System Description

System Description <With light & rain sensor>

SYSTEM DIAGRAM

Component		Function
Light & rain sensor		Refer to LIGHT AND RAIN SENSOR.
IPDM E/R		Controls the integrated smart FET, and supplies voltage to the load according with the request from BCM via CAN communication. Transmits the control signal and request (via LIN communication) to the load according with the request from BCM via CAN communication.
BCM		Detects each switch condition by the combination switch reading function. Exterior light ON/OFF is judged from each signal, and then a request is transmitted to IPDM E/R (via CAN communication) to controls the each lights. It also transmits a status to the combination meter (via CAN communication) to turns indicator light ON/OFF.
Combination meter		Turns the indicator light ON/OFF according to the status from BCM via CAN communication.
Combination switch	Lighting & turn signal switch	Inputs the each switch condition signal to BCM.

OUTLINE

Intelligent auto light system is controlled by each function of BCM and IPDM E/R.
Control by BCM
- Combination switch reading function
- Auto light function
Control by IPDM E/R
- Smart FET control function
Intelligent auto light system has the auto light function.
- Auto light function automatically turns ON/OFF the exterior lights*, depending on the outside brightness.

*: Headlight (LO/HI), front fog light, parking light, license plate light and tail light.

note	Headlight (HI) depend on the combination switch condition. Front fog light does not turn ON automatically, but automatically turns OFF.

AUTO LIGHT FUNCTION

BCM detects the combination switch condition with the combination switch reading function.
BCM receives exterior light ON/OFF requests from the light & rain sensor by LIN communication line.
BCM judges the ON/OFF status of the exterior light according to ON/OFF requests from light & rain sensor and the vehicle condition.
BCM transmits each request signal to IPDM E/R and each status signal to combination meter via CAN communication, according to ON/OFF condition by the auto light function.