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:
Mar 1, 2009
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 SAE J1939-0X document can be connected
via the network and communicate with each other without functional
interference. The SAE J1939-0X documents 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 SAE 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 J1939-15 for self
certification to these documents. In the future, additional
procedures may be defined and implemented to test new products to
ensure full compliance with all appropriate SAE J1939 documents.
Until that time, compliance will be determined by the manufacturer
of the component. 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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