Fuel Pump Driver Module
The Fuel Pump Driver Module (FPDM) is located under the floor pan near the fuel tank.
Operation of the Low Pressure (LP) fuel pump in the fuel tank mounted fuel pump module is regulated by the FPDM which is controlled by the Powertrain Control Module (PCM). The PCM sends a Pulse Width Modulation signal to the FPDM to control the operation of the Low Pressure (LP) fuel pump, in the fuel tank mounted fuel pump module.
The PWM signal from the PCM tells the FPDM the required speed for the LP fuel pump.
The FPDM will only energize the LP fuel pump if it receives a valid PWM signal, with a duty cycle of between 3.5% and 55%. To switch the LP fuel pump off, the PCM transmits a PWM signal with a duty cycle of 75%.
The FPDM has a switched power supply from the fuel pump relay, located in the Rear Junction Box (RJB).
The following conditions will energize the fuel pump relay:
- Opening the driver door.
- Operating the ignition switch.
- Operating the ignition switch with brakes applied - Engine crank.
The FPDM supplies power to the LP fuel pump, in the fuel tank mounted fuel pump module via hardwired connections. The FPDM adjusts the power to control the speed of the fuel pump, thus the fuel pressure and flow in the fuel delivery pipe.
If there is a fault the PCM receives a diagnostic notification signal from the FPDM. Any Diagnostic Trouble Codes (DTCs) produced by the FPDM are stored by the PCM. DTCs can be retrieved from the PCM using an Jaguar Land Rover (JLR) approved diagnostic equipment. The FPDM itself cannot be interrogated by the JLR approved diagnostic equipment.
For additional information, Refer to: FUEL TANK AND LINES - INGENIUM I4 2.0L PETROL - PHEV