User's Manual

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Fig 4-9 Sample of Multi-line Chart
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.
Actuation Test: Actuation test, also known as bidirectional control,
is a generic term used to describe sending and receiving
information between one device and another. This function is used
mainly to judge whether these actuating components of the engine
are working properly.
The vehicle engineers responsible for designing computer control
systems programmed them so a scan tool could request
information or command a module to perform specific tests and
functions. Some manufacturers refer to bidirectional controls as
functional tests, actuator tests, inspection tests, system tests, or
the like. Reinitialization and reprogramming also can be included in
the list of bidirectional controls.