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car before it can be cleared with a diagnostic tool. Non-permanent fault
codes can be cleared directly with the diagnostic tool.
Figure 4-10 Sample of Clear DTC
The trouble codes can’t be erased without eliminating all the troubles, which will cause
the diagnostic tool to always read the trouble code because the code will always be saved
in ECU.
◼ Read Live Data
That is to read the parameters of the running engine, such as oil pressure,
temperature, engine speed, fuel oil temperature, coolant temperature,
intake air temperature, etc. Based on these parameters, we can judge
directly where the problem lies, which helps to narrow the scope of
maintenance. For some vehicles, during their actual operation, the
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