Succesfully read data from edc16c9 (opel vectra c 1.9cdti) with Launch X431 IMMO Plus xprog3 and mcu3 adapter. At least to get a connection you have to connect all cables like in manual and power up xprog3 cable and mcu3 adapter together, I mean one supply cable for xprog and second for mcu3 adapter. I also used usb connection between tablet and diagnostic device. Hopefully it will help someone.
