This document specifies a transport and network layer protocol with transport and network layer services tailored to meet the requirements of CAN-based vehicle network systems on controller area networks as specified in ISO 11898-1.


The diagnostic communication over controller area network (DoCAN) protocol supports the standardized abstract service primitive interface as specified in ISO 14229-2 (UDS).


This document supports different application layer protocols such as:


—     enhanced vehicle diagnostics (emissions-related system diagnostics beyond legislated functionality, non-emissions-related system diagnostics);


—     emissions-related on-board diagnostics (OBD) as specified in the ISO 15031 series and SAE J1979 series;


—     world-wide harmonized on-board diagnostics (WWH-OBD) as specified in the ISO 27145 series; and