Part | Description
BCM |

- Detects each switch condition by the combination switch reading function.
- Judges the exterior lamp OFF according to the vehicle condition.

- Requests each relay OFF to IPDM E/R (with CAN communication).

IPDM E/R | Controls the integrated relay according to the request from BCM (with CAN communication).
Combination switch (Lighting & turn signal switch) | Refer to System Diagram.