Patent ID: 7845248

Claim:
A shift-by-wire control system for an automatic transmission device manipulated by an operator, the shift-by-wire control system comprising: a range switching unit for switching a shift range of the automatic transmission device between a P-range and an other shift range than the P-range; a parking lock device adapted to bringing an output shaft of the automatic transmission device to a lock state in conjunction with the range switching unit when switching to the P-range, the parking lock device adapted to bringing the output shaft of the automatic transmission device to a lock-release state in conjunction with the range switching unit when switching to the other shift range; an electric motor for actuating the range switching unit and the parking lock device in accordance with an instruction of the operator; a manual device for transmitting manual operation force of the operator to the parking lock device to actuate the parking lock device when the electric motor stops; a motor output shaft for transmitting torque of the electric motor to the parking lock device; and an output shaft gear rotatable integrally with the motor output shaft, wherein the manual device includes a one-way transmission unit adapted to permitting transmission of the manual operation force in a direction in which the parking lock device is brought to the lock state, the one-way transmission unit is adapted to prohibiting transmission of the manual operation force in a direction in which the parking lock device is brought to the lock-release state, the one-way transmission unit includes at least a P-in gear adapted to be engaged with the output shaft gear and a rod adapted to transmit manual operation force, the rod is supported by a case accommodating the P-in gear and axially movable relative to the case, and the P-in gear is supported by the rod and movable relative to the rod.