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Home >> GMC >> 1993 >> Value Van 4.3 Z, Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls (Diesel) >> Input Devices >> Throttle Position (TP) Sensor
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Throttle Position (TP) Sensor

TP sensor, mounted on injection pump, is a variable resistor that monitors throttle opening angle for ECM. Sensor, connected to a 5-volt reference signal, has a high resistance value when throttle is closed. At wide open throttle, sensor resistance value is low and output to ECM will be about 5 volts.

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