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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Engine Cooling System (Diesel)) >> Diagnosis And Testing >> Engine Cooling >> Inspection and Verification

Inspection and Verification

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
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.
NOTE: Always fill the cooling system with the manufacturer's specified coolant. If a non-specified coolant has been used the cooling system must be chemically flushed. Refer to COOLING SYSTEM FLUSHING - WITHOUT OIL CONTAMINATION . Failure to follow these instructions may damage the engine or cooling system.
  1. Verify the customer concern.
  2. Visually check the engine coolant level at the degas bottle when the system is cold.
  3. Make sure the pressure relief cap is installed correctly.
  4. Record any cooling system DTCs retrieved. Refer to the PCM DTC CHART  for DTC descriptions.
  5. NOTE: Take note of any coolant odor or steam coming from cooling system components.

    If the system coolant is filled correctly and no DTCs associated with fail-safe cooling are retrieved, verify the customer concern by operating the engine to duplicate the condition.

  6. NOTE: For the coolant flow diagrams, refer to ENGINE COOLING  in the Description and Operation portion.

    Visually inspect for obvious signs of mechanical or electrical damage.

    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Leaks or weeps at:
      • Hoses
      • Tubes
      • Clamp joints
      • Quick connect couplings
      • Gaskets
      • O-rings
      • Coolant outlet connector
      • Radiator
      • Pressure relief cap
      • Coolant pump
      • Heater core (wet floor or coolant odor in vehicle)
      • Coolant crossover manifold assembly
      • Oil cooler
      • Degas bottle
      • Cylinder block core plugs
      • Cylinder head core plugs
      • Block heater (if equipped)
      • EGR cooler
    • Inoperative or damaged:
      • Electronically actuated fan clutch
      • Electronically actuated fan clutch controller
      • Wiring or connectors
      • Engine Coolant Temperature (ECT) sensor - primary cooling system
      • Intake Air Temperature (IAT) sensor
      • Mass Air Flow (MAF) sensor
      • Vehicle Speed Sensor (VSS)
    • Cracked or damaged:
      • Hoses
      • Tubes
      • Hose clamps
      • Coolant outlet connector
      • Radiator
      • Pressure relief cap
      • Cooling fan
      • Fan clutch
      • Coolant pump
      • Degas bottle
      • Oil cooler
      • Coolant crossover manifold assembly
      • Cylinder block core plugs
      • Cylinder head core plugs
      • Block heater (if equipped)
      • EGR cooler
      • Radiator seals
      • Radiator air deflectors
      • Cooling fan stator
      • Cooling fan stator seals
    • Restricted airflow through the A/C condenser/radiator
    • Drive belt loose, worn or installed incorrectly
    • Broken or weak drive belt tensioner
    • Excessive white or light gray exhaust smoke (may have burnt coolant odor)
    • Coolant in engine oil
    • Engine oil in coolant
    		  
  7. If the inspection reveals an obvious concern that can be readily identified, repair it as necessary. Test the system for normal operation.
  8. Evaluate the coolant condition. For additional information, refer to COOLANT TEST .
  9. If an obvious cause for an observed or reported concern is found, correct the cause and test the system for normal operation before proceeding to the next step.
  10. NOTE: Make sure to use the latest scan tool software release.

    If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).

  11. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.

    If the scan tool does not communicate with the VCM:

    • check the VCM connection to the vehicle.
    • check the scan tool connection to the VCM.
    • refer to MODULE COMMUNICATIONS NETWORK , No Power To The Scan Tool, to diagnose no power to the scan tool.
  12. If the scan tool does not communicate with the vehicle:
    • verify the ignition key is in the ON position.
    • verify the scan tool operation with a known good vehicle.
    • refer to MODULE COMMUNICATIONS NETWORK to diagnose no response from the PCM.
  13. Carry out the network test.
    • If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK .
    • If the network test passes, retrieve and record Continuous Memory Diagnostic Trouble Codes (CMDTCs).
  14. Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.
  15. If the DTCs recovered are related to the concern, go to the PCM DTC CHART . For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
  16. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
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