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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 204 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P F450/550)) >> Pinpoint Test O: Water in Fuel (WIF) Sensor >> Test Procedure

Test Procedure

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  1. O1 PRELIMINARY DIAGNOSIS FOR DIAGNOSTIC TROUBLE CODE (DTC) P2269 
    • Carry out a visual inspection.
    • Retrieve and record all DTCs.
    • Clear the DTCs.
    • Carry out the KOEO and KOER self-test.
    • Key ON, engine running.
    • Monitor the Water In Fuel indicator for 5 minutes.

    Is DTC P2269 present or is the water in fuel indicator illuminated? 

    Yes No
    GO to  O2. UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the fault. REPAIR as necessary. REFER to SYMPTOM CHARTS - 6.0L DIESEL , if a driveability concern exists.
  2. O2 CHECK FOR WATER OR CONTAMINANTS IN THE FUEL 
    NOTE: If the PCM detects water for greater than 4 minutes, continuous DTC P2269 is set and the PCM sends a message to the instrument cluster to illuminate the WATER IN FUEL indicator.
    NOTE: The fuel sample should fill the 0.95 L (1 quart) clear container half full. Flow out of the fuel drain should be a steady stream. Insufficient flow may indicate a fuel drain restriction or contaminants blocking the fuel drain. Repair as necessary.
    NOTE: Inspect the fuel sample in the clear container. The fuel sample should be clear, not cloudy. Some water and contaminants may be present in the fuel sample if the fuel filter has not been replaced recently. If water in the fuel is present, the water will separate from the fuel and condense in the bottom of the clear container. Contaminants may appear in the form of sludge, dirt or metallic corrosion particles in the fuel sample. If the fuel sample is cloudy, the fuel is aerated or emulsified with water. If the fuel sample is aerated. Carry out FUEL AERATION TEST . If the fuel sample is emulsified, replace the fuel filters.
    • Remove the fuel conditioning module drain plug and fill the clear container until it is half full.
    • Install the drain plug.
    • Inspect the fuel sample for water or contaminants.

    Is water or contaminants present in the fuel sample in the clear container? 

    Yes No
    GO to  O3. GO to  O4.
  3. O3 CHECK 2 ADDITIONAL FUEL SAMPLES FOR WATER IN THE FUEL 
    NOTE: Checking 2 additional fuel samples for water will determine if the fuel system has water contamination in the fuel tank.
    • Start the engine.
    • Key in OFF position.
    • Remove the fuel conditioning module drain plug and fill the clear container until it is half full.
    • Install the drain plug.
    • Start the engine.
    • Key in OFF position.
    • Remove the fuel conditioning module drain plug and fill the clear container until it is half full.
    • Install the drain plug.
    • Inspect the fuel sample for water.

    Is water present in the final fuel sample in the clear container? 

    Yes No
    FLUSH and CLEAN the fuel tank and fuel system. GO to  O7. GO to  O4.
  4. O4 CHECK THE WATER IN FUEL (WIF) SENSOR 
    • WIF Sensor connector disconnected.
    • Measure the resistance between the WIF sensor connector, pin 1, component side and the WIF sensor connector, pin 2, component side.

    Is the resistance greater than 10,000 ohms? 

    Yes No
    GO to  O5. GO to  O6.
  5. O5 CHECK FOR A SHORT TO GROUND IN THE SIGNAL CIRCUIT 
    • PCM connector disconnected.
    • Measure the resistance between the WIF sensor connector, pin 1, harness side and ground.

    Is the resistance greater than 10,000 ohms? 

    Yes No
    GO to  O7. REPAIR the short circuit. GO to  O7.
  6. O6 CHECK THE WIF SENSOR FOR CONTAMINATION 
    NOTE: Any contamination or metallic particles on the WIF sensor pins may cause a short between the pins.
    • Remove the fuel conditioning module manifold.
    • Check the WIF sensor pins and the fuel conditioning module manifold and reservoir for contamination.
    • Clean the WIF sensor pins and the fuel conditioning module manifold and reservoir as necessary.
    • Measure the resistance between the WIF sensor connector, pin 1, component side and the WIF sensor connector, pin 2, component side.

    Is the resistance greater than 10,000 ohms? 

    Yes No
    INSTALL the fuel conditioning module manifold. GO to  O7. INSTALL a new WIF sensor and fuel conditioning module manifold assembly. REFER to FUEL TANK AND LINES . GO to  O7.
  7. O7 CHECK THE WATER IN FUEL INDICATOR FOR CORRECT OPERATION 
    NOTE: To check the correct operation of the Water In Fuel indicator, a period of time greater than 4 minutes is required for the PCM to complete the diagnostic routine.
    • PCM connector connected.
    • WIF Sensor connector connected.
    • Clear the DTCs.
    • Key in OFF position.
    • Key ON, engine running.
    • Monitor the Water In Fuel indicator for 5 minutes.

    Does the Water In Fuel indicator illuminate briefly at key ON and then remain off? 

    Yes No
    The system is operating correctly at this time. REFER to INSTRUMENT CLUSTER and CARRY OUT the Instrument Cluster Self-Diagnostic Mode test to diagnose the Water In Fuel indicator.
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