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43
Active Test
The Active Test function is used to access vehicle-specific subsystem and component
tests. Available test vary by vehicle manufacturer, year, and model, and only the available
tests display in the menu.
During an active test, the tester outputs commands to the ECU in order to drive the
actuators. This test determines the integrity of the system or parts by reading the engine
ECU data or by monitoring the operation of the actuators, such as toggling a solenoid,
relay or switch, between two operating states.
Selecting Active Test opens a menu of test options that varies by vehicle make and
model. Selecting a menu option activates the test. Follow all screen instructions while
performing tests. How and what information is presented on the screen varies according
to the type of test being performed. Some toggle and variable control tests display Active
Test Controls at the top of the screen with data stream information below, or vice versa.
Figure 4-18 Active Test Screen
The function buttons at the lower-right corner of the Active Test screen manipulate the
test signals. The operational instructions are displayed on the main section of the test
screen. Simply follow the on-screen instructions and make appropriate selections to
complete the tests. Each time when an operation is successfully executed, message
such as “Command Finished,” “Activation Successful,” or something similar displays.
Tap the ESC function button to exit the test when finished.
Special Functions
These functions perform various component adaptations, allowing you to recalibrate or
configure certain components after making repairs or replacement.
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