High-voltage systems connect the battery to the electric motor, the power electronics, the climate control, the charging technology and other electrical components. Damaged high-voltage cables, faulty plug connections or insulation problems can trigger warning messages and compromise safe operation of the vehicle.
Diagnosis Comes First
Every high-voltage repair begins with careful fault diagnosis. We systematically evaluate stored faults, relevant measured values and the components affected. Depending on the findings, we inspect:
- cables and connections
- housings and interlocks
- contact points and contact resistance
- further areas of the high-voltage system
The Decisive Question: Where Does the Fault Really Lie?
The key question is whether the fault displayed actually originates from the component named or is triggered by a fault in a connected system. A structured inspection avoids unnecessary parts replacement and concentrates on the actual cause.
Transparent Measures and Final Checks
If damaged or suspect high-voltage components are identified, we discuss the possible measures with you. Repair, replacement and further testing are planned on the basis of the technical findings. Every step remains clear and comprehensible for you.
After the work, the affected connections and functions are checked again. The aim is to restore the safety of the high-voltage system and to ensure that the battery, power electronics and electric drive work together reliably.
Warning message in the high-voltage system? Talk to us – safety comes first here.

