Servicing control units of motor vehicles via mobile radio

1. A method for private wireless exchange of device data between a control unit installed in a motor vehicle and a vehicle-external computing device, comprising:

registering a mobile radio module of the motor vehicle with a private mobile radio cell that only provides device data to and from the vehicle-external computing device, said private mobile radio cell being different from all mobile radio cells of public radio networks, and not permitting registering conventional mobile phones with IMSI (International Mobile Subscriber Identity), said mobile radio module being registered using a SIM (Subscriber Identification Module) card, the SIM card is an embedded Universal Integrated Circuit Card (eUICC) that is permanently installed in the motor vehicle and data transfer between the private mobile radio cell and the controller is set up by storing an access profile in the eUICC at least once or activating an access profile already stored in the eUICC,

setting up data transfer between the control unit and the mobile radio module of the motor vehicle, and

transmitting device data provided to the mobile radio module by the control unit of the motor vehicle, to the private mobile radio cell with which the mobile radio module was registered by the SIM card, wherein after the device data is transmitted, the access profile changes the data transfer set up of the mobile radio module for registering the mobile radio module in one of the public mobile radio networks.

2. The method of claim 1 , wherein the private mobile radio cell forms a microcell or a picocell or a femtocell.

3. The method of claim 1 , wherein the device data are exchanged during manufacture of the motor vehicle on factory premises or during repair work or maintenance work of the motor vehicle in an area of a repair shop.

4. The method of claim 3 , further comprising localizing the motor vehicle with a locating device on the factory premises or the area of the repair shop by way of the private mobile radio cell.

5. The method of claim 1 , wherein at least one additional private mobile radio cell is connected with the vehicle-external computing device, with the at least one additional private mobile radio cell comprising a dedicated private mobile radio cell that operates with the GSM, UMTS or LTE communication standard, and wherein the private mobile radio cells are interconnected so as to form a private wireless network, that passes on the wireless mobile radio connection between the private mobile radio cells.

6. The method of claim 1 , wherein the device data transmitted via the wireless mobile radio connection to the control unit and stored in the control unit include configuration data.

7. The method of claim 1 , wherein the device data transmitted via the wireless mobile radio connection from the control unit to the central computing device and processed by the central computing device include error messages or status messages or values of measured data, or a combination thereof.

8. The method of claim 1 , further comprising at least one of encoding, parameterizing and flashing the control unit based on the device data.

9. The method of claim 1 , further comprising:

initiating a self-test in the motor vehicle, and

automatically reconfiguring the data transfer set up of the mobile radio module for data transfer between the control unit of the motor vehicle and the mobile radio module during a self test by a control unit of the motor vehicle.

10. The method of claim 1 wherein the mobile radio module is at least one of a GSM (Global System for Mobile Communications) module, a UMTS (Universal Mobile Telecommunications System) module and an LTE (Long-Term Evolution) module.

11. The method of claim 1 wherein the number of wireless connections of mobile radio modules with the private mobile radio cell is limited so that at least a given minimum band width is ensured for exchanging the device data with the mobile radio module.

12. The method of claim 1 wherein the mobile radio module only transmits device data to and from the vehicle-external computing device.

13. The method of claim 1 , wherein the mobile radio module is connected to provide public cellular data communication, and the step of setting up data transfer reconfigures the connections of the mobile radio module to connect it to only communicate device data between the private mobile radio cell and the controller.

14. The method of claim 1 , wherein the mobile radio module is connected to provide public cellular data communication, and the step of setting up data transfer reconfigures the connections of the mobile radio module to connect it to only communicate device data between the private mobile radio cell and a CAN (Controller Area Network) bus connected to the controller.