COOLING SYSTEM ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT FOR COOLANT LEAK

    CAUTION:

    Do not remove the radiator cap or reservoir tank cap while the engine and radiator are still hot. Pressurized hot engine coolant and steam may be released and cause serious burns.

    Note

    Before performing each inspection, turn the A/C switch off.


    1. Remove the reservoir tank cap.

    2. Fill the radiator with coolant and attach a radiator cap tester.

    3. Put the engine in inspection mode Click here.

    4. Warm up the engine.

    5. Using a radiator cap tester, increase the pressure inside the radiator to 137 kPa (1.4 kgf/cm2, 20 psi), and check that the pressure does not drop.

      If the pressure drops, check the hoses, radiator and engine water pump for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.

  2. INSPECT ENGINE COOLANT LEVEL


    1. Check that the engine coolant level is between the "LOW" and "FULL" lines when the engine is cold.

      If the engine coolant level is low, check for leaks and add TOYOTA Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with long-life hybrid organic acid technology to the "FULL" line.

      Note

      Do not substitute plain water for engine coolant.

  3. INSPECT ENGINE COOLANT QUALITY

    CAUTION:

    Do not remove the radiator cap or reservoir tank cap while the engine and radiator are still hot. Pressurized hot engine coolant and steam may be released and cause serious burns.


    1. Remove the reservoir tank cap.

    2. Check if there are any excessive deposits of rust or scales around the reservoir tank cap and radiator filler hole. Also, the coolant should be free of oil.

      If excessively dirty, clean the coolant passage and replace the coolant.

    3. Install the reservoir tank cap.