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.
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.
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.
Install the plug with a new gasket.
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 |
---|---|
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 |
Slowly pour coolant into the reserve tank until it reaches the FULL line.
Coolant quantity |
---|
3.2 liters (3.4 US qts, 2.8 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.
When using the Techstream:
Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.
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. |
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 assembly and poor circulation of coolant in the reserve tank indicates that there is air in the cooling system.
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 cooling system.
When not using the Techstream:
Turn the power switch on (READY).[*1]
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.
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. |
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 cooling system.
After the air is completely bled from the cooling system, tighten the reserve tank cap.
Add coolant to the FULL line of the reserve tank.
INSPECT FOR COOLANT LEAK (for Inverter)
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.
Install the radiator cap tester.
Pump the radiator cap tester to 122 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.
Reinstall the reserve tank cap.