I finally got the adapter to start reading the can bus signals so i can make my own cruise control system and the wires on the adapter had pre striped wire ends and I was not careful enough and shorted out the power wire on the OBD2 port which went dead and the car turned off and would not start!!!! It turns over but the spark ignition coil would not turn on. After I tested all fusses and found no dead ones I tried applying 12V to the dead wire where there used to be 12V on the OBD2 port and the car would start again.
so I am probably powering the ECM through the OBD2 port with a wire directly connected to my car battery!!
I need the can bus wiring diagram and the ecm wiring diagram
chevy aveo5 2008
orange wire to the OBD2 port pin 16 12V always on