Prizm L4-108 18L DOHC VIN 8 MFI (1998) Fuel Level Sensor - Technical Service Bulletins
Fuel Level Sensor: Description and Operation
Fuel Level Sensor
Fuel Level Sensor
The fuel level sensor (fuel gauge sending unit) (4) is part of the fuel sender assembly (1). The fuel level sensor consists of a float, a float arm and a
variable resistor. The fuel level is measured by the position of the float in the fuel tank, and is indicated by a gauge in the instrument panel (I/P) cluster
assembly. When the fuel level changes, the float position changes. The change in the float position increases or decreases the resistance reading of the
variable resistor. The change in the resistance causes the position of the fuel gauge pointer to change.