The body control system consists of the following 3 modules:
| • | The dash integration module (DIM) |
| • | The instrument panel integration module (IPM) |
| • | The rear integration module (RIM) |
Each of the 3 body control modules integrate a number of functional systems under the control of a single module. Each of the modules are connected to the Class 2 serial data line; many control signals are implemented by Class 2 messages.
Dash Integration Module (DIM)
The DIM is wired to the class 2 serial data line. The various DIM input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
| • | Control of headlights and exterior lamps |
| • | Interior lamps incandescent dimming |
| • | Lamps On signal with wiper/washer |
| • | Power moding control over Class 2 serial data line |
| • | Steering wheel controls |
| • | Storage of the clock settings and, sending a message out on the class 2 serial data circuit in response to requests from other modules |
Instrument Panel Integration Module (IPM)
The IPM is wired to the class 2 serial data line. The various IPM input and output circuits are described in the corresponding functional areas as indicated on the IPM electrical schematics.
The IPM functions include the following:
| • | The ambient light sensor input and twilight delay input for headlamp control. |
| • | The front HVAC air delivery and temperature control. |
| • | The IP dimmer switch input. |
| • | The ignition switch headlamp control. |
| • | The interior lamps switch input. |
| • | The key-in-ignition switch input from the ignition switch. |
| • | The rear compartment lid release switch input. |
| • | The traction control switch input. |
Rear Integration Module (RIM)
The RIM is wired to the class 2 serial data line. The various RIM input and output circuits are described in the corresponding functional areas as indicated on the RIM electrical schematics.
The RIM functions include the following:
| • | The ajar switch and tamper switch inputs from the rear compartment lid |
| • | The automatic level control |
| • | The cigar lighter relay control |
| • | The fuel door lock and release control |
| • | The heated seat controls |
| • | The park brake relay control |
| • | The rear compartment lid release controls |
| • | The rear defogger relay control |
| • | The retained accessory power (RAP) relay control |
| • | The reverse lamp relay control |
| • | The various controls for the interior lamps |
Power Mode Master
This vehicles DIM functions as the Power Mode Master (PMM). Refer to
Power Mode Description and Operation
for a complete description of power mode functions.
