine runs smoothly
Tensions of drive belt Auto adjustment by auto tensioner
Radiater cap relief pressure kPa (kg/cm
2 , psi)
Standard 108.2 - 127.8 (1.1 - 1.3, 15.7 - 18.5)
Limit 98 (1.0, 14)
Cooling system leakage testing pressure kPa (kg/cm
2 , psi)186 (1.9, 27)
Compression pressure kPa (kg/cm
2 , psi)/rpm
Standard 1,667 (17, 242)/200
Minimum 1,226 (12.5, 178)/200
Differential limit between cylinders 98 (1.0, 14)/200
Spark plug
(Iridium-tipped type) Make NGK
Standard type DILKAR7B11
Gap (Standard) mm (in) 1.1 (0.043)
2011

QUICK REFERENCE CHART QX56
FRONT WHEEL ALIGNMENT
ELS0003X
*1: The minimum value and maximum value is the same as the nominal value.
Measure value under unladen*2 conditions.
*2: Fuel, engine coolant and lubricant are full. Spare tire, jack, hand tools and mats are in designated positions.
REAR WHEEL ALIGNMENTELS0003Y
Measure value under unladen* conditions.
*: Fuel, engine coolant and lubricant are full. Spare tire, jack, hand tools and mats are in designated positions. Item Standard
Measurement wheel Left side Right side
Camber
Degree minute (Decimal degree) Minimum
−0 °45 ′ ( −0.75 °) −0°55 ′ ( −0.91 °)
Nominal 0 ° 00 ′ (0.00 °) −0°10 ′ ( −0.17 °)
Maximum 0 ° 45 ′ (0.75 °)0 ° 35 ′ (0.58 °)
Left and right difference 0 ° 33 ′ (0.55 °) or less
Caster
Degree minute (Decimal degree) Minimum 2
° 20 ′ (2.34 °)2 ° 40 ′ (2.67 °)
Nominal 3 ° 05 ′ (3.08 °)3 ° 25 ′ (3.42 °)
Maximum 3 ° 50 ′ (3.83 °)4 ° 10 ′
(4.16 °)
Left and right difference 0 ° 45 ′ (0.75 °) or less
Kingpin inclination
Degree minute (Decimal degree) Minimum — —
Nominal
13° 20 ′ (13.33 °)
*113 ° 25 ′ (13.42 °)*1
Maximum — —
Toe-in Total toe-in
Distance
Minimum In 1.4 mm (0.055 in)
Nominal In 2.4 mm (0.094 in)
Maximum In 3.4 mm (0.134 in)
Toe angle (left wheel or right wheel)
Degree minute (Decimal degree) Minimum In 0
° 03 ′ (0.05 °)
Nominal In 0 ° 05 ′ (0.08 °)
Maximum In 0 ° 07 ′ (0.11 °)
Item Standard
Camber
Degree minute (Decimal degree) Minimum –1
° 00 ′ (–1.00 °)
Nominal –0 ° 30 ′ (–0.50 °)
Maximum 0 ° 00 ′ (0.00 °)
Left and right difference 0 ° 45 ′ (0.75 °) or less
To e - i n Total toe-in
Distance
Minimum 0 mm (0 in)
Nominal In 3.4 mm (0.134 in)
Maximum In 6.8 mm (0.268 in)
Toe angle (left wheel or right wheel)
Degree minute (Decimal degree) Minimum 0
° 00 ′ (0.00 °)
Nominal In 0 ° 07 ′ (0.12 °)
Maximum In 0 ° 14 ′ (0.23 °)
2011

QUICK REFERENCE CHART QX56
BRAKE PEDAL
Unit : mm (in)
FRONT DISK BRAKE
Unit : mm (in)
REAR DISK BRAKE
Unit : mm (in)
REFILL CAPACITIESELS00040
Item Standard
Brake pedal height 168.5 (6.63) – 178.5 (7.03)
Depressed brake pedal height
[Depressing 490 N (50 kg, 110 lb) while turning the engine ON] 100 (3.94) or more
Item Limit
Brake pad Wear thickness 1.5 (0.059)
Disc rotor Wear thickness 28.5 (1.122)
Thickness variation (measured at 8 positions) 0.015 (0.0006)
Runout (with it attached to the vehicle) 0.053 (0.0021)
Item Limit
Brake pad Wear thickness 2.0 (0.079)
Disc rotor Wear thickness 18.0 (0.709)
Thickness variation (measured at 8 positions) 0.015 (0.0006)
Runout (with it attached to the vehicle) 0.05 (0.0020)
UNIT
Liter US measure
Fuel tank 98.4 26 gal
Engine Coolant ( With reservoir tank ) at MAX level 14.9 15-6/8 qt
Engine oil Drain and refill
With oil filter change 6.5 6-7/8 qt
Without oil filter change 6.2 6-4/8 qt
Dry engine (Overhaul) 7.6 8 qt
Transmission 10.0 10-5/8 qt
Transfer 1.5 3-1/8 pt
Final drive Front 0.75 1-5/8 pt
Rear 1.75 3-3/4 pt
Power steering system 1.0 7/8 qt
Air conditioning system Compressor oil 0.21 7.1 fl oz
Refrigerant 1.05 kg 2.32 lb
2011

ACC-1
ENGINE
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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
REMOVAL AND INSTALLATION ................3
ACCELERATOR CONTROL SYSTEM .......... .....3
MODELS WITHOUT DISTANCE CONTROL AS-
SIST SYSTEM ....................................... ......................
3
MODELS WITHOUT DISTANCE CONTROL AS-
SIST SYSTEM : Exploded View ................................
3
MODELS WITHOUT DISTANCE CONTROL AS-
SIST SYSTEM : Removal an d Installation ...............
3
MODELS WITHOUT DISTANCE CONTROL AS-
SIST SYSTEM : Inspection ......................................
3
MODELS WITH DISTANCE CONTROL ASSIST
SYSTEM .......... ............................................................
4
MODELS WITH DISTANCE CONTROL ASSIST
SYSTEM : Exploded View ................................... .....
4
MODELS WITH DISTANCE CONTROL ASSIST
SYSTEM : Removal and Installation ........................
4
MODELS WITH DISTANCE CONTROL ASSIST
SYSTEM : Inspection ...............................................
4
Revision: 2010 May2011 QX56

ACC-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006289699
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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that 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 “SRS AIR BAG”.
 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric 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.
Revision: 2010 May2011 QX56

ACCELERATOR CONTROL SYSTEMACC-3
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
ACCELERATOR CONTROL SYSTEM
MODELS WITHOUT DISTANCE
CONTROL ASSIST SYSTEM
MODELS WITHOUT DISTANCE CONTRO L ASSIST SYSTEM : Exploded View
INFOID:0000000006289700
MODELS WITHOUT DISTANCE CONTROL ASS IST SYSTEM : Removal and Instal-
lation
INFOID:0000000006289701
REMOVAL
1. Remove the inside mounting nuts.
2. Remove accelerator pedal assembly.
3. Disconnect accelerator pedal position sensor harness connector. CAUTION:
 Never disassemble accelerator pedal assembly.
 Never remove accelerator pedal position sensor from accelerator pedal assembly.
 Avoid impact from dropping etc. during handling.
 Be careful to keep accelerator lever away from water.
INSTALLATION
Installation is the reverse order of removal.
MODELS WITHOUT DISTANCE CONT ROL ASSIST SYSTEM : Inspection
INFOID:0000000006289702
INSPECTION AFTER INSTALLATION
 Check accelerator pedal moves smoothly within the whole operation range when it is fully depressed and
released.
 Check accelerator pedal securely returns to the fully released position.
 For the electrical inspection of accelerator pedal position sensor, refer to EC-470, "
Component Inspection
(Accelerator Pedal Position Sensor)".
CAUTION:
1. Accelerator pedal assembly
: Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA3268GB
Revision: 2010 May2011 QX56

ACC-4
< REMOVAL AND INSTALLATION >
ACCELERATOR CONTROL SYSTEM
When harness connector of accelerator pedal position sensor is disconnected, perform “Accelerator
Pedal Released Position Learning”. Refer to EC-146, "
Description".
MODELS WITH DISTANCE CONTROL ASSIST SYSTEM
MODELS WITH DISTANCE CONTRO L ASSIST SYSTEM : Exploded View
INFOID:0000000006289703
MODELS WITH DISTANCE CONTROL ASSI ST SYSTEM : Removal and Installation
INFOID:0000000006289704
REMOVAL
1. Remove the inside mounting nuts.
2. Remove accelerator pedal assembly.
3. Disconnect accelerator pedal actuator harness connec tor and accelerator pedal position sensor harness
connector.
CAUTION:
 Never disassemble accelerator pedal assembly.
 Never remove accelerator pedal position sensor from accelerator pedal assembly.
 Avoid impact from dropping etc. during handling.
 Be careful to keep accelerator pedal assembly away from water.
INSTALLATION
Installation is the reverse order of removal.
MODELS WITH DISTANCE CONTRO L ASSIST SYSTEM : InspectionINFOID:0000000006289705
INSPECTION AFTER INSTALLATION
 Check accelerator pedal moves smoothly within the whole operation range when it is fully depressed and
released.
 Check accelerator pedal securely returns to the fully released position.
 For the electrical inspection of acce lerator pedal position sensor, Refer to EC-470, "
Component Inspection
(Accelerator Pedal Position Sensor)".
CAUTION:
When harness connector of accelerator pedal posi tion sensor is disconnected, perform “Accelerator
Pedal Released Position Learning”. Refer to EC-146, "
Description".
1. Accelerator pedal assembly
Vehicle front
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA3267GB
Revision: 2010 May2011 QX56

ADP-1
BODY INTERIOR
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SECTION ADP
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CONTENTS
AUTOMATIC DRIVE POSITIONER
PRECAUTION ................ ...............................5
PRECAUTIONS .............................................. .....5
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
5
SYSTEM DESCRIPTION ..............................6
COMPONENT PARTS ................................... .....6
Component Parts Location .................................. ......6
Component Description ............................................7
SYSTEM .............................................................11
AUTOMATIC DRIVE POSITIONER SYSTEM ....... ....11
AUTOMATIC DRIVE POSITIONER SYSTEM :
System Diagram ......................................................
11
AUTOMATIC DRIVE POSITIONER SYSTEM :
System Description .................................................
11
MANUAL FUNCTION ............................................ ....12
MANUAL FUNCTION : System Diagram ................13
MANUAL FUNCTION : System Description ............13
MEMORY FUNCTION ........................................... ....14
MEMORY FUNCTION : System Diagram ...............15
MEMORY FUNCTION : System Description ..........15
EXIT ASSIST FUNCTION ...................................... ....17
EXIT ASSIST FUNCTION : System Diagram .........17
EXIT ASSIST FUNCTION : Sy stem Description .....17
ENTRY ASSIST FUNCTION ................................. ....18
ENTRY ASSIST FUNCTION : System Diagram .....18
ENTRY ASSIST FUNCTION : System Description
....
18
INTELLIGENT KEY INTERLOCK FUNCTION ...... ....19
INTELLIGENT KEY INTERLOCK FUNCTION :
System Diagram ......................................................
20
INTELLIGENT KEY INTERLOCK FUNCTION :
System Description .................................................
20
Fail Safe .............................................................. ....21
DIAGNOSIS SYSTEM (DRIVER SEAT CON-
TROL UNIT) ......................................................
22
CONSULT-III Function ............................................22
ECU DIAGNOSIS INFORMATION ..............25
DRIVER SEAT CONTROL UNIT ......................25
Reference Value .................................................. ....25
Fail Safe ..................................................................30
DTC Index ...............................................................31
AUTOMATIC DRIVE POSITIONER CON-
TROL UNIT ........................................................
32
Reference Value ......................................................32
BCM (BODY CONTROL MODULE) .................35
List of ECU Reference .............................................35
WIRING DIAGRAM ......................................36
AUTOMATIC DRIVE POSITIONER SYSTEM ...36
Wiring Diagram .................................................... ....36
BASIC INSPECTION ...................................48
DIAGNOSIS AND REPAIR WORK FLOW .......48
Work Flow ............................................................ ....48
INSPECTION AND ADJUSTMENT ..................51
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL ............................... ....
51
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Description .....
51
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Special Re-
pair Requirement .....................................................
51
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ....
51
Revision: 2010 May2011 QX56