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What are the functions of an automotive fault diagnostic tool?

1 Answers

VanDerek

07/29/25 5:26am

Automotive fault diagnostic tools enable automotive repair technicians to quickly read faults within a vehicle's electronic control system, displaying fault information via an LCD screen to promptly identify the location and cause of the issue. An automotive fault diagnostic tool is a portable intelligent self-inspection terminal for vehicle faults (also known as an automotive decoder), used to detect car malfunctions. The principle of an automotive fault diagnostic tool involves diagnosing whether the sensors, actuators, and the ECU (Engine Control Unit) of the electronic control system are functioning normally. By determining whether the input and output voltages of the ECU vary within specified ranges, it can assess whether the electronic control system is operating correctly. When a circuit within the electronic control system generates a signal that exceeds the specified parameters, the fault information related to that circuit and its associated sensors is stored as a fault code in the ECU's internal memory. Maintenance personnel can use the diagnostic tool to read and display these fault codes.

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