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| Abbreviation | SAE J1939 |
|---|---|
| Status | Published |
| Latest version | 2013-08-14 |
| Organization | SAE International |
| Committee | Truck Bus Control And Communications Network Committee |
| Related standards | ISO 11898, ISO 11992, ISO 11783, NMEA 2000 |
Society of Automotive Engineers standard SAE J1939 is the vehicle bus recommended practice used for communication and diagnostics among vehicle components. Originating in the car and heavy-duty truck industry in the United States, it is now widely used in other parts of the world.
SAE J1939 is used in the commercial vehicle area for connection and communication throughout the vehicle, with the physical layer defined in ISO 11898. A different physical layer is used between the tractor and trailer, specified in ISO 11992.