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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 98 (Secondary Engine Cooling System (Diesel)) >> Diagnosis And Testing >> Powertrain Secondary Cooling System >> 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: The secondary cooling system is filled with Motorcraft® Orange Antifreeze/Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of Motorcraft® Orange Antifreeze/Coolant.
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 FUEL OR TRANSMISSION FLUID CONTAMINATION . Failure to follow these instructions may damage the engine or cooling system.
NOTE: During normal vehicle operation, Motorcraft Orange Antifreeze/Coolant may change color from orange to pink or light red. As long as the engine coolant is clear and uncontaminated, this color change does not indicate the engine coolant has degraded nor does it require the engine coolant to be drained, the system to be flushed, or the engine coolant to be replaced.
  1. Verify the customer concern.
  2. Visually check the 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 secondary cooling are retrieved, verify the customer concern by operating the engine to duplicate the condition.

  6. NOTE: Refer to the coolant flow diagram in the Description and Operation, Powertrain Secondary Cooling System .

    Inspect to determine if any of the following mechanical or electrical concerns apply.

    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Leaks or weeps at:
      • Hoses
      • Tubes
      • Clamp joints
      • Quick connect couplings
      • Gaskets
      • O-rings
      • Thermostat housing
      • Radiator
      • Pressure relief cap
      • Coolant pump
      • Degas bottle
      • EGR cooler
      • Transmission fluid cooler
      • CAC
      • Fuel cooler
    • Cracked or damaged:
      • Hoses
      • Tubes
      • Hose clamps
      • Quick connect couplings
      • Thermostat housing
      • Radiator
      • Pressure relief cap
      • Coolant pump
      • Degas bottle
      • CAC
      • Transmission fluid cooler
      • EGR cooler
      • Fuel cooler
    • Inoperative or damaged:
      • Engine Coolant Temperature (ECT) sensor - secondary cooling system ECT2
      • Charge Air Cooler Temperature (CACT) sensor
  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. 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 PCM DTCs, refer to ELECTRONIC ENGINE CONTROLS - DIESEL ENGINES .
  16. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
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