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Function Descriptions
This section describes the various functions of each diagnostic option:
DTC & FFD
Figure 4-16
Sample DTC & FFD Screen
When this function is selected, the screen displays a list of Stored and
Pending Codes. A snowflake button will display on the right side of the
DTC item when the Freeze Frame data is available for viewing. Tap
Clear
DTC
to erase codes.
Stored Codes
Stored codes are the current emission-related DTCs from the ECM of
the vehicle. OBD II/EOBD Codes have a priority according to their
emission severity, with higher priority codes overwriting lower priority
codes. The priority of the code determines the illumination of the MIL
and the codes erase procedure. Manufacturers rank codes differently,
so expect to see differences between makes.
Pending Codes
These are codes that were generated during the last drive cycle, but
before the DTC actually sets, two or more consecutive drive cycles are
needed. The intended use of this service is to assist the service
technician after a vehicle repair and after clearing diagnostic information,
by reporting test results after a driving cycle.
