GB/T 41590.2-2022 English PDF (GBT41590.2-2022)

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GB/T 41590.2-2022: Road vehicles - Diagnostic communication over K-Line ((DoK-Line) - Part 2: Data link layer
GB/T 41590.2-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 35
GB/T 41590.2-2022 / ISO 14230-2.2016
Road Vehicles – Diagnostic Communication over K-Line
(DoK-Line) – Part 2.Data Link Layer
(ISO 14230-2.2016, IDT)
ISSUED ON. JULY 11, 2022
IMPLEMENTED ON. FEBRUARY 01, 2023
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 4
Introduction... 5
1 Scope... 7
2 Normative References... 7
3 Terms, Definitions, Symbols and Abbreviated Terms... 8
3.1 Terms and Definitions... 8
3.2 Symbols and abbreviated terms... 8
4 Conventions... 10
5 Document Overview... 10
6 Physical Bus Topology... 11
7 Data Link Layer Overview... 13
7.1 General... 13
7.2 Format description of data link layer services... 13
7.3 Services provided by the data link layer to higher layers... 13
7.4 Specification of DoK-Line data link layer service primitives... 15
7.5 Service data unit specification... 17
8 Protocol Initialization... 22
8.1 General... 22
8.2 Timing parameters for 5-BAUD_INIT... 22
8.3 Protocol determination... 23
8.4 Protocol specific key bytes... 32
9 Message Definition... 34
9.1 Message structure... 34
9.2 Message header... 35
9.3 Protocol data unit (PDU)... 38
9.4 Checksum byte (CS)... 38
10 Protocol Timing Requirements... 38
10.1 General timing measurement requirements... 38
10.2 Protocol timing parameter definition... 39
10.3 Inter-byte message timing... 40
10.4 Data link layer timing at T-Data interface... 41
11 Communication Services... 44
11.1 StartCommunication service... 44
11.2 StopCommunication service... 45
11.3 AccessTimingParameter service... 47
11.4 SendData service... 50
12 Data Collisions... 51
13 Error Handling... 51
13.1 Error handling during physical/functional 5-BAUD initialization... 51
13.2 Error handling during physical/functional FAST_INIT... 52
13.3 Error handling after physical/functional initialization... 54
Annex A (Normative) Server and Client Addresses for 5-BAUD_INIT... 56
A.1 Physical addresses... 56
A.2 Functional addresses... 56
Annex B (Informative) Recommended Server and Client Addresses... 57
Annex C (Informative) Protocol Comparison of Initialization Sequence... 58
Bibliography... 59
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document was Part 2 of GB/T 41590 Road Vehicles – Diagnostic Communication over K-
Line (DoK-Line). GB/T 41590 has published the following parts.
--- Part 1.Physical Layer;
--- Part 2.Data Link Layer;
--- Part 3.Application Layer;
--- Part 4.Requirements for Emission-Related Systems.
This Document equivalently adopts ISO 14230-2.2016 Road Vehicles – Diagnostic
Communication over K-Line (DoK-Line) – Part 2.Data Link Layer.
This Document made the minimum editorial modifications.
--- Include the technical corrigendum (change three types in 7.3 of ISO 14230-2.2016 into
four types).
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by the Ministry of Industry and Information Technology of the
People’s Republic of China.
This Document shall be under the jurisdiction of National Technical Committee of Auto
Standardization (SAC/TC 114).
Drafting organizations of this Document. Zhejiang Geely Holding Group Co., Ltd.; Dongfeng
Motor Group Company Limited; Great Wall Motor Company Limited; China FAW Group Co.,
Ltd.; Huizhou Desay SV Automotive Co., Ltd.; Pan-Asia Technical Automotive Center Co.,
Ltd.; Xingkedi Technology (Taizhou) Co., Ltd.; FAW-Volkswagen Automotive Co., Ltd.; SAIC
GM Wuling Automobile Company Limited; CATARC Automotive Test Center (Tianjin) Co.,
Ltd.; and CATARC (Tianjin) Automotive Engineering Research Institute Co., Ltd.
Chief drafting staffs of this Document. Hu Zhengnan, Niu Yujiao, Ji Jiemei, Xia Liping, Zhou
Wenfeng, Sun Lei, Li Yan, Liu Bin, Hong Yu, Wu Yuzhi, Sun Wang, Shi Xiaomi, Zhang Dingyu,
Gao Changbin, Liu Le, Han Guangsheng, Wang Jie, Lu Yuhang, and Zhou Jiancang.
Road Vehicles – Diagnostic Communication over K-Line
(DoK-Line) – Part 2.Data Link Layer
1 Scope
This Document specifies data link layer services tailored to meet the requirements of UART-
based vehicle communication systems on K-Line as specified in ISO 14230-1.It has been
defined in accordance with the diagnostic services established in ISO 14229-1 and ISO 15031-
5, but is not limited to use with them and is also compatible with most other communication
needs for in-vehicle networks. The protocol specifies an unconfirmed communication.
The diagnostic communication over K-Line (DoK-Line) protocol supports the standardized
service primitive interface as specified in ISO 14229-2.
This Document provides the data link layer services to support different application layer
implementations like the following.
--- enhanced vehicle diagnostics (emissions-related system diagnostics beyond legislated
functionality, non-emissions-related system diagnostics);
--- emissions-related OBD as specified in ISO 15031, SAE J1979-DA and SAE J2012-DA;
--- in addition, this document clarifies the differences in initialization for K-line protocols
defined in ISO 9141 and ISO 14230.This is important since a server supports only one
of the protocols mentioned above and the client has to handle the coexistence of all
protocols during the protocol determination procedure.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
ISO 14230-4 ROAD Vehicles – Diagnostic Systems – Keyword Protocol 2000 – Part 4.
Requirements for Emission-Related Systems
NOTE. GB/T 41590.4-2022 Road Vehicles - Diagnostic Communication over K-Line (DoK-Line)
- Part 4.Requirements for Emission-Related Systems (ISO 14230-4.2000, IDT)