Part | Description
BCM |

- Detects each switch condition with the combination switch reading function.
- Judges each lamps ON/OFF condition according to the vehicle condition.

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

IPDM E/R | Controls the relay and supplies voltage to the load according to the request from BCM (with CAN communication).
Daytime running light relay | Switches headlamp (HI) circuit to illuminate the daytime running light.
Combination switch (Lighting & turn signal switch) | Refer to System Diagram.
ECM | Transmits the engine status signal to BCM (with CAN communication).
Combination meter | Transmits the parking brake switch signal to BCM (with CAN communication).