Fuel Pump Monitor (FPM) - ERFS: Notes
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NOTE:
The Mustang 5.2L uses 2 fuel pump control modules to control fuel for the fuel delivery system. The PCM individually monitors both fuel pump control modules through the FPM and FPM2 circuits.
The fuel pump control modules communicate diagnostic information to the PCM through the FPM and FPM2 circuits. This information is sent by the fuel pump control modules as a duty cycle signal. The 3 duty cycle signals that may be sent are listed in the following table.