ChuliaLT:
I was able to find the answer myself. After careful analyzing of the circuit (I'm not that good with them, after all :]) I figured out that nothing bad could happen if I try connecting it my way - and it works. I was able to connect to Consult via USB, read sensors, error codes, etc.Makes sense. Now it's the time to interface it with Mega.
Hi! Sorry for my bad English. Only this part http://joxi.ru/8AnoBgJiq8J0Vr needed to make communication between Arduino and Consult?