Persistent Radio/display issue - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 2 (permalink) Old 10-19-2018, 06:32 PM Thread Starter
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Persistent Radio/display issue

So I'm currently deployed, but have been trying to troubleshoot a persistent radio/center display issue on my wife's 2007 6S. Back in July, she went on a road trip during which the radio stopped working. After a little troubleshooting, she found the ROOM fuse had blown so she replaced it. Radio worked for a few weeks, then went out again. She checked the fuse again, but this time it wasn't blown. However, when she reinstalled it, the radio worked again for a few more weeks. It went out again, but this time replacing the fuse didn't make any difference. Fast forward to early September and the battery died. She had the battery replaced, and low and behold, everything worked again for a few weeks before going out again. About mid September, the idle started acting funky, so I had her install the spare throttle body I had sitting on the workbench. As part of the process she disconnected the battery and then did the idle relearn process for the new throttle body. Again the radio worked for about a week. As expected however, the spare, used throttle body was a bit of a dud, seems the idle relearn process didn't take so I had her install a new throttle body from Mazda. This time the idle relearn did work, it's running great, stereo works, all is well with the world. But, once again, 2 days later, the radio is dead again. It seems she can make it work by disconnecting and reconnecting the battery but it won't work for long. I'm a few months away from being home to tear it apart to see what could be wrong, but I was wondering if the community might have an answer to why the radio/display only seems to work after a battery disconnect/reset and what she can try next.



I offered to get her an aftermarket double din with the adapter, but she really likes the factory radio after I installed a USB adapter for her music.



Notes:
ROOM Fuse is good
12.5V at the ROOM fuse contacts
Dome lights, instruments, dash cluster, cig lighter all work fine.
Moonet USB/Aux adapter installed in factory non-Bose Stereo



TLDR: Radio goes out, only works once the battery is disconnected and reconnected.


Thanks,
George

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post #2 of 2 (permalink) Old 10-20-2018, 03:49 AM
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All I can think of is a chassis ground issue. It's a bit of a bigger job (don't forget the bolt from the glove box) but I would remove the AUX adapter and see if the issue resolves. I recently had a remote door lock issue as a result of adding a cheap LED light to the system. It would work sometimes but not others. Just a thought. It's great your gal can do the work herself. Maybe someone else can give some insight.


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