I have 1999 E46 with ELM327 OBDII cable and Scanmaster software. It works fine with the software. No fault codes etc. so I'm happy. When I use the same software with the 20 pin connector adapter on my 1997 E36 it does not connect. Any ideas why?
Thanks for all your ideas and detailed response - but I take it that it is a no-no to try and get my E36 to connect.