Toyota 89452-06020 Sensor, Throttle Position

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The Throttle Position Sensor (TPS) is a component that monitors the output voltage to determine fuel delivery based on throttle valve angle. It is located on the end of the throttle shaft on the throttle body.

To check the Throttle Position Sensor (TPS), follow these steps. The TPS is located on the end of the throttle shaft on the throttle body and monitors the throttle valve angle for fuel delivery control. First, check the reference voltage from the Powertrain Control Module (PCM) to the TPS by disconnecting the TPS electrical connector and measuring the voltage between terminal number 1 and the ground with a voltmeter. The reference voltage should be around 4.5 to 5.5 volts with the ignition key turned ON. If the voltage is incorrect or absent, check the PCM. Next, check the TPS signal voltage by reconnecting the electrical connector and back-probing terminals 2 andWith the ignition key turned ON and the throttle fully closed, the voltage should be approximately 0.3 to 1.0 volts. Slowly opening the throttle should increase the voltage to the specified range depending on the engine type. If the readings are outside the specified range, replace the TPS. For TPS replacement, ensure the ignition key is in the OFF position and disconnect the electrical connector from the TPS. Remove the screws securing the TPS to the throttle body and take out the TPS. To install the new TPS, follow the reverse order of removal.