System Description

SYSTEM


EXTERIOR LAMP BATTERY SAVER SYSTEM : System Description


OUTLINE
- Exterior lamp battery saver system is controlled by each function of BCM and IPDM E/R.

Control by BCM
- Combination switch reading function
- Headlamp control function
- Exterior lamp battery saver function

Control by IPDM E/R
- Relay control function
- BCM turns the exterior lamp* OFF after a period of time to prevent the battery from over-discharge when the ignition switch is turned OFF with the exterior lamp ON.
*: Headlamp (LO/HI), parking lamp, tail lamp, license plate lamp, side marker lamp and front fog lamp.

NOTE:
When the lighting switch is turned AUTO, the exterior lamp battery saver switches to the auto light system. System Diagram.

EXTERIOR LAMP BATTERY SAVER ACTIVATION
BCM activates the timer and turns the exterior lamp OFF 5 minutes after the ignition switch is turned from ON
to OFF with the exterior lamps ON.

NOTE:
- Headlamp control function turns the exterior lamps ON normally when the ignition switch is turned ACC or the engine started (both before and after the exterior lamp battery saver is turned OFF).
- The timer starts at the time that the lighting switch is turned from OFF to 1ST or 2ND with the exterior lamp
OFF.