Xhorse VVDI BIMTOOL PRO can support to read ECU ISN directly. The supported ECU list are as following:
How to read ECU ISN with VVDI BIMTOOL PRO?
*If you cannot read it, click "Update ECU adaptor".
*If the adapter can be upgraded that means it's normal.
Check whether the connection and option are correct and try to read repeatedly.