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37
LAUNCH Professional 919E User Manual
Note: If DTCs were erased, Freeze Data may not be stored in vehicle memory
depending on vehicle.
6. O2 sensor test
The results of O2 sensor test are not live values but instead the results of the
ECU’s last O2 sensor test. For live O2 sensor readings, refer to any of the live
sensor screens such as Graph Screen.
Not all test values are applicable to all vehicles. Therefore, the list generated
will vary depending on vehicle. In addition, not all vehicles support the Oxygen
Sensors screen.
7. On-board monitor test
This function can be utilized to read the results of on-board diagnostic
monitoring tests for specic components/systems.
8. EVAP System Test
The EVAP test function lets you initiate a leak test for the vehicle’s EVAP
system. The tool does not perform the leak test, but signals to vehicle’s on-
board computer to initiate the test. Before using the system test function, refer
to the vehicle’s service repair manual to determine the procedures necessary
to stop the test.
9. Vehicle Info
This option displays the vehicle information, such as VIN (Vehicle Identication
Number), CID (Calibration ID) and CVN (Calibration Verication Number).
4.4 History
Generally once a vehicle diagnosis is performed, the tool will record the every
details of diagnostic session. The History function provides direct access to
the previously tested vehicles and users can resume from the last operation,
without starting from scratch.
Tap History on the Diagnose main menu screen, all diagnostic records will be
listed on the screen in date sequence.
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