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http://standards.sae.org/J1979_201702

SURFACE VEHICLE

STANDARD

J1979™

FEB2017

Issued 1991-12

Revised 2017-02

Superseding J1979 AUG2014

(R) E/E Diagnostic Test Modes

RATIONALE

Changes have been made to keep pace Californian Air Resources Board legislation: Title 13, CCR Section 1968.2.

Malfunction and Diagnostic System Requirements--2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks,

and Medium-Duty Vehicles and Engines and Section 1971.1. On-Board Diagnostic System Requirements--2010 and

Subsequent Model-Year Heavy-Duty Engines. The majority of the changes are captured in the J1979DA document.

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 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 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. requirements 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 information from vehicles equipped with ISO 15765-4 as a diagnostic data link.

Provided by IHS Markit under license with SAE

Licensee=Hyundai Motor - South Korea/5947999001, User=sungjoon, park

Not for Resale, 03/16/2018 01:08:43 MDT

No reproduction or networking permitted without license from IHS

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SAE INTERNATIONAL J1979™ FEB2017 Page 2 of 143

TABLE OF CONTENTS

SCOPE........................................................................................................................................................ 10

1.1 Introduction ................................................................................................................................................. 10

1.2 Document Scope......................................................................................................................................... 13

REFERENCES............................................................................................................................................ 14

2.1 Applicable Documents ................................................................................................................................ 14

2.1.1 SAE Publications......................................................................................................................................... 14

2.1.2 ISO Documents........................................................................................................................................... 15

TERMS, DEFINITIONS, SYMBOLS AND ABBREVIATED TERMS .......................................................... 16

3.1 Terms and Definitions ................................................................................................................................. 16

3.2 Abbreviated Terms...................................................................................................................................... 18

CONVENTIONS.......................................................................................................................................... 19

DOCUMENT OVERVIEW ........................................................................................................................... 20

TECHNICAL REQUIREMENTS.................................................................................................................. 21

6.1 General Requirements ................................................................................................................................ 21

6.2 Diagnostic Service Requirements............................................................................................................... 21

6.2.1 Multiple Responses to a Single Data Request ........................................................................................... 21

6.2.2 Application Timing Parameter Definition..................................................................................................... 21

6.2.3 Minimum Time Between Requests from External Test Equipment ............................................................ 31

6.2.4 Data Not Available ...................................................................................................................................... 37

6.2.5 Maximum Values......................................................................................................................................... 48

6.2.6 Invalid Signals ............................................................................................................................................. 48

6.3 Diagnostic Message Format ....................................................................................................................... 48

6.3.1 Addressing Method ..................................................................................................................................... 48

6.3.2 Maximum Message Length ......................................................................................................................... 48

6.3.3 Request/Response Message Format ......................................................................................................... 48

6.3.4 Response Code Parameter Definition ........................................................................................................ 50

6.3.5 Header Byte Definition of ISO 9141-2, ISO 14230-4, and SAE J1850....................................................... 51

6.3.6 Header Byte Definition of ISO 15765-4....................................................................................................... 51

6.3.7 Data Bytes Definition of ISO 9141-2, ISO 14230-4, SAE J1850, and ISO 15765-4................................... 51

6.3.8 Non-data Bytes Included in Diagnostic Messages with SAE J1850........................................................... 52

6.3.9 Non-data Bytes Included in Diagnostic Messages with ISO 9141-2 and ISO 14230-4.............................. 52

6.4 Byte Order Convention................................................................................................................................ 52

6.5 Allowance for Expansion and Enhanced Diagnostic Services.................................................................... 52

6.6 Definition of PIDs for Services $01 and $02 ............................................................................................... 52

6.7 Format of Data to be Displayed .................................................................................................................. 52

DIAGNOSTIC SERVICE DEFINITION FOR ISO 9141-2, ISO 14230-4, AND SAE J1850........................ 54

7.1 Service $01 - Request Current Powertrain Diagnostic Data....................................................................... 54

7.1.1 Functional Description................................................................................................................................. 54

7.1.2 Message Data Bytes ................................................................................................................................... 54

7.1.3 Parameter Definition ................................................................................................................................... 55

7.1.4 Message Example....................................................................................................................................... 55

7.2 Service $02 - Request Powertrain Freeze Frame Data.............................................................................. 58

7.2.1 Functional Description................................................................................................................................. 58

7.2.2 Message Data Bytes ................................................................................................................................... 59

7.2.3 Parameter Definition ................................................................................................................................... 60

7.2.4 Message Example....................................................................................................................................... 60

7.3 Service $03 - Request Emission-Related Diagnostic Trouble Codes ........................................................ 62

7.3.1 Functional Description................................................................................................................................. 62

7.3.2 Message Data Bytes ................................................................................................................................... 63

7.3.3 Parameter Definition ................................................................................................................................... 64

7.3.4 Message Example....................................................................................................................................... 64

7.4 Service $04 - Clear/Reset Emission-Related Diagnostic Information ........................................................ 67

Provided by IHS Markit under license with SAE

Licensee=Hyundai Motor - South Korea/5947999001, User=sungjoon, park

Not for Resale, 03/16/2018 01:08:43 MDT

No reproduction or networking permitted without license from IHS

SAE INTERNATIONAL J1979™ FEB2017 Page 3 of 143

7.4.1 Functional Description................................................................................................................................. 67

7.4.2 Message Data Bytes ................................................................................................................................... 67

7.4.3 Parameter Definition ................................................................................................................................... 67

7.4.4 Message Example....................................................................................................................................... 68

7.5 Service $05 - Request Oxygen Sensor Monitoring Test Results ............................................................... 68

7.5.1 Functional Description................................................................................................................................. 68

7.5.2 Message Data Bytes ................................................................................................................................... 69

7.5.3 Parameter Definition ................................................................................................................................... 70

7.5.4 Message Example....................................................................................................................................... 71

7.6 Service $06 - Request On-Board Monitoring Test Results for Specific Monitored Systems...................... 73

7.6.1 Functional Description................................................................................................................................. 73

7.6.2 Message Data Bytes ................................................................................................................................... 74

7.6.3 Parameter Definition ................................................................................................................................... 75

7.6.4 Message Example....................................................................................................................................... 76

7.7 Service $07 - Request Emission-Related Diagnostic Trouble Codes Detected During Current

or Last Completed Driving Cycle ................................................................................................................ 78

7.7.1 Functional Description................................................................................................................................. 78

7.7.2 Message Data Bytes ................................................................................................................................... 78

7.7.3 Parameter Definition ................................................................................................................................... 79

7.7.4 Message Example....................................................................................................................................... 79

7.8 Service $08 - Request Control of On-Board System, Test or Component ................................................. 79

7.8.1 Functional Description................................................................................................................................. 79

7.8.2 Message Data Bytes ................................................................................................................................... 79

7.8.3 Parameter Definition ................................................................................................................................... 81

7.8.4 Message Example....................................................................................................................................... 81

7.9 Service $09 - Request Vehicle Information ................................................................................................ 82

7.9.1 Functional Description................................................................................................................................. 82

7.9.2 Message Data Bytes ................................................................................................................................... 82

7.9.3 Parameter Definition ................................................................................................................................... 83

7.9.4 Message Example....................................................................................................................................... 83

DIAGNOSTIC SERVICE DEFINITION FOR ISO 15765-4 ......................................................................... 99

8.1 Service $01 - Request Current Powertrain Diagnostic Data....................................................................... 99

8.1.1 Functional Description................................................................................................................................. 99

8.1.2 Message Data Bytes ................................................................................................................................... 99

8.1.3 Parameter Definition ................................................................................................................................. 101

8.1.4 Message Example..................................................................................................................................... 101

8.2 Service $02 - Request Powertrain Freeze Frame Data............................................................................ 104

8.2.1 Functional Description............................................................................................................................... 104

8.2.2 Message Data Bytes ................................................................................................................................. 105

8.2.3 Parameter Definition ................................................................................................................................. 107

8.2.4 Message Example..................................................................................................................................... 107

8.3 Service $03 - Request Emission-Related Diagnostic Trouble Codes ...................................................... 110

8.3.1 Functional Description............................................................................................................................... 110

8.3.2 Message Data Bytes ................................................................................................................................. 110

8.3.3 Parameter Definition ................................................................................................................................. 111

8.3.4 Message Example..................................................................................................................................... 111

8.4 Service $04 - Clear/Reset Emission-Related Diagnostic Information ...................................................... 112

8.4.1 Functional Description............................................................................................................................... 112

8.4.2 Message Data Bytes ................................................................................................................................. 112

8.4.3 Parameter Definition ................................................................................................................................. 113

8.4.4 Message Example..................................................................................................................................... 113

8.5 Service $05 - Request Oxygen Sensor Monitoring Test Results ............................................................. 114

8.6 Service $06 - Request On-Board Monitoring Test Results for Specific Monitored Systems.................... 114

8.6.1 Functional Description............................................................................................................................... 114

8.6.2 Message Data Bytes ................................................................................................................................. 115

8.6.3 Parameter Definition ................................................................................................................................. 117

8.6.4 Message Example..................................................................................................................................... 122

8.7 Service $07 - Request Emission-Related Diagnostic Trouble Codes Detected During Current

or Last Completed Driving Cycle .............................................................................................................. 125

Provided by IHS Markit under license with SAE

Licensee=Hyundai Motor - South Korea/5947999001, User=sungjoon, park

Not for Resale, 03/16/2018 01:08:43 MDT

No reproduction or networking permitted without license from IHS

--`,`,,`,```,`,,,,``,,,````,```,-`-`,,`,,`,`,,`---

SAE INTERNATIONAL J1979™ FEB2017 Page 4 of 143

8.7.1 Functional Description............................................................................................................................... 125

8.7.2 Message Data Bytes ................................................................................................................................. 125

8.7.3 Parameter Definition ................................................................................................................................. 126

8.7.4 Message Example..................................................................................................................................... 126

8.8 Service $08 - Request Control of On-Board System, Test or Component ............................................... 126

8.8.1 Functional Description............................................................................................................................... 126

8.8.2 Message Data Bytes ................................................................................................................................. 127

8.8.3 Parameter Definition ................................................................................................................................. 128

8.8.4 Message Example..................................................................................................................................... 128

8.9 Service $09 - Request Vehicle Information .............................................................................................. 129

8.9.1 Functional Description............................................................................................................................... 129

8.9.2 Message Data Bytes ................................................................................................................................. 130

8.9.3 Parameter Definition ................................................................................................................................. 132

8.9.4 Message Example..................................................................................................................................... 132

8.10 Service $0A - Request Emission-Related Diagnostic Trouble Codes with Permanent Status................. 142

8.10.1 Functional Description............................................................................................................................... 142

8.10.2 Message Data Bytes ................................................................................................................................. 143

8.10.3 Parameter Definitions................................................................................................................................ 143

8.10.4 Message Example..................................................................................................................................... 143

NOTES...................................................................................................................................................... 143

9.1 Revision Indicator...................................................................................................................................... 143

FIGURE 1 SAE DIGITAL ANNEX DOCUMENT REFERENCE ................................................................................... 12

FIGURE 2 EMISSIONS-RELATED OBD ON ISO 15765-4, SAE J1850, ISO 9141-2,

ISO 14230-4 DOCUMENT REFERENCE ACCORDING TO OSI MODEL ................................................ 20

FIGURE 3 ISO 9141-2 AND ISO 14230-4 PROTOCOL CLIENT AND SERVER TIMING BEHAVIOR ...................... 26

FIGURE 4 FUNCTIONAL OBD COMMUNICATION - DEFAULT RESPONSE TIMING ............................................. 29

FIGURE 5 FUNCTIONAL OBD COMMUNICATION - ENHANCED RESPONSE TIMING.......................................... 31

FIGURE 6 ISO 9141-2 (KEY BYTES: 0X08 0X08) AND ISO 14230-4 APPLICATION TIMING

PARAMETER OVERVIEW ......................................................................................................................... 31

FIGURE 7 SAE J1850 APPLICATION TIMING PARAMETER OVERVIEW................................................................ 32

FIGURE 8 ISO 15765-4 APPLICATION TIMING PARAMETER (SINGLE FRAME RESPONSE MESSAGES)

OVERVIEW................................................................................................................................................. 34

FIGURE 9 ISO 15765-4 FUNCTIONAL OBD ON CAN COMMUNICATION - MULTIPLE FRAME RESPONSE

MESSAGES NOT FINISHED WITHIN P2

CAN

............................................................................................. 35

FIGURE 10 ISO 15765-4 FUNCTIONAL OBD ON CAN COMMUNICATION - MULTIPLE FRAME RESPONSE

FINISHED WITHIN P2

CAN

........................................................................................................................... 36

FIGURE 11 EXAMPLE OF EXTERNAL TEST EQUIPMENT CONNECTED TO TWO (2) OBD ECUS ....................... 37

FIGURE 12 ISO 9141-2 (KEY BYTES: 0X08 0X08) DATA NOT AVAILABLE WITHIN P2 TIMING

HANDLING OVERVIEW ............................................................................................................................. 39

FIGURE 13 ISO 14230-4 - NRC $78 HANDLING OVERVIEW ..................................................................................... 40

FIGURE 14 SAE J1850 - DATA NOT AVAILABLE WITHIN P2 TIMING HANDLING OVERVIEW............................... 41

FIGURE 15 ISO 15765-4 - NRC $78 HANDLING OVERVIEW ..................................................................................... 46

FIGURE 16 BIT POSITION WITHIN A DATA BYTE ...................................................................................................... 52

FIGURE 17 DIAGNOSTIC TROUBLE CODE ENCODING EXAMPLE DTC P0143...................................................... 62

FIGURE 18 TEST ID VALUE EXAMPLE ....................................................................................................................... 71

FIGURE 19 DIAGNOSTIC TROUBLE CODE ENCODING EXAMPLE DTC P0143.................................................... 110

TABLE 1 LEGISLATED EMISSIONS-RELATED OBD/WWH-OBD DIAGNOSTIC SPECIFICATIONS

APPLICABLE TO THE OSI LAYERS ......................................................................................................... 11

TABLE 2 DEFINITION ISO 9141-2 APPLICATION TIMING PARAMETER VALUES............................................... 22

TABLE 3 DEFINITIONS OF ISO 14230-4 APPLICATION TIMING PARAMETER VALUES .................................... 23

TABLE 4 MAPPING OF T_PDU SERVICE PRIMITIVES ONTO DL_PDU SERVICE PRIMITIVES ......................... 24

TABLE 5 MAPPING OF T_PDU PARAMETER ONTO DL_PDU PARAMETER....................................................... 24

TABLE 6 DEFINITION OF SAE J1850 APPLICATION TIMING PARAMETER VALUES ......................................... 26

TABLE 7 DEFINITION OF ISO 15765-4 APPLICATION TIMING PARAMETER VALUES....................................... 27

TABLE 8 MAPPING OF T_PDU SERVICE PRIMITIVES ONTO N_PDU SERVICE PRIMITIVES ........................... 28

TABLE 9 MAPPING OF T_PDU PARAMETER ONTO N_PDU PARAMETER......................................................... 28

Provided by IHS Markit under license with SAE

Licensee=Hyundai Motor - South Korea/5947999001, User=sungjoon, park

Not for Resale, 03/16/2018 01:08:43 MDT

No reproduction or networking permitted without license from IHS

--`,`,,`,```,`,,,,``,,,````,```,-`-`,,`,,`,`,,`---

SAE INTERNATIONAL J1979™ FEB2017 Page 5 of 143

TABLE 10 PROPER RESPONSE FROM SERVER/ECU WITH ISO 9141-2, ISO 14230-4

AND SAE J1850 PROTOCOL .................................................................................................................... 42

TABLE 11 PROPER RESPONSE FROM SERVER/ECU FOR ISO 15765-4 PROTOCOL ........................................ 47

TABLE 12 REQUEST MESSAGE FORMAT FOR ISO 9141-2, ISO 14230-4, SAE J1850, ISO 15765-4 .................. 49

TABLE 13 POSITIVE RESPONSE MESSAGE FORMAT FOR ISO 9141-2, ISO 14230-4, SAE J1850 .................... 49

TABLE 14 POSITIVE RESPONSE MESSAGE FORMAT FOR ISO 15765-4 ............................................................. 49

TABLE 15 NEGATIVE RESPONSE MESSAGE FORMAT FOR ISO 14230-4, ISO 15765-4 ..................................... 50

TABLE 16 NEGATIVE RESPONSE CODE DEFINITION............................................................................................ 50

TABLE 17 DIAGNOSTIC MESSAGE FORMAT FOR ISO 9141-2, ISO 14230-4, SAE J1850.................................... 51

TABLE 18 DIAGNOSTIC MESSAGE FORMAT FOR ISO 15765-4 ............................................................................ 51

TABLE 19 FORMAT OF DATA TO BE DISPLAYED ................................................................................................... 53

TABLE 20 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE

(READ SUPPORTED PIDS) ...................................................................................................................... 54

TABLE 21 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE

(REPORT SUPPORTED PIDS).................................................................................................................. 54

TABLE 22 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE

(READ PID VALUE) .................................................................................................................................... 55

TABLE 23 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE

(REPORT PID VALUE) ............................................................................................................................... 55

TABLE 24 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE ............................... 56

TABLE 25 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 56

TABLE 26 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 56

TABLE 27 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE ............................... 56

TABLE 28 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 56

TABLE 29 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE ............................... 57

TABLE 30 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 57

TABLE 31 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 57

TABLE 32 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE ............................... 58

TABLE 33 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 58

TABLE 34 REQUEST POWERTRAIN FREEZE FRAME DATA REQUEST MESSAGE

(READ SUPPORTED PIDS)....................................................................................................................... 59

TABLE 35 REQUEST POWERTRAIN FREEZE FRAME DATA RESPONSE MESSAGE

(REPORT SUPPORTED PIDS).................................................................................................................. 59

TABLE 36 REQUEST POWERTRAIN FREEZE FRAME DATA REQUEST MESSAGE

(READ FREEZE FRAME PID VALUE) ....................................................................................................... 59

TABLE 37 REQUEST POWERTRAIN FREEZE FRAME DATA RESPONSE MESSAGE

(REPORT FREEZE FRAME PID VALUE) .................................................................................................. 59

TABLE 38 REQUEST POWERTRAIN FREEZE FRAME DATA REQUEST MESSAGE ............................................ 60

TABLE 39 REQUEST POWERTRAIN FREEZE FRAME DATA RESPONSE MESSAGE.......................................... 61

TABLE 40 REQUEST POWERTRAIN FREEZE FRAME DATA REQUEST MESSAGE ............................................ 61

TABLE 41 REQUEST POWERTRAIN FREEZE FRAME DATA RESPONSE MESSAGE

(SERVICE $02, PID $02, FRAME # $00) ................................................................................................... 61

TABLE 42 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE (PID $01) .............. 63

TABLE 43 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE (PID $01)............ 63

TABLE 44 REQUEST EMISSION-RELATED DTC REQUEST MESSAGE ................................................................ 63

TABLE 45 REQUEST EMISSION-RELATED DTC RESPONSE MESSAGE.............................................................. 63

TABLE 46 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA REQUEST MESSAGE ............................... 64

TABLE 47 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 64

TABLE 48 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 64

TABLE 49 REQUEST CURRENT POWERTRAIN DIAGNOSTIC DATA RESPONSE MESSAGE ............................ 65

TABLE 50 REQUEST EMISSION-RELATED DIAGNOSTIC TROUBLE CODES REQUEST MESSAGE ................. 65

TABLE 51 REQUEST EMISSION-RELATED DIAGNOSTIC TROUBLE CODES RESPONSE MESSAGE............... 65

TABLE 52 REQUEST EMISSION-RELATED DIAGNOSTIC TROUBLE CODES RESPONSE MESSAGE............... 65

TABLE 53 REQUEST EMISSION-RELATED DIAGNOSTIC TROUBLE CODES RESPONSE MESSAGE............... 66

TABLE 54 REQUEST EMISSION-RELATED DIAGNOSTIC TROUBLE CODES RESPONSE MESSAGE............... 66

TABLE 55 CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION REQUEST MESSAGE ............... 67

TABLE 56 CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION RESPONSE MESSAGE............. 67

TABLE 57 CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION REQUEST MESSAGE ............... 68

TABLE 58 CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION RESPONSE MESSAGE............. 68

TABLE 59 CLEAR/RESET EMISSION-RELATED DIAGNOSTIC INFORMATION RESPONSE MESSAGE............. 68

Provided by IHS Markit under license with SAE

Licensee=Hyundai Motor - South Korea/5947999001, User=sungjoon, park

Not for Resale, 03/16/2018 01:08:43 MDT

No reproduction or networking permitted without license from IHS

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生活教会我们

2023-07-25

这份文件简洁明了地呈现了关于J1979-2017方面的重要信息，值得一读。
人亲卓玛

2023-07-25

这个标准文件很系统地阐述了J1979-2017的内容，非常实用。
士多霹雳酱

2023-07-25

这个文件提供了对J1979-2017的详细解释，对于相关行业的从业人员非常有参考价值。
一筐猪的头发丝

2023-07-25

通过阅读这个标准文件，对J1979-2017的理解会更加深入，给了我很多启发。
三更寒天

2023-07-25

该文件对J1979-2017的要求进行了准确描述，易于理解和操作。

kindred.wu

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