2009 INFINITI QX56 diagram

DLK-10
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
AUTOMATIC DOOR LOCKS
FUNCTION DIAGNOSIS
AUTOMATIC DOOR LOCKS
System DiagramINFOID:0000000004190626
System DescriptionINFOID:0000000004190627
DOOR LOCK FUNCTION
• The door lock and unlock switch (driver side) is built into power window main switch.
• The door lock and unlock switch (passenger side) is on door trim.
• Interlocked with the locking operation of door lock and
unlock switch, door lock actuators of all doors are
locked.
• Interlocked with the unlocking operation of door lock and unlock switch, door lock actuators of all doors are
unlocked.
Door Key Cylinder
• With the door key inserted in the door key cylinder on driver side, turning it to “LOCK”, will lock door lock
actuator of all doors.
• With the door key inserted in the door key cylinder on driver side, turning it to “UNLOCK” onc\
e unlocks the driver side door lock actuator; turning it to “UNLOCK” again within 5 seconds after the first unlock operation
unlocks all of the other doors. - (SELECTIVE UNLOCK OPERATION)
Selective unlock operation mode can be changed usi ng “DOOR LOCK-UNLOCK SET” mode in “WORK SUP-
PORT”. Refer to DLK-52, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
AUTOMATIC DOOR LOCKS (LOCK OPERATION)
The automatic door locks function is the function that locks all doors linked with the vehicle speed.
Vehicle Speed Sensing Auto Door Lock*1
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 15 MPH (24 km/h) or more.
ALKIA1482GB
Input SingleFunction Actuator
Door lock/unlock switch Door lock/unlock signal Door lock function
Each door lock actuator
Door key cylinder switch
Each door switch
Door open/close signal
Key reminder function
Combination meter Warning buzzer signal
Vehicle speed signal
Automatic door lock/unlock
function
TCM Shift position signal
Revision: December 20092009 QX56

DLK-14
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION
DOOR LOCK FUNCTION
DOOR LOCK AND UNLOCK SWITCH
DOOR LOCK AND UNLOCK SWITCH : System DiagramINFOID:0000000003775675
DOOR LOCK AND UNLOCK SW
ITCH : System DescriptionINFOID:0000000003775676
DOOR LOCK FUNCTION
Functions Available by Operating the Door Lock an d Unlock Switches on Driver Door and Passenger Door
• Interlocked with the locking operation of door lock and unlock switch, door lock actuators of all door lock
actuators are locked.
• Interlocked with the unlocking operation of door lock and unlock switch, door lock actuators of all door lock
actuators are unlocked.
Functions Available by Operating the Key Cylinder Switch on Driver Door
• Interlocked with the locking operation of door key cyli nder, door lock actuators of all door lock actuators are
locked.
Selective Unlock Operation
• When door key cylinder is unlocked, door lo ck actuator driver side is unlocked.
• When door key cylinder is unlocked for the second time within 5 seconds after the first operation, door lock actuators on all doors are unlocked.
Select unlock operation mode can be changed using DOOR LOCK-UNLOCK SET mode in “WORK SUP-
PORT”. Refer to DLK-52, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
Key Reminder System
Refer to DLK-44, "System Description".
ALKIA0703GB
Switch Input/output signal to BCM BCM functionActuator
Main power window and door
lock/unlock switch Door lock/unlock signal Door lock/unlock control Door lock actuator
Power window and door lock/
unlock switch
Door key cylinder switch
Revision: December 20092009 QX56

DLK-16
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DOOR LOCK FUNCTION
DOOR REQUEST SWITCH
DOOR REQUEST SWITCH : System DiagramINFOID:0000000003775679
DOOR REQUEST SWITCH : System DescriptionINFOID:0000000003775680
Only when pressing the request switch, it is possible
to lock and unlock the door by carrying the Intelligent
Key.
• The Intelligent Key system is a system 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 communications between the Intelligent Key and the vehicle (BCM).
CAUTION:
The driver should always carry the Intelligent Key
• If an action that does not meet the operating conditions of the Intelligent Key system is taken, the buzzer
goes off to inform the driver (Warning chime function).
• When a door lock is locked or unlocked with request switch or remote controller button operation, the hazard
lamps flash and the Intelligent Key warning buzzer or horn sounds (Hazard and buzzer/horn reminder func-
tion).
• The settings for each function can be changed with the 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 the CONSULT-III.
OPERATION DESCRIPTION/DOOR LOCK/UNLOCK
• When the BCM detects that each door request switch is pressed, it starts the outside key antenna and inside
key antenna corresponding to the pressed door request swit ch and transmits the request signal to the Intelli-
gent Key. And then, check that t he 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 sends the door lock/unlock signal and sounds Intelli gent Key buzzer warning (lock: 2 times, unlock: 1
time) at the same time as a reminder.
OPERATION CONDITION
If the following conditions are not satisfied, door lock/unlock operation is not performed even if the request
switch is operated.
Door switch Transmits door open/close condition to BCM.
Passenger select unlock relay Enables or disables the unlocking of rear doors when this Intelligent Key option is selected. Item
Function
ALKIA0704GB
Revision: December 20092009 QX56

DOOR LOCK FUNCTIONDLK-21
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DOOR REQUEST SWITCH : Component DescriptionINFOID:0000000003775682
INTELLIGENT KEY
INTELLIGENT KEY : System DiagramINFOID:0000000003775683
INTELLIGENT KEY : System DescriptionINFOID:0000000003775684
The Intelligent Key has the same functions as the remote control entry system. In addition to other safety fea-
tures, it can be used to lock and unlock all doors as well as open the back door.
OPERATION DESCRIPTION/DOOR LOCK/UNLOCK FUNCTION
• When door lock/unlock button of the Intelligent Key is pressed, lock signal or unlock signal is transmitted from Intelligent Key to BCM via remote keyless entry receiver and Intelligent Key unit.
• When BCM receives the door lock/unlock signal, it oper ates door lock actuator, flashes the hazard lamp
(lock: 2 times, unlock: 1 time) and horn chirp signal to IPDM E/R at the same time as a reminder.
• IPDM E/R honks horn (lock: 2 times) as a reminder
OPERATION CONDITION
OPERATION AREA
• Operating Range
Item Function
Intelligent Key unit Receives lock/unlock signal from re mote keyless entry receiver, and then transmits to BCM.
BCM Controls the door lock function and room lamp function.
Door lock and unlock switch Transmits lock or unlock signal to BCM.
Door lock actuator Receives lock/unlock signal from BCM and locks/unlocks each door.
Door switch Transmits door open/close condition to BCM.
Remote keyless entry receiver Receives lock/unlock signal from the Intelligent Key, and then transmits to Intelligent Key unit.
Request switch Transmits lock/unlock operation to Intelligent Key unit.
Intelligent Key Transmits button operation to remote keyless entry receiver.
Outside key antenna Detects if Intelligent Key is outside the vehicle.
Inside key antenna Detects if Intelligent Key is inside the vehicle.
Intelligent Key warning buzzer Warns the user of the lock/unlock condition and inappropriate operations with the buzzer sound.
ALKIA0704GB
Remote controller operation Operation conditionOperation
Lock • All doors closed All doors lock
Unlock • Intelligent Key is out of the ignition key cylinder All doors unlock
Revision: December 20092009 QX56

BACK DOOR OPENER FUNCTIONDLK-27
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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BACK DOOR OPENER FUNCTION
BACK DOOR OPENER SWITCH
BACK DOOR OPENER SWITCH : System DiagramINFOID:0000000003775687
BACK DOOR OPENER SWITCH : System DescriptionINFOID:0000000003775688
BACK DOOR OPENER OPERATION
NOTE:
The automatic back door system must be initialized by fully closing the back door anytime the battery
power is lost to the back door control unit. Refer to DLK-9, "
ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL : Description".
The automatic back door system consists of a one piec e unit that combines the back door control unit along
with the back door motor, back door clutch and the ba ck door encoder. The back door latch contains a lock
function that can control the two functions of autom atic back door latch closure and electrical opener with a
single motor when you close the back door to the halfway-state.
• Back door auto closure When the back door is closed to the halfway state (half- latch) position, the motor automatically drives to
rotate the latch lever and pull it in from half latched to full latched.
• Power back door With the back door closed, if you press the power liftgat e switch or press the keyfob button, or pull the back
door handle with the back door unlocked, the back door latch motor drives the open the locking plate and
releases the latch. The back door motor t hen raises the door to the full open position.
With the back door fully open, if you press the power liftgate switch, keyfob button or the back door close
switch, the back door motor closes the door to the half-latch state. The back door latch motor then drives the
latch to the full close position.
At the onset of each power open or power close applic ation, the hazard lamps will flash 3 times and the
warning chime will sound 3 dings lasting a total of 2 seconds.
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 back
door opener request switch (1). However, this operating range
depends on the ambient conditions.
OPERATION DESCRIPTION
ALKIA0705GB
ALKIA0581ZZ
Revision: December 20092009 QX56

BACK DOOR OPENER FUNCTIONDLK-33
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY
INTELLIGENT KEY : System DiagramINFOID:0000000003775691
INTELLIGENT KEY : System DescriptionINFOID:0000000003775692
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 back door open button.
OPERATION DESCRIPTION/BACK DOOR OPEN FUNCTION
• When back door button of the Intelligent Key is press ed, the back door open signal is transmitted from the
Intelligent Key to the back door control unit via remote keyless entry receiver and the Intelligent Key unit.
• When back door control unit receives the back door open request signal, it operates the back door motor
and opens the liftgate.
OPERATION CONDITION
OPERATION AREA
• Operating Range
• To ensure the Intelligent Key works effectively, use within 80 cm range of each door, however the operable range may differ according to surroundings.
HAZARD AND HORN REMINDER FUNCTION
When doors are locked or unlocked by Intelligent Key. BCM flashes hazard warning lamps as a reminder and
transmits horn chirp signal to IPDM E/R. IPDM E/R sound horns as a reminder.
The hazard and horn reminder has a horn chirp m ode (C mode) and a non-horn chirp mode (S mode).
Operating function of hazard and horn reminder
Hazard and horn reminders do not operate if any door switch is ON (any door is OPEN).
How to change hazard and horn reminder mode
With CONSULT-III
Refer to DLK-55, "
INTELLIGENT KEY : CONSULT-III F unction (BCM - INTELLIGENT KEY)".
Without CONSULT-III
Refer to Owner's Manual for instructions.
LIST OF OPERATION RELATED PARTS
Parts marked with × are the parts related to operation.
ALKIA0704GB
Remote controller operation Operation conditionOperation
Back door open • Press and hold the back door open button for 0.5 second or more Back door opens
C mode S mode
Intelligent Key operation Lock Unlock Back door open Lock Unlock Back door open
Hazard warning lamp flash Twice Once —Twice ——
Horn sound Once— ——— —
Revision: December 20092009 QX56

HAZARD AND BUZZER REMINDER FUNCTIONDLK-47
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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HAZARD AND BUZZER REMINDER FUNCTION
System DiagramINFOID:0000000003775699
HAZARD & BUZZER REMINDER FUNCTION
System DescriptionINFOID:0000000003775700
HAZARD AND BUZZER REMINDER FUNCTION
When door is locked or unlocked by Intelligent Key or door request switch, Intelligent Key unit sounds buzzer
and sends hazard request signal to BCM via CAN comm unication. Then BCM flashes hazard warning lamps
as a reminder.
NOTE:
Hazard and buzzer reminder function mode can be changed with CONSULT-III. Refer to DLK-56, "
CONSULT-
III Function (INTELLIGENT KEY)".
JMKIA0506GB
Revision: December 20092009 QX56

DLK-108
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HORN FUNCTION
HORN FUNCTION
DescriptionINFOID:0000000003775782
Perform answer-back for each operation with horn.
Component Function CheckINFOID:0000000003775783
1.CHECK FUNCTION
1. Select "HORN" in “ACTIVE TEST” mode with CONSULT-III.
2. Check the horn (high/low) operation.
Is the operation normal?
YES >> Inspection End.
NO >> Go to DLK-108, "
DiagnosisProcedure".
Diagnosis ProcedureINFOID:0000000003775784
1.CHECK HORN FUNCTION
Check horn function with horn switch
Do the horns sound?
YES >> GO TO 2
NO >> Go to HRN-4, "
Wiring Diagram".
2.CHECK HORN RELAY POWER SUPPLY
1. Turn ignition switch ON.
2. Perform “ACTIVE TEST”, "HORN" with CONSULT-Ill.
3. Using an oscilloscope or analog voltmeter, check voltage between horn relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4
NO >> GO TO 3
3.CHECK HORN RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.
Test item Description
HORN ON Horn relay ON (for 20 ms)
ALKIA0658ZZ
Horn relay
Ground Test item Voltage (V)
(Approx.)
Connector Terminal
H-1 1 Ground HORN ON
Battery voltage → 0 → Battery voltage
Other than above Battery voltage
Revision: December 20092009 QX56