Data Bus On Board Diagnostic Interface, Multi-Pin Connector Assignment

32-pin Connector -A-

Fig 1: Identifying MOST Bus Input And Output

Courtesy of AUDI OF AMERICA, LLC

1. LIN bus 2
2. Extended CAN bus low
3. Diagnosis CAN bus low
4. Comfort CAN bus low
5. Powertrain CAN bus low
6. CAN bus Low, instrument cluster
7. FlexRay bus ground channel 1
8. FlexRay bus ground channel 2
9. FlexRay bus ground channel 3
10. FlexRay bus ground channel 4
11. FlexRay bus ground channel 5
12. FlexRay bus ground channel 6
13. Ground (GND) "-" (terminal 31)
14. Terminal 15
15. Not assigned
16. Battery "+" (terminal 30)
17. LIN bus 1
18. Extended CAN bus high
19. Diagnosis CAN bus high
20. Comfort CAN bus high
21. Powertrain CAN bus high
22. CAN bus High, instrument cluster
23. FlexRay bus positive channel 1
24. FlexRay bus positive channel 2
25. FlexRay bus positive channel 3
26. FlexRay bus positive channel 4
27. FlexRay bus positive channel 5
28. FlexRay bus positive channel 6
29. Ground - (terminal 31)
30. Instrument cluster prompt wire
31. Not assigned
32. MOST Bus ring break diagnosis

Optical MOST-Bus Connection (Fiber Optic) -B-

Fig 2: Identifying MOST Bus Input And Output

Courtesy of AUDI OF AMERICA, LLC

1. MOST Bus input
2. MOST Bus output