service INFINITI QX56 2008 Factory Service Manual

PRECAUTIONSST-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004884170
The Supplemental Restraint System such as “AIR 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 SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, 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 unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000004884171
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 disconnecti ng 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 power 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

PREPARATIONST-5
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000004920093
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
ST3127 S000
(See J-25765-A)
Preload gauge
1. GG9103000
(J-25765-A)
Torque wrench
2. HT62940000
( — )
Socket adapter
3. HT62900000
( — )
Socket adapter Inspecting of pinion rotating torque and rota-
tional torque for ball joint
HT72520000
(J-25730-A)
Ball joint remover Removing steering outer socket
1. KV48105300-4 and 5295262U10
( — )
Connector A and O-ring
2. KV48105300-3 and 5295262U00
( — )
Eye-bolt and O-ring
3. KV48103500
(J-26357 and J-26357-10)
Pressure gauge and shut-off valve
4. KV48105300-1 and 5295262U00
( — )
Connector B and O-ring
5. KV48105300-2
( — )
Nut Measuring oil pump relief pressure
ST27180001
(J-25726-A)
Steering wheel puller Removing steering wheel
S-NT541
NT146
SGIA0427E
ZZA0819D
Revision: March 2010
2008 QX56

ST-6
< PREPARATION >
PREPARATION
Commercial Service Tool
INFOID:0000000004920095
KV40107300
(—) Crimping boot bands
—
(J-44372)
Spring gauge Measuring steering wheel turning force
Tool number
(Kent-Moore No.)
Tool name
Description
ZZA1229D
LST024
Tool name
Description
Power tool Removing nuts and bolts
PBIC0190E
Revision: March 2010 2008 QX56

STEERING WHEELST-15
< ON-VEHICLE REPAIR >
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ON-VEHICLE REPAIR
STEERING WHEEL
On-Vehicle Inspection and ServiceINFOID:0000000004920096
CHECKING CONDITION OF INSTALLATION
• Check installation condition of steering gear assembly, front suspension, axle and steering column.
• Check if movement exists when steering wheel is mo ved up and down, to the left and right and to the axial
direction.
• Check if the nuts for steering gear assembly are loose. Refer to ST-23, "
Removal and Installation".
CHECKING STEERING WHEEL PLAY
1. Turn tires straight ahead, start engine, then turn steer ing wheel to the left and right lightly, and measure
steering wheel movement on the outer circumference when steering wheel is turned up to the point where
tires start moving.
CHECKING NEUTRAL POSITION ON STEERING WHEEL
• Check neutral position on steering wheel after confirming that front wheel alignment is correct. Refer to FSU-
7, "Front Wheel Alignment".
1. Turn tires straight ahead, check if steering wheel is in the neutral position.
2. If it is not in the neutral position, remo ve steering wheel and reinstall it correctly.
3. If the neutral position cannot be attained by repositi oning the steering wheel two teeth or less on steering
stem, loosen tie-rod lock nuts of steering outer socket s, then adjust tie-rods by the same amount in the
opposite direction.
CHECKING STEERING WHEEL TURNING FORCE
1. Park vehicle on a level, dry surface and set parking brake.
2. Start engine.
3. Bring power steering fluid up to operating temperature of 60 ° – 80 °C (140 ° – 176 °F).
4. Tires need to be inflated to specified pressure. Refer to WT-51, "
Tire".
5. Check steering wheel turning force using Tool when steering wheel has been turned 360 ° from the neutral position.
End play of the axial direction
for steering wheel : 0 mm (0 in)
LGIA0024E
Steering wheel play on the outer circumference : 0 − 35 mm (0 − 1.38 in)
Tool number — (J-44372)
Steering wheel turning force : 39 N (4 kg-f, 9 lb-f) or less
WGIA0035E
Revision: March 2010 2008 QX56

POWER STEERING OIL PUMPST-17
< ON-VEHICLE REPAIR >
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POWER STEERING OIL PUMP
On-Vehicle Inspection and ServiceINFOID:0000000004920097
CHECKING RELIEF OIL PRESSURE
CAUTION:
Before starting work, confirm belt tension is proper.
1. Connect Tool between oil pump discharge connector and high pressure hose and then bleed air from the hydraulic circuit.
2. Start engine. Allow engine to run until tank temperature reaches 50 ° – 80 °C (122° – 176°F).
CAUTION:
• Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed,
fluid pressure in power steering pump increases to maximum. This will raise fluid temperature
excessively.
• Be careful not to contact hose with belt when engine is started.
3. With engine at idle, close shut-off valve and read the relief oil pressure.
CAUTION:
Do not close shut-off valve of pressure gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly. • If relief oil pressure is outside the specification, repair or replace oil pump. Refer to ST-35, "
Disassembly
and Assembly" .
5. After inspection, disconnect oil pressure gauge and oil pressure gauge adapter from hydraulic circuit, con-
nect oil pump discharge connector and high pressure hose. Add fluid and bleed air from hydraulic circuit
thoroughly. Refer to ST-13, "
Air Bleeding Hydraulic System" .
Tool number:
Pressure gauge and shut-off valve KV48103500
(J26357 and J26357-10)
Oil pump side Connector A and O-
ring
KV48105300-4 and 5295262U10
(—)
Eye-bolt and O-ring KV48105300-3 and 5295262U00
(—)
High pressure
piping side Connector B and O-
ring
KV48105300-1 and 5295262U00
(—)
Nut KV48105300-2
( — )
SGIA0570E
Relief oil pressure
: 9.0 – 9.8 mPa (91.77 – 99.93 kg/cm2 , 1305.34 – 1421.37 psi)
Revision: March 2010 2008 QX56

ST-36
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Steering WheelINFOID:0000000001534685
Steering ColumnINFOID:0000000001534686
Inspection After AssemblyUnit: mm (in)
Inspection After Removal Unit: mm (in)
Inspection After Installation
End play of the axial direction for steering wheel 0 mm (0 in)
Steering wheel play on the outer circumference 0 − 35 mm (0 − 1.38 in)
Steering wheel turning force 39 N (4 kg-f, 9 lb-f) or less
Steering column length “L” 610 (24.02)
WGIA0080E
Steering column length “L2” 262 (10.31)
Steering column length “L1” 158 (6.22)
Range “A” 61.3 mm (2.41 in)
SGIA0475E
WGIA0083E
Revision: March 2010 2008 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)ST-37
< SERVICE DATA AND SPECIFICATIONS (SDS)
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Steering Outer Socket and Inner SocketINFOID:0000000001534687
Unit: mm (in)
Steering GearINFOID:0000000001534688
Tie-rod ball joint outer socket Swing torque
0.3 − 2.9 N·m (0.03 − 0.29 kg-m, 3 − 25 in-lb)
Measurement on spring balance
• Measuring point: cotter pin hole of stud 4.84
− 46.7 N (0.50 − 4.7 kg-f, 4 − 34 lb-f)
Rotating torque 0.3 − 2.9 N·m (0.03 − 0.29 kg-m, 3 − 25 in-lb)
Axial end play 0.5 mm (0.020 in) or less
Tie-rod ball joint inner socket Swing torque
1.0 − 7.8 N·m (0.11 − 0.79 kg-m, 9 − 69 in-lb)
Measurement on spring balance
• Measuring point: "L" mark see above, "L"=83.2 mm (3.276 in). 12.1
− 93.7 N (1.3 − 9.5 kg-f, 9 − 69 lb-f)
Axial end play 0.2 mm (0.008 in) or less
SGIA0547E
Maximum inner socket length “L” 115.2 (4.54)
SGIA0167E
Steering gear modelPR26AM
Rack neutral position, dimension “L ” (rack stroke) 85.5 mm (3.36 in)
STC0034D
Revision: March 2010 2008 QX56

ST-38
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Oil Pump
INFOID:0000000001534689
Steering FluidINFOID:0000000001534690
Rack sliding force At the neutral point:
Range within
± 11.5 mm
(± 0.453 in) from the neutral
position
(in power ON) Area average value 147
− 211 N (14.99 − 21.52 kg, 33.1 − 47.52 lb)
Allowable variation 98 N (10 kg, 22 lb) or less
Whole area (in power OFF) Peak value
294 N (30.0 kg, 66 lb) or less
Allowable variation 147 N (16 kg, 35 lb) or less
Steering gear model
PR26AM
Relief oil pressure
9.0 − 9.8 mPa (91.77 − 99.93 kg/cm2, 1305.34 − 1421.37 psi)
Fluid capacity
Approx. 1.0 (1-1/8 US qt, 7/8 Imp qt)
Revision: March 2010 2008 QX56

STR-1
ENGINE
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SECTION STR
A
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CONTENTS
STARTING 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 Power Generation Variable Voltage
Control System ..........................................................
3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
Commercial Service Tool ..........................................4
BASIC INSPECTION ....................................5
DIAGNOSIS AND REPAIR WORKFLOW ..... .....5
Work Flow ........................................................... ......5
FUNCTION DIAGNOSIS ...............................8
STARTING SYSTEM ...................................... .....8
System Diagram .................................................. ......8
System Description ...................................................8
Component Parts Location ........................................8
Component Description ............................................9
COMPONENT DIAGNOSIS .........................10
B TERMINAL CIRCUIT .....................................10
Description ........................................................... ....10
Diagnosis Procedure ...............................................10
S CONNECTOR CIRCUIT .................................11
Description ...............................................................11
Diagnosis Procedure ...............................................11
STARTING SYSTEM .........................................12
Wiring Diagram .................................................... ....12
SYMPTOM DIAGNOSIS ..............................16
STARTING SYSTEM .........................................16
Symptom Table ................................................... ....16
ON-VEHICLE REPAIR .................................17
STARTER MOTOR ...........................................17
Removal and Installation ..................................... ....17
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
18
STARTER MOTOR ...........................................18
Starter .................................................................. ....18
Revision: March 2010 2008 QX56

STR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004857581
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:0000000004857584
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