2004 antenna mast operates randomly, stereo mode switches too

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Dec 29, 2012
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Hey All,

My 2004 with navi has been mostly awesome so far, but this past week the radio started to malfunction. The antenna retracts and extends randomly whether the stereo is on or not. When listening to radio, the radio retunes from say, 101.3 to 101.5, or very rarely 101.1. Also occasionally, the mode of the stereo changes randomly to cd, tape or dvd while listening to the radio. Wife's DD - always has the weird problems, go figure :rolleyes:. Just ticked past 100k in case anyone is keeping score.

I suspect the root of the problem is in the antenna mast ecu. I suspect this because the antenna extends and retracts on its own whether the stereo is on, off or in any other mode (tape, dvd, etc.).

Anyway, searched the web and ih8mud in particular, found nothing significant so far. Anybody had a similar issue? Anybody else had gremlins traced back to antenna mast ecu? If so please let me know. I am half tempted to go after the ECU and maybe relay (the relay switch sounds loud, but behaves properly as near as I can tell, but...) while I'm at it just to see. Any hints?

Thanks,

454freak
 
Hey All,

My 2004 with navi has been mostly awesome so far, but this past week the radio started to malfunction. The antenna retracts and extends randomly whether the stereo is on or not. When listening to radio, the radio retunes from say, 101.3 to 101.5, or very rarely 101.1. Also occasionally, the mode of the stereo changes randomly to cd, tape or dvd while listening to the radio. Wife's DD - always has the weird problems, go figure :rolleyes:. Just ticked past 100k in case anyone is keeping score.

I suspect the root of the problem is in the antenna mast ecu. I suspect this because the antenna extends and retracts on its own whether the stereo is on, off or in any other mode (tape, dvd, etc.).

Anyway, searched the web and ih8mud in particular, found nothing significant so far. Anybody had a similar issue? Anybody else had gremlins traced back to antenna mast ecu? If so please let me know. I am half tempted to go after the ECU and maybe relay (the relay switch sounds loud, but behaves properly as near as I can tell, but...) while I'm at it just to see. Any hints?

Thanks,

454freak
Did you ever find out what was causing this issue? I'm having a similar issue now with my 2001 LX470 (w/ nav + ML sound). Radio randomly down-scrolls through stations (same thing with tracks on CDs) and occasionally the input sources will randomly change as well. I haven't noticed issues with the antenna mast retracting, but my mast is broken (but still connected) at the top-most joint, so I usually keep it mostly retracted to a low height.

Before I start ripping up the dash, I'd love to get any insight that you or others might have on the issue. The only responses I've seen to similar posts on other sites accuse the driver of inadvertently mashing the sound buttons on their steering wheel, but I don't have any audio controls on my steering wheel, so that's obviously not the issue.

Thanks to anyone that can offer their input.
 

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