Body Control System Operation

Each of the three body control modules integrate a number of functional systems under the control of a single module. Each of the modules is connected to the Class 2 serial data line; many control signals are implemented by Class 2 messages.

Dash Integration Module (DIM)
The DIM functions include the following:
^ Power moding control (ignition switch states) over Class 2 serial data line
^ Control of headlights, front foglights and exterior lamps
^ Interior lamps incandescent dimming
^ Steering wheel controls
^ Horn relay control for theft activation
^ Lamps On signal with wiper/washer
^ Low side temperature for HVAC compressor
^ Hood ajar switch input (export)

Instrument Panel Integration Module (IPM)
The IPM functions include the following:
^ Front HVAC air delivery and temperature controls
^ Ambient light sensor input and twilight delay input for headlights control
^ Foglight switch inputs
^ I/P dimmer switch input
^ Traction control switch input
^ Interior lamps switch input
^ Key in ignition switch input from the ignition switch
^ Fuel door and rear compartment lid release switch input
^ Ignition switch Headlight control

Rear Integration Module (RIM)
The RIM functions include the following:
^ Fuel level sensor input
^ Heated seat controls
^ HVAC blower control
^ Rear defogger control
^ Park brake relay controls
^ Various controls for the interior lamps
^ Reverse control for the backup lamps and automatic day/night mirror
^ Rear fog lights control
^ Fuel door and rear compartment lid release controls
^ Retained Accessory Power (RAP) control for the sunroof control module
^ Ajar switch and tamper switch inputs from the rear compartment lid Content theft alarm