Remote Up / Down Function does not Operate: 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.
When the engine switch is on (IG) and the window lock switch is set to UNLOCK, the multiplex network master switch sends remote signals to the multiplex network door ECUs, and the remote signals are sent to the power window regulator motors via the multiplex network switches, but the window lock switch is set to LOCK, the master switch sends window lock signals directly to each multiplex network switch.