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OBD Communications Compliance Test Cases for Heavy Duty Components and Vehicles
- Ground Vehicle Standard
- J1939/84_201601
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
The purpose of this Recommended Practice is to verify that vehicles and/or components are capable of communicating a required set of information, in accordance with the diagnostic messages specified in SAE J1939-73, to fulfill the off-board diagnostic tool interface requirements contained in the government regulations cited below.
This document describes the tests, methods, and results for verifying diagnostic communications from an off board diagnostic tool (i.e., scan tool) to a vehicle and/or component. SAE members have generated this document to serve as a guide for testing vehicles for compliance with ARB and other requirements for emissions-related on-board diagnostic (OBD) functions for heavy duty engines used in medium and heavy duty vehicles.
The development of HD OBD regulations by US EPA and California’s Air Resources Board (ARB) require that diagnostic message services are exercised to evaluate diagnostic communication standardization requirements on production vehicles. The user should reference the summary provided by SAE J1939-73 Table 1 and Table 2 for OBD compliance support.
The February 2015 version of SAE J1939-84 replaced the test procedures in section 6 in order to implement a 2-operating cycle failure detection process for Production Vehicle Evaluation (l)(1) as requested by ARB. The tests also exercise diagnostic executive features such as three drive cycle accounting, freeze frame management and the general denominator in addition to the demonstration of interface function. Detailed criteria for some tests are described in a normative appendix, Appendix A, which was inserted before the output report examples that are now in Appendix B.
The December 2008 publication of J1939-84 described a test process for EURO IV and EURO V engine emissions and diagnostics regulations, which is given in section 7. The December 2010 version of the document added a test plan and procedure outline for ARB and US EPA HD OBD requirements with emphasis on 13 CCR 1971.1 (l)(1) Verification of Standardized Requirements, as section 6. The June 2012 version added the observation of the MIL_On to MIL_Off transition for a single trip CCM fault and reformatted tables in section 6 to improve ease of use.
Rationale
This version of SAE J1939-84 improves the February 2015 version by improving language that relies upon contextual technical details in referenced documents. An Engine Serial Number evaluation was added to sections 6.1 and 6.2. Wait times for fault erasure using DM3 and DM11 were increased to 5 seconds. The transition between part 7 and part 8 was improved to better assure that DM28 tests don’t experience a false positive outcome. Section A.6 was improved to separate evaluation of readiness bits provided by OBD modules from non-supported DM5 data provided by non-OBD modules. Data in Table A.7 reflects the content of SAE J1939-DA of February 2015. Section A.10 was added to describe processing for PGNs that are only supported by some of the OBD modules under test.
Recommended Content
| Ground Vehicle Standard | Vehicle Application Layer |
| Ground Vehicle Standard | Application Layer - Diagnostics |
| Ground Vehicle Standard | OBD Communications Compliance Test Cases for Heavy Duty Components and Vehicles |
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Unnamed Dataset 3 | ||
| Unnamed Dataset 4 | ||
| Table 1 | Summary test plan for HD OBD PVE | |
| Table 2 | EURO IV/V conditions and services tested | |
| Unnamed Dataset 7 | ||
| Table 3 | Minimum data stream support | |
| Unnamed Dataset 9 | ||
| Table 4 | Criteria for freeze frame evaluation | |
| Table 5 | Composite vehicle monitor support | |
| Table 6 | Composite vehicle readiness | |
| Table 7 | Composite vehicle test results | |
| Table 8 | Valid slot identifiers for DM30 test results | |
| Table 9 | MIL Status and Flash MIL Status allowed values for section 6 tests | |
| Table 10 | Example test summary report for HD OBD | |
| Table 10 | Example test summary report for HD OBD | |
| Table 11 | Example summary detail report for test | |
| Table 11 | Example summary detail report for test | |
| Table 12 | Example HD OBD test log |
Issuing Committee
Truck Bus Control and Communications Network Committee
The Truck and Bus Control and Communications Network Committee of the Truck & Bus Electrical/Electronic Steering Committee is responsible for developing, reviewing and approving standards, recommended practices and information reports related to communication networks for the exchange of control and diagnostic information among electronic components on or connected to truck and bus vehicles. The objective is the architecture of communication networks offering an open interconnect system that supports communication between loose package components, such as engines and transmissions, which are sourced from many different component suppliers and integrated into vehicle systems. The communication networks are developed for use in on-highway and off-highway trucks and their trailers, buses, construction equipment, and agricultural equipment and implements, and applicable to 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).
Reference
| Number | Title |
|---|---|
| 13 CCR 1968.2 | This document is not part of the subscrption. |
| 13 CCR 1971.1 | This document is not part of the subscrption. |
| ISO 3779:2009 | This document is not part of the subscrption. |
| J1699/3_201205 | Vehicle OBD II Compliance Test Cases |
| J1939/03_202105 | On-Board Diagnostics Implementation Guide |
| J1939/11_201209 | Physical Layer, 250 Kbps, Twisted Shielded Pair |
| J1939/13_201110 | Off-Board Diagnostic Connector |
| J1939/15_201405 | Physical Layer, 250 Kbps, Un-Shielded Twisted Pair (UTP) |
| J1939/21_201012 | Data Link Layer |
| J1939/71_201103 | Vehicle Application Layer (Through May 2010) |
| J1939/73_201307 | Application Layer - Diagnostics |
| J1939/81_201106 | Network Management |
| J1939_201104 | Serial Control and Communications Heavy Duty Vehicle Network - Top Level Document |
| J2403_201102 | Medium/Heavy-Duty E/E Systems Diagnosis Nomenclature |
| J272 | This document is not part of the subscrption. |
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