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Home >> Ford >> 2018 >> Transit-350 Base, Van Cargo Extended, 3.5L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Cooling - 3.2L DURATORQ-TDCI (148KW/200PS) - Puma) >> Diagnosis And Testing >> Engine Cooling >> Pinpoint Tests >> Pinpoint Test B : The Engine Overheats

Pinpoint Test B : The Engine Overheats

WARNING: This page is about a different variant/trim than selected.
  1. Normal Operation and Fault Conditions 

    The engine cooling system maintains the engine temperature during operation. Correct coolant flow through the engine, radiator and remainder of cooling system passages and components is essential to maintaining a correct engine temperature.

    Engine coolant flows primarily from the engine to the radiator circuit and back to the coolant pump. Coolant is sent from the coolant pump through the engine block and cylinder head. A separate circuit from the engine also feeds the heater core with coolant. The coolant pump circulates the coolant. The coolant thermostat is a control valve actuated by coolant temperature. When the thermostat is closed, coolant flow bypasses the radiator circuit and returns to the coolant pump. When the thermostat is opened, coolant flows through the radiator circuit to transfer engine-generated heat to the outside air.

    Engine overheating generally occurs when there is a disruption in the ability to control either coolant flow at the correct rate, the inability to transfer heat from the engine through the coolant (including low coolant) or an inability to transfer engine-generated heat to the outside air through the radiator.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P0217:00 Engine Coolant Overtemperature Condition: No Sub Type Information Sets in the PCM when an engine overheat condition was sensed by the ECT sensor.

    Possible Sources 

    • Low coolant level
    • External engine coolant leak
    • Airlock in system
    • Pressure relief cap installation
    • Restricted airflow through A/C condenser/radiator
    • Coolant condition/concentration
    • Accessory drive components
    • Non-OEM engine enhancement components
    • Cooling fan
    • Internal engine coolant leak
    • Electric cooling fan
    • ECT sensor
    • Radiator
    • Thermostat
    • Coolant pump
    • Coolant flow restriction
    • Engine oil in engine coolant
    • Transmission fluid in engine coolant

  2. B1 CARRY OUT INSPECTION AND VERIFICATION

    Are any concerns present? 

    Yes  REPAIR as needed.
    No  GO to  B2

  3. B2 CHECK FOR PCM (POWERTRAIN CONTROL MODULE) DTCS

    • Ignition ON.

    • Using a scan tool, perform PCM self-test.

    Is DTC P0217 present? 

    Yes  GO to  B4
    No  Actual engine overheating has not been verified. CHECK the engine coolant temperature gauge operation. REFER to: Instrumentation, Message Center and Warning Chimes . If any other PCM DTCs are retrieved, REFER to: Electronic Engine Controls .

  4. B3 CHECK FOR NON-OEM ENGINE ENHANCEMENT COMPONENTS

    • Check the engine for any non-OEM components.

    Are there any non-OEM components on the engine? 

    Yes  ADVISE the customer the engine modifications may be causing the engine to overheat.
    No  GO to  B4

  5. B4 CHECK FOR AN AIRFLOW OBSTRUCTION AND MISSING AIR DEFLECTORS

    NOTE: Verify no vehicle front end damage is present.

    • Check the radiator or A/C condenser for an external obstruction such as leaves or cardboard and verify all air deflectors are present.

    Is an airflow obstruction present or air deflectors missing? 

    Yes  REPAIR as necessary.
    No  GO to  B5

  6. B5 CHECK THE ENGINE COOLANT LEVEL AND PRESSURE TEST THE COOLING SYSTEM

    • Ignition OFF.

    • Visually check the engine coolant level in the coolant expansion tank and adjust as necessary. Pressure test the cooling system.

    Does the engine cooling system leak externally? 

    Yes  REPAIR or INSTALL new components.
    No  GO to  B6

  7. B6 CHECK THE ENGINE COOLANT FOR AN INTERNAL LEAK

    • Inspect the engine coolant in the degas bottle for signs of engine oil or transmission fluid.

    Is engine oil or transmission fluid evident in the coolant? 

    Yes  If engine oil is evident, REFER to: Engine . If transmission fluid is evident, INSTALL a new transmission fluid cooler. REFER to: Transmission Fluid Cooler . REPAIR the transmission as necessary. REFER to: Diagnosis By Symptom .
    No  GO to  B7

  8. B7 CHECK THE ENGINE OIL AND TRANSMISSION FLUID FOR COOLANT

    • Remove the oil level indicator from the engine and the transmission.

    Is coolant evident in the engine oil or transmission fluid? 

    Yes  If coolant is in the engine oil, REFER to: Engine . If coolant is in the transmission fluid, INSTALL a new transmission fluid cooler. REFER to: Transmission Fluid Cooler . REPAIR the transmission as necessary. REFER to: Diagnosis By Symptom .
    No  GO to  B8

  9. B8 CHECK THE COOLING SYSTEM FOR COMBUSTION GASES

    NOTE: Use UView® Combustion Leak Tester part number UVU560000-R or equivalent.

    • Using a cooling system combustion gas leak tester, following the instructions supplied with the tester, check the coolant for combustion gases.

    Are combustion gases present? 

    Yes  REFER to: Engine .
    No  GO to  B9

  10. B9 CHECK THE COOLING FAN CLUTCH OPERATION

    • Start the engine.

    Is the cooling fan clutch operation OK? 

    Yes  GO to  B10
    No  INSTALL a new cooling fan. REFER to: Cooling Fan .

  11. B10 CHECK THE ELECTRIC COOLING FAN OPERATION

    • Start the engine.

    • Place the climate control function selector in the MAX A/C position and the blower motor switch in the HI position.

    Did the electric cooling fan operate? 

    Yes  GO to  B11
    No  DIAGNOSE the electric cooling fan operation. Refer to Engine Controls - Symptom Charts (Diesel) .

  12. B11 CHECK THE COOLANT PUMP OPERATION

    • Start the engine.

    • Allow the engine to run for 30 minutes. Place the climate control function selector in the MAX HEAT position. Feel the heater outlet hose.

    Is the heater outlet hose hot? 

    Yes  GO to  B12
    No  INSTALL a new coolant pump. REFER to: Coolant Pump .

  13. B12 CHECK THE THERMOSTAT OPERATION

    • Start the engine.

    • Allow the engine to run for 30 minutes. Place the climate control function selector in the MAX HEAT position. Feel the upper radiator hose.

    Is the upper radiator hose hot? 

    Yes  CHECK the temperature gauge operation. REFER to: Instrumentation, Message Center and Warning Chimes .
    No  GO to  B13

  14. B13 VISUALLY INSPECT THE THERMOSTAT

    • Carry out the Thermostat Visual Inspection. Refer to Thermostat .

    Is the thermostat damaged? 

    Yes  INSTALL a new thermostat. REFER to: Thermostat .
    No  INSTALL a new thermostat. REFER to: Thermostat . If the engine still overheats, INSTALL a new radiator. REFER to: Radiator .
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