Fuel Level Sensor: Description and Operation

Component Description For The Fuel Level Sensor

Component Identification:

Location
The fuel level sensor is located in the fuel tank. If the fuel tank is divided into two chambers, each chamber has a fuel level sensor.

Task
Determines the fuel level for the following functions:
Fuel level indicator
- Leakage check of regeneration system I
- Misfire detection.

Design
Float-and-lever sensor with two wiper contacts (potentiometer) and a float.

Function
To change the resistance values depending on the fuel level. The signals are transmitted to the nearest SAM control unit (e.g. rear SAM control unit with fuse and relay module for models 171, 211, 219, 221). The signal are digitalized there and transmitted to the CAN data bus.