Connect MSD81 unit, extra power adapter with VVDI2
Select ECU/CAS ISN->Read ECU Information
Read ECU ISN
The procedure takes about 6 to 10 minutes.
Strongly recommand you connect extra power to car/MSD unit
Switch ON ignition before continuing
Read ISN code success
Save ECU ISN code
Done.
http://blog.vvdishop.com/xhorse-vvdi2-read-bmw-e92-isn-msd81-on-bench/