Coolant - Hybrid Drive: Service and Repair

Refilling And Bleeding

WARNING:
Never remove the cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the reservoir.

CAUTION:
When pouring inverter coolant, be sure to shut the relay box lid and not to let coolant spill on the electrical parts or the paint. If any coolant spills, rinse it off immediately.

1. Make sure the engine room and radiator are cool to the touch.
2. Remove the inverter reservoir cap (A) to help drain the coolant faster.




3. Loosen the drain plug (A), and drain the coolant.




4. Tighten the radiator drain plug securely.
5. After draining engine coolant in the reservoir tank, clean the tank.
6. Fill the radiator with water through the inverter reservoir cap and tighten the cap.

NOTE:

To most effectively bleed the air, pour the water slowly and press on the upper/lower radiator hoses.
7. Start the engine and allow to come to normal operating temperature. Wait for the cooling fans to turn on several times. Accelerate the engine to aid in purging trapped air. Shut engine off.
8. Repeat steps 1to 7 until the drained water runs clear.
9. Fill the reservoir with coolant. Fill fluid mixture with coolant and water (55 - 60%) slowly.

NOTE:
- Use only genuine antifreeze/coolant.
- For best corrosion protection, the coolant concentration must be maintained year-round at 55% minimum. Coolant concentrations less than 55% may not provide sufficient protection against corrosion or freezing.
- Coolant concentrations greater then 60% will impair cooling efficiency and are not recommended.

CAUTION:
- Do not mix different brands of antifreeze/coolants.
- Do not use additional rust inhibitors or antirust products; they may not be compatible with the coolant.

10. Start the engine and allow to come to normal operating temperature. Wait for the cooling fans to turn on several times. Accelerate the engine to aid in purging trapped air. Shut engine off.








11. When the EWP operates and coolant circulates, refill coolant so that the coolant level is kept between "MAX" and "MIN" level.

NOTE:
If EWP operates without a sufficient amount of coolant for approximately 5 seconds, the protect function will activate to stop the EWP for about 15 seconds. If a sufficient amount of coolant is added, EWP will start operating automatically.

12. When the operational sound volume of the EWP becomes small and when no air bubbles can be seen in the reservoir tank, bleeding of the coolant system is completed. (It would take about 3 - 5 minutes.)

NOTE:
After air bleeding is completed make sure that coolant in the reservoir flow without air bubble during the EWP actuation.
If the coolant flow is not seen or air bubbles are still seen, repeat steps 9 to 12.

13. After air bleeding is completed, stop the EWP, add coolant to the "MAX" level, and install the reservoir cap.

NOTE:
Make sure to add more coolant than was drained initially.

Coolant capacity :
2.26L (0.60 U.S.gal., 2.39 U.S.qt., 1.99 lmp.qt.)