Audi |

fix and maintain Audi, Honda, Toyota, VW, others
A8 D3 Audi MMI (Multi Media Interface) VCDS

MMI Dead, Screen Black, A8L D3

My Audi A8L MMI was dead, stuck at open, black screen, doesn’t close, every time I push a device button or reset the MMI, MMI initialize screen would come  on, and went black, while it was on, I could hear the relay clicking in the trunk under the back seat. 

VCDS scan would come up with: No communication with Head Unit, Optical Bus: open.

The culprit was the 5A yellow fuse was blown, I might have shorted the line somehow while working in the trunk. It did give me a great scare.

5A Fuse

fuse blown

Paid Links

8 Comment

  1. I tried to turn on the hidden menu so I could activate the graphical display for the parking sensors. After I did this I reset the MMI, and now it won’t turn back on. The fuse you describe here is good and VCDS can’t communicate with the controller.

    Not sure where to from here, I disconnected the battery to see if it just needed a reset.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.