ISO 22900-1:20 08提供了一个框架，允许所有车辆制造商的诊断和重新编程软件应用程序灵活地使用来自多个工具供应商的多个车辆通信接口（VCI）。该系统使每个车辆制造商能够支持所有车辆通信接口，以执行诊断并控制其车辆中的电子控制单元(ECU)的编程序列。 ISO 22900-1:20 08描述了适用的用例，以证明ISO 22900的优势。它还规定了诊断和编程车辆通信接口设计者应遵循的设计要求。设计要求分为不同级别的一致性类别，以提供: “软件合规性”，对现有VCI的一组要求，这些VCI是软件合规性的，但不是硬件合规性的；“电气合规性”，定义允许系统集成商将多于一个VCI协议模块连接到车辆诊断连接器和主机系统的所有信号和电气接口； “机械合规性”，定义VCI协议模块上的标准连接器以与车辆数据链路连接器（DLC）和主机系统接口，以及定义布线概念以支持与一个以上VCI协议模块接口。 ISO 22900-1:20 08中规定的技术要求受到法律权威关于“车辆OBD和编程”要求的影响。 模块化车辆通信接口硬件设计要求将为车辆通信接口制造商提供适当的开发指导，以满足法律权威和汽车制造商关于供应商间可操作性的要求。

ISO 22900-1:2008 provides the framework to allow diagnostic and reprogramming software applications from all vehicle manufacturers the flexibility to work with multiple vehicle communication interfaces (VCI) from multiple tool suppliers. This system enables each vehicle manufacturer to support all vehicle communication interfaces to perform diagnostics and to control the programming sequence for electronic control units (ECUs) in their vehicles. ISO 22900-1:2008 describes the applicable use cases to justify the benefits of ISO 22900. It also specifies the design requirements to be followed by diagnostic and programming vehicle communication interface designers. The design requirements are categorized into different levels of conformance classes to provide:

• “software compliance”, a set of requirements for existing VCIs, which are software but not hardware compliant;
• “electrical compliance”, defining all signals and electrical interfaces that allow a system integrator to connect more than one VCI Protocol Module to the vehicle diagnostic connector and the host system;
• “mechanical compliance”, defining standard connectors on the VCI Protocol Module to interface to the vehicle Data Link Connector (DLC) and the host system, as well as defining a cabling concept to support interfacing more than one VCI Protocol Module.

The technical requirements specified in ISO 22900-1:2008 have been influenced by the requirements of legal authority with regard to “vehicle OBD and programming”. The Modular Vehicle Communication Interface hardware design requirements will provide appropriate development guidance for vehicle communication interface manufacturers to meet legal authority and automotive manufacturer demands with regard to inter-vendor operability.