C6 2007 - MMI dead

[milbo1990]

Hi all,

New here, so please be gentle!

For the first time in my life, I’ve bought an Audi - so I’ve got lots to learn :)

I’ve bought a 2007 C6 Avant with a dead MMI. There appears to be water in the tailgate, and I did read somewhere (before I purchased) that a common fault is for the rear washer to leak and take out the MMI - so I’m hoping that’s the problem!

The screen inside is completely dead and the buttons on the console are non-responsive. Other dashboard controls are functional, so I think the issue is solely with the MMI.

Can anyone help me out with the location of the MMI module and how I can go about testing/replacing?

Thanks in advance!

[Crasher]

The front information display and operating unit control unit -J523- is behind the glovebox, it is powered from fuse 10 in the left side dash fuse board

[milbo1990]

Ok, so likely not related to the washer fluid leak in the tailgate?

[Scott K]

Water in the tailgate is usually a pipe connection. Take off the trim and you should see the issue.

[milbo1990]

Ok, I’ve followed this guide (Audi: MMI Problems Diagnostic | Audiworld (https://www.audiworld.com/how-tos/a/audi-mmi-problems-diagnostic-423457)) and can’t pin point the issue down to any single module.

The guide ends by saying that the fault is likely the ‘main MMI module’ but it doesn’t explain where this is. Can anyone help? I’m assuming it’s behind the glovebox, but there’s a few modules back there and none of them (apart from the little black Temic one) appear to habe fibre going to them. I just want to get it off so that I can retrieve the part number.

[milbo1990]

Also, would VCDS help pin point the cause of the problem?

[Crasher]

Yes it is behind the glovebox, have you checked the fuse? I have seen the radio unit in the boot get wet and blow the fuse but I would have to check the specific diagram against your VIN as there are variations due to date and equipment

[milbo1990]

Thanks for your reply. Yes, I’ve checked all the fuses in the passenger side of the dash and the boot and I’ve checked that all of the modules are recieving power, except for the control panel - so that’s my next step. I can’t actually find a radio module with a fuse in the back of it anywhere. I’ve checked in the boot sides, behind the dash and under the seats. Anywhere else??

[Crasher]

A cording to elsaWin it is behind the glovebox, PM me the reg or post the VIN and I will double check at work tomorrow.

[milbo1990]

Thanks, really appreciate that.

My VIN is WAUZZZ4F58N042353

[Crasher]

It is shown as being behind the glovebox and will have one of these part numbers

4F0910729_/_X
4F0910729Q/QX
4F0910730D/DX
4F0910730B
4F0910731_/_X
4F091073F/FX
4F0910731D/DX
4F0910731L/LX
4F0910731J/JX
4F0910731R/RX
4F0910732A/AX
4F0910732D

All replaced by 4F0 910 732 HX

https://5.allegroimg.com/original/019fd8/030580ab474d8bc4a09bd66bc235

[milbo1990]

Fantastic, got it - thank you. It was more tucked away than I expected.

I know that this is a common issue. Do people tend to replace them with 4F0 910 732 HX?

I’ve looked online and direct replacements seem to be plentiful and cheap. I understand that I meed to get the same SW prefix and complications with component protection.

I can’t seem to find anyone who sells refurbished/warrantied items, so I’m guessing it might be a bit of a lottery now to replace it.

[milbo1990]

Ok, so I’ve bought VCDS and a ross-tech cable.

Plugging it in and doing a scan of the optical bus diagnostics, I get faults for:

19-CAN gateway
07-Control head
0E-Media Player
77-Telephone
47-Sound System
56-Radio
37-Navigation

When I go into each of the controllers to retrieve the fault code, I just get an error message saying ‘no response from controller’

Any ideas?

[Crasher]

Could you do a full scan and post it?

[milbo1990]

Thanks for your ongoing help Crasher, I really appreciate it.

I've bought VCDS and a ross-tech cable on a netbook which won't connect to the internet - no idea why! So, I'm typing it out :aargh4:

I've just done a summary - but none of the codes appeared to be recent and I don't have any MIL's on currently either. Do let me know if you want any of the freeze frame or part number info for any of the codes or modules.

Thanks again!


00-Steering Angle Sensor -- Status: OK 0000
01 - Engine -- Status: Malfunction 0010
02 - Auto Trans -- Status: OK 0000
03 - ABS Brake -- Status: Malfunction 0010
05 - Acc/Start Auth. -- Status: OK 0000
07 - Control Head -- Status: Cannot be reached 1100
08 - Auto HVAC -- Status: OK 0000
09 - Cent. Elect. -- Status: Malfunction 0010
0E - Media Player 1 -- Status: Cannot be reached 1100
15 - Airbags -- Status: Malfunction 0010
16 - Steering Wheel -- Status: Malfunction 0010
17 - Instruments -- Status: OK 0000
19 - CAN Gateway -- Status: Malfunction 0010
37 - Navigations -- Status: Cannot be reached 1100
42 - Door Elect, Driver -- Status: OK 0000
46 - Central Conv. -- Status: Malfunction 0010
47 - Sound System -- Status: Cannot be reached 1100
4F - Centr. Electr. II -- Status: Malfunction 0010
52 - Door Elect, Pass. -- Status: OK 0000
53 - Parking Brake -- Status: Malfunction 0010
56 - Radio -- Status: Cannot be reached 1100
61 - Battery Regul. -- Status: Malfunction 0010
62 - Door, Rear Left -- Status: OK 0000
72 - Door, Rear Right -- Status: OK 0000
76 - Park Assist -- Status: OK 0000

----------------------------------------------------------------------
Address 01: Engine
2 Faults Found:
005491 - Left Engine Mount Solenoid Valve (N144)
P1573 - 001 - Open Circuit

005715 - Please check DTC Memory of ABS Controller
P1653 - 002 - Intermittent

----------------------------------------------------------------------
Address 03: ABS Brakes
2 Faults Found:
01826 - Sensor for steering angle (g85): Supply Voltage Terminal 30
000 - - -Intermittent

00473 - Control Module for Elect. Park/Hand Brake (J540)
013 - Check DTC Memory - Intermittent

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

-------------------------------------------------------------------------------------
Address 09: Cent. Elect
1 Fault Found:
00924 - Relay for headlamp cleaning System (J39)
0014 - Defective - Intermittent

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

---------------------------------------------------------------------------------------
Address 15: Airbags
3 Faults Found:
02095 - Component Protection Active
000 - - - Intermittent - MIL ON
01228 - Airbag Cut Off Switch for Passenger Side (E224)
010 - Open or short to Plus - Intermittent - MIL ON
02756 - Redundant signal path of Airbag cut off switch - front passenger side (E224)
010 - Open or short to Plus - Intermittent - MIL ON

----------------------------------------------------------------------------------------
Address 16: Steering wheel
2 Faults Found:
00446 - Function Limitation due to under-voltage
002 - Lower limit exceeded - Intermittent
00532 - Supply Voltage B+
002 - Lower limit exceeded - Intermittent

----------------------------------------------------------------------
Address 19: CAN Gateway
00384 - Optical Databus
011 - Open Circuit
Freeze Frame:
Fault Status: 01101011
Fault Priority: 5
Fault Frequency: 1
Reset Counter: 243
Mileage: 222557km
Time Indication: 0
Date: 2007.05.16
Time: 12:00:13

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

-----------------------------------------------------------------
Address 46: Central Conv.
1 Fault Found
01565 - Luggage Compartment Light (w3)
009 - Open or short to ground - intermittent

---------------------------------------------------------------------
Address 4F: Centr. Electr. II
1 Fault Found
02752 - Glovebox Unlocking Motor (V327)
010 - Open or short to plus - Intermittent

---------------------------------------------------------------------
Address 53 - Parking Brake
1 Fault Found:
02443 - Control Head
012 - Electrical fault in circuit - Intermittent

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

----------------------------------------------------------------------
Address 61: Battery Regul.
5 Faults Found
02272 - Quiescent Current Stage 1
000 - - - Intermittent
02273 - Quiescent Current Stage 2
000 - - - Intermittent
02276 - Quiescent Current Stage 5
000 - - - Intermittent
02277 - Quiescent Current Stage 6
000 - - - Intermittent
02256 - Quiescent Current
001 - Upper Limit Exceeded - Intermittent

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

[Crasher]

Please don't cut the VIN out of the scan, it is useful and not subject to GDPR, remove the reg if you wish as that is personal data. What is the VIN. Do a full clear and run the car for a few days and do another full scan and post it in full.

[milbo1990]

Please don't cut the VIN out of the scan, it is useful and not subject to GDPR, remove the reg if you wish as that is personal data. What is the VIN. Do a full clear and run the car for a few days and do another full scan and post it in full.

Sorry - I've not intentionally cut anything out, I can't copy and paste the scan, so I've typed out the elements which I thought were useful. If there's anything particularly helpful missing, then please let me know.

I'll do another scan in a few days and post again.

The VIN is WAUZZZ4F58N042353

Thanks :D

[Crasher]

The way I do it is to install a generic text only virtual printer and then print the report and click print as text but you can also use the save function and open the file in Word. I realised I already had the VIN, too many irons in the fire.

[milbo1990]

Ok, so I reset my codes and I’ve driven the car around for 4 days since. All of the codes have now cleared except for two:

005491 - Left Engine Mount Solenoid Valve (N144) P1573 - 001 - Open Circuit

00384 - Optical Databus 011 - Open Circuit

I am still getting “Cannot be reached” for:
07-Control Head
0E-Media Player
37-Navigation
47-Sound System
56-Radio
77-Telephone

The OBD scan for that module just returns ‘Error’ for electrical and optical for all of the modules.

[Crasher]

All those not reached are on the infotainment bus and the optical bus is shown as being open, I can't look at the workshop info at the moment as my copy died and I am waiting for a new one. The engine mount is easy.