INFINITI QX56 2011 Factory Service Manual

ST-4
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Service Notice or Precautions for Steering SystemINFOID:0000000006225573
 In case of removing steering gear assembly, make the final tightening with grounded and unloaded vehicle condition, and then check wheel alignment.
 Observe the following precautions when disassembling.
- Before disassembly, thoroughly clean the outside of the unit.
- Disassembly should be done in a clean work area. It is im portant to prevent the internal parts from becoming
contaminated by dirt or other foreign matter.
- For easier and proper assembly, place disassembled parts in order on a parts rack.
- Use nylon cloth or paper towels to clean the parts; co mmon shop rags can leave lint that might interfere with
their operation.
- Never reuse non-reusable parts.
- Before assembling, apply the specified grease to the directed parts.
Revision: 2010 May2011 QX56

PREPARATIONST-5
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000006225574
The actual shapes of Kent-Moore t ools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
ST27180001
(J-25726-A)
Steering wheel puller Removing steering wheel
ST3127S000
(J-25765-A)
Preload gauge Inspecting sliding torque, steering torque, and
rotating torque for ball joint
KV48103400
(—)
Preload adapter Inspecting rotating torque
KV40107300
(—)
Boot band crimping tool Installing boot band
KV48103500
(J-26357)
Oil pressure gauge Measuring oil pump relief pressure
KV48102500
(J-33914)
Oil pressure gauge adapter Measuring oil pump relief pressure
ZZA0819D
ZZA0806D
ZZA0824D
ZZA1229D
S-NT547
S-NT542
Revision: 2010 May2011 QX56

ST-6
< PREPARATION >
PREPARATION
Commercial Service Tools
INFOID:0000000006225575
Tool name Description
Power tool Loosening bolts and nuts
Ball joint remover Remove steering outer socket
Drift
a: 35 mm (1.38 in) dia.
b: 21 mm (0.83 in) dia. Installing oil pump oil seal
PBIC0190E
S-NT146
S-NT474
Revision: 2010 May2011 QX56

COMPONENT PARTSST-7
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Locatio n (Heated Steering Wheel)INFOID:0000000006225576
Component Description (Heated Steering Wheel)INFOID:0000000006225577
Heated Steering WheelINFOID:0000000006225578
The heated steering wheel is activated by the pow er supply from the heated steering wheel relay.
1. Heated steering wheel relay 2. Heated steering wheel switch 3. Heated steering wheel
A. Engine room right side
JSGIA0824ZZ
Part name Reference/Function
Heated steering wheel Heating element Refer to ST-7, "
Heated Steering Wheel".
Thermostat
Heated steering wheel relay Refer to ST-8, "
Heated Steering Wheel Relay".
Heated steering wheel switch Timer Refer to ST-8, "
Heated Steering Wheel Switch".
Revision: 2010 May2011 QX56

ST-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
Furthermore, the heated steering wheel incorporates a heating element and a thermostat to control heated
steering wheel temperatures.
 Heating element: Heat is generated by the passage of an electric current.
 Thermostat: ON/OFF operation of power supply at a certain temperature.
Heated Steering Wheel SwitchINFOID:0000000006225579
 Controls the heated steering wheel relay and operates the heated steering wheel system.
The heated steering wheel switch incorporates a ti mer and turns OFF the heated steering wheel relay when
operating time reaches a certain time.
- Timer: ON/OFF operation of the heated st eering wheel relay at a certain time.
 Turns the indicator lamp ON when the system is activated.
Heated Steering Wheel RelayINFOID:0000000006225580
Operates the heated steering system with the control signal from the heated steering wheel switch.
Revision: 2010 May2011 QX56

SYSTEMST-9
< SYSTEM DESCRIPTION >
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SYSTEM
System Description (Heated Steering Wheel)INFOID:0000000006225581
The heated steering wheel switch controls the heated steering wheel relay. When the heated steering wheel
switch is turned on, the heated steering wheel relay is energized and the heated steering wheel system will
operate. The heated steering wheel system will turn of f when the heated steering wheel temperature reaches
approximately 30 °C (86 °F). Heated steering wheel system operati on can also be canceled by pressing the
heated steering wheel switch again. In addition, the heat ed steering wheel switch incorporates a timer and
turns OFF the heated steering wheel relay to exit the heated steering wheel system when the operating time
reaches a certain time.
NOTE:
If the surface temperature of the steering wheel is below 20 °C (68 °F), the system will heat the steering wheel
and cycle off and on to maintain a temperature above 20 °C (68 °F). The indicator light will remain on as long as
the system is on. Push the switch again to turn t he heated steering wheel system off manually. The indicator
light will go off.
SYSTEM DIAGRAM
JSGIA0826GB
Revision: 2010 May2011 QX56

ST-10
< WIRING DIAGRAM >
HEATED STEERING WHEEL
WIRING DIAGRAM
HEATED STEERING WHEEL
Wiring DiagramINFOID:0000000006225582
JCGWM0373GB
Revision: 2010 May2011 QX56

HEATED STEERING WHEELST-11
< WIRING DIAGRAM >
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JCGWM0390GB
Revision: 2010 May2011 QX56

ST-12
< WIRING DIAGRAM >
HEATED STEERING WHEEL
JCGWM0391GB
Revision: 2010 May2011 QX56

DIAGNOSIS AND REPAIR WORK FLOWST-13
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
WorkFlow (Heated Steering Wheel)INFOID:0000000006225583
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred) as much as possible when the customer brings the vehicle in.
>> GO TO 2.
2.REPRODUCE THE MALFUNCTION INFORMATION
Check the malfunction on the vehicl e that the customer describes.
Inspect the relation of the symptoms and the condition when the symptoms occur.
>> GO TO 3.
3.IDENTIFY THE MALFUNCTIONING SYST EM WITH “SYMPTOM DIAGNOSIS”
Use “Symptom diagnosis” from the symptom inspection re sult in step 2 and then identify where to start per-
forming the diagnosis based on possible causes and symptoms.
>> GO TO 4.
4.IDENTIFY THE MALFUNCTIONING PART S WITH “COMPONENT DIAGNOSIS”
Perform the diagnosis with “Component di agnosis” of the applicable system.
>> GO TO 5.
5.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 6.
6.FINAL CHECK
Check that malfunctions are not reproduced when obtai ning the malfunction information from the customer,
referring to the symptom inspection result in step 2.
Are the malfunctions corrected?
YES >> INSPECTION END
NO >> GO TO 2.
Revision: 2010 May2011 QX56