User guide

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is that the catalytic converter heats up quicker.
Secondary Air System Monitor
This non-continuous monitor checks the air pump and all its com-
ponents. This is a "Two-Trip" monitor. See also Secondary Air Sys-
tem.
STFT or Short Term Fuel Trim
Like the LTFT, STFT adapts the fuel inputs to keep the engine per-
forming to the current style of driving.
TPS or Throttle Body
Monitors the throttle value position (which determines how much
air goes into the engine) so that the engine computer can respond
quickly to changes, increasing or decreasing the fuel rate as neces-
sary.
Trip
A specific series of steps required in order to have a single monitor
run its test and complete. If your vehicle manufacturer details the
specific requirements to initiate and complete a single monitor test,
then a repair technician can prevent a lengthy drive cycle. Some-
times a monitor is referred to as a "One-Trip" or “Two-Trip”. A
"One-Trip" monitor means that if a fault is detected the engine
computer will illuminate the MIL and a DTC will be placed as a
stored DTC. A "Two-Trip" monitor means that if a fault is detected
on the first trip, the engine computer will temporarily save this fault
in its memory as a pending DTC (the MIL will be off). If the fault is
detected again on a second consecutive trip, the engine computer
will illuminate the MIL and a DTC will be placed as a stored DTC.
The Fuel System Monitor and Misfire Monitor are the only "One-
Trip" monitors. See also Drive Cycle.
Two-Trip Monitor
A non-continuous monitor that requires atleast two faults in two
seperate trips to be detected before the engine computer illuminates
the MIL and places a DTC in the stored DTC area of the engine
computer’s memory. See also One-Trip Monitor or Trip.
WOT or Wide-Open Throttle