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When the signal of the sensor is abnormal, the ECU will save the data
at that moment of failure to form a freeze-frame. It is usually used to
analyze the reasons that may lead to car failures.
The living data items supported by vehicles of different brands are not
the same, so the freeze frames displayed when diagnosing vehicles of
different brands may also be different. Some vehicles may not have
the option of a freeze-frame which means that the model does not
support this function.
Take
Renault Duster ii ph
as an example, after selecting the system
to enter the lower freeze frame menu, the device will list all the fault
codes under the system.
Users can click on a fault code, such as
DF1068
to view the freeze
frame recorded by the car when the fault code occurs, including
context when the fault appeared, and current context and additional
data.
Figure 4-17 Sample of the Freeze frame for Renault Duster ii ph (Screen 1)
