randysanders

Hello everyone, my 2012 A7 MMI recently gave out on me. It opens for about 3seconds with a black screen when I push the open/close button but then goes back into the dashboard. I checked my fuse and it was blown so I attempted to replace the fuse but as soon as I put the new fuse in, it immediately blew.
Has this happened to anyone else? Any idea what this could be? Any help is good help.

Thanks!

fkaufman

If the fuse blows immediately, you are dealing with a dead short. These would be my troubleshooting steps:

Take the fuse out.
Measure the voltage on both pins of the fuse socket. One pin should have 12V (or a little higher), this is the supply side.
Measure the resistance of the other pin to ground. It will be either 0 or a very low value.
Check the wiring diagram that shows what is connected to this pin.
Disconnect one by one whatever is connected to this pin to find which component has the short.
My first check would be to disconnect the MMI unit connector.

DWYS WYSD

Could anyone give me more details on removing the MMI unit how do I take off the plastic panels what kind of screws are holding the MMI unit in?