2010 Mercury Mariner Premier, 2.5 7, FWDFACTORY OEM SERVICE PROCEDURE

DTC P025A: Fuel Pump Module Control Circuit/Open

DTC P025A: FUEL PUMP MODULE CONTROL CIRCUIT/OPEN

Description:  The powertrain control module (PCM) monitors the fuel pump command (FPC) circuit for a concern. When the PCM commands the fuel pump (FP) ON, the PCM is able to detect a short to voltage on the FPC circuit. When the PCM commands the FP OFF, the PCM is able to detect an open circuit or a short to ground on the FPC circuit. The test fails if the voltage is less than or greater than a calibrated limit, for a calibrated amount of time.
Possible Causes: 
  • FPC circuit open or short to ground
  • FPC circuit short to voltage
  • Damaged fuel pump control module
Diagnostic Aids:  Check for any harness concerns.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST KC .
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