Fuel Level Sensor Check: Thermistor

CAUTION: After finishing this test, wipe the unit dry and install it in the fuel tank.

Connect the fuel level sensor (thermistor) to the battery via a test light (12 V - 3.4 W). Immerse the thermistor in water.
Condition is good if the light goes off when the thermistor is immersed in water and comes on when it is taken out of water.
If all check result is correct, the fuel level sensor is OK. If either check result is not correct, replace the fuel level sensor.

Fig 1: Connecting Fuel Level Sensor (Thermistor) To Battery Via Test Light
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.