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Home >> Ford >> 2017 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Pinpoint Test A: No Start Through Pinpoint Test Dm: Manifold Pressure Sensors - (Except Diesel & Hybrid) >> Pinpoint Test Dd: Fuel Pressure, Fuel Rail Pressure (FRP) And Fuel Rail Pressure Temperature (FRPT) Sensors >> Test Procedure

Test Procedure

  1. DD1 CHECK FOR DTCS 

    Are DTCs P0087, P0088, P0181, P0182, P0183, P018B, P018C, P018D, P0192 or P0193 present? 

    Yes No
    For DTCs P0181, P0182 or P0183, GO to  DD13.
    For DTCs P018B, P018C or P018D, GO to  DD2.
    For all others, GO to  DD8.    		 RETURN to SYMPTOM CHARTS for further direction.
  2. DD2 CHECK THE VREF AND SIGRTN CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • For F-150 3.5L GTDI and Ford GT,
    • FRPT Sensor connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) FRPT Sensor Connector, Harness Side (-) FRPT Sensor Connector, Harness Side
    VREF SIGRTN
    • For all others,
    • Fuel Pressure Sensor connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) Fuel Pressure Sensor Connector, Harness Side (-) Fuel Pressure Sensor Connector, Harness Side
    VREF - Pin 3 SIGRTN - Pin 2

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    GO to  DD3. GO to PINPOINT TESTS C .
  3. DD3 CHECK THE LOW PRESSURE CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • PCM connector disconnected.
    • For F-150 3.5L GTDI and Ford GT,
    • Measure the resistance between:
    (+) FRPT Sensor Connector, Harness Side (-) PCM Connector, Harness Side
    FRP-PFI FRP-PFI
    • For all others,
    • Measure the resistance between:
    (+) Fuel Pressure Sensor Connector, Harness Side (-) PCM Connector, Harness Side
    FLP - Pin 1 FLP

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DD4. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  4. DD4 CHECK THE LOW PRESSURE CIRCUITS FOR A SHORT TO GROUND 
    • For F-150 3.5L GTDI and Ford GT,
    • Measure the resistance between:
    (+) FRPT Sensor Connector, Harness Side (-)
    FRP-PFI Ground
    • For all others,
    • Measure the resistance between:
    (+) Fuel Pressure Sensor Connector, Harness Side (-)
    FLP - Pin 1 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DD5. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  5. DD5 CHECK THE LOW PRESSURE CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • For F-150 3.5L GTDI and Ford GT,
    • Measure the voltage between:
    (+) FRPT Sensor Connector, Harness Side (-)
    FRP-PFI Ground
    • For all others,
    • Measure the voltage between:
    (+) Fuel Pressure Sensor Connector, Harness Side (-)
    FLP - Pin 1 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. For DTC P018B, GO to  DD7.
    For all others, GO to  DD6.
  6. DD6 CHECK THE LOW PRESSURE CIRCUITS FOR AN INTERMITTENT CONCERN 
    • Ignition OFF.
    • For F-150 3.5L GTDI and Ford GT,
    • FRPT Sensor connector connected.
    • PCM connector connected.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the FLP_V (VOLT) PID.
    • While observing the PID, carry out the following:
      • Tap on the sensor to simulate road shock
      • Wiggle the sensor connector
      • Wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM
    • Check the connector for damage or corrosion.
    • For all others,
    • Fuel Pressure Sensor connector connected.
    • PCM connector connected.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the FLP_V (VOLT) PID.
    • While observing the PID, carry out the following:
      • Tap on the sensor to simulate road shock
      • Wiggle the sensor connector
      • Wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM
    • Check the connector for damage or corrosion.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new sensor in question.
    REFER to the fuel system WARNING information at the beginning of Pinpoint Test HC. GO to PINPOINT TESTS HC . REFER to the Service Information, Fuel Tank and Lines.
    Clear the PCM DTCs. REPEAT the self-test.
  7. DD7 COMPARE THE FLP PID TO THE MECHANICAL GAUGE 
    NOTE: The vehicle may exhibit a long crank until the fuel system is pressurized.
    • Ignition OFF.
    • Relieve the fuel pressure. Refer to the Service Information, Fuel System for the Fuel System Pressure Release procedure.
    • Mechanical fuel pressure gauge connected.
    • Disable the fuel pump.
    • Ignition ON, engine OFF.
    • Monitor the mechanical gauge.
    • Access the PCM and monitor the FLP (PRESS) PID.
    • Compare the FLP PID value to the mechanical gauge.
    • Ignition OFF.
    • Pressurize the fuel system. Refer to the Service Information, Fuel System for the Fuel System Pressure Release procedure to pressurize the fuel system.
    • Ignition ON, engine running.
    • Allow the fuel pressure to stabilize.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Compare the FLP PID value to the mechanical gauge.

    Are the FLP PID values within 153 kPa (22 psi) of the mechanical gauge readings? 

    • Measure the voltage between:
    Yes No
    The system is operating correctly at this time. GO to PINPOINT TESTS Z .
  8. DD8 CHECK THE VREF AND SIGRTN CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • For Mustang 5.2L,
    • FRPT Sensor connector disconnected.
    • Ignition ON, engine OFF.
    (+) FRPT Sensor Connector, Harness Side (-) FRPT Sensor Connector, Harness Side
    VREF SIGRTN
    • For all others,
    • FRP Sensor connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) FRP Sensor Connector, Harness Side (-) FRP Sensor Connector, Harness Side
    VREF SIGRTN

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    GO to  DD9. GO to PINPOINT TESTS C .
  9. DD9 CHECK THE FRP CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • PCM connector disconnected.
    • For Mustang 5.2L,
    • Measure the resistance between:
    (+) FRPT Sensor Connector, Harness Side (-) PCM Connector, Harness Side
    FRP FRP
    • For all others,
    • Measure the resistance between:
    (+) FRP Sensor Connector, Harness Side (-) PCM Connector, Harness Side
    FRP FRP

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DD10. REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  10. DD10 CHECK THE FRP CIRCUIT FOR A SHORT TO GROUND 
    • For Mustang 5.2L,
    • Measure the resistance between:
    (+) FRPT Sensor Connector, Harness Side (-)
    FRP Ground
    • For all others,
    • Measure the resistance between:
    (+) FRP Sensor Connector, Harness Side (-)
    FRP Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DD11. REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.
  11. DD11 CHECK THE FRP CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • For Mustang 5.2L,
    • Measure the voltage between:
    (+) FRPT Sensor Connector, Harness Side (-)
    FRP Ground
    • For all others,
    • Measure the voltage between:
    (+) FRP Sensor Connector, Harness Side (-)
    FRP Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. For DTCs P0087 or P0088, GO to PINPOINT TESTS Z .
    For all others, GO to  DD12.
  12. DD12 CHECK THE FRP CIRCUIT FOR AN INTERMITTENT CONCERN 
    • Ignition OFF.
    • PCM connector connected.
    • For Mustang 5.2L,
    • FRPT Sensor connector connected.
    • For all others,
    • FRP Sensor connector connected.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the FRP (VOLT) PID.
    • While observing the PID, carry out the following:
      • Tap on the sensor to simulate road shock
      • Wiggle the sensor connector
      • Wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM
    • Check the connector for damage or corrosion.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new sensor in question. REFER to the fuel system WARNING information at the beginning of PINPOINT TEST HC . GO to PINPOINT TESTS HC . REFER to the Service Information, Electronic Engine Controls.
    Clear the PCM DTCs. REPEAT the self-test.
  13. DD13 CHECK THE VREF AND SIGRTN CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • FRPT Sensor connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) FRPT Sensor Connector, Harness Side (-) FRPT Sensor Connector, Harness Side
    VREF SIGRTN

    Is the voltage between 4.5 - 5.5 V? 

    Yes No
    GO to  DD14. GO to PINPOINT TESTS C .
  14. DD14 CHECK THE FRT CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • PCM connector disconnected.
    • Measure the resistance between:
    (+) FRPT Sensor Connector, Harness Side (-) PCM Connector, Harness Side
    FRT FRT

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DD15. REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  15. DD15 CHECK THE FRT CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
    (+) FRPT Sensor Connector, Harness Side (-)
    FRT Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DD16. REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test.
  16. DD16 CHECK THE FRT CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
    (+) FRPT Sensor Connector, Harness Side (-)
    FRT Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs. REPEAT the self-test. For DTC P0181, GO to PINPOINT TESTS Z .
    For all others, GO to  DD17.
  17. DD17 CHECK THE FRT CIRCUIT FOR AN INTERMITTENT CONCERN 
    • Ignition OFF.
    • PCM connector connected.
    • FRPT Sensor connector connected.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the FRT_V (VOLT) PID.
    • While observing the PID, carry out the following:
      • Tap on the sensor to simulate road shock
      • Wiggle the sensor connector
      • Wiggle, shake, and bend small sections of the wiring harness while working from the sensor to the PCM
    • Check the connector for damage or corrosion.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 INSTALL a new FRPT sensor.
    REFER to the fuel system WARNING information at the beginning of PINPOINT TEST HC . GO to PINPOINT TESTS HC . REFER to the Service Information, Electronic Engine Controls.
    Clear the PCM DTCs. REPEAT the self-test.
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