SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMERCURY2003SABLE GS, 4D WAGON, 3.0 2, AX4SREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - THEORY & OPERATION - CNG, FLEX-FUEL & GASOLINECOMPUTERIZED ENGINE CONTROLSINPUT DEVICESFUEL PUMP MONITOR (WITH FUEL PUMP DRIVER MODULE)
2003 Mercury Sable GS, 4D Wagon, 3.0 2, AX4S

Fuel Pump Monitor (With Fuel Pump Driver Module)

2003 Mercury Sable GS, 4D Wagon, 3.0 2, AX4SSECTION Fuel Pump Monitor (With Fuel Pump Driver Module)

Fuel Pump Driver Module (FPDM) communicates diagnostic information to PCM through Fuel Pump Monitor (FPM) circuit. This information is sent by FPDM as a duty cycle signal. The 3 duty cycle signals that may be sent are listed in FUEL PUMP DRIVER MODULE DUTY CYCLE SIGNALS  table. PCM uses this signal to verify FPDM is powered and able to communicate on the FPM circuit.

FUEL PUMP DRIVER MODULE DUTY CYCLE SIGNALS

Duty Cycle Percent (1) On Time (ms) Comments (2) FP_M PID
25 250 (3) FPDM Did Not Receive Fuel Pump (FP) Duty Cycle Command From PCM, Or Duty Cycle Received Was Invalid 15-60
50 500 "All Ok" Output From FPDM. With This Input, PCM Can Verify FPDM Is Powered And Able To Communicate On FPM Circuit 80-125
75 750 FPDM Has Detected Fault In Circuits Between Fuel Pump And FPDM 250-400
(1) If a duty cycle meter and breakout box is used, be aware that these values may be reversed depending on trigger setting of specific meter (for example, 25 percent from FPDM may read as 75 percent on duty cycle meter depending on trigger setting).
(2) Some scan tools may not have capability to access FP_M PID. Percentage will fluctuate randomly. It is okay for value to briefly go outside this range, then return.
(3) Refer to FUEL PUMP  under OUTPUT SIGNALS.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.