ISO 14229-2-2021

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

services (UDS) —

Part 2:

Session layer services

Véhicules routiers — Services de diagnostic unifiés (SDU) —

Partie 2: Services de la couche session

INTERNATIONAL

STANDARD

ISO

14229-2

Second edition

2021-10

Reference number

ISO 14229-2:2021(E)











CP 401 • Ch. de Blandonnet 8



Phone: +41 22 749 01 11



Website: www.iso.org

Published in Switzerland

Foreword ..........................................................................................................................................................................................................................................v

 .............................................................................................................................................................................................................................. vi

1 Scope ................................................................................................................................................................................................................................. 1

  ..................................................................................................................................................................................... 1

  .................................................................................................................................................................................... 1

 .......................................................................................................................................................... 2

  ......................................................................................................................................................................................................... 2

4.2 Abbreviated terms .............................................................................................................................................................................. 2

  ............................................................................................................................................................................................................... 2

6 Session layer services ..................................................................................................................................................................................... 2

6.1 Service interface ................................................................................................................................................................................... 2

6.2 Service interface parameters .................................................................................................................................................... 3

6.3 Service interface primitives ....................................................................................................................................................... 3

 ................................................ 4

  ................................................................ 4

  ............ 5

7.3 SI — S_PDU mapping onto T_PDU and vice versa for message transmission ................................. 5

 ...................................................................................................................................................................................... 6

7.5 SI — S_Data.ind ...................................................................................................................................................................................... 7

7.6 SI — S_Data.conf ................................................................................................................................................................................... 7

  ............................................................................................................................................... 7

  ........................................................................................................................................................................................... 7

  ......................................................................................................................................................... 7

  ................................................................................................................. 7

  ................................................................................................ 8

  ......................................................................................................................... 8

  ....................................................................................................................... 8

  ............................................................................................................... 8

  ......................................................................................................... 8

  ........................................................................................................................... 9

  ..................................................................................................................................... 9

  .................................................................................................................................................................. 9

  ................................................................................................................... 9

9.1.1 Server ........................................................................................................................................................................................... 9

9.1.2 Client .......................................................................................................................................................................................... 10

  ....................................................................... 11

 tP4_Server without enhanced response timing .......................................................................... 16

 tP4_Server with enhanced response timing ................................................................................... 17

  ....................................................... 19

  .................................................................................................... 20

9.7 Error handling ..................................................................................................................................................................................... 21

  ................................................................................................................................ 23

  ............................................................................................................................................................. 23

  ................................. 23

  ......................................... 24

       

timing ........................................................................................................................................................................................ 24

  ................................................................. 26

10.2 Functional communication ....................................................................................................................................................... 31

10.2.1 Functional communication during defaultSession – without SOM.ind .......................... 31

ISO 14229-2:2021(E)

iii

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标签： #ISO

摘要：

ISO 14229-2-2021是国际标准化组织发布的最新版本统一诊断服务（UDS）协议规范，专注于道路车辆诊断通信的会话层服务。该标准定义了车辆电子控制单元（ECU）与诊断工具之间的数据链路层交互机制，包括诊断会话控制、安全访问、定时参数和网络层服务原语等核心内容。适用于汽车电子工程师、诊断协议开发人员及车载通信系统测试人员，帮助确保车辆诊断系统在不同制造商设备间的互操作性与合规性。文档详细规定了物理层与网络层之间的服务接口，为UDS实现提供统一的会话管理和错误处理框架，是汽车OBD诊断、远程

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ISO 14229-2-2021

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