Abstract: A functional module for an operational assistance system of a work apparatus or for a driving assistance system of a transportation vehicle for controlling a function of a piece of equipment of the work apparatus or of the transportation vehicle having a main function unit to produce and provide a function parameter set having at least one function parameter for control of the function of the piece of equipment and having a test and auxiliary function unit. The test and auxiliary function unit tests the function parameter set of the main function unit and takes a result of the test as a basis for outputting the function parameter set of the main function unit in a normal mode of operation to control the function of the piece of equipment.

Abstract: A steering control system for operating a steering system for a transportation vehicle according to a steering intervention specification by making available a steering intervention variable, the system having computing units to redundantly calculate a manipulated variable according to a specified calculation algorithm as a function of the steering intervention specification and one or more operating state variables; a switching device for always making available one of the manipulated variables of the computing units as the steering intervention variable to the steering system; and a monitoring device to check the functional capability of the computing units, wherein the switching device is actuated as a function of the result of the check.