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Replacement [11/2020 - ]: Procedure

  1. REMOVE UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 5 [11/2020 - 11/2021] , or refer to PROCEDURE - Step 5 [11/2021 - 12/2022] , or refer to PROCEDURE - Step 5 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 5 [12/2023 - ]

  2. REMOVE RADIATOR COVER PLATE 

    Refer to PROCEDURE - Step 6 [11/2020 - 11/2021] , or refer to PROCEDURE - Step 6 [11/2021 - 12/2022] , or refer to PROCEDURE - Step 6 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 6 [12/2023 - ]

  3. REMOVE LOWER RADIATOR AIR DEFLECTOR 

    See step  3

  4. REMOVE FRONT COMPARTMEMT UNDER COVER ASSEMBLY 

    Refer to PROCEDURE - Step 20 [11/2020 - 11/2021] , or refer to PROCEDURE - Step 20 [11/2021 - 12/2022] , or refer to PROCEDURE - Step 20 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 20 [12/2023 - ]

  5. DRAIN COOLANT (for Inverter) 
    WARNING:
    • To avoid the danger of being burned, do not remove the reserve tank cap or drain cock plug while the coolant (for inverter) is still hot.
    • Pressurized, hot coolant (for inverter) and steam may be released and cause serious burns.
    NOTE:
    • Do not reuse the drained coolant because it may contain foreign objects.
    • Collect the drained coolant and measure its volume to establish a benchmark. When adding coolant, make sure to add more coolant than the measured amount.
    1. Remove the inverter reserve tank cap from the inverter reserve tank assembly.
    2. Connect a hose to the drain cock as shown in the illustration.
      GTY1002308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Drain Cock Plug
      *a Hose
    3. Loosen the drain cock plug and drain the coolant.
    4. Tighten the drain cock plug.
    5. Disconnect the hose from the radiator drain cock.
  6. ADD COOLANT (for Inverter) 
    NOTE:
    • Do not reuse the drained coolant because it may contain foreign objects.
    • If the vehicle is driven with air in the inverter cooling system, damage may occur and the following DTCs may be set.
    DTC Code Detection Item
    P0A9300 Inverter "A" Cooling System Performance
    P0C7396 Motor Electronics Coolant Pump "A" Component Internal Failure
    P0A001C Motor Electronics Coolant Temperature Sensor "A" Circuit Voltage Out of Range
    P0A0011 Motor Electronics Coolant Temperature Sensor Circuit Short to Ground
    P0A0015 Motor Electronics Coolant Temperature Sensor "A" Circuit Short to Battery or Open
    P0A789E Drive Motor "A" Inverter Fail Signal Stuck On
    P0A949E DC/DC Converter "A" Fail Signal Stuck On
    P0AED1C Drive Motor InverterTemperature Sensor "A" Circuit Voltage Out of Range
    P0AED11 Drive Motor Inverter Temperature Sensor "A" Circuit Short toGround
    P0AED15 Drive Motor InverterTemperature Sensor "A" Circuit Short to Battery or Open
    P0C381C DC/DC Converter Temperature Sensor "A" Circuit Voltage Out of Range
    P0C381F DC/DC Converter Temperature Sensor "A" Circuit Intermittent
    P0C3D1C DC/DC ConverterTemperature Sensor "B" Circuit Voltage Out of Range
    P0C3D1F DC/DC ConverterTemperature Sensor "B" Circuit Intermittent
    P1CCC96 DC/DC Converter Enable Component Internal Failure
    1. Slowly pour coolant into the inverter reserve tank assembly until it reaches the MAX line.

      Standard Capacity

      4.0 liters (4.2 US qts, 3.5 Imp. qts)

      NOTE:

      To prevent foreign matter such as dust or dirt from entering the cooling system, make sure to confirm that the container used to add coolant is clean and free of foreign matter.

    2. When using the GTS:
      1. Activate the Inverter Water Pump

        Powertrain > EV > Active Test 

        Tester Display
        Activate the Inverter Water Pump
      2. While adding coolant to the inverter reserve tank assembly to keep the coolant at the MAX line and compensate for the drop in the coolant level as the air bleeds, operate and stop the inverter water pump assembly at 1 minute intervals.

        Standard

        Air bleeding from the inverter cooling system is completed when the noise made by the inverter water pump assembly becomes smaller and the circulation of coolant in the inverter reserve tank assembly improves.

        HINT: 

        Loud noises made by the inverter water pump assembly and poor circulation of coolant in the inverter reserve tank assembly indicate that there is air in the cooling system.

    3. When not using the GTS:
      1. Turn the ignition switch on (READY). [*1]
      2. Turn the ignition switch off and add coolant to the MAX line as the coolant level will drop as the air bleeds. [*2]
        NOTE:
        • Be sure to turn the ignition switch off before adding SLLC.
        • Do not work on the components in the engine compartment while the ignition switch is on (READY) as the engine will operate intermittently.
      3. Repeat steps [*1] and [*2] until air bleeding from the cooling system is completed.

        Standard

        Air bleeding from the inverter cooling system is completed when the noise made by the inverter water pump assembly becomes smaller and the circulation of coolant in the inverter reserve tank assembly improves.

        HINT: 

        Loud noises made by the inverter water pump assembly and poor circulation of coolant in the inverter reserve tank assembly indicate that there is air in the cooling system.

    4. After the air is completely bled from the cooling system, add coolant to the MAX line of inverter reserve tank assembly and install the reserve tank cap.
      GTY1002776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT FOR COOLANT LEAK (for Inverter) 

    Refer to PROCEDURE - Step 1

  8. INSTALL FRONT COMPARTMEMT UNDER COVER ASSEMBLY 

    Refer to PROCEDURE - Step 163 [11/2020 - 12/2022] , or refer to PROCEDURE - Step 163 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 163 [12/2023 - ]

  9. INSTALL LOWER RADIATOR AIR DEFLECTOR 

    Refer to PROCEDURE - Step 176 [11/2020 - 12/2022] , or refer to PROCEDURE - Step 176 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 176 [12/2023 - ]

  10. INSTALL RADIATOR COVER PLATE 

    Refer to PROCEDURE - Step 177 [11/2020 - 12/2022] , or refer to PROCEDURE - Step 177 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 177 [12/2023 - ]

  11. INSTALL UPPER RADIATOR SUPPORT SEAL 

    Refer to PROCEDURE - Step 178 [11/2020 - 12/2022] , or refer to PROCEDURE - Step 178 [12/2022 - 12/2023] , or refer to PROCEDURE - Step 178 [12/2023 - ]

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