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HOMESERVICE MANUALSFORD2021TRANSIT-350 XL, 3.5L ENG VIN G, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 510 (ENGINE CONTROLS - PINPOINT TEST DO: BAROMETRIC PRESSURE (BARO) SENSOR THROUGH PINPOINT TEST HC: FUEL DELIVERY SYSTEM - (EXCEPT DIESEL & HYBRID))PINPOINT TEST HC: FUEL DELIVERY SYSTEMTEST PROCEDURE
2021 Ford Transit-350 XL, 3.5L Eng VIN G, RWD

Test Procedure

2021 Ford Transit-350 XL, 3.5L Eng VIN G, RWDSECTION Test Procedure
WARNING: This page does not describe the selected car, but rather 26 other vehicles, including the 2020 Lincoln Navigator, 2020 Lincoln Nautilus, 2020 Lincoln MKZ, 2020 Lincoln Corsair, and 2020 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
  1. HC1 CHECK THE SYSTEM INTEGRITY 
    • Visually inspect the complete fuel delivery system for damage and leakage.
    • Check the following:
      • fuel lines and connections
      • relays
      • fuel tank
      • fuel pump
      • fuel pressure regulator
      • fuel rail at injectors
      • damaged connector pins
      • electrical connectors not fully engaged
    • Verify the vehicle has followed the maintenance schedule. A new fuel filter should have been installed within the last 48, 280 km (30, 000 miles) (vehicles with inline fuel filter).
    • Verify the inertia fuel shutoff (IFS) switch is set (button pushed in). Refer to the Owner's Literature, Roadside Emergencies for the location of the IFS switch (if equipped).
    • Verify the fuse integrity.
    • Verify the battery is fully charged.
    • Verify clean sufficient fuel.

    Is a concern present? 

    Yes No
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.    		 GO to  HC2.
  2. HC2 CHECK THE FUEL PRESSURE 
    • Ignition OFF.
    • Relieve the fuel pressure. Refer to the Fuel System article for the Fuel System Pressure Release procedure.
    • Mechanical fuel pressure gauge connected.
    • Ignition ON, engine OFF.
    • Pressurize the fuel system. Refer to the Fuel System article for the Fuel System Pressure Release procedure to pressurize the fuel system.
    • FP Assembly connector connected.
    • Cycle the ignition several times to charge the fuel system.
    • Compare the fuel pressure reading to the Fuel System Specification Chart.

    Is the fuel pressure within range? 

    Yes No
    For DTCs P0171, P0174, P2195, P2197, P2BEC, P2BEE, P2BF0, or P2BF2, GO to  HC14.
    For DTCs P008A or P008B, GO to  HC11.
    For E100 vehicles, GO to  HC11. For all others, GO to  HC5.    		 GO to  HC3.
  3. HC3 CHECK THE FUEL PUMP GROUND CIRCUIT FOR AN OPEN CIRCUIT 
    • Ignition OFF.
    • FP Assembly connector disconnected.
    • For Continental 3.0L, Ford GT, MKZ 3.0L and Mustang 5.2L,
    • Measure the resistance between:
      (+) FP Assembly Connector, Harness Side (-)
      FPRTN Ground
      FP2RTN Ground
    • For all others,
    • Measure the resistance between:
      (+) FP Assembly Connector, Harness Side (-)
      FPRTN Ground

    Are the resistances less than 5 ohms? 

    Yes No
    GO to  HC4. REPAIR the open circuit. Clear the PCM DTCs. REPEAT the self-test.
  4. HC4 CHECK THE FUEL PUMP POWER CIRCUIT FOR AN OPEN 
    NOTE: During output state control, the fuel pump stays commanded on for only about 5 seconds. Be aware that output state control turns the FP off after a calibrated time. If this happens, command the output ON to continue testing.
    • Verify the inertia fuel shutoff (IFS) switch is set (button pushed in). Refer to the Owner's Literature, Roadside Emergencies for the location of the IFS switch (if equipped).
    • Ignition ON, engine OFF.
    • For Continental 3.0L, Ford GT, MKZ 3.0L and Mustang 5.2L,
    • Measure the voltage between:
      (+) FP Assembly Connector, Harness Side (-) Vehicle Battery
      FPPWR Negative terminal
      FP2PWR Negative terminal
    • For all others,
    • Measure the voltage between:
      (+) FP Assembly Connector, Harness Side (-) Vehicle Battery
      FPPWR Negative terminal
    • Access the PCM and control the FP (MODE) PID.
    • Command the fuel pump ON.

    Does the voltage increase with the PID commanded ON? 

    Yes No
    For Vehicles that do not start, GO to  HC15.
    For all others, GO to  HC11.    		 GO to PINPOINT TEST KC .
  5. HC5 CHECK THE SEPARATION LEVEL OF THE ETHANOL/WATER MIXTURE AND GASOLINE IN THE FUEL 
    NOTE: This step requires the use of a locally obtained 200 ml beaker and a 25 ml graduated cylinder.
RENDER: 1.0x

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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.