Quiescent current stage 1 & 2 intermittent

**dan2485** · 13-06-2019,01:12 PM

Great Update and result.

in Audi SSP 286 it shows that MMI units have internal PSU's, which would suggest that the control head PSU was the issue and the battery regulator was reporting this.

Did any of the Scans show the fault in the Control head as this could be a good precursor to a module failing.

If not then without donor item this could a pain identify a culprit until it fails like yours did.

**rjsdavis** · 16-06-2019,07:04 PM

Originally Posted by dan2485

Great Update and result.

in Audi SSP 286 it shows that MMI units have internal PSU's, which would suggest that the control head PSU was the issue and the battery regulator was reporting this.

Did any of the Scans show the fault in the Control head as this could be a good precursor to a module failing.

If not then without donor item this could a pain identify a culprit until it fails like yours did.

Sadly, prior to the unit actually failing, there was no mention of it whatsoever on any scan... which is what made a major pain to have tracked down prior to failure. I'm not even sure that it could have been, as the gremlins that were occurring before it failed, were intermittent and simply aggravating. However, it is likely that other failing CH units will probably exhibit similar intermittent failure traits.

It's even worse than just having a donor unit - given that it would also need CP removal as well! All in all, a very expensive potential test if you don't have access to a live copy of ODIS!

**dan2485** · 16-06-2019,08:42 PM

You can get FVDI to remove cp for around £200 to £250.

If you are looking to keep the car then it is worth the investment.

**rjsdavis** · 16-06-2019,11:20 PM

Originally Posted by dan2485

You can get FVDI to remove cp for around £200 to £250.

If you are looking to keep the car then it is worth the investment.

I've seen the Abrites video for removing CP on YouTube - and it looked like just the job, but I'd heard from elsewhere that you need to have a link into the ODIS/VAG database to be able to remove CP / program keys and so on...

Do you have FVDI/Abrites and is it reliable?

**Paddyposh** · 19-06-2019,10:34 AM

Sorry to jump in here randomly.
Hi Dan,

Tried to PM regarding a VCDS check as I am local to you, but says your inbox is full.

Are you able to reach out to me to discuss?

Cheers
Pat

**dan2485** · 19-06-2019,01:36 PM

PM me now.

**Paddyposh** · 19-06-2019,03:41 PM

Will do cheers

**Paddyposh** · 19-06-2019,04:07 PM

.

**roy.stubbs@talk** · 15-06-2020,08:54 PM

Hi
I hope you are well?
I have arrived at your thread as I have a dreaded MMI/Battery drain issue.
I have lived with it for a looooooooong time now, but its finally got my goat!

The Car is an A6 C6 2006 2.0 TDI.
The fault has been very inconsistent and the car over the years has been in and out of the dealers, Its had a two new batteries in its time, both coded to the car. Its had the MMI update (which removes the battery level indecator) and a new lead between the starter motor and the connection box (in the wiper motor compartment where it spilts the front to rear loom) as there was a high resistance in the crimp at the jump start point (evedent by the fact it started to melt the housing around it) causing low charging voltage to the battery.
Every time I think I've fixed it, some months/weeks/days later it does it again!
So today i went to it, failed to start.....
My question to you is: When you say control head, do you mean the buttons controls around the gear stick? and if so, is there a module attached to it, or does it just relay messages/send commands to all the satalite modules (Amp, Tuner, CD,Phone etc) dotted about.
I don't appear to have the consistent shutting down issue you had or the loss of sound from speakers, but I'm wondering if its starting up by it's self, or maybe not shutdown properly every time!
Also whats making me think it could be the cause is from time to time I have the non illumination of the buttons, and the occastional swithing of of the system.
Any advice would be graetly recieved...
Also, where did you find the part number? is it possible to get a look at it without removing it all?
Thanks in advance
Roy

**dan2485** · 16-06-2020,07:31 AM

Goggle 'audi ssp326' and 'audi ssp 286'.

To learn about the system before you start changing items at will.

If you get a most loop bypass lead then you can disconect the ancillary items one at a time to see if the battery drain fault disappears, ie all the items with a fibre optic link have PSU's in them.

Leave the control unit J523 till the end.