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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2766 (Engine Controls - Pinpoint Test A: No Start Through Pinpoint Test DJ: Air Conditioner Evaporator Temperature (ACET) Sensor - CNG, Flex-Fuel & Gasoline) >> Pinpoint Test DG: Knock sensor >> Test Procedure

Test Procedure

WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2004 Mercury Sable, 2004 Mercury Mountaineer, 2004 Mercury Monterey, 2004 Mercury Marauder, and 2004 Mercury Grand Marquis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Proceed to DTC testing steps listed in FAULT CODE SETTING CONDITION  table of fault code setting condition.
FAULT CODE SETTING CONDITION

Fault Code KOEO KOER Continuous Memory
P0325  DG1  DG1  DG1
P0326  DG1  DG1  DG1
P0330  DG1  DG1  DG1
P0331  DG1  DG1  DG1
  1. DG1 KOER AND CONTINUOUS MEMORY DTCS P0325 AND P0326: CHECK THE RESISTANCE OF KS1 
    • Verify the KS is connected and properly installed.
    • KS connector disconnected.
    • Measure the resistance between:
    ( + )KS Connector, Component Side ( - )KS Connector, Component Side
    KS1- KS1+

    Is the resistance between 4.39M ohms - 5.35M ohms? 

    Yes No
    KEY OFF.
    GO to  DG3.    		 INSTALL a new KS.
  2. DG2 KOER AND CONTINUOUS MEMORY DTCS P0330 AND P0331: CHECK THE RESISTANCE OF KS2 
    • Verify the KS is connected and properly installed.
    • KS connector disconnected.
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Component Side ( - )KS2 Sensor Connector, Component Side
    KS2- KS2+

    Is the resistance between 4.39M ohms - 5.35M ohms? 

    Yes No
    KEY OFF.
    GO to  DG4.    		 INSTALL a new KS2 sensor.
  3. DG3 CHECK THE KS1+ CIRCUIT FOR AN OPEN IN THE HARNESS 
    • PCM connector disconnected.
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )PCM Connector, Harness Side
    KS1+ KS1+

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG5. REPAIR open circuit.
  4. DG4 CHECK THE KS2+ CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )PCM Connector, Harness Side
    KS2+ KS2+

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG6. REPAIR open circuit.
  5. DG5 CHECK THE KS1- CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )PCM Connector, Harness Side
    KS1- KS1-

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG7. REPAIR open circuit.
  6. DG6 CHECK THE KS2- CIRCUIT FOR AN OPEN IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )PCM Connector, Harness Side
    KS2- KS2-

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG8. REPAIR open circuit.
  7. DG7 CHECK THE KS1+ CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS Connector, Component Side ( - )Vehicle battery
    KS1+ Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DG9. REPAIR short circuit to GND.
  8. DG8 CHECK THE KS2+ CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Component Side ( - )Vehicle battery
    KS2+ Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DG10. REPAIR short circuit to GND.
  9. DG9 CHECK THE KS1- CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )Vehicle battery
    KS1- Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DG11. REPAIR short circuit to GND.
  10. DG10 CHECK THE KS2- CIRCUIT FOR A SHORT TO GROUND IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )Vehicle battery
    KS2- Negative terminal

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  DG12. REPAIR short circuit to GND.
  11. DG11 CHECK THE KS1+ CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )PCM Connector, Harness Side
    KS1+ VPWR
    KS1+ VREF

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  DG13. REPAIR short circuit to PWR.
  12. DG12 CHECK THE KS2+ CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • l Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )PCM Connector, Harness Side
    KS2+ VREF
    KS2+ VPWR

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  DG14. REPAIR short circuit to PWR.
  13. DG13 CHECK THE KS1- CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )PCM Connector, Harness Side
    KS1- VREF
    KS1- VPWR

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  DG15. REPAIR short circuit to PWR.
  14. DG14 CHECK THE KS2- CIRCUIT FOR A SHORT TO POWER IN THE HARNESS 
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )PCM Connector, Harness Side
    KS2- VREF
    KS2- VPWR

    Are the resistances greater than 10K ohms? 

    Yes No
    GO to  DG16. REPAIR short circuit to PWR.
  15. DG15 CHECK THE KS1- CIRCUIT FOR INTERMITTENT FAULTS 
    NOTE: Carefully wiggle all accessible wiring and connectors associated with the KS circuit.
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )PCM Connector, Harness Side
    KS1- KS1-

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG17. REPAIR open circuit.
  16. DG16 CHECK THE KS2- CIRCUIT FOR INTERMITTENT FAULTS 
    NOTE: Carefully wiggle all accessible wiring and connectors associated with the KS circuit.
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )PCM Connector, Harness Side
    KS2- KS2-

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG18. REPAIR open circuit.
  17. DG17 CHECK THE KS1+ CIRCUIT FOR INTERMITTENT FAULTS 
    NOTE: Carefully wiggle all accessible wiring and connectors associated with the KS circuit.
    • Measure the resistance between:
    ( + )KS Connector, Harness Side ( - )PCM Connector, Harness Side
    KS1+ KS1+

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG19. REPAIR open circuit.
  18. DG18 CHECK THE KS2+ CIRCUIT FOR INTERMITTENT FAULTS 
    NOTE: Carefully wiggle all accessible wiring and connectors associated with the KS circuit.
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Harness Side ( - )PCM Connector, Harness Side
    KS2+ KS2+

    Is the resistance less than 5 ohms? 

    Yes No
    GO to  DG20. REPAIR open circuit.
  19. DG19 CHECK THE PCM INTERNAL RESISTANCE OF THE CIRCUIT FOR KS1 
    NOTE: The following measurement is intended to check the PCM internal resistance.
    • Measure the resistance between:
    ( + )KS Connector, Component Side ( - )KS Connector, Component Side
    KS1+ KS1-

    Is the resistance greater than 10K ohms? 

    Yes No
    INSTALL a new KS. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .
  20. DG20 CHECK THE PCM INTERNAL RESISTANCE OF THE CIRCUIT FOR KS2 
    NOTE: The following measurement is intended to check the PCM internal resistance.
    • Measure the resistance between:
    ( + )KS2 Sensor Connector, Component Side ( - )KS2 Sensor Connector, Component Side
    KS2+ KS2-

    Is the resistance greater than 10K ohms? 

    Yes No
    INSTALL a new KS2 sensor. INSTALL a new PCM. REFER to FLASH ELECTRICALLY ERASEABLE PROGRAMMABLE READ ONLY MEMORY - FLASH EEPROM .
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