To test the TPS sensor you will need a volt meter. Full Throttle is triggered 2.71 volts above Closed Throttleīefore testing the TPS or any other EFI component perform a self-test, trouble codes received during test can be used as a diagnostic tool along with other indicators.Part Throttle is triggered 0.04 volts above Closed Throttle.Closed Throttle can be anywhere between 0.6-1.0 volts.This alleviates the necessity to set the throttle position sensor at an absolute position and compensates for system changes and differences between vehicles. There is a TPS ratchet algorithm which continuously seeks the minimum throttle angle corresponding to a CLOSED THROTTLE position. EEC listens to your every command from the TPS. The TPS is the closest thing you have to a phone call into EEC. The TPS sensor has a great deal of influence on the fuel ratios and timing curves, because the TPS is a user interface sensor. As the throttle is opened the TPS directs more voltage to the EEC and less down the voltage reference circuit.Īll of the following items will affect the TPS: Voltage is fed to the TPS by the signal return circuit. The TPS is pretty easy to understand how it work’s, it is a potentiometer just like your dimmer switch in the dash. The throttle position sensor is mounted on the end of the throttle body and tells the computer how far open or closed the throttle is.
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