Throttle Position Sensor (TPS)

TPS is regulated by movement of throttle shaft. It is mounted on throttle body and senses angle of throttle blade opening.

A voltage signal of up to 5 volts at wide open throttle is produced by TPS. Voltage varies with throttle angle changes. This signal is transmitted to ECU where it is used to adjust air/fuel ratio during acceleration, deceleration, idle, and wide open throttle conditions.

A dual TPS is used on models with automatic transmissions. This dual TPS not only provides ECU with input voltages but also supplies automatic transmission control unit with input signals relative to throttle position.