SAE J1939 (R) Recommended Practice for a Serial Control and Communications Vehicle Network
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SAE J1939 Document Information:
Title
(R) Recommended Practice for a Serial Control and Communications Vehicle Network
SAE International
Publication Date:
Oct 1, 2007
Scope:
These Recommended Practices are intended for light, medium, and
heavy duty vehicles used on or off road as well as appropriate
stationary applications which use vehicle derived components (e.g.
generator sets). Vehicles of interest include, but are not limited
to: on and off highway trucks and their trailers; construction
equipment; and agricultural equipment and implements.
The purpose of these Recommended Practices is to provide an open
interconnect system for electronic systems. It is the intention of
these Recommended Practices to allow Electronic Control Units to
communicate with each other by providing a standard
architecture.
Degree of Openness
An SAE J1939 network is open to the degree that any two ECUs
which conform to the same J1939/0X document can be connected via
the network and communicate with each other without functional
interference. The SAE J1939/0X dcouments describe a specific type
of application, typically representing a specific industry to which
it pertains such as agricultural or heavy duty trucks. ECUs which
conform to a different SAE J1939/0X document may not be capable of
communicating directly with one another and in some cases may cause
degradation or complete disruption of the entire network.
Proof of Compliance
There is no procedure presently in place to test, validate, or
provide formal approval for ECUs utilizing the J1939 network. Each
developer is expected to design their products to the spirit of, as
well as the specific content of, this recommended practice.
Provisions are made in SAE J1939/11 and SAE J1939/12 for self
certification to these documents. In the future, it is hoped that
procedures will be defined and implemented to test new products to
ensure full compliance with all appropriate SAE J1939 documents.
Until that time, compliance will be honorarily determined. Should
questions arise regarding the use or interpretation of any part of
these recommended practices they should be directed to the SAE
Control and Communications Subcommittee for resolution.
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