SAE J1939-22 is the CAN FD evolution of the J1939 family. In SAE’s own high-level description, it brings CAN’s flexible data rate capability into J1939 to support higher efficiency, parallel transactions, functional safety, and cybersecurity-oriented extensions, while preserving the J1939 application model built around PGNs, SPNs, source addresses, requests, diagnostics,…
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SAE J1939: A Higher-Layer Protocol for Heavy-Duty Vehicles
By Wilfried Voss on February 15, 2025
This article is part of our comprehensive SAE J1939 online documentation. SAE J1939 is a higher-layer protocol built on the Controller Area Network (CAN), enabling serial data communication between microprocessor-based Electronic Control Units (ECUs) in heavy-duty vehicles. CAN’s Strength in Reliability and Performance CAN is designed for maximum reliability and…
