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)