Greetings, I have a 1995 Subaru legacy in both automatic transmission and manual. Both cars have the obdII connector and say they are OBDII compliant (iso9141-2) on the emissions sticker, but they do not respond to obdII scans.
I am using the multiplex engineering
I modified the source code to not scan for test modes 5-9 (perhaps my engine doens't support it), but that didn't help.
Does anyone know what subaru did differently in the early years of OBDII to cause this non-compliance? ..Specifically in the initiation. I'm a c++ programmer, so I can modify the software if someone cues me in.