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the time the DTC is set.
Erase Codes
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, and resets the I/M Readiness Monitor Status for all vehicle monitors to Not
Ready or Not Complete status.
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
on page 36 for detailed
information.
O2 Sensor Monitor
This option allows retrieval and viewing of O2 sensor monitor test results for the most
recently performed tests from the vehicle
’s on-board computer.
The O2 Sensor Monitor test function is not supported by vehicles which communicate
using a controller area network (CAN). For O2 Sensor Monitor tests results of
CAN-equipped vehicles, refer to
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.
