Xtool A30 Pro Manual page 36

QUICK GUIDE
Reset Control Unit (Bi-directional Control)
This function allows user to figure out whether a
specific subsystem or component in the car works well
or not, and to make the tester outputs function.
(This picture is only for reference)
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
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