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49
Function Descriptions
This section describes the various functions of each diagnostics option:
DTC & FFD
When this function is selected, the screen displays a list of Stored Codes and Pending
Codes. When the Freeze Frame data of certain DTCs are available for viewing, a
snowflake button will display on the right side of the DTC item. The Erase Codes function
can be applied by tapping the function button at the lower bottom of the screen.
Figure 4-22 DTC & FFD Screen
Stored Codes
Stored codes are the current emission related DTCs from the ECU 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 Malfunction Indicator Light (MIL) and the codes erase
procedure. Manufacturers rank codes differently, so expect to see differences
between vehicles.
Pending Codes
These are codes for which setting conditions were met during the last drive cycle,
but need to be met on two or more consecutive drive cycles before the DTC actually
sets. 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 single driving cycle.
a) If a test failed during the driving 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.
b) Test results reported by this service do not necessarily indicate a faulty
component or system. If test results indicate another failure after additional
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