LAUNCH 629 User's Manual
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the various emissions-related systems on the vehicle are operating properly
and are ready for Inspection and Maintenance testing.
The purpose of the I/M Readiness Monitor Status is to indicate which of the
vehicle’s Monitors have run and completed their diagnosis and testing, and
which ones have not yet run and completed testing and diagnosis of their
designated sections of the vehicle’s emissions system.
The I/M Readiness Monitor Status function also can be used (after repair of
a fault has been performed) to confirm that the repair has been performed
correctly, and/or to check for Monitor Run Status.
Select [I/M Readiness] from the Diagnostic Menu and press [OK], the screen
will display the I/M readiness result.
N/A means not available on this vehicle, INC means incomplete or not ready,
OK means Completed or Monitor OK.
Press [ ] to return to Diagnostic Menu.
4. Data Stream
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. O
2
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 efciency
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 O
2
Sensor Test function lets you retrieve and view O
2
sensor monitor test
results for the most recently completed tests from your vehicle’s on-board
computer.
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