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.
Actuation Test: mainly to judge whether these actuating
components of engine are working properly.
Fig 4-9
Frozen Frame: When the signal of the sensor is abnormal, the
ECU will save the data at that moment of failure to form a frozen
frame. It is usually used to analyze the reasons that may lead to
car failures.
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General
Weight and Dimensions
