Fuel Reserve Indicator Lamp

Fuel reserve indicator lamp

Schematic:

When there is about 10 litres of fuel left, a lamp will come on to indicate low fuel level. The lamp is powered by the main instrument unit and is grounded internally by the main instrument unit to turn it on.

The main instrument unit lights the lamp for 3 seconds when the ignition is switched on.

Diagnostics
An open circuit/short circuit sets diagnostic trouble code B1720. The gauge needle indicates 0 litres and the fuel reserve indicator lamp lights up.