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Home >> Isuzu >> 1987 >> I-Mark Base, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Operation >> Throttle Position Sensor
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Throttle Position Sensor

The Throttle Position Sensor (TPS) assembly consists of an idle switch, used to determine idle position, and a throttle position switch used to sense pre-wide open throttle (WOT) and WOT position.

The TPS is connected to throttle shaft of carburetor and provides a voltage which is a function of throttle angle.

TPS voltage enables ECM to read throttle position so ECM can sense pre-WOT and WOT position. The purpose of using TPS for a manual transmission is to inform ECM of engine load for gear shift indicator light system.

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