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J1939 Serial Vehicle Network Explanation and Tutorial
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English
Abstract
In the heavy duty vehicle industry, data links allow electronic controllers on a vehicle to interact efficiently to achieve the vehicle's mission. The interactions include sharing sensor data and calculated information, allowing subsystems to influence each other's operation, and communicating subsystem operation state and subsystem configuration. Data links also provide a means for onboard and offboard diagnostic work, including electronic controller identification, reading and clearing diagnostic information, recalibration, and configuration of the controller for the specific vehicle application. The Truck and Bus Control and Communications Network Subcommittee began development of SAE Recommended Practice 51939 to satisfy these needs. This paper presents the serial data communications that have been adopted in the published and draft SAE Truck and Bus J1939 documents: J1939, 51939101, 51939111, 51939121, J1939131, J1939171, J1939173 and J1939181. It contains a comparison to the previous generation of data link standards used in the heavy duty vehicle industry: J1708, 51587 and 51922. Examples of control, information sharing, multiplexing, diagnostics and proprietary messaging are provided.
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Authors
Citation
Stepper, M., "J1939 Serial Vehicle Network Explanation and Tutorial," SAE Technical Paper 972757, 1997, https://doi.org/10.4271/972757.Also In
References
- Stepper, M.R. Data Link Overview for Heavy Duty Vehicle Applications SAE Paper No. 902215 Truck and Bus Meeting and Exposition Detroit, MI October 29 November 1 1990
- Stepper, M.R. J1939 High Speed Serial Communications, The Next Generation Network for Heavy Duty Vehicles SAE Paper No. 931809 Future Transportation Technology Conference San Antonio, TX August 9 - 12 1993
- Stepper, M.R. Butler S.R. Zhu G.G. On-Board Diagnostics, A Heavy Duty Perspective SAE Paper No. 951947 Future Transportation Technology Conference and Exposition Costa Mesa, CA August 7 - 10 1995
- Stepper, M.R. Worldwide Standards and Their Impact on Seamless Integration IEEE Paper No. 96C057 presented at Convergence 96, International Congress on Transportation Electronics Dearbom, MI October 21 - 23 1996