The body control module (BCM) controls a number of functional
systems. The BCM is connected to the Class 2 serial data line. Many
control signals are implemented by Class 2 messages.
The BCM functions include the following:
| • | Ajar switch and tamper switch inputs from the rear compartment
lid |
| • | Auxiliary chime control |
| • | Control of headlights and exterior lamps |
| • | Interior lamps incandescent dimming |
| • | Interior lamps switch input |
| • | Key-in-ignition switch input from the ignition switch |
| • | Low coolant sensor input |
| • | Power moding control (ignition switch states) over Class 2 serial
data line |
| • | Rear compartment lid release control |
| • | Retained accessory power (RAP) control |
| • | Seatbelt reminder/warning control |
| • | Steering wheel controls |
| • | Traction control switch input |
| • | Various controls for the interior lamps |
