Questions & Answers for: The ecu

...is bad. If I replace it, how do I program the new one. There is lots of information here. Some ECU require you to enter the VIN Number using a code reader and a smartphone app. how to program ...

Where are the AC relay, fuel pump relay, ECU relay locations. Is it driver side underwood? Question edited for a bit of clarity. For every vehicle ever made in the history of vehicles with relays?? ...