What is the function of the self-diagnosis system?

1 Answers
ZaneLee
07/30/25 5:57am
The function of the self-diagnosis system is to monitor the working status of various parts of the control system. When the ECU detects a fault signal from a sensor or sent to an actuator, it immediately illuminates the warning light on the dashboard to alert the driver that there is an engine fault. Simultaneously, the system stores the fault information in the memory in the form of predefined fault codes, helping maintenance personnel determine the type and scope of the fault. Generally, vehicles equipped with microprocessor control units have a fault self-diagnosis system, which can be used to automatically check and monitor the working status of various parts of the vehicle's transmission system and control system. When a fault occurs in the vehicle, the fault indicator light on the dashboard will flash to warn the owner that there may be a problem. By pressing a button, the fault code will be displayed on the dashboard.
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