2010 INFINITI QX56 ignition

INL-1
DRIVER CONTROLS
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SECTION INL
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CONTENTS
INTERIOR LIGHTING SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
FUNCTION DIAGNOSIS ...............................6
INTERIOR ROOM LAMP CONTROL SYSTEM
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6
System Diagram .................................................. ......6
System Description ...................................................6
Component Parts Location ........................................7
Component Description .............................................8
ILLUMINATION CONTROL SYSTEM .................9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ........................................9
Component Description ...........................................10
DIAGNOSIS SYSTEM (BCM) ............................11
COMMON ITEM ..................................................... ....11
COMMON ITEM : CONSULT-III Function (BCM -
COMMON ITEM) .....................................................
11
INT LAMP .............................................................. ....11
INT LAMP : CONSULT-III Function (BCM - INT
LAMP) .....................................................................
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BATTERY SAVER ................................................. ....13
BATTERY SAVER : CONSULT-III Function (BCM
- BATTERY SAVER) ...............................................
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COMPONENT DIAGNOSIS .........................15
POWER SUPPLY AND GROUND CIRCUIT .. ....15
BCM ....................................................................... ....15
BCM : Diagnosis Procedure ....................................15
BATTERY SAVER OUTPUT/POWER SUP-
PLY CIRCUIT ................................................. ....
17
Description ........................................................... ....17
Component Function Check ....................................17
Diagnosis Procedure ...............................................17
INTERIOR ROOM LAMP CONTROL CIRCUIT
...
19
Description ........................................................... ....19
Component Function Check ....................................19
Diagnosis Procedure ...............................................19
STEP LAMP CIRCUIT .......................................22
Description ........................................................... ....22
Component Function Check ....................................22
Diagnosis Procedure ...............................................22
CARGO LAMP CONTROL CIRCUIT ................24
Description ...............................................................24
Component Function Check ....................................24
Diagnosis Procedure ...............................................24
IGNITION KEYHOLE ILLUMINATION CON-
TROL CIRCUIT .................................................
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Description ...............................................................26
Component Function Check ....................................26
Diagnosis Procedure ...............................................26
INTERIOR ROOM LAMP CONTROL SYSTEM
...
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Wiring Diagram .................................................... ....28
ILLUMINATION .................................................44
Wiring Diagram ........................................................44
ECU DIAGNOSIS .........................................58
BCM (BODY CONTROL MODULE) .................58
Reference Value .................................................. ....58
Terminal Layout .......................................................61
Physical Values ................................................... ....61
Wiring Diagram ........................................................67
Fail Safe ..................................................................71
DTC Inspection Priority Chart ...............................72
Revision: April 20092010 QX56

INL-6
< FUNCTION DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL SYSTEM
FUNCTION DIAGNOSIS
INTERIOR ROOM LAMP CONTROL SYSTEM
System DiagramINFOID:0000000005146715
System DescriptionINFOID:0000000005146716
OUTLINE
• Interior room lamps* are controlled by the interior room lamp timer control function of the BCM.
*Front room/map lamps, personal lamp 2nd row, personal lamp 3rd row (when lamp switch is in DOOR posi-
tion) and puddle lamps.
• Cargo lamp is controlled by the cargo lamp control function of the BCM.
• Step lamps* are controlled by the step lamp control function of the BCM. *Front step lamps, rear step lamps and foot lamps.
The timer control functions of the BCM activate based on inputs from the remote keyless entry receiver, the
key cylinder lock/unlock switch, the door switc hes or the key switch and ignition knob switch.
ROOM LAMP TIMER OPERATION
When the interior room lamp switch is in the DOOR position and when all conditions below are met, the BCM
begins timer control (maximum 30 seconds) for interior room lamp ON/OFF.
• When the front door LH is unlocked [with Intelligent Key, main power window and door lock/unlock switch, or
front door lock assembly LH (key cylinder switch)].
• When a door opens → closes and the Intelligent Key is not inserted in the ignition switch.
Timer control is cancelled under the following conditions.
• When the front door LH is locked [with Intelligent Key, main power window and door lock/unlock switch, or
front door lock assembly LH (key cylinder switch)].
• A door is opened (door switch turns ON).
• Ignition switch is turned ON.
Interior lamp operational settings can be c hanged with the function setting of CONSULT-III.
AWLIA1595GB
Revision: April 20092010 QX56

INTERIOR ROOM LAMP CONTROL SYSTEMINL-7
< FUNCTION DIAGNOSIS >
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INTERIOR LAMP BATTERY SAVER CONTROL
If an interior lamp is left ON and does not turn OFF even when the doors are closed, the BCM turns off power
to the interior lamps automatically to save the batte ry 30 minutes after the ignition switch is turned OFF.
The BCM controls power and ground to all interior lamps.
After the battery saver system turns the la mps OFF, the lamps will illuminate again when
• a signal is received from an Intelligent Key or main power window and door lock/unlock switch, or when the
front door lock assembly LH (key cylinder switch) is locked or unlocked
• a door is opened or closed
• the Intelligent Key is removed from or inserted into the ignition switch.
The Interior lamp battery saver control time peri od can be changed with the function setting of CONSULT-III.
Component Parts LocationINFOID:0000000005146717
1. BCM M18, M19, M20 (view with instru-
ment lower panel LH removed) 2. Key switch and ignition knob switch
M12 3. Front door switch LH B8
Front door switch RH B108
4. Rear door switch LH B18 Rear door switch RH B116 5. Glass hatch ajar switch D707 6. Back door latch (door ajar switch)
D503
7. Front room/map lamp assembly R102 8. Vanity lamp LH R3 Vanity lamp RH R89. Door mirror (puddle lamp) LH D4
Door mirror (puddle lamp) RH D107
10. Ignition keyhole illumination M150 11. Foot lamp LH M99 Foot lamp RH M10012. Front step lamp LH D11
Front step lamp RH D109
AWLIA1062ZZ
Revision: April 20092010 QX56

INL-8
< FUNCTION DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL SYSTEM
Component Description
INFOID:0000000005146718
13. Rear step lamp LH D206 Rear step lamp RH D306 14. Cargo lamp B153 15. Personal lamp 3rd row R205
16. Personal lamp 2nd row R203
Part name Description
BCM Provides power and ground and controls timer functions for the
interior room lamps, step lamps and cargo lamp.
Key switch and ignition knob switch Provides key in ignition status to the BCM.
Door switches Provides door OPEN/CLOSED status to the BCM.
Glass hatch switch Provides glass hatch OPEN/CLOSED status to the BCM.
Back door latch Provides back door OPEN/CLOSED status to the BCM.
Power window and door lock/unlock switch RH Provides door lock/unlock position switch RH status to the BCM.
Main power window and door lock/unlock switch [front door lock
assembly LH (key cylinder switch)]. Provides door lock/unlock position switch LH status to the BCM.
Revision: April 20092010 QX56

ILLUMINATION CONTROL SYSTEMINL-9
< FUNCTION DIAGNOSIS >
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ILLUMINATION CONTROL SYSTEM
System DiagramINFOID:0000000005358668
System DescriptionINFOID:0000000005358669
The illumination lamps operation is dependent upon the posit ion of the combination switch (lighting and turn
signal switch). When the combination switch (lighting and turn signal switch) is placed in the 1ST or 2ND posi-
tion (or if the auto light system is activated) the BCM (body control modul e) receives input requesting the park-
ing lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module
engine room) via the CAN communication lines. The CPU (central processing unit) of the IPDM E/R controls
the tail lamp relay coil. When energized, this relay directs power to the parking and illumination lamps, which
then illuminate.
BATTERY SAVER CONTROL
When the combination switch (lighting and turn signal s witch) is in the 1ST or 2ND position and the ignition
switch is turned from ON or ACC to OFF, the battery saver control feature is activated. Under this condition,
the illumination lamps remain illuminated for 30 minutes unless the combination switch (lighting and turn signal
switch) position is changed. If the combination switch (lighting and turn signal switch) position is changed, then
the illumination lamps are turned off after a 30 second delay. When the combination switch (lighting and turn
signal switch) is turned from OFF to 1ST or 2ND position (or if auto light system is activated) after illumination
lamps have been turned off by the battery saver c ontrol, the illumination lamps illuminate again.
Component Parts LocationINFOID:0000000005146721
AWLIA1754GB
AWLIA0398ZZ
Revision: April 20092010 QX56

INL-12
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
INT LAMP : CONSULT-III Fu nction (BCM - INT LAMP)
INFOID:0000000005356687
WORK SUPPORT
* : Initial setting
DATA MONITOR
JPLIA0093GB
Work ItemSetting item Setting
SET I/L D-UNLCK INTCON ON* With the interior room lamp timer function
OFF Without the interior room lamp timer function
ROOM LAMP ON TIME SET MODE 1 0.5 sec.
Sets the interior room lamp gradual brightening time.
MODE 2* 1 sec.
MODE 3 2 sec.
MODE 4 3 sec.
MODE 5 4 sec.
MODE 6 5 sec.
MODE 7 0 sec.
ROOM LAMP OFF TIME SET MODE 1 0.5 sec.
Sets the interior room lamp gradual dimming time.
MODE 2 1 sec.
MODE 3 2 sec.
MODE 4* 3 sec.
MODE 5 4 sec.
MODE 6 5 sec.
MODE 7 0 sec.
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judges from IGN signal (ignition power supply)
KEY ON SW [ON/OFF] The switch status input from key switch
DOOR SW-DR [ON/OFF] The switch status input from front door switch LH
DOOR SW-AS [ON/OFF] The switch status input from front door switch RH
DOOR SW-RR [ON/OFF] The switch status input from rear door switch RH
DOOR SW- RL [ON/OFF] The switch status input from rear door switch LH
BACK DOOR SW [ON/OFF] The switch status input from back door switch
KEY CYL LK-SW [ON/OFF] Lock switch status input from door lock and unlock switch
KEY CYL UN-SW [ON/OFF] Lock switch status input from door lock and unlock switch
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (BCM)INL-13
< FUNCTION DIAGNOSIS >
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ACTIVE TEST
BATTERY SAVER
BATTERY SAVER : CONSULT-III Function (BCM - BATTERY SAVER)INFOID:0000000005356711
WORK SUPPORT
*: Initial setting
DATA MONITOR
CDL LOCK SW [ON/OFF] Lock switch status input from door lock and unlock switch
CDL UNLOCK SW [ON/OFF] Unlock switch status input from door lock and unlock switch
I-KEY LOCK [ON/OFF] Lock signal status received from Intelligent Key unit by CA N communication
I-KEY UNLOCK [ON/OFF] Unlock signal status received from Intelligen t Key unit by CAN communication
Monitor Item
[Unit] Description
Test Item
Operation Description
IGN ILLUM ON
Outputs the ignition keyhole illumination control signal to turn the ignition keyhole il-
lumination lamp ON.
OFF Stops the ignition keyhole illumination control signal to turn the ignition keyhole illu-
mination lamp OFF.
INT LAMP ON Outputs the interior room lamp control signal to turn the interior room lamps ON.
OFF Stops the interior room lamp control signal to turn the interior room lamps OFF.
STEP LAMP TEST ON Outputs the step lamp control signal to turn the step lamps ON.
OFF Stops the step lamp control signal to turn the step lamps OFF.
LUGGAGE LAMP TEST ON Outputs the luggage lamp control signal to turn the luggage lamp ON.
OFF Stops the luggage lamp control signal to turn the luggage lamp OFF.
Work Item Setting Item Setting
ROOM LAMP TIMER SET MODE 1* 30 min.
Sets the interior room lamp battery saver timer operating
time.
MODE 2 60 min.
MODE 3 10 min.
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judges from IGN signal (ignition power supply)
KEY ON SW [ON/OFF] The switch status input from key switch
DOOR SW-DR [ON/OFF] The switch status input from front door switch (driver side)
DOOR SW-AS [ON/OFF] The switch status input from front door switch (passenger side)
DOOR SW-RR [ON/OFF] The switch status input from rear door switch RH
DOOR SW- RL [ON/OFF] The switch status input from rear door switch LH
BACK DOOR SW [ON/OFF] The switch status input from back door switch
KEY CYL LK-SW [ON/OFF] Lock switch status input from door key cylinder switch
KEY CYL UN-SW [ON/OFF] Unlock switch status input from door key cylinder switch
CDL LOCK SW [ON/OFF] Lock switch status input from door lock and unlock switch
CDL UNLOCK SW [ON/OFF] Unlock switch status input from door lock and unlock switch
I-KEY LOCK [ON/OFF] Lock signal status received from Intelligent Key unit by CA N communication
I-KEY UNLOCK [ON/OFF] Unlock signal status received from Intelligen t Key unit by CAN communication
Revision: April 20092010 QX56

POWER SUPPLY AND GROUND CIRCUITINL-15
< COMPONENT DIAGNOSIS >
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COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis ProcedureINFOID:0000000005356487
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
ConnectorTe r m i n a l s
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON
or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch OFF Battery voltage
LIIA2415E
Revision: April 20092010 QX56