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Home >> Toyota >> 2019 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Cooling System (1AR-FE) (Service Information) (Except Hybrid)) >> Radiator >> On-Vehicle Inspection [11/2016 - ] >> Procedure

On-Vehicle Inspection [11/2016 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK RADIATOR CAP SUB-ASSEMBLY 
    1. Measure the valve opening pressure.
      GTY430413Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rubber Packing (1)
      *b Rubber Packing (2)
      *c Rubber Packing (3)
      *d Valve Seat
      1. If there are water stains or foreign matter on the rubber packings (1), (2) or (3), clean the part(s) with water and finger scouring.
      2. Check that the rubber packings (1), (2) and (3) are not deformed, cracked or swollen.
      3. Check that the rubber packing (3) and valve seat are not stuck together.
      4. Apply engine coolant to the rubber packings (2) and (3) before using a radiator cap tester.
      5. When using the radiator cap tester, tilt it upward 30° or more.
        GTY452114Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *1 Radiator Cap Sub-assembly
        *a Radiator Cap Tester
        *b 30° or more
      6. Pump the radiator cap tester several times, and check the maximum pressure.

        Pumping Speed

        1 pump per second

        HINT: 

        Even if the radiator cap sub-assembly cannot maintain the maximum pressure, it is not a defect.

        Result

        Item Specified Condition
        Standard value
        (for brand-new radiator cap sub-assembly)        		 93 to 123 kPa (0.9 to 1.3 kgf/cm2 , 13.5 to 18.0 psi)
        Minimum standard value
        (for used radiator cap sub-assembly)        		 79 kPa (0.8 kgf/cm2 , 11.5 psi)

        If the maximum pressure is less than the minimum pressure, replace the radiator cap sub-assembly.

  2. CHECK RADIATOR ASSEMBLY FOR CLOGGING 
    WARNING:

    To prevent burns, do not touch the engine or other high temperature components while the engine is hot.

    1. Remove the radiator side deflector seal LH.

      Refer to PROCEDURE - Step 1

    2. Remove the radiator side seal RH.

      Refer to PROCEDURE - Step 2

    3. Remove the cool air intake duct seal.

      Refer to PROCEDURE - Step 3

    4. Remove the inlet air cleaner assembly.

      Refer to PROCEDURE - Step 25

    5. Shine a flashlight at the radiator assembly and cooler condenser assembly from the front of the cooler condenser assembly and check the radiator assembly for clogging using a mirror.
      GTY713711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a OK *b NG
      *c Flashlight *d Mirror
      *e Areas to be checked - -

      OK

      The radiator assembly is not clogged.

      If the radiator assembly is clogged, clean it.

    6. Install the inlet air cleaner assembly.

      Refer to PROCEDURE - Step 52

    7. Install the cool air intake duct seal.

      Refer to PROCEDURE - Step 4

    8. Install the radiator side seal RH.

      Refer to PROCEDURE - Step 5

    9. Install the radiator side deflector seal LH.

      Refer to PROCEDURE - Step 6

  3. CLEAN RADIATOR ASSEMBLY 
    WARNING:

    To prevent burns, do not touch the engine or other high temperature components while the engine is hot.

    1. Remove the radiator side deflector seal LH.

      Refer to PROCEDURE - Step 1

    2. Remove the radiator side seal RH.

      Refer to PROCEDURE - Step 2

    3. Remove the cool air intake duct seal.

      Refer to PROCEDURE - Step 3

    4. Remove the inlet air cleaner assembly.

      Refer to PROCEDURE - Step 25

    5. Cover the opening of each air duct with a piece of cloth.
    6. Clean the cooler condenser assembly.
      1. Check that the washer nozzle is not clogged.
      2. Insert the washer nozzle into the space in front of the cooler condenser assembly and spray it.
        NOTE:
        • Clean the fins of the cooler condenser assembly by spraying the entire area for 150 seconds. Repeat this process twice.
        • Set the air pressure to 0.4 MPa (4.1 kgf/cm2 , 58 psi).
        • Check that water sprays in mist form from the nozzle.
        • Keep the nozzle parallel to the cooler condenser assembly.
        • Do not allow the nozzle to contact the fins of the cooler condenser assembly.
        • Keep the nozzle moving while spraying water.
        • Do not spray the cooler compressor assembly or generator assembly excessively.
        GTY692398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Leave the cooler condenser assembly as is for 10 minutes to let the water penetrate the dirt.
      4. Clean the cooler condenser assembly again.
        NOTE:
        • Clean the fins of the cooler condenser assembly by spraying the entire area for 150 seconds. Repeat this process twice.
        • Set the air pressure to 0.4 MPa (4.1 kgf/cm2 , 58 psi).
        • Check that water sprays in mist form from the nozzle.
        • Keep the nozzle parallel to the cooler condenser assembly.
        • Do not allow the nozzle to contact the fins of the cooler condenser assembly.
        • Keep the nozzle moving while spraying water.
        • Do not spray the cooler compressor assembly or generator assembly excessively.
      5. Using an air blow gun, dry the cooler condenser assembly for 3 minutes.
    7. Disconnect the cooling fan ECU connector.
      GTY443802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Disengage the 4 wire harness clamps.
    9. Disengage the 3 claws and separate the fan shroud assembly from the radiator assembly.
      GTY692035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    10. Clean the radiator assembly.
      1. Insert the washer nozzle between the radiator assembly and fan shroud and spray the radiator assembly.
        GTY692397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE:
        • Clean the fins of the radiator assembly by spraying the entire area for 150 seconds. Repeat this process twice.
        • Set the air pressure to 0.4 MPa (4.1 kgf/cm2 , 58 psi).
        • Check that water sprays in mist form from the nozzle.
        • Keep the nozzle parallel to the radiator assembly.
        • Do not allow the nozzle to contact the fins of the radiator assembly.
        • Keep the nozzle moving while spraying water.
      2. Leave the radiator assembly as is for 10 minutes to let the water penetrate the dirt.
      3. Clean the radiator assembly again.
        NOTE:
        • Clean the fins of the radiator assembly by spraying the entire area for 150 seconds. Repeat this process twice.
        • Set the air pressure to 0.4 MPa (4.1 kgf/cm2 , 58 psi).
        • Check that water sprays in mist form from the nozzle.
        • Keep the nozzle parallel to the radiator assembly.
        • Do not allow the nozzle to contact the fins of the radiator assembly.
        • Keep the nozzle moving while spraying water.
      4. Using an air blow gun, dry the radiator assembly for 3 minutes.
    11. Check the fins of the radiator assembly for clogs again.

      If the radiator assembly is clogged, clean the cooler condenser assembly and radiator assembly again.

    12. Check that the 3 guides at the bottom are engaged to the radiator assembly.
      GTY692036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. Engage the 3 claws to install the fan shroud assembly to the radiator assembly.
    14. Engage the 4 wire harness clamps.
    15. Connect the cooling fan ECU connector.
    16. Remove the piece of cloth from the opening of each air duct.
    17. Install the inlet air cleaner assembly.

      Refer to PROCEDURE - Step 52

    18. Install the cool air intake duct seal.

      Refer to PROCEDURE - Step 4

    19. Install the radiator side seal RH.

      Refer to PROCEDURE - Step 5

    20. Install the radiator side deflector seal LH.

      Refer to PROCEDURE - Step 6

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