Patent ID: 11872996
Assignee: HELLA GMBH & CO. KGAA
Field: Transport (Mechanical engineering)
Classification: CPC B  H | IPC B

Claim 5:
6. A method for fault diagnosis in a control system for controlling a first actuator or a first and a second actuator of a motor vehicle, wherein the control system is the control system according to claim 5, the method comprising:
measuring the current flowing in the relevant phase via the corresponding measurement resistor such that a functionality of each individual switch is determined; and
galvanically isolating, in an event of a malfunction of one of the switches in the first power electronics unit, the first actuator from the first power electronics unit via the at least one first disconnect switch, or in the event of a malfunction of one of the switches in the second power electronics unit, galvanically isolating the second actuator from the second power electronics unit via the at least one second disconnect switch and the actuator corresponding to the faulty power electronics unit is galvanically connected to the backup power electronics unit via the at least one connecting switch corresponding to this actuator.