2011 INFINITI QX56 engine

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

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)
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< SYSTEM DESCRIPTION >
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 When the BCM detects that the Intelligent Key is within the outside key antenna detection area. BCM trans-
mits the request signal to the Intelligent Key and check it is near the door.
 Intelligent Key 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 illuminates lamps that are set, when key ID verification is OK.
TIMER FUNCTION
BCM can operate welcome light function, using the timer function, for 9 days, after key switch is turned OFF.
The timer function resets when the engine is started
*.Operating period of timer function may differ depending
on battery size.
*: Timer function does not stop if another Intelligent Key that has a different key ID is detected within the inte-
rior antenna detection area, when starting the engine.
OPERATION CONDITION
If the following condition are satisfi ed, welcome light function is operated.
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.
WELCOME LIGHT FUNCTION SETTING
Welcome light function operation mode can be changed using CONSULT-III
With CONSULT-III
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III F unction (BCM - INTELLIGENT KEY)".
Without CONSULT-III
The welcome light function ON/OFF can be s witched by performing the following operation.
1. Turn ignition switch: OFF →ON
2. Press and hold the driver side door request switch for 5 seconds or more within 20 seconds after turning the ignition switch ON.
3. The switching is complete when combination meter buzzer sounds.
WARNING FUNCTION
WARNING FUNCTION : System DescriptionINFOID:0000000006225851
OPERATION DESCRIPTION
The warning function are as per the following items and are given to the user as warning information and
warnings using combinations of Intelligent Key warning buzzer, combination meter buzzer, KEY warning lamp
and information display in combination meter.
 Intelligent Key system malfunction
 OFF position warning
 P position warning
 ACC warning
Function Operation condition
Welcome light function  All door are closed
 All doors is locked
 Ignition switch: OFF position
 Shift position: P position
 Intelligent Key is outside the vehicle
 Timer function is activated
JMKIA5224ZZ
Revision: 2010 May2011 QX56

DLK-28
< SYSTEM DESCRIPTION >
SYSTEM (INTELLIGENT KEY SYSTEM)
 Take away warning
 Door lock operation warning
 Engine start information
 Steering lock information
 Intelligent Key low battery warning
 Key ID warning
 Key ID verification information
OPERATION CONDITION
Once the following condition from below is established, alert or warning is executed.
WARNING METHOD
The following table shows the alarm or warning methods with chime.
Warning/Information functions Operation procedure
Intelligent Key system malfunction When a malfun ction is detected on BCM, “KEY” warning lamp illuminates
OFF position warning For internal
 Ignition switch: ACC position
 Door switch (driver side
): ON (Door is open)
For external OFF position warning (For internal) is in active mode, driver side door is
closed
NOTE:
OFF position (For external) active only when each of the sequence occurs
as below: P position warning
→ ACC warning → OFF position warning (For
internal) → OFF position warning (For internal)
P position warning For internal
 Shift position: Except P position
 Engine is running to stopped (Ignition switch is ON to OFF)
For external Warning is activated when driver door is closed from the open position
while the P position warning (for inside vehicle) is ON
ACC warning  When P position warning is in active mode, shift position changes P po-
sition
 Ignition switch: ACC position
Ta k e a w a y w a r n i n g Door is open to close
 Ignition switch: Except LOCK position
 Door switch: ON to OFF (Door is open to close)
 Intelligent Key cannot be detected inside the vehicle
Door is open  Door switch: ON (Door is open)
 Key ID verification every 5 seconds when registered Intelligent Key can-
not be detected inside the vehicle
Push-button ignition
switch operation  Ignition switch: Except LOCK position
 Press push-button ignition switch
 Intelligent Key cannot be detected inside the vehicle
Door lock operation warning When door lock operation is requested while door lock operating condition
of door request switch or Intelligent Key are not satisfied
Engine start information Ignition switch is ON po-
sition
 Ignition switch: ON position
 Shift position: P position*
 Engine is stopped
Ignition switch is except
ON position  Ignition switch: Except ON position
 Shift position: P position*
 Intelligent Key is inserted in key slot or Intelligent Key can be detected
inside the vehicle
Steering lock information When steering lock cannot be released after ignition switch is turned ON
Intelligent Key low battery warning When Intelligent Key is low battery, BCM is detected after ignition switch is
turned ON
Key ID warning When registered Intelligent Key cannot be detected inside the vehicle after
ignition switch is turned ON
Key ID verification information  When registered Intelligent Key cannot be detected inside the vehicle
 Intelligent Key battery is discharged
 When NATS antenna amp cannot be detected NATS ID
Revision: 2010 May2011 QX56

SYSTEM (INTELLIGENT KEY SYSTEM)
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Warning/Information functions “KEY”
warning
lamp Information display
(combination meter) Warning chime
Combination
meter buzzer Intelligent Key
warning buzzer
Intelligent Key system malfunction Indicate — — —
OFF position
warning For internal — — Activate —
For external — — — Activate
P position
warning For internal
— Activate —
For external —Active
ACC warning — Activate —
Ta k e a w a y
warning Door is open to
close
— Activate Activate
Door is open ——
Push button-igni-
tion switch opera-
tion Activate —
Door lock op-
eration warn-
ing Request switch
operation
—— —Activate
Intelligent Key — — — Activate
Key ID warning — — —
Engine start information — — —
Steering lock information — — —
JMKIA0037GB
JMKIA0047GB
JMKIA4906ZZ
JMKIA4906ZZ
JMKIA0032GB
JMKIA0033GB
Revision: 2010 May2011 QX56

DLK-30
< SYSTEM DESCRIPTION >
SYSTEM (INTELLIGENT KEY SYSTEM)
LIST OF OPERATION RELATED PARTS
Parts marked with × are the parts related to operation.
Intelligent Key low battery warning — — —
Key ID verification information — — — Warning/Information functions
“KEY”
warning lamp Information display
(combination meter) Warning chime
Combination
meter buzzer Intelligent Key
warning buzzer
JMKIA3049ZZ
JMKIA4907ZZ
Warning function
Intelligent Key
Ignition switch
Door switch
Door request switch Inside key antenna
Outside key antenna
Intelligent Key warning buzzer Combination meter buzzer
CAN communication system BCM
Information display
“KEY” warning lamp
Intelligent Key system malfunction ×× ×
OFF position warning For internal
××××
For external ×××
P position warning × ×××××
ACC warning ×××××
Take away warning Door is open or close
× × × ××××××
Door is open × × × ××××
Push-button ignition switch
operation ×× × ×××××
Door lock operation warning × ××××× ×
Key ID warning × × ××××
Engine start information Ignition switch is ON position
×× × ×××
Ignition switch is except ON
position ×× × ×××
Steering lock information ××××
Intelligent Key low battery warning × × ××××
Key ID verification information ×××××
Revision: 2010 May2011 QX56

DLK-38
< SYSTEM DESCRIPTION >
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)INFOID:0000000006307583
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate ea ch device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
IVIS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)DLK-39
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DOOR LOCK
DOOR LOCK : CONSULT-III Fu nction (BCM - DOOR LOCK)INFOID:0000000006225855
BCM CONSULT-III FUNCTION
CONSULT-III performs the following functions via CAN communication with BCM.
WORK SUPPORT
CONSULT screen item Indication/Unit Description
Vehicle Speed km/h Vehicle speed of the moment a particular DTC is detected
Odo/Trip Meter km Total mileage (Odometer value) of the moment a particular DTC is detected
Vehicle Condition SLEEP>LOCK
Power position status of
the moment a particular
DTC is detected While turning BCM status from low power consumption mode to
normal mode (Power supply position is “LOCK”)
SLEEP>OFF While turning BCM status from low power consumption mode to
normal mode (Power supply position is “OFF”.)
LOCK>ACC While turning power supply position from “LOCK” to “ACC”
ACC>ON While turning power supply position from “ACC” to “IGN”
RUN>ACC While turning power supply position
from “RUN” to “ACC” (Vehicle
is stopping and selector lever is except P position.)
CRANK>RUN While turning power su
pply position from “CRANKING” to “RUN”
(From cranking up the engine to run it)
RUN>URGENT While turning power su
pply position from “RUN“ to “ACC” (Emer-
gency stop operation)
ACC>OFF While turning power supply position from “ACC” to “OFF”
OFF>LOCK While turning power supply position from “OFF” to “LOCK”
OFF>ACC While turning power supply position from “OFF” to “ACC”
ON>CRANK While turning po wer supply position from “IGN” to “CRANKING”
OFF>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “OFF”.) to low power consumption mode
LOCK>SLEEP While turning BCM status from normal mode (Power supply posi-
tion is “LOCK”.) to low power consumption mode
LOCK Power supply position is “LOCK” (Ignition switch OFF with steer-
ing is locked.)
OFF Power supply position
is “OFF” (Ignition switch OFF with steering
is unlocked.)
ACC Power supply position is “ACC” (Ignition switch ACC)
ON Power supply position is “IGN” (Ignition switch ON with engine
stopped)
ENGINE RUN Power supply posi
tion is “RUN” (Ignition switch ON with engine
running)
CRANKING Power supply position is “CRANKING” (At engine cranking)
IGN Counter 0 - 39 The number of times that ignition switch is turned ON after DTC is detected
 The number is 0 when a malfunction is detected now.
 The number increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition
whenever ignition switch OFF → ON.
 The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.
Revision: 2010 May2011 QX56