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) module provides 5 volts to the position sensor. The ALC sensor also monitors this voltage supply for a fault condition which prevents proper regulation. The control module is internal to the ALC sensor. No external circuits are involved.