Has anyone compiled list of OBD-II protocols (physical layers) used by various vehicles? they're required to be J2534 compatible but what about manufacturer specific pins? is it even common for manufacturers to put extra protocols on the connector?
like SW-CAN on GM vehicles. Opel also has K-Line protocols on multiple pins(?)
This information is proprietary. Pro Scan tool manufacturers spend many thousands of hours sampling/deciphering vehicle data and reverse-engineering from OEM tool communications. This is the very value of their product.
They would be unlikely to publish this data to the general public.
It's like asking Colonel Sanders what his recipe is.