Note. For circuit reference, see the appropriate WIRING DIAGRAMS article. For connector and terminal identification, see CONNECTOR IDENTIFICATION .
Circuit Description
Throttle Position (TP) sensor is a potentiometer, mounted on side of throttle Body. TP sensor voltage signal changes relative to throttle blade angle. This signal voltage is one of most important inputs used by PCM. TP sensor has a 5-volt reference, ground and a signal circuit.
TP sensor signal voltage should be about 0.6 volt at idle and 4 volts or more at wide open throttle. PCM compares actual throttle position from TP sensor to a predicted throttle position value. Predicted value is calculated from engine speed and other inputs. If PCM detects predicted throttle position is more than actual TP sensor value, DTC will set.
DTC will set when following conditions are present
- TP sensor voltage is more than 4.8 volts for .3 second.