How to Adjust the TPS on a 1994 3.0 V6 Toyota Pickup

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The throttle position sensor on a 1994 Toyota pickup is used to signal the amount of throttle angle. This is important information necessary for the computer to regulate the fuel mixture and ignition timing. As the driver steps on the gas pedal he is moving the throttle linkage on the throttle body which in turn rotates the inside of the throttle position sensor. The sensor voltage increases as the pedal is depressed and decreases as it is lowered.

Things You'll Need

  • Phillips screwdriver
  • Voltmeter
  • Needle
  • Remove the air cleaner lid and the air duct leading to the throttle body using the Phillips screwdriver. Pull the air duct off the throttle body. Stick the pin in the center wire of the throttle position sensor plug.

  • Connect the voltmeter red lead to this pin and place the black lead on a good engine ground. Loosen the two screws securing the sensor to the throttle body using the Phillips screwdriver.

  • Turn the ignition key on but do not start the engine. Rotate the sensor left or right until the voltmeter displays 0.50 volts. Tighten the two bolts in the sensor so it will no longer move. Pull the pin out of the wire on the sensor. Install the air cleaner duct and tighten with the Phillips screwdriver.

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