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Home >> Toyota >> 2021 >> Supra Premium >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System (B58) - Inspection >> Cooling System >> On-Vehicle Inspection [03/2019 - ] >> Procedure

On-Vehicle Inspection [03/2019 - ]: Procedure

  1. INSPECT FOR COOLANT LEAK (for High Temperature) 
    NOTE:
    • Hot surfaces.

      Risk of burning!

      • Perform all work only on components that have cooled down.
    1. Loosen reserve tank cap sub-assembly (1).
      GTY946160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Attach the special tool 0 494 418 (17 0 101) with 0 494 419 (17 0 102) and 0 494 422 (17 0 105) from the set of special tools 0 494 417 (17 0 100).
      GTY946474Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09200-WA050 
    3. Build up excess pressure and wait approx. 2 minutes.

      Standard

      150 kPa (1.5 kgf/cm2 , 22 psi)

      Electric switch valve must open at latest when the pressure is lower than the ambient pressure.

      Maximum 

      10 kPa (0.1 kgf/cm2 , 1 psi)

      HINT: 

      • If the described test step is not completed successfully: repeat test step twice. Only replace the reserve tank cap sub-assembly after three tests with an incorrect opening pressure.
      • When driving at high ambient temperatures, the design may cause the pressure relief valve in the reserve tank cap sub-assembly to open slightly and air to escape together with dissolved coolant.
      • This coolant vapor condenses on the surface of the radiator reserve tank assembly and leaves traces of coolant when the vehicle has cooled down. These traces of coolant do not indicate whether the reserve tank cap sub-assembly is defective or not.
      • Escaping coolant vapor when the vehicle is at standstill may cause the pressure relief valve to stick to the reserve tank cap sub-assembly. This may cause an incorrect opening pressure.
    4. Screw on reserve tank cap sub-assembly (1) on special tool 0 494 643 (17 0 114) from the set of special tools 0 494 417 (17 0 100).
      GTY945920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09200-WA050 
    5. Build up the pressure with special tools 0 494 418 (17 0 101) and 0 494 419 (17 0 102) from the set of special tools 0 494 417 (17 0 100).
    6. Observe on the pressure measuring device when the opening pressure has been reached.

      Maximum

      140 kPa (1.4 kgf/cm2 , 20 psi)

    7. Close reserve tank cap sub-assembly.
    8. Close the reserve tank cap sub-assembly until the arrows are flush.
  2. INSPECT FOR COOLANT LEAK (for Low Temperature) 
    NOTE:
    • Hot surfaces.

      Risk of burning!

      • Perform all work only on components that have cooled down.
    1. Loosen radiator reserve tank cap sub-assembly (1).
      GTY946155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Attach the special tool 0 494 418 (17 0 101) with 0 494 419 (17 0 102) and 0 494 426 (17 0 109) from the set of special tools 0 494 417 (17 0 100).
      GTY946473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • SST: 09200-WA050 
    3. Build up excess pressure and wait for approximately 2 minutes.

      Standard

      150 kPa (1.5 kgf/cm2 , 22 psi)

      Electric switch valve must open at latest when the pressure is lower than the ambient pressure.

      Maximum 

      10 kPa (0.1 kgf/cm2 , 1 psi)

      HINT: 

      • If the described test step is not completed successfully: repeat test step twice. Only replace the radiator reserve tank cap sub-assembly after three tests with an incorrect opening pressure.
      • When driving at high ambient temperatures, the design may cause the pressure relief valve in the radiator reserve tank cap sub-assembly to open slightly and air to escape together with dissolved coolant.
      • This coolant vapor condenses on the surface of the radiator reserve tank sub-assembly and leaves traces of coolant when the vehicle has cooled down. These traces of coolant do not indicate whether the radiator reserve tank cap sub-assembly is defective or not.
      • Escaping coolant vapor when the vehicle is at standstill may cause the pressure relief valve to stick to the radiator reserve tank cap sub-assembly. This may cause an incorrect opening pressure.
    4. Screw on radiator reserve tank cap sub-assembly (1) on special tool 0 495 889 (17 0 115) from the set of special tools 0 494 417 (17 0 100).
      • SST: 09200-WA050 
      GTY946252Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Build up the pressure with the special tool 0 494 418 (17 0 101) and 0 494 419 (17 0 102) from the special tool set 0 494 417 (17 0 100).
    6. Observe on the pressure measuring device when the opening pressure has been reached.

      Minimum

      140 kPa (1.4 kgf/cm2 , 20 psi)

    7. Close radiator reserve tank cap sub-assembly.
  3. INSPECT ENGINE COOLANT 
    1. Check the connections, hose clamps and hoses for coolant residues and damage such as e.g. cracks.
    2. Check the coolant composition in both radiator reserve tank.
      WARNING:
      • When engine assembly and radiator assembly is hot, do not remove the radiator cap sub-assembly and air release valve.
      • Fluid and steam may spray out due to high pressure, possibly resulting in burns.
    3. Check the coolant level in both radiator reserve tank.

      The filling level in the radiator reserve tank must be between the minimum and maximum mark.

    4. Adjust filling level in the radiator reserve tank to the desired filling level.

      The according amount of coolant must be supplemented or drawn off.

      HINT: 

      When using Antifreeze and Corrosion Inhibitor Frostox HT-12, dilute the Antifreeze and Corrosion Inhibitor Frostox HT-12 to 50% before using it.

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