Infiniti QX56 (JA60). Manual - part 620

INL-8

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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. 

ILLUMINATION CONTROL SYSTEM

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ILLUMINATION CONTROL SYSTEM

System Diagram

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System Description

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The illumination lamps operation is dependent upon the position 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 module) 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 switch) 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 control, the illumination lamps illuminate again.

Component Parts Location

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AWLIA1754GB

AWLIA0398ZZ

INL-10

< FUNCTION DIAGNOSIS >

ILLUMINATION CONTROL SYSTEM

Component Description

INFOID:0000000005358670

1.

BCM M18, M20 (view with instrument 
lower panel LH removed)

2.

IPDM E/R E122, E123, E124

3.

Combination switch (lighting and turn 
signal switch) M28

4.

Combination meter (illumination con-
trol switch) M23, M24

Part name

Description

BCM

The BCM monitors the lighting switch position with the combina-
tion switch reading function.  The BCM requests, via CAN com-
munication, that the IPDM E/R activate the tail lamp relay. 

IPDM E/R

The IPDM E/R activates the tail lamp relay based on inputs re-
ceived from the BCM via the CAN communication network. 

Combination meter (illumination control switch)

The illumination control switch is a part of the combination meter.  
The combination meter controls illumination intensity by varying 
ground to the illumination lamps based on the illumination control 
switch position. 

Combination switch (lighting and turn signal switch)

The combination switch provides input to the BCM about the light-
ing switch position. 

DIAGNOSIS SYSTEM (BCM)

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DIAGNOSIS SYSTEM (BCM)

COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)

INFOID:0000000005356686

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.

INT LAMP

Diagnosis mode

Function Description

WORK SUPPORT

Changes the setting for each system function.

SELF-DIAG RESULTS

Displays the diagnosis results judged by BCM. Refer to 

BCS-54, "DTC Index"

.

CAN DIAG SUPPORT MNTR

Monitors the reception status of CAN communication viewed from BCM.

DATA MONITOR

The BCM input/output signals are displayed.

ACTIVE TEST

The signals used to activate each device are forcibly supplied from BCM.

ECU IDENTIFICATION

The BCM part number is displayed.

CONFIGURATION

• Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

WORK SUPPORT

DATA MONITOR

ACTIVE TEST

BCM

BCM

×

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps FLASHER

×

×

Air conditioner

AIR CONDITONER

×

Intelligent Key system

INTELLIGENT KEY

×

Combination switch

COMB SW

×

Immobilizer

IMMU

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door open

TRUNK

×

×

RAP (retained accessory power)

RETAINED PWR

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS (tire pressure monitoring sys-
tem)

AIR PRESSURE MONITOR 

×

×

×

Vehicle security system

THEFT ALM

×

×

×

Panic alarm system

PANIC ALARM

×