Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-IG1 and AM1 fuse.
CHECK:

Check continuity of ECU-IG1 and AM1 fuse.

OK:
1. Continuity
1. NG: Replace faulty fuse.
2. OK: Go to Next Step.
Check voltage between terminals BECU, SIG, BDR and GND of power window master switch connector.
PREPARATION:

Turn the ignition switch OFF.

CHECK:

Measure the voltage between terminals BECU, SIG, BDR and GND.

OK:
1. Voltage: 10 - 14V
1. OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).
2. NG: Go To Next Step
Check wire harness and connector between power window master switch and body ground (See PROCEDURE ).
1. NG: Repair or replace wire harness or connector.
2. OK: Proceed to next circuit inspection shown on problem symptoms table (See PROBLEM SYMPTOMS TABLE ).