I may have perhaps partaken of rum and cream soda while reverse engineering this VERY perplexing circuit. A circuit that looks like it's added analogue circuitry to stolen software and then added a layer of deception in the form of plated through holes that basically lead nowhere in particular.
It just makes me want to rewrite the software completely!
https://www.youtube.com/watch?v=azuB9ZJuDlM
I've made a short of the first OBD unit I looked at. I'll be releasing it now, as I fear the scammers may be feeding on the "fuel crisis".