System Description

SYSTEM DIAGRAM

Component	Function
Door switch	Detects the door condition (open or close), and inputs the door switch signal to BCM.
Door lock and unlock switch	Transmits the door lock and unlock switch signal to BCM from door lock and unlock switch operation.
Keyless operation key	Transmits the door lock/unlock signal to Keyless operation key unit from door lock/unlock button operation.
Door request switch	Detects the door lock/unlock operation from outside of the vehicle, and transmits the door request switch signal to Keyless operation key unit.
BCM	Controls the interior room light relay, and turns the each interior room light ON/OFF.
Keyless operation key unit	Transmits the door lock/unlock request signal to BCM (via CAN communication).
Interior room light relay	Interior room light relay supplies power supply voltage to each interior room light according to the control signal from BCM.
Map light	Refer to Interior Light Appearance and Bulb SpecificationsInterior Lamp Appearance and Bulb Specifications.
Personal light
Room light
Mood light
Luggage room light
Vanity mirror light

OUTLINE

Interior room light battery saver is controlled by BCM.
BCM turns interior room lamps OFF depending on the vehicle condition. This function prevent battery discharge if the driver neglects, turning OFF any lamps.

INTERIOR ROOM LIGHT BATTERY SAVER FUNCTION

BCM turns interior room light relay ON and keeps the interior room light power supply continuously when the ignition switch position is ON.
When the ignition switch is turned OFF, BCM operates timer for 10 minutes and then turns interior room light relay OFF to cut the interior room light power supply.
note When the ignition switch is turned OFF and all doors are locked, BCM operates timer for 20 seconds and then turns interior room light relay OFF to cut the interior room light power supply.
BCM restart the timer when any of the following signal changes while operating the timer.
- Ignition switch status
- Door switch signal
- Door lock and unlock switch signal
- Driver lock/unlock signal
- Door lock/unlock request signal