Question:

I’ve bought a Topdon Artidiag900 lite second hand no vci dongle, question is the Topdon topscan dongle the same thing as the included vci dongle?

Answer:

The VCI for TopScan is not compatible with the AD900 Lite.

Tested.
The Topscan VCI or the Topdon ONE VCI are unable to pair with AD90 Lite scanner.