1

13

2

3

4

5

6

7

8

9

10

11

12

20

19

18

17

16

15

14

BMW-20 diagnostic socket

1. Black - DME (TD)
4. Violet / black - +12V (R)
7. White / green - Service reset
12. Blue - Generator
14. Red - +12V (30)
15. White / Yellow - L-line (RxD)
16. Green / white - +12V (15)

19. Brown - GND

20. White / violet - K-line (TxD)

+12V

GND

16

7

8

4

5

OBD-II

BMW-20

+12V

K-line

K-line

GND

14

17

20

19

OBD-II to BMW-20 adapter

www.bmw-scanner.com

17. White / violet - K-line (TxD2)