Patent ID: 7735387

Claim:
A selector drive for an automated manual transmission of a motor vehicle, the selector drive comprising: an electric motor having a defined step width, rotational movement of the electric motor is transferable, via a mechanical transmission path connected between the electric motor and a selector mechanism for selection of a selector position whereby rotation of the electric motor, and corresponding movement of the mechanical transmission path, moves the selector mechanism between selector positions, and the selector position being determinable by the defined step width of the electric motor; and at least one of known individual step angles of the electric motor and distances between the selector positions in the selector mechanism determine a number of steps of the electric motor required for selection of a specific selector position, wherein one of an increase in electric current and a decrease in electrical current in a target coil determines a position of the electric motor, a value of the electrical current is measured at a preset time after turning off a driving source of the electrical current, and the value of the electrical current is compared with a value corresponding to the specific selector position in the selector mechanism for determining whether a rotor of the electric motor is located in an expected specific position.