If you need to power up the ECU on a bench for testing or programming, connect:
If you want, I can:
This essay explores the technical specifics of the Bosch ME20 pinout, verifying its layout and explaining the functions of critical pins to provide a helpful guide for automotive professionals. bosch me20 pinout verified
Connect to the K-Line pin of your OBD2/Bench interface tool. If you need to power up the ECU