Search for 'J1979-2' - SAE International (2024)

Standard

2021-04-22

CURRENT

J1979-2_202104

SAE J1979-2 describes the communication between the vehicle's OBD systems and test equipment required by OBD regulations. ...To achieve this, SAE J1979-2 is based on the Open Systems Interconnection (OSI) Basic Reference Model in accordance with ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. ...When mapped on this model, the services specified are broken into: Diagnostic services (layer 7), specified in: ○ ISO 14229-1 ○ SAE J1979-2 OBDonUDS Presentation layer (layer 6), specified in: ○ SAE J1930, SAE J1930DA ○ SAE J1979DA ○ SAE J2012, SAE J2012DA ○ SAE J1939DA, SAE J1939-73 Session layer services (layer 5), specified in: ○ ISO 14229-2 Transport layer services (layer 4), specified in: ○ DoCAN: ISO 15765-2 Transport protocol and network layer services ○ ISO 15765-4 ○ DoIP: ISO 13400-2 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 2:Transport protocol and network layer services Network layer services (layer 3), specified in: ○ DoCAN: ISO 15765-2 Transport protocol and network layer services ○ ISO 15765-4 Requirements for emissions related systems ○ DoIP: ISO 13400-2 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 2:Transport protocol and network layer services Data link layer (layer 2), specified in: ○ DoCAN: ISO 15765-4, ISO 11898-1, -2 ○ DoIP: ISO 13400-3 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 3: Wired vehicle interface based on IEEE 802.3 Physical layer (layer 1), specified in: ○ DoCAN: ISO 15765-4, ISO 11898-1, -2, in accordance with Table 1 ○ DoIP: ISO 13400-3 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 3: Wired vehicle interface based on IEEE 802.3

Event

2023-12-14

Event

2023-11-09

Standard

2019-08-23

WIP

J1978-2

A set of diagnostic services to be provided by the external test equipment in order to exercise the services defined in SAE J1979-2, c. Conformance criteria for the external test equipment.

Standard

2019-08-23

WIP

J1699-5

The main purpose is to verify that vehicles are capable of communicating a minimum subset of information, in accordance with the diagnostic test services specified in SAE J1979-2: E/E Diagnostic Test Modes: OBDonUDS and J1979-3: E/E Diagnostic Test Modes: Zero Emission Vehicle Propulsion Systems on UDS (ZEVonUDS)

Event

2024-03-13

An overview of different OBD protocols and the difference between them. Many may know SAE J1979 (Classic) but there are some parts which pops up frequently. Some may know SAE J1939-73 but not the difference to SAE J1979 Classic or the OBDonUDS documents. Finally - the latest information from ASAM of how OBDonSOVD could work and examples of how to get SOVD data from either a passenger car (Utilizing OBDonUDS) or a truck utilizing SAE J1939.

Event

2023-09-13

Event

2024-03-13

The Communication Roundtable is an open discussion with the audience on any Diagnostic Communication related Topics, including: The upcoming OBDonUDS regulatory updates, follow-up on any topics from the SAE standards presentation, Generic Scan Tool topics, and any other diagnostic tool communication related questions. Multiple experts from the standards committees will be present weigh in on these topics.

Standard

2023-12-13

CURRENT

J1978-1_202312

A set of diagnostic services to be provided by an OBD-II scan tool in order to exercise the services defined in SAE J1979 and SAE J1979-2. The presentation of the SAE J1978 document family, where SAE J1978-1 covers first generation protocol functionality defined in SAE J1979, and SAE J1978-2 covers second generation protocol functionality defined in SAE J1979-2. ...The presentation of the SAE J1978 document family, where SAE J1978-1 covers first generation protocol functionality defined in SAE J1979, and SAE J1978-2 covers second generation protocol functionality defined in SAE J1979-2. The SAE J1978 document family does not preclude the inclusion of additional capabilities or functions in an OBD-II scan tool.

Standard

2023-10-06

CURRENT

J1979-3_202310

Each section of this part of SAE J1979-3 which specifies additional detail to existing sections of ISO 15765-4 and SAE J1979 supersedes those specifications for their use under the scope of SAE J1979-2. When applicable, a reference to respective sections in SAE J1979-2 is made in this document.

Technical Paper

2024-04-09

2024-01-1985

SAE J1979 and its “OBD Modes” served for the protection of our environment against harmful pollutants for decades, but due to regulatory adoption of Unified Diagnostic Services (UDS), SAE J1979 has now become a multiple part document series: SAE J1979 will be replaced by SAE J1979-2 for vehicles with combustion engines (ICEs) and by SAE J1979-3 for Zero Emission Vehicle (ZEV) propulsion systems. ...Both SAE J1979-2 and -3 are variants of ISO 14229 (UDS) but limited to emission-related and ZEV propulsion-related failures, respectively, and associated diagnostic data.

Standard

2024-01-30

WIP

J1979-2

SAE J1979-2 describes the communication between the vehicle's OBD systems and test equipment required by OBD regulations.

Technical Paper

2023-08-28

2023-01-5050

But OBD (OnBoard Diagnostic) under the emissions regulation is not yet updated for this shift of protocols and therefore vehicle manufacturers must support older OBD protocols (e.g., SAE J1979-2) during the transition phase. Another problem is that some of the software packages may fall under the DEC-ECU (diagnostic or emission critical electronic control unit) definition and need to communicate with an OBD scan tool.

Journal Article

2021-04-06

2021-01-0439

This study makes some key technical proposals/solutions for the possible use of OBD-like monitoring and reporting requirements for Electric Propulsion Systems, including, what are the monitoring requirements, what is to be monitored, what are the malfunction indicator light (MIL) illumination requirements, and what are the generic scan tool (GST) interface requirements that are based on J1979-2 (i.e., Unified Diagnostic Services -UDS) to facilitate the repair service by technicians, including from independent service shops.

Event

2024-03-13

SAE J1979 and its “OBD Modes” served the protection of our environment against harmful pollutants for decades, but due to regulatory adoption of the Unified Diagnostic Services (UDS), SAE J1979 now becomes a multiple part document series: SAE J1979 will be replaced by SAE J1979-2 for vehicles with combustion engines (ICE) and by SAE J1979-3 for Zero Emission Vehicle (ZEV) Propulsion systems.

Event

2023-09-14

The established SAE J1979 Classic OBD communication protocol is getting replaced by the UDS based SAE J1979-2 and J1979-3 protocols. But not all markets or regions will adapt the new protocols and not in the same timeframe.

Magazine

2023-08-10

Enhancing truck-sensor modularity Kodiak Robotics' fifth-generation sensor stack and new SensorPods boost sensor and GPU performance and improve power efficiency. Bosch high on hydrogen The supplier is committed to all facets of the H2 economy as volume production of its power module kicks off for Nikola's Class 8 fuel-cell truck. Constructing bus structures with stainless steel Outokumpu and collaborators show a possible weight reduction of up to 35% by using high-strength stainless steel in place of carbon steel. Volta Zero is U.S. bound The startup plans to apply lessons learned in Europe to the U.S. market, bringing a "small fleet" of electric trucks for potential customers by the end of the year.

Event

2024-08-19

The On-Board Diagnostics Symposium-Europe (OBD-EU) is the industry’s relied-upon resource for regulatory updates and standards reviews for light- and heavy-duty emissions controls.

Event

2024-08-19

September 17-19, 2019 │ Garden Grove, CA, USA