Pin 19 and 20 and ground are the only pins / connections required for ECU operation, even the relay to the injectors are not required.
If the ECU does not power on, this mean either the internal DC-DC converter / some electronis has ceased to be or maybe broken solder joints.
If the ECU does not power on, this mean either the internal DC-DC converter / some electronis has ceased to be or maybe broken solder joints.
