Full Product Manual

43
 Freeze Frame
Typically, the stored frame is the last DTC that occurred. Certain DTCs
that have a greater impact on vehicle emission, have a higher priority.
In these cases, the top prioritized 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 is set.
 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 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 state
emissions compliance. Select I/M Readiness to open 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.
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 34 for
detailed information.
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.