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 functions:
^ Power moding control (ignition switch states) over Class 2 serial data line
^ Control of headlights 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
^ Cooling fan control (power - train cooling)
^ Incandescent dimming of dash bulbs control
^ Real time clock time keeper
^ Battery voltage sense and load management
^ Reverse lockout solenoid control

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

Rear Integration Module (RIM)
The RIM functions include the following functions:
^ Heated seat controls
^ Rear defogger control
^ Park relay controls
^ Various controls for the interior lamps
^ Reverse control for the backup lamps
^ Rear compartment lid release controls
^ Retained Accessory Power (RAP) control
^ Ajar switch and tamper switch inputs from the rear compartment lid
^ Vehicle leveling