Fuel gauge: Notes

The fuel gauge shows the driver how much fuel is left in the tank. It comprises a fuel gauge in the main instrument unit and a level sensor in the tank.

The level sensor has a variable resistance, the value of which corresponds to the level of the sensor float in the tank. The resistance will increase with the fuel level.

The sensor is connected to the main instrument control module pin 4, from which it is supplied with B+, and it is grounded to pin 10.

The control module detects the resistance of the sensor and controls the voltage pulses to the fuel gauge so that the gauge needle position corresponds with the resistance of the sensor.

In order to provide a more exact reading when there is only a little fuel in the tank, the main instrument unit control module will switch to measuring the fuel consumption when the amount of fuel in the tank is below 10 litters.

The main instrument unit control module sends information on the fuel level to the buses.