MMI 2G High Dead, need help to troubleshoot!!!

[streamline]

So got into my car a couple days ago and when starting the car, the MMI screen flashed but then goes black. Nothing is functional. I have tried the forced restart (Setup, Knob, Upper Right) and splash screen shows and disappears (same as car startup). Fuses look to be ok not sure where to look next. Any help would be appreciated.

[jschrauwen]

Do you think it's electronic related or a screen failure?

Sent from my SM-N900W8 using Tapatalk

[streamline]

Do you think it's electronic related or a screen failure?

Sent from my SM-N900W8 using Tapatalk

I dont think its a screen failure because color splash screen displays fine, then when usual menus would come up it turn black.

[Smac770]

scan for dtcs, see if the J523 is even accessible.

[A4 Centaur]

If you have the B&O check the fuse on the amp. Mine was blown and everything was black.

[ashrafnisar]

If you have the B&O check the fuse on the amp. Mine was blown and everything was black.

I haven't had a chance to really get into the trunk - am I correct in assuming the amp is right on top? The silver unit with cooling fins up top?

This thread is timely as I just purchased a B8 with the same issue. The screen fires up when I press power or any other buttons (NAV, CAR etc.) but then blacks out. I've been doing some Google-fu and have read a lot of info but am hoping some of the folks here can guide me specifically on the B8 platform.

[Alan_T]

I haven't had a chance to really get into the trunk - am I correct in assuming the amp is right on top? The silver unit with cooling fins up top?

This thread is timely as I just purchased a B8 with the same issue. The screen fires up when I press power or any other buttons (NAV, CAR etc.) but then blacks out. I've been doing some Google-fu and have read a lot of info but am hoping some of the folks here can guide me specifically on the B8 platform.

Hi, New on here but I've had the same issue and fixed it.

So the MMI system uses fiber-optics, in a series loop, unfortunately this means if you have one faulty component, then the whole thing goes down. mine was doing exactly what you describe, turn it on, will get to the splash screen and then turn back off again.

If you go to ebay you can buy a ''bypass loop''for a few £, and what you need to do is unplug each component one at a time and put the bypass loop in place instead.
When you find the faulty component, the system will turn on but with reduced functions, I.e if you plug it in instead of the blutooth unit, everything should work instead of the blutooth etc.

mine was the blutooth unit under the rhs footwell, fairly common as they can get wet, also look at the components in the boot (amp nav unit etc) as that's another common issue, then itll just be a case of finding a replacement part with the same part number and getting it coded to work. (because of Audi's component protection system).



I hope this helps, get in touch if you have any questions!

Al.

[ashrafnisar]

Hi, New on here but I've had the same issue and fixed it.

So the MMI system uses fiber-optics, in a series loop, unfortunately this means if you have one faulty component, then the whole thing goes down. mine was doing exactly what you describe, turn it on, will get to the splash screen and then turn back off again.

If you go to ebay you can buy a ''bypass loop''for a few £, and what you need to do is unplug each component one at a time and put the bypass loop in place instead.
When you find the faulty component, the system will turn on but with reduced functions, I.e if you plug it in instead of the blutooth unit, everything should work instead of the blutooth etc.

mine was the blutooth unit under the rhs footwell, fairly common as they can get wet, also look at the components in the boot (amp nav unit etc) as that's another common issue, then itll just be a case of finding a replacement part with the same part number and getting it coded to work. (because of Audi's component protection system).



I hope this helps, get in touch if you have any questions!

Al.

Thanks, Alan. I did order the loop and should have it today or Monday. I took a closer look after I posted and saw the shock (that dampens the trunk opening) was leaking and I'm seeing residue on the amp. The foam on the trunk floor also seems slightly damp (not oily) so there's also some water ingress from somewhere.

I noticed the Nav unit lights up if I press the eject button so I'm assuming the amp is the likely culprit here. Will know more once I've popped it off and tested with the loop.

Can you confirm if there's a fuse on the amp itself or if it's housed in one of the fuse blocks around the car?

[ashrafnisar]

Thanks, Alan. I did order the loop and should have it today or Monday. I took a closer look after I posted and saw the shock (that dampens the trunk opening) was leaking and I'm seeing residue on the amp. The foam on the trunk floor also seems slightly damp (not oily) so there's also some water ingress from somewhere.

I noticed the Nav unit lights up if I press the eject button so I'm assuming the amp is the likely culprit here. Will know more once I've popped it off and tested with the loop.

Can you confirm if there's a fuse on the amp itself or if it's housed in one of the fuse blocks around the car?

Ok, don't see a fuse on the amp itself so that question is answered.

I took the amp out and looped the fiber connection. I then saw the signal pass to each of the modules underneath (3 of them, 1 is Nav). However, headunit/MMI won't boot or stay powered on.

Is this normal with the amp out of the loop or does it indicate there is something still wrong elsewhere in the system?

[Smac770]

If you have a scan tool, it'll make clear when there is a MOST bus fault vs. it being something else. Ring break diagnosis is managed by the J533, which has a separate connection to all MOST ring members.

If you have a Nav unit in your left rear electronics stack, I assume that's the DVD drive and you have an '09 with MMI 2G? Stack would be J525 sound processor/amp, R AM/FM radio tuner, J401 DVD Navigation, and then R146 SAT radio tuner. The MMI control module will be the J523, sitting behind the climate controls and below the in-dash CD changer. This unit completely powers and controls the J685 FID (dash screen), so if the J523 is unhappy, the screen will be blank/off.

Fuses are always in the fuse panels, not on the devices. Investigate the fuses 1 and 3 in the middle row of fuse panel D (right end of dash). Fuse 1 should be 5A for the R41 in-dash CD changer and the R199 AMI in the glovebox. Fuse 3 probably isn't there; it isn't in my '09 MMI 2G High with Navigation vehicle. Then in fuse panel F (the right rear cargo area; I don't give a damn about how the owner's manual labels the rows there as "panels", that's wrong), row 3 (the one with C on it), fuse 3 7.5A is the R radio and J401 DVD Nav, fuse 4 30A is the J525 amp, fuse 5 5A is the J523 MMI control module (which in turn powers the J685 FID screen),

Keep in mind that all B8 (A4, A5, Q5) switched to MMI 3G for MY 2010. So only '08 A5 and '09 will have MMI 2G.

You're doing unnecessary guessing without a scan tool.

[ashrafnisar]

If you have a scan tool, it'll make clear when there is a MOST bus fault vs. it being something else. Ring break diagnosis is managed by the J533, which has a separate connection to all MOST ring members.

If you have a Nav unit in your left rear electronics stack, I assume that's the DVD drive and you have an '09 with MMI 2G? Stack would be J525 sound processor/amp, R AM/FM radio tuner, J401 DVD Navigation, and then R146 SAT radio tuner. The MMI control module will be the J523, sitting behind the climate controls and below the in-dash CD changer. This unit completely powers and controls the J685 FID (dash screen), so if the J523 is unhappy, the screen will be blank/off.

Fuses are always in the fuse panels, not on the devices. Investigate the fuses 1 and 3 in the middle row of fuse panel D (right end of dash). Fuse 1 should be 5A for the R41 in-dash CD changer and the R199 AMI in the glovebox. Fuse 3 probably isn't there; it isn't in my '09 MMI 2G High with Navigation vehicle. Then in fuse panel F (the right rear cargo area; I don't give a damn about how the owner's manual labels the rows there as "panels", that's wrong), row 3 (the one with C on it), fuse 3 7.5A is the R radio and J401 DVD Nav, fuse 4 30A is the J525 amp, fuse 5 5A is the J523 MMI control module (which in turn powers the J685 FID screen),

Keep in mind that all B8 (A4, A5, Q5) switched to MMI 3G for MY 2010. So only '08 A5 and '09 will have MMI 2G.

You're doing unnecessary guessing without a scan tool.

I had the same thought since posting and picked up a VAGCOM cable from a buddy on the way home. You are correct in saying it's an 09 A4 and from everything I've read online, I should have a 2G.

This is my first time diagnosing one of these cars so I'm a little out of my depth. I'm going to go check out all the fuses since those are a simple item to cross off my list. I was also planning on running the Optical bus diagnostic via VCDS as I assume that should give me a better idea of how to proceed.

I'm not sure how detailed the diagnostic is but I'll be back with results once I've run it. I was also planning on running the auto-scan so I can anything else that's in memory, clear all codes and then re-run the scan + opt.bus diagnostic to see if anything has changed.

Am I approaching this correctly? When running the optical diagnostic, will the amp being disconnected start throwing "false" failures or is it just checking for continuity in signal via the fiber? Heading down now with my fingers crossed :)

[Gunnark100]

Am I approaching this correctly?

Just post opticalbus test result, it may narrow down the isolation process, but not always. If fuses ok, optical test useless, then just go with loop, isolating module by module, amp,radio,cd,bt etc...

[ashrafnisar]

Just post opticalbus test result, it may narrow down the isolation process, but not always. If fuses ok, optical test useless, then just go with loop, isolating module by module, amp,radio,cd,bt etc...

Will do. Heading down to scan and check fuses shortly.

Also ordered a few extra loops in case more than 1 module is bad so should have that tomorrow.

Thanks!

Sent from my SM-N975W using Tapatalk

[Smac770]

Just start with a full vehicle scan for DTCs and see what the car already knows and what devices might not currently be accessible. This is always your start point.

[ashrafnisar]

Ok, some interesting developments.

- Did the optical bus scan and came back with a couple that showed ERROR.

Control Module Part Number: 8T0 907 468 Q
  Component and/or Version: GW-BEM 5CAN-M H10 0095

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                  
1E-Media Player 2   	OK                  	OK                  
77-Telephone        	ERROR               	ERROR               
47-Sound System     	ERROR               	ERROR               
67-Voice Control    	OK                  	ERROR               
56-Radio            	OK                  	OK                  
37-Navigation       	OK                  	OK                  
0F-Digital Radio    	ERROR               	ERROR               

************************************************************
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Control Module Part Number: 8T0 907 468 Q
  Component and/or Version: GW-BEM 5CAN-M H10 0095

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                  
1E-Media Player 2   	OK                  	OK                  
77-Telephone        	OK                  	OK                  
47-Sound System     	ERROR               	ERROR               
67-Voice Control    	OK                  	OK                  
56-Radio            	OK                  	OK                  
37-Navigation       	OK                  	OK                  
0F-Digital Radio(SAT)	OK                  	OK

- Then started checking fuses (test light + visual inspection).
- All of them checked out but when I hopped back in the car to resume with VCDS, the MMI was up and running .


Almost seems that removing and re-inserting fuses allowed the system to reset? When I was testing mid-day yesterday, I had done the ignition cycle and MMI reset in between each step but perhaps that wasn't enough?


- Proceeded to scan and clear all DTC's - I have them saved just in case I need to look back later.
- Took the car out for a drive and had the MMI cut out/shut off 3-4 times. Pressing power or NAV/CAR etc. would boot it up each time.
- I went back and removed+attached the optical loop and it has been fine since.
- The only code related to the system at this time is that the J525 is unreachable - absolutely normal since I have it disconnected.
- EDIT: Also have "02635 - Tuner Not Enabled/Activated" code from 0F-Digital Radio module. Will look into whether this is tied to amplifier as well.


The loop is one of those cheap ones (not like the VAG one where the fiber is housed in the plastic bracket) from ebay so I'm starting to suspect that may be the cause of the shutdowns while moving/driving. I'm going to monitor over the next couple of days to see what happens.


One thing I did notice (since it was snowing yesterday) is that there were a couple of water droplets right on top of the amp/carrier area. Thankfully I had a plastic bag draped over that area and the fried amp is still out so no damage to the other units. I've seen reports on A5OC that the water ingress is from the rubber trunk stop - is that the same issue on the A4's? Is there a cover available for it OR has anyone come up with a long-term solution?


Thank you to everyone that has chimed in to help thus far. Smac770, the post with fuses and locations was fantastic as it made the process very quick and also allowed the MMI to start back up. Glad to be back on AZ

[Smac770]

02635 will always be there if you do not have an active Sirius subscription.

Wet electronics in both rear corners is not uncommon in the B8; believe there's a thread here about repairing soaked J525s (the amp).

As for the fuse, it could have been some corrosion build up and just needed a re-seating to make a new fresh connection. If a bad disk light came on one of the disks in my disk arrays back in the day, first step is unplug/replug see if the light goes out. That fixed it most of the time. Just needed a clean connection reestablishment.

[ashrafnisar]

Will do some searching - I hadn't come across a J525 repair thread in my previous hunt but I may have passed over some threads based on their title.

Is the J525 meant to refer to the B&O amplifier or is the non-B&O unit also referred to as J525 while bearing a different part #? Asking so that I don't skip over content (non-B&O) that may still be relevant to my issue.

In related news, I popped open the amp today and from what I see, the damage is on the larger/longer part of the board. I recall reading that the CP data is housed on the short board. If that's true, I may be able to pick up an amp/board, put the two halves together and skip a trip to the dealer

[ashrafnisar]

Also, I've been out and about all day with no interruptions to the MMI.

To confirm my hunch of the loop being the issue, I went to the back and wiggled the connector and wire on the loop itself. Through the rear window, I saw the MMI display shut down. Excellent example of why good tools are important as I probably spent a little longer than needed during troubleshooting because of the faulty/finicky test loop.

[Smac770]

J525 is the outboard sound processor/amplifier. These terms are generic, not specific. Ie, your part number for your J525 will vary depending on your installed equipment. The plugs on your J525 will vary depending on your part number. So B&O, non-B&O, if you have an amp in the rear left, it's the J525 from a wiring and system perspective. MMI 3G has the amplifier integrated into the radio R for non-B&O; in that configuration, I don't know if the radio R appears on the gateway list as two devices (R and J525) or just as an R, but that's not relevant to your MMI 2G scenario.

[streamline]

Here is my scan, a lot going on here:

Tuesday,03,March,2020,16:30:21:32264
VCDS Version: Release 11.11.3
Data version: 20120401


Chassis Type: 8T0
Scan: 01 02 03 05 07 08 09 0E 0F 10 15 16 17 19 1E 36 37 3C 42 46
          47 52 53 55 56 62 65 67 6C 6D 72 77

VIN: WAUXF78K99A126972   Mileage: 232980km/144767miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
07-Control Head -- Status: Cannot be reached 1100
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
0E-Media Player 1 -- Status: Cannot be reached 1100
0F-Digital Radio -- Status: Cannot be reached 1100
10-Park/Steer Assist -- Status: Cannot be reached 1100
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
1E-Media Player 2 -- Status: Cannot be reached 1100
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: Cannot be reached 1100
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: Cannot be reached 1100
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Xenon Range -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: Not registered 0011
67-Voice Control -- Status: Cannot be reached 1100
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: Malfunction 0010
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: Cannot be reached 1100
 
-------------------------------------------------------------------------------
Address 01: Engine (DL0MA-CAEB)       Labels: 06H-907-115-CAB.clb
   Part No SW: 8K2 907 115 AL    HW: 8K2 907 115 D
   Component: 2.0l R4/4V TF H14 0001  
   Revision: E1H14---    
   Coding: 010C010A190F0160
   Shop #: WSC 06117 444 101338
   ASAM Dataset: EV_ECM20TFS0118K2907115AL 001001
   ROD: EV_ECM20TFS0118K2907115AL.rod
   VCID: 79F3F33DF8C2731

No fault code found.
Readiness: 1110 0101

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels: 0B6-927-156.clb
   Part No SW: 8K0 927 158 C    HW: 0B6 927 156 
   Component: 0B6 20TFSIUSA H04 0030  
   Revision: --H04---    
   Coding: 001002
   Shop #: WSC 06335 000 00000
   ASAM Dataset: EV_TCMAL651 A01004
   ROD: EV_TCMAL651.rod
   VCID: 36693801895C5C9

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels: 8K0-907-379.clb
   Part No SW: 8K0 907 379 AB    HW: 8K0 907 379 AB
   Component: ESP8 quattro  H04 0060  
   Revision: --------    Serial number: --------------
   Coding: 150500
   Shop #: WSC 06335 000 00000
   VCID: 79F3F33DF0C2731

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels: 8K0-907-064-05.clb
   Part No SW: 8K0 907 064 BH    HW: 8K0 907 064 AH
   Component: BCM2 1.1      H80 0252  
   Revision: 00002001    
   Coding: 0D0200
   Shop #: WSC 06335 000 00000
   VCID: 77F7F505C6D6651

   Subsystem 1 - Part No SW: 8K0 905 852 D    HW: 8K0 905 852 D
   Component: ELVAUDIB8  H36 0041 

No fault code found.

-------------------------------------------------------------------------------
Address 07: Control Head
Cannot be reached

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels: Redir Fail!
   Part No SW: 8T1 820 043 AC    HW: 8T1 820 043 AC
   Component: KLIMA 3 ZONEN H06 0140  
   Revision: C1000000    Serial number: 0103.09.081123
   Coding: 64002000
   Shop #: WSC 06335 000 00000
   VCID: 72E1C411ADB4009

1 Fault Found:
01592 - Air Quality Sensor (G238) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 0
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:04:46

             Freeze Frame:
                    Temperature: 15.0°C


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels: 8K0-907-063.clb
   Part No SW: 8K0 907 063 D    HW: 8K0 907 063 D
   Component: BCM1 1.0      H22 0253  
   Revision: 05022001    Serial number: 00000000221606
   Coding: 26001091063CAF010000080300003D0D0F1C460800010161000000
   Shop #: WSC 59312 001 1048576
   VCID: 30650E196338729

   Subsystem 1 - Part No SW: 8K1 955 119 A    HW: 8T1 955 119   Labels: 1KX-955-119.CLB
   Component: WWS 090908  H06 0070 
   Coding: 00FD11

   Subsystem 2 - Part No SW: 8K0 955 559     HW: 8K0 955 559   Labels: 8K0-955-559.CLB
   Component: RLS  H04 0003 
   Coding: 025028

   Subsystem 3 - Part No SW: 8K0 941 531 G    HW: 8K0 941 531 G
   Component: E1 - LDS  H07 0070 

   Subsystem 4 - Part No SW: 8K0 907 410 A    HW: 8K0 907 410 A
   Component: UGDO HL US  H04 0060 

1 Fault Found:
01592 - Air Quality Sensor (G238) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 0
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:05:00


-------------------------------------------------------------------------------
Address 0E: Media Player 1
Cannot be reached

-------------------------------------------------------------------------------
Address 0F: Digital Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist
Cannot be reached

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels: 8K0-959-655.clb
   Part No SW: 8K0 959 655 K    HW: 8K0 959 655 K
   Component: AirbagVW-AU10 H44 0610  
   Serial number: 003GLD0NX07U  
   Coding: 303837354230303030304A55304C384B3053
   Shop #: WSC 59312 001 1048576
   ASAM Dataset: EV_AirbaECUVWAUDI010 003010
   ROD: EV_AirbaECUVWAUDI010_AU48.rod
   VCID: 458B4FCDC4BAC71

   Seat occupied recognition: 
   Subsystem 1 - Part No SW: 8K0 959 339 B    HW: 8K0 959 339 B
   Component: BF-Gewichtss.  H01 0030 
   Serial number: 5810000R0800001W8X

   Crash sensor for side airbag; driver side: 
   Serial number: 6334MSME3F302F5AQ

   Crash sensor for side airbag; passenger side: 
   Serial number: 6344MSME3F34451DM

   Crash sensor for side airbag; rear driver side: 
   Serial number: 6352QSME3A0C440CM

   Crash sensor for side airbag; rear passenger side: 
   Serial number: 6362QSME22092F0AI

   Crash sensor for front airbag; driver side: 
   Serial number: 63732SME0E091E04+

   Crash sensor for front airbag; passenger side: 
   Serial number: 63832SME0E091C182

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels: 8K0-953-568.clb
   Part No SW: 8K0 953 568 F    HW: 8K0 953 568 F
   Component: Lenks.Modul   H13 0013  
   Revision: --------    Serial number: 90315HI7000B3 
   Coding: 000017
   Shop #: WSC 06335 000 00000
   VCID: 3D7B272DA46A8F1

   Component: E221 - MFL  H02 0003 

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels: 8T0-920-xxx-17.clb
   Part No SW: 8K0 920 980 A    HW: 8K0 920 980 A
   Component: KOMBIINSTR.   H17 0224  
   Revision: 00100000    Serial number: 9E1745C98     
   Coding: 831611000200D705020000
   Shop #: WSC 59312 001 10485
   VCID: 30650E196338729

1 Fault Found:
01044 - Control Module Incorrectly Coded 
            000 -  - 
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 0
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:05:57


-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels: 8T0-907-468.clb
   Part No SW: 8T0 907 468 L    HW: 8T0 907 468 L
   Component: GW-BEM 5CAN-M H10 0094  
   Revision: 4FB50047    Serial number: 4700F088288139
   Coding: 000303
   Shop #: WSC 06335 000 00000
   VCID: 4A917CF1E5A4289

   Subsystem 1 - Part No SW: 8K0 915 181 B    HW: 8K0 915 181 B
   Component: J367-BDM  H04 0150 

3 Faults Found:
01327 - Control Module for Parking Aid (J446) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 1
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:06:08

01044 - Control Module Incorrectly Coded 
            000 -  - 
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 1
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:06:12

00384 - Optical Databus 
            011 - Open Circuit
             Freeze Frame:
                    Fault Status: 01101011
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 1
                    Mileage: 232982 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:14:53


-------------------------------------------------------------------------------
Address 1E: Media Player 2
Cannot be reached

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr (J136)       Labels: None
   Part No SW: 8K0 959 760     HW: 8K0 959 760 
   Component: MEM-FS        H05 0043  
   Revision: AA000000    Serial number: 00001001141127
   Coding: 00581B00000000000000
   Shop #: WSC 06335 000 00000
   VCID: F7F7750546D6E51

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation
Cannot be reached

-------------------------------------------------------------------------------
Address 3C: Lane Change        Labels: Redir Fail!
   Part No SW: 8K0 907 566 B    HW: 4L0 907 566 B
   Component: J0769_SWA_MasterH01 0050  
   Revision: 00H01000    Serial number: 6PZ 009 014-13
   Coding: 0000002
   Shop #: WSC 06335 000 00000
   VCID: 36693801415C5C9

   Part No: 8K0 907 568 B
   Component: J0770_SWA_Slave_H01 0050

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels: 8K0-959-793.clb
   Part No SW: 8K0 959 793 B    HW: 8K0 959 793 
   Component: TSG FA        H10 0170  
   Revision:             Serial number: 0000007677058 
   Coding: 011C13204E00410001
   Shop #: WSC 06335 123 12345
   VCID: 3F875D25AE669D1

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels: 8K0-907-064-46.clb
   Part No SW: 8K0 907 064 BH    HW: 8K0 907 064 AH
   Component: BCM2 1.1      H80 0252  
   Revision: 00002001    Serial number: 0113987552    
   Coding: 0126023A207A741500B0020000000000
   Shop #: WSC 59312 001 1048576
   VCID: 77F7F505C6D6651

   Subsystem 1 - Part No SW: 8K0 959 719     HW: 8K0 959 719 
   Component: GTO BF  H06 0040 

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H03 1301 

   Subsystem 3 - Part No SW: 8K0 959 591     HW: 8K0 959 591 
   Component: J245 PS127  H06 0037 

   Subsystem 4 - Part No SW: 8K0 959 591     HW: 8K0 959 591 
   Component: J394 PS222  H06 0037 

No fault code found.

-------------------------------------------------------------------------------
Address 47: Sound System
Cannot be reached

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels: 8K0-959-792.clb
   Part No SW: 8K0 959 792 B    HW: 8K0 959 792 
   Component: TSG BF        H10 0170  
   Revision:             Serial number: 0000007678956 
   Coding: 011C13204E00410001
   Shop #: WSC 06335 000 00000
   VCID: 3E792021A96C949

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (J540)       Labels: 8K0-907-801.clb
   Part No SW: 8K0 907 801 E    HW: 8K0 907 801 E
   Component: EPB Audi B8   H05 0060  
   Revision: 00000003    Serial number: 10000000093063
   Shop #: WSC 00000 000 00000
   VCID: 31630B1D68327B1

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range        Labels: 8K0-907-357.clb
   Part No: 8K0 907 357 B
   Component: Dynamische LWR  H01 0030  
   Revision: 00000001    Serial number:               
   Coding: 0000004
   Shop #: WSC 06334 000 00000
   VCID: 346D020957204E9

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels: 8K0-959-795.clb
   Part No SW: 8K0 959 795     HW: 8K0 959 795 
   Component: TSG HL        H06 0170  
   Revision:             Serial number: 0000007694211 
   Coding: 010C13204000210001
   Shop #: WSC 06335 000 00000
   VCID: FF079D256EE6DD1

No fault code found.

-------------------------------------------------------------------------------
Address 65: Tire Pressure (J502)       Labels: 8K0-907-273.clb
   Part No SW: 8K0 907 273 A    HW: 8K0 907 273 A
   Component: J502-RDK      H03 0250  
   Revision: 00001001    Serial number: 13140781711312
   Coding: 0CD154
   Shop #: WSC 06334 000 00000
   VCID: 30650E196338729

1 Fault Found:
02214 - Tire Pressure Warning 
            000 -  -  - MIL ON
             Freeze Frame:
                    Fault Status: 11100000
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 1
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:07:52

             Freeze Frame:
                        0.00
                    Bin. Bits: 00000000 10100101
                    Voltage: 13.10 V
                    Text:  14,5°C;  7,67bar;     n.erkannt      


-------------------------------------------------------------------------------
Address 67: Voice Control
Cannot be reached

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 4L0-910-441.clb
   Part No SW: 8T0 907 441 B    HW: 4L0 907 441 A
   Component: J772__Rearview      0070  
   Revision: --H12---    Serial number: 525PA8-J899020
   Coding: 1000007
   Shop #: WSC 06335 000 00000
   VCID: 377735054656A51

No fault code found.

-------------------------------------------------------------------------------
Address 6D: Trunk Elect. (J605)       Labels: Redir Fail!
   Part No SW: 8K9 827 851     HW: 8K9 827 851 
   Component: J605  Master  H24 0240  
   Revision: --------    Serial number: 8K9827851     
   VCID: FBFF69357AFEC11

   Subsystem 1 - Part No SW: 8K9 827 852     HW: 8K9 827 852 
   Component: J756  Slave  H24 0240 

1 Fault Found:
16347 - Control Module - EEPROM Error 
            014 - Defective
             Freeze Frame:
                    Fault Status: 01101110
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 1
                    Mileage: 232981 km
                    Time Indication: 0
                    Date: 2008.06.09
                    Time: 07:08:13


-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels: 8K0-959-794.clb
   Part No SW: 8K0 959 794     HW: 8K0 959 795 
   Component: TSG HR        H06 0170  
   Revision:             Serial number: 0000007481441 
   Coding: 010C13204000210001
   Shop #: WSC 06335 000 00000
   VCID: FEF9602169ECD49

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone
Cannot be reached

End   ---------------------------------------------------------------------

[Smac770]

Instrument cluster - Control Module Incorrectly Coded; you been playing with the coding on that?
What's up with the parking sensors module (J446 at address 10)? Is it unplugged?
Nav, J401, cannot be reached.
J605, eeprom error? The J605 and J756 are the two modules that include the motors that raise and lower the rear lid. Does your rear lid open and close fine?
The whole left rear stack seems unpowered, J525 amp, R radio, J401 DVD Nav, sat radio. All of that and the amp fuses are in row 3 (C), fuses 3 (7.5A) and 4 (30A). Make sure they are not blown.
0E is your in-dash CD changer, 1E is your AMI port in the glovebox. Likely inaccessible because the optical bus is down. They do not have CAN connections in addition to the MOST connection, unlike the R and J525 which are on CAN.
control head, your E380 MMI controls, is it not working?

The G238 air quality sensor should be in the air box in the plenum chamber going down to the HVAC fan. It's on a LIN bus with the G395. You should see if it's plugged in, and see if there's a problem with the fuse 5 in row 1 of the panel on the left end of the dash.

I assume you've tried to code out the TPMS system and that's why the Gateway and Instrument Cluster are currently pissed at the coding?

[ashrafnisar]

J525 is the outboard sound processor/amplifier. These terms are generic, not specific. Ie, your part number for your J525 will vary depending on your installed equipment. The plugs on your J525 will vary depending on your part number. So B&O, non-B&O, if you have an amp in the rear left, it's the J525 from a wiring and system perspective. MMI 3G has the amplifier integrated into the radio R for non-B&O; in that configuration, I don't know if the radio R appears on the gateway list as two devices (R and J525) or just as an R, but that's not relevant to your MMI 2G scenario.

Very helpful. I appreciate the rundown and I hope I can pass this onto someone else in need down the line.

In related news, I took apart the amp and spent some time cleaning. I didn't see anything that looked blown/burnt except for one tiny "don't know what it's called". Should have taken pictures.....

Reassembled and dropped the amp back in the car and voila, SOUND!

So far, I know the drivers for lows (speakers in door) and tweeters (sideview mirror panel) aren't firing but everything else seems to be working.

I'm going to scan again tomorrow, check the cables passing from body to door and hopefully pop off the panels to double check everything is plugged in and that the speakers themselves aren't shot. Given that both of them aren't playing, I suspect it's not the speakers themselves but it seems like an easy thing to check before shelling out for amp repair/replacement.

As far as the leak goes, I'm fairly confident it was from the grommet that holds the rubber trunk stop. Sealed it off with some RTV and waiting for it to cure so I can water test again. The stack is currently covered with a garbage bag so nothing can leak in.

Sent from my SM-N975W using Tapatalk

[streamline]

My Bose amp went last year, i got a replacement and had the dealer recode for the hw protection. In the process of them recoding the amp the airbag module went out and had them replace that as well. Following that everything seemed to work except i lost radio reception. Fast fwd a year later I brought car back to dealer for inspection, picked it up, and a day later the MMI when dark. I went searching for fuses and noticed the rear compartments in were soaking wet. I keep the car in garage but at dealer the car was out in rain for a 4 days. I have a spare amp and tried to swap that out, but did not make a difference. I did try to disable the TPMS b/c with MMI out i can reset them and the alerts every start was annoying, but wasnt able to do that successful. That is the only things i have done.

Instrument cluster - Control Module Incorrectly Coded; you been playing with the coding on that? Besides TPMS and reseting service interval havent done any coding
What's up with the parking sensors module (J446 at address 10)? Is it unplugged?I havent unplugged, will have to search where that is located
Nav, J401, cannot be reached.
J605, eeprom error? The J605 and J756 are the two modules that include the motors that raise and lower the rear lid. Does your rear lid open and close fine?Rear deck operates fine
The whole left rear stack seems unpowered, J525 amp, R radio, J401 DVD Nav, sat radio. All of that and the amp fuses are in row 3 (C), fuses 3 (7.5A) and 4 (30A). Make sure they are not blown.I have check these and are not blown
0E is your in-dash CD changer, 1E is your AMI port in the glovebox. Likely inaccessible because the optical bus is down. They do not have CAN connections in addition to the MOST connection, unlike the R and J525 which are on CAN.
control head, your E380 MMI controls, is it not working?I am able to initiate a reset, but besides that MMI controls are not responsive

The G238 air quality sensor should be in the air box in the plenum chamber going down to the HVAC fan. It's on a LIN bus with the G395. You should see if it's plugged in, and see if there's a problem with the fuse 5 in row 1 of the panel on the left end of the dash.

I assume you've tried to code out the TPMS system and that's why the Gateway and Instrument Cluster are currently pissed at the coding?I have not sure how to get this back?

[Smac770]

currently covered with a garbage bag

Just make sure the bag is up high over the amp, not on the amp. :-) Those electronics get hot and require air flow.

[Smac770]

Streamline,

TPMS - I would have hoped you would have copied down the original long coding on your gateway and instrument cluster so they could be put back in the event of a problem. Then again, it may simply be because you didn't unplug the TPMS module, as we still get diagnostic access to it. You have to unplug that thing as part of the process. The J502 TPMS is powered by the 5A fuse 1 in row 2 (B) in the right rear. Go pull that fuse.

G238 - did you check this sensor? You can't miss it on the mesh intake under the right end of the plenum chamber

E380 - if your MMI controls are not functioning, it's more likely that what they control is currently inaccessible, which is pretty much everything since the MOST infotainment bus is down

J446 - this is down low in that same space as the fuse block in the right rear; it's run by the 5A fuse 5 in row 4 (D) of fuse panel F (the block in the right rear). It doesn't make much sense for this to be involved with all the other mess you have going on, unless the module is actually not working. Should have three sockets on one end of it, but only two plugs should be installed.

When you're checking these fuses, you're checking that 12v is present on both sides of the fuse (I think the J446 fuse is term 15, so ignition will have to be on for 12v to be present)?

left rear stack, J525, R, J401, R146 - this is the amp, radio, navigation, sat radio stack in the back left. It would seem water has taken out at least one device in this stack. This is breaking the optical bus. Normal problem isolation process here. Pull the optical plug off the amp, do you see a red light on one half? That should be the MOST signal from the front of the car. Then it goes amp->radio->nav->sat->back to front of car. With one of those devices down, the device is not forwarding the MOST bus content. You'll have to pull the stack to get any access to the plugs. But with the car on, I imagine if you pull the optical plug off the stack devices 1 by 1, one of them will be entirely dark. Which means there's no light coming from the previous (higher up) device. But it could be the whole stack is fried too. You could try by simply taking the optical plug from the J525 and plugging it into the plug on the radio, thus bypassing the J525. Or if you know the J401 navigation is functional (do you see the lights on it come on?), then put the J525 optical plug into the J401, bypassing the J525 and the R radio. Essentially, you need to get the red light going back to the front of the car. And then fix whatever is broken in that corner, after fixing whatever your water leak issue is.

https://youtu.be/JnrvH20SYmg
43s, notice the blinking red light on 1, that's from the upstream device. 2 is the path to the downstream device.

[streamline]

Smac770,

TPMS - Unfortunately I did not copy down the initial long coding when attempting the TPMS disable, when i followed the procedure on here it wasnt successful so i reversed the process and plugged the fuse back in. Is it possible to get the long code back?

G238 - I will check this tonght

J446 - will also check this tonight

Left stack - I did have the full stack out but did not follow the optical for each. I did notice when swapping out the amp that the optical was visible there, but will try to trace those as well tonight.

Thank you for this help, much appreciated!

[Smac770]

TPMS, all you should have been doing was unchecking a checkbox in each module. So I would just recheck that checkbox and recode, hope it clears up. The long coding is recorded in any scan, so if you have a scan from before you started messing with it, you have the coding there. You're probably not even coding the gateway, just modifying its installed modules list (which it clearly knows is wrong because you have the J502 powered and so it's present on the CAN bus). Your code for gateway is the same as mine, 000303. But your instrument cluster coding differs on two characters from mine.

yours originally - no idea, find an old scan
yours current - 831611000200D705020000
mine - 8B1611000300D705020000

[rand0mher0]

Unhelpful right now but I am parting out my 09 avant with the MMI 2G High, so if you find out whatever's blown up. I have a replacement to sell you! Lol

[ashrafnisar]

Smac770,

Does VCDS not identify what the value is increased/decreased by when toggling the option for TPMS? I'm wondering if me pulling my code would be beneficial at all to the OP?

Regarding the temp solution (i.e. the bag) - I've got it fairly high and taped to the inside of the rear quarter. I also left the flap open to minimize any breathing issues. Can you chime in on whether there's anything else that may be causing the front mid's and high's to not be active? I have a sinking feeling that it's the amp but I want to cover every base before committing to the repair. Being in Canada doesn't help as the cost of repair via Paulison Corp (after conversion) is over $500.

Yet another useful tidbit from you - the stack passes the optical signal from top to bottom. I did not know that for a fact so I had arbitrarily decided to start at the bottom - doing that was unnerving because I had no signal at each module until I arrived at the amp

[Smac770]

As to stream's instruments coding, he has -8 (bit 3) in the first byte (byte 0) and -1 (bit 0) in the fifth byte (byte 4). So he disabled the seat belt warning (no idea why one would do this) and he disabled the TPMS awareness. But who knows which change the module is unhappy with. Don't know if he has sufficient scans before and after any changes to know the cascade effect of things he's attempted.

If you have the B&O amp, that means you have three speakers in the front left and the front right. The door midbass driver is on one amp channel, and the door tweeter and the dash midrange are on another amp channel. So if the tweeter and midrange are not working, you look at the amp channel. But if the tweeter and midbass are not working, the common there is that the wiring has to pass through the body to door wiring plug. So you're probably looking at the amp channel. But it's the same for left and right? The front midbass drivers, the rear left and right speakers (3 each also), and the dash center channel and subwoofer are all working fine?

Yeah, the wiring diagram document shows the routing of the optical cabling logically (device to device order), but not physically (so can't say exactly where the cable lies in the car).

[streamline]

From a prior scan:

Address 17: Instruments (J285)       Labels: 8T0-920-xxx-17.clb
   Part No SW: 8K0 920 980 A    HW: 8K0 920 980 A
   Component: KOMBIINSTR.   H17 0224  
   Revision: 00100000    Serial number: 9E1745C98     
   Coding: 831611000300D705020000
   Shop #: WSC 59312 001 10485
   VCID: 30650E196338729

No fault code found.

[streamline]

old - 831611000300D705020000
current - 831611000200D705020000
Smac770 - 8B1611000300D705020000

Smac770, do you have your TPMS disabled?

[Smac770]

No, just like your prior scan, the 5th byte (byte 04) is 03.

[streamline]

Made some progress today.

1) Went back to old coding and Instrument fault is now gone.

2) Optical loop bypass arrived in mail yesterday. I went through left stack and found the Radio/Tuner Receiver (4F0035541N) being the problematic module. With the bypass loop in place of the module the MMI is back up. No sound is coming out of the CD player, but battery is low so hoping that might be the issue. Car is on charger now and will try later to see if sound comes back. Does anyone know if the Radio/Tuner Receiver is removed could that cause elimination of sound?

@rand0mher0 , do you have a Radio/Tuner Receiver (4F0035541N) available for sale?

[Smac770]

I would not expect the absence of the radio tuner on the MOST bus to impact playback of other source devices. Possibly the low battery voltage had kicked in energy management and disabled entertainment output. You have the scan tool, what's it say.

Did you test the 8-pin plug that goes into the radio? Pin 1 should be ground, pin 2 should be 12v. If 12v is present across those pins, then it would seem your radio unit has simply died for whatever reason.

[streamline]

I did test the 8 pin plug and it is getting 12V, so looks like the radio unit is toast, i swapped out the amp for my spare and I now have sound. Only problem it only comes out drivers side so need to remove component protection coded. Is dealer only place that can do this?

So i am definitely getting water on left and right sides, most likely the culprit of killing radio module and B&O amp. So need to figure how that is happening too.

[Smac770]

Yeah, CP in effect for the J525 is only front left output is active. Dealership is the easiest way to deal with it.

I'd be checking those rear sunroof drains, and if not those, then probably something to do with the hatch/body seal. The seal of the rear windows and rear lid window are possible too, but wouldn't be my first suspicion.