Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Hallo, my question is about ECU replace. I am have problem with charging system. Ford Focus 3 generation 1.6, alternator controlled by ECU through LIN bus. Problem is no control signal from ECM. Alternator and wire is good, connectors the same. Is necessary to programming new ECU after replace? AND HOW TO DO THIS? What about Immo? And if I will install not new used ECM will it need to programming?
When replacing ecm/ecu/pcm you will need to have it programmed to your car. This will be the same for new or used ecm/ecu/pcm. Along with antitheft relearn, cam-crank variation relearn etc.
