ECU tips and tricks
To enable the ECU to operate so that the diagnostic communication is working, a part of the pin assignment is required. This can be found in the wiring diagrams of the vehicle manufacturer or a question to the WWW can bring the solution.
In my searches on the WWW, I sometimes come across such interesting and crazy information about ECUs that I would not want to keep you from these.
Nevertheless, all implementations of the recommendations take place at their own risk and are "without guarantee". Should a control unit break because of the information given here or misuse, i can not help you unfortunately.