Launch CReader 3001 User Manual

LAUNCH 3001
User’s Manual
8
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.
OBD 2 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 2 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 2 Drive Cycle. A “Trip” Drive
Cycle provides the “Enabling Criteria” for one specific Monitor to run and complete its
diagnostic testing. An OBD 2 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 refers to
much more gradual adjustments to the fuel calibration schedule than short-term
trim adjustments. These long-term adjustments compensate for vehicle
differences and gradual changes that occur over time.
2.6 OBD II Monitors
An important part of a vehicle’s OBD 2 system is the Readiness Monitors, which
are indicators used to find out if all of the emissions components have been
evaluated by the OBD 2 system. They are running periodic tests on specific
systems and components to ensure that they are performing within allowable

Launch CReader 3001 Specifications

General

Brand	Launch
Model	CReader 3001
Category	Scanner
Language	English