Pinpointing When your ECU / DME has failed and what faults are existing is the first step in replacing or correcting your ruined . The most elementary tests to ascertain Should your ECU / DME has failed are: OBD fault codes - Most diagnostic scanners can go through fault codes https://bmwecuvalidationservice34566.thelateblog.com/30470015/detailed-notes-on-bmw-ecu-bench-unlock