There are some things that we can check.
Please start a terminal app and get root:-
With pscan
not connected to the computer type:-
Then plug in pscan into the USB port (you don't need to connect to a car for this). Now again type
You will see (hopefully) some new line have appeared at the end of the dmesg logs that were not there before it was plugged in.
Please reply here and paste in the new extra lines that appear ones the pscan box is plugged into a USB port.