Circuit/System Description

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The sunroof motor/actuator is located between the headliner and the roof structure, while the sunroof switch is located above the rearview mirror. Battery positive voltage is supplied to the sunroof motor/actuator from the SUNROOF MOD fuse located in the right rear fuse block. Ignition voltage is applied to the sunroof motor/actuator from the body control module (BCM) with the ignition in the RUN or ACC positions. The sunroof motor/actuator supplies voltage to the sunroof switch through the sunroof switch open and close signal circuits. Ground is supplied to the sunroof switch from the switch ground circuit and G401. When the roof open or closed switch is pressed, ground is applied through the switch contacts and the appropriate signal circuit to the sunroof motor/actuator. The motor/actuator then internally applies battery voltage and ground to the appropriate circuits of the reversible sunroof motor in order to move the roof glass panel to the open or closed positions.

The sunshade motor/actuator contains the logic for opening and closing the sunshade based on Serial Data from the sunroof motor/actuator. The sunshade motor/actuator internally applies battery voltage and ground to the appropriate circuits of the reversible sunshade motor in order to move the sunshade panel to the open or closed positions.