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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 747 (Engine Controls - Pinpoint Tests - 6.0L Diesel (99P E-Series & 99P F450/550)) >> Pinpoint Test K: Engine Coolant Temperature (ECT) Sensor >> Test Procedure

Test Procedure

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  1. K1 PRELIMINARY DIAGNOSIS FOR DTCs P0117, P0118 
    • Perform the visual inspection.
    • Connect the scan tool.
    • Retrieve and record all DTCs.
    • Clear all DTCs.
    • Perform On-Demand Self Test.

    ARE DTCS P0117 OR P0118 PRESENT? 

    Yes No
    For DTC P0117, Go to  K2.
    For DTC P0118, Go to  K4.    		 Unable to duplicate condition. CHECK for loose connection, damaged or corroded pins. WIGGLE harness attempting to recreate the fault. REFER to SYMPTOM CHARTS - 6.0L DIESEL if a driveability concern exists.
  2. K2 DIAGNOSTIC TROUBLE CODE (DTC) P0117 
    • Possible causes:
      • ECT signal circuit ground short
      • ECT sensor
      • PCM
      • induce opposite DTC
    • Disconnect ECT harness connector.
    • Perform KOEO On-Demand Self Test.

    IS DTC P0118 PRESENT? 

    Yes No
    INSTALL a new ECT sensor. RESTORE the vehicle. CLEAR DTCs and RETEST the system. Go to  K3.
  3. K3 CHECK ECT SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    • Disconnect the PCM engine harness connector.
    • Measure the resistance between the ECT harness connector pin 2 and ground.

    IS THE RESISTANCE GREATER THAN 10,000 OHMS? 

    Yes No
    INSTALL a new PCM. RESTORE the vehicle. CLEAR DTCs and RETEST system. REPAIR short to ground in the ECT signal circuit. RESTORE the vehicle. CLEAR the DTCs and RETEST the system.
  4. K4 DIAGNOSTIC TROUBLE CODE (DTC) P0118 
    NOTE: Refer to the PCM and component connector pin numbers, Figure and Figure, at the beginning of this pinpoint test.
    • Possible causes:
      • short to voltage in the ECT signal circuit
      • open in signal return circuit
      • ECT sensor
      • PCM
    • Key off.
    • Disconnect the ECT electrical connector.
    • Measure the resistance between ECT electrical connector pin 1 and ground.

    IS THE RESISTANCE LESS THAN 5 OHMS? 

    Yes No
    Go to  K5. REPAIR open in ECT return circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  5. K5 INDUCE OPPOSITE FAILURE 
    • Key on, engine off.
    • Install a jumper between pins 1 and 2, of the ECT electrical connector.
    • Perform KOEO On-Demand Self Test.

    IS DTC P0117 PRESENT? 

    Yes No
    INSTALL a new ECT sensor. CLEAR DTCs and RETEST the system. Go to  K6.
  6. K6 CHECK ECT SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect the PCM engine harness electrical connector.
    • Measure the voltage on ECT electrical connector pin 2 and ground.

    IS THE VOLTAGE LESS THAN 0.2 VOLTS? 

    Yes No
    Go to  K7. REPAIR short to voltage in the ECT signal circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  7. K7 CHECK ECT SIGNAL CIRCUIT FOR AN OPEN 
    • Key off.
    • Measure the resistance between the PCM engine harness connector pin 32 and ECT harness connector pin 2.

    IS THE RESISTANCE LESS THAN 5 OHMS? 

    Yes No
    Go to  K8. REPAIR open in the ECT signal circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
  8. K8 CHECK ECT SIGNAL RETURN CIRCUIT FOR AN OPEN 
    • Measure the resistance between PCM engine harness connector pin 25 and ECT sensor harness connector pin 1.

    IS THE RESISTANCE LESS THAN 5 OHMS? 

    Yes No
    INSTALL a new PCM. RESTORE the vehicle. CLEAR DTCs and RETEST the system. REPAIR open in ECT signal return circuit. RESTORE the vehicle. CLEAR DTCs and RETEST the system.
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