Sliding Roof ECU Power Source Circuit: Description
WARNING: This page is about a different car, the 2006 Lexus GS 430 and 2006 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
The sliding roof ECU receives signals from the sliding roof switch and activates the sliding roof. However, fuse, wire harness or sliding roof ECU malfunctions may cause the sliding roof system to stop operating.