9-5 Linear Sport Wagon (9600) L4-2.3L Turbo (B235) (2002)
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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 litres.
The main instrument unit control module sends information on the fuel level to the buses.
Fuel reserve indicator lamp
With about 10 litres of fuel remaining in the tank, the lamp lights up to indicate low fuel level. The lamp is supplied with current from the main
instrument unit and grounded by the main instrument unit's control module when it is turned on.
The main instrument unit lights this lamp for three seconds when the ignition is switched on.
Fuel consumption
The engine control module sends information on the fuel quantity consumed to the bus.
The main instrument unit control module uses the information to control the fuel gauge (under 10 litres).
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.
