Fuel Level Sensor: Testing and Inspection

This procedure tests the resistance of the level sensor itself. It does not test the level sensor circuit.

Level Sensor Diagnosis:

The level sensor is a variable resistor. Its resistance changes with the amount of fuel in the tank. The float arm attached to the sensor moves as the fuel level changes. To test the level sensor, connect an ohmmeter across the sensor signal and sensor ground terminals of the fuel pump module connector. Move the float lever over the entire range to the positions shown in the resistance chart.

Record the resistance at each end point. Replace the level sensor if the resistance is not within specifications, or an open circuit is noted during the entire range inspection.