Infiniti QX56 (Z62). Manual - part 819

INL-6

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SYSTEM

SYSTEM

INTERIOR ROOM LAMP CONTROL SYSTEM

INTERIOR ROOM LAMP CONTROL SYSTEM : System Diagram

INFOID:0000000006216050

INTERIOR ROOM LAMP CONTROL SYSTEM : System Description

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OUTLINE

• Interior room lamps* are controlled by interior room lamp timer control function of BCM. 

*: Map lamp, foot lamp and personal lamp (when map lamp switch and personal lamp switch are in DOOR
position).

• Step lamp is controlled by step lamp control function of BCM.
• Luggage room lamp and automatic back door close switch illumination are controlled by luggage room lamp

control function of BCM.

• Puddle lamp is controlled by puddle lamp timer control function of BCM.
• Push-button ignition switch illumination is controlled by the push-button ignition switch illumination control

function of BCM and combination meter.

• Interior room lamps and puddle lamp are illuminated by welcome light function of Intelligent Key system.

Refer to 

DLK-26, "WELCOME LIGHT FUNCTION : System Description"

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INTERIOR ROOM LAMP TIMER CONTROL

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SYSTEM

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Interior Room Lamp Timer Basic Operation

NOTE:
A: Sets the interior room lamp gradual brightening and dimming time.
B: Gradually brightens from 0% to 100% and gradually dims from 100% to 0% in 1 second.
• The interior room lamp turns ON and OFF (gradual brightening and dimming) by the interior room lamp

timer.

• BCM judges the vehicle condition with the following items. It activates the interior room timer.
- Ignition switch status
- Door switch signal (except back door)
- Door lock/unlock signal (remote keyless entry receiver, each door request switch, door key cylinder switch,

door lock/unlock switch)

NOTE:
Each function of interior room lamp timer can be set by CONSULT-III. Refer to 

INL-14, "INT LAMP : CON-

SULT-III Function (BCM - INT LAMP)"

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Interior Room Lamp ON Operation

• BCM always turns the interior room lamp ON when any door opens excepting back door.
• When all doors are closed, and any all door unlock operation is performed or ignition switch is turned OFF,

BCM brightens interior room lamp to 30% brightness and maintains 30% brightness until any door opens.

• BCM activates the interior room timer in any of the following conditions to turn the interior room lamp ON for

a period of time.

- Any door opens before all doors close excepting back door.
- Ignition switch is turned ON 

→

 OFF.

- Any door unlock signal is detected when all doors close excepting back door with ignition switch OFF. 
NOTE:
The timer restarts if new condition is input during the timer operating time.

Interior Room Lamp OFF Operation

BCM stops the timer and turns interior room lamp OFF, when any of the following conditions is satisfied.
• The interior room lamp timer operating time is expired with all doors closed excepting back door.
• Ignition switch position is other than OFF with all doors close excepting back door.
• Any door lock signal is detected with all doors close excepting back door.

LUGGAGE ROOM LAMP CONTROL

BCM controls the luggage room lamp and automatic back door close switch illumination (ground-side) to turn
ON with back door switch ON.
• When luggage room lamp switch is turned to the ON position, luggage room lamp turns ON.
• When luggage room lamp switch is in the DOOR position and back door is opened, luggage room lamp

turns ON.

• When back door is opened, automatic back door close switch illumination turn ON.

STEP LAMP CONTROL

BCM controls the step lamp (ground-side) to turn ON with any door switch ON excepting back door.

PUDDLE LAMP TIMER CONTROL

Puddle Lamp Timer Basic Operation

• BCM controls the ground to turn the puddle lamp ON.

JMLIA0961GB

INL-8

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SYSTEM

• The puddle lamp turns ON and OFF by the puddle lamp timer.
• BCM judges the vehicle condition with the following items. It activates the puddle lamp timer.
- Ignition switch status
- Door switch signal (except back door)
- Door lock/unlock signal (remote keyless entry receiver, each door request switch)
- Driver side door lock status

Puddle Lamp ON Operation

BCM activates the puddle lamp timer in any of the following conditions to turn the puddle lamp ON for a period
of time.
• Any door opens excepting back door.
• Any door opens before all doors close excepting back door.
• Ignition switch is turned ON 

→

 OFF.

• Door unlock signal by remote keyless entry receiver or each door request switch is detected. 
• Driver side door is locked*. 
NOTE:
The timer restarts if new condition is input during the timer operating time.

Puddle Lamp OFF Operation

BCM stops the timer and turns puddle lamp OFF, when any of the following conditions are satisfied.
• The puddle lamp timer operating time is expired.
• The interior room lamp OFF conditions.
• The interior room lamp timer operating time is expired.

PUSH-BUTTON IGNITION SWITCH ILLUMINATION CONTROL

Push-button Ignition Switch Illumination Basic Operation

• BCM controls the ON/OFF status of push-button ignition switch illumination according to vehicle status.
• BCM provides the push-button ignition switch illumination control signal and the ground to turn the push-but-

ton ignition switch illumination ON.

• BCM cuts the ground supply while each illumination (tail lamp) is ON. BCM switches to the ground control

according to the meter illumination control function. Refer to 

MWI-16, "METER ILLUMINATION CONTROL :

System Description"

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Heart Beat Operation

BCM repeats brightening and dimming operation of push-button ignition switch illumination when any of the
following conditions are satisfied.
• Welcome light function operates.
• When ignition switch is OFF and any of the following conditions are satisfied.
- Driver side door changes from closed to open
- Driver side door changes from locked to unlocked
- Intelligent Key ID comparison is OK and driver side door changes from open to closed
- ID comparison by Intelligent Key transponder is OK

Illumination ON Operation

When ignition switch is not OFF or tail lamp turns ON, push-button ignition switch illumination turns ON.

Dimming Operation

When tail lamp turns OFF and ignition switch is turned OFF, push-button ignition switch illumination dims to
50% brightness.

Illumination OFF Operation

Push-button ignition switch illumination turns OFF when ignition switch turns OFF and tail lamp turns from ON
to OFF, while push-button ignition switch illumination is in ON status.
When push-button ignition switch illumination is at 50% brightness or in heartbeat status, and any of the fol-
lowing conditions are satisfied, push-button ignition switch illumination turns OFF.
• 15 seconds after start of heartbeat operation.
• When welcome light function is not operating and any on the following conditions is satisfied.
- Driver side door is closed
- Driver side door is locked
- Intelligent Key ID comparison is NG
- Comparison of Intelligent Key ID by transponder is NG

INTERIOR ROOM LAMP BATTERY SAVER SYSTEM

SYSTEM

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INTERIOR ROOM LAMP BATTERY SAVER SYSTEM : System Diagram

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INTERIOR ROOM LAMP BATTERY SAVER SYSTEM : System Description

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OUTLINE

• Interior room lamp battery saver is controlled by BCM.
• BCM turns applicable lamps OFF depending on the vehicle condition. This function prevents the battery

from over-discharging if the driver neglects turning OFF the any lamps.

Applicable lamps

• Map lamp
• Personal lamp
• Foot lamp
• Luggage room lamp
• Automatic back door close switch illumination
• Step lamp
• Puddle lamp
• Vanity mirror lamp

INTERIOR ROOM LAMP BATTERY SAVER FUNCTION

• When the ignition switch is turned to a position other than ON, BCM operates the timer for a period of time to

cut the interior room lamp power supply.

• BCM restart the timer when any of the following signals changes while operating the timer.
- Push-button ignition switch status
- Door switch signal (ALL)
- Door lock/unlock signal (remote keyless entry receiver, each door request switch, door lock and unlock

switch, door key cylinder switch)

• BCM provides the interior room lamp power supply continuously when the ignition switch position is ON.
• When welcome light function operates.
NOTE:

JMLIA1189GB