Kess V2 V4.036 “Connection not established” (solved)

​ engineer here provides the final working solution to Kess v2 firmware V4.036 master ecu tuning kit “Connection not established” error.



When I run Kess V2 v4.036 Ksuite V2.22 software on Win XP Dell laptop, it can not communicate, computer did not detect the USB, Kess gave me error ”Connection not established” see error screen shots below:


kess-v2-connection-not-established-2 engineer solution:

Please replace the Resistance USB UL46 protection chip on Kess V2 4.036 PCB circuit board.



Customer feedback:

Ok update
I took this usb protection chip off my old ktag board.
Kessv2 now detected on usb
Thank you.

Note: If you have do not have old ktag/kess v2 to replace the UL46 chip, you can contact our customer service to send you the UL46 protection chip.