Fuel Gauge Sender: Description and Operation

GF47.10-P-2010AMG Component Description For The Fuel Level Sensor







Each chamber of fuel tank contains a fuel gage sensor.







The right fuel level sensor is located in the right fuel tank chamber. The left fuel level sensor (with float in the left fuel tank chamber) is located in the middle of the fuel tank.

Task
Determines the fuel level for the following functions:
- Fuel level indicator
- Leak tightness test of the regeneration system (for (USA))
- Combustion misfire detection

Function
The float changes the position of the lever (with the double potentiometer) in line with the fuel level. This changes the resistance value of the double potentiometer and thereby influences the output voltage, which is a measure for the fuel level.

Both sliding contacts of the double potentiometer are switched in parallel.

Model 164, 251
Each fuel tank chamber has a fuel level indicator sensor. Both the voltage signals are transmitted separately to the rear SAM control unit (N10/8) which processes the signals accordingly and transmits them to the instrument cluster via the CAN data bus.A1

Model 209, 211, 216, 219, 221
Each fuel tank chamber has a fuel level indicator sensor. Both voltage signals are transmitted separately to the rear SAM control unit with fuse and relay module, (N10/2) which processes the signals accordingly and transmits them to the instrument cluster over the CAN data bus (A1).