COOLANT(for Inverter) ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT FOR COOLANT LEAK (for Inverter)


    1. Remove the reserve tank cap.

      CAUTION:

      To avoid the danger of being burned, do not remove the reserve tank cap while the coolant for the inverter is still hot.

    2. A004YT8

      Install a radiator cap tester.

    3. Pump the radiator cap tester to 122 kPa (1.2 kgf/ cm2, 18 psi), and then check that the pressure does not drop.

      Tech Tips

      If the pressure drops, check the hoses, radiator, inverter water pump assembly, inverter with converter, and hybrid vehicle transaxle assembly for leaks.

    4. Reinstall the reserve tank cap.

  2. INSPECT COOLANT LEVEL IN RESERVE TANK (for Inverter)


    1. The coolant should be between the L and F lines when the coolant for the inverter is cold.

      Tech Tips

      If the coolant level is low, check for leaks and add TOYOTA Super Long Life Coolant (SLLC) or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life hybrid organic acid technology up to the full line.

  3. INSPECT COOLANT (for Inverter)


    1. Remove the reserve tank cap.

      CAUTION:

      To avoid the danger of being burned, do not remove the reserve tank cap while the coolant for the inverter is still hot.

    2. Check for excessive deposits of rust or scale on and around the reserve tank cap and its opening.

      Tech Tips

      If excessively dirty, replace the coolant for the inverter.

    3. Reinstall the reserve tank cap.

  4. INSPECT RESERVE TANK CAP (for Inverter)


    1. A004XD5E14
      Text in Illustration
      *1 O-ring
      *2 Rubber Packing

      Inspect the reserve tank cap.


      1. If there are water stains or foreign matter on the O-ring, clean it with water and finger scouring.

        Note

        Do not use any tools.

      2. Check that the O-ring is not deformed, cracked, or damaged.

      3. Check that the O-ring is not swollen.

    2. A004ZX8E18
      Text in Illustration
      *1 Radiator Cap Tester
      *2 Reserve Tank Cap
      *a 30° or more

      Check the reserve tank cap operation.


      1. Apply coolant (for inverter) to the O-ring and rubber packing before using a radiator cap tester.

      2. Install the reserve tank cap to the radiator cap tester.

      3. Pump the cap tester several times, and check the maximum pressure.

        Judgment Criterion
        Standard value (for brand-new cap)

        94 to 122 kPa (1.0 to 1.2 kgf/cm2, 13.6 to 18 psi)

        Minimum standard value (for used cap)

        94 kPa (1.0 kgf/cm2, 13.6 psi)

        Pump speed 1 pump per second

        Note

        When using the cap tester, tilt it 30° or more.

        Tech Tips

        If the maximum pressure is less than the minimum standard value, replace the reserve tank cap.