l-18
ENGINE
<NON-TURBO>
-
Control System
The throttle position sensor (TPS) connects to the
throttle blade shaft. The TPS is a variable resistor
that provides the powertrain control module (PCM)
with an input signal (voltage). The signal represents
throttle blade position. As the position of the throttle
blade changes, the resistance of the TPS changes.
The PCM supplies approximately 5 volts to the TPS.
The TPS output voltage (input signal to the
power-
train control module) represents throttle blade
posi-
CAMSHAFT POSITION SENSOR
The PCM determines ignition and fuel injection syn-
chronization and cylinder identification from inputs
provided by the camshaft position sensor and
crank-
tion. The TPS output voltage to the PCM varies
from approximately 0.40 volt at minimum throttle
opening (idle) to a maximum of 3.80 volts at wide
open throttle.
Along with inputs from other sensors, the PCM uses
the TPS input to determine current engine operating
conditions. The PCM also adjusts fuel injector pulse
width and ignition timing based on these inputs.
N71AKOSAA
shaft position sensor. From the two inputs, the PCM
determines crankshaft position and cylinder cycle.
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Camshaft
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.
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