Rear Power Window LH does not Operate with Rear Power Window Switch LH: Description
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
When the engine is running or the engine switch is on (IG) and window lock switch is OFF, the rear power window regulator motor assembly (for rear LH side) is operated by the multiplex network switch assembly (for rear LH side) The rear power window regulator motor assembly (for rear LH side) has motor, regulator, and sensor functions