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Pinpoint Test B : Pinpoint Test

WARNING: This page is about a different variant/trim than selected.
  1. B1 CARRY OUT INSPECTION AND VERIFICATION

    Are any concerns present? 

    1. Yes: REPAIR as needed.
    2. No: GO to B2 
  2. B2 CHECK FOR AN AIRFLOW OBSTRUCTION
    • Check the radiator or A/C condenser for an external obstruction such as leaves or cardboard.

    Is an obstruction present? 

    1. Yes: REMOVE the obstruction.
    2. No: GO to B3 
  3. B3 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? 

    1. Yes: REPAIR or INSTALL new components.
    2. No: GO to B4 
  4. B4 CHECK THE ENGINE COOLANT FOR AN INTERNAL LEAK
    • Inspect the engine coolant in the coolant expansion tank for signs of engine oil.

    Is engine oil evident in the coolant? 

    1. Yes: REFER to: ENGINE ).
    2. No: GO to B5 
  5. B5 CHECK THE ENGINE OIL FOR COOLANT
    • Remove the oil level indicator from the engine.

    Is coolant evident in the oil? 

    1. Yes: REFER to: ENGINE ).
    2. No: GO to B6 
  6. B6 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? 

    1. Yes: REFER to: ENGINE .
    2. No: GO to B7 
  7. B7 CHECK COOLANT CONDITION
    • Check the coolant for dirt, rust or contamination and check the coolant concentration.

    Is the coolant condition OK? 

    1. Yes: GO to B8 
    2. No: FLUSH the engine cooling system.

      REFER to: Cooling System Draining and Vacuum Filling  .

  8. B8 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.
    1. Yes: GO to B9 
    2. No: DIAGNOSE the electric cooling fan operation. REFER to the ENGINE CONTROLS - SYMPTOM CHARTS (EXCEPT DIESEL & HYBRID) .
  9. B9 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? 

    1. Yes: GO to B10 
    2. No: INSTALL a new coolant pump.

      REFER to: Coolant Pump  .

  10. B10 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 lower radiator hose.

    Is the lower radiator hose hot? 

    1. Yes: CHECK the temperature gauge operation.

      REFER to: INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES .

    2. No: GO to B11 
  11. B11 VISUALLY INSPECT THE THERMOSTAT

    Is the thermostat damaged? 

    1. Yes: INSTALL a new thermostat.

      REFER to: Thermostat  .

    2. No: INSTALL a new thermostat.

      REFER to: Thermostat  .

      If the engine still overheats, INSTALL a new radiator. REFER to: Radiator  .

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