Method for influencing a control program

A method for influencing a control program of a control unit, the control program having a plurality of first functions configured for controlling an actuator. The program code of the control program is examined for the occurrence of function calls, and the branch addresses and return addresses connected with the function calls, and the variables connected with the applicable first functions, are ascertained with the names of the variables and with the applicable memory addresses. The ascertained first functions and variables assigned to the applicable first functions are stored with the connected memory addresses in a first mapping table, and from a comparison of the first mapping table with a second predefined mapping table, function names are assigned to at least a portion of the first functions, and at least one first value of one of the variables is replaced by a second value.