J1708 code list. Under the same connector, it’s common to find a modern...

J1708 code list. Under the same connector, it’s common to find a modern J1939 CAN network operating together with a legacy J1708 serial channel. Society of Automotive Engineers standard SAE J1708 is a standard used for serial communications between ECUs on a heavy duty vehicle and also between a computer and the vehicle. In typical applications, a half-duplex RS485 transceiver chip is used to connect to the bus. Society of Automotive Engineers standard SAE J1708 is a standard used for serial communications between ECUs on a heavy duty vehicle and also between a computer and the vehicle. SAE J1708 standard outlines serial data communication protocols for microcomputer systems in heavy-duty vehicle applications. The J1708 serial communications link specification was issued by SAE in 1986. Dec 2, 2025 · In real workshop environments, heavy-duty vehicles rarely speak through one protocol at a time. Learn why the industry transitioned to J1939 for better speed, diagnostics, and scalability. Jul 27, 2025 · Explore the key differences between SAE J1708 and SAE J1939 communication protocols in heavy-duty diesel trucks. Jan 26, 2026 · Understand the J1708 connector's role in heavy-duty vehicle diagnostics, its pinout, compatibility issues, and how it compares to J1939 and OBD2 systems. aruiqx wja jwervxv qdfi ynsqhs wuj qxgrje ugkkw nlbqr rbfxatc