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Home >> Ford >> 2016 >> Transit-150 Base, 3.2L Eng VIN V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Pinpoint Tests (Diesel) >> Pinpoint Tests K: Engine Coolant Temperature (ECT) Sensor >> Test Procedure
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Test Procedure

  1. K1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 

    Are DTCs P0115, P0116, P0117, P0118, P0128, P1116, P2182, P2183, P2184, or P2185 present? 

    Yes No
    GO to  K2. RETURN to SYMPTOM CHARTS for further direction.
  2. K2 CHECK THE ENGINE COOLANT LEVEL 
    WARNING: ALWAYS ALLOW THE ENGINE TO COOL BEFORE OPENING THE COOLING SYSTEM. DO NOT UNSCREW THE COOLANT PRESSURE RELIEF CAP WHEN THE ENGINE IS OPERATING OR THE COOLING SYSTEM IS HOT. THE COOLING SYSTEM IS UNDER PRESSURE; STEAM AND HOT LIQUID CAN COME OUT FORCEFULLY WHEN THE CAP IS LOOSENED SLIGHTLY. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY.
    • Check the engine coolant and the secondary cooling system levels.

    Is the coolant fill level correct? 

    Yes No
    GO to  K3. REFER to the Service Information, Engine Cooling, Diagnosis and Testing to continue diagnosis.
    Clear the PCM DTCs. REPEAT the self-test.
  3. K3 CHECK THE RESISTANCE OF THE ECT OR THE ECT2 SENSORS WITH THE ENGINE OFF 
    NOTE: Verify the engine temperature is at ambient room temperature before continuing with this test. A soak period of 8 hours may be required. Refer to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS for information concerning DTC P0115, P0116, P1116 or P2183.
    NOTE: Refer to the chart at the beginning of this test for the resistance specifications.
    • Ignition OFF.
    • For DTC's P2182, P2183, P2184, or P2185,
    • ECT2 Sensor connector disconnected.
    • Measure the resistance between:
      (+) ECT2 Sensor Connector, Component Side (-) ECT2 Sensor Connector, Component Side
      ECT2 - Pin 1 SIGRTN - Pin 2
    • For all others,
    • ECT Sensor connector disconnected.
    • Measure the resistance between:
      (+) ECT Sensor Connector, Component Side (-) ECT Sensor Connector, Component Side
      ECT - Pin 1 SIGRTN - Pin 2

    Is the resistance within specification? 

    Yes No
    GO to  K4. INSTALL a new ECT or secondary cooling system ECT2 sensor. REFER to the Service Information, Electronic Engine Controls.
    Clear the PCM DTCs. REPEAT the self-test.
  4. K4 CHECK FOR AN OPEN 
    • Ignition OFF.
    • PCM-E connector disconnected.
    • For DTC's P2182, P2183, P2184, or P2185,
    • Measure the resistance between:
      (+) PCM-E Connector, Harness Side (-) ECT2 Sensor Connector, Harness Side
      ECT2 ECT2 - Pin 1
      SIGRTN SIGRTN - Pin 2
    • For all others,
    • Measure the resistance between:
      (+) PCM-E Connector, Harness Side (-) ECT Sensor Connector, Harness Side
      ECT ECT - Pin 1
      SIGRTN SIGRTN - Pin 2

    Is the resistance less then 5 ohms? 

    Yes No
    GO to  K5. REPAIR the open circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  5. K5 CHECK FOR A SHORT TO GROUND 
    • For DTC's P2182, P2183, P2184, or P2185,
    • Measure the resistance between:
      (+) ECT2 Sensor Connector, Harness Side (-)
      ECT2 - Pin 1 Ground
    • For all others,
    • Measure the resistance between:
      (+) ECT Sensor Connector, Harness Side (-)
      ECT - Pin 1 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to  K6. REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.
  6. K6 CHECK THE SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • For DTC's P2182, P2183, P2184, or P2185,
    • Measure the voltage between:
      (+) ECT2 Sensor Connector, Harness Side (-)
      ECT2 - Pin 1 Ground
    • For all others,
    • Measure the voltage between:
      (+) ECT Sensor Connector, Harness Side (-)
      ECT - Pin 1 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the PCM DTCs.
    REPEAT the self-test.    		 GO to  K7.
  7. K7 CHECK THE RESISTANCE OF THE ECT OR SECONDARY COOLING SYSTEM ECT2 SENSORS 
    NOTE: Refer to the chart at the beginning of this test for the resistance specifications.
    NOTE: Verify the engine is at operating temperature before taking the ECT or ECT2 reading.
    • For DTC's P2182, P2183, P2184, or P2185,
    • ECT2 Sensor connector connected.
    • Run the engine until the engine temperature stabilizes.
    • Ignition OFF.
    • ECT2 Sensor connector disconnected.
    • Measure the resistance between:
      (+) ECT2 Sensor Connector, Component Side (-) ECT2 Sensor Connector, Component Side
      ECT2 - Pin 1 SIGRTN - Pin 2
    • For all others,
    • ECT Sensor connector connected.
    • Run the engine until the engine temperature stabilizes.
    • Ignition OFF.
    • ECT Sensor connector disconnected.
    • Measure the resistance between:
      (+) ECT Sensor Connector, Component Side (-) ECT Sensor Connector, Component Side
      ECT - Pin 1 SIGRTN - Pin 2

    Is the resistance within specification? 

    Yes No
    For DTCs P0116 and P0128, GO to  K8.
    For DTCs P2182 and P2183. GO to  K9.
    For all others, The system is operating correctly at this time.
    RETURN to SYMPTOM CHARTS for further direction.    		 INSTALL a new ECT sensor.
    REFER to the Service Information, Electronic Engine Controls.
    Clear the PCM DTCs. REPEAT the self-test.
  8. K8 CHECK THE SENSOR OPERATION 
    • Run the engine until the engine temperature stabilizes.
    • Verify the radiator hoses are hot and the cooling system is pressurized.
    • For F-650/F-750 and Transit,
    • Access the PCM and monitor the ECT (TEMP) PID.
    • For all others,
    • Access the PCM and monitor the ECT1 (TEMP) PID.

    Is the temperature greater than 77°C (170.6°F)? 

    Yes No
    The test is complete.
    DISREGARD the current diagnostic trouble code (DTC) at this time. DIAGNOSE the next DTC. GO to DIAGNOSTIC TROUBLE CODE (DTC) CHARTS AND DESCRIPTIONS .    		 REFER to the Service Information, Engine Cooling to diagnose why the engine does not reach operating temperature.
    REPAIR as necessary.
    Clear the PCM DTCs. REPEAT the self-test.
  9. K9 TEMPERATURE SENSOR CORRELATION 
    NOTE: Verify the engine temperature is at ambient room temperature before continuing with this test. A soak period of 8 hours may be required.
    • Ignition ON, engine OFF.
    • Access the PCM and monitor the AAT (TEMP), CAC_T (TEMP), IAT11 (TEMP), EGRTC (TEMP) and ECT2_1 (TEMP) PIDs.
    • The secondary cooling system ECT2 temperature must be within the following ranges:
      • Within 20°C (36°F) degrees of the AAT reading
      • Within 20°C (36°F) degrees of the CAC_T reading
      • Within 20°C (36°F) degrees of the EGRTC reading
      • Within 20°C (36°F) degrees of the IAT11 reading

    Is the ECT2 PID within specification? 

    Yes No
    Unable to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the concern. REPAIR as necessary. INSTALL a new secondary engine coolant temperature ECT2 sensor.
    REFER to the Service Information, Electronic Engine Controls.
    Clear the PCM DTCs. REPEAT the self-test.
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