29
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.
Figure 4-11 Sample of PIDs List
Click the magnifying glass on the top right, you can search for
related PIDs based on keywords
