Circuit/System Description
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
The sunroof control module determines the sunroof motor direction based on inputs received from the sunroof switch. The sunroof control module supplies each of the sunroof switch signal circuits with a 12 V reference. When the switch is pressed the signal circuit is pulled low signaling the roof open or close request. When the ignition switch is in the ON position or when retained accessory power (RAP) is active, voltage is applied to the sunroof control module via the RAP relay and the S/ROOF fuse. The sunroof control module controls the motor direction by changing the polarity of the applied voltage.