2011 INFINITI QX56 Back door

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-14
< SYSTEM DESCRIPTION >
COMPONENT PARTS
AUTOMATIC BACK DOOR SYSTEM : Component Parts Location
INFOID:0000000006225835
1. Combination meter 2. BCM
Refer to BCS-4, "
BODY CONTROL
SYSTEM : Component Parts Loca-
tion"
3. ABS actuator and electric unit
Refer to BRC-10, "
Component Parts
Location"
4. Automatic back door switch 5. Automatic back door main switch 6. Automatic back door control module
JMKIA5223ZZ
Revision: 2010 May2011 QX56

COMPONENT PARTSDLK-15
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AUTOMATIC BACK DOOR SYST EM : Component DescriptionINFOID:0000000006225836
7. Touch sensor LH 8. Back door request switch 9. Back door lock assembly
10. Back door opener switch 11. Automatic back door close switch 12. Automatic back door warning buzzer
13. Touch sensor RH
A. View with luggage side finisher up-
per removed B. View with back door finisher inner re-
moved
Item Function
Automatic back door control mod-
ule Automatic back door control unit, encoder, automatic back door motor and clutch are in-
stalled
 Automatic back door control unit: Controls the automatic back door system
 Encoder: Automatic back door control unit receives the pulse signals from encoders A
and B that occurred due to synchronization with the back door operation. The automatic
back door control unit calculates the back door position, operation direction, and opera-
tion speed according to the received pulse signals.
 Automatic back door motor: Inputs open/close signal from automatic back door control
unit and activates the automatic back door open/close operation.
 Clutch: Performs the duty control of the power supply to control the operation speed of the back door.
BCM Transmits and receives signals to the automatic back door control module
ABS actuator and electric unit Transmits vehi cle speed signal to CAN communication line
Combination meter Transmits vehicle speed signal to CAN communication line
Automatic back door warning buzz-
er Warns the user of the automatic back door condition and inappropriate operations with the
buzzer sounds
Touch sensor LH/RH During back door close operation, the touch sensor detects any trapped foreign material
Back door opener switch Detects if back door opener switch is press/release
Back door request switch Detects if back door request switch is press/release
Automatic back door switch Detects if automatic back door switch is press/release
Automatic back door main switch Detects if automatic back door main switch is press/release
Automatic back door close switch Detects if automatic back door close switch is press/release
Back door lock assembly Back door closure motor, half latch switch, open switch, close switch and back door switch
are installed
 Closure motor: Inputs open/close signal from automatic back door control unit and acti-
vates the back door auto closure operation
 Half latch switch: Starts the closure motor close operation
 Open switch: Stops the closure motor open operation
 Close switch: Stops the closure motor close operation
 Back door switch: Inputs back door open/ close condition to BCM
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

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
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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

DLK-22
< SYSTEM DESCRIPTION >
SYSTEM (INTELLIGENT KEY SYSTEM)
 The back door open function can open the back door by pressing the back door opener switch while carryingthe Intelligent Key and all doors (except back door) are locked.
 The back door open function enables the back door to be opened by pressing back door opener switch after
BCM transmits UNLOCK signal to each door.Refer to DLK-31, "
System Description".
BACK DOOR OPEN
While back door open in the permitted state, back door opens when back door opener switch is pressed after
back door request switch is operated. Back door open also can be operated according to the following proce-
dure.
 When the BCM detects that back door opener switch is pressed, it activates the outside key antenna (back
door) and inside key antenna and transmits the request signal to the Intelligent Key. And then, check that the
Intelligent Key is near the back 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.
 If the verification result is OK, BCM transmits the back door open request signal to automatic back door con- trol unit via CAN communication.
 Automatic back door control unit transmits back door open request signal to back door lock assembly and
back door is open.
 When the back door is open, automatic back door sys tem performs waiting operation for next back door
close operation.
The operation of then back door open is the same as the automatic back door system, refer to DLK-31,
"System Description".
OPERATION CONDITION
If the following conditions are not satisfied, ba ck door open operation is not performed even if the back door
opener switch is operated.
OUTSIDE KEY ANTENNA DETECTION AREA
The outside key antenna detection area of back door open function
is in the range of approximately 80 cm (31.50 in) surrounding the
outside key antenna (back door) (1). However, this operating range
depends on the ambient conditions.
LIST OF OPERATION RELATED PARTS
Parts marked with × are the parts related to operation.
Back door opener switch operation Operation condition
Back door open  Vehicle speed is less than 5 km/h (3 MPH)
 Intelligent Key is within outside key antenna (back door) de-
tection area
 Back door is closed
 Panic alarm is not activated
JMKIA5225ZZ
Revision: 2010 May2011 QX56