Glossary Of Terms - Triumph T595 DAYTONA Service Manual

9 FUEL SYSTEM/ENGINE MANAGEMENT

GLOSSARY OF TERMS

The following terms and abbreviations will be found in
this section. Below is given a brief explanation of what
some of the more common terms and abbreviations
mean.
Air temperature
The intake air temperature in the air box.
Air temperature sensor
Measurement in volts at the Electronic Control Module
(ECM) of the air temperature in the air box as signalled by
the air temperature sensor. Data is read out on the
diagnostic tool in degrees Celsius
ATDC
After Top Dead Centre.
Barometric pressure
Pressure of the air in the air box.
Battery voltage
The voltage at the input to the Electronic Control Module
(ECM).
BTDC
Before Top Dead Centre.
Calculated load
The actual volume of air per stroke flowing into the
engine, expressed as a percentage of the maximum
volume that can enter. Provides an indication of the
percent engine capacity that is being used (100% = full
throttle).
Closed throttle position
Throttle position at idle (i.e. against end stop), measured
as a voltage and expressed as percentage.
0% = 0 volts
100% = 5 volts
Coolant temperature
The coolant temperature in the thermostat housing.
Coolant temperature sensor
Measurement in volts at the Electronic Control Module
(ECM) of the coolant temperature in the thermostat
housing as signalled by the coolant temperature sensor.
Cooling fan status
The 'on' or 'off' condition of the cooling fan.
Corrected Throttle Position
The electronic value of the throttle position corrected
according to the closed value of the throttle
potentiometer. The reading for corrected throttle
position will be different to the actual throttle position.
DTC
Diagnostic Trouble Code.
ECM
Electronic Control Module.
Engine speed
The crankshaft revolutions per minute of the engine.
Freeze frame
A data set captured at the time a Diagnostic Trouble
Code (DTC) is set.
IACV
Idle Air Control valve.
Idle air control valve stepper position
The position of the idle air control valve stepper motor;
0 = fully closed.
180 = fully open
Idle fuel trim
The percentage above or below the nominal fuel
requirement for the volume of air entering at idle.
Idle fuelling
Adjustment of fuel at idle to suit the actual air inducted.
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