No. The throttle position sensor is a potentiometer, connected to the throttle shaft on the throttle body. The TPS electrical circuit consists of a 5V supply line which is grey and a ground path line which is black, both provided by the ECM. A third wire is used as a signal line to the ECM. By monitoring the voltage on the signal line, the ECM calculates throttle position. As the throttle valve angle is changed (accelerator pedal moved), the signal voltage of the TPS also changes. At closed throttle position, the signal of the TPS is low -1.25 volts. As the throttle valve opens, the signal voltage increases so that, at wide open throttle it should be approx. 5 volts.
Sep 7, 2009 at 8:05 PM
