28
Fig 4-7
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 system, like for engine diagnosis,
there are parameters like 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.
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