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HOMESERVICE MANUALSFORD2021EDGE SE, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 7 (ENGINE CONTROLS - DESCRIPTION & OPERATION (EXCEPT DIESEL & HYBRID))FUEL SYSTEMSFUEL PUMP CONTROL - ERFS
2021 Ford Edge SE, 4WD

Fuel Pump Control - ERFS

2021 Ford Edge SE, 4WDSECTION Fuel Pump Control - ERFS
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2018 Lincoln Navigator, 2018 Lincoln MKZ, 2018 Lincoln MKX, 2018 Lincoln MKT, and 2018 Lincoln MKC. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The Mustang 5.2L uses 2 fuel pump control modules to control fuel for the fuel delivery system. The PCM sends one FP duty cycle on the FPC circuit. Both fuel pump control modules use this circuit.

The FP signal is a duty cycle command sent from the PCM to the fuel pump control modules. The fuel pump control modules use the FP command to operate the fuel pumps at the speed requested by the PCM or to turn the pumps OFF. When the ignition is turned ON, the electric fuel pumps run for about 1 second and are requested OFF by the PCM if engine rotation is not detected.

FUEL PUMP DUTY CYCLE OUTPUT FROM PCM

FP Duty Cycle Command PCM Status Fuel Pump Control Module Actions
0-15% Invalid OFF duty cycle. The fuel pump control module sends a 20% duty cycle signal on the fuel pump monitor (FPM) circuit. The fuel pump is OFF.
5-51% Normal operation. The fuel pump control module operates the fuel pump at the speed requested. FP duty cycle times 2 equals pump speed % of full ON. For example, FP duty cycle equals 42%. 42 times 2 equals 84. Pump is run at 84% of full ON. The fuel pump control module sends a 60% duty cycle signal on FPM circuit.
51-67% Invalid ON duty cycle. The fuel pump control module sends a 20% duty cycle signal on the FPM circuit. The fuel pump is OFF.
67-83% Valid OFF duty cycle. The fuel pump control module sends a 60% duty cycle signal on FPM circuit. The fuel pump is OFF.
83-100% Invalid ON duty cycle. The fuel pump control module sends a 20% duty cycle signal on the FPM circuit. The fuel pump is OFF.

For additional information, refer to POWERTRAIN CONTROL HARDWARE , Fuel Pump Control Module.

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