July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
DTC U0215: P/W SW (DR) LIN timeout: Notes
WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Before replacing the ECU, ensure that the communication circuit is normal.
Fig 1: Power Window Main Switch LIN Communication Circuit Diagram