Acclaim L4-153 2.5L SOHC Flex Fuel (1994)
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Throttle Position Sensor: Description and Operation
LOCATION
Sensor mounted on throttle shaft.
PURPOSE
PCM uses sensor input with other inputs to determine current operating conditions.
PCM adjusts air/fuel mixture (injector pulse width) and ignition timing.
OPERATION
Powertrain Control Module (PCM) supplies 5 volt sensor reference voltage.
Sensor is a variable resistor (potentiometer), whose resistance is dependent on the angle of the throttle blade (or throttle opening).
Output voltage ranges from approximately 1 Volt, (at idle position), to approximately 5 Volts, (at Wide Open Throttle).