汽车UDS诊断协议ISO14229英文版详细解读及使用指南

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ISO 14229-2:2013是汽车领域中关于统一诊断服务（UDS）的国际标准，针对汽车CAN总线诊断的协议进行了规范。该标准适用于所有类型的道路车辆，包括传统燃油车和电动车。本标准的发布旨在为汽车的诊断服务提供统一的国际化框架，从而简化诊断工具和设备的开发和部署，提高汽车诊断的效率和准确性。ISO 14229-2:2013的发布对于初次接触汽车CAN诊断的开发人员具有重要的参考价值。 ISO 14229-2:2013标准共分为两个部分，第一部分是关于诊断服务的通用规定，第二部分就是有关会话层服务的规定。本文主要围绕ISO 14229-2:2013的第二部分进行讨论。该标准规定了UDS协议中的会话层服务的相关内容，包括会话的建立和终止、消息的传输与处理、安全性和错误处理等方面。通过对会话层服务的规范，ISO 14229-2:2013为汽车诊断工具和设备的开发提供了具体的技术指南和规范要求。 ISO 14229-2:2013的发布受到国际标准化组织（ISO）的版权保护，确保了标准的权威和可靠性。该标准的内容和规定均经过多方专家的讨论和验证，具有较高的参考价值和实际指导意义。在国际汽车行业中，ISO 14229-2:2013已成为了诊断服务相关工作的重要参考依据，受到了广泛的关注和应用。 ISO 14229-2:2013标准的发布对于汽车CAN诊断相关领域的开发人员具有重要的意义。对于初次接触汽车CAN诊断的开发人员来说，通过研读并掌握ISO 14229-2:2013标准的内容，可以对UDS协议的相关知识和实际应用进行系统的了解和学习。通过ISO 14229-2:2013标准的指导，开发人员可以更加准确地把握汽车诊断服务的开发需求和技术要求，提高诊断工具和设备的适配性和性能表现。总之，ISO 14229-2:2013标准的发布填补了汽车CAN诊断领域的标准空白，为汽车诊断服务的统一化和国际化发展提供了重要的技术支撑和指导。该标准的发布对于提高汽车诊断服务的效率和准确性、促进汽车诊断工具和设备的发展和创新具有重要的推动作用。因此，建议相关领域的开发人员和研究人员密切关注ISO 14229-2:2013标准的相关内容，加强学习和交流，共同推动汽车诊断服务领域的进步与发展。

ISO 14229-2:2013(E)

6 Session layer services

6.1 General

The service interface defines a set of services that are needed to access the functions offered by the session

layer, i.e. transmission/reception of data and setting of protocol parameters.

All session layer services have the same general structure. The service primitives define how a service user

(e.g. diagnostic application) cooperates with a service provider (e.g. session layer). To define the services,

three types of service primitives are specified:

 a service request primitive S_Data.request, used by the higher application layer to pass control

information or data required to be transmitted to the session layer (i.e. the service provider is being

requested by the service user to process control information or to transmit data);

 a service indication primitive S_Data.indication, used by the session layer to pass status information and

received data to the higher application layer (i.e. the service user is being informed by the service

provider about an internal event of the session layer or the service request of a peer protocol layer entity

service user);

 a service confirmation primitive S_Data.confirm used by the session layer to pass status information to

the application layer (i.e. the service user is being informed by service provider about the result of a

preceding service request of the service user);

All session layer services have the same general format. Service primitives are written in the form:

service_name.type (

parameter A,

parameter B,

parameter C

[, parameter X, ...]

)

Where:

 "service_name" is the name of the service (e.g. S_Data),

 "type" indicates the type of the service primitive (e.g. request, indication, confirm),

 "parameter A, ..." is the S_PDU (Session layer Protocol Data Unit) as a list of values passed by the

service primitive (e.g. addressing information, Data, Length, Result),

 "parameter A, parameter B, parameter C" are mandatory parameters that shall be included in all service

calls,

 "[parameter X]" is an optional parameter that is included if specific conditions are fulfilled.

Provided by IHS under license with ISO

Sold to:DELPHI MTC, W1493842

Not for Resale,2013/6/14 18:26:32 GMT

No reproduction or networking permitted without license from IHS

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

ISO 14229-2:2013(E)

For all cases, the possibility of requesting an enhanced response-timing window by the server via a negative

response message, including a negative response code 0x78, shall be considered. The transport/network

layer services as defined in different ISO standards (e.g. ISO 15765-2 DoCAN or ISO 10681-2 CoFR) are

used to perform the diagnostic session management timing in the client and the server.

6.2 Specification of session layer service primitives

6.2.1 General

In order to describe the function of the session layer, services provided to higher layers and the internal

operations of the session layer have to be considered.

6.2.2 S_Data.request

The service primitive requests transmission of S_Data with S_Length number of bytes from the sender to the

receiver peer entities identified by the address information in S_SA, S_TA, S_TAtype, and S_AE. Each time

the S_Data.request service is called, the session layer shall signal the completion (or failure) of the message

transmission to the service user by means of the issuing of an S_Data.confirm service call.

S_Data.request (

S_Mtype,

S_SA,

S_TA,

S_TAtype,

[S_AE],

S_Data [Data#1, Data#2, …, Data#n ],

S_Length

)

6.2.3 S_Data.confirm

The S_Data.confirm service is issued by the session layer. The service primitive confirms the completion of an

S_Data.request service identified by the address information in S_SA, S_TA, S_TAtype, and S_AE. The

parameter S_Result provides the status of the service request.

S_Data.confirm (

S_Mtype,

S_SA,

S_TA,

S_TAtype,

[S_AE],

S_Result

)

6.2.4 S_Data.indication

The S_Data.indication service is issued by the session layer. The service primitive indicates S_Result events

and delivers S_Data with S_Length bytes received from a peer protocol entity identified by the address

information in S_SA, S_TA, S_TAtype to the adjacent upper layer.

Provided by IHS under license with ISO

Sold to:DELPHI MTC, W1493842

Not for Resale,2013/6/14 18:26:32 GMT

No reproduction or networking permitted without license from IHS

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

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