July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Auto Up/Down Function Does Not Operate At Rear LH: Wiring Diagram
WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Auto Up/Down Function Does Not Operate At Rear LH Wiring Diagram