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1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2007 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org J1979 REV. MAY2007 Issued 1991-12 Revised 2007-05 Superseding J1979 APR2002 (R) E/E Diagnostic Test Modes RATIONALE The prior version of SAE J1979 was technically equivalent to a draft version of ISO 15031-5. The ISO
5、 document was subsequently edited and published as an International Standard, including minor editorial changes. This version of SAE J1979 includes all of the editorial changes that were included in the published version of the ISO document. In addition, this document also includes new requirements
6、from the California Air Resources Board for the 2010 model year, including diesel engine vehicles. FOREWORD On-Board Diagnostic (OBD) regulations require passenger cars, and light and medium duty trucks, to support communication of a minimum set of diagnostic information to off-board “generic” test
7、equipment. This document 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. These messages are intended to be used by
8、 any external test equipment meeting the requirements of SAE J1978 for retrieval of OBD information from a vehicle. SAE J1979 was originally developed to meet U.S. OBD requirements for 1996 and later model year vehicles. ISO 15031- 5 was based on SAE J1979 and was intended to combine the U.S. requir
9、ements with European OBD requirements for 2000 and later model year vehicles. In addition, this document and later versions of the ISO document include new data reporting requirements included in proposed U.S. regulations, and also include specific requirements for retrieval of the same diagnostic i
10、nformation from vehicles equipped with ISO 15765-4 as a diagnostic data link. - - - SAE J1979 Revised MAY2007 - 2 - TABLE OF CONTENTS 1 SCOPE.3 1.1 Purpose3 1.2 Differences from SAE J1979 APR2002.3 2 NORMATIVE REFERENCES4 2.1 Applicable Publications4 3 TERMS AND DEFINITIONS5 4 SYMBOLS AND ABBREVIATE
11、D TERMS.7 5 TECHNICAL REQUIREMENTS.7 5.1 General Requirements.7 5.2 Diagnostic Service Requirements7 5.3 Diagnostic Message Format28 5.4 Allowance for Expansion and Enhanced Diagnostic Services 32 5.5 Definition of PIDs for Services $01 and $0232 5.6 Format of Data to be Displayed.32 6 DIAGNOSTIC SE
12、RVICE DEFINITION FOR ISO 9141-2, ISO 14230-4, AND SAE J1850.33 6.1 Service $01 Request Current Powertrain Diagnostic Data.33 6.2 Service $02 Request Powertrain Freeze Frame Data37 6.3 Service $03 Request Emission-Related Diagnostic Trouble Codes.41 6.4 Service $04 Clear/Reset Emission-Related Diagno
13、stic Information.45 6.5 Service $05 Request Oxygen Sensor Monitoring Test Results47 6.6 Service $06 Request On-Board Monitoring Test Results for Specific Monitored Systems51 6.7 Service $07 Request Emission-Related Diagnostic Trouble Codes Detected During Current or Last Completed Driving Cycle56 6.
14、8 Service $08 Request Control of On-Board System, Test or Component .57 6.9 Service $09 Request Vehicle Information.59 7 DIAGNOSTIC SERVICE DEFINITION FOR ISO 15765-471 7.1 Service $01 Request Current Powertrain Diagnostic Data.71 7.2 Service $02 Request Powertrain Freeze Frame Data76 7.3 Service $0
15、3 Request Emission-Related Diagnostic Trouble Codes.81 7.4 Service $04 Clear/Reset Emission-Related Diagnostic Information.83 7.5 Service $05 Request Oxygen Sensor Monitoring Test Results85 7.6 Service $06 Request On-Board Monitoring Test Results for Specific Monitored Systems85 7.7 Service $07 Requ
16、est Emission-Related Diagnostic Trouble Codes Detected During Current or Last Completed Driving Cycle95 7.8 Service $08 Request Control of On-Board System, Test or Component .96 7.9 Service $09 Request Vehicle Information.100 7.10 Service $0A Request Emission-Related Diagnostic Trouble Codes with Pe
17、rmanent Status.108 8 NOTES.110 8.1 Marginal Indicia110 Appendix A (Normative) PID (Parameter ID)/OBDMID (On-Board Monitor ID)/TID (Test ID)/INFOTYPE Supported Definition 111 Appendix B (Normative) PIDs (Parameter ID) for Services $01 and $02 Scaling and Definition.112 Appendix C (Normative) TIDs (Te
18、st ID) Scaling Description 188 Appendix D (Normative) OBDMIDs (On-Board Diagnostic Monitor ID) Definition for Service $06.189 Appendix E (Normative) Unit and Scaling Definition for Service $06 .193 Appendix F (Normative) TIDs (Test ID) for Service $08 Scaling and Definition.211 Appendix G (Normative
19、) INFOTYPEs for Service $09 Scaling and Definition212 - - - SAE J1979 Revised MAY2007 - 3 - 1. SCOPE 1.1 Purpose This document supersedes SAE J1979 Apr 2002, and is technically equivalent to ISO 15031-5:2006, with the addition of new capabilities required by revised regulations from the California A
20、ir Resources Board (see Section 1.2). 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
21、 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
22、 of diagnostic services, with corresponding content of request and response messages, to satisfy OBD regulations, 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
23、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 applicabi
24、lity of each section of this document for a specific vehicle, engine, model year and region. This document is based on the Open Systems Interconnection (OSI) Basic Reference Model in accordance with ISO/IEC 7498 and ISO/IEC 10731 which structures communication systems into seven layers as shown in T
25、able 1. TABLE 1 - APPLICABILITY AND RELATIONSHIP BETWEEN DOCUMENTS Applicability OSI 7 Layer Emissions-Related Diagnostics - - - - 1.2 Differences from SAE J1979 APR2002 The following are the technical differences between this document and the preceding SAE J1979: APR2002. 1.2.1 Modifications to the
26、 ISO/DIS 15031-5:April 30, 2002 (basis for SAE J1979 APR2002) prior to publication of ISO 15031-5: 2006: Section 4 “Symbols and Abbreviated Terms” was added, which changed all subsequent section numbers Paragraph 5.2.2.4 Implementation guidance example for ISO 9141-2 and ISO 14230-4 protocols Paragr
27、aph 5.2.2.7 Implementation guidance example for ISO 15765-4 protocol Paragraph 5.2.4.3.5 Data not available test conditions for protocols: ISO 9141-2, ISO 14230-4 and SAE J1850 Paragraph 5.2.4.3.7 Data not available test conditions for protocol: ISO 15765-4 Diagnostics on CAN - - - SAE J1979 Revised
28、 MAY2007 - 4 - Paragraph 5.2.6 Invalid Signals Paragraphs 6.1.1 and 7.1.1 Added note about mandatory support of Service $01, PID $00 Paragraphs 6.6.1 and 7.6.1 Additional discussion for Service $06 data for OBD monitors that have multiple tests Paragraph 6.9.3.3 Additional description for the Messag
29、eCount parameter based on InfoType Paragraph 7.1.1, 7.2.1, 7.6.1, 7.8.1, and 7.9.1 Added clarification for support of requests containing multiple data items Paragraph 7.6.3.4 Example for Use of Standardized Test IDs for Misfire Monitor Paragraph 7.9.4.2 Added InfoType $0A for ECU name Paragraph B.2
30、 Added discussion of signals received via distributed networks Appendix B Added PIDs $4F to $5A Appendix G Added InfoTypes $09 and $0A for ECUNAME 1.2.2 Modifications since publication of ISO 15031-5:2006, and addition of new data requirements from the California Air Resources Board: Paragraph 7.2.4
31、.2 Added example Case #3 to clarify reporting of multiple freeze frames Section 7.10 Service $0A for ISO 15765-4 - Request Emission-Related Diagnostic Trouble Codes with Permanent Status Paragraph B.2 Clarification of signals received via distributed networks and added example figure Paragraph B.3 I
32、nferred Signals Paragraph B.4 Revised PID structure used for newer PIDs Appendix B Added Figure B2 that illustrates sensor and actuator definitions and locations Appendix B Updated PIDs $01 and $41 to include support for compression ignition engines (Byte B, bit 3 used to indicate different descript
33、ions for Byte C and Byte D) Appendix B Added Figure B3 to explain the use of PIDs $13 and $1D to determine how many data bytes will be reported for Service $01, PIDs $06 to $09 and PIDs $55 to $58. Appendix B Additional values and descriptions for PID $1C to specify OBD requirements Appendix B Consi
34、stent use of “LAMBDA” instead of “EQ_RAT” for external test equipment to display equivalence ratio for PIDs $24 to $2B, $34 to $3B, and $44 Appendix B Added PIDs $5B to $87 Appendix D Renamed “Oxygen Sensor” to “Exhaust Gas Sensor” in multiple OBDMIDs; Added OBD MIDs in the range between $85 to $99
35、and $AE to $B3 Appendix E Added Unit and Scaling IDs $34 to $39 and $B1 Appendix G and the example in Paragraph 7.9.4.2 Expanded InfoType $08 In-use Performance Tracking data for compression ignition engines; Modified InfoType $0A for ECUNAME 1.2.3 Additional differences: Minor rewording of Paragrap
36、hs 1 and 2 Use of “.” instead of “,” to indicate decimal values Some of the message examples for diagnostic service definitions have been modified to demonstrate different possible responses, and to include use of newly added data values NOTE: Both this document and the ISO 15031-5 document are inte
37、nded to satisfy the requirements of OBD requirements in the United States and Europe, and any other region that may adopt similar requirements in the future. Those regulations change with time, and often when a requirement is introduced in one region, it will later also become a requirement in anoth
38、er region. The ISO task force responsible for ISO 15031-5 and the SAE task force work closely together to maintain consistency in diagnostic reporting requirements in these two documents, and to ensure usability of these documents for all regions. The goal is to maintain identical technical content
39、in the two documents, but this document may need to change if additional capabilities are required for the U.S. before the ISO document can be modified to include those changes. 2. NORMATIVE REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the ex
40、tent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. - - - SAE J1979 Revised MAY2007 - 5 - 2.1.1 SAE Publications Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outsid
41、e 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 Trouble Code Definitions 2.1.2 ISO Documents Available from ANSI, 25 West 43
42、rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 9141-2: 1994 Road vehiclesDiagnostic systemsPart 2: CARB requirements for interchange of digital information ISO 9141-2: 1994/Amd.1:1996 Road vehiclesDiagnostic systemsPart 2: CARB requirements for interchange of digital inform
43、ation Amendment 1 ISO 14230-4:2000 Road vehiclesKeyword protocol 2000 for diagnostic systemsPart 4: Requirements for emissions-related systems ISO 15031-5:2006 Road vehiclesCommunication between vehicle and external test equipment for emissions-related diagnosticsPart 5: Emissions related diagnostic
44、 services ISO 15765-2 Road vehiclesDiagnostics on Controller Area Network (CAN)Part 2: Network layer services ISO 15765-4 Road vehiclesDiagnostics on Controller Area Network (CAN)Part 4: Requirements for emissions-related systems 3. TERMS AND DEFINITIONS For the purposes of this document, the terms
45、and definitions given in SAE J1930 and the following apply. 3.1 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 propo