Research and development of vehicle fault diagnostic protocol ISO15765

In this paper, CAN based vehicle fault diagnostic protocol ISO15765 is introduced, and the architecture of ISO15765 is analyzed. The paper provides the overall design of the ISO15765 protocol stack, the software realizations of each layer of ISO15765 are also introduced. Lower layers provide interfaces to higher layers. The development of internal operation of each layer adopts modular design. The result of the experiment shows that the protocol stack provided by the paper satisfies ISO15765 standard and general fault diagnosis requirements.