BEM-TEC investigated a BMW plug-in hybrid with an unusual electrical and hybrid system fault. The case has been anonymised and the image is illustrative.
A complex fault called for thorough investigation
We followed a systematic diagnostic process using CAN measurements, voltage measurements, an oscilloscope and wiring diagrams. The findings narrowed the fault down to its actual cause.
Only the faulty part was replaced
Once the fault had been located, only the damaged component was replaced. Multiple working parts were not changed by trial and error or as a precaution. The system worked normally after the repair.
Diagnosis first, repair second
Careful investigation helps target a demanding repair correctly. At BEM-TEC, repair decisions are based on findings and measurements so that unnecessary part replacements can be avoided.