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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1777 (Engine Controls - Pinpoint Test Hf: Catalyst Efficiency Monitor And Exhaust Systems Through Pinpoint Test JC: Secondary Ignition (Coil Pack) - (Except Diesel & Hybrid)) >> Pinpoint Test HK: Variable Camshaft Timing (VCT) >> Test Procedure

Test Procedure

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  1. HK1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 
    NOTE: These DTCs may be accompanied by other DTCs. Diagnose all camshaft position (CMP) sensor DTCs first. If no CMP sensor related DTCs are present, continue to follow diagnosis for the DTC. If any CMP DTCs are present, GO to PINPOINT TEST DR . If no CMP DTCs are present, continue to follow this test.

    Are DTCs P0010, P0011, P0012, P0016, P0018, P0020, P0021, P0022, P052A, P052B, P052C or P052D present? 

    Yes No
    For DTCs P0010 or P0020, GO to  HK2.
    For all others, GO to  HK16.    		 For symptoms without DTCs, GO to  HK16.
    For all others, GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .
  2. HK2 DTCS P0010 OR P0020: CHECK FOR VCT DTCS 
    NOTE: The engine should be at operating temperature before running the self-test.
    • Clear the DTCs.
    • Carry out the KOER self-test.

    Are DTCs P0010 or P0020 present? 

    Yes No
    For KOER DTC P0010, GO to  HK4.
    For KOER DTC P0020, GO to  HK10.    		 GO to  HK3.
  3. HK3 CARRY OUT A THOROUGH WIGGLE TEST ON THE VCT HARNESS 
    • Carry out a thorough wiggle test on the VCT harness.
    • Carry out the KOER self-test.

    Are DTCs P0010 or P0020 present? 

    Yes No
    For KOER DTC P0010, GO to  HK4.
    For KOER DTC P0020, GO to  HK10.    		 GO to PINPOINT TEST Z .
  4. HK4 CHECK THE VCT1 SOLENOID RESISTANCE 
    • Ignition OFF.
    • VCT1 Solenoid connector disconnected.
    • Measure the resistance between:
      (+) VCT1 Solenoid Connector, Component Side (-) VCT1 Solenoid Connector, Component Side
      VCT1 VPWR

    Is the resistance between 5 - 14 ohms? 

    Yes No
    GO to  HK5. INSTALL a new VCT1 solenoid. REFER to the appropriate Electronic Engine Controls article .
    CLEAR the DTCs. REPEAT the self-test.
  5. HK5 CHECK THE VCT1 SOLENOID FOR INTERNAL SHORTS 
    • Measure the resistance between:
      (+) VCT1 Solenoid Connector, Component Side (-)
      VCT1 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  HK6. INSTALL a new VCT1 solenoid. REFER to the appropriate Electronic Engine Controls article .
    CLEAR the DTCs. REPEAT the self-test.
  6. HK6 CHECK THE VPWR CIRCUIT FOR AN OPEN 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) VCT1 Solenoid Connector, Harness Side (-)
      VPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  HK7. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  7. HK7 CHECK THE VCT1 CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) VCT1 Solenoid Connector, Harness Side (-)
      VCT1 Ground

    Is the voltage less than 1 V? 

    Yes No
    GO to  HK8. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  8. HK8 CHECK THE VCT1 CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between:
      (+) VCT1 Solenoid Connector, Harness Side (-) PCM Connector, Harness Side
      VCT1 VCT1

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  HK9. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  9. HK9 CHECK THE VCT1 CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) VCT1 Solenoid Connector, Harness Side (-)
      VCT1 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  HK18. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  10. HK10 DTC P0020: CHECK THE VCT2 SOLENOID RESISTANCE 
    • Ignition OFF.
    • VCT2 Solenoid connector disconnected.
    • Measure the resistance between:
      (+) VCT2 Solenoid Connector, Component Side (-) VCT2 Solenoid Connector, Component Side
      VCT2 VPWR

    Is the resistance between 5 - 14 ohms? 

    Yes No
    GO to  HK11. INSTALL a new VCT2 solenoid. REFER to the appropriate Electronic Engine Controls article .
    CLEAR the DTCs. REPEAT the self-test.
  11. HK11 CHECK THE VCT2 SOLENOID FOR INTERNAL SHORTS 
    • Measure the resistance between:
      (+) VCT2 Solenoid Connector, Component Side (-)
      VCT2 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  HK12. INSTALL a new VCT2 solenoid. REFER to the appropriate Electronic Engine Controls article .
    CLEAR the DTCs. REPEAT the self-test.
  12. HK12 CHECK THE VPWR CIRCUIT FOR AN OPEN 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) VCT2 Solenoid Connector, Harness Side (-)
      VPWR Ground

    Is the voltage greater than 10 V? 

    Yes No
    GO to  HK13. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  13. HK13 CHECK THE VCT2 CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • PCM connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) VCT2 Solenoid Connector, Harness Side (-)
      VCT2 Ground

    Is the voltage less than 1 V? 

    Yes No
    GO to  HK14. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  14. HK14 CHECK THE VCT2 CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between:
      (+) VCT2 Solenoid Connector, Harness Side (-) PCM Connector, Harness Side
      VCT2 VCT2

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  HK15. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
  15. HK15 CHECK THE VCT2 CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) VCT2 Solenoid Connector, Harness Side (-)
      VCT2 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  HK18. REPAIR the short circuit. CLEAR the DTCs. REPEAT the self-test.
  16. HK16 CONTINUOUS DTCS P0011, P0012, P0016, P0018, P0021, P0022, P052A, P052B, P052C OR P052D: CHECK THE OPERATION OF THE VCT SYSTEM 
    NOTE: Some vehicles require higher RPMs and loads to actuate the VCT system than others. The VCTADVERR PID should be close to zero whether actuating or not. During rapid VCT movements, the VCTADVERR PID may momentarily deviate from zero.
    NOTE: For a symptom based concern, monitor all applicable PIDs during this step.
    • For DTCs P0011, P0012, P0016, P052A or P052B,
    • Access the PCM and monitor the VCTADV and VCTADVERR PIDs.
    • For DTCs P0018, P0021, P0022, P052C or P052D.
    • Access the PCM and monitor the VCTADV2 and VCTADVERR2 PIDs.
    • Drive the vehicle while exercising the throttle to generate VCT movement.

    Does the VCTADV PID indicate VCT movement while the VCTADVERR PID maintain close to zero? 

    Yes No
    Unable to duplicate or identify the concern at this time. GO to  HK17.
  17. HK17 CHECK THE BASE ENGINE OIL PRESSURE 
    • Check the base engine oil pressure. Refer to the appropriate Engine System article, Oil Pressure Test .

    Are any concerns present? 

    Yes No
    REPAIR as necessary.
    CLEAR the DTCs. REPEAT the self-test.    		 INSTALL a new VCT solenoid. REFER to the appropriate Electronic Engine Controls article .
    CLEAR the DTCs. REPEAT the self-test.
  18. HK18 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 to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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