The full, unedited standard must be purchased directly from the SAE International website. It undergoes periodic updates to include new SPNs, FMIs, and diagnostic capabilities required by evolving emission standards (like EPA and EURO requirements).
Since the standard is copyrighted and sold by SAE International, obtaining the PDF from a legitimate vendor is crucial for accuracy and to ensure you have the latest version. The most direct way is to purchase it from official standards resellers. Various versions of the SAE J1939-73 standard, including PDF and hardcopy formats, are available for purchase from authorized distributors. Some distributors offer online subscriptions where users can search, view, and download PDF documents, with automatic updates when standards are issued or revised.
| Revision Date | Status | Key Changes | |---|---|---| | February 1996 | Initial Issued | First publication of the diagnostic application layer | | October 1998 | Historical | — | | June 2001 | Historical | — | | March 2004 | Historical | — | | September 2006 | Historical | 158 pages | | February 2010 | Historical | Added DM12 clarification, updated Appendix A for OBD DTC FMIs, added Appendix J for OBD readiness bits | | January 2016 | Historical | — | | May 2017 | Historical | Clarified message requirements for DM13, DM1, DM2, DM12, DM19 | | January 2019 | Historical | — | | August 2022 | Historical | — | | December 2024 | Latest (Current) | 219 pages; added CSERS PGs and SPs for 13 CCR 1971.1 support; added OBD compliance values in DM5 for Off-Road Tier 5 engines and BS CEV Stage 5 |
The J1939 standard is mapped across the OSI (Open Systems Interconnection) model. J1939-73 resides at . It uses the physical layer (J1939-11/15) and data link layer (J1939-21) to package and transport diagnostic data. Core Features and Functions of J1939-73 Sae J1939-73 Pdf
Captures snapshots of critical engine and vehicle data (like RPM, coolant temperature, and load) at the exact moment a fault occurs.
Today, the "SAE J1939-73 PDF" is a heavily protected and frequently updated technical standard (most recently updated in ). It contains thousands of lines of logic that define:
Many engineering firms, universities, and automotive manufacturers maintain enterprise subscriptions to the SAE Digital Library, granting employees or students direct PDF access. Implementation Alternatives The full, unedited standard must be purchased directly
This important companion document "describes the tests, test methods, and results for verifying diagnostics communication from an off board diagnostic tool to a vehicle and/or component." It references J1939-73 to validate that vehicles or components are capable of communicating a required set of diagnostic information, ensuring compliance with government regulations like ARB requirements for emissions-related OBD functions for heavy-duty engines.
Covers specialized test parameters, oxygen sensor tests, and continuously monitored system states.
This means that while J1939-73 provides a comprehensive diagnostic framework, a simplified subset of the standard is sufficient to meet government-mandated On-Board Diagnostics (OBD) requirements in various jurisdictions. The most direct way is to purchase it
let dtc = DiagnosticTroubleCode::new(520, 4); // SPN 520, FMI 4 let dm1 = Dm1Message mil_lamp: LampStatus::On, rsl_lamp: LampStatus::Off, awl_lamp: LampStatus::Off, pl_lamp: LampStatus::Off, dtcs: vec![dtc], ; assert!(dm1.has_active_faults());
SAE J1939-73 is a part of the SAE J1939 protocol, which is a standardized protocol for vehicle networks. The protocol was developed by the Society of Automotive Engineers (SAE) to ensure interoperability and compatibility between different ECUs from various manufacturers. SAE J1939-73 specifically focuses on the application layer and transport layer of the protocol, defining the rules for data communication, message prioritization, and network management.