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Telematics Control Module, 42-Pin Connector Assignment

WARNING: This page is about a different car, the 2007 Volkswagen Touareg, 2006 Volkswagen Touareg, 2005 Volkswagen Touareg, and 2004 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Telematic Control Module -J499- Multi-Pin Connector Assignments
GWWN91-0508Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  1. Signal activation - Dual Horn Auxiliary Relay 
  2. Signal activation "lock vehicle" 
  3. Cellular telephone, input signal audio, not assigned 
  4. Cellular telephone, signal battery charge condition of cellular telephone, not assigned 
  5. Cellular telephone, negative 
  6. Cellular telephone, TXD transfer, not assigned 
  7. Cellular telephone, RTS, ready to transmit, not assigned 
  8. Cellular telephone, shielding telephone line, not assigned 
  9. CAN bus High 
  10. Audio signal to radio, positive 
  11. Emergency speaker, positive, not assigned 
  12. Microphone signal, positive 
  13. K-wire, diagnosis connection 
  14. Voltage supply terminal 15, positive 
  15. Status red LED 
  16. Status green LED 
  17. not used 
  18. Negative, terminal 31 
  19. Negative, terminal 31 
  20. not used 
  21. not used 
  22. Signal activation - Auxiliary Emergency Flasher Relay 
  23. Signal activation "unlock vehicle" 
  24. Cellular telephone, output signal audio, not assigned 
  25. Cellular telephone, negative, not assigned 
  26. Cellular telephone, voltage supply, positive, not assigned 
  27. Cellular telephone, RXD transfer, not assigned 
  28. Cellular telephone, RTS, ready to transmit, not assigned 
  29. Signal status telephone base plate, cellular telephone inserted or removed, not assigned 
  30. CAN bus Low 
  31. Audio signal to radio, negative 
  32. Emergency speaker, negative, not assigned 
  33. Microphone signal, negative 
  34. Signal for radio muting 
  35. Input signal "SOS" from Telematics control head 
  36. Input signal "SOS" from Telematics control head 
  37. not used 
  38. Input airbag signal "Crash" 
  39. Terminal 30 voltage supply 
  40. Terminal 30 voltage supply 
  41. Emergency battery, positive, not assigned 
  42. Emergency battery, negative, not assigned 
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