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23
LAUNCH Professional 129X User Manual
EN
This option retrieves and displays live data and parameters from the vehicle’s
ECU.
5. View Freeze Frame
When an emission-related fault occurs, certain vehicle conditions are recorded
by the on-board computer. This information is referred to as freeze frame data.
Freeze Data is a snapshot of the operating conditions at the time of an emission-
related fault.
*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).
5.4 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
the necessity of starting from scratch.
Tap “History” on the Manual Diagnosis main menu screen, all diagnostic records
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