Mmi trouble. Please help

[Ryan Purdue]

Does anyone have any knowledge of the mmi system or optical bus on vag com?

I had the following errors so replaced the control head and now I have the second set of errors.

Does it look like every unit has actually gone faulty? The car was in an accident.

 

[Ryan Purdue]

Attached

 

[Alexander Welton]

I have essentially the same set of errors but haven't yet begun resolving the issue. I was just wondering which module the "control head" is .. I thought it might be the button box by the centre arm rest but that has no optical connection, so I am confused as to where this module is located. What did you replace to eliminate the control head errors?

Also, in terms of the other modules, I might suggest checking the power supply to each module on the optical bus that is showing an error. If they all have supply and they "cannot be reached", then they are likely bad. If there is no power supply then the issue might be between the gateway and modules.