Xtool N9EV User Manual page 17

Context when fault appeared: record the live data when fault appeared to help the user to know the vehicle status. *Some
vehicles don't support this function; users will get a prompt when they click the menu.
Current context: Displays the current live data stream associated with the DTC
Additional data: record other data related to the fault
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ACTUATION TEST (BI-DIRECTIONAL CONTROL)
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.
This function allows the device to send information to and receive information from, vehicle control modules. For example,
in the case of OBD II generic information Mode 1 (which relates to data parameters), the scan tool user initiates a request
for information from the powertrain control module (PCM), and the PCM responds by sending the information back to the
scan tool for display. Most enhanced scan tools also can actuate relays, injectors and coils, perform system tests, etc. Users
could check the individual part to see what is working properly by actuation test.
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