Launch Creader V+ User Manual page 14

LAUNCH Creader V+ User's Manual
parameters to help in identifying the problem. This set of values is referred to as
Freeze Frame Data and may include important engine parameters such as
engine RPM, vehicle speed, air flow, engine load, fuel pressure, fuel trim value,
engine coolant temperature, ignition timing advance, or closed loop status.
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.
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