Throttle Position Sensors

The throttle body for the ETC system is similar to a conventional throttle body with a couple of exceptions. One exception is the use of a motor to control the throttle position instead of a mechanical cable. The other exception is the newly designed throttle position sensor. The TP sensor mounts on the side of the throttle body opposite the throttle actuator motor. The TP sensor consists of one shared 5 volt reference circuit, a shared ground circuit, and 2 signal circuits. The TP sensor must be replaced with the throttle body assembly. The TP sensor 1 signal voltage increases as the throttle opens, from approximately 1.0 volts at 0 percent throttle to more than 3.4 volts at 100 percent throttle. TP sensor 2 signal voltage decreases as the throttle is opened, from more than 3.9 volts at 0 percent throttle to less than 1.5 volts at 100 percent throttle.