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47
Clear DTC
This option is used to clear all emission related diagnostic data such as, DTCs,
freeze frame data and manufacturer specific enhanced data from the vehicle’s ECM.
A confirmation screen displays when the clear codes option is selected to prevent
accidental loss of data. Select Yes on the confirmation screen to continue or No to
exit.
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 compliance to a state emissions
program. Selecting I/M Readiness opens a submenu 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.
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 for detailed information.
O
2
Sensor Monitor
This option allows retrieval and viewing of O
2
sensor monitor test results for the most
recently performed tests from the vehicle’s on-board computer.
The O
2
Sensor Monitor test function is not supported by vehicles that communicate using
a controller area network (CAN). For O
2
Sensor Monitor tests results of CAN-equipped
vehicles, refer to
On-Board Monitor.
On-Board Monitor
This option allows you to view the results of On-Board Monitor tests. The tests are useful
after servicing or after erasing a vehicle’s control module memory.
Component Test
This service enables bi-directional control of the ECM so that the diagnostic tool is able
to transmit control commands to operate the vehicle systems. This function is useful in
determining whether the ECM responds to a command well.
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