Part | Description
BCM |

- Detects each switch condition by the combination switch reading function.
- Judges the illumination lamp ON/OFF status depending on the vehicle condition. And then it transmits position light request signal to IPDM E/R and combination meter (with CAN communication).

IPDM E/R | Controls the integrated relay according to the request from BCM (with CAN communication).
Combination meter |

- Enters in nighttime mode according to the request from BCM (with CAN communication).
- Controls the each illumination in the nighttime mode.
  Refer to System Diagram.

Combination switch (Lighting and turn signal switch) | Refer to System Diagram.