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43
DTC & FFD
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.
a) If a test failed during the drive cycle, the DTC associated with that
test is reported. If the pending fault does not occur again within
40 to 80 warm-up cycles, the fault is automatically cleared from
Figure 4- 16 Sample DTC & FFD Screen
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