The SAE J1939-73 protocol offers several benefits to the automotive industry, including:
SAE J1939-73 is a protocol specification that defines the communication requirements for vehicle networks using the Controller Area Network (CAN) bus. The protocol is designed to facilitate communication between ECUs in a vehicle network, enabling the exchange of data, such as vehicle speed, engine speed, and gear position. SAE J1939-73 is a critical component of the SAE J1939 protocol suite, which provides a standardized framework for communication between ECUs in heavy-duty vehicles. Sae J1939-73 Pdf
While robust, J1939-73 has limitations: it does not define flashing or reprogramming of ECUs (covered in J1939-73’s companion, J1939-71 for parameter assignment). Also, the original CAN at 250 or 500 kbps is becoming bandwidth-constrained for advanced diagnostics with many ECUs. SAE has therefore extended the standard to to support CAN FD (flexible data-rate) for larger payloads. The SAE J1939-73 protocol offers several benefits to
Includes protocols (like DM11) to reset or clear diagnostic information once repairs are completed. Lamp Status Management: While robust, J1939-73 has limitations: it does not