OBD2 commumications Alfa156
of course it takes something to not work in order to introduce myself.
Anyway, my story is: I have a 2001 Alfa 156 1.6 - Lovely machine and really enjoy driving it. So, the dreaded Engine Management Light has come on and I'd like to read back from the ECU to see what's the story. I have tried 5 or 6 software packages with no Joy.
The OBD connector has Pins 1,3,4,5,7,8,9,11 & 16 populated so, am I correct in assuming its a ISO9141 interface with No L-line? 4&5 are Gnds and 16 is Vbat. Can anyone tell me what the others do and if my assumptions are correct? I have decided to ask the experts as someone might be able to guide me in the right direction.
Also I am using Jeff Noxon's opto isolator interface from RS232 to the OBD2.
Anyway, hope someone can tell if I am following the right path or going in the wrong direction
Happy Christmas to one and all