METHOD AND DEVICE FOR CARRYING OUT AN ONBOARD DIAGNOSIS

A method for checking a function of an actuator or a sensor of a system, having the following steps: controlling the actuator within a time window if at least one state variable of the system is in a predefined operating range; detecting a system response, with the aid of the sensor, within the time window as a response to controlling the actuator; determining a malfunction of the actuator or of the sensor if the system response differs from a setpoint system response that is expected due to controlling the actuator. A further actuator of the system is controlled during the time window in such a way that the at least one state variable of the system remains in the predefined operating range during the time window. Moreover, a corresponding method for calibrating a sensor or an actuator of a system is described.