Telematics Control Module, 42-Pin Connector Assignment

Fig 1: Identifying Telematic Control Module -J499- Multi-Pin Connector Assignments

Courtesy 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