Abstract: A method for authenticating a vehicle with a service unit by way of a central computer unit external to the vehicle is provided. An initial value is transmitted from the service unit to the authentication unit and, depending on the initial value, the authentication unit reads a request command from a request table and outputs it to an interface of the vehicle. The authentication unit receives an output value from the interface, generated in response, and calculates a vehicle check value from the output value. The vehicle check value and the initial value are transmitted to the central computer unit. Depending on the initial value, the central computer unit reads a characteristic value from a characteristic value table and calculates a further vehicle check value. When the vehicle check value and the further vehicle check value match the central computer unit sends a predetermined enable signal to the service unit.

Abstract: A method for authenticating a vehicle with a service unit by way of a central computer unit external to the vehicle is provided. An initial value is transmitted from the service unit to the authentication unit and, depending on the initial value, the authentication unit reads a request command from a request table and outputs it to an interface of the vehicle. The authentication unit receives an output value from the interface, generated in response, and calculates a vehicle check value from the output value. The vehicle check value and the initial value are transmitted to the central computer unit. Depending on the initial value, the central computer unit reads a characteristic value from a characteristic value table and calculates a further vehicle check value. When the vehicle check value and the further vehicle check value match the central computer unit sends a predetermined enable signal to the service unit.