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SAE J1939-77 (NOV2025)

SAE J1939 CAN FD Functional Safety Assurance Data
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SAE J1939-77 (NOV2025)

SAE J1939 CAN FD Functional Safety Assurance Data

PUBLISH DATE 2025
SAE J1939-77 (NOV2025)

This document describes the functional safety (FuSa) assurance data to be included when communicating safety-related A_PDUs using either the Multi-PG service or the FD Transport service within an SAE J1939-22 protocol stack.

It specifies the following:

  • The parameters that make up the FuSa assurance information
  • The behavioral requirements when producing and consuming FuSa assurance information
  • The technical requirements for different FuSa profiles intended to meet different application requirements
  • The trailer formats for the different FuSa profiles that can be incorporated into Multi-PG and FD Transport services

This document does not specify the assignment of a FuSa profile to any values of the TOS and TF fields when using the Multi-PG service, or to any value of the AD TYPE field when using the FD Transport service; instead, SAE J1939-22, or an OEM in the manufacturer-specific ranges of these fields, specifies the assignments for these fields.

SDO SAE: SAE International
Document Number J1939-77
Publication Date Nov. 19, 2025
Language en - English
Page Count 58
Revision Level 202511
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