User's Manual

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This function allows the device to send information to and receive
information from, vehicle control modules. For example, in the
case of OBD II generic information Mode 1 (which relates to data
parameters), the scan tool user initiates a request for information
from the powertrain control module (PCM), and the PCM responds
by sending the information back to the scan tool for display. Most
enhanced scan tools also can actuate relays, injectors, and coils,
perform system tests, etc. Users could check the individual part to
see what is working properly by actuation test.
Fig 4-10 click on Continue to complete the test
Freeze Frame: 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.