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8.5.2 Function Descriptions
This section describes the various functions of each diagnostic option.
8.5.2.1 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 if the Freeze Frame data
is available for viewing. Tap Clear DTC to erase codes.
Figure 8-16 DTC & FFD Screen
⚫ Stored Codes
Stored codes are the current emission-elated DTCs from the ECM of the vehicle.
OBDII/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 memory.
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