service repair manual

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QUICK REFERENCE INDEX
A GENERAL INFORMATION GI General Information
B ENGINE EM Engine Mechanical
LU Engine Lubrication System
CO Engine Cooling System
EC Engine Control System
FL Fuel System
EX Exhaust System
STR Starting System
ACC Accelerator Control System
C HYBRID HBC Hybrid Control System
HBB Hybrid Battery System
HBR Hybrid Brake System
D TRANSMISSION & DRIVE-
LINE
CL Clutch
TM Transaxle & Transmission
DLN Driveline
FAX Front Axle
RAX Rear Axle
E SUSPENSION FSU Front Suspension
RSU Rear Suspension
SCS Suspension Control System
WT Road Wheels & Tires
F BRAKES BR Brake System
PB Parking Brake System
BRC Brake Control System
G STEERING ST Steering System
STC Steering Control System
H RESTRAINTS SB Seat Belt
SBC Seat Belt Control System
SR SRS Airbag
SRC SRS Airbag Control System
I VENTILATION, HEATER &
AIR CONDITIONER
VTL Ventilation System
HA Heater & Air Conditioning System
HAC Heater & Air Conditioning Control System
J BODY INTERIOR INT Interior
IP Instrument Panel
SE Seat
ADP Automatic Drive Positioner
K BODY EXTERIOR,
DOORS, ROOF & VEHICLE
SECURITY
DLK Door & Lock
SEC Security Control System
GW Glass & Window System
PWC Power Window Control System
RF Roof
HD Hood
EXT Exterior
BRM Body Repair
L DRIVER CONTROLS MIR Mirrors
EXL Exterior Lighting System
INL Interior Lighting System
WW Wiper & Washer
DEF Defogger
HRN Horn
M ELECTRICAL & POWER
CONTROL
PWO Power Outlet
BCS Body Control System
LAN LAN System
PCS Power Control System
CHG Charging System
PG Power Supply, Ground & Circuit Elements
N DRIVER INFORMATION &
MULTIMEDIA
MWI Meter, Warning Lamp & Indicator
WCS Warning Chime System
SN Sonar System
AV Audio, Visual & Navigation System
O CRUISE CONTROL &
DRIVER ASSISTANCE
CCS Cruise Control System
DAS Driver Assistance System
DMS Drive Mode System
P MAINTENANCE MA Maintenance
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

2. 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.

3. QUICK REFERENCE CHART QX56
QUICK REFERENCE CHART QX56 PFP:00000
ENGINE TUNE-UP DATA (VK56VD) ELS0003W
Engine model VK56VD
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/cm2 , 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/cm2
, psi) 186 (1.9, 27)
Compression pressure kPa (kg/cm2
, 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

4. 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 ALIGNMENT ELS0003Y
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°)*1
13° 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
Toe-in
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

5. QUICK REFERENCE CHART QX56
BRAKE PEDAL
Unit : mm (in)
FRONT DISK BRAKE
Unit : mm (in)
REAR DISK BRAKE
Unit : mm (in)
REFILL CAPACITIES ELS00040
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

6. GI-1
GENERAL INFORMATION
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SECTION GI
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CONTENTS
GENERAL INFORMATION
HOW TO USE THIS MANUAL ..................
.... 3
HOW TO USE THIS MANUAL .......................
..... 3
Description ..........................................................
......3
Terms ..................................................................
......3
Units ....................................................................
......3
Contents ..............................................................
......3
Relation between Illustrations and Descriptions .
......4
Components ........................................................
......4
HOW TO FOLLOW TROUBLE DIAGNOSES..... 6
Description ..........................................................
......6
How to Follow Test Groups in Trouble Diagnosis......6
Key to Symbols Signifying Measurements or Pro-
cedures ...............................................................
......7
HOW TO READ WIRING DIAGRAMS ...........
..... 9
Connector Symbols .............................................
......9
Sample/Wiring Diagram -Example- .....................
....10
Connector Information .........................................
....12
ABBREVIATIONS ..........................................
....14
Abbreviation List ..................................................
....14
TIGHTENING TORQUE OF STANDARD
BOLTS ............................................................
....19
Description ..........................................................
....19
Tightening Torque Table (New Standard Includ-
ed) .......................................................................
....19
RECOMMENDED CHEMICAL PRODUCTS
AND SEALANTS ............................................
....22
Recommended Chemical Products and Sealants
....22
VEHICLE INFORMATION .........................
...23
IDENTIFICATION INFORMATION .................
....23
Model Variation ...................................................
....23
Information About Identification or Model Code ..
....23
Dimensions .........................................................
....25
Wheels & Tires ....................................................
....25
PRECAUTION ...........................................
...26
PRECAUTIONS .................................................26
Description ...........................................................
....26
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................
....26
Precautions For Xenon Headlamp Service .........
....26
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect ...............................
....27
Precaution for Procedure without Cowl Top Cover
....27
General Precautions ............................................
....27
Three Way Catalyst .............................................
....29
Multiport Fuel Injection System or Engine Control
System .................................................................
....29
Hoses ..................................................................
....29
Engine Oils ..........................................................
....30
Air Conditioning ...................................................
....31
Fuel ......................................................................
....31
LIFTING POINT .................................................32
Pantograph Jack ..................................................
....32
Garage Jack and Safety Stand ............................
....32
2-Pole Lift ............................................................
....33
TOW TRUCK TOWING .....................................34
Tow Truck Towing ...............................................
....34
Vehicle Recovery (Freeing a Stuck Vehicle) .......
....34
BASIC INSPECTION ................................
...36
SERVICE INFORMATION FOR ELECTRICAL
INCIDENT ..........................................................36
Work Flow ............................................................
....36
Control Units and Electrical Parts ........................
....36
How to Check Terminal .......................................
....37
Intermittent Incident .............................................
....40
Circuit Inspection .................................................
....43
CONSULT-III/GST CHECKING SYSTEM .........48
Description ...........................................................
....48
CONSULT-III Function and System Application*1
....48
Revision: 2010 May 2011 QX56

7. GI-2
CONSULT-III/GST Data Link Connector (DLC)
Circuit ..................................................................
... 50
Wiring Diagram - CONSULT-III/GST CHECKING
SYSTEM - ............................................................
... 51
INSPECTION AND ADJUSTMENT ................
... 65
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL ...............................
... 65
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Required
Procedure After Battery Disconnection ................
... 65
Revision: 2010 May 2011 QX56

8. HOW TO USE THIS MANUAL
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< HOW TO USE THIS MANUAL >
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HOW TO USE THIS MANUAL
HOW TO USE THIS MANUAL
Description INFOID:0000000006280835
This volume explains “Removal, Disassembly, Installation, Inspection and Adjustment” and “Trouble Diag-
noses”.
Terms INFOID:0000000006280836
• The captions WARNING and CAUTION warn you of steps that must be followed to prevent personal injury
and/or damage to some part of the vehicle.
WARNING indicates the possibility of personal injury if instructions are not followed.
CAUTION indicates the possibility of component damage if instructions are not followed.
BOLD TYPED STATEMENTS except WARNING and CAUTION give you helpful information.
Standard value: Tolerance at inspection and adjustment.
Limit value: The maximum or minimum limit value that should not be exceeded at inspection and adjust-
ment.
Units INFOID:0000000006280837
• The UNITS given in this manual are primarily expressed as the SI UNIT (International System of Unit), and
alternatively expressed in the metric system and in the yard/pound system.
Also with regard to tightening torque of bolts and nuts, there are descriptions both about range and about the
standard tightening torque.
“Example”
Range
Standard
Contents INFOID:0000000006280838
• A QUICK REFERENCE INDEX, a black tab (e.g. ) is provided on the first page. You can quickly find the
first page of each section by matching it to the section's black tab.
• THE CONTENTS are listed on the first page of each section.
• THE TITLE is indicated on the upper portion of each page and shows the part or system.
• THE PAGE NUMBER of each section consists of two or three letters which designate the particular section
and a number (e.g. “BR-5”).
• THE SMALL ILLUSTRATIONS show the important steps such as inspection, use of special tools, knacks of
work and hidden or tricky steps which are not shown in the previous large illustrations.
Assembly, inspection and adjustment procedures for the complicated units such as the automatic transaxle
or transmission, etc. are presented in a step-by-step format where necessary.
Outer Socket Lock Nut : 59 - 78 N·m (6.0 - 8.0 kg-m, 43 - 58 ft-lb)
Drive Shaft Installation Bolt : 44.3 N·m (4.5 kg-m, 33 ft-lb)
Revision: 2010 May 2011 QX56

9. GI-4
< HOW TO USE THIS MANUAL >
HOW TO USE THIS MANUAL
Relation between Illustrations and Descriptions INFOID:0000000006280839
The following sample explains the relationship between the part description in an illustration, the part name in
the text and the service procedures.
Components INFOID:0000000006280840
• THE LARGE ILLUSTRATIONS are exploded views (see the following) and contain tightening torques, lubri-
cation points, section number of the PARTS CATALOG (e.g. SEC. 440) and other information necessary to
perform repairs.
The illustrations should be used in reference to service matters only. When ordering parts, refer to the appro-
priate PARTS CATALOG.
Components shown in an illustration may be identified by a circled number. When this style of illustration is
used, the text description of the components will follow the illustration.
SAIA0519E
Revision: 2010 May 2011 QX56

10. HOW TO USE THIS MANUAL
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SYMBOLS
1. Union bolt 2. Copper washer 3. Brake hose
4. Cap 5. Bleed valve 6. Sliding pin bolt
7. Piston seal 8. Piston 9. Piston boot
10. Cylinder body 11. Sliding pin 12. Torque member mounting bolt
13. Washer 14. Sliding pin boot 15. Bushing
16. Torque member 17. Inner shim cover 18. Inner shim
19. Inner pad 20. Pad retainer 21. Pad wear sensor
22. Outer pad 23. Outer shim 24. Outer shim cover
1: PBC (Poly Butyl Cuprysil) grease
or silicone-based grease
2: Rubber grease : Brake fluid
Refer to GI section for additional symbol definitions.
SFIA2959E
SAIA0749E
Revision: 2010 May 2011 QX56

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click on it.

12. GI-6
< HOW TO USE THIS MANUAL >
HOW TO FOLLOW TROUBLE DIAGNOSES
HOW TO FOLLOW TROUBLE DIAGNOSES
Description INFOID:0000000006280841
NOTICE:
Trouble diagnoses indicate work procedures required to diagnose problems effectively. Observe the following
instructions before diagnosing.
• Before performing trouble diagnoses, read the “Work Flow” in each section.
• After repairs, re-check that the problem has been completely eliminated.
• Refer to Component Parts and Harness Connector Location for the Systems described in each section for
identification/location of components and harness connectors.
• When checking circuit continuity, ignition switch should be OFF.
• Refer to the Circuit Diagram for quick pinpoint check.
If you need to check circuit continuity between harness connectors in more detail, such as when a sub-har-
ness is used, refer to Wiring Diagram in each individual section and Harness Layout in PG section for identi-
fication of harness connectors.
• Before checking voltage at connectors, check battery voltage.
• After accomplishing the Diagnosis Procedures and Electrical Components Inspection, check that all harness
connectors are reconnected as they were.
How to Follow Test Groups in Trouble Diagnosis INFOID:0000000006280842
1. Test group number and test group title
• Test group number and test group title are shown in the upper portion of each test group.
2. Work and diagnosis procedure
• Start to diagnose a problem using procedures indicated in enclosed test groups.
3. Questions and results
• Questions and required results are indicated in test group.
4. Action
• Next action for each test group is indicated based on result of each question.
JPAIA0021GB
Revision: 2010 May 2011 QX56

13. HOW TO FOLLOW TROUBLE DIAGNOSES
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Key to Symbols Signifying Measurements or Procedures INFOID:0000000006280843
JPAIA0397GB
Revision: 2010 May 2011 QX56

14. GI-8
< HOW TO USE THIS MANUAL >
HOW TO FOLLOW TROUBLE DIAGNOSES
JPAIA0398GB
Revision: 2010 May 2011 QX56

15. HOW TO READ WIRING DIAGRAMS
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HOW TO READ WIRING DIAGRAMS
Connector Symbols INFOID:0000000006282193
Most of connector symbols in wiring diagrams are shown from the terminal side.
• Connector symbols shown from the terminal side are enclosed by
a single line and followed by the direction mark.
• Connector symbols shown from the harness side are enclosed by
a double line and followed by the direction mark.
• Certain systems and components, especially those related to
OBD, may use a new style slide-locking type harness connector.
For description and how to disconnect, refer to PG section,
“Description”, “HARNESS CONNECTOR”.
• Male and female terminals
Connector guides for male terminals are shown in black and
female terminals in white in wiring diagrams.
SAIA0257E
SGI363
Revision: 2010 May 2011 QX56