Suspension Control Module: Description and Operation

A microcontroller-based electronic module controls the air compressor motor (through an electromechanical relay), all system solenoids, and the damper motors mounted in each shock. The module also provides power to front and rear height sensors. The ARC module controls damping and vehicle height adjustments by monitoring, two height sensors, vehicle speed, a steering sensor, acceleration input, the door ajar signal, two transfer case signals, the brake switch, and individual damper feedback signals. The module also conducts all failsafe and diagnostic strategies and contains self test and communication software for testing of the vehicle and module.

The control module is mounted in the passenger compartment inside the instrument panel behind the radio and temperature controls.

The ARC control module monitors and controls the ARC system through a 32-pin two-way connector. It is keyed so that the ARC control module cannot be plugged into an incorrect harness. There are two sides of the harness connection to the module. Each is uniquely colored and keyed to prevent reversal of connections.