Displaying Fuel Level

Networking:

Networking
- The fuel gauge sensor (64) changes its resistance according to the fuel tank level. The fuller the tank, the lower the resistance.
- The resistance of the fuel gauge sensor (B4) is read in by the rear SAM control module (N10/8).
- The rear SAM control module (N10/8) converts the resistance values of the fuel gauge sensor (B4) into a percentage value. (A full tank corresponds to 100%)
- This percentage value is placed on the CAN interior by the rear SAM control module (N10/8).
- The instrument cluster (A1) reads in this percentage value from the CAN interior and actuates the fuel level gauge (A1p2) and if necessary the fuel reserve indicator lamp (A1e4) accordingly.
The fuel level, gauge (A1p2) is driven via a stepper motor.

Fuel level display
- From ignition/starter switch in position "2" the current fuel tank level is displayed in the fuel level gauge (A1p2).
- If the vehicle is refuelled with ignition/starter switch in position "2", refuelling recognition only takes place (updating of the display), after a refuelling quantity of at least 5 liters.
In each case the display is updated once the ignition is switched on again. The display is always updated with a delay. This suppresses variations in the display, e.g. when cornering.

Reserve range
- The reserve range extends from 0 - R. This corresponds to a quantity of 0 - approx. 12 liters on the standard fuel tank and 0 - approx. 10 liters for the skibag version.
- If the reserve range is reached, the fuel reserve indicator lamp (A1e4) comes on yellow when the engine is running. It is actuated with a delay to prevent the lamp flickering.

Type of tank coding
Coding the type of tank is not necessary. The fuel gauge sensor (34) is designed so that a certain resistance value corresponds to the same percentage value for both tanks.


NOTE: In the event of a fault the pointer of the fuel level gauge (A1p2) is moved to the left stop. The fuel reserve indicator lamp (A1e4) is not actuated.