How to Test the Throttle Position Sensor of an Engine?

1 Answers
DiAdrian
07/29/25 4:03pm
Engine throttle position sensor testing methods are as follows: 1. Check the power supply voltage and ground: Turn the ignition switch to the "OFF" position, unplug the sensor connector, then turn the ignition switch to the "ON" position. Use a high-impedance digital multimeter in voltage mode to measure the voltage between terminal 2 on the sensor harness side and ground. This voltage should be +5V. 2. Check the sensor's resistance and continuity: Turn the ignition switch to the "OFF" position, unplug the TPS connector, and measure with a multimeter. 3. Check the sensor's output voltage: Plug in the sensor connector, turn the ignition switch to the "ON" position, and use a high-impedance digital multimeter in voltage mode.
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