2009 INFINITI QX56 service

POWER STEERING OIL PUMPST-17
< ON-VEHICLE REPAIR >
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POWER STEERING OIL PUMP
On-Vehicle Inspection and ServiceINFOID:0000000004187603
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 pressu re gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly.  If relief oil pressure is outside the specific ation, 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 : Refer to
ST-38, "Oil Pump"
Revision: December 20092009 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:0000000004187586
Steering ColumnINFOID:0000000004187587
Inspection After AssemblyUnit: mm (in)
Inspection After Removal Unit: mm (in)
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 3 9 N (4 kg-f, 9 lb-f) or less
Steering column length “L” 640 (25.20)
WGIA0080E
Steering column length “L1”
Steering column length “L2” 165.1 (6.50)
258 (10.16)
SGIA0475E
Revision: December 20092009 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
ST-37
< SERVICE DATA AND SPECIFICATIONS (SDS)
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Inspection After Installation
Steering Outer Socket and Inner SocketINFOID:0000000004187588
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: December 20092009 QX56

ST-38
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Steering Gear
INFOID:0000000004187589
Oil PumpINFOID:0000000004187590
Steering FluidINFOID:0000000004187591
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 (1 6 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: December 20092009 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 .................................11
Description ...............................................................11
Diagnosis Procedure ...............................................11
STARTING SYSTEM .........................................12
Wiring Diagram .................................................... ....12
SYMPTOM DIAGNOSIS ..............................17
STARTING SYSTEM .........................................17
Symptom Table ................................................... ....17
ON-VEHICLE REPAIR .................................18
STARTER MOTOR ...........................................18
Removal and Installation ..................................... ....18
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... ...
19
STARTER MOTOR ...........................................19
Starter .................................................................. ....19
Revision: December 20092009 QX56

STR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005856238
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:0000000005856245
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

STR-4
< PREPARATION >
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000003771785
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000003771786
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: December 20092009 QX56

STARTER MOTORSTR-19
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
STARTER MOTOR
StarterINFOID:0000000003771799
Application
All models
Manufacturer Mitsubishi
Model number M002T85571ZCKD
Ty p e Reduction gear type
System voltage 12V
No-load Terminal voltage
11V
Current Less than 145A
Revolution More than 3,300 rpm
Minimum diameter of commutator 31.4 mm (1.236 in)
Minimum length of brush 11.0 mm (0.433 in)
Brush spring tension 26.7-36.1 N (2.72 - 3.68 kg, 5.93 - 8.02 lb)
Clearance between pinion front edge and
pinion stopper 0.5 - 2.0 mm (0.020 - 0.079 in)
Revision: December 20092009 QX56