have server different windows Canbus monitoring software
All those collections of letters make sense. That collection of words does not.
but I don't know how to code the Arduino to pass the info it gets from the Canbus to the computer so I can use the programs. I can have the information scroll through the serial monitor but I need an easier way to be able to see the the changes in data.
So, you clearly DO know how to get the Arduino to pass data to the PC.
What I want to do is place the gateway between two nodes so I can identify what node sends what.
That will happen only if the two nodes identify themselves in some way.
My ultimate goal is to read the information my RNS2 head unit
Your what?
sends to and from the infotainment bus
The "infotainment" bus?
then use the Arduino to emulate the radio
And do what? I hope you realize that the Arduino is NOT a radio.
and interface with the carpc.
"interface with" is such an overused, and meaningless term. No idea what a "carpc" is. Is that some kind of fish?