Zed bull  
this approach be called intuitive diagnoses, also is the traditional approach the domestic general adopt. While utilize auto diagnostic tool, device to check the automobile’s structure parameter, putout process and putout parameter(such as interval, size, shape, related position, vacuum degree, fuel consumption, power and so on) to ensure the breakdown this way is objective diagnoses. Current foreign gradually apply the electronic device to the auto diagnoses, our country also exploring.