ISO 15765-2:2016

ISO 15765-2:2016 specifies a transport protocol and network layer services tailored to meet the requirements of CAN‑based vehicle network systems on controller area networks as specified in ISO 11898‑۱٫ It has been defined in accordance with the diagnostic services established in ISO 14229‑۱ and ISO 15031‑۵ but is not limited to use with them and is also compatible with most other communication needs for in‑vehicle networks.

ISO 11898‑۱ specifies variable length CAN frames with a maximum payload size dependent on the protocol device used. A CLASSICAL CAN protocol device can transmit/receive frames with payload sizes ranging from 0 bytes to 8 bytes per frame. A CAN FD (flexible data rate) protocol device can transmit/receive frames with payload sizes from 0 bytes to 64 bytes. A CAN FD protocol device is also capable of transmitting/receiving CLASSICAL CAN frames.

The diagnostic communication over controller area network (DoCAN) protocol supports the standardized service primitive interface as specified in ISO 14229‑۲ (UDS).