Low Fuel Lamp/Indicator: Description and Operation

With the ignition key turned to the "ON" position, the fuel level sensor resistance becomes small by its exposure from the fuel, when the fuel level comes down.

When the resistance value becomes lower than the specified value, the low fuel level warning light comes on to indicate that the fuel residual quantity is small.

When the gauge indicator shows approximately 1/8 tank of fuel remaining, the LED will light, alerting the driver to a low fuel condition.