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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2176 (Engine Controls - Pinpoint Test Hg: Positive Crankcase Ventilation (PCV) System Through Pinpoint Test JD: Crankshaft Position (CKP) Sensor - (Except Diesel & Hybrid)) >> PINPOINT TEST HG: Positive Crankcase Ventilation (PCV) System >> Test Procedure

Test Procedure

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  1. HG1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Check for DTCs P053A, P145E or P1489.
    • Are any of the above listed DTCs present? 
    Yes No
    GO to  HG5. For all other symptoms without DTCs, GO to  HG2.
  2. HG2 VISUAL INSPECTION OF THE PCV VALVE 
    NOTE: If the PCV valve or tube is electrically heated, verify the electrical connection. On some applications the vehicle may be equipped with a thermal harness that only provides electrical continuity when the temperature is less than 5°C (40°F) +/- 4°C (+/- 7°F). Typically this harness is located close to the PCV valve or tube.
    NOTE: If the PCV valve is water heated, verify the coolant hose and clip connections.
    • Check the PCV valve, hoses and connections for leaks or restrictions.
    • Verify the PCV valve maintenance schedule has been followed.
    • Verify the proper PCV valve part number.
    • Verify the PCV valve is clean.
    • Verify the fresh air tube and related hoses are clean and routed correctly.
    • Is a concern present? 
    Yes No
    REPAIR as necessary. VERIFY the symptom no longer exists. For an electrically heated PCV tube, GO to  HG4.
    For all others, GO to  HG3.
  3. HG3 STUCK PCV VALVE CHECK 
    • Disconnect the PCV valve from the valve cover.
    • Shake the PCV valve.
    • Does the PCV valve rattle when shaken? 
    Yes No
    REINSTALL the PCV valve.
    For PCV systems with electrical heating, GO to  HG4.
    For PCV systems without electrical heating, GO to  HG12.    		 The PCV valve is sticking. INSTALL a new PCV valve. VERIFY the symptom no longer exists.
  4. HG4 CHECK FOR A PCM CONTROLLED PCV HEATER 
    NOTE: If a thermal extension harness is present then the PCV is non-PCM controlled. Refer to POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM .
    • Check if the PCV heater is PCM controlled.
    • Is the PCV heater PCM controlled? 
    Yes No
    GO to  HG5. GO to  HG8.
  5. HG5 CHECK THE HARNESS VOLTAGE TO THE PCM CONTROLLED PCV HEATER 
    • Suspect PCV connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCVHF Connector, Harness Side ( - )
      IGN START/RUN - Pin 2 Ground
    • Measure the voltage between:
      ( + ) PCV Connector, Harness Side ( - )
      IGN START/RUN Ground
    • Is the voltage greater than 10 V? 
    Yes No
    GO to  HG6. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  6. HG6 CHECK THE HARNESS CIRCUIT TO THE PCM CONTROLLED PCV HEATER 
    • Key in OFF position.
    • PCM connector disconnected.
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) PCVHF Connector, Harness Side
      PCVHF PCVHF - Pin 1
    • Measure the resistance between:
      ( + ) PCM Connector, Harness Side ( - ) PCV Connector, Harness Side
      PCVHC PCVHC
    • Is the resistance greater than 5 ohms? 
    Yes No
    GO to  HG7. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  7. HG7 CHECK THE RESISTANCE OF THE PCM CONTROLLED PCV VALVE OR TUBE HEATER 
    • Measure the resistance between:
      ( + ) PCVHF Connector, Component Side ( - ) PCVHF Connector, Component Side
      IGN START/RUN - Pin 2 PCVHF - Pin 1
    • Measure the resistance between:
      ( + ) PCV Connector, Component Side ( - ) PCV Connector, Component Side
      IGN START/RUN PCVHC
    • Is the resistance between 10 - 35 ohms? 
    Yes No
    GO to  HG13. INSTALL a new PCV valve or tube. REFER to the appropriate ENGINE EMISSION CONTROL article.
    CLEAR the DTCs. REPEAT the self-test.
  8. HG8 CHECK THE VOLTAGE AND GROUND AT THE HARNESS ELECTRICALLY HEATED PCV VALVE OR TUBE NON-PCM CONTROLLED 
    • PCV connector disconnected.
    • PCVTE-Harness Side connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCVTE-Harness Side, Harness Side ( - ) PCVTE-Harness Side, Harness Side
      IGN START/RUN - Pin 1 GND - Pin 2
    • Is the voltage greater than 10 V? 
    Yes No
    For vehicles with a thermal extension harness, GO to  HG10.
    For all others, GO to  HG11.    		 GO to  HG9.
  9. HG9 CHECK THE VOLTAGE CIRCUIT 
    • PCV connector disconnected.
    • Key ON, engine OFF.
    • Measure the voltage between:
      ( + ) PCV Connector, Harness Side ( - )
      IGN START/RUN Ground
    • Is the voltage greater than 10 V? 
    Yes No
    REPAIR the open GND circuit. TEST the system for normal operation. REPAIR the open PWR circuit TEST the system for normal operation.
  10. HG10 VALVE RESISTANCE CHECK WITHOUT AN EXTENSION HARNESS 
    NOTE: On some applications the vehicle may be equipped with a thermal harness that only provides electrical continuity when the temperature is less than 5°C (40°F) +/- 4°C (+/- 7°F). Typically this harness is located close to the PCV valve or tube.
    • Disconnect the thermal extension harness from the PCV valve.
    • Measure the resistance between:
      ( + ) PCV Connector, Component Side ( - ) PCV Connector, Component Side
      IGN START/RUN PCVHC
    • Is the resistance between 10 - 35 ohms? 
    Yes No
    INSTALL a new thermal extension harness PCV. TEST the system for normal operation. INSTALL a new PCV.
  11. HG11 CHECK THE RESISTANCE OF THE ELECTRICALLY HEATED PCV VALVE OR TUBE 
    • Measure the resistance between:
      ( + ) PCV Connector, Component Side ( - ) PCV Connector, Component Side
      IGN START/RUN GND
    • Is the resistance between 10 - 35 ohms? 
    Yes No
    GO to  HG12. INSTALL a new PCV valve or tube. REFER to the appropriate ENGINE EMISSION CONTROL article.
  12. HG12 PCV SYSTEM CHECK 
    • Start the engine and warm it until engine temperature is stable.
    • Disconnect the closure (fresh air) hose from the remote air cleaner or air outlet tube (the tube connecting the mass air flow sensor and the throttle body).
    • Place a stiff piece of paper over the hose end. Wait 1 minute.
    • Does vacuum hold the paper in place? 
    Yes No
    The PCV system is OK.
    RETURN to the SYMPTOM CHARTS article, Symptom Charts for further direction.    		 CHECK for vacuum leaks/obstruction in the PCV system (such as oil cap, PCV valve, hoses, cut grommets, valve cover bolt torque/gasket leak). REFER to the vehicle emissions control information (VECI) label for PCV system components and routing. REPAIR as necessary.
  13. HG13 CHECK IF A CONCERN OR DTC IS STILL PRESENT 
    • Connect the PCV system.
    • Clear the DTCs.
    • Carry out the self-test.
    • Is the concern or DTC is still present? 
    Yes No
    GO to  HG14. Unable to duplicate or identify the concern at this time.
    RETURN to the SYMPTOM CHARTS article, Symptom Charts for further direction.
  14. HG14 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 and verify the concern is still present.
    • Is the concern still present? 
    Yes No
    INSTALL a new PCM. REFER toFLASH 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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