monitors will set, or run.Some monitors require the vehicle to follow
a prescribed "drive cycle" routine as parit of the enabling criteria.
Drive cycles vary among vehicles and for each monitor in any
particular vehicle.
OBD II Drive Cycle
—A specific mode of vehicle operation that
provides conditions required to set all the applicable readiness
monitors in the vehicle to the "ready" cibdutuib. The purpose of
completing an OBD II drive cycle is to force the vehicle to run its on
board diagnostics .Some form of a drive cycle needs to be performed
after DTCs have been erased from the PCM's memory. Running
through a vehicle's complete drive cycle will "set" the readiness
monitors so that future faults can be detected. Drive cycles vary
deoending on the vehicle and the monitor that needs to be reset . For
vehicle specfic drive cycle,consult the vehicle's Owner's Manu
Freeze Frame Data
—When an emissions related fault occurs,OBD II
system not only sets a code but also records a snapshot of the vehicle
operating parameter to help in identifying the proble. This set of
values is referred to as Freeze Frane Data and may include:engine
parameters such as engine PRM,vehicle speed ,air flow,engine load ,
fuel pressure,fuel trim vale,engine coolants ignition timing advance,
or colosed loop status.
3. Using the Scan Tool
3.1 About NEXPEAK N X301
NEXPEAK NX301 Features the unique patented logical navigation
buttons, TFT backlit display screen and built-in speaker. The
NEXPEAK NX301 is the ultimate in ease and affordability, enabling
users to verify repairs, road test, check State, Emission Monitor Status
and solve engine systems and drive ability problems. The car diagnostic
functions of NX301 is much more reliable and completely superior to
other model, it support full OBDII 10 Modes diagnostics. Besides,
with built-in Memory chip, allows users to print out stored diagnostic
data via PC, and life-time free update makes you no more worry about
your car malfunction in the future.
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