Fuel gauge

Fig 1: Identifying Fuel Gauge Input And Output Signals

Courtesy of VOLVO CARS OF NORTH AMERICA.

There are two sensors in the fuel tank which transmit signals about the fuel level to the rear electronic module (REM). The rear electronic module (4/58) sends the values on to the driver information module (5/1), which receives the signals, interprets them and displays the fuel level on the fuel gauge. When the fuel level is low a yellow lamp lights to inform the driver.

The fuel gauge is not sensitive to rapid change. This is to prevent incorrect values being displayed when cornering or driving on slopes for example.