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Home >> Chevrolet >> 1990 >> Forward Control 6.2 J, Automatic, 475/M40 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls (Diesel) >> Throttle Position Sensor (TPS)
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Throttle Position Sensor (TPS)

TPS, mounted on the injection pump, is a variable resistor monitoring throttle opening angle for the ECM. The sensor is connected to a 5-volt reference signal and has a high resistance value when throttle is closed. At wide open throttle, the TPS resistance value is low and output to the ECM will be near 5 volts.

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