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MMI fault - Sound System Fuse - CAN - Optical Errors

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MMI fault - Sound System Fuse - CAN - Optical Errors

 
Old 04-08-2013, 03:35 AM
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Default MMI fault - Sound System Fuse - CAN - Optical Errors

Hi

I was travelling along a few days ago when the radio switched off along with all MMI functions

I reset but nothing.

When you switch the ON/OFF button on the MMI screen switches on briefly then goes off.

VCDS performed shows the system functions cannot be reached.

Optical BUS diagnostics showed an electrical error on the 47-sound system along with 2 optical errors on the CAN gateway and the sound system.

I checked all fuses and found the top most fuse (30AMP) dead in the left side boot/trunk where the NAV unit lives. Replaced and keep blowing so i assume this is the effect causing the MMI to stop.

Any ideas on the cause of the blowing fuse? No apparent wetness around but I suppose, living in the UK, it has been damp for months over the winter....

Any tips on what to approach next?

Thanks






Sunday,07,April,2013,12:22:53:27992
VCDS Version: Release 11.11.5
Data version: 20121222



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 4L0
Scan: 01 02 03 05 06 08 09 0E 15 16 17 18 19 28 34 36 38 42 46 47
4F 52 53 55 56 57 5F 61 62 6C 72 76

VIN: WAUZZZ4E89N011218 Mileage: 141640km/88011miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
05-Acc/Start Auth. -- Status: Malfunction 0010
06-Seat Mem. Pass -- Status: Malfunction 0010
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- Status: Cannot be reached 1100
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
18-Aux. Heat -- Status: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
28-HVAC, Rear -- Status: OK 0000
34-Level Control -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
38-Roof Electronics -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: Cannot be reached 1100
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Xenon Range -- Status: Malfunction 0010
56-Radio -- Status: Cannot be reached 1100
57-TV Tuner -- Status: Cannot be reached 1100
5F-Information Electr. -- Status: Cannot be reached 1100
61-Battery Regul. -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000







Control Module Part Number: 4L0 910 468 A
Component and/or Version: J533__Gateway H06 0071

Optical Bus Diagnostic : Standard

Controller Electrical Optical
19-CAN Gateway OK ERROR
0E-Media Player 1 OK OK
47-Sound System ERROR ERROR
56-Radio OK OK
57-TV Tuner OK OK

************************************************** **********
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Old 04-08-2013, 07:22 AM
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Hello,
That fuse looks to be for the
Control Module for Digital Sound Package (J525) ...


photo from PaulW post


Originally Posted by Tuizner View Post

I checked all fuses and found the top most fuse (30AMP) dead in the left side boot/trunk where the NAV unit lives. Replaced and keep blowing so i assume this is the effect causing the MMI to stop.
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Old 04-08-2013, 08:58 AM
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888
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Old 04-08-2013, 09:11 AM
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All this + TV + navigation + always fresh maps + texting + phone + games + camera + + + ... is in my phone and fits in my small pocket. This guys are in the stone age. Prices of their way outdated technology are outrageous and we are still happy about that. Something is weird here.
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Old 04-08-2013, 11:58 AM
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Thanks

Yes it seems to be the BOSE unit

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>
[IMG][/IMG]



I took it out and then took it apart - nothing noticeably untoward:


[IMG][/IMG]
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Old 04-08-2013, 01:31 PM
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Measure resistance between Power and Ground to make sure there's no short. Check those electrolytic can capacitors.
If the fuse keeps blowing up, it's the power short on the device that causes the problem.

Cheers,

Louis
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Old 04-09-2013, 01:58 AM
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Originally Posted by ltooz_a6_a8_q7 View Post
Measure resistance between Power and Ground to make sure there's no short. Check those electrolytic can capacitors.
If the fuse keeps blowing up, it's the power short on the device that causes the problem.

Cheers,

Louis


Thanks Louis

Yes it looks to be a short. I get no resistance between the two large pins on the board (1 and 2). I cant see any issues on the board. Is there a workaround or is it new board time?


[IMG][/IMG]


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Old 05-09-2013, 05:16 AM
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So I got the board fixed by svt services in Edinburgh.

Figured out the problem - charged the battery whilst in the vehicle and it must have blown the transistors on the amp board That's the first and last time I charge a battery whilst connected in a car - dont know why Audi say to do that in the owners manual..grrrrr...

Anyhoo - SVT have replaced the output modules and the polarity diode.

Now I have it back but I think it needs coding on VCDS. The MMI works again but no sound - just loud static on some speakers. I think it needs recoding -anyone know the correct codes? Rosstech just says 00000013 I think but when I enter that it says incorrect.....

I am thinking that maybe the repair wasnt quite right and this may have affected the outcome...

Output below


Address 47: Sound System
Control Module Part Number: 4E0 035 223 N
Component and/or Version: BOSE G3 D3 H01 0100
Software Coding: 0F000000
Work Shop Code: WSC 02399
VCID: 26434836518A55287B0

Advanced Identification
Serial number: 00000000001598
Identification: BGE-001
Revision: AF001000
Date: 01.10.08
Manufacturer number: 0301
Test stand number: 5369
Flash Status
Software
MOST Net: 01.0A.0A
TP 2.0: 02.04.05
Unknown: 02.02.02
Theft prot.: 02.02.00
Misc.
Hardware number: 4E0 035 223 N
Workshop System Name: J525
VCDS Info:
Labels: REDIR FAIL!

Tuesday,07,May,2013,14:11:06:27992
VCDS Version: Release 11.11.5
Data version: 20121222



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Address 47: Sound System
Control Module Part Number: 4E0 035 223 N
Component and/or Version: BOSE G3 D3 H01 0100
Software Coding: 0F000000
Work Shop Code: WSC 02399
VCID: 26434836518A55287B0

Advanced Identification
Serial number:
Identification:
Revision: AF001???
Date:
Manufacturer number:
Test stand number:
Flash Status
Software
MOST Net: 01.0A.0A
TP 2.0: 02.04.05
Unknown: 02.02.02
Theft prot.: 02.02.00
Misc.
Hardware number: 4E0 035 223 N
Workshop System Name: J525
VCDS Info:
Labels: REDIR FAIL!
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Old 05-09-2013, 06:51 AM
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If you look at the pins out, the connector only shows speakers connections - If this is the amplifier, then there must be inputs and outputs - inputs go in but don't get amplified - nothing out? Or the input circuits are fried - For the power to be dead - amplifier circuit(s) must be blown - More to do.

Cheers,

Louis
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Old 08-06-2016, 01:31 AM
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Originally Posted by ltooz_a6_a8_q7 View Post
If you look at the pins out, the connector only shows speakers connections - If this is the amplifier, then there must be inputs and outputs - inputs go in but don't get amplified - nothing out? Or the input circuits are fried - For the power to be dead - amplifier circuit(s) must be blown - More to do.

Cheers,

Louis
Hello there,

I have got the exactly the same problem, did you replace the bose amp to resolve? Audi come back with a 1400 fix??? Bless them they cleaned the car to soften the blow though!

Many thanks,

Neil
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