COOLANT(for Inverter) REPLACEMENT

PROCEDURE

1. REMOVE ENGINE UNDER COVER

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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 reservoir tank cap.

   2. 

      Loosen the drain cock plug.

      CAUTION:

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

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, damage may occur and 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
     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 Range / 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. Tighten the drain cock plug.

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

      Standard Capacity
      Item Specified Condition for LHD 2.1 liters (2.2 US qts, 1.8 Imp. qts) for RHD 2.3 liters (2.4 US qts, 2.0 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 such as dust or dirt.

   3. When using the GTS:

      
      

      1. Connect the GTS 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 reservoir 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 reservoir tank improves.

         Tech Tips

         
         

         • If free spinning of the inverter water pump is detected for approximately 5 seconds, failsafe control will be activated to suspend the operation of the pump for approximately 15 seconds and resume operation for approximately 4 seconds repeatedly. Operation of the inverter water pump will return to normal if coolant is added.

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

   4. When not using the GTS:

      
      

      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]

         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 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 reservoir tank improves.

         Tech Tips

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

   5. After the air is completely bled from the cooling system, tighten the reservoir tank cap.

   6. Add coolant to the FULL line of the reservoir tank.

4. INSPECT FOR COOLANT LEAK (for Inverter)

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5. INSTALL ENGINE UNDER COVER

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