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29
DN606 Automotive Diagnostic Tool User's Manual
• If [View Graphic Items] is selected in Data stream menu and press
to enter
the graphic items selection screen.
Press
/ to select single data stream items, and press , the screen will
display the selected items of live graphic data.
5.1.5 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.
5.1.6 O2 sensor test
OBD II regulations require that applicable vehicles monitor and test operation
of the oxygen (O
2
) sensors to identify problems that can affect fuel efficiency
and vehicle emissions. These tests are performed automatically when engine
operating conditions are within predefined limits. Results of these tests are
stored in the on-board computer’s memory.
The O2 Sensor Test function lets you retrieve and view O2 sensor monitor
test results for the most recently completed tests from your vehicle’s on-board
computer.
5.1.7 On-board monitor test
The On-board Monitor Test function retrieves and displays test results for
emission-related powertrain components and systems that are not continuously
monitored. The tests available are determined by the vehicle manufacturer.
5.1.8 EVAP System Test
The EVAP test function lets you initiate a leak test for the vehicle’s EVAP system.
This tool does not perform the leak test, but signals to vehicle’s on-board
computer to initiate the test. The vehicle manufacturer determines the criteria
and method for stopping the test once it has been started. Before using the
system test function, refer to the vehicle’s service repair manual to determine the
procedures necessary to stop the test.
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