What does the CPU do?
- Inputs
Door, right front
Door, others
Seat belt switch
Key reminder switch
Keyless antenna
Door lock switch
Speed sensor
Rear wiper/washer switch
- Outputs
Door warning lamp on instrument cluster
Interior Light
Rear wiper motor (hatch only)
Seatbelt warning lamp on instrument cluster
Ignition Key lamp
Door lock timer (central locking)
I believe their would be other uses but without different documentation I couldn't tell.