Fuel Level Sensors

WARNING: This page is about a different car, the 2015 Land Rover LR2, 2014 Land Rover LR2, and 2013 Land Rover LR2. However, it is still accessible from the selected car via links, so may be relevant.

Two fuel level sensors are used to measure the amount of fuel remaining in the LH and RH sides of the fuel tank. The LH level sensor is attached to the tank internal bracket and the RH level sensor is attached to the outside of the fuel pump swirl pot. Both sensors are connected to the vehicle wiring harness via the external electrical connector on the top flange assembly.

The electrical output signal is proportional to the amount of fuel remaining in each side of the fuel tank and the position of the float arms. The measured resistance is measured by the CJB which implements an anti-slosh function. This monitors the signal and updates the fuel level signal to the instrument cluster at regular intervals, preventing constant pointer movement caused by fuel movement in the tank due to cornering or braking. A low level fuel warning indicator is incorporated in the instrument cluster which illuminates when the fuel level in the tank falls below a predetermined level.

The fuel level sensor signals are converted into CAN bus messages by the CJB and are used by the instrument cluster for fuel gage and fuel warning indicator operation and are also monitored by the ECM to store OBD (on-board diagnostic) P codes for mis-fire detection when the fuel level is below a predetermined capacity.