Data Bus On Board Diagnostic Interface Connector

Connection of optical MOST bus (fiber optic) - item 1 - 

Fig 1: Connection Of Optical Most Bus (Fiber Optic)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1. Input
2. Output

26-pin harness connector - item 2 - 

Fig 2: 26-Pin Harness Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1. Battery + (Terminal 30)
2. Battery + (Terminal 30)
3. Wake-up instrument cluster
4. Ring-break diagnostic wire
5. not used
6. CAN-BUS high (convenience)
7. not used
8. Powertrain CAN-Bus, High
9. CAN-BUS high (instrument cluster)
10. not used
11. CAN-BUS high (diagnosis)
12. not used
13. E-CAN high
14. Ground - terminal 31
15. Ground - terminal 31
16. Terminal 15
17. not used
18. not used
19. CAN-BUS low (convenience)
20. not used
21. Powertrain CAN-Bus, Low
22. CAN-BUS low (instrument cluster)
23. not used
24. CAN-BUS low (diagnosis)
25. not used
26. E-CAN low