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Home >> Ford >> 2016 >> Transit-150 Base, 3.2L Eng VIN V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Pinpoint Tests (Diesel) >> Pinpoint Tests MA: Fuel Pump Control - Low Pressure Pump >> Test Procedure

Test Procedure

  1. MA1 PRELIMINARY DIAGNOSIS 
    NOTE: For F-650/F-750 and F-Series Super Duty, diagnose DTC P008A before diagnosing P0087.

    Are DTCs P0087, P008A, P0627, P0628, P0629, P062A, P0230, P0231 or P0232 present? 

    Yes No
    For Transit with DTCs P0087 or P008A, GO to  MA8.
    For F-650/F-750 and F-Series Super Duty with DTCs P0087 or P008A, GO to  MA2.
    For all others, GO to  MA11.    		 For symptoms without DTCs, GO to  MA2.
    For all others, RETURN to SYMPTOM CHARTS for further direction.
  2. MA2 CHECK THE VPWR VOLTAGE 
    NOTE: For a no start concern, follow the Yes answer.
    NOTE: An open VPWR circuit concern is indicated by a VPWR PID value greater than 15 V while the engine is running.
    • Ignition ON, engine running.
    • Access the PCM and monitor the VPWR (VOLT) PID.

    Is the voltage less than 15 V? 

    Yes No
    GO to  MA3. REPAIR the open VPWR circuit.
    Clear the PCM DTCs. REPEAT the self-test.
  3. MA3 CHECK THE LOW PRESSURE FUEL SYSTEM 
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the FLP (PRESS) PID.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON then OFF.

    Is the PID value greater than 483 kPa (70 psi)? 

    Yes No
    For DTCs P0087 or P008A, GO to  MA4.
    For all others, CARRY OUT the Sufficient Clean Fuel Test. REFER to DIAGNOSTIC PROCEDURES .
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA4.
  4. MA4 CHECK THE LOW PRESSURE FUEL SYSTEM PRESSURE AFTER THE SECONDARY FUEL FILTER 
    NOTE: The FP will run for 30 seconds then shut off at ignition ON, engine OFF.
    • Ignition OFF.
    • Connect the low pressure fuel supply line to the secondary fuel filter.
    • Disconnect the injection pump fuel supply tube from the fuel filter to fuel injection pump supply tube quick connect coupling.
    • Install the Fuel Line Adapter 310-159 or equivalent and the DSL ENG Pressure Test Kit 014-00761 or equivalent to the fuel filter to fuel injection pump supply tube quick connect coupling at the fuel injection pump supply tube.
    • For vehicles that start,
    • Road test the vehicle while accelerating under load while monitoring the fuel pressure gauge.
    • For vehicles that do not start,
    • Ignition ON, engine OFF.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON.

    Is the low pressure fuel system pressure greater than 379 kPa (55 psi)? 

    Yes No
    For DTC P0087, GO to PINPOINT TEST M .
    For DTC P008A, GO to PINPOINT TEST MD .
    For all others, CARRY OUT the Sufficient Clean Fuel Test. REFER to DIAGNOSTIC PROCEDURES .
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA5.
  5. MA5 REPLACE THE FUEL FILTERS 
    • Install new primary and secondary fuel filters. Refer to the Service Information, Fuel Tank and Lines.
    • For vehicles that start,
    • Road test the vehicle and accelerate under load while monitoring the fuel pressure gauge.
    • For vehicles that do not start,
    • Ignition ON, engine OFF.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON.

    Is the low pressure fuel system pressure greater than 379 kPa (55 psi)? 

    Yes No
    CARRY OUT the Sufficient Clean Fuel Test. REFER to DIAGNOSTIC PROCEDURES .
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA6.
  6. MA6 CARRY OUT THE FP PRESSURE TEST 
    NOTE: The FP will run for 30 seconds then shut off at ignition ON, engine OFF.
    • Connect the injection pump fuel supply tube to the fuel filter to fuel injection pump supply tube quick connect coupling.
    • Disconnect the low pressure fuel supply line from the outlet of the FP.
    • Install the Fuel Line Adapter 310-159 or equivalent and the DSL ENG Pressure Test Kit 014-00761 or equivalent between the low pressure fuel supply line and the outlet of the FP.
    • Ignition ON, engine OFF.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON.

    Is the low pressure fuel system pressure greater than 379 kPa (55 psi)? 

    Yes No
    INSPECT the low pressure fuel supply line between the FP and the secondary fuel filter for any restrictions. REPAIR as necessary. VERIFY the repair. REFER to the Service Information, Fuel Tank and Lines.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA7.
  7. MA7 CARRY OUT THE FP INLET RESTRICTION TEST 
    NOTE: The FP will run for 30 seconds then shut off at ignition ON, engine OFF.
    • Connect the low pressure fuel supply line at the outlet of the FP.
    • Disconnect the low pressure fuel supply line from the inlet of the FP.
    • Install the Fuel Line Adapter 310-159 or equivalent and the vacuum gauge of the DSL ENG Pressure Test Kit 014-00761 or equivalent between the low pressure fuel supply line and the inlet of the FP.
    • Ignition ON, engine OFF.
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON.

    Does the vacuum gauge indicate 10.2 kPa (3.0 In-Hg) or greater? 

    Yes No
    INSPECT the low pressure fuel supply line between the fuel tank and the FP for any restrictions. REPAIR as necessary. VERIFY the repair. REFER to the Service Information, Fuel Tank and Lines.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA11.
  8. MA8 CHECK THE LOW PRESSURE FUEL SYSTEM 
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the LP_FUEL_SW (MODE) PID.
    • Access the PCM and control the FP (MODE) PID.
    • Command the FP ON then OFF.

    Does the LP_FUEL_SW PID state cycle from Low to Not Low? 

    Yes No
    For DTCs P0087 or P008A, GO to  MA9.
    For all others, CARRY OUT the Sufficient Clean Fuel Test. REFER to DIAGNOSTIC PROCEDURES .
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA9.
  9. MA9 CHECK THE LOW PRESSURE FUEL SYSTEM PRESSURE 
    • Ignition OFF.
    • Connect the DSL ENG Pressure Test Kit 014-00761 or equivalent to the Schrader valve on the high pressure fuel injection pump supply line.
    • For vehicles that start,
    • Road test the vehicle while accelerating under load while monitoring the fuel pressure gauge.
    • For vehicles that do not start,
    • Ignition ON, engine OFF.
    • Access the PCM and control the FP (MODE) PID.
    • Command the FP ON.

    Is the low pressure fuel system pressure greater than 30 kPa (4.4 psi)? 

    Yes No
    For DTC P0087, GO to PINPOINT TEST M .
    For all others, GO to PINPOINT TEST MD .    		 GO to  MA10.
  10. MA10 REPLACE THE FUEL FILTER 
    • Install a new fuel filter. Refer to the Service Information, Fuel Tank and Lines.
    • For vehicles that start,
    • Road test the vehicle while accelerating under load while monitoring the fuel pressure gauge.
    • For vehicles that do not start,
    • Ignition ON, engine OFF.
    • Access the PCM and control the FP (MODE) PID.
    • Command the FP ON.

    Is the low pressure fuel system pressure greater than 30 kPa (4.4 psi)? 

    Yes No
    CARRY OUT the Sufficient Clean Fuel Test. REFER to DIAGNOSTIC PROCEDURES .
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA11.
  11. MA11 CHECK THE FP FOR VOLTAGE 
    • Ignition OFF.
    • Verify the IFS switch is set (button pressed) (if equipped).
    • FP connector disconnected.
    • Ignition ON, engine OFF.
    • For Transit,
    • Access the PCM and control the FP (MODE) PID.
    • Command the FP ON.
    • Connect a non-powered test lamp between:
      Point A FP Connector, Harness Side Point B FP Connector, Harness Side
      FPPWR FPRTN
    • For all others,
    • Access the PCM and control the FPL_CMD (MODE) PID.
    • Command the FP ON.
    • Connect a non-powered test lamp between:
      Point A FP Connector, Harness Side Point B FP Connector, Harness Side
      FPPWR-B FPGND

    Does the test lamp illuminate? 

    Yes No
    INSTALL a new FP. REFER to the Service Information, Fuel Tank and Lines.
    Clear the PCM DTCs. REPEAT the self-test.    		 For Transit, GO to  MA12.
    For all others, GO to  MA29.
  12. MA12 CHECK THE VOLTAGE TO THE FUEL PUMP CONTROL MODULE 
    • Ignition OFF.
    • Fuel Pump Control Module connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) Fuel Pump Control Module Connector, Harness Side (-)
      VPWR Fuel - Pin 1 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to  MA13. GO to  MA17.
  13. MA13 CHECK THE GND CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-)
      GND - Pin 4 Ground

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  MA14. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  14. MA14 CHECK THE FPC AND FPM CIRCUITS FOR AN OPEN 
    • PCM-B connector disconnected.
    • PCM-T connector disconnected.
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) PCM-B Connector, Harness Side
      FPC - Pin 3 FPC
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) PCM-T Connector, Harness Side
      FPM - Pin 7 FPM - Pin 31

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  MA15. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  15. MA15 CHECK THE FPC AND FPM CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-)
      FPC - Pin 3 Ground
      FPM - Pin 7 Ground

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  MA16. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  16. MA16 CHECK THE FPC AND FPM CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) Fuel Pump Control Module Connector, Harness Side (-)
      FPC - Pin 3 Ground
      FPM - Pin 7 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  MA18.
  17. MA17 CHECK THE VPWR FUEL CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • FP Relay connector disconnected.
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) FP Relay Connector, Harness Side
      VPWR Fuel - Pin 1 VPWR Fuel

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  MA26. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  18. MA18 CHECK THE FPPWR CIRCUIT AND THE FPRTN CIRCUIT AND THE INTERNAL FUEL PUMP RESISTANCE 
    • Ignition OFF.
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) Fuel Pump Control Module Connector, Harness Side
      FPPWR - Pin 5 FPRTN - Pin 8

    Is the resistance less than 10 ohms? 

    Yes No
    GO to  MA21. GO to  MA19.
  19. MA19 CHECK THE FPPWR AND FPRTN CIRCUITS FOR AN OPEN 
    • FP connector disconnected.
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) FP Connector, Harness Side
      FPPWR - Pin 5 FPPWR
      FPRTN - Pin 8 FPRTN

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  MA20. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  20. MA20 CHECK THE FP FOR AN OPEN 
    • Measure the resistance between:
      (+) FP Connector, Component Side (-) FP Connector, Component Side
      FPPWR FPRTN

    Is the resistance less than 10 ohms? 

    Yes No
    GO to  MA21. INSTALL a new FP. REFER to the Service Information, Fuel Tank and Lines.
    Clear the PCM DTCs. REPEAT the self-test.
  21. MA21 CHECK THE FPPWR AND FPRTN CIRCUITS FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-)
      FPPWR - Pin 5 Ground
      FPRTN - Pin 8 Ground

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  MA22. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  22. MA22 CHECK FOR FPPWR AND FPRTN CIRCUITS SHORTED TOGETHER 
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) Fuel Pump Control Module Connector, Harness Side
      FPPWR - Pin 5 FPRTN - Pin 8

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  MA23. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  23. MA23 CHECK THE FPPWR AND FPRTN CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) Fuel Pump Control Module Connector, Harness Side (-)
      FPPWR - Pin 5 Ground
      FPRTN - Pin 8 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  MA24.
  24. MA24 INTERMITTENT CHECK 
    • Ignition OFF.
    • Measure the resistance between:
      (+) Fuel Pump Control Module Connector, Harness Side (-) FP Connector, Harness Side
      FPPWR - Pin 5 FPPWR
      FPRTN - Pin 8 FPRTN
    • While monitoring the resistance measurement, wiggle, shake, and bend small sections of the wiring harness while working from the FP to the fuel pump control module.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  MA25.
  25. MA25 CHECK THE FUEL PUMP CONTROL MODULE FOR CORRECT OPERATION 
    • Fuel Pump Control Module connector connected.
    • PCM-B connector connected.
    • PCM-T connector connected.
    • Measure the voltage between:
      (+) FP Connector, Harness Side (-) FP Connector, Harness Side
      FPPWR FPRTN
    • Access the PCM and control the FP (MODE) PID.
    • Command the FP ON.

    Does the voltage increase with the PID commanded ON? 

    Yes No
    INSTALL a new FP. REFER to the Service Information, Fuel Tank and Lines.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new Fuel Pump Control Module. REFER to the Service Information, Fuel Charging and Controls.
    Clear the PCM DTCs. REPEAT the self-test.
  26. MA26 CHECK THE FUEL PUMP RELAY 
    • Carry out the fuel pump relay component test. Refer to the OEM WIRING DIAGRAMS COMPONENT TESTING article.

    Is a concern present? 

    Yes No
    INSTALL a new FP relay. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  MA27.
  27. MA27 CHECK THE B+ CIRCUITS FOR AN OPEN 
    • Measure the voltage between:
      (+) FP Relay Connector, Harness Side (-)
      B+ Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to  MA28. A B+ circuit concern is present. CHECK the condition of the related fuse/fuse links. If OK, REPAIR the open circuit. If the fuse/fuse link is damaged, CHECK the circuit for a short to ground before installing a new fuse/fuse link.
  28. MA28 CHECK THE FP CIRCUIT FOR AN OPEN 
    • BCM-C connector disconnected.
    • Measure the resistance between:
      (+) FP Relay Connector, Harness Side (-) BCM-C Connector, Harness Side
      FP FP - Pin 12

    Is the resistance less than 5 ohms? 

    Yes No
    INSTALL a new BCM. REFER to the Service Information, Multifunction Electronic Modules.
    Clear the PCM DTCs. REPEAT the self-test.    		 REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  29. MA29 CHECK THE FPGND CIRCUIT 
    • Ignition OFF.
    • Measure the resistance between:
      (+) FP Connector, Harness Side (-)
      FPGND Ground

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  MA30. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  30. MA30 CHECK THE FPPWR CIRCUIT FOR AN OPEN 
    NOTE: The fuel pump relay connector is integral to the battery junction box (BJB).
    • FP Relay connector disconnected.
    • Measure the resistance between:
      (+) FP Relay Connector, Harness Side (-) FP Connector, Harness Side
      FPPWR-A FPPWR-B

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  MA31. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  31. MA31 CHECK THE FUEL PUMP RELAY 
    • Carry out the fuel pump relay component test. Refer to the OEM WIRING DIAGRAMS COMPONENT TESTING article.

    Is a concern present? 

    Yes No
    INSTALL a new FP relay. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  MA32.
  32. MA32 CHECK FOR VOLTAGE AT THE FUEL PUMP RELAY 
    NOTE: The fuel pump relay connector is integral to the battery junction box (BJB).
    • Ignition OFF.
    • FP Relay connector disconnected.
    • Measure the voltage between:
      (+) FP Relay Connector, Harness Side (-)
      B+ Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  MA33. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  33. MA33 CHECK THE FPC CIRCUIT FOR AN OPEN 
    • PCM-B connector disconnected.
    • Measure the resistance between:
      (+) FP Relay Connector, Harness Side (-) PCM-B Connector, Harness Side
      FPC FPC

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  MA34. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  34. MA34 CHECK THE FPC CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) FP Relay Connector, Harness Side (-)
      FPC Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  MA35. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  35. MA35 CHECK THE FPC CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) FP Relay Connector, Harness Side (-)
      FPC Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. GO to  MA36.
  36. MA36 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the PCM connectors and make sure they seat correctly.
    • Carry out the PCM self-test.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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