2011 INFINITI QX56 diagram

REAR WINDOW DEFOGGER SYSTEMDEF-23
< WIRING DIAGRAM >
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JCLWM5507GB
Revision: 2010 May2011 QX56

DLK-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
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CONTENTS
DOOR & LOCK
PRECAUTION ................ ...............................8
PRECAUTIONS .............................................. .....8
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
8
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
8
Precautions For Xenon Headlamp Service ...............9
Work ..........................................................................9
PREPARATION ...........................................10
PREPARATION .............................................. ....10
Commercial Service Tools .................................. ....10
SYSTEM DESCRIPTION .............................11
COMPONENT PARTS ................................... ....11
DOOR LOCK SYSTEM .............................................11
DOOR LOCK SYSTEM :
Component Parts Location ................................ ....
11
DOOR LOCK SYSTEM : Component Description ....12
AUTOMATIC BACK DOOR SYSTEM .......................13
AUTOMATIC BACK DOOR SYSTEM :
Component Parts Location ................................ ....
14
AUTOMATIC BACK DOOR SYSTEM :
Component Description ..........................................
15
SYSTEM (POWER DOOR LOCK SYSTEM) .....16
System Diagram .................................................. ....16
System Description .................................................16
SYSTEM (INTELLIGENT KEY SYSTEM) ..........18
INTELLIGENT KEY SYSTEM ...................................18
INTELLIGENT KEY SYSTEM : System Diagram ....18
INTELLIGENT KEY SYSTEM : System Descrip-
tion ..........................................................................
18
DOOR LOCK FUNCTION ...................................... ....19
DOOR LOCK FUNCTION : System Diagram ..........19
DOOR LOCK FUNCTION : System Description .....19
BACK DOOR OPEN FUNCTION ........................... ....21
BACK DOOR OPEN FUNCTION : System Dia-
gram ........................................................................
21
BACK DOOR OPEN FUNCTION : System De-
scription ...................................................................
21
REMOTE KEYLESS ENTRY FUNCTION ..................23
REMOTE KEYLESS ENTRY FUNCTION : Sys-
tem Diagram ........................................................ ....
23
REMOTE KEYLESS ENTRY FUNCTION : Sys-
tem Description ........................................................
23
KEY REMINDER FUNCTION ................................ ....25
KEY REMINDER FUNCTION : System Diagram ....25
KEY REMINDER FUNCTION : System Descrip-
tion ...........................................................................
26
WELCOME LIGHT FUNCTION ............................. ....26
WELCOME LIGHT FUNCTION : System Diagram
....
26
WELCOME LIGHT FUNCTION : System Descrip-
tion ...........................................................................
26
WARNING FUNCTION .......................................... ....27
WARNING FUNCTION : System Description ..........27
SYSTEM (AUTOMATIC BACK DOOR SYS-
TEM) ..................................................................
31
System Diagram .................................................. ....31
System Description ..................................................31
SYSTEM (INTEGRATED HOMELINK
TRANSMITTER) ................................................
37
System Description .............................................. ....37
DIAGNOSIS SYSTEM (BCM) ...........................38
COMMON ITEM ..................................................... ....38
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
38
Revision: 2010 May2011 QX56

DLK-2
DOOR LOCK .............................................................39
DOOR LOCK : CONSULT-III Function (BCM -
DOOR LOCK) .........................................................
39
INTELLIGENT KEY ................................................ ...40
INTELLIGENT KEY : CONSULT-III Function
(BCM - INTELLIGENT KEY) ...................................
41
TRUNK ................................................................... ...44
TRUNK : CONSULT-III Function (BCM - TRUNK) ...44
DIAGNOSIS SYSTEM (AUTOMATIC BACK
DOOR CONTROL UNIT) ...................................
45
CONSULT-III Function (AUTOMATIC BACK
DOOR CONTROL UNIT) ..................................... ...
45
ECU DIAGNOSIS INFORMATION ..............46
BCM ................................................................ ...46
List of ECU Reference ......................................... ...46
AUTOMATIC BACK DOOR CONTROL MOD-
ULE ....................................................................
47
Reference Value .................................................. ...47
Fail Safe .................................................................49
DTC Inspection Priority Chart ..............................49
DTC Index ..............................................................50
WIRING DIAGRAM .....................................51
DOOR & LOCK SYSTEM ............................... ...51
Wiring Diagram - DOOR & LOCK SYSTEM - ...... ...51
AUTOMATIC BACK DOOR SYSTEM ...............66
Wiring Diagram - AUTOMATIC BACK DOOR
SYSTEM - ............................................ ...................
66
INTEGRATED HOMELINK TRANSMITTER
SYSTEM ............ .............................................. ...
75
Wiring Diagram - INTEGRATED HOMELINK
TRANSMITTER SYSTEM - ....................................
75
BASIC INSPECTION ...... .............................77
DIAGNOSIS AND REPAIR WORK FLOW ..... ...77
Work Flow ............................................................ ...77
INSPECTION AND ADJUSTMENT ...................80
ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL ............................... ...
80
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Description ....
80
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Work Proce-
dure ........................................................................
80
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (BCM) ......................................... ...
80
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (BCM) : Description ....................
80
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT (BCM) : Work Procedure .......... ...
80
ADDITIONAL SERVICE WHEN REPLACING (AU-
TOMATIC BACK DOOR CONTROL MODULE) .......
80
ADDITIONAL SERVICE WHEN REPLACING
(AUTOMATIC BACK DOOR CONTROL MOD-
ULE) : Description ................................................ ...
80
ADDITIONAL SERVICE WHEN REPLACING
(AUTOMATIC BACK DOOR CONTROL MOD-
ULE) : Work Procedure ........................................ ...
80
DTC/CIRCUIT DIAGNOSIS ........................82
U1000 CAN COMM CIRCUIT ......................... ...82
Description ........................................................... ...82
DTC Logic ...............................................................82
Diagnosis Procedure ...............................................82
U1010 CONTROL UNIT (CAN) .........................83
DTC Logic ............................................................ ...83
Diagnosis Procedure ...............................................83
B2401 IGNITION POWER SUPPLY CIRCUIT ...84
DTC Logic ............................................................ ...84
Diagnosis Procedure ...............................................84
B2403 ENCODER ..............................................85
DTC Logic ............................................................ ...85
Diagnosis Procedure ...............................................85
B2409 HALF LATCH SWITCH ..........................86
DTC Logic ............................................................ ...86
Diagnosis Procedure ...............................................86
Component Inspection ............................................87
B2416 TOUCH SENSOR RH ............................88
DTC Logic ............................................................ ...88
Diagnosis Procedure ...............................................88
Component Inspection ............................................89
B2417 TOUCH SENSOR LH .............................90
DTC Logic ............................................................ ...90
Diagnosis Procedure ...............................................90
Component Inspection ............................................91
B2419 OPEN SWITCH ......................................92
DTC Logic ............................................................ ...92
Diagnosis Procedure ...............................................92
Component Inspection ............................................93
B2420 CLOSE SWITCH ....................................95
DTC Logic ............................................................ ...95
Diagnosis Procedure ...............................................95
Component Inspection ............................................96
B2421 CLUTCH OPERATION TIME .................97
DTC Logic ............................................................ ...97
Diagnosis Procedure ...............................................97
B2422 BACK DOOR STATE .............................98
DTC Logic ............................................................ ...98
Revision: 2010 May2011 QX56

DLK-16
< SYSTEM DESCRIPTION >
SYSTEM (POWER DOOR LOCK SYSTEM)
SYSTEM (POWER DOOR LOCK SYSTEM)
System DiagramINFOID:0000000006225837
System DescriptionINFOID:0000000006225838
DOOR LOCK FUNCTION
Door Lock and Unlock Switch
 The door lock and unlock switch (driver side) is build into power window main switch.
 The door lock and unlock switch (passenger side) is build into front power window switch (passenger side).
 Interlocked with the locking operation of door lock and unlock switch, door lock actuators of all doors and
fuel lid lock actuator are locked.
 Interlocked with the unlocking operation of door lock and unlock switch, door lock actuators of all doors actu-
ator and fuel lid lock actuator are unlocked.
Door Key Cylinder Switch
 With the mechanical key inserted in the door key cylinder on driver side, turning it to lock position, locks door
lock actuator of all doors and fuel lid lock actuator.
 With the mechanical key inserted in the door key cylinder on driver side, turning it to unlock position once
unlocks the driver side door, turning it to unlock posit ion again within 60 seconds after the first unlock opera-
tion unlocks all of the other doors actuator and fuel lid lock actuator. (SELECTIVE UNLOCK OPERATION)
Selective unlock operation mode can be changed using CONSULT-III.
Refer to DLK-39, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
DOOR KEY CYLINDER SWITCH POWER WINDOW FUNCTION
Driver side door key cylinder LOCK/UNLOCK oper ation can activate power window. Refer to PWC-8, "System
Description".
IGNITION POSITION WARNING FUNCTION
When door lock and unlock switch are operated while dr iver side door is open and ignition position is ACC or
ON, door locks once but immediately unlocks.
INTERIOR ROOM LAMP CONTROL FUNCTION
Interior room lamp is controlled according to door lock/unlock state, refer to INL-6, "INTERIOR ROOM LAMP
CONTROL SYSTEM : System Description".
AUTOMATIC DOOR LOCK/UNLOCK FUNCTION (LOCK OPERATION)
The interlock door lock function is the function that locks all doors linked with the vehicle speed or shift posi-
tion. It has 2 types as per the following items.
Vehicle Speed Sensing Auto Door Lock
All doors are locked when the vehicle speed reaches 24 km/h (15 MPH) or more.
BCM outputs the lock signal to all door lock actuators when it detects that the ignition switch is turned ON, all
doors are closed and the vehicle speed received from the combination meter via CAN communication
becomes 24 km/h (15 MPH) or more.
JMKIA5278GB
Revision: 2010 May2011 QX56

DLK-18
< SYSTEM DESCRIPTION >
SYSTEM (INTELLIGENT KEY SYSTEM)
SYSTEM (INTELLIGENT KEY SYSTEM)
INTELLIGENT KEY SYSTEM
INTELLIGENT KEY SYSTEM : System DiagramINFOID:0000000006225839
INTELLIGENT KEY SYSTEM : System DescriptionINFOID:0000000006225840
 The Intelligent Key system is a syste m that makes it possible to lock and unlock the door locks (door lock/
unlock function) by carrying the Intelligent Key, which operates based on the results of electronic ID verifica-
tion using two-way communication between the Intelligent Key and the vehicle (BCM).
CAUTION:
The driver should always carry the Intelligent Key
 The settings for each function can be changed with CONSULT-III.
 If an Intelligent Key is lost, a new Intelligent Key can be registered. A maximum of 4 Intelligent Keys can be
registered.
 It is possible to perform a diagnosis on the system and register an Intelligent Key with CONSULT-III.
JMKIA5434GB
Function Description Refer
Door lock Lock/unlock can be performed by pressing the request switch DLK-19
Back door openerThe back door can be opened by carrying the Intelligent Key and pressing the
back door opener switch DLK-21
Remote keyless entry
Lock/unlock can be performed by pressing the remote controller button of the In-
telligent Key DLK-23
Revision: 2010 May2011 QX56

SYSTEM (INTELLIGENT KEY SYSTEM)
DLK-19
< SYSTEM DESCRIPTION >
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DOOR LOCK FUNCTION
DOOR LOCK FUNCTION : System DiagramINFOID:0000000006225841
DOOR LOCK FUNCTION : System DescriptionINFOID:0000000006225842
Only when pressing the door request switch, it is possi ble to lock and unlock the door by carrying the Intelli-
gent Key.
OPERATION DESCRIPTION
 When the BCM detects that each door request switch is pressed, it activates the outside key antenna and
inside key antenna corresponding to the pressed door reques t switch and transmits the request signal to the
Intelligent Key. And then, check that the Intelligent Key is near the door.
 If the Intelligent Key is within the outside key ant enna detection area, it receives the request signal and
transmits the key ID signal to the BCM via remote keyless entry receiver.
 BCM receives the key ID signal and compares it with the registered key ID.
 BCM locks/unlocks each doors (except back door).
 BCM sounds Intelligent Key warning buzzer (lock: 2 ti mes, unlock: 1 time) and blinks hazard warning lamps
(lock: 2 times, unlock: 1 time) at the same time as a reminder.
Key reminder The key reminder buzzer sounds a warning if the door is locked with the key left
inside the vehicle DLK-26
Welcome lightWhen the Intelligent Key is carried, and vehicle doors are approached, the BCM
illuminates interior room lamps and operates heart beat operation of the push-
button ignition switch DLK-26
Warning
If an action that does not meet the operating condition of the Intelligent Key sys-
tem is taken, the buzzer sounds to inform the driver DLK-27
Engine start The engine can be turned on while carrying the Intelligent Key
SEC-12
Interior room lamp control Interior room lamp is controlled according to door lock/unlock state INL-6
Power window Power window can be operated by Intelligent Key button operationPWC-8
Automatic drive positioner Automatic drive positioner system can be operated by door unlock operationADP-11
Panic alarm When Intelligent Key panic alarm button is pressed, horn soundsSEC-18
Function Description Refer
JMKIA5068GB
Revision: 2010 May2011 QX56

SYSTEM (INTELLIGENT KEY SYSTEM)
DLK-21
< SYSTEM DESCRIPTION >
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 Door is open (only lock operation)
How To Change Hazard And Buzzer Reminder Mode
Hazard and buzzer reminder mode can be changed using CONSULT-III.
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III F unction (BCM - INTELLIGENT KEY)".
AUTO DOOR LOCK FUNCTION
After door is unlocked by door request switch operation and if 60 seconds or more passes without performing
the following operation, all doors and fuel filler lid are automatically locked. However, operation check function
does not activate.
How To Change Auto Door Lock Operation Mode
Auto door lock operation mode can be changed using CONSULT-III.
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III F unction (BCM - INTELLIGENT KEY)".
LIST OF OPERATION RELATED PARTS
Parts marked with × are the parts related to operation.
BACK DOOR OPEN FUNCTION
BACK DOOR OPEN FUNCTION : System DiagramINFOID:0000000006225843
BACK DOOR OPEN FUNCTION : System DescriptionINFOID:0000000006225844
This section describes the operat ion of the back door opener switch.
Operating condition  Door switch is ON (door is open)
 Door is locked
 Push switch is pressed
Function
Intelligent Key
Remote keyless entry receiver
Door switch
Door request switch
Door lock actuator
Fuel lid lock actuator Inside key antenna
Outside key antenna
CAN communication system
BCM
Hazard warning lamp
Intelligent Key warning buzzer Push-button ignition switch
Door lock/unlock function ×××××××× ×
Hazard reminder function ××××
Selective unlock function × ××××× ×
Auto door lock function ×××××
JMKIA5082GB
Revision: 2010 May2011 QX56

SYSTEM (INTELLIGENT KEY SYSTEM)
DLK-23
< SYSTEM DESCRIPTION >
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REMOTE KEYLESS ENTRY FUNCTION
REMOTE KEYLESS ENTRY F UNCTION : System DiagramINFOID:0000000006225845
REMOTE KEYLESS ENTRY FUNCT ION : System DescriptionINFOID:0000000006225846
The Intelligent Key has the same functions as the remote control entry system. Therefore, it can be used in the
same manner as the remote controller by operating the door lock/unlock button.
OPERATION
Remote keyless entry system controls operation of the following items.
 Door lock/unlock function
 Selective unlock function
 Auto door lock function
 Hazard and horn reminder function
 Automatic back door open/close function
OPERATION AREA
To check that the Intelligent Key works normally, use within 1 m (3 ft) range of each doors, however the opera-
ble range may differ according to surroundings.
DOOR LOCK/UNLOCK FUNCTION
 When door lock/unlock button of the Intelligent Key is pr essed, lock signal or unlock signal transmitted from
Intelligent Key to BCM via remote keyless entry receiver.
 When BCM receives the door lock/unlock signal, it operates all door lock actuators and fuel lid lock actuator,
blinks the hazard lamp (lock: 2 time, unlock: 1 times) and horn chirp signal to IPDM E/R at the same time as
a reminder.
 IPDM E/R honks horn (lock: 1 time) as a reminder.
Function
Intelligent Key
Remote keyless entry receiver Back door opener switch
Back door lock assembly Inside key antenna
Outside key antenna (back door) CAN communication system BCM
Automatic back door control module
Back door open function ×××××××××
JMKIA5435GB
Revision: 2010 May2011 QX56