Method and control unit for monitoring a signal of a sensor

A control unit for monitoring a signal of a sensor, an actuating-travel position of at least one movable shift-element half (10) of a form-locking shift element (A, F) of a transmission (3) detectable with the sensor during a disengagement or an engagement of the form-locking shift element (A, F) with respect to another shift-element half (11) across an entire actuating travel of the at least one movable shift-element half (10), the shift-element halves (10, 11) engageable with each other in a form-locking manner, the actuating travel of the at least one movable shift-element half (10) extending from a first end position, which corresponds to a disengaged operating condition of the form-locking shift element (A, F), to a second end position, which corresponds to an engaged operating condition of the form-locking shift element (A, F), the control unit configured to:

• detect a malfunction of the sensor when a current actuating-travel position of the at least one movable shift-element half (10) detected with the sensor is outside of the actuating-travel range and is spaced from the first end position or from the second end position by more than a threshold value;
• and
• during a subsequent actuation of the form-locking shift element (A, F), determine whether the at least one movable shift-element half (10) is located in a demanded end position.