Determining If the ECU / DME has failed and what faults are current is the initial step in replacing or repairing your weakened . The most basic exams to find out Should your ECU / DME has failed are: OBD fault codes - Most diagnostic scanners can examine fault codes https://bmw-ecu-pinout35678.blog2news.com/30522285/5-simple-statements-about-ecu-map-porsche-992-acc-explained