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Home >> Pontiac >> 2002 >> Aztek FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 239 (Engine Controls - Theory & Operation - 2.2L) >> Computerized Engine Controls >> Input Devices >> Throttle Position Sensor
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Throttle Position Sensor

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The Throttle Position (TP) sensor is used by the Powertrain Control Module (PCM) to determine the throttle plate angle for various engine management systems. The TP sensor is a potentiometer type sensor with a 5-volt reference, a low reference and a signal return. The PCM provides the TP sensor with 5 volts on the 5-volt reference circuit and a ground on the low reference circuit. Rotation of the TP sensor rotor from the closed throttle position to the Wide Open Throttle (WOT) position provides the PCM with a signal voltage from less than one volt to more than 4 volts through the TP sensor signal circuit.

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