Operation CHARM: Car repair manuals for everyone.

Modules

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
- Horn relay control
- 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