COOLING SYSTEM ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

Do not remove the water filler cap sub-assembly while the engine and radiator are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.

PROCEDURE


  1. INSPECT FOR COOLANT LEAK (for Engine)

    Note

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


    1. A01V01K

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

    2. Put the engine in inspection mode Click here.

    3. Warm up the engine.

    4. Using a radiator cap tester, increase the pressure inside the radiator to 108 kPa (1.1 kgf/cm2, 16 psi), and check that the pressure does not drop.

      If the pressure drops, check the hoses, radiator, engine water pump, front exhaust pipe assembly and engine coolant temperature sensor for leaks. If no external leaks are found, check the heater core, cylinder block and cylinder head.

  2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR (for Engine)


    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" 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 (for Engine)


    1. Remove the water filler cap sub-assembly.

    2. Check if there are any excessive deposits of rust or scale around the water filler cap sub-assembly and water filler hole. Also, the coolant should be free of oil.

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

    3. Install the water filler cap sub-assembly.