Belt Buckle Switch
The belt buckle switch is used to detect whether the seatbelt has been fastened or not. The detection signal is sent to the MRS5 control unit. The signal is used as a criterion for selective triggering of the actuators in the event of a crash. The belt buckle switches are located in the seatbelt buckles of both front seats.
The belt buckle switch is a two-wire Hall switch. The Hall switch is supplied by the MRS5 control unit via a current-signal interface. The current draw of the switch is the signal for the switch position. The belt buckle switch is permanently diagnosed and monitored in all electrical system statuses from Terminal R "ON" onwards.