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

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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.