The author describes diagnostic principles of the OBD(On Board Diagnostic)system for sensors, ECU, actuators and SWS(Smart Wiring System).

阐述车载自诊断系统对传感器、电控单元、执行器和多路传输系统的诊断原理；

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SCR technology through the vehicle diagnostic system (OBD), vehicle emissions can be monitored in real time, display fault information in a timely manner to ensure the normal operation of the system.

SCR技术通过车载诊断系统(OBD)，可以对汽车的排放进行实时监控，及时地显示故障信息，以确保系统的正常运转。

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"OBD" means an on-board diagnostic system for emission control which shall have the capability of identifying the likely area of malfunction by means of fault codes stored in computer memory.

“车载诊断(OBD)系统”指用于排放控制的车载诊断系统，该系统具有通过储存在计算机存储器中的故障代码识别可能故障区域的功能。

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