CAN bus uses two wires in a balanced setup to provide better immunity from noise.Does CANBUS run on a single-wire? I will assume it does as all seems to be functioning as per the manual.
PCCM is multimedia adapter. The manufacturer is PCCM. The model is: MA-BOX. It is sold in the US by these guys: https://www.euro-parts.us/home.php?cat=262.What do you mean by PCCM? Is that a manufacturer, or a seller, or something else?