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On-Vehicle Inspection [10/2017 - ]: Procedure

  1. INSPECT ENGINE COOLANT LEVEL IN RESERVOIR TANK 
    1. Check that the engine coolant level is between the L line and F line when the engine is cold.

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

      NOTE:

      Do not substitute plain water for engine coolant.

      GTY795393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a F Line
      *b L Line
    2. Remove the radiator cap sub-assembly and check that there is coolant up to the coolant filler hole.
    3. Install the radiator cap sub-assembly.
      NOTE:

      When installing the radiator cap sub-assembly, apply coolant to the O-ring of the radiator cap sub-assembly.

  2. INSPECT ENGINE COOLANT QUALITY 
    WARNING:

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

    1. Remove the clip.
      GTY824325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Detach the claw and remove the service hole cover from the lower radiator air deflector.
    3. Remove the reserve tank cap.
    4. Check if there are any 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, replace the engine coolant.

    5. Install the reserve tank cap.
    6. Attach the claw to install the service hole cover to the lower radiator air deflector.
    7. Install the clip.
  3. INSPECT FOR COOLANT LEAK 
    WARNING:

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

    1. Remove the upper radiator support seal.

      Refer to PROCEDURE - Step 2 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 2 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 2 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 2 [10/2023 - ]

    2. Remove the radiator cover plate.

      Refer to PROCEDURE - Step 1 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 1 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 1 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 1 [10/2023 - ]

    3. Remove the lower radiator air deflector.

      Refer to PROCEDURE - Step 3 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 3 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 3 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 3 [10/2023 - ]

    4. Remove the reserve tank cap.
    5. Fill the radiator assembly with engine coolant, and then install a radiator cap tester.
      GTY817178Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Radiator Cap Tester
    6. Put the engine in inspection mode (2WD for measuring exhaust gas).

      Refer to INSPECTION MODE PROCEDURE [10/2017 - ]

    7. Warm up the engine.
    8. 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 heater core, cylinder block sub-assembly and cylinder head sub-assembly.
    9. Remove the radiator cap tester.
    10. Install the reserve tank cap.
    11. Install the lower radiator air deflector.

      Refer to PROCEDURE - Step 8 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 8 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 8 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 8 [10/2023 - ]

    12. Install the upper radiator support seal.

      Refer to PROCEDURE - Step 9 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 9 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 9 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 9 [10/2023 - ]

    13. Install the radiator cover plate.

      Refer to PROCEDURE - Step 10 [10/2017 - 10/2020] , or refer to PROCEDURE - Step 10 [10/2020 - 11/2021] , or refer to PROCEDURE - Step 10 [11/2021 - 10/2023] , or refer to PROCEDURE - Step 10 [10/2023 - ]

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