Circuit Description
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The automatic level control (ALC) sensor provides a signal voltage between 0.3-4.7 volts to its internal module. This signal voltage represents the wheel's position relative to the body. The ALC module is internal to the ALC sensor, and no external circuits are involved.