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Home >> Chevrolet >> 1987 >> Chevette L4-98 1.6L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Throttle Position Sensor >> Description and Operation
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Throttle Position Sensor: Description and Operation


Sensor--mounted on the carburetor body and actuated by the accelerator pump lever or a cam on the throttle shaft--sends a varying DC voltage signal to the ECM representing throttle position.
- When the throttle plates are closed sensor output is less than 1.0 Volts.
- As plates are opened sensor voltage rises to a maximum of 5 volts.