While a CAN provides a tool for communication, J1939 is a higher-layer protocol that provides a language for communicating using that tool. J1939 is a set of standards that defines how information is transferred within a CAN to communicate information between ECUs. This committee developed SAE J1939 and its companion documents as a family of standards that provide a basis of design for ECUs, related devices, and network topology. The Truck and Bus Control and Communications Subcommittee is responsible for setting standards pertaining to commercial vehicles. The SAE is the Society of Automotive Engineers, which consists of multiple subcommittees that help determine standards of design for various types of vehicles. Understanding the J1939 protocol basics is a key part of understanding truck fault codes. SAE J1939 provides a protocol framework that allows all the vehicle’s CAN components to work together to control the vehicle’s operation and provide info about the vehicle’s health. This information can also be used to identify and diagnose mechanical and electronic problems, making maintenance significantly easier. The messages shared between ECUs through CAN communicate data such as vehicle road speed, torque, oil temperature, and fault codes that indicate current and historic component issues. In modern systems, Electronic Control Units or ECUs collect, transmit, command, and control information pertaining to commercial trucks’ systems and components, which are then communicated through a Controller Area Network or CAN. Since the late 1980s, commercial vehicles have used electronic systems in their daily operations.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |