Fuel Tank And Lines - TDV6 3.0L Diesel: Operation: Notes

WARNING: This page is about a different car, the 2019 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

The fuel pump in the fuel delivery module is supplied power via a fuel pump relay in the Rear Junction Box (RJB). The fuel pump relay is controlled by the Body Control Module/Gateway Module (BCM/GWM) assembly and is active when the ignition is in all power modes except for power mode 0 (off). The Powertrain Control Module (PCM) is connected to the BCM/GWM to receive a 'wake-up' message and in the event of an accident the Restraints Control Module (RCM) outputs a crash signal to the BCM/GWM to disable the fuel pump relay.

Inside the fuel tank there are two fuel level sensors; 'A' and 'B', which output signals to the BCM/GWM for fuel tank fuel level. This information is processed by the BCM/GWM and passed to the instrument cluster to display the remaining fuel level and low fuel warning.