Fuel gauge: Notes

The fuel gauge gives the driver information on how much fuel is left in the tank. It consists of a fuel gauge in the main instrument unit and a level sensor in the tank.

The level sensor has variable resistance where the value corresponds to the level of the float sensor in the tank, and the resistance increases with a higher fuel level.

The sensor is connected to the main instrument unit control module, pin 4, when supplied with B+ and grounded in pin 10.

The control module knows the resistance value of the sensor and sends the voltage pulses to the fuel gauge so that the needle position corresponds to the resistance value of the sensor.

To enable a more accurate display with small amounts of fuel in the tank, the main instrument display control module switches to measuring fuel consumption once the amount of fuel drops below 10 liters.

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