Electronic Throttle Body (ETB) Position Sensor

The ETB position sensor has 2 signal circuits in the sensor for redundancy. The redundant ETB position signals are required for increased monitoring. The first ETB position sensor signal (TP1) has a negative slope (increasing angle, decreasing voltage) and the second signal (TP2) has a positive slope (increasing angle, increasing voltage). During normal operation the negative slope ETB position sensor signal (TP1) is used by the control strategy as the indication of throttle position. The 2 ETB position sensor signals make sure the PCM receives a correct input even if 1 signal has a concern. There is 1 reference voltage circuit and 1 signal return circuit for the sensor. For additional information, refer to TORQUE BASED ELECTRONIC THROTTLE CONTROL (ETC) .