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OBD2 is the connector and the protocols used on that connector. The vehicle CAN bus is on the OBD2 port, and the "K-line", which is diagnostic only, is also th
by fenwick67 9y ago
OBD2 is the connector and the protocols used on that connector. The vehicle CAN bus is on the OBD2 port, and the "K-line", which is diagnostic only, is also there.
- ex3ndr 9y agoNot the full CAN bus, only very small subset of it, isn't it?
- fenwick67 9y agoThe connector has at least 1 CAN bus on it, some pins are "manufacturer discretion" meaning the manufacturer may put CAN or other signals on the connector. Nowadays most vehicles have several CAN and LIN buses and it's unlikely that all traffic gets routed to the OBD2 connector, but some stuff is. Again, it depends on the manufacturer. There are lots of standardized signals defined that a OBD device can request: https://en.wikipedia.org/wiki/OBD-II_PIDs https://en.wikipedia.org/wiki/OBD-II_PIDs