Body Control Systems: Description and Operation

Module Controlled Functions

Lighting Control Module (LCM)

The Lighting Control Module (LCM) is located under the instrument panel to the right of the steering column and has control of the following systems:

- Interior lighting
- Exterior lighting
- Dimmable backlighting
- Battery saver function
- Horn
- Brake shift interlock
- Perimeter alarm
- Passive Anti-Theft System (PATS)

Refer to the appropriate information for system specific information and diagnostics.

Rear Audio and Temperature Control (RATC) Module

The RATC module is located behind the rear seat backrest. It monitors the inputs from the rear audio/climate control switch and provides information over the communication network to the Audio Control Module (ACM) and the HVAC Module for the rear seat audio and climate controls.