COOLANT (for Inverter) REPLACEMENT


  1. REMOVE NO. 1 ENGINE UNDER COVER

  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.

      CAUTION:

      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. A01NDPX

      Loosen the drain plug indicated in the illustration and drain the coolant.

      CAUTION:

      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 set.

      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.

    2. A01NFAW

      Slowly pour coolant into the radiator reservoir tank until it reaches the FULL line.

      Coolant quantity
      1.9 liter (2.0 US qts, 1.7 Imp. qts.)

    3. When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Turn the power switch on (IG).

      3. On the intelligent tester, 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.

        Tech Tips

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

    4. When not using the intelligent tester:


      1. Turn the power switch on (READY). [*1]

      2. Turn the power 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 power 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 is in intermittent operation.

      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.

        Tech Tips

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

    5. A01NFAW

      Add coolant to the FULL mark of the reserve tank.

  4. INSPECT FOR COOLANT LEAKS (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. A01NFFO

      Install the radiator cap tester.

    3. Pump the radiator cap tester to 118 kPa (1.2 kgf/ cm2, 17 psi), and then check that the pressure does not drop.

      Tech Tips

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

    4. Reinstall the reserve tank cap.

  5. INSTALL NO. 1 ENGINE UNDER COVER