Determining if your ECU / DME has failed and what faults are present is the first step in changing or correcting your weakened . The most basic exams to determine If the ECU / DME has unsuccessful are: OBD fault codes - Most diagnostic scanners can read through fault codes https://bmwecuupdate77653.blog-a-story.com/10102749/the-2-minute-rule-for-hyundai-ecu