Method and device for turning off or reversing a drive arrangement for a motor vehicle part which can be moved

摘要

A method and a device for turning off or reversing a motor of a drive arrangement for the operation of a part, which can be moved, on a motor vehicle, in particular an opening closure which can move. During working operation, the current which is supplied to the motor is passed via a measurement resistor. The voltage which is dropped on the measurement resistor in this case is evaluated via a measurement path. The motor is turned off or its running direction is reversed if a preselected threshold value is reached. During a diagnosis mode, which is used to diagnose the measurement path, a known input signal is applied to the input of the measurement path. The actual output signal which occurs at the output of the measurement path in response to the known input signal is compared with a predetermined nominal output signal which will be expected at the measurement path output if the measurement path is operating correctly. The output signal which occurs at the measurement path output during working operation is corrected depending on this comparison, or the drive arrangement is switched over to reversionary mode operation. <IMAGE>