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QUICK GUIDE
27
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
also can be included in the list of bidirectional controls.
This function allow device sends information to, and
receives information from, vehicle control modules. For
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