INFINITI QX56 2010 Factory Service Manual

POWER STEERING GEAR AND LINKAGEST-33
< DISASSEMBLY AND ASSEMBLY >
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4. Install the boot clamps to the boots, as shown. CAUTION:
Do not reuse the large-diameter boot clamps.
5. Crimp the large-diameter boot clamps, using Tool.
6. Install the cylinder tubes to the gear housing assembly.
7. Install the lock nuts and outer sockets to the inner sockets.
8. Thread the outer sockets onto the inner sockets to the specified length (L), then tighten the lock nut s to the specification. Refer to
ST-23, "
Removal and Installation". Reconfirm that the tie-rod
length (L) is within specification.
AST139
Tool number : KV40107300 ( — )
RAC1133D
Maximum inner socket
length (L) : 102.2 mm (4.02 in)
SGIA0167E
Revision: April 20092010 QX56

ST-34
< DISASSEMBLY AND ASSEMBLY >
POWER STEERING OIL PUMP
POWER STEERING OIL PUMP
Disassembly and AssemblyINFOID:0000000005147878
INSPECTION BEFORE DISASSEMBLY
Disassemble the power steering oil pump only if the following items are found.
• Deformed or damaged pulley, bracket, connector or suction pipe.
• Oil leakage from the suction pipe or connector.
DISASSEMBLY
NOTE:
Mount the power steering oil pump in a vise as needed.
1. Remove the connector bolt, connector and copper washers. CAUTION:
Do not reuse the copper washers.
2. Remove the suction pipe and O-ring. CAUTION:
Do not reuse the O-ring.
3. Remove the pulley nut and pulley.
4. Remove the bracket bolts and bracket.
INSPECTION AFTER DISASSEMBLY
Body Assembly Inspection
Check the power steering oil pump body assembly fo r damage. If any damage is found, replace with a new
power steering oil pump assembly.
ASSEMBLY
Assembly is in the reverse order of disassembly.
CAUTION:
• Do not reuse the copper gaskets
• Do not reuse the O-ring. Apply a coat of Ge nuine Nissan PSF or equivalent to the O-ring.
1. Bracket 2. Spring washer3. Pulley
4. Power steering pump 5. High pressure hose bracket 6. O-ring
7. Suction pipe Front
LGIA0038E
Revision: April 20092010 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)ST-35
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Steering WheelINFOID:0000000005147879
Steering ColumnINFOID:0000000005147880
Inspection After Assembly Unit: mm (in)
Inspection After Removal Unit: mm (in)
End play of the axial direction for steering wheel0 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” 567 (22.32)
WGIA0080E
Steering column length “L1”
Steering column length “L2” 165.1 (6.50)
258 (10.16)
SGIA0475E
Revision: April 20092010 QX56

ST-36
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Inspection After Installation
Steering Outer Socket and Inner SocketINFOID:0000000005147881
Unit: mm (in)
Range “A”18°
Tilt mechanism range (Manual tilt) 3° per notch at 5 steps
WGIA0083E
Tie-rod ball joint outer socket Swinging torque (F)
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 Swinging 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 (0.08 in) or less
SGIA0358E
Inner socket length “L” 102.2 (4.02)
SGIA0167E
Revision: April 20092010 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)ST-37
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Steering GearINFOID:0000000005147882
Oil PumpINFOID:0000000005147883
Steering FluidINFOID:0000000005147884
Steering gear model PR26AM
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-f, 33.1 − 47.52 lb-f)
Allowable variation 98 N (10 kg-f, 22 lb-f) or less
Whole area (in power OFF) Peak value
294 N (30.0 kg-f, 66 lb-f) or less
Allowable variation 147 N (16 kg-f, 35 lb-f) or less
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: April 20092010 QX56

STR-1
ENGINE
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SECTION STR
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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 .................................12
Description ...............................................................12
Diagnosis Procedure ...............................................12
STARTING SYSTEM .........................................14
Wiring Diagram .................................................... ....14
SYMPTOM DIAGNOSIS ..............................18
STARTING SYSTEM .........................................18
Symptom Table ................................................... ....18
ON-VEHICLE REPAIR .................................19
STARTER MOTOR ...........................................19
Removal and Installation ..................................... ....19
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
20
STARTER MOTOR ...........................................20
Starter .................................................................. ....20
Revision: April 20092010 QX56

STR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005315461
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:0000000005315460
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: April 20092010 QX56

PRECAUTIONSSTR-3
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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 Power Generation Variable Voltage Control SystemINFOID:0000000005149546
CAUTION:
For this model, the battery current sensor that is installed to the negative battery cable measures the
charging/discharging current of the battery and performs various engine controls. If an electrical com-
ponent is connected directly to the negative battery terminal, the current flowing through that compo-
nent will not be measured by the battery current sensor. This condition may cause a malfunction of
the engine control system and battery discharge m ay occur. Do not connect an electrical component
or ground wire directly to the battery terminal.
Revision: April 20092010 QX56

STR-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005149547
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000005149548
Tool number
(Kent Moore No.)
Tool name Description
—
(—) Model GR-8
Multitasking Battery Diagnostic Sta-
tion Tests Batteries, starting and charging system.
For operating instructions, refer to diagnostic
station instruction manual.
AWIIA1239ZZ
Tool name
Description
Power tool Loosening bolts and nuts
PBIC0190E
Revision: April 20092010 QX56

DIAGNOSIS AND REPAIR WORKFLOWSTR-5
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000005149549
OVERALL SEQUENCE
DETAILED FLOW
AWBIA0755GB
Revision: April 20092010 QX56