Circuit/System 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) adjusts the vehicle suspension ride height. The ASCM determines the height of the vehicle based on the voltage from the suspension position sensors. The module grounds the ELC COMP relay and the exhaust control solenoid to raise and lower the vehicle in order to keep the vehicle level.