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Define a process enabling devices to detect the baud rate of a network automatically with the intent of minimizing or eliminating communication disruption between existing devices.

Define a process enabling devices to detect the baud rate of a SAE J1939-11, SAE J1939-14, or SAE J1939-15 network automatically with the intent of minimizing or eliminating communication disruption between existing devices. These networks only support CBFF and CEFF Data Frames, as defined in ISO 11898-1.

Define a process enabling devices to detect the baud rate of a SAE J1939-11, SAE J1939-14, or SAE J1939-15 network automatically with the intent of minimizing or eliminating communication disruption between existing devices. These networks only support CBFF and CEFF Data Frames, as defined in ISO 11898-1.

The SAE J1939 documents 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 documents is to provide an open interconnect system for electronic systems. It is the intention of these documents to allow Electronic Control Units to communicate with each other by providing a standard architecture. This particular document, SAE J1939-21, describes the data link layer using the Classical Extended Frame Format (CEFF) with 29-bit IDs, as defined in ISO 11898-1, December 2015. For SAE J1939, no alternative data link layers are permitted.

This document is intended to supplement the SAE J1939 documents by offering the SAE J1939 information in a form that can be sorted and search for easier use.

This document is intended to supplement the SAE J1939 documents by offering the SAE J1939 information in a form that can be sorted and search for easier use.

This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.

This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.

This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.

This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.

This Information Report is intended to supplement the J1939 documents by offering the application of SAE RP J1939 to OBD data communications in a form that can be sorted and searched for easier use. It is NOT intended as a substitute for the actual regulations and standards documents, and any discrepancies between this document and the published documents must be resolved in favor of the published documents. This spreadsheet outlines elements in ARB OBD II and HD OBD requirements and identifies which J1939 SPNs and messages may be used to satisfy the datastream, readiness, in-use ratio, and test results requirements.

This document provides the technical requirements for implementing the SAE J1939 Functional Safety Communication Protocol in a manner determined suitable for meeting industry applicable functional safety standards.

The SAE J1939 communications network is developed for use in heavy-duty environments and suitable for horizontally integrated vehicle industries. The SAE J1939 communications network is applicable for light-duty, medium-duty, and heavy-duty vehicles used on-road or off-road, and for appropriate stationary applications which use vehicle derived components (e.g., generator sets). Vehicles of interest include, but are not limited to, on-highway and off-highway trucks and their trailers, construction equipment, and agricultural equipment and implements. SAE J1939-71 is the SAE J1939 reference document for the conventions and notations used to specify the parameter (SP) placement in PG data, the conventions for ASCII parameters, and conventions for PG transmission rates. This document previously contained the majority of the SAE J1939 OSI application layer data parameters and messages for information exchange between the ECU applications connected to the SAE J1939 communications network.

As described in the parent document, SAE J1939, there is a minimum of seven documents required to fully define a complete version of this network. This particular SAE Recommended Practice, SAE J1939-71, describes an Application Layer for vehicle use.