2008 Q7 Sound System Optical Error

   #1  

praxeum

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C?ID=306291
I have been lurking on these forums for a couple years and usually find what I need without posting. But this time I have looked and have not found an answer to my specific question.

My wife drives a 2008 Q7, on Saturday when we got in to go somewhere the screen did not come on, nor did the buttons on the cd changer or the main mmi console light up and the part in between the gauges shows temperature/mileage/etc. but not anything to do with the stereo. There have been no previous mmi problems, it has never been intermittent. When I pushed the "On" button the MMI spash screen would come on for a couple seconds then go dark again. My first thought was water ingress and fried components. When we got home I looked in the back and everything was bone dry, no moisture and no signs of water that I could see. So I did a scan:

Code:
Saturday,12,May,2018,18:19:37:44948
VCDS Version: Release 18.2.0 (x64)
Control Module Part Number: 4L0 910 468 A
  Component and/or Version: J533__Gateway   H06 0060

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        		OK                  	OK                  
47-Sound System     		OK                  	ERROR               
56-Radio       		     	OK                  	OK                  
37-Navigation      	 	OK                  	OK                  
0F-Digital Radio(SAT)		OK                  	OK

Since everything is ok electrically can I assume it is not a water problem? Is the 47-Sound System controller a single part (like the CD Changer or the Amp) or is it multiple parts? Any suggestions on where I should start?

I did a complete scan and noticed even though some components said OK above, they did not appear ok in the full scan

Code:
Saturday,12,May,2018,18:23:58:44948
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.2.0.3 (x64)  HEX-V2 CB: 0.4411.4
Data version: 20180212 DS287.0
www.Ross-Tech.com


VIN: WA1BV74L88D028862   License Plate: 


Chassis Type: 4L (4L0)
Scan: 01 02 03 05 07 08 09 0E 0F 15 16 17 19 1E 28 36 37 3C 42 46
          47 4F 52 55 56 5C 61 62 65 69 6C 6D 6F 72 76 77

VIN: WA1BV74L88D028862   Mileage: 203060km-126175miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: Malfunction 0010
05-Acc/Start Auth. -- Status: Malfunction 0010
07-Control Head -- Status: Cannot be reached 1100
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- Status: Cannot be reached 1100
0F-Digital Radio -- Status: Cannot be reached 1100
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
1E-Media Player 2 -- Status: Cannot be reached 1100
28-HVAC, Rear -- Status: Malfunction 0010
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: Malfunction 0010
47-Sound System -- Status: Cannot be reached 1100
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
5C-Lane Maintain. -- Status: OK 0000
61-Battery Regul. -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: OK 0000
69-Trailer -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
6F-Centr. Conv. II -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000
77-Telephone -- Status: Cannot be reached 1100
-------------------------------------------------------------------------------
Address 01: Engine        Labels:. 079-907-560-BAR.clb
   Part No SW: 4L0 910 560 G    HW: 4L0 907 560 B
   Component: 4.2l V8/4V          0020  
   Revision: 78H02---    Serial number:               
   Coding: 01210009190F0960
   Shop #: WSC 31414 790 00001
   VCID: 2C020DC03A01CE27FE0-8078

1 Fault Found:
005241 - Brake Boost Vacuum System 
               P1479 - 008 - Mechanical Failure
             Freeze Frame:
                    Fault Status: 01101000
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 201646 km
                    Time Indication: 0
                    Date: 2018.04.17
                    Time: 17:42:36

             Freeze Frame:
                    RPM: 2121 /min
                    Load: 40.0 %
                    Speed: 26.0 km/h
                    Temperature: 39.0°C
                    Temperature: 11.0°C
                    Absolute Pres.: 900.0 mbar
                    Voltage: 13.081 V

Readiness: 0000 0000

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 09D-927-750.lbl
   Part No SW: 09D 927 750 GF    HW: 09D 927 750 GF
   Component: AL 750 6A           1072  
   Revision: 00H64000    Serial number:               
   Coding: 0000504
   Shop #: WSC 31414 790 00001
   VCID: 78AAE190BED9B2874A8-802C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels:. 4L0-910-517-V2.clb
   Part No SW: 4L0 910 517 B    HW: 4L0 614 517 D
   Component: ESP ALLRAD MK25E1   0010  
   Revision: 00H30001    
   Coding: 0082993
   Shop #: WSC 31414 790 00001
   VCID: 290CF4D435F3DB0F056-807C

1 Fault Found:
00668 - Supply Voltage Terminal 30 
            002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 2
                    Fault Frequency: 64
                    Reset counter: 193
                    Mileage: 188134 km
                    Time Indication: 0
                    Date: 2017.09.15
                    Time: 10:53:41

             Freeze Frame:
                    Count: 192
                    Count: 9025
                    Count: 128
                    Count: 38656


-------------------------------------------------------------------------------
Address 05: Acc/Start Auth.        Labels:. 4F0-910-852.clb
   Part No SW: 4F0 910 852     HW: 4F0 905 852 B
   Component: FBSAUDIC6 ELV   H31 0240  
   Revision: 07020801    Serial number: 10601500884583
   Coding: 0000135
   Shop #: WSC 22126 444 84533
   VCID: 6390A6FC175F415F0FA-8036

   Subsystem 1 - Part No: 4F0 910 132 L
   Component: FBSAUDIC6 EZS   H03 0020

   Subsystem 2 - Part No: 4F0 910 335 
   Component: FBSAUDIC6 KSG   H27 0080

2 Faults Found:
00193 - Rear Right Door Handle Touch Sensor (G418) 
            011 - Open Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00111000
                    Fault Priority: 3
                    Fault Frequency: 12
                    Reset counter: 160
                    Mileage: 198491 km
                    Time Indication: 0
                    Date: 2018.03.24
                    Time: 10:20:43

00193 - Rear Right Door Handle Touch Sensor (G418) 
            008 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00111011
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 162
                    Mileage: 201714 km
                    Time Indication: 0
                    Date: 2018.04.19
                    Time: 11:08:58


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

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: None
   Part No SW: 4L0 910 043     HW: 4L0 820 043 F
   Component: KLIMABETAETIGUNGH05 0060  
   Revision: 00---012    Serial number: 00000030064322
   Coding: 0655400
   Shop #: WSC 31414 790 00001
   VCID: 619CACF40D43534F1D6-8034

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 4F0-910-279.lbl
   Part No SW: 4F0 910 279 J    HW: 4F0 907 279 A
   Component: ILM Fahrer      H18 0250  
   Revision: 00000000    Serial number: 4F0907279     
   Coding: 0114123
   Shop #: WSC 31414 790 00001
   VCID: 303A19B01629AAC7C28-8064

   Subsystem 1 - Part No: 4L1 910 113   Labels: 1KX-955-119.CLB
   Component: Wischer AU716   H14 0100  
   Coding: 00064792
   Shop #: WSC 31414  

   Subsystem 2 - Part No: 4E0 910 557 B  Labels: 8K0-955-559.CLB
   Component: REGENLICHTSENSORH13 0100  
   Coding: 00150059
   Shop #: WSC 31414  

No fault code found.

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

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

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 4L0-910-655.lbl
   Part No SW: 4L0 910 655 A    HW: 4L0 959 655 B
   Component: 73 AIRBAG AUDI8RH42 0230  
   Revision: 06H42000    Serial number: 0038QD075Z6H  
   Coding: 0014131
   Shop #: WSC 31414 790 00001
   VCID: 2B000EDC3F0FC91FF7A-807E

   Subsystem 1 - Part No: 4L0 910 339 A
   Component: BF-Gewichtsens. H03 0030

   Subsystem 2 - Serial number: 6332QSME44411225+

   Subsystem 3 - Serial number: 6342QSME44583C2DR

   Subsystem 4 - Serial number: 6352QSME4451273BE

   Subsystem 5 - Serial number: 6362QSME3E71381FU

   Subsystem 6 - Serial number: 63734SME3873794FE

   Subsystem 7 - Serial number: 63834SME3B173129$

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 4F0-910-549.lbl
   Part No SW: 4F0 910 549 A    HW: 4F0 953 549 D
   Component: J0527               0410  
   Revision: 00H03000    Serial number: 90026072620637
   Coding: 0032042
   Shop #: WSC 31414 790 00001
   VCID: 2708F2EC23E7ED7F132-8072

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H01 0030

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 4L0-910-xxx-17.lbl
   Part No SW: 4F0 910 930 C    HW: 4L0 920 981 
   Component: KOMBIINSTR. M73 H21 0240  
   Revision: 00700000    Serial number: 73K53K7A7     
   Coding: 3665288
   Shop #: WSC 22125 444 54084
   VCID: 2310E6FC57DF015F4FA-8076

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 4L0-910-468.clb
   Part No SW: 4L0 910 468 A    HW: 4L0 907 468 C
   Component: J533__Gateway   H06 0060  
   Revision: 00H06000    Serial number: 1000D078038126
   Coding: F7F7FE77763A0200
   Shop #: WSC 31414 790 00001
   VCID: 2D0400C4011BC72FE9E-8078

3 Faults Found:
02095 - Component Protection Active 
            000 -  -  - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 165
                    Mileage: 202002 km
                    Time Indication: 0
                    Date: 2018.04.27
                    Time: 15:58:30

00463 - Control Module for Digital Sound Package (J525) 
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 3
                    Fault Frequency: 2
                    Reset counter: 194
                    Mileage: 203008 km
                    Time Indication: 0
                    Date: 2018.05.11
                    Time: 11:58:54

00384 - Optical Databus 
            011 - Open Circuit
             Freeze Frame:
                    Fault Status: 01101011
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 157
                    Mileage: 203022 km
                    Time Indication: 0
                    Date: 2018.05.12
                    Time: 13:48:55


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

-------------------------------------------------------------------------------
Address 28: HVAC, Rear        Labels: None
   Part No SW: 4L0 910 158     HW: 4L0 919 158 C
   Component: KLIMABETAETIGUNGH05 0060  
   Revision: 00---009    Serial number: 00000000134962
   Coding: 0000006
   Shop #: WSC 31414 790 00001
   VCID: 688AB1D0EE792207DA8-803C

1 Fault Found:
00003 - Control Module 
            003 - Mechanical Failure - Intermittent
             Freeze Frame:
                    Fault Status: 00100011
                    Fault Priority: 2
                    Fault Frequency: 7
                    Reset counter: 255
                    Mileage: 177832 km
                    Time Indication: 0
                    Date: 2017.05.06
                    Time: 15:14:25


-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr        Labels: None
   Part No SW: 4F0 910 760     HW: 4L0 959 760 
   Component: Sitzmemory FS   H01 0100  
   Revision: 00000000    Serial number: 00000000896401
   Coding: 0082954
   Shop #: WSC 31414 790 00001
   VCID: 619CACF40D43534F1D6-8034

No fault code found.

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

-------------------------------------------------------------------------------
Address 3C: Lane Change        Labels: None
   Part No SW: 4L0 910 566 B    HW: 4L0 907 566 A
   Component: J0769_SWA_MasterH12 0130  
   Revision: 00H12000    Serial number: 6PZ 009 014-00
   Coding: 0010001
   Shop #: WSC 03806 002 1048576
   VCID: 2D0400C4011BC72FE9E-8078

   Subsystem 1 - Part No: 4L0 910 568 B
   Component: J0770_SWA_Slave_H10 0130

   Subsystem 2 - Serial number: 6PZ 009 014-20

   Subsystem 3 - Serial number: 3F23.02.1600H10000AMS14145ÿ

   Subsystem 4 - Serial number: S14145ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 4L0-910-793-42.lbl
   Part No SW: 4L0 910 793 B    HW: 4L0 959 793 B
   Component: TSG FA          H12 0150  
   Revision: 00-00000    
   Coding: 0051915
   Shop #: WSC 31414 790 00001
   VCID: 2F381ACC0B17B53FDB2-807A

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 4L0-910-289.lbl
   Part No SW: 4L0 910 289 F    HW: 4L0 907 289 C
   Component: Komfortgeraet   H07 0050  
   Revision: 0050 ---    Serial number: 01060656830000
   Coding: 7632925
   Shop #: WSC 31414 790 00001
   VCID: 333016BCE73F91DFBFA-8066

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

2 Faults Found:
03073 - Rear Lid Closed Sensor 1 
            008 - Implausible Signal - Intermittent
             Freeze Frame:
                    Fault Status: 00101000
                    Fault Priority: 5
                    Fault Frequency: 87
                    Reset counter: 193
                    Mileage: 196182 km
                    Time Indication: 0
                    Date: 2018.03.20
                    Time: 21:28:06

01134 - Alarm Horn (H12) 
            012 - Electrical Fault in Circuit
             Freeze Frame:
                    Fault Status: 01101100
                    Fault Priority: 3
                    Fault Frequency: 254
                    Reset counter: 159
                    Mileage: 169461 km
                    Time Indication: 0
                    Date: 2016.12.10
                    Time: 08:56:21


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

-------------------------------------------------------------------------------
Address 4F: Centr. Electr. II        Labels: 4F0-910-280.lbl
   Part No SW: 4F0 910 280     HW: 4F0 907 280 D
   Component: ILM Beifahrer   H12 0100  
   Revision:             Serial number: 00000000012355
   Coding: 0012001
   Shop #: WSC 31414 790 00001
   VCID: 5EE697083C3D6CB7204-800A

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels: 4L0-910-793-52.lbl
   Part No SW: 4L0 910 793 B    HW: 4L0 959 792 B
   Component: TSG BF          H12 0150  
   Revision: 00-00000    
   Coding: 0051915
   Shop #: WSC 31414 790 00001
   VCID: 2F381ACC0B17B53FDB2-807A

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range        Labels: 4F0-910-357.lbl
   Part No SW: 4F0 910 357 F    HW: 4F0 907 357 F
   Component: AFS 1           H01 0020  
   Revision: 00000001    Serial number:               
   Coding: 0000021
   Shop #: WSC 31414 790 00001
   VCID: 290CF4D435F3DB0F056-807C

   Subsystem 1 - Part No: 7L6 941 329 A
   Component: AFS-Modul links H06 0002

   Subsystem 2 - Part No: 7L6 941 329 A
   Component: AFS-Modul rechtsH06 0002

No fault code found.

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

-------------------------------------------------------------------------------
Address 5C: Lane Maintain.        Labels: None
   Part No SW: 4E0 910 217 C    HW: 4E0 907 217 C
   Component: J759  LDW       H06 0070  
   Revision: 00H06012    Serial number: 400207A02000B0
   Coding: 0000101
   Shop #: WSC 31414 790 00001
   VCID: 201AE9F046C91A47528-8074

No fault code found.

-------------------------------------------------------------------------------
Address 61: Battery Regul.        Labels: 4F0-910-181.lbl
   Part No SW: 4L0 910 181 A    HW: 4L0 915 181 
   Component: J0644 BEM       H12 0690  
   Revision: --------    Serial number: 00000000028740
   Shop #: WSC 22133 444 58922
   VCID: 2514F8E459EBFF6F21E-8070

   Subsystem 1 - Part No: 4F0 915 105 D
   Component: von VA0  310314E04G       
   Coding: 344630393135313035442056413033313033313445303447
   Shop #: WSC 22501 444 57517

1 Fault Found:
03041 - Energy Management Active 
            000 -  -  - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 7
                    Fault Frequency: 44
                    Reset counter: 255
                    Mileage: 190168 km
                    Time Indication: 0
                    Date: 2017.11.10
                    Time: 13:54:25


-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 4L0-910-795.lbl
   Part No SW: 4L0 910 795 B    HW: 4L0 959 795 B
   Component: TSG HL          H21 0150  
   Coding: 0051722
   Shop #: WSC 31414 790 00001
   VCID: 313C1CB41D23A3CFCD6-8064

No fault code found.

-------------------------------------------------------------------------------
Address 65: Tire Pressure        Labels: 4F0-910-273-BA.lbl
   Part No SW: 4F0 910 273 B    HW: 4F0 907 273 A
   Component: Reifendruck 3   H05 0100  
   Revision: 00050100    Serial number: 00000700056523
   Coding: 0062424
   Shop #: WSC 31414 790 00001
   VCID: 221EE3F848C5085744C-8076

No fault code found.

-------------------------------------------------------------------------------
Address 69: Trailer (J345)       Labels:. 4E0-907-383.clb
   Part No SW: 4E0 907 383 E    HW: 4E0 907 383 E
   Component: Anhaenger     H14 0080  
   Revision: 2A002001    Serial number: 00000105968925
   Coding: 0200000000000000
   Shop #: WSC 31414 790 00001
   VCID: 2C020DC03601CE27FE0-8078

No fault code found.

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 4L0-910-441.clb
   Part No SW: 4L0 910 441 A    HW: 4L0 907 441 A
   Component: J772__Rearview      0050  
   Revision: --H12---    Serial number: 525PA8-J7X406V
   Coding: 1021201
   Shop #: WSC 31414 790 00001
   VCID: 2412E5E052D10667360-8070

No fault code found.

-------------------------------------------------------------------------------
Address 6D: Trunk Elect.        Labels: None
   Part No SW: 4L0 910 945     HW: 4L0 827 851 C
   Component: ValeoHeckdeckel H25 0290  
   Revision: --H25001    Serial number: E5030000B     
   Shop #: WSC 98765 666 38354
   VCID: 6C82CDC0FA810E27BE0-8038

   Subsystem 1 - Part No: 4L0 910 946 
   Component: ValeoHeckdeckel H25 0290

   Subsystem 2 - Serial number: E5030100B     

   Subsystem 3 - Serial number: RD09.10.07--H25001001C0336ÿ

   Subsystem 4 - Serial number: 1C0336ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 6F: Centr. Conv. II        Labels:. 4L0-910-290.lbl
   Part No SW: 4L0 910 290 A    HW: 4L0 907 290 A
   Component: ILM HINTEN 2    H05 0060  
   Revision: AAH05061    Serial number: 003137826-----
   Coding: 0003595
   Shop #: WSC 31414 790 00001
   VCID: 2616FFE824EDF477284-8072

   Subsystem 1 - Part No: 4L0 910 591 
   Component: J_245_EE16_SKB09H10 0200

   Subsystem 2 - Part No: 4L0 910 591 
   Component: J_394_EE16_SKB09H10 0200

   Subsystem 3 - Part No: 4L0 910 591 
   Component: J_392_EE16_SKB09H10 0200

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 4L0-910-795.lbl
   Part No SW: 4L0 910 795 B    HW: 4L0 959 794 B
   Component: TSG HR          H21 0150  
   Coding: 0051722
   Shop #: WSC 31414 790 00001
   VCID: 313C1CB41D23A3CFCD6-8064

No fault code found.

-------------------------------------------------------------------------------
Address 76: Park Assist        Labels: 4Fx-910-283.lbl
   Part No SW: 4F0 910 283 H    HW: 4F0 919 283 H
   Component: Parkhilfe 8-Kan H12 0080  
   Revision: 00H12000    Serial number: 06340727404486
   Coding: 0231246
   Shop #: WSC 31414 790 00001
   VCID: 290CF4D435F3DB0F056-807C

No fault code found.

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

End----------(Elapsed Time: 02:11, VBatt start/end: 13.1V/13.0V)-----------

I saw some posts saying it could be the battery but this battery is less than a year old and has never given us any issue. Any help or suggestions is greatly appreciated.
 
   #2  

PetrolDave

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Code:
Saturday,12,May,2018,18:19:37:44948
VCDS Version: Release 18.2.0 (x64)
Control Module Part Number: 4L0 910 468 A
  Component and/or Version: J533__Gateway   H06 0060

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                OK                      OK                  
[COLOR=#ff0000]47-Sound System             OK                      ERROR [/COLOR]              
56-Radio                        OK                      OK                  
37-Navigation               OK                      OK                  
0F-Digital Radio(SAT)        OK                      OK
Any suggestions on where I should start?
You have a fault in the optical bus, so I would start there.
 
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   #3  

Sebastian

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Q7 (4L) and A6 Avant (4F) always are known for water issues and while this must not be the case here, start by checking the optical connection between 77 and 47. The simplest way to do that would be to use an optical loop and re-run the optical bus test again, once while the loop replaces the 47 and once while the loop replaces the 77 module. After that you'll know whether or not the issue is with the 77 output diode, the 47 input diode or the optical connection between the two. From there you can narrow things down further.
 
   #4  

Uwe

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I did a complete scan and noticed even though some components said OK above, they did not appear ok in the full scan
That's expected. Any 'break' in the optical ring bus takes all the components on the right bus (except the Gateway) off-line.

-Uwe-
 
   #5  

Jef

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Lets get another cook on this pot of soup!

MOST Optic bus issues, gotta have yourself and optic loop tool. Part number 4E0 973 802.
CbCoCC0.jpg


An optic error means that module is not receiving optic data. So in your case, the Sound System is not receiving optic data from the Telephone module. 3 reasons this could be happening:

  1. Telephone module failed, not sending optic data.
  2. Optic cable between Telephone and Sound System failed.
  3. Sound System failed, unable to receive incoming optic data.

So you need to get hands the Telephone or Sound System module. I think it will be easier to get to the optic cables at the Sound System. Unplug the optic cables and fit the above optic loop tool in place of the Sound System and then redo the Optical Bus Diagnostics test in VCDS.

You will have one of two results, both of which will include the Sound System still having an optic error:

  1. No change in the testing, Sound System is the only optical error. This means Telephone is sending optic data, passing through the test loop and onto the next module. Failed Sound System
  2. Radio not has optic error as well. This means that no optic data was reaching the Sound System in the first place, so nothing to pass through the loop. Most likely a failed telephone module.

The poor man test... unplug the optic cables from the Sound System and then have some one turn the ignition on. Do you see one of the ends of the optic cable light up red briefly? If so, then that would imply the Telephone send some data.

This soup needs pepper... who has the fresh pepper?
 
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praxeum

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Thank you all for the suggestions. I will get one of those tools and see what I can figure out.
 
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I finally received the optic loop tool (I didn't realize when I purchased it on eBay the seller was in Latvia so it took a while to arrive).

I believe the "47 - Sound System" is the one right behind the access door in the right rear of the vehicle, when I inserted the tool in the loop at that point I now had two errors, one for 47 - Sound System and one for 56 - Radio, as you suggested might happen. I take this to mean the Telephone module is not sending out optical data. From searching online it looks like the telephone module is beneath the passenger seat, but I cannot find a specific part number. Is it the same as the Bluetooth module?

Also, do I need to be worried about component protection on the telephone module? The nearest Audi dealership is a 5 hour drive away so I am really hoping I don't need them to do anything.

Thanks in advance for all the help.
 
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Jef

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Vehicle Identification No. WA1BV74L88D028862
Model audi q7 qu. 4.2
AQ7
Date of production 20.10.2007
Year 2008
Sales type 4LB4EL
Engine Code BAR
Transmission Code JXS

It does appear to be the telephone module is our prime suspect and is located under the passenger seat. Don't worry about the part number of it for now, get under the passenger seat, locate the module with optic cables going to it and use that optic loop tester in place of said module. Then see if your Sound System becomes optic OK.

If the telephone module is in fact bad, you can unplug it electrically, leave that optic loop tester in place, and recode some other modules so they no longer expect a telephone module. A8 crowd knows what I'm talking about.

If you do replace the telephone module, I'm not 100% sure it has component protection... anyone want to chime in here.
 
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praxeum

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Sorry, force of habit there on the coding...here it is again formatted properly.

Code:
Monday,11,June,2018,13:07:44:44948
VCDS Version: Release 18.2.0 (x64)
Control Module Part Number: 4L0 910 468 A
  Component and/or Version: J533__Gateway   H06 0060

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        		OK                  	ERROR               
47-Sound System     		OK                  	ERROR               
56-Radio      	      		OK                  	OK                  
37-Navigation       		OK                  	OK                  
0F-Digital Radio(SAT)		OK                  	OK
 
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Uwe

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Hmm, I'm not sure what to make of the fact that the sound system still shows an error.

-Uwe-
 
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Jef

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Vehicle Identification No. WA1BV74L88D028862
Model audi q7 qu. 4.2
AQ7
Date of production 20.10.2007
Year 2008
Sales type 4LB4EL
Engine Code BAR
Transmission Code JXS

MMI with Soundsystem BOSE (8RY)

Correct me if I'm wrong here folks, but in some cases, isn't the radio (R) and "Sound System" (J525) them same module?

With the optic loop in place of the Telephone Module under the passenger seat, can you directly scan address 07 Control Head?
With the optic loop in place of the Sound System at the right rear fender well, can you directly scan address 07 Control Head?

If my somewhat educated guess is correct, you'll be able to scan the Control Head when the optic loop tool is in place of the Sound System.
 
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This is my first Audi but it seems to me the Sound System must be bad. With everything connected like it should be it is the only thing that shows an error. When I put the fiber Optic loop in place of the Telephone module then it shows an error as well (which is expected) but does not change the error in the Sound System. So I am guessing there is an issue with the Optical Input on the Sound System.

Given these things have Component Protection, and the nearest Audi dealership is a 5 hour drive away...I think I will remove it and send it in for repair - does any one have experience with these guys: http://boserepairexperts.eu/
 
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Jef

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With the optic loop in place of the Telephone Module under the passenger seat, can you directly scan address 07 Control Head?
With the optic loop in place of the Sound System at the right rear fender well, can you directly scan address 07 Control Head?

Please do those test and report back.
 
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praxeum

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I put the Optical Loop in place then tried to directly scan 07. I went to 'Select Control Module" and selected 07 - Control Head, I could not access it with or without the fiber optic loop in place. So I tried others; Radio, Navigation, Media Player and none could be accessed, even though they all showed OK on the Optical Scan. Maybe I am doing it wrong, how do you directly scan one component?
 
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Jef

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Start VCDS, click on [Select] to go to the "Select Control Module" screen, from there, click on whatever item you wish to directly scan.

The MOST Bus system is "all or nothing", it has to be a complete fiber optic circle for any of those modules on that system to talk to VCDS. If a control module itself is bad and "breaks" the optic loop, then you can't directly scan any of those modules.

Right now you have some failure with the MOST bus and we are assuming it is a control module (99.9% of the time it is). Using the optic loop to bypass the [failed] control module would restore the MOST bus so that the other control modules can talk to VCDS.
 
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praxeum

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@Jef-

Thanks for the explanation. That is what I was doing but it does not matter if I put the fiber optic bypass in place of the phone module (under the passenger seat) or in place of the Sound System (in the right rear fender well) I cannot talk to any of the devices. Should I start putting the bypass in place of other modules?
 
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Sound system module includes gateway between copper wired CAN and optical MOST buses. If it is bad or disconnected, You will not be able to connect to any of MOST modules directly.
 
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Jef

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If bypassing the modules isn't helping, then it is possible there is a failure of the optic cable between the telephone and sound system.

Unplug the fiber optic cables from the Telephone Module.
Have partner cycle ignition on/off several times... you should see one of the fiber optic cables light red briefly. If not, bigger issues. If so, continue....

Plug the optic loop tester up in place of the telephone module.
Unpug the fiber optic cables from the Sound System.
Have partner cycle ignition on/off several times... you should see one of the fiber optic cables light red briefly.

If you don't see the red light at the Sound System, it optic data just isn't making it to the Sound System, this now implies a failed optic cable.
 
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