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Digital Sound System Control Module - J525- CONNECTOR ASSIGNMENT, STANDARD AND ANC, FROM MY 2015

WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Digital Sound System Control Module - J525-
GWWA91-12249Courtesy of AUDI OF AMERICA, LLC
  1. MOST bus
  2. 18-Pin Connector - T18-
  3. 38-Pin Connector - T38-
NOTE:

Unlisted connector terminals are not assigned.

Fig 2: 2 - MOST Bus
GWWA91-11851Courtesy of AUDI OF AMERICA, LLC
  1. Input
  2. Output
Fig 3: 2 - 18-pin connector (T18)
GWWA91-12003Courtesy of AUDI OF AMERICA, LLC

6 - Noise Reduction Microphone 3 - R287- (+)

7 - Noise Reduction Microphone 3 - R287- (-)

8 - Noise Reduction Microphone 1 - R285- (+)

9 - Noise Reduction Microphone 1 - R285- (-)

10 - Speed signal from Engine Control Module - J623- (+)

11 - Speed signal from Engine Control Module - J623- (-)

13 - Noise Reduction Microphone 4 - R288- (+)

14 - Noise Reduction Microphone 4 - R288- (-)

16 - Noise Reduction Microphone 2 - R286- (+)

17 - Noise Reduction Microphone 2 - R286- (-)

Fig 4: 3 - 38-Pin Connector - T38-
GWWA91-12114Courtesy of AUDI OF AMERICA, LLC
  1. Terminal 30
  2. Terminal 31
  3. Not Assigned
  4. Subwoofer - R211- (-)
  5. Not Assigned
  6. Not Assigned
  7. Left rear speaker (-)
  8. Right rear speaker (-)
  9. Not Assigned
  10. Not Assigned
  11. Left Front Bass Speaker - R21- (-)
  12. Left Front Bass Speaker - R21- (+)
  13. Right Front Bass Speaker - R23- (-)
  14. Right Front Bass Speaker - R23- (+)
  15. Not Assigned
  16. Subwoofer - R211- (+)
  17. Not Assigned
  18. Not Assigned
  19. Left rear speaker (+)
  20. Right rear speaker (+)
  21. Not Assigned
  22. Not Assigned
  23. Not Assigned
  24. Not Assigned
  25. Ring-break Diagnostic Cable
  26. Right Front Midrange Speaker - R104- (+)
  27. Right Front Midrange Speaker - R104- (-)
  28. Not Assigned
  29. Not Assigned
  30. Not Assigned
  31. Center Speaker - R208- (+)
  32. Center Speaker - R208- (-)
  33. Right Front Treble Speaker - R22- (+)
  34. Right Front Treble Speaker - R22- (-)
  35. Left Front Treble Speaker - R20- (+)
  36. Left Front Treble Speaker - R20- (-)
  37. Left Front Midrange Speaker - R103- (+)
  38. Left Front Midrange Speaker - R103- (-)