An airbag electrical control unit mounted in a vehicle includes a position detecting circuit that detects a current position of the vehicle; a computing circuit that computes impact that the vehicle undergoes using a signal from a sensor; and a notifying circuit that notifies a previously designated recipient of a notification data that includes the detected current information alone or both the detected current position and the computed impact. Here, a traveling mode that addresses a traveling-period trouble generated while the vehicle is traveling and a parking mode that addresses a parking-period trouble generated while the vehicle is being parked are switched into each other.