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Old 07-23-2023, 03:51 PM #1
louxwe louxwe is offline
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Electric problem: interior lights, alarm fob, locks not working 14 sec after shutoff

Wondering if anyone can help me out.

I recently tried to use my fob to lock/unlock my doors, but it didn't work... I then later noticed that my interior lights/dome/door, would stop working shortly after I turned the key off, same with garage door opener.

So now after I turn the key to the off position, exactly 14 seconds later, the interior/dome/door lights, garage door opener, and the locks/alarm from the fob all cut off and stop working. Put the key back in and turn to on position and everything back to working normally. Key fob is fine, changed the battery, I can turn car off and close the door and have 14 seconds to lock with key fob but when I come back it won't work and have to use key to open driver door, locks wont work until I put key in and turn on. Somehow 14 seconds after I switch to off position they stop working.

I do have a hunch that this has something to do with a large bit of rain that fell as it seems to have started after that rain. Also sometimes during a heavy rain I will get water leaking in from the top roof middle front by where the offroad controls/dial, garage opener, lights are ... I have had drips from there for years but no issues. But this last time it was a huge rain storm, had had a small bit of water on drivers side floor.

Any thoughts on what the problem is or how to troubleshoot. Other than that everything else is running fine.

Thanks, Bill
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Old 07-23-2023, 04:38 PM #2
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I would start with fixing the water leak...

Then you can address all of the electronics that have been damaged due to that water leak you let continue for years.

Don't treat the symptom, treat the cause.
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Old 07-23-2023, 04:48 PM #3
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Thanks that was helpful
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Old 07-23-2023, 04:50 PM #4
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Water leak could be due to clogged sunroof drains. As I remember from previous threads the drain lines run from the roof down to the driver and passenger sides foot well in front and down by the rear doors in back.
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Old 07-23-2023, 04:56 PM #5
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Quote:
Originally Posted by louxwe View Post
Thanks that was helpful
If you are asking how to stop the leak there are several threads on the most likely causes. I would start with; 1. Sunroof drains, 2. Roof Rail seals.
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Old 07-23-2023, 05:14 PM #6
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No I am not asking how to fix the leak. I am asking how to fix the electrical problem that I described.
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Old 07-24-2023, 07:39 AM #7
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Quote:
Originally Posted by louxwe View Post
No I am not asking how to fix the leak. I am asking how to fix the electrical problem that I described.
once its turned off the power should cut off to all electronics. I have never timed it but yes it cuts off as designed. As for the key FOB replace the battery if not working.
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Old 10-08-2023, 08:46 PM #8
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MPX Body

The problem is with a damaged MPX Body computer. I was able to figure it out based on a thread in a different forum. You can see the brown spot in the bottom left corner. Car still drives fine just can't use the key fob 10-15 seconds after I turn it off. Problem is I can't find a replacement part, it is listed as 89221-35112. I find many similar ones but not one that is the right part. Anyone know were to find the MPX body computer for a 2013 4Runner Trail?
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