SAE規格 SAE J1979-3, 2023: E/E Diagnostic Test Modes: Zero Emission Vehicle Propulsion Systems on UDS (ZEVonUDS)

SAE規格 J1979-3, 2023

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SAE規格 J1979-3, 2023

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SAE J1979-3, 2023: E/E Diagnostic Test Modes: Zero Emission Vehicle Propulsion Systems on
UDS (ZEVonUDS)

SAE規格 J1979-3, 2023: E/E診断テスト・モード Zero Emission Vehicle Propulsion Systems on UDS
発行元 SAE International
発行年/月 2023年10月   
装丁 ペーパー
ページ数 54 ページ
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Description

 

Introduction
SAE J1979-3 describes the communication between the zero emissions propulsion systems and test equipment required by government regulations. Standardization regulations require passenger cars and light-, medium-, and heavy-duty trucks to support a minimum set of diagnostic information to external (off-board) “generic” test equipment.

To achieve this, SAE J1979-3 is based on the Open Systems Interconnection (OSI) Basic Refer to 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:

• Application (layer 7), specified in:
○ ISO 14229-1, ISO 14229-3 UDSonCAN, or ISO 14229-5 UDSonIP
○ SAE J1979-3 ZEVonUDS

• 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 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

• 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
○ ISO 13400-4 Road vehicles - Diagnostic communication over Internet Protocol (DoIP) - Part 4: Ethernet-based highspeed data link connector
○ SAE J1962 Diagnostic Connector

NOTE: SAE J1979-3 provides a standard to satisfy known country-specific certification regulations. SAE J1979-3 is not considered a final authority for interpretation of the certification regulations, so users of this document should determine the applicability of capabilities defined in this document for their specific OBD regulatory requirements

SAE Document Reference Concept
SAE J1979-3 references several SAE documents which contain all terms, data, and DTC definitions.
See Figure 1, with the following definitions:
• SAE J1930 defines a procedure for naming objects and systems and with the set of words from which names are built. It references SAE J1930DA, which contains all standardized naming objects, terms, and abbreviations.
• SAE J1979DA contains all standardized data items for OBD diagnostics communications, including PIDs, Test IDs, Monitor IDs, and InfoType IDs. Many data items are augmented with user notes for calculation and display. Usage notes for clearing fault codes and combining diagnostic events are also provided for diagnostic executive design.
• SAE J2012 defines the procedure for defining emissions-related diagnostic trouble codes. It references SAE J2012DA, which contains all standardized data items like DTCs and FTBs.
• SAE J1939DA contains all standardized SPNs, which can be used as DTCs for HDV/MDV applications.
• SAE J1939-73 Appendix A defines Failure Mode Indicators (FMIs).

SAE J1979DA (Digital Annex)
This document references SAE J1979DA. SAE J1979DA is concerned with the definition of:
• Data Identifiers (DIDs)
○ Parameter Identifiers (PIDs) ○ Info Types (ITIDs)

• Routine Identifiers (RIDs)

SAE Digital Annex Revision Procedure
New ZEV regulatory requirements require monitoring of the componentry that facilitates zero emission transportation. New ZEV technology parameters and diagnostic trouble codes need to be standardized to support the external (off-board) “generic” test equipment. All relevant information is proposed by the automotive industry who are represented by members of the appropriate SAE task force.

The index of SPN assignments is published quarterly in SAE J1939DA. SAE J1939DA includes all the SPN labels defined in SAE J2403 and SAE J2403DA. SAE J1939DA also defines a range of manufacturer proprietary SPNs that are occasionally used for diagnostic conditions that do not map unambiguously into the standardized list of SPNs.

Document Scope
This document is intended to satisfy the data reporting requirements of standardization regulations in the United States and Europe, and any other market that may adopt similar requirements in the future. This document specifies:

a. Message formats for request and response messages.
b. Timing requirements between request messages from external test equipment and response messages from vehicles, and between those messages and subsequent request messages.
c. Behavior of both the vehicle and external test equipment if data is not available.
d. A set of diagnostic services, with corresponding content of request and response messages.
e. Standardized source and target addresses for clients and vehicle.

This document includes capabilities required to satisfy OBD requirements for multiple regions, model years, engine types, and vehicle types. At the time of publication many regional regulations are not yet final and are expected to change in the future. This document makes no attempt to interpret the regulations and does not include applicability of the included diagnostic services and data parameters for various vehicle applications. The user of this document is responsible to verify the applicability of each section of this document for a specific vehicle, engine, model year, and region.

SAE J1979-3 specifies diagnostic services, and both functionally addressed and physically addressed request/response messages required to be supported by motor vehicles and external test equipment for diagnostic purposes which pertain to motor vehicle emission-related data. Any external test equipment meeting the requirements of SAE J1978 is intended to be able to use these messages to retrieve ZEV propulsion-related information from the vehicle.

The structure of this document is based on the structure of SAE J1979 for the convenience of users familiar with SAE J1979. 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.

SAE J1979-3 references SAE J1979DA, which includes all Data Identifiers and Routine Identifiers.