Fuel Level Sensor

The fuel level sensor in the pump unit has a float arm with a slip contact which is in contact with a stepping resistor.

The level sensor is voltage fed from pin 33 on the control module and is grounded by pin 26. The Electronic Display Unit (EDU) measures the resistance of the level sensor which increases with the level of fuel in the tank.

The fuel level is measured every 50 ms. The fuel gauge display is based on an average value which is calculated every 32 seconds.