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On-Vehicle Inspection [10/2015 - ]: Procedure

  1. INSPECT FOR COOLANT LEAK 
    WARNING:
    • When engine assembly and radiator assembly is hot, do not remove the reserve tank cap.
      GTY677766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Fluid and steam may spray out due to high pressure, possibly resulting in burns.
    1. Remove the reserve tank cap.
    2. Fill the radiator reserve tank assembly with engine coolant, and then install a radiator cap tester.
      GTY635537Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Radiator Cap Tester
    3. Warm up the engine.
    4. Pump the radiator cap tester to 123 kPa (1.3 kgf/cm2 , 18 psi), and then check that the pressure does not drop.
      • If the pressure drops, check the hoses, radiator assembly and engine water pump assembly for leaks.
      • If there are no signs of external engine coolant leaks, check the core sub-assembly, cylinder block sub-assembly and cylinder head sub-assembly.
    5. Remove the radiator cap tester.
    6. Install the reserve tank cap.
  2. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR 
    1. Check that the engine coolant level is between the low line and full line when the engine is cold.

      If the engine coolant level is low, check for leaks and add engine coolant to the full line.

      NOTE:

      Do not substitute plain water for engine coolant.

      GTY642556Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Full Line
      *b Low Line

      If the engine coolant level is low, perform engine coolant leak inspection, and fill new engine coolant.

  3. INSPECT ENGINE COOLANT QUALITY 
    WARNING:
    • When engine assembly and radiator assembly is hot, do not remove the reserve tank cap.
      GTY677766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Fluid and steam may spray out due to high pressure, possibly resulting in burns.
    1. Remove the reserve tank cap.
    2. Check that there are no excessive deposits of rust or scale around the reserve tank cap and water filler hole. Also, the engine coolant should be free of oil.

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

    3. Install the reserve tank cap.
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