2004 Lexus ES 330 Rear Power Windows are Inoperative

2004 LEXUS ES 330
39,900 MILES • 6 CYL • FWD • AUTOMATIC
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HAUPT
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Both of my rear windows do not operate up or down from either the control at the specific door or the drivers master panel. Both windows "went out" at the same time. I've checked the fuses for both and they are fine. The service tech at my local dealer suggested they needed to be "reset." To reset the window I was told to simply hold the control button at the door in the down position for several seconds. This, of course, did nothing. The car has not had a battery change or any disruption in power supply. I can't fathom that both window motors went out at the exact same time. It is as though I'm not getting any power to either motor. Everything else works fine. Any help or ideas would be great.
Feb 9, 2009 at 1:44 PM
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KHLOW2008
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Hi haupt,

Thank you for the doantion.

The power windows uses large-scale body multiplex conmmunications and for diagnostics, a scanner is required.

However the symptoms described are most likely to be caused by a faulty Driver Master switch assy. You would need to do diagnostics to verify the cause.
Feb 9, 2009 at 3:09 PM
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HAUPT
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So, this "reset" statement by the service tech at Lexus was bogus? Are there any other fuses that may also affect the windows?
Feb 9, 2009 at 4:01 PM
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KHLOW2008
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Not to say they are bogus. The reset would be required if the windows operates erratically and in your case it is not working so does not apply. There are quite a number of fuses that might affect the system and I have the schematic here for you to check through.


https://www.2carpros.com/forum/automotive_pictures/192750_PWindow04LexusE330a1_1.jpg


https://www.2carpros.com/forum/automotive_pictures/192750_PWindow04LexusE330a2_1.jpg

If the fuses are ok, then you would have to get onto a diagnostic to find the cause.
Feb 10, 2009 at 5:51 PM
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LEXUSHELPER
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Press the window down switch on the Master Switch for the rear window and slamp the rear door hard or have someone tap on the window motor. This will cause the window motor to run again. Then you need to perform a updated TSB on the window run. Or else the window will get stuck again.
Feb 23, 2009 at 11:43 PM
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STRAILER
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Here is the bulletin (TSB). Check out the images (below). Please let us know what happens.
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Jan 11, 2023 at 11:57 AM