Throttle Position Sensor

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Accelerator pedal module provides two variable voltage signals to the ECM that represents accelerator pedal position and rate of movement. Dual Hall Sensors are integral in the accelerator pedal module. The ECM compares the 2 values for plausibility. The module contains internal springs to return the accelerator pedal to the rest position.

The ECM provides voltage (5 volts) and ground for the Hall sensors. As the accelerator pedal is moved from rest to full throttle, the sensors produce a variable voltage signal:

Hall sensor 1 (request) = 0.5 to 4.5 volts.
Hall sensor 2 (plausibility) = 0.5 to 2.0 volts.

If the signals are not plausible, the ECM will use the lower of the two signals as the requested input. The throttle response will be slower and the maximum throttle response will be reduced. Throttle position sensor is not adjustable.