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G L O S S A R Y
R o c k e r A r m C a r r i e r
A housing that the rocker arms and their fulcrums are
mounted to.
T h e r m i s t o r
Sensor used to determine temperature. A thermistor changes
it's resistance value in relation to temperature change.
Increasing temperature results in decreasing resistance,
decreasing temperature results in increasing resistance. The
thermistor in conjunction with a current limiting resistor in the
PCM forms a voltage divider that provides a voltage signal
indicating temperature. Since the top half of the voltage
divider is the current limiting resistor and is internal to the
PCM, a thermistor sensor only has two connections, signal
return and ground.
Va r i a b l e C a pa c i ta n c e S e n s o r
A sensor that is used to determine pressure. A variable
capacitance sensor changes it capacitance value in relation
pressure change. Increasing pressure results in a lower
capacitance, thus increasing return voltage. Decreasing
pressure results in a higher capacitance and a lower voltage.
Variable capacitance sensors are 3 wire sensors.
V B AT
Battery voltage.
V G T Va r i a b l e G e o m e t r y Tu r b o c h a r g e r
Could also be called EVRT. A turbocharger that has a turbine
housing that can change sizes through electronically con-
trolled hydraulics.
V G T C V Va r i a b l e G e o m e t r y Tu r b o c h a r g e r
C o n t r o l Va l v e
Could also be called EVRTCV. Controls oil flow in and out of
the VGT actuator in order to change the effective size of its
turbine housing.
V P W R
Battery voltage.
V S S Ve h i c l e Sp e e d S e n s o r
Normally a magnetic pickup style sensor that is mounted on
the tailshaft of the transmission to indicate ground speed.
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