Launch Creader Elite 2.0 BBA Manual page 8

LAUNCH
Monitors - Monitors are "diagnostic routines" programmed into the PCM. The
PCM utilizes these programs to run diagnostic tests, and to monitor operation
of the vehicle's emissions-related components or systems to ensure they are
operating correctly and within the vehicle's manufacturer specifications.
Enabling Criteria -- Also termed Enabling Conditions. They are the vehicle-
specific events or conditions that must occur within the engine before the various
monitors will set, or run. Some monitors require the vehicle to follow a prescribed
"drive cycle" routine as part of the enabling criteria. Drive cycles vary among
vehicles and for each monitor in any particular vehicle. Please refer to the
vehicle's factory service manual for specific enabling procedures.
Trip - A Trip for a particular Monitor requires that the vehicle is being driven in
such a way that all the required "Enabling Criteria" for the Monitor to run and
complete its diagnostic testing are met. The "Trip Drive Cycle" for a particular
Monitor begins when the ignition key is turned "On." It is successfully completed
when all the "Enabling Criteria" for the Monitor to run and complete its diagnostic
testing are met by the time the ignition key is turned "Off." Since each of the
fifteen monitors is designed to run diagnostics and testing on a different part
of the engine or emissions system, the "Trip Drive Cycle" needed for each
individual Monitor to run and complete varies.
Drive Cycle - A specific mode of vehicle operation that provides conditions
required to set all the readiness monitors applicable to the vehicle to the "ready"
condition. The purpose of completing an OBD II drive cycle is to force the vehicle
to run its onboard diagnostics. Some form of a drive cycle needs to be performed
after DTCs have been erased from the PCM's memory or after the battery has
been disconnected. Running through a vehicle's complete drive cycle will "set"
the readiness monitors so that future faults can be detected. Drive cycles vary
depending on the vehicle and the monitor that needs to be reset. For vehicle
specific drive cycle, consult the service manual.
*Note: Do not confuse a "Trip" Drive Cycle with an OBD II Drive Cycle. A "Trip" Drive
Cycle provides the "Enabling Criteria" for one specific Monitor to run and complete
its diagnostic testing. An OBD II Drive Cycle must meet the "Enabling Criteria" for all
Monitors on a particular vehicle to run and complete their diagnostic testing.
Warm-up Cycle - Vehicle operation after an engine off period where engine
temperature rises at least 40°F (22°C) from its temperature before starting, and
reaches at least 160°F (70°C). The PCM uses warm-up cycles as a counter to
automatically erase a specific code and related data from its memory. When no
faults related to the original problem are detected within a specified number of
warm-up cycles, the code is erased automatically.
Fuel Trim (FT) - Feedback adjustments to the base fuel schedule. Short-term
fuel trim refers to dynamic or instantaneous adjustments. Long-term fuel trim
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