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Pending Codes
These are codes whose storing conditions have been met during the last drive cycle,
but need to be met on two or more consecutive drive cycles before the DTC stored.
The purpose of displaying pending codes is to assist the service technician after a
vehicle repair when diagnostic information is cleared, by reporting test results after
a single driving cycle.
b) If a test fails during the driving cycle, the DTC associated is reported. If the
pending fault does not occur again within 40 to 80 warm-up cycles, the fault is
automatically cleared from memory.
c) Test results reported do not necessarily indicate a faulty component or system.
If test results indicate another failure after additional driving, a DTC is stored to
indicate a faulty component or system.
Freeze Frame
In most cases the stored frame is the last DTC reported. Certain DTCs, those that
have a greater impact on vehicle emission, have a higher priority. In these cases,
DTC of the highest priority 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 stored.
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 ECM.
This option 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 state 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
are erased.
This Driving Cycle — displays the status of monitors since the beginning of the
current drive cycle.
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