2008 INFINITI QX56 Factory Service Manual

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Page 1025 of 4083

INFINITI QX56 2008 Factory Service Manual DLK-232
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
FRONT DOOR LOCK
FRONT DOOR LOCK
Component StructureINFOID:0000000001542671
Removal and InstallationINFOID:0000000001542672
REMOVAL
1. Remove

Page 1026 of 4083

INFINITI QX56 2008 Factory Service Manual FRONT DOOR LOCKDLK-233
< ON-VEHICLE REPAIR > [WITH INTELLIGENT KEY SYSTEM]
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3. Remove the door side grommet, and the bolt (TORX T30) from the grommet hole.
4. While pu

Page 1027 of 4083

INFINITI QX56 2008 Factory Service Manual DLK-234
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
FRONT DOOR LOCK
8. Remove the TORX bolts (T30) (1), and separate the door lock
assembly (2) from the door.
9. While pulling the outside handl

Page 1028 of 4083

INFINITI QX56 2008 Factory Service Manual REAR DOOR LOCKDLK-235
< ON-VEHICLE REPAIR > [WITH INTELLIGENT KEY SYSTEM]
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REAR DOOR LOCK
Component StructureINFOID:0000000001539092
Removal and InstallationINFOID:000

Page 1029 of 4083

INFINITI QX56 2008 Factory Service Manual DLK-236
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR LOCK
BACK DOOR LOCK
Power Back Door OpenerINFOID:0000000001539094
Removal
1. Remove the LH luggage side upper. Refer to
INT-19, "R

Page 1030 of 4083

INFINITI QX56 2008 Factory Service Manual BACK DOOR LOCKDLK-237
< ON-VEHICLE REPAIR > [WITH INTELLIGENT KEY SYSTEM]
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Door Lock AssemblyINFOID:0000000001539095
Removal
1. Remove the lower back door trim panel.

Page 1031 of 4083

INFINITI QX56 2008 Factory Service Manual DLN-1
TRANSMISSION & DRIVELINE
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CONTENTS
DRIVELINE
ATX14B
BASIC INSPECTION ....... .............................
6
DIAGNOSIS AND REPAIR WORKFLOW ..... ....

DLN-1
TRANSMISSION & DRIVELINE
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SECTION DLN
A
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CONTENTS
DRIVELINE
ATX14B
BASIC INSPECTION ....... .............................
6
DIAGNOSIS AND REPAIR WORKFLOW ..... .....6
Work Flow ........................................................... ......6
Preliminary Check .....................................................7
FUNCTION DIAGNOSIS ..............................10
4WD SYSTEM ................................................ ....10
System Diagram .................................................. ....10
System Description .................................................11
Component Parts Location ......................................16
CAN Communication ...............................................17
DIAGNOSIS SYSTEM (TRANSFER CON-
TROL UNIT) ........................................................
18
CONSULT-III Function (ALL MODE AWD/4WD) ....18
COMPONENT DIAGNOSIS .........................22
P1811 POWER SUPPLY CIRCUIT FOR
TRANSFER CONTROL UNIT ........................ ....
22
Description .......................................................... ....22
DTC Logic ...............................................................22
Diagnosis Procedure ...............................................22
Component Inspection ............................................23
P1802 – P1804, P1809 TRANSFER CON-
TROL UNIT .........................................................
24
Description ..............................................................24
DTC Logic ...............................................................24
Diagnosis Procedure ...............................................24
P1807 VEHICLE SPEED SENSOR (A/T) ..........26
Description .......................................................... ....26
DTC Logic ...............................................................26
Diagnosis Procedure ...............................................26
P1808 VEHICLE SPEED SENSOR (ABS) .........27
Description .......................................................... ....27
DTC Logic ............................................................ ....27
Diagnosis Procedure ...............................................27
P1810 NEUTRAL-4LO SWITCH .......................28
Description ...............................................................28
DTC Logic ................................................................28
Diagnosis Procedure ...............................................28
Component Inspection .............................................30
P1813 4WD SHIFT SWITCH .............................31
Description ...............................................................31
DTC Logic ................................................................31
Diagnosis Procedure ...............................................31
Component Inspection .............................................33
P1814 WAIT DETECTION SWITCH .................35
Description ...............................................................35
DTC Logic ................................................................35
Diagnosis Procedure ...............................................35
Component Inspection .............................................37
P1816 PNP SWITCH .........................................38
Description ...............................................................38
DTC Logic ................................................................38
Diagnosis Procedure ...............................................38
P1817 ACTUATOR MOTOR .............................39
Description ...............................................................39
DTC Logic ................................................................39
Diagnosis Procedure ...............................................39
Component Inspection .............................................43
P1818 ACTUATOR POSITION SWITCH ..........45
Description ...............................................................45
DTC Logic ................................................................45
Diagnosis Procedure ...............................................45
Component Inspection .............................................47
P1819 TRANSFER CONTROL DEVICE ...........48
Description ...............................................................48
DTC Logic ................................................................48
Diagnosis Procedure ...........................................
....48
Revision: March 2010 2008 QX56

Page 1032 of 4083

INFINITI QX56 2008 Factory Service Manual DLN-2
P1820 ENGINE SPEED SIGNAL ......................52
Description ........................................................... ...52
DTC Logic ......................................................

DLN-2
P1820 ENGINE SPEED SIGNAL ......................52
Description ........................................................... ...52
DTC Logic ...............................................................52
Diagnosis Procedure ..............................................52
P1822 CLUTCH PRESSURE SOLENOID .........53
Description ..............................................................53
DTC Logic ...............................................................53
Diagnosis Procedure ..............................................53
Component Inspection ............................................55
P1823 2-4 SOLENOID .......................................57
Description ........................................................... ...57
DTC Logic ...............................................................57
Diagnosis Procedure ..............................................57
Component Inspection ............................................60
P1824 TRANSFER MOTOR ..............................61
Description ..............................................................61
DTC Logic ...............................................................61
Diagnosis Procedure ..............................................61
Component Inspection ............................................65
P1826 TRANSFER FLUID TEMPERATURE ....67
Description ........................................................... ...67
DTC Logic ...............................................................67
Diagnosis Procedure ..............................................67
Component Inspection ............................................68
P1827 CLUTCH PRESSURE SWITCH .............70
Description ........................................................... ...70
DTC Logic ...............................................................70
Diagnosis Procedure ..............................................70
Component Inspection ............................................71
P1828 LINE PRESSURE SWITCH ....................73
Description ........................................................... ...73
DTC Logic ...............................................................73
Diagnosis Procedure ..............................................73
Component Inspection ............................................75
P1829 THROTTLE POSITION SIGNAL (ECM)
...
76
Description ........................................................... ...76
DTC Logic ...............................................................76
Diagnosis Procedure ..............................................76
P1830 ABS OPERATION SIGNAL (ABS) ........77
Description ........................................................... ...77
DTC Logic ...............................................................77
Diagnosis Procedure ..............................................77
P1831 VDC OPERATION SIGNAL (ABS) ........78
Description ........................................................... ...78
DTC Logic ...............................................................78
Diagnosis Procedure ..............................................78
P1832 TCS OPERATION SIGNAL (ABS) .........79
Description ........................................................... ...79
DTC Logic ...............................................................79
Diagnosis Procedure ..............................................79
ECU DIAGNOSIS .......................................80
TRANSFER CONTROL UNIT ...........................80
Reference Value .................................................. ...80
Wiring Diagram .......................................................88
DTC Index ...............................................................95
SYMPTOM DIAGNOSIS ...........................100
4WD SYSTEM SYMPTOMS ........................... ..100
Symptom Table .................................................... .100
4WD SHIFT INDICATOR LAMP AND 4LO IN-
DICATOR LAMP DO NOT TURN ON ..............
101
Description ............................................................101
Diagnosis Procedure .............................................101
4WD WARNING LAMP DOES NOT TURN ON ..103
Description ........................................................... .103
Diagnosis Procedure .............................................103
4WD SHIFT INDICATOR LAMP OR 4LO INDI-
CATOR LAMP DO NOT CHANGE ...................
105
Description ........................................................... .105
Diagnosis Procedure .............................................105
ATP WARNING LAMP DOES NOT TURN ON ..107
Description ........................................................... .107
Diagnosis Procedure .............................................107
4WD SHIFT INDICATOR LAMP KEEPS
FLASHING ........................................................
109
Description ........................................................... .109
Diagnosis Procedure .............................................109
4WD WARNING LAMP FLASHES RAPIDLY ..110
Description ............................................................110
Diagnosis Procedure .............................................110
4WD WARNING LAMP FLASHES SLOWLY ..111
Description ............................................................111
Diagnosis Procedure .............................................111
HEAVY TIGHT-CORNER BRAKING SYMP-
TOM OCCURS ................................................ ..
112
Description ........................................................... .112
Diagnosis Procedure .............................................112
ATP SWITCH ....................................................114
Description ........................................................... .114
Diagnosis Procedure .............................................114
4WD SYSTEM DOES NOT OPERATE ............116
Description ........................................................... .116
Diagnosis Procedure .............................................116
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ...........................
117
NVH Troubleshooting Chart ..................................117
PRECAUTION ............... ............................118
Revision: March 2010 2008 QX56

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