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A c t u a t o r
A device which delivers motion in response to an electrical
signal.
A n a l o g
A continuously variable voltage.
A P S A c c e l e r a t o r P o s i t i o n S e n s o r
A potentiometer style sensor that indicates the operator's
pedal position.
AWA F e a t u r e
A feature built into the high pressure oil rails used to dampen
noises that can be caused by the hydraulic system.
B A R O B a r o m e t r i c P r e s s u r e S e n s o r
An analog device which indicates atmospheric pressure
which allows the PCM to compensate for altitude. A BARO
sensor has three connections, signal return(gnd), BARO
signal, and Vref.
C A C C h a r g e A i r C o o l i n g
A process of cooling the air coming out of the turbocharger
before it enters the engine.
C a n i s t e r St y l e O i l F i l t e r
An oil filter that requires only the element be replaced and not
the housing.
C A N
A communication protocol for data transfer between the con-
trol modules.
C K P C r a n k s h a ft P o s i t i o n S e n s o r
A magnetic pickup sensor that creates a sine wave voltage
when the timing wheel on the crankshaft breaks its magnetic
field. The CKP determines crankshaft position and speed.
C l o s e d C r a n k c a s e B r e a t h e r
A ventilation system that recirculates crankcase vapors into
the intake air system.
C M P C a m s h a ft P o s i t i o n S e n s o r
A magnetic pickup sensor that creates a sine wave voltage
when a peg on the camshaft breaks its magnetic field. The
CMP determines which cycle the piston is in (compression or
exhaust).
C o m b i n a t i o n F u e l P u m p / P o w e r St e e r i n g
P u m p
A fuel pump and power steering pump that are made into one
unit and driven off of the rear gear train.
G L O S S A R Y
D i g i ta l F u e l I n j e c t i o n
A fuel injection system that uses both an open and close
signal to control fuel injectors.
D u a l Ti m i n g S y s t e m
A timing System that uses both a CKP and CMP sensors to
determine engine speed and rotational position.
D V O M D i g i ta l Vo l t O h m M e t e r
A meter that uses a digital display to indicate a measured
value. Preferred for use on microprocessor systems because
a DVOM has a very high internal impedance and will not load
down the circuit being measured.
P C M P o w e r t r a i n C o n t r o l M o d u l e
The housing which contains the micro computer, Vref
regulator, input conditioners and output drivers.
E C T E n g i n e C o o l a n t Te m p e r a t u r e S e n s o r
A thermistor style sensor used to indicate engine coolant
temperature.
E G R C o o l e r
A device used to cool exhaust gases before they are returned
to the intake air system.
E G R E x h a u s t G a s R e c i r c u l a t i o n Va l v e
A valve used to control the flow of exhaust gases into the
intake manifold.
E G R P E x h a u s t G a s R e c i r c u l a t i o n Va l v e
P o s i t i o n S e n s o r
A potentiometer style sensor that indicates the amount of
movement of the EGR valve.
E O P E n g i n e O i l P r e s s u r e S e n s o r
A variable capacitance style sensor used to indicate engine
oil pressure.
E O T E n g i n e O i l Te m p e r a t u r e
A thermistor type sensor which indicates engine temperature.
E V R T C o n t r o l Va l v e
See VGTCV Variable Geometry Turbocharger Control Valve.
E V R T
See VGT Variable Geometry Turbocharger.
F I C M F u e l I n j e c t i o n C o n t r o l M o d u l e
An electronic unit which has the primary function of an
electronic distributor for the injectors. It also is the power
supply for the injectors.
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