The movement of the needle of the fuel quantity indicator is varied by contact with «weight». It is provided by a fuel quantity sensor, the resistance of which changes up or down depending on the filling of the tank. Removal of the fuel quantity indicator sensor is described in the chapter «Fuel tank and fuel pump».
Faults
Level too high or too low: Faulty voltage regulator (how to remove it is described at the beginning of the chapter, in the section «Disassembly», or the fuel gauge is incorrectly adjusted (see next section).
No indicators: the voltage stabilizer is faulty, or the sensor in the gas tank, or the indicator.
On the left front of the gearbox we see the reverse light switch plug (1) and speedometer pulse sensor (2). To remove the speedometer pulse sensor, after pressing the safety clip, disconnect the plug (3), push down the latch (arrow), rotate the pulse sensor and pull it out.
Left: to adjust the petrol quantity indicator, as described below, turn the adjusting wheel (arrow).
Right: in order not to dismantle the combination instrument panel for this, it is shown here how to use a needle (1) turn the wheel (2). The needle must enter the combination instrument panel at the rear.
Adjustment of the fuel quantity indicator
Empty the fuel tank to the last drop.
Pour exactly 4 liters of fuel into the tank.
Switch on the ignition and wait 2 minutes.
The indicator arrow should now be at the first large bar of the red reserve field.
If this is not the case, you can adjust the indicator with the small set screw at the bottom left of the instrument.
Use small pliers to remove the black plug next to the mileage reset button and turn the set screw with an Allen key.
Checking the Fuel Quantity Indicator Sensor
Open luggage compartment trim, unscrew black cover, disconnect multi-pin connector underneath.
Connect the auxiliary wire to the plug connector of the purple-black wire and short to «mass».
Turn on the ignition for a short time: if the indicator needle deviates completely, then the wiring and the indicator itself are in order. If there is no movement of the arrow, then the sensor in the fuel tank is faulty.
If the arrow stays in position «empty tank», which means that the cause of the malfunction should be sought in the wiring, in the voltage stabilizer or in the device. The sensor itself in this case is most likely in order.
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