2008 INFINITI QX56 Factory Service Manual

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Page 753 of 4083

INFINITI QX56 2008 Factory Service Manual CO-18
< ON-VEHICLE REPAIR >
ENGINE COOLING FAN
ENGINE COOLING FAN
Removal and Installation (Crankshaft Driven Type)INFOID:0000000001538862
REMOVAL
1. Remove the air duct and resonator assembly. Refer

Page 754 of 4083

INFINITI QX56 2008 Factory Service Manual ENGINE COOLING FANCO-19
< ON-VEHICLE REPAIR >
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• Check for leaks of the engine coolant. Refer to
CO-10, "Inspection".
• Start and warm up the engine. Visually make s

Page 755 of 4083

INFINITI QX56 2008 Factory Service Manual CO-20
< ON-VEHICLE REPAIR >
WATER PUMP
WATER PUMP
Removal and InstallationINFOID:0000000001538864
CAUTION:
• When removing water pump, be careful not to get engine coolant on drive belt.
• Water p

Page 756 of 4083

INFINITI QX56 2008 Factory Service Manual WATER PUMPCO-21
< ON-VEHICLE REPAIR >
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• Check for leaks of engine coolant. Refer to
CO-10, "Inspection".
• Start and warm up engine. Visually c heck for leaks of th

Page 757 of 4083

INFINITI QX56 2008 Factory Service Manual CO-22
< ON-VEHICLE REPAIR >
THERMOSTAT AND WATER PIPING
THERMOSTAT AND WATER PIPING
Removal and InstallationINFOID:0000000001538865
REMOVAL
Removal of Thermostat
1. Drain engine coolant from the radia

Page 758 of 4083

INFINITI QX56 2008 Factory Service Manual THERMOSTAT AND WATER PIPINGCO-23
< ON-VEHICLE REPAIR >
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3. Remove the engine room cover using power tool.
4. Disconnect the heater hose (heater core side).
5. Remove the

Page 759 of 4083

INFINITI QX56 2008 Factory Service Manual CO-24
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and LimitINFOID:00000000015388

Page 760 of 4083

INFINITI QX56 2008 Factory Service Manual DEF-1
DRIVER CONTROLS
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SECTION DEF
A
B
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CONTENTS
DEFOGGER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Repair Work Fl

DEF-1
DRIVER CONTROLS
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SECTION DEF
A
B
DEF
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CONTENTS
DEFOGGER
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Repair Work Flow ................................................ ......3
FUNCTION DIAGNOSIS ...............................4
REAR WINDOW DEFOGGER SYSTEM ........ .....4
System Diagram .................................................. ......4
System Description ...................................................4
Component Parts Location ........................................5
Component Description .............................................5
DIAGNOSIS SYSTEM (BCM) .............................6
COMMON ITEM ..................................................... ......6
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .......................................................
6
REAR WINDOW DEFOGGER ............................... ......6
REAR WINDOW DEFOGGER : CONSULT-III
Function (BCM - REAR DEFOGGER) ......................
6
CAN COMMUNICATION .....................................7
System Description ............................................. ......7
COMPONENT DIAGNOSIS ..........................8
REAR WINDOW DEFOGGER SWITCH ........ .....8
Description .......................................................... ......8
Component Function Check ......................................8
Diagnosis Procedure .................................................8
REAR WINDOW DEFOGGER RELAY ...............9
Description .......................................................... ......9
Component Function Check ......................................9
Diagnosis Procedure .................................................9
REAR WINDOW DEFOGGER POWER SUP-
PLY AND GROUND CIRCUIT ............................
10
Description .......................................................... ....10
Component Function Check ....................................10
Diagnosis Procedure ...............................................10
Component Inspection ......................................... ....11
DOOR MIRROR DEFOGGER LH .....................12
Description ...............................................................12
Component Function Check ....................................12
Diagnosis Procedure ...............................................12
Component Inspection .............................................13
DOOR MIRROR DEFOGGER RH .....................14
Description ...............................................................14
Component Function Check ....................................14
Diagnosis Procedure ...............................................14
Component Inspection .............................................15
ECU DIAGNOSIS .........................................16
BCM (BODY CONTROL MODULE) .................16
Reference Value .................................................. ....16
Wiring Diagram ........................................................17
SYMPTOM DIAGNOSIS ..............................25
REAR WINDOW DEFOGGER AND DOOR
MIRROR DEFOGGER DO NOT OPERATE. ....
25
Diagnosis Procedure ........................................... ....25
REAR WINDOW DEFOGGER DOES NOT
OPERATE BUT BOTH OF DOOR MIRROR
DEFOGGER OPERATE. ...................................
26
Diagnosis Procedure ...............................................26
BOTH DOORS MIRROR DEFOGGER DON’T
OPERATE BUT REAR WINDOW DEFOG-
GER OPERATES ..............................................
27
Diagnosis Procedure ...............................................27
DRIVER SIDE DOOR MIRROR DEFOGGER
DOES NOT OPERATE. .....................................
28
Diagnosis Procedure ...............................................28
PASSENGER SIDE DOOR MIRROR DEFOG-
GER DOES NOT OPERATE. ............................
29
Revision: March 2010 2008 QX56

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