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44
Erase Codes
This option is used to clear all emissions-related diagnostics data including DTCs,
freeze frame data, and specific manufacturer-enhanced data from the vehicle ECU.
This option resets the I/M Readiness Monitor Status for all vehicle monitors to “Not
Ready” or “Not Complete”.
A Confirmation screen will appear when the Clear Codes option is selected to
prevent accidental loss of data. Select Yes on the confirmation screen to continue,
or select No to exit.
4.7.2.2 I/M Readiness
This function is used to check the readiness of the monitoring system. It is an excellent
function to use prior to having a vehicle inspected for state emissions compliance.
Select I/M readiness to display a sub menu with two choices:
Since DTCs Cleared — displays the status of monitors since the last time the
DTCs are erased.
This Driving Cycle — displays the status of monitors since the beginning of the
current drive cycle.
4.7.2.3 Live Data
This function displays the real time PID data from ECU. Displayed data includes analog
inputs and outputs, digital inputs and outputs, and system status information broadcast
on the vehicle data stream.
Live data can be displayed in various modes. See Live Data on page 32 for detailed
information.
4.7.2.4 On-Board Monitor
Use this option to view the results of on-board monitor tests. The tests are useful after
servicing or after erasing a vehicle’s control module memory.
4.7.2.5 Component Test
This function enables dual-directional control of the ECU so that the diagnostic tool is
able to transmit control commands to operate the vehicle systems. This function is
useful in determining how well the ECU responds to a command.
4.7.2.6 Vehicle Information
The option displays the vehicle identification number (VIN), the calibration identification,
and the calibration verification number (CVN), and other information of the test vehicle.
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