A80 BT Intelligent Diagnosis System
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Chapter IV Additional Information
1.
Description of OBDII and the function of sensor components
1.1 OBDII function description
In 1994, the American Society of Automotive Engineers proposed
the second generation of self-diagnosis system for on-board faults,
namely OBD-II. OBD-II unifies the form of the fault detection socket,
the number and meaning of the fault code, and the reading method of the
fault code, and adds a strong data stream detection function.However, the
fault code and data flow can only be obtained with the microcomputer
fault detector, and the fault code cannot be read manually. So far, after
the 1996 production of vehicles in the United States, the introduction of
vehicles produced by American technology (such as Shanghai Buick, etc.)
and vehicles sold to the United States, only OBD-II has been adopted,