COOLANT (for Inverter) > REPLACEMENT

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1. REMOVE NO. 1 ENGINE UNDER COVER


2. DRAIN COOLANT (for Inverter)

NOTICE:
  1. Do not reuse the drained coolant because it may contain foreign objects.
  2. 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 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.



    A214669

  1. Using a hexagon wrench (10 mm), remove 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.

  1. Install the plug with a new gasket.

    Torque:
    39 N*m{ 397 kgf*cm , 29 ft.*lbf }



3. ADD COOLANT (for Inverter)

NOTICE:
  1. Do not reuse the drained coolant because it may contain foreign objects.
  2. If the vehicle is driven with air in the inverter cooling system, damage may occur and the following DTCs may be stored.

    DTC No.
    		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
    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
    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



    A248471

  1. Slowly pour coolant into the reserve tank until it reaches the full line.

    Coolant quantity:
    2.1 liters (2.2 US qts, 1.8 Imp. qts.)

  1. When using the intelligent tester:

    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.

    4. Keep the coolant at the full line in the reserve tank to compensate for the drop in coolant level when the air bleeds.

      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 reserve tank improves.

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

  1. When not using the intelligent tester:

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

    2. Turn the power switch off and add coolant to the full line because the coolant level drops as the air bleeds. [*2]

      NOTICE:
      1. Be sure to turn the power switch off before adding SLLC.
      2. 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 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 reserve tank improves.

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

  1. After the air is completely bled from the cooling system, tighten the reserve tank cap.



    A248471

  1. Add coolant to the full line of the reserve tank.



4. 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.



    A248084

  1. Install a radiator cap tester.

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

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

  1. Reinstall the reserve tank cap.



5. INSTALL NO. 1 ENGINE UNDER COVER