If the user is working on bench in an ECU without the cluster connected, the ECU cannot be flashed using an FRF file. If the ECU is authorized, writing the FRF flash file is possible and this is exactly what the function does. Once started, the procedure July last 30mins-2hrs and once finished, the ECU will be authorized (as if IGN is turned ON with a working key), which will allow the FRF flashing to be done. The screenshots below show what the procedure looks like:

1 Select the menu

2 Connect the DSBox and the ECU

3 Select the brand

4 Connection attempt running

5 Process running

6 The ECU is now authorized