MMI Not working - Startup Fault
05-04-2018, 09:47 PM
#11
AudiWorld Member
Thread Starter
Join Date: Apr 2000
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
- memory 1: does NOT adjust front/back seat position, regardless of initial position. DOES adjust seat bottoms
- memory 2: adjusts all 8 directions as expected.
I’m not sure why I can’t get memory 1 to save/adjust the front back—it seems like this is a computer memory issue, not a mechanical one. But the actual seat motors are all working.
05-04-2018, 10:37 PM
#12
That was an awesome post. I went back to double check my seat adjustment and this is what I found:
- memory 1: does NOT adjust front/back seat position, regardless of initial position. DOES adjust seat bottoms
- memory 2: adjusts all 8 directions as expected.
I’m not sure why I can’t get memory 1 to save/adjust the front back—it seems like this is a computer memory issue, not a mechanical one. But the actual seat motors are all working.
Last edited by kelisko; 05-05-2018 at 12:22 AM.
05-05-2018, 07:36 AM
#13
AudiWorld Member
I also just finished checking all the fuses in the L/R panels on the front dash. Also the rear right trunk fuses. All good. But i checked near the trunk mounted battery and was unable to find anything that would contain a 60A "I" shaped fuse. Any idea where it would be on an S6?
That's the layout of fuses in the 2005 A8 that I've got. The A8's battery is in the rear right compartment behind the panel and 'at the back' are three huge metallic plate fuses for various car components.
I'd expect the A/S6 to have them but I don't know where they are ...
Julian
PS Interesting story about the door mirrors and MMI problems discussed in this thread. I don't think the MMI directly talks to the mirrors and doors, but there's definitely a door ECU that probably connects to the Central Convenience ECU that does talk to the MMI. [Obviously, only the media components 'talk' on the optical MOST bus - the M in MOST stands for Media. The MMI controller talks via other buses such as the CAN bus and that's what the Gateway is for - it connects all the buses together in the dash.
Julian
05-07-2018, 02:40 AM
#14
Update... Currently, I am uncertain of what happened but I thought I'd share my experience. I am still troubleshooting.
As a reminder, note that I am suspecting a short in my driver's door rear view mirror to cause my MMI malfunction.
1. Yesterday, I removed the driver's side door panel and disconnected the two cords holding the panel. MMI didn't work.
2. I disconnected all connections in the door except the window motor. MMI didn't work.
3. I unplugged the battery for about 60 sec and plugged it back. MMI restarted and worked. I turned it off.
4. I connected everything back in the door except the rear view mirror. MMI works.
5. I thought of fixing the short and swapped the wires of two connections in the rear view mirror cable which had the same color code and connected the rear view mirror. MMI stopped working.
6. I disconnected the rear view mirror. MMI didn't work.
7. I disconnected the battery for about 60 sec and plugged it back. MMI restarted but crashed when turned on.
8. I'm confused
9. I disconnected the battery for about 10 min and plugged it back. Date/Time are gone. MMI restarted, worked for about 1 min and crashed again.
10. I scanned the car for faults. Faults were found in driver's door (mirror shorts), passenger's door (in relation with driver's door) and Gateway data bus (Optical data bus closed)
11. I cleared all faults, disconnected the battery for about 10 min, reconnected the battery. MMI restarted and crashed. (You could hear delayed static in the driver's speaker and clicks from the MMI unit in the trunk)
12. I tried the same thing again with the same results.
13. I gave up and put everything back, including the driver's door rear view mirror. If I can't have the MMI, at least I'd like to be able to fold my mirror.
14. This morning I gave it another shot.
15. I removed the door panel + two connections and unplugged the driver's side rear view mirror. MMI didn't work.
16. I unplugged the battery for about 10 min and plugged it back. MMI restarted, worked for about 1 min and crashed.
17. I scanned the car for faults. Faults were found in driver's door (mirror shorts), passenger's door (in relation with driver's door) and Gateway data bus (Optical data bus)
18. I cleared all faults, disconnected the battery for about 10 min, reconnected the battery. MMI restarted and crashed. (You could hear delayed static in the driver's speaker and clicks from the MMI unit in the trunk)
19. I left the driver's side rear view mirror disconnected and put everything back.
20. I scanned the car for faults. No faults found in doors but fault found in the Gateway data bus (Optical data bus). Cleared it.
21. I disconnected the battery again and went to take a shower and get ready to go to work.
22. About 15 min later, I was ready to leave. I connected the battery. MMI restarted and worked when turned on. I was suspecting it to crash after a few seconds so I quickly set up the date and time. And it crashed.
23. I started driving and 2 min later I thought of starting the MMI again while driving. It started and worked and did not crash my entire way to work. The sound was crystal clear. I used to have intermittent static issues but the static seems to have vanished and the sound quality was better than before.
I reserve final judgment for later when I'll use the car for at least a week. I will report back.
As a reminder, note that I am suspecting a short in my driver's door rear view mirror to cause my MMI malfunction.
1. Yesterday, I removed the driver's side door panel and disconnected the two cords holding the panel. MMI didn't work.
2. I disconnected all connections in the door except the window motor. MMI didn't work.
3. I unplugged the battery for about 60 sec and plugged it back. MMI restarted and worked. I turned it off.
4. I connected everything back in the door except the rear view mirror. MMI works.
5. I thought of fixing the short and swapped the wires of two connections in the rear view mirror cable which had the same color code and connected the rear view mirror. MMI stopped working.
6. I disconnected the rear view mirror. MMI didn't work.
7. I disconnected the battery for about 60 sec and plugged it back. MMI restarted but crashed when turned on.
8. I'm confused
9. I disconnected the battery for about 10 min and plugged it back. Date/Time are gone. MMI restarted, worked for about 1 min and crashed again.
10. I scanned the car for faults. Faults were found in driver's door (mirror shorts), passenger's door (in relation with driver's door) and Gateway data bus (Optical data bus closed)
11. I cleared all faults, disconnected the battery for about 10 min, reconnected the battery. MMI restarted and crashed. (You could hear delayed static in the driver's speaker and clicks from the MMI unit in the trunk)
12. I tried the same thing again with the same results.
13. I gave up and put everything back, including the driver's door rear view mirror. If I can't have the MMI, at least I'd like to be able to fold my mirror.
14. This morning I gave it another shot.
15. I removed the door panel + two connections and unplugged the driver's side rear view mirror. MMI didn't work.
16. I unplugged the battery for about 10 min and plugged it back. MMI restarted, worked for about 1 min and crashed.
17. I scanned the car for faults. Faults were found in driver's door (mirror shorts), passenger's door (in relation with driver's door) and Gateway data bus (Optical data bus)
18. I cleared all faults, disconnected the battery for about 10 min, reconnected the battery. MMI restarted and crashed. (You could hear delayed static in the driver's speaker and clicks from the MMI unit in the trunk)
19. I left the driver's side rear view mirror disconnected and put everything back.
20. I scanned the car for faults. No faults found in doors but fault found in the Gateway data bus (Optical data bus). Cleared it.
21. I disconnected the battery again and went to take a shower and get ready to go to work.
22. About 15 min later, I was ready to leave. I connected the battery. MMI restarted and worked when turned on. I was suspecting it to crash after a few seconds so I quickly set up the date and time. And it crashed.
23. I started driving and 2 min later I thought of starting the MMI again while driving. It started and worked and did not crash my entire way to work. The sound was crystal clear. I used to have intermittent static issues but the static seems to have vanished and the sound quality was better than before.
I reserve final judgment for later when I'll use the car for at least a week. I will report back.
Last edited by kelisko; 05-07-2018 at 02:44 AM.
05-07-2018, 03:30 PM
#15
AudiWorld Member
Thread Starter
Join Date: Apr 2000
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
I feel your pain.
From my perspective, it means that I may have to think beyond the MOST ring. I still need to rule out an optical fault, but I need more loopback connectors to do so. But if other electrical faults can also cause a similar behavior, then isolating my problem is going to be more challenging.
The original cause was water a flooded front right passenger footwell. The exact source of those leaks is still unknown––but I did spot a few last drips onto the gear shift boot. However, last weekend my car was parked outside in a similarly torrential downpour and there was no signs of leakage. So this leads me to believe it was a cracked sunroof or maybe window.
Any suggestions to the sensitive components that might be in those locations?
From my perspective, it means that I may have to think beyond the MOST ring. I still need to rule out an optical fault, but I need more loopback connectors to do so. But if other electrical faults can also cause a similar behavior, then isolating my problem is going to be more challenging.
The original cause was water a flooded front right passenger footwell. The exact source of those leaks is still unknown––but I did spot a few last drips onto the gear shift boot. However, last weekend my car was parked outside in a similarly torrential downpour and there was no signs of leakage. So this leads me to believe it was a cracked sunroof or maybe window.
Any suggestions to the sensitive components that might be in those locations?
05-08-2018, 01:59 AM
#16
Wet center console:
https://www.audiworld.com/forums/a6-...s-now-2786495/
Cleaning cowl drains:
https://www.audiworld.com/how-tos/a/...-drains-422385
Cleaning sunroof drains:
https://www.audiworld.com/forums/a6-...rd-do-2789878/
Removing the sunroof:
https://www.audiworld.com/forums/a6-...-more-2909186/
BTW my MMI has been flawless until now. I will keep you posted.
05-09-2018, 07:21 AM
#17
AudiWorld Member
Thread Starter
Join Date: Apr 2000
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
One of the first things I did was remove the center console and the MMI controller/buttons and clean the green PC board under the buttons. Still didn't work. The board looked perfectly clean, but it may still have water damage. If I can rule out MOST loop issues, I might just replace the MMI controller board.
05-13-2018, 01:30 AM
#18
AudiWorld Member
Thread Starter
Join Date: Apr 2000
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts
Did you see something similar when you had the mirror short? I'm wondering if the J533/Gateway is unreachable because of an electrical short elsewhere. I may be searching for a fix in the wrong place...
05-14-2018, 03:21 AM
#19
Right now I'm running blind without a diagnostic test of the Optical ring. VCDS "Diagnosis Manager = Gateway/group 19 > Output Test" gave me an "unable to connect" error.
Did you see something similar when you had the mirror short? I'm wondering if the J533/Gateway is unreachable because of an electrical short elsewhere. I may be searching for a fix in the wrong place...
Did you see something similar when you had the mirror short? I'm wondering if the J533/Gateway is unreachable because of an electrical short elsewhere. I may be searching for a fix in the wrong place...
BTW it's been a week and my MMI still works.
05-14-2018, 05:16 AM
#20
AudiWorld Member
Thread Starter
Join Date: Apr 2000
Posts: 66
Likes: 0
Received 0 Likes
on
0 Posts