STS AWD V8-4.6L VIN A (2006)
Throttle Position Sensor: Description and Operation
THROTTLE POSITION SENSORS
The throttle position (TP) sensors 1 and 2 are located within the throttle body assembly. The TP sensors share a common 5-Volt reference circuit and a
common low reference circuit. The 5-Volt reference circuit is also shared with accelerator pedal position (APP) sensor 2. The 5-Volt reference voltage is
supplied on 2 separate engine control module (ECM) terminals, but the terminals are connected internally to the same voltage supply. Each TP sensor
has an individual signal circuit, which provides the ECM with a signal voltage proportional to throttle the plate movement. When the throttle plate is in
the closed position, the TP sensor 1 signal voltage is near the low reference and increases as the throttle plate is opened. TP sensor 2 signal voltage at
closed throttle is near the 5-Volt reference and decreases as the throttle plate is opened.
