Only short the Pin 7&8 from my vcds cable, and use it for bmw?
2. uses DTR instead of RTS (pin4 on sub D RS232)
3. Pin 1 of OBD is connected to DSR (pin 6 of a sub RS232) over a 1k resistance (for shorts protection)
4. RS232 RI (pin 9 of sub D RS232) is connected with OBD pin 16 (+ battery feed to detect battery signal) over a 1k resistance (shorts protection, the diod is polarity protection).