MMI stopped working altogether. A6 Avant 2006.

[JonesyA6]

Apologies if this has been covered specifically but my MMI has died on my 2006 A6 Avant, having previously been drenched with water before I carried out a proper modification so it cannot happen again.
The MMI is completely dead, no illumination of controls, no screen, radio, nav or anything.
Fortunately I have VCDS and have run the Optical bus Diagnostic and it came back with the following:

Saturday,17,October,2015,13:35:55:61478
VCDS Version: Release 15.7.1 (x64)
Control Module Part Number: 4F0 910 468 A
Component and/or Version: Gateway H11 0070

Optical Bus Diagnostic : Standard

Controller Electrical Optical
19-CAN Gateway OK OK
07-Control Head(High/D3) OK OK
0E-Media Player 1 OK OK
77-Telephone OK OK
47-Sound System OK OK
56-Radio ERROR ERROR
37-Navigation OK ERROR

This may be a stupid question but does the amplifier contain the radio tuner or is that done separately, so when it says '56-Radio' does that not mean the actual amplifier itself. Could the ERROR on the navigation be connected to the fact that the Radio/Amplifier has a problem or is that unrelated?

Any thoughts much appreciated, I don't want to throw too much money at it to get it going again. By the way it has the standard Amplifier and not the Bose one.

EDIT: I've just realised that the radio tuner is actually underneath the amplifier, sorry! Presumably 'Sound System' means amplifier??

Many thanks.

[B5NUT]

Looks like the radio module is dead, so that will take out the MMI system, check the electrical connector & fuse, if that is OK then you need a new radio module.

[Nmaccann]

Hi
I have a similar problem.
2006 A6 C6 Allroad 4.2 V8 LHD. I live in France, but have the system in English.

A couple of months ago my MMI stopped working.
I had changed the pollen filter a day or so before.
My wife was out in the car and turned off the MMI.
I went out the next day and it wouldn't work.
Never worked since except about two weeks after it had initially stopped, I was sitting waiting in a parking space for my wife to return to the car and the MMI suddenly kicked into life. It stopped again after about 10-15 mins.
I checked the VCDS and ran a disgnostic.

Optical Bus Diagnostic : 3dB Attenuation

Controller Electrical Optical
19-CAN Gateway OK OK
07-Control Head(High/D3) OK OK
0E-Media Player 1 OK OK
47-Sound System OK ERROR
56-Radio OK OK
37-Navigation OK OK

This leads me to believe it is a bad optical connection, on the Sound System, that briefly aligned (giving me that 10-15 mins of MMI) and I don't know where to look.
I have an optical loop that I have tried onto the male optical cable in the back of the CD changer, but to no avail.
One question relating to this. When i do this (plug the MOST Male into a female loop), do I also have to put a male loop into the back of the CD changer so each fibre signal is looped and no open ends? I only did it with the incoming fibre. Maybe I do.
I don't need the CD changer.

Given the work I had done in changing the pollen filter which is behind the centre console, accessed from the footwell behind the glovebox, it is most likely that I may have dislodged or slightly knocked an optical cable on the "sound system" but I don't know where to look for this.
Anyone with good directions to where to look or photos if possible???.. it would be greatly appreciated as I am without sound, Sat Nav, reversing camera, etc. ever since. Also means no access to suspension adjustment, towing mode, jacking mode, etc.
I also tried changing the card for the control panel in the centre console but this made no difference so I put the original card back in after cleaning the connections and everything around it for dust.

Unrelated but may avoid needless replies...I have a new battery in the car. The old battery had had a few mornings of barely starting and I saw that could be an issue and chaged the battery anyway. Didn't solve the problem. And I don't have bluetooth.

Thanks
Niall

[dan2485]

Niall, look at the amp in the boot. check the fuses.

If the amp is shot you can get a fibre bypass lead and change the radio coding to the internal amp to get you going.

[Nmaccann]

Hi Dan
Thanks for the reply.
Is there a fuse on the amp itself or fuses somewhere on the left side? I think the amp is on the left side and the fuses on the right side. All the fuses on the right are ok. The 30A fuse i believe is for the Amp. I even tried taking that fuse out for a few days and no difference.
If it was the fuse it wouldn't have worked for the 10-15 mins two weeks later. Likewise if it was the amp it would surely have shown an electrical error rather than an optical error for the sound system?
I will try the bypass while looking in there and see if any difference.
Thanks
Niall

[Gunnark100]

change the radio coding to the internal amp to get you going.

On 2G high, are you sure?

[B5NUT]

That would not even work on 3G as you would have to rewire the speakers, from the AMP to the Radio module.