Inspection Procedure
WARNING: This page is about a different car, the 2003 Lexus GS 430, 2003 Lexus GS 300, 2002 Lexus GS 430, and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
For circuit wiring diagram, see Fig 1.
Check for short to power, short to ground and continuity in the wiring harness and connectors between the master switch and body ECU No. 1, and door lock switch of passenger door and body ECU No. 1. If the results are OK, inspect the power window master switch circuit. See POWER WINDOW MASTER SWITCH CIRCUIT (DRIVER) under CIRCUIT TESTS under POWER WINDOWS in WINDOWS. If the results are not OK, repair or replace the wiring harness or connector.