INFINITI QX56 2008 Factory Service Manual

EM-118
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Unit: mm (in)
Connecting Rod Bearing Oil Clearance
Unit: mm (in)
UndersizeThicknessCrank pin journal diameter “Dp”
0.25 (0.0098) 1.627 - 1.635 (0.0641 - 0.0644) Grind so that bearing clearance is the specified value.
Items StandardLimit
Connecting rod bearing oil clearance 0.020 - 0.039 (0.0008 - 0.0015) 0.055 (0.0022)
Revision: March 2010 2008 QX56

EX-1
ENGINE
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SECTION EX
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CONTENTS
EXHAUST 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
Precaution for Liquid Gasket .....................................3
PREPARATION ............................................4
PREPARATION ..................................................4
Special Service Tool ............................................ .....4
Commercial Service Tool .........................................4
ON-VEHICLE MAINTENANCE .....................5
EXHAUST SYSTEM ...........................................5
Checking Exhaust System ................................... .....5
ON-VEHICLE REPAIR ..................................6
EXHAUST SYSTEM ...........................................6
Removal and Installation ..................................... .....6
Revision: March 2010 2008 QX56

EX-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004857579
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:0000000004857585
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: March 2010 2008 QX56

PRECAUTIONSEX-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.
Precaution for Liquid GasketINFOID:0000000001538868
REMOVAL OF LIQUID GASKET SEALING
• After removing the bolts and nuts, separate the mating surface and
remove the old liquid gasket sealing using Tool.
CAUTION:
Do not damage the mating surfaces.
• Tap the seal cutter to insert it (1).
• In areas where the Tool is difficult to use, lightly tap to slide it (2).
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application surface and the mating surface using suitable tool.
• Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering moisture, grease and foreign material.
3. Attach the liquid gasket tube to the Tool. Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-15, "
Recommended Chemical Products and Sealants".
4. Apply the liquid gasket without breaks to the specified location with the specified dimensions.
• If there is a groove for the liquid gasket application, apply theliquid gasket to the groove.
• As for the bolt holes, normally apply the liquid gasket inside
the holes. If specified in the procedure, it should also be
applied outside the holes.
• Within five minutes of liquid gasket application, install the mat-
ing component.
• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten after the installation.
• Wait 30 minutes or more after installation before refilling the engine with engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe them.
Tool number : KV10111100 (J-37228)
WBIA0566E
PBIC0003E
Tool number : WS39930000 ( — )
WBIA0567E
SEM159F
Revision: March 2010
2008 QX56

EX-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000001538869
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000001538870
Tool number
(Kent-Moore No.)
Tool name Description
KV10114400
(J-38365)
Heated oxygen sensor wrench Loosening or tightening heated oxygen sen-
sors:
a: 22 mm (0.87 in)
S-NT636
(Kent-Moore No.)
Tool name
Description
(J-43897-18)
(J-43897-12)
Oxygen sensor thread cleaner Reconditioning the exhaust system threads
before installing a new heated oxygen sensor
(Use with anti-seize lubricant shown below):
a: J-43897-18 (18 mm, 0.71 in) dia.
b: J-43897-12 (12 mm, 0.47 in) dia.
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907) Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads
Power tool Loosening nuts and bolts
AEM488
AEM489
PBIC0190E
Revision: March 2010 2008 QX56

EXHAUST SYSTEMEX-5
< ON-VEHICLE MAINTENANCE >
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ON-VEHICLE MAINTENANCE
EXHAUST SYSTEM
Checking Exhaust SystemINFOID:0000000001538871
Check exhaust pipes, muffler and mounting for improper
attachment, leaks, cracks, damage or deterioration.
• If anything is found, repair or replace damaged parts.
SMA211A
Revision: March 2010 2008 QX56

EX-6
< ON-VEHICLE REPAIR >
EXHAUST SYSTEM
ON-VEHICLE REPAIR
EXHAUST SYSTEM
Removal and InstallationINFOID:0000000001538872
Exhaust System
CAUTION:
• Be sure to use genuine exhaust system parts or equivalents which are specially designed for heatresistance, corrosion resistance, and shape.
• Perform the operation with the exh aust system fully cooled. The system will be hot just after the
engine stops.
• Be careful not to cut your hand on the heat insulator edge.
REMOVAL
Remove exhaust system components using power tool.
• Remove heated oxygen sensor as needed using Tool.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Always replace exhaust gaskets with new ones when reassembling.
• Before installing a new heated o xygen sensor, clean and lube the exhaust tube threads using Tool.
AWBIA0667GB
1. Tailpipe hanger bracket 2. Tailpipe3. Gasket
4. Main muffler 5. Right front exhaust tube6. Ring gasket
7. Heated oxygen sensor 2 (bank 2) 8. Heated oxygen sensor 2 (bank 1) 9. Left front exhaust tube
10. Center exhaust tube 11. Muffler hanger bracket front 12. Muffler hanger bracket rear
Front
Tool number : KV1011440 (J-38365)
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EXHAUST SYSTEMEX-7
< ON-VEHICLE REPAIR >
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O• Discard any heated oxygen sensor which has been dr
opped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a co ncrete floor; replace with a new one.
• Do not over-torque the heated oxygen sensor. Doing so may damage the heated oxygen sensor,
resulting in the MIL coming on.
• If any mounting insulator is badly deformed, repair or replace it. If deposits such as mud pile up on
the mounting insulators, clean and inspect them.
• Temporarily tighten the nuts on the exhaust manifold side and th e bolts on the vehicle side. Check
each part for interference with other components, an d then tighten the nuts and bolts to specifica-
tion.
INSPECTION AFTER INSTALLATION
• With the engine running, check exhaust tube joints for gas leakage and unusual noises.
• Check to ensure that mounting brackets and mount ing rubbers are installed properly and free from undue
stress. Improper installation could resu lt in excessive noise and vibration.
Tool number A: — (J-43897-18)
B: — (J-43897-12)
Revision: March 2010 2008 QX56

EXL-1
DRIVER CONTROLS
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SECTION EXL
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CONTENTS
EXTERIOR LIGHTING SYSTEM
BASIC INSPECTION ....... .............................4
DIAGNOSIS AND REPAIR WORKFLOW ..... .....4
Work Flow ........................................................... ......4
FUNCTION DIAGNOSIS ...............................7
HEADLAMP .................................................... .....7
System Diagram .................................................. ......7
System Description ...................................................7
Component Parts Location ........................................7
Component Description .............................................7
DAYTIME LIGHT SYSTEM .................................9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ........................................9
Component Description ...........................................10
AUTO LIGHT SYSTEM ......................................11
System Diagram ......................................................11
System Description .................................................11
Component Parts Location ......................................12
Component Description ...........................................12
HEADLAMP AIMING SYSTEM (MANUAL) .......14
System Diagram .................................................. ....14
System Description .................................................14
Component Description ...........................................14
FRONT FOG LAMP ............................................15
System Diagram .................................................. ....15
System Description .................................................15
Component Parts Location ......................................15
Component Description ...........................................15
TURN SIGNAL AND HAZARD WARNING
LAMPS ...............................................................
16
System Diagram .................................................. ....16
System Description .................................................16
Component Parts Location ......................................17
Component Description ...........................................17
PARKING, LICENSE PLATE AND TAIL
LAMPS ..............................................................
18
System Diagram .................................................. ....18
System Description ..................................................18
Component Parts Location ......................................18
Component Description ...........................................19
TRAILER TOW ..................................................20
System Diagram ......................................................20
System Description ..................................................20
Component Parts Location ......................................21
Component Description ...........................................21
DIAGNOSIS SYSTEM (BCM) ...........................23
COMMON ITEM ..................................................... ....23
COMMON ITEM : Diagnosis Description ................23
COMMON ITEM : CONSULT-III Function ...............23
EXTERNAL LAMP ................................................. ....23
EXTERNAL LAMP : CONSULT-III Function ............23
FLASHER ............................................................... ....25
FLASHER : CONSULT-III Function (BCM -
FLASHER) ...............................................................
25
DIAGNOSIS SYSTEM (IPDM E/R) ...................26
CONSULT - III Function (IPDM E/R) .......................26
COMPONENT DIAGNOSIS .........................27
POWER SUPPLY AND GROUND CIRCUIT ....27
BCM (BODY CONTROL MODULE) ...................... ....27
BCM (BODY CONTROL MODULE) : Diagnosis
Procedure ............................................................ ....
27
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) .......................... ....
27
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) : Diagnosis Pro-
cedure .................................................................. ....
27
Revision: March 2010 2008 QX56

EXL-2
HEADLAMP (HI) CIRCUIT ................................28
Description ........................................................... ...28
Component Function Check ...................................28
Diagnosis Procedure ..............................................28
HEADLAMP (LO) CIRCUIT ...............................30
Description ........................................................... ...30
Component Function Check ...................................30
Diagnosis Procedure ..............................................30
FRONT FOG LAMP CIRCUIT ...........................32
Description ........................................................... ...32
Component Function Check ...................................32
Diagnosis Procedure ..............................................32
PARKING LAMP CIRCUIT ................................34
Description ........................................................... ...34
Component Function Check ...................................34
Diagnosis Procedure ..............................................34
TURN SIGNAL LAMP CIRCUIT ........................37
Description ........................................................... ...37
Component Function Check ...................................37
Diagnosis Procedure ..............................................37
OPTICAL SENSOR ...........................................40
Description ..............................................................40
Component Function Check ...................................40
Diagnosis Procedure ..............................................40
HEADLAMP AIMING SWITCH ..........................42
Description ........................................................... ...42
Diagnosis Procedure ..............................................42
HEADLAMP .......................................................43
Wiring Diagram .................................................... ...43
DAYTIME LIGHT SYSTEM ................................47
Wiring Diagram .................................................... ...47
AUTO LIGHT SYSTEM ......................................54
Wiring Diagram .................................................... ...54
HEADLAMP AIMING SYSTEM (MANUAL) ......61
Wiring Diagram .................................................... ...61
FRONT FOG LAMP SYSTEM ...........................65
Wiring Diagram .................................................... ...65
TURN SIGNAL AND HAZARD WARNING
LAMP SYSTEM .............................................. ...
68
Wiring Diagram .................................................... ...68
PARKING, LICENSE PLATE AND TAIL
LAMPS SYSTEM ............................................ ...
75
Wiring Diagram .................................................... ...75
STOP LAMP ......................................................81
Wiring Diagram .................................................... ...81
BACK-UP LAMP ................................................85
Wiring Diagram .................................................... ...85
TRAILER TOW ..................................................90
Wiring Diagram .................................................... ...90
ECU DIAGNOSIS .......................................99
BCM (BODY CONTROL MODULE) ............... ...99
Description ........................................................... ...99
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
100
Description ........................................................... .100
SYMPTOM DIAGNOSIS ...........................101
EXTERIOR LIGHTING SYSTEM SYMPTOMS ..101
Symptom Table .................................................... .101
NORMAL OPERATING CONDITION ...............103
Description ........................................................... .103
BOTH SIDE HEADLAMPS DO NOT SWITCH
TO HIGH BEAM ................................................
104
Description ........................................................... .104
Diagnosis Procedure .............................................104
BOTH SIDE HEADLAMPS (LO) ARE NOT
TURNED ON .....................................................
105
Description ............................................................105
Diagnosis Procedure .............................................105
PARKING, LICENSE PLATE AND TAIL
LAMPS ARE NOT TURNED ON ......................
106
Description ........................................................... .106
Diagnosis Procedure .............................................106
BOTH SIDE FRONT FOG LAMPS ARE NOT
TURNED ON .....................................................
107
Description ............................................................107
Diagnosis Procedure .............................................107
PRECAUTION ...........................................108
PRECAUTIONS .............................................. ..108
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
108
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
108
ON-VEHICLE REPAIR ..............................110
ADJUSTMENT AND INSPECTION ................ ..110
HEADLAMP ............................................................ .110
HEADLAMP : Aiming Adjustment .........................110
FRONT FOG LAMP ................................................ .111
FRONT FOG LAMP : Aiming Adjustment .............111
REMOVAL AND INSTALLATION .............113
HEADLAMP .................................................... ..113
Revision: March 2010 2008 QX56