Pin des Interlock-Steckers korrodiert

Corrosion on a pin in the high voltage interlock loop — the thin low voltage circuit threaded through every high voltage connector and cover so the vehicle can tell whether the system is still sealed. Its whole design intent is to be broken easily, because it must detect a cover that has been removed, and that same sensitivity is what makes a corroded pin enough to trigger it.

The response is deliberately severe and worth expecting. A loop the module cannot verify is treated as an exposed high voltage system, so contactors open and the vehicle refuses to run — no limp mode, no warning phase. A car that has stopped dead with an interlock code is behaving correctly, and it is a much better outcome than the alternative.

It is genuinely a safety circuit, so treat it as one. Do not bridge, bypass or back-probe a loop to prove a fault; the point of the circuit is that it fails safe, and defeating it defeats the protection. Follow the manufacturer's shutdown and isolation procedure before opening any connector in this loop. The commonest honest finding is moisture in a connector under the vehicle or in the boot, and cleaning and resealing the joint is the repair — but only after the system has been properly isolated.