63
Erase Codes
This option is used to clear all emission-related diagnostic 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 status.
A confirmation screen will display when the clear codes option is selected to prevent
accidental loss of data. Tap
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 local emissions compliance.
Selecting I/M Readiness opens a submenu with two choices:
Since DTCs Cleared
—
displays the status of monitors since the last time the DTCs
were erased.
This Drive Cycle
—
displays the status of monitors since the beginning of the current
drive cycle.
Live Data
This function enables the display of real-time PID data from the ECU. Displayed data
includes analog and digital input and output, and system status information broadcast in
the vehicle data stream.
Live data can be displayed in various modes. See
on page 53 for detailed
information.
O
2
Sensor Monitor
This function allows the retrieval and review of recent O
2
sensor monitor test results stored
on 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 below.
On-Board Monitor
This function allows you to view the results of On-Board Monitor tests. The tests are useful
after the service when a vehicle's control module memory is already erased.
Component Test
This function enables dual-directional control of the ECU so that the diagnostics tool can
transmit control commands to operate the vehicle systems. This function is useful in
determining how well the ECU responds to a command.