Vehicles With Auxiliary Fuel Pump

WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.

On vehicles with the auxiliary fuel pump the FPDM is located in the rear of the front left wheel arch behind the front left wheel. The FPDM is secured to studs on the side member reinforcement panel with two nuts.

The FPDM regulates the operation of the auxiliary fuel pump located in the engine compartment. The FPDM regulates the flow supplied by controlling the operation of the auxiliary fuel pump via a hardwired connection. The FPDM is controlled by the PCM using a PWM output signal.

The FPDM is powered by a supply from the fuel pump relay in the Rear Junction Box (RJB). The fuel pump relay is energized on opening the driver's door, pressing the start button only or pressing the start button and the footbrake (which initiates engine cranking).

The FPDM supplies power to the auxiliary fuel pump to maintain pressure and flow in the fuel delivery line to the High Pressure (HP) fuel pump.

If the Restraints Control Module (RCM) outputs a crash signal on the high speed Controller Area Network (CAN) powertrain systems bus, the Body Control Module/Gateway Module (BCM/GWM) assembly de-energizes the fuel pump relay to prevent any further fuel being pumped to the engine.

The PCM receives a monitoring signal from the FPDM. Any DTC's produced by the FPDM are stored by the PCM.

DTC's can be retrieved from the PCM using an approved Jaguar diagnostic system. The FPDM itself cannot be interrogated by the approved Jaguar diagnostic system.