2011 INFINITI QX56 Fuel

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FUEL LID LOCK ACTUATOR DOES NOT OP-
ERATE ............................................................ ..
176
Diagnosis Procedure ........................................... ..176
IGNITION POSITION WARNING FUNCTION
DOES NOT OPERATE .....................................
177
Diagnosis Procedure ........................................... ..177
SELECTIVE UNLOCK FUNCTION DOES
NOT OPERATE ................................................
178
Diagnosis Procedure ........................................... ..178
AUTO DOOR LOCK OPERATION DOES NOT
OPERATE .........................................................
179
Diagnosis Procedure ........................................... ..179
VEHICLE SPEED SENSING AUTO LOCK
OPERATION DOES NOT OPERATE ..............
180
Diagnosis Procedure ........................................... ..180
IGN OFF INTERLOCK DOOR UNLOCK
FUNCTION DOES NOT OPERATE .................
181
Diagnosis Procedure ........................................... ..181
P RANGE INTERLOCK DOOR LOCK/UN-
LOCK FUNCTION DOES NOT OPERATE ......
182
Diagnosis Procedure ........................................... ..182
HAZARD AND HORN REMINDER DOES
NOT OPERATE ................................................
183
Diagnosis Procedure ........................................... ..183
HAZARD AND BUZZER REMINDER DOES
NOT OPERATE ................................................
184
Diagnosis Procedure ........................................... ..184
KEY REMINDER FUNCTION DOES NOT OP-
ERATE ..............................................................
185
Diagnosis Procedure ........................................... ..185
WELCOME LIGHT FUNCTION DOES NOT
OPERATE .........................................................
186
Diagnosis Procedure ........................................... ..186
OFF POSITION WARNING DOES NOT OP-
ERATE ..............................................................
188
Diagnosis Procedure ........................................... ..188
P POSITION WARNING DOES NOT OPER-
ATE ...................................................................
189
Description .......................................................... ..189
Diagnosis Procedure .............................................189
ACC WARNING DOES NOT OPERATE .........191
Description .......................................................... ..191
Diagnosis Procedure .............................................191
TAKE AWAY WARNING DOES NOT OPER-
ATE ...................................................................
192
Description .......................................................... ..192
Diagnosis Procedure .............................................192
KEY ID WARNING DOES NOT OPERATE ....194
Description ........................................................... ..194
Diagnosis Procedure .............................................194
INTELLIGENT KEY LOW BATTERY WARN-
ING DOES NOT OPERATE ............................
195
Description .............................................................195
Diagnosis Procedure .............................................195
DOOR LOCK OPERATION WARNING DOES
NOT OPERATE ...............................................
197
Diagnosis Procedure .............................................197
AUTOMATIC BACK DOOR OPERATION
DOES NOT OPERATE ....................................
198
ALL SWITCHES ..................................................... ..198
ALL SWITCHES : Description ...............................198
ALL SWITCHES : Diagnosis Procedure ................198
AUTOMATIC BACK DOOR SWITCH .................... ..199
AUTOMATIC BACK DOOR SWITCH : Descrip-
tion .........................................................................
199
AUTOMATIC BACK DOOR SWITCH : Diagnosis
Procedure ..............................................................
199
AUTOMATIC BACK DOOR CLOSE SWITCH ........199
AUTOMATIC BACK DOOR CLOSE SWITCH :
Description ........................................................... ..
199
AUTOMATIC BACK DOOR CLOSE SWITCH : Di-
agnosis Procedure .................................................
199
INTELLIGENT KEY ................................................ ..200
INTELLIGENT KEY : Description ..........................200
INTELLIGENT KEY : Diagnosis Procedure ......... ..200
BACK DOOR OPENER SWITCH .......................... ..200
BACK DOOR OPENER SWITCH : Description .....200
BACK DOOR OPENER SWITCH : Diagnosis Pro-
cedure ....................................................................
200
OPEN/CLOSURE FUNCTION ............................... ..201
OPEN/CLOSURE FUNCTION : Description .........201
OPEN/CLOSURE FUNCTION : Diagnosis Proce-
dure .......................................................................
201
OPEN FUNCTION .................................................. ..202
OPEN FUNCTION : Description ............................202
OPEN FUNCTION : Diagnosis Procedure ............202
CLOSURE FUNCTION .......................................... ..202
CLOSURE FUNCTION : Description .....................202
CLOSURE FUNCTION : Diagnosis Procedure .....203
AUTOMATIC BACK DOOR WARNING DOES
NOT OPERATE ...............................................
204
BUZZER ................................................................. ..204
BUZZER : Description ...........................................204
BUZZER : Diagnosis Procedure ............................204
HAZARD WARNING LAMP ................................... ..204
HAZARD WARNING LAMP : Description ..............204
Revision: 2010 May2011 QX56

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Exploded View ....................................................
..
243
DOOR LOCK ......................................................... ..243
DOOR LOCK : Removal and Installation ..............243
INSIDE HANDLE ................................................... ..243
INSIDE HANDLE : Removal and Installation ........244
OUTSIDE HANDLE ............................................... ..244
OUTSIDE HANDLE : Removal and Installation ....244
BACK DOOR LOCK .........................................246
Exploded View .................................................... ..246
DOOR LOCK ......................................................... ..246
DOOR LOCK : Removal and Installation ..............246
TOUCH SENSOR .................................................. ..246
TOUCH SENSOR : Removal and Installation .......246
BACK DOOR SUPPORT ROD .............................. ..247
BACK DOOR SUPPORT ROD : Removal and In-
stallation ................................................................
247
EMERGENCY LEVER ........................................... ..247
EMERGENCY LEVER : Unlock procedures .........247
FUEL FILLER LID OPENER ............................248
Exploded View .................................................... ..248
Removal and Installation .......................................248
KEY CYLINDER ...............................................250
GLOVE BOX LID KEY CYLINDER ....................... ..250
GLOVE BOX LID KEY CYLINDER : Removal and
Installation .............................................................
250
CAB MOUNTING INSULATOR ........................251
Exploded View .................................................... ..251
Removal and Installation .......................................251
DOOR SWITCH ................................................254
Removal and Installation ..................................... ..254
DOOR REQUEST SWITCH ..............................255
DRIVER SIDE ........................................................ ..255
DRIVER SIDE : Removal and Installation .............255
PASSENGER SIDE .................................................255
PASSENGER SIDE : Removal and Installation .. ..255
BACK DOOR ......................................................... ..255
BACK DOOR : Removal and Installation ..............255
INSIDE KEY ANTENNA ..................................256
INSTRUMENT CENTER ........................................ ..256
INSTRUMENT CENTER : Removal and Installa-
tion .........................................................................
256
CONSOLE .............................................................. ..256
CONSOLE : Removal and Installation ...................256
LUGGAGE ROOM ................................................. ..256
LUGGAGE ROOM : Removal and Installation ......256
OUTSIDE KEY ANTENNA ..............................257
DRIVER SIDE ......................................................... ..257
DRIVER SIDE : Removal and Installation .............257
PASSENGER SIDE ..................................................257
PASSENGER SIDE : Removal and Installation .. ..257
BACK DOOR ......................................................... ..257
BACK DOOR : Removal and Installation ...............257
INTELLIGENT KEY WARNING BUZZER .......258
Removal and Installation .......................................258
REMOTE KEYLESS ENTRY RECEIVER .......259
Removal and Installation .......................................259
INTELLIGENT KEY BATTERY .......................260
Removal and Installation .......................................260
BACK DOOR CONTROL UNIT ......................261
Removal and Installation ..................................... ..261
AUTOMATIC BACK DOOR CONTROL MOD-
ULE ..................................................................
262
Removal and Installation .......................................262
AUTOMATIC BACK DOOR WARNING BUZZ-
ER ....................................................................
263
Removal and Installation .......................................263
AUTOMATIC BACK DOOR MAIN SWITCH ...264
Removal and Installation .......................................264
AUTOMATIC BACK DOOR CLOSE SWITCH .265
Removal and Installation ..................................... ..265
AUTOMATIC BACK DOOR SWITCH .............266
Removal and Installation .......................................266
Revision: 2010 May2011 QX56

DLK-12
< SYSTEM DESCRIPTION >
COMPONENT PARTS
DOOR LOCK SYSTEM : Component Description
INFOID:0000000006225834
1. Fuel lid lock actuator 2. Remote keyless entry receiver 3. Inside key antenna (luggage room)
4. Inside key antenna (console) 5. Air bag diagnosis sensor unit Refer to SRC-8, "
Component Parts
Location"
6. A/T assembly (TCM)
Refer to TM-10, "
A/T CONTROL
SYSTEM : Component Parts Loca-
tion"
7. Inside key antenna (instrument cen-
ter) 8. IPDM E/R
Refer to PCS-4, "
Component Parts
Location"
9. Horn
10. Intelligent Key warning buzzer 11. BCM Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion"
12. Power window main switch (door
lock and unlock switch)
13. Outside key antenna (driver side) 14. Front door switch (driver side) 15. Front door lock assembly (driver side)
16. Front door request switch (driver side)
A. View with luggage side finisher lower LHD and rear speaker removed B. View with luggage side finisher up-
per removed C. Under the second seat seatback
D. View with console rear finisher re- moved E. View with cluster lid C removed F. Engine room LH
1. Push-button ignition switch 2. Back door request switch 3. Outside key antenna (back door)
4. Back door opener switch 5. Back door lock assembly 6. Front door lock assembly (passen- ger side)
7. Front door switch (passenger side) 8. Front door request switch (passen- ger side)9. Outside key antenna (passenger
side)
A. View with back door finisher inner re- moved
JMKIA5218ZZ
Item Function
BCM Controls the door lock system
IPDM E/R Sounds horn via CAN communication between BCM
Air bag diagnosis sensor unit  Transmits air bag signal to BCM
 Refer to
SRC-9, "
Component Description"
Revision: 2010 May2011 QX56

COMPONENT PARTSDLK-13
< SYSTEM DESCRIPTION >
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AUTOMATIC BACK DOOR SYSTEM
Combination meter  Displays each operation method guide and warning for system malfunction
 Performs operation method guide and warning with buzzer
 Transmits vehicle speed signal to CAN communication line
TCM Transmits shift position signal to BCM via CAN communication line
Remote keyless entry receiver Receives Intelligent Key operation and transmits to BCM
Inside key antenna Detects if Intelligent Key is inside the vehicle
Outside key antenna Detects if Intelligent Key is outside the vehicle
Push-button ignition switch Inputs push-button ignition switch ON/OFF condition to BCM
Door switch Inputs door open/close condition to BCM
Door lock and unlock switch  Detects if door lock and unlock switch is press/release
 Integrated in the power window main switch and front power window switch (passenger
side)
Door request switch  Detects if each door request switch is press/release
 Integrated in the outside handle (driver side, passenger side) and back door opener
switch assembly
Intelligent Key warning buzzer Warns the user of the lock/unlock condition and inappropriate operations with the buzzer
sound
Intelligent Key The following functions are available when having and carrying electronic ID
 Door lock/unlock
 Engine start
 Remote control entry function is available when operating on button
Hazard warning lamp Warns the user of the lock/unlock condition and inappropriate operations with the lamps
blink
Door lock actuator Output lock/unlock signal from BCM and locks/unlocks each door
Fuel lid lock actuator Output lock/unlock signal from BCM and locks/unlocks fuel filler lid Item Function
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-20
< SYSTEM DESCRIPTION >
SYSTEM (INTELLIGENT KEY SYSTEM)
OPERATION CONDITION
If the following conditions are satisfied, door lock/unlock operation is performed if the door request switch is
operated.
*: Even with a registered Intelligent Key remaining inside the vehicle, door locks can be locked/unlocked from outside of the v ehicle with
a spare Intelligent Key as long as key IDs are different.
OUTSIDE KEY ANTENNA DETECTION AREA
The outside key antenna detection area of door lock/unlock function
is in the range of approximately 80 cm (31.50 in) surrounding the
driver, passenger door handles (1) and back door handle (2). How-
ever, this operating range depends on the ambient conditions.
SELECTIVE UNLOCK FUNCTION
Lock Operation
When an LOCK signal is sent from door request switch (driver side, passenger side, back door), all doors and
fuel filler lid are locked.
Unlock Operation
 When an UNLOCK signal from driver side door request swit ch is transmitted, driver side door and fuel filler
lid are unlocked. When another UNLOCK signal is tr ansmitted within 60 seconds, all other doors (except
back door) are unlocked.
 When an UNLOCK signal from passenger side door reques t switch is transmitted, passenger side door is
unlocked. When another UNLOCK signal is transmitt ed within 60 seconds, all other doors (except back
door) and fuel filler lid are unlocked.
 When an UNLOCK signal from back door request switch is transmitted, back door open permission is set.
When another UNLOCK signal is transmitted within 60 seconds, all doors (except back door) and fuel filler
lid are unlocked.
How To Change Selective Unlock Operation Mode
Selective unlock operation mode can be changed using CONSULT-III.
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLIGENT KEY)".
HAZARD AND BUZZER REMINDER FUNCTION
During lock or unlock operation by each door request switch, the hazard warning lamps and Intelligent Key
warning buzzer blinks or honks as a reminder.
Operating Function Of Hazard And buzzer Reminder
Hazard and buzzer reminder does not operate in the following conditions.
 Ignition switch position is ON
Each door request switch operation Operation condition
Lock  All doors are closed
 Panic alarm is not activated
 P position warning is not activated
 Intelligent Key is outside the vehicle
 Intelligent Key is within outside key antenna detection area*
Unlock  Panic alarm is not activated
 Intelligent Key is outside the vehicle
 Intelligent Key is within outside key antenna detection area*
JMKIA5224ZZ
Operation Hazard warning lamp blinks Intelligent Key warning buzzer honks
Unlock Once OnceLock Twice Twice
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