Fuel Level Sensor Resistance

Check the resistances between fuel level sensor main terminals 1 and 2 as well as sub terminals 1 and 2 of the fuel pump module, respectively.
Standard value:

Fig 1: Checking Fuel Level Sensor Resistance (1 Of 2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Check that resistance value changes smoothly when the float moves slowly between points.

Fig 2: Checking Fuel Level Sensor Resistance (2 Of 2)
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
If all checks are correct, go to fuel unit height check. If any check is not correct, replace the fuel pump module or fuel level sensor (sub).