Try the following:
1. Connect to control unit HU7 (HU7_Entry / HU7_High depending on variant).
2. Navigate to Routines (Jobs).
3. Find a procedure similar to: Theft_protection_release, Anti_theft_unlock, HU_Theft_Protection_Adaptation, Teach_in_of_component_protection or similar.
4. When performing the procedure, the program should prompt you to enter a PIN. Enter the PIN, then run the job.