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OBD Direct Operations OBD Diagnose
($02) Display Freeze Frame Data
This item is used to display freeze fame data for any stored emission related diagnostic trouble
codes (DTC). In most cases the stored frame is the last DTC that occurred. Certain DTCs, those
that have a greater impact on vehicle emission, have a higher priority. In these cases, the highest
priority DTC is the one for which the freeze frame records are retained.
Freeze frame data includes a “snapshot” of critical parameter values at the time the DTC set.
($03) Display Trouble Codes
This is used to display any stored emission related DTCs reported by the various ECMs.
($04) Clear Emissions Related Data
This item is used to clear all emission related diagnostic data such as, DTCs, freeze frame data,
and test results from the memory of the selected ECM.
($05, 06, 07) Display Test param./Results
This selection opens a submenu of test parameters and test results form various sensors, such as
the oxygen sensor (O2S), monitor test results, and a record of DTCs detected during the last drive
cycle. The menu includes:
• Oxygen Sensor Monitoring ($05)
• Specific Monitored Systems ($06)
• DTCs Detected During Last Drive ($07)
($08) Request Control of On-board System
This service enables bidirectional control of the ECM, that is the Scanner transmits control
commands to operate the vehicle system. This function is useful in determining how well the ECM
responds to a command.
Available options vary by make, model, and year of the test vehicle. Select a test and follow the
on-screen instructions.
($09) Read Vehicle Identification
This selection displays the vehicle identification number (VIN), the calibration identification, and
the calibration verification number (CVN) of the test vehicle.
($09) In-use Performance Tracking
This selection displays the “In-use Performance Tracking” of monitored data. It is basically a
record of the number of times each of the monitor tests have been completed.
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