Fault memory

Faults that occur during operation are stored in a non-volatile memory (e.g. EEPROM). The faults remain in memory even if no voltage is present at terminals 15 and 30. The fault memory is designed in such a way that the occurring faults, data source, fault type and fault deletion counter can be saved. The transverse lock control unit sends messages and checks the CAN drive cyclically for messages from other control units. If no messages are received for a certain time period, a fault is stored in the fault memory.