Circuit Description
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The air suspension control module (ASCM) controls the compressor relay and exhaust valve ground to maintain the height of the vehicle based on voltage signals from the rear height sensors. The ASCM raises and lowers the vehicle in order to keep the vehicle level.