SAE規格 J1939, 2023:(R)Serial Control and Communications Heavy-Duty Vehicle Network - Top-Level Document
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Description
This top-level document provides a general overview of the SAE J1939 network and describes the subordinate document structure. This document includes definitions of terms and abbreviations which are used among the various SAE J1939 subordinate documents.
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. It is possible that ECUs will be unable to communicate with one another if they conform to different SAE J1939-0X documents. It is possible that ECUs which conform to different SAE J1939-0X documents can 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 component 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, SAE J1939-14, and SAE J1939-15 for self-certification to these documents. SAE J1939-82 provides methods for self-certifying compliance to several of the other SAE J1939 documents. In the future, additional procedures can be defined and implemented to test new products to ensure full compliance with all appropriate SAE J1939 documents. Until that time, compliance is 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 Truck and Bus Control and Communications Committee for resolution.