Shift-by-wire device and transmission device mounting thereon the same

A shift-by-wire device connected communicatively to an administrative electronic control unit, which inputs thereinto a signal from a shift position sensor for detection of a demanded shift position demanded by a driver, to drivingly control a manual shaft on the basis of a shift command from the administrative electronic control unit to actuate an object being actuated, the shift-by-wire device comprising

• a shaft position sensor that detects a rotating angle of the manual shaft,
• a drive unit that drives an actuator of the manual shaft,
• an operational function unit including an operational CPU that inputs thereinto a rotating angle of the shaft from the shaft position sensor, receives a shift command from the administrative electronic control unit to transmit the rotating angle of the shaft thus input to the administrative electronic control unit, and controls the drive unit on the basis of the rotating angle of the shaft thus input and the shift command thus received, and
• a monitoring function unit including a monitoring CPU that inputs thereinto a rotating angle of the shaft from the shaft position sensor to monitor the presence of abnormality in the operational function unit and transmits the rotating angle of the shaft thus input to the administrative electronic control unit when it is determined that abnormality occurs in the operational function unit.