Rear Power Window LH Auto Up / Down Function 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.

If the pulse sensor on the rear power window regulator motor assembly (for rear LH side) malfunctions, the regulator will enter fail-safe mode, and the AUTO UP/DOWN function will not operate.
If the power window initialization (See CUSTOMIZE PARAMETERS ) has not been performed, the AUTO UP/DOWN function will not operate.