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COOLANT (for Inverter): Replacement: Replacement

WARNING: This page is about a different variant/trim than selected.
  1. REMOVE NO. 1 ENGINE UNDER COVER  . Refer to REPLACEMENT - Step 2
  2. DRAIN COOLANT (for Inverter) 
    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.
      WARNING:

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

    2. Loosen the drain plug indicated in the illustration and drain the coolant.
      Fig 1: Identifying Drain Plug
      GTY278997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WARNING:

      Use caution when handling coolant immediately after driving or in summer because it may be hot.

    3. Tighten the plug.
  3. 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, the following DTCs may be stored.
      DTC Code Detection Item
      P0A01-726 Motor Electronics Coolant Temperature Sensor Circuit Range / Performance
      P0A04-725 Motor Electronics Coolant Temperature Sensor Circuit Intermittent
      P0A08-264 DC / DC Converter Status Circuit
      P0A78-284 Drive Motor "A" Inverter Performance
      P0A78-286 Drive Motor "A" Inverter Performance
      P0A79-692 Drive Motor "B" Inverter Performance
      P0A79-696 Drive Motor "B" Inverter Performance
      P0A7A-322 Generator Inverter Performance
      P0A7A-324 Generator Inverter Performance
      P0A93-346 Inverter Cooling System Performance
      P0A94-553 DC / DC Converter Performance
      P0A94-557 DC / DC Converter Performance
      P0AEE-277 Motor Inverter Temperature Sensor "A" Circuit Range / Performance
      P0AF1-276 Drive Motor Inverter Temperature Sensor "A" Circuit Intermittent / Erratic
      P0AF3-676 Sensor of Rear Motor Inverter Temperature
      P0AF6-675 Drive Motor Inverter Temperature Sensor "B" Circuit Intermittent / Erratic
      P0BCD-315 Generator Inverter Temperature Sensor Circuit Range / Performance
      P0BD0-314 Generator Inverter Temperature Sensor Circuit Intermittent / Erratic
      P0C39-626 DC / DC Converter Temperature Sensor "A" Range / Performance
      P0C3C-625 DC / DC Converter Temperature Sensor "A" Intermittent / Erratic
      P0C3E-628 DC / DC Converter Temperature Sensor "B" Range / Performance
      P0C41-627 DC / DC Converter Temperature Sensor "B" Intermittent / Erratic
      P0C73-776 Motor Electronics Coolant Pump "A" Control Performance
    1. Add coolant to the reserve tank.
      1. Slowly pour coolant into the inverter reservoir tank until it reaches the FULL line.
        Fig 2: Add Coolant To The Reserve Tank
        GTY277024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Coolant quantity

        2.3 liters (2.4 US qts, 2.1 Imp. qts.)

    2. When using the Techstream:
      1. Connect the Techstream to the DLC3.
      2. Turn the ignition switch to ON.
      3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.
      4. Keep the coolant at the FULL level in the reserve tank to compensate for the drop in coolant level when the air bleeds.

        Standard

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

        HINT: 

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

    3. When not using the Techstream:
      1. Turn the ignition switch to ON (READY). *1
      2. Turn the ignition switch off and keep the coolant at the FULL level in the reserve tank to compensate for the drop in coolant level when 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 vehicle is in the READY-on state because the engine operates intermittent.
      3. Repeat steps *1 and *2 until air bleeding from the coolant system is completed.

        Standard

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

        HINT: 

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

    4. Add coolant to the FULL mark of the reserve tank.
      Fig 3: Add Coolant To The Reserve Tank
      GTY277024Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT FOR COOLANT LEAKS (for Inverter)  See step  1
  5. INSTALL NO. 1 ENGINE UNDER COVER  . Refer to REPLACEMENT - Step 6
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