CLEAR TROUBLE CODE
It allows clearing current and historical trouble codes memory in ECU,
under the premise that all the troubles are eliminated.
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. Suggestion: users should
better not clear trouble codes, we need to record the trouble details after
reading the code, which is provided as a reference for maintenance. After
dealing with troubles, there will be no trouble code when we re-read.
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
problems such as performance characteristics offset, and sensitivity
reduction can be judged in live data.
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