engine INFINITI QX56 2009 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-
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
QUICK REFERNCE CHART: QX56
Engine Tune-up DataINFOID:0000000005987162
GENERAL SPECIFICATIONS
DRIVE BELTS
SPARK PLUG
Cylinder arrangementV- 8
Displacement cm
3(in3) 5,552 (338.80)
Bore and stroke mm (in) 98 x 92 (3.86 x 3.62)
Valve arrangement DOHC
Firing order 1-8-7-3-6-5-4-2
Number of piston rings Compression 2
Oil 1
Number of main bearings 5
Compression ratio 9.8:1
Compression pressure
kPa (kg/cm
2, psi)/rpm Standard 1,520 (15.5, 220)/200
Minimum 1,324 (13.5, 192)/200
Differential limit between cylinders 98 (1.0, 14)/200
Cylinder number
Valve timing Unit: degree
abcde f
244 ° 232° -8° 60° 10° 54°
SEM957C
PBIC0187E
Tension of drive belts Auto adjustment by auto tensioner

QUICK REFERNCE CHART: QX56
2010
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information
Front Wheel Alignment (Unladen*1)INFOID:0000000005987161
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
*2: Target value 37° 31 ′ (37.52 °)
*3: Target value 33 ° 59 ′ (33.98 °)
*4: Target value 37 ° 44 ′ (37.73 °)
*5: Target value 33 ° 29 ′ (33.48 °)
*6 Some vehicles may not be equipped with straight (non-adjustable) lower link bolts and washers. In order to adjust camber and caster
on these vehicles, first replace the lower link bolts and washers with adjustable (cam) bolts and washers Make
NGK
Model Standard model
Standard type* DILFR5A-11
Gap (Nominal) 1.1 (0.043)
Drive type2WD 4WD
Camber*6
Degree minute (decimal degree) Minimum -0
° 51 ′ (-0.85 °)-0 ° 33 ′ (-0.55 °)
Nominal -0 ° 6 ′ (-0.10 °)0 ° 12 ′ (0.20 °)
Maximum 0 ° 39 ′ (0.65 °)0 ° 57 ′ (0.95 °)
Cross camber 0 ° 45 ′ (0.75 °) or less 0 ° 45 ′ (0.75 °) or less
Caster
Degree minute (decimal degree) Minimum 3
° 15 ′ (3.25 °)2 ° 45 ′ (2.75 °)
Nominal 4 ° 0 ′ (4.00 °)3 ° 30 ′ (3.50 °)
Maximum 4 ° 45 ′ (4.75 °)4 ° 15 ′ (4.25 °)
Cross caster 0 ° 45 ′
(0.75 °) or less 0 ° 45 ′ (0.75 °) or less
Kingpin inclination
Degree minute (decimal degree) 13
° 32 ′ (13.53 °)13 ° 13 ′ (13.22 °)
Total toe-in Distance (A
− B) Minimum 1.8 mm (0.07 in) 1.8 mm (0.07 in)
Nominal 2.8 mm (0.11 in) 2.8 mm (0.11 in)
Maximum 3.8 mm (0.15 in) 3.8 mm (0.15 in)
Angle (left side or right side)
Degree minute (decimal degree) Minimum 0
° 3 ′ (0.05 °)0 ° 3 ′ (0.05 °)
Nominal 0 ° 5 ′ (0.08 °)0 ° 5 ′ (0.08 °)
Maximum 0 ° 7 ′ (0.12 °)0 ° 7 ′ (0.12 °)
Wheel turning angle
(full turn) Inside
Degree minute (decimal degree)
34
° 31 ′ – 38 ° 31 ′ *2
(34.52 ° – 38.52 °) 34
° 44 ′ – 38 ° 44 ′ *4
(34.73 ° – 38.73
° )
Outside
Degree minute (decimal degree) 30
° 59 ′ – 34 ° 59 ′ *3
(30.98 ° – 34.98 °) 30
° 29 ′ – 34 ° 29 ′ *5
(30.48 ° – 34.48 °)
SFA234AC

2009
QUICK REFERNCE CHART: QX56
Rear Wheel Alignment (Unladen
*1)INFOID:0000000005987159
*1: Fuel tank, engine coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
Wheelarch Height (Unladen*1)INFOID:0000000005987160
Unit: mm (in)
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions. Applied model
Without air leveling With air leveling
Camber
Degree minute (decimal degree) Minimum - 0
° 25 ′ (- 0.4 °)- 1 ° 0 ′ (- 1 °)
Nominal 0 ° 5 ′ (0.1 °)- 0 ° 30 ′ (- 0.5 °)
Maximum 0 ° 35 ′ (0.6 °)0 ° 0 ′ (0 °)
Cross camber 0 ° 45' (0.75 °) or less
To e - i n Distance
Toe-in (left side or right side)
AL - BL or AR - BR
mm (in)
:Front Minimum - 2.4 mm (- 0.094 in) 0 mm (0 in)
Nominal 0.9 mm (0.035 in) 3.3 mm (0.130 in)
Maximum 4.2 mm (0.165 in) 6.6 mm (0.260 in)
Cross toe
(AL - BL) - (AR - BR)
mm (in) 2 mm (0.079 in) or less
Angle Toe angle (left side or right side)
Degree minute
(Decimal degree) Minimum - 0
° 5' (- 0.08 °)0 ° 0' (0 °)
Nominal 0 ° 2' (0.03 °)0 ° 7' (0.11 °)
Maximum 0 ° 9' (0.14 °)0 ° 14' (0.22 °)
Cross toe
Degree minute (Decimal degree) 0
° 8' (0.14 °) or less
ALEIA0059ZZ
Suspension type
Air leveling*2
Applied model 2WD 4WD
Front wheelarch height (Hf)920
(36.22) 937
(36.89)
Rear wheelarch height (Hr) 917
(36.10) 937
(36.89)
LEIA0085E

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
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
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

ACCELERATOR CONTROL SYSTEMACC-5
< REMOVAL AND INSTALLATION >
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4. Disconnect the adjustable pedal electric motor electrical connec-
tor.
5. Disconnect the adjustable pedal electric motor memory electri- cal connector.
6. Disconnect the accelerator position sensor electrical connector.
7. Remove the two upper and one lower accelerator pedal nuts.
8. Remove the adjustable accelerator pedal assembly. CAUTION:
• Do not disassemble the accelerator pedal assembly.
• Do not remove the accelerator pedal position sensor fromthe accelerator pedal bracket.
• Do not disassemble the accelerator pedal adjusting mechanism.
• Avoid damage from dropping the acceler ator pedal assembly during handling.
• Keep the accelerator pedal assembly away from water.
INSTALLATION
Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Check that the accelerator pedal move s smoothly within the specified ranges.
• Depress and release the accelerator pedal to check that it returns smoothly to the original released position.
• Perform an electrical inspection of the accelerator pedal position sensor. Refer to EC-188, "
Component
Inspection".
CAUTION:
When the harness connector of the accelerator pedal position sensor is disco\
nnected, perform
“Accelerator Pedal Released Position Learning”. Refer to EC-63, "
CONSULT-III Function (ENGINE)".
LBIA0380E
Adjustable accelerator pedal – total pedal applied stroke : 48.3 mm (1.90 in)
Adjustable accelerator pedal – total pedal adjustment travel : 73.2 mm (2.88 in)
Revision: December 20092009 QX56

ADP-146
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004064157
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
AIR COND SW A/C switch OFF OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed OFF
Back door opened ON
CDL LOCK SW Door lock/unlock switch does not operate OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed OFF
Rear door RH opened ON
ENGINE RUN Engine stopped OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed OFF
When hazard switch is pressed ON
LIGHT SW 1ST Lighting switch OFF OFF
Lighting switch 1st ON
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)ADP-147
< ECU DIAGNOSIS >
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HEADLAMP SW1 Headlamp switch OFF OFF
Headlamp switch 1st ON
HEADLAMP SW2 Headlamp switch OFF OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF OFF
High beam switch HI ON
H/L WASH SW NOTE:
The item is indicated, but not monitored OFF
IGN ON SW Ignition switch OFF or ACC OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed OFF
UNLOCK button of Intelligent Key is pressed ON
KEY ON SW Mechanical key is removed from key cylinder OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW  Ignition switch OFF or ACC
 Engine running
OFF
Ignition switch ON ON
PASSING SW Other than lighting switch PASS OFF
Lighting switch PASS ON
REAR DEF SW Rear window defogger switch OFF OFF
Rear window defogger switch ON ON
RKE LOCK AND UN-
LOCK NOTE:
The item is indicated, but not monitored OFF
ON
RR WASHER SW Rear washer switch OFF OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position OFF
Other than rear wiper stop position ON
TAIL LAMP SW Lighting switch OFF OFF
Lighting switch 1ST ON
TRNK OPNR SW When back door opener switch is not pressed OFF
When back door opener switch is pressed ON
TURN SIGNAL L Turn signal switch OFF OFF
Turn signal switch LH ON
TURN SIGNAL R Turn signal switch OFF OFF
Turn signal switch RH ON
VEHICLE SPEED While driving Equiv alent to speedometer reading
Monitor Item Condition Value/Status
Revision: December 20092009 QX56