Throttle Position (TP) Sensor

TP sensor is located in a common housing with closed TP switch on the bottom of the throttle housing. TP sensor is connected to throttle shaft and is supplied 5 volts by PCM. PCM receives a varying voltage signal from TP potentiometer as throttle position changes. Voltage signal supplied by PCM is used to determine position of throttle plates and speed of throttle movement. This data is used for:

• Acceleration enrichment.
• Full throttle enrichment.

Throttle valve potentiometer is also used as a substitute for Mass Airflow (MAF) sensor signal.