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详细说明：J1979_201202.TXT.pdf, 有需要的请下载，J1979_201202.TXT.pdfSAE J1979 Revised feb2012 Page 3 of 128 1. SCOPE 1.1 Introduction SAE J1979/So 15031-5 set includes the communication between the vehicle's OBd systems and test equipmen implemented across vehicles within the scope of the legislated emissions-related OBD To achieve this, it is based on the Open Systems Interconnection(oSI)Basic Reference Model in accordance with ISO/EC 7498-1 and ISo/EC 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 15031-5/SAE J1979(emissions-related OBD) ISo 27145-3(WWH-OBD) Presentation layer(layer 6), specified in lsO15031-2,SAEJ1930-DA, sO15031-5,SAEJ1979DA, sO15031-6,SAEJ2012DA sO271452,SAEJ2012DA, Session layer services(layer 5), specified ISo 14229-2 supports ISo 15765-4 doCAN and Iso 14230-4 Dok-Line protocols, Iso 14229-2 is not applicable to the sae j1850 and iso 9141-2 protocols Transport layer services(layer 4), specified in DoCAN: Iso 15765-2 Transport protocol and network layer services, SAE J1850: Iso 15031-5/SAE J1979 Emissions-related diagnostic services Iso 9141-2: ISO 15031-5/SAE J1979 Emissions-related diagnostic services DoK-Line: ISo 14230-4, ISo 15031-5/SAE J1979 Emissions-related diagnostic services Network layer services(layer 3), specified in DoCAN: Iso 15765-2 Transport protocol and network layer services SAE J1850: ISo 15031-5/SAE J1979 Emissions-related diagnostic services, ISo 9141-2: ISo 15031-5/SAE J1979 Emissions-related diagnostic services DoK-Line: Iso 14230-4, IS015031-5/SAE J1979 Emissions-related diagnostic services Data link layer (layer 2), specified in DOCAN:|SO15765-4,lSO11898-1,-2, SAE J1850 sO9141-2, DoK-Line: ISo 14230-2 Physical layer(layer 1), specified in DOCAN:|sO15765-4,lsO11898-1,-2, SAE J1850 SO9141-2, DoK-Line: IS014230-1 in accordance with table 1 SAE J1979 Revised feb2012 Page 4 of 128 TABLE 1-LEGISLATED EMISSIONS-RELATED OBDAWWH-OBD DIAGNOSTIC SPECIFICATIONS APPLICABLE TO THE OSI LAYERS Applicability OSI 7 layers Emissions-related obd communication Emissions-related WwH-OBD requirements communication requirements Application(layer 7) lso150315/SAEJ1979 So27145-3 s15031-2.-5.6 So271452 Presentation SAE J1930-DA/ SAE J1979-DA SAE J1930-DA/ SAE J1979-DA (layer 6) Seven layer SAE J2012-DA SAE J2012-DA according to ISO/EC Session(layer 5) Not Applicable SO14229-2 7498-1 d T ransport (layer SO ISo ISO/IEC So15031-5 142304157652 15765-2 134002 10731 Network(layer 3) Data link(layer 2) 14230-2 sO15765-4 SAE ISO ISO 15765-4 11898-1 J18509141-2 11898-1, 13400-3 Physical(layer 1) 14230-1 SaE document reference concept so 15031 references several sae documents which contain all terms data and dtc definitions See Figure 1- SAE Digital Annex document reference with the following definition of content in Iso 15031 parts SAE J1930: the document is concerned with a procedure for naming objects and systems and with the set of words from which names are built It references SAE J1930-DA which contains all standardized naming objects, terms and abbreviations SAE J1979: the document is concerned with the definition of emissions-related diagnostic services(diagnostic test modes). It references SAE J1979-DA which contains all standardized data items like PIDs, Test Ids, Monitor IDs and InfoType IDs SAE J2012: the document is concerned with the procedure for defining emissions-related diagnostic trouble codes. It references sae j2012-da which contains all standardized data items like dtcs and ftbs SAE J1979 Revised feb2012 Page 5 of 128 So150312 Terms definitions so150315 1so15031-6 abbreviations and Emissions-related Diagnostic trouble acronyms diagnostic services code(dTC)detinitions SAE J2012-DA SAE J1930-DA SAE J1979-DA OBD emissions-related emissions-related emissions-related acronym definition data definition diagnostic trouble code definition SAE J1930 SAE J1979 SAE J2012 Terms. definitions abbreviations and Emissions-related Diagnostic trouble diagnostic services code dtc)definitions acronyms SAE Digital Annexes FIGURE 1- SAE DIGITAL ANNEX DOCUMENT REFERENCE minimum set of diagnostic information to external (off-board)"generic"test equipmen, d heavy duty trucks, to support a On-Board Diagnostic (OBD) regulations require passenger cars, and light, medium ar SAE J1979-DA (Digital Annex This part of iso 1503 1 references the SAE J1979-DA. The SaE J1979-Da is concerned with the definition of Parameter Identifiers(PIDs), Test Identifiers(TIDs), OBD Monitor Identifiers(OBDMIDs) Unit and Scaling Identifiers(UASIDs), and Info Types(INFOTYPEs); SAE Digital Annex revision procedure New emissions-related regulatory requirements drive new in-vehicle technology to lower emissions. New technology related OBD monitor data 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 represented by members of the appropriate sae task force ISo 15031-5/SAE J1979 references a"Change Request Form"to be used for new data items to be defined by the Sae task force for standardization the standardized data items will be defined in the sae j1979-DA. once the information has been balloted and approved, the documents will be published on the SAE Store Web Site SAE J1979 Revised feb2012 Page 6 of 128 The revision request form and instructions for updating Iso 15031 Part 5/ SAE J1979 can be obtained on the Registration Authority' s web site at http://www.sae.org/servlets/works/committeehome.do?comtid=tevds14 The column titled"Resources"shows a document with the title: J1979-DA Revision Request Form. doc. Double click on the name and you will be asked to download the document with the filename SAE J1979-DA Revision Request Form. doc Fill out the revision request form with your request Please send e-mail with completed revision request form as attachment to SAE Automotive Headquarters 755 West Big Beaver Road Suite 1600 Troy,M|480844093,USA Fax:+1(248)273-2494 Email: saei1979sae. org 1.2 Document Scope This document supersedes SAE J1979 May 2007, and is technically equivalent to iso 15031-5 2010, with the addition of new capabilities required by revised regulations from the California Air Resources Board and revised regulations from the European Commission This document is intended to satisfy the data reporting requirements of on-Board Diagnostic (OBD )regulations in the United States and Europe, and any other region 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, to satisfy OBD requlations This document includes capabilities required to satisfy OBD requirements for multiple regions, model years, engine types and vehicle types. Those regulations are not yet final for some regions, 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/So 15031-5 specifies diagnostic services and functionally 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 emissions-related information from the vehicle Each section of this part of sae J1979/so 15031-5 which specifies additional detail to existing sections of iso 914 1-2 ISo 14230-4, SAE J1850, and ISo 15765-4 supersede those specifications SAE J1979 Revised feb2012 Page 7 of 128 This part of SAE J1979/So 15031-5 references the SAE J1979-DA(Digital Annex), which includes all definitions of PIDs OBDMIDS, TIDs and INFOTyPeS NOTE: SAE J1979/so 15031-5 provides the mechanism to satisfy the requirements included in the country-specific regulations and not all capabilities included in this document are required by the country-specific regulations. SAE J1979 is not considered a final authority for interpretation of the regulations, so readers should determine the applicability of capabilities defined in this document for their specific needs 2. NORMATVE REFERENCES The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments)applies ISo 7498-1, Information processing systems-Open systems interconnection-Basic reference model ISO/EC 10731, Information technology -Open Systems Interconnection- Basic Reference Model -Conventions for the definition of osi services ISo 9141-2: 1994, Road vehicles-Diagnostic systems-Part 2: CARB requirements for interchange of digital information ISo 9141-2:1994/Amd 1: 1996, Road vehicles- Diagnostic systems-Part 2: CARB requirements for interchange of digital information amendment 1 ISo 14230-4: 2000, Road vehicles- Keyword protocol 2000 for diagnostic systems -4: Requirements for emissions related systems ISo 15765-2, Road vehicles- Diagnostics on Controller Area Network (CAN)-Part 2: Network layer services ISO 15765-4, Road vehicles- Diagnostics on Controller Area Network(CAN)-Part 4: Requirements for emissions-related systems ISo 15031-1, Road vehicles- Communication between vehicle and external test equipment for emissions- related diagnostics-Part 1: General information and use case definition ISo 15031-2, Road vehicles Communication between vehicle and external test equipment for emissions- related diagnostics-Part 2: Guidance on terms, definitions, abbreviations and acronyms SO 15031-3, Road vehicles- Communication between vehicle and external test equipment for emissions-related diagnostics-Part 3: Diagnostic connector and related electrical circuits, specification and use ISo 15031-4, Road vehicles- Communication between vehicle and external test equipment for emissions-related diagnostics-Part 4: External test equipment ISO 15031-5, Road vehicles Communication between vehicle and external test equipment for emissions-related diagnostics-Part 5: Emissions-related diagnostic services So 15031-6, Road vehicles Communication between vehicle and external test equipment for emissions-related diagnostics-Part 6: Diagnostic Trouble Code Definitions iso 15031-7, Road vehicles Communication between vehicle and external test equipment for emissions-related diagnostics-Part 7: Data link securit SAE J1930-DA, Digital Annex of Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, and Acronyms SAE J1979 Revised feb2012 Page 8 of 128 SAE J1979-DA, Digital Annex of E/E Diagnostic Test Modes SAE J2012-DA, Digital Annex of diagnostic Trouble Codes and Failure Type Byte Definitions 2.1 Applicable Documents THE FOLLOWING PUBLICATIONS FORM A PART OF THIS SPECIFICATION TO THE EXTENT SPECIFIED HEREIN UNLESS OTHERWISE INDICATED, THE LATEST ISSUE OF SAE PUBLICATIONS SHALL APPLY 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323(inside Usa and Canada)or 724-776-4970(outside uSa),wwW.saE.org SAE J1850 Class b data Communications Network Interface SAE J1930 Electrical/Electronic Systems Diagnostic Terms, Definitions, Abbreviations, and Acronyms SAE J1978 OBD II Scan Tool SAE J2012 Diagnostic T rouble Code Definitions 2.1.2 SO Documents Available from American National standards Institute, 25 West 43rd Street, New york, ny 10036-8002, Tel: 212-642- 4900,www.ansl.org lso9141-2:1994 Road vehicles- Diagnostic systems-Part 2: CARB requirements for interchange of digital information ISo 9141-2: 1994/Amd 1: 1996 Road vehicles- Diagnostic systems- Part 2: CARB requirements for interchange of digital information amendment 1 S○14230-4:2000 Road vehicles -Keyword protocol 2000 for diagnostic systems -Part 4: Requirements for emissions-related systems So15031-5 Road vehicles-Communication between vehicle and external test equipment for emissions-related diagnostics-Part 5: Emissions related diagnostic services so15765-2 Road vehicles-Diagnostics communication over Controller Area Networks(DOCAN) Part 2: Transport protocol and network layer services lS15765-4 Road vehicles-Diagnostics communication over Controller Area Networks(DOCAN) Part 4: Requirements for emissions-related systems SAE J1979 Revised feb2012 Page 9 of 128 3. TERMS DEFINITIONS. SYMBOLS AND ABBREVIATED TERMS 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in SAE J1930, Iso 14229-2, ISo 14230-2, and Iso 15765-2 and the following apply 3.1.1 Absolute throttle position sensor Value intended to represent the throttle opening NOTE: For systems where the output is proportional to the input voltage, this value is the percent of maximum input signal. For systems where the output is inversely proportional to the input voltage, this value is 100 minus the percent of maximum input signal. Throttle position at idle usually indicates greater than%, and throttle position at wide open throttle usually indicates less than 100% 3.1.2 Bank Specific group of cylinders sharing a common control sensor, bank 1 always containing cylinder number 1, bank 2 the opposite bank NOTE: If there is only one bank, bank #1 DTCs are used, and the word bank may be omitted. With a single " bank system utilizing multiple sensors, bank #1 dTCs are used identifying the sensors as #1, #2 and #3 in order as they move further away from the cylinder. 3.1.3 Base fuel schedule The fuel calibration schedule programmed into the Powertrain Control Module or Prom when manufactured or when updated by some off-board source, prior to any learned on-board correction 3.1.4 Calculated Load value For spark ignition vehicles, typically an indication of the current airflow divided by peak airflow at wide open throttle as a function of rpm, where airflow is corrected for altitude and ambient temperature. Both spark ignition and compression ignition vehicles can use an alternate definition that substitutes engine torque in place of airflow in the calculation NOTE: This definition provides a unit-less number, and provides the service technician with an indication of the percent engine capacity that is being used 3.1.5 Client Function that is part of the tester and that makes use of the diagnostic services NoTE: a tester normally makes use of other functions such as data base management, specific interpretation man-machine interface 3.1.6 Continuous Monitoring Sampling at a rate no less than two samples per second. If for control purposes a computer input is sampled less frequently, the signal of the component may instead be evaluated each time sampling occurs SAE J1979 Revised feb2012 Page 10 of 128 3.1.7 Convention(Cvt) Column integrated in each message table which marks each parameter included NOTE: The following conventions are used: C=Conditional: the parameter marked"C"in a request/response message is present only under a condition specified in the bottom row of the message table. M=Mandatory the parameter marked"M"in a request/response message table is always present. U=User optional: the parameter marked"U in a request/response message table is or is not supplied, depending on dynamic usage by the manufacturer The convention recommends a mnemonic, which might be used for implementation In no case is the specified mnemonic a mandatory requirement for any implementation 3.1.8 Electronic Control Unit(ECU) Generic term for any electronic control unit 3.1.9 Emissions-related dtc A dtC which is set when a malfunction causes vehicle emissions to exceed legislated emission thresholds or is otherwise required to be set as specified by on-board diagnostics legislation(e.g. disables another part of the diagnostic system) Normally, the Mi is illuminated at the same time as the emissions-related dTC is set. The determination of which DTCs are emissions-related is made by the vehicle manufacturer for each vehicle, as specified by on-board diagnostic legislation 3.1.10 Fuel Trim(FT) Feedback adjustments to the base fuel schedule NOTE: Short-term fuel trim refers to dynamic or instantaneous adjustments. Long-term fuel trim refers to much more gradual adjustments to the fuel calibration schedule than short-term trim adjustments. These long-term adjustments compensate for vehicle differences and gradual changes that occur over time 3.1.11 Negative Numbers Signed binary, the most significant bit(MSB)of the binary number used to indicate positive(0)/ negative(1) NOTE 1: 2s complement: negative numbers are represented by complementing the binary number and then adding 1 EXAMPLE-0.99=8001hex=1000000000000001 binary 0=0000heX=0000000000000000 binary +099=7 FFf hex=011111111111111 binary NOTE2:(-0.99)+(+0.99)=0 3.1.12 Number Expressed by this symbol"# 3.1.13 P2, P3 Timing Parameter Application timing parameters for the ECU(s)and the external test equipment 3.1.14 P2 CAN min timing parameter CAN application timing parameter with the minimum value for the ECU(s) and the external test equipment to start the response message

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