i was wondering if there is a way to tell if i have a us or jdm ecu and wether or not it is obd2a or obd2b. what i have is a p73 and it is a smaller ecu. the numbes on it are:37820-p73-ao4 i dont know if that tells you anything or not. but i need to find out so if anyone knows how to tell then let me know. thanks alot

 

anyone?

 

I believe thats obd2B..... what do the big letters say?

here's a pic of an obd2A conversion harness........see how the obd2A side has a gap in the middle where nothing plugs into it?! If your ecu is infact an obd2B, the open gap will probably be on the Left side if i'm not mistaken...or could be the right...depends on how you look at it.....