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, sensitivity
reduction, can be judged in live data.
In the process of diagnosis, if the device shows “System is
OK” or “No Trouble Code”, it means there is no related
trouble code stored in ECU or some troubles are not under the
control of ECU, most of these troubles are mechanical system
troubles or executive circuit troubles, it is also possible that
signal of the sensor may bias within limits, which can be judged
in Live Data.
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