Some months ago, magazine elector posted a new design which was a portable OBD2 diagnostic system. The IC used was the AT90CANxx (I don't remember).
I would like to make something similar, but my problem is that I cannot find any good information about some protocols.
This design was compadible with the protocols:
I have almost found the standards for protocols SAE J1850 PWM and VPW.
Does anybody knows where can I find information for free? I am looking for these standards.
Thanks for your time.