包括了iso14230和saej1979，iso14230规定了OBD2系统的物理层以及数据链路层，saej1979是应用层的协议-Includes iso14230 and saej1979, iso14230 provides OBD2 system, as well as the physical layer data link layer, saej1979 is the application layer protocol

This document is based on the International Standard ISO 14230 Keyword Protocol 2000 and has been further developed to meet Swedish automotive manufacturer s requirements by the Swedish Vehicle Diagnostics Task Force. It is based on mutual