Coolant - Hybrid Drive: Service and Repair

L110 HYBRID VEHICLE CONTROL: COOLANT (for Inverter): REPLACEMENT

REPLACEMENT

1. REMOVE ENGINE UNDER COVER
2. REMOVE NO. 2 ENGINE UNDER COVER
3. REMOVE COOL AIR INTAKE DUCT SEAL Removal

4. REMOVE ENGINE ROOM SIDE COVER LH Removal

5. REMOVE ENGINE ROOM SIDE COVER RH Removal

6. DRAIN COOLANT (for Inverter)
NOTE: Collect the drained coolant and measure its volume to ensure that more coolant than the measured volume is added.

(a) Remove the inverter radiator cap.
CAUTION: Only hold the cap when removing the inverter radiator cap. Holding other parts may cause your fingers to be caught between the cap and the protrusion on the filler tank.





(b) Using a hexagon wrench (6 mm), loosen the bleeder plug indicated in illustration A and connect the hose.
- Insert the other end of the hose into the filler tank.
- Be sure to hold the bleeder when loosening the bleeder plug.

(c) Remove the plug indicated in illustration B and connect the hose.
NOTE: Insert the other end of the hose into the filler tank.





(d) Loosen the drain plug indicated in the illustration to drain the coolant.
NOTE: Be sure to use a tool to hold the end of the hose when loosening the drain plug

(e) After draining the coolant, tighten the drain plug.
Torque: 13 Nm (130 kgf-cm, 10 ft-lbf)






(f) Using a hexagon wrench (10 mm), remove the drain plug indicated in the illustration and drain the coolant.
(g) Using a hexagon wrench (10 mm), install the drain plug with a new gasket.
Torque: 39 Nm (398 kgf-cm, 29 ft-lbf)
7. ADD COOLANT (for Inverter)
NOTE: If the vehicle is driven with air in the coolant system, the following DTC will be output.





HINT: Coolant (for Inverter) capacity: 2.9 liters (3.1 US qts, 2.6 lmp. qts.)





(a) Using a hexagon wrench (6 mm), loosen the bleeder plug indicated in illustration A and connect the hose.
- Insert the other end of the hose into the filler tank.
- Be sure to hold the bleeder when loosening the bleeder plug.

(b) Remove the plug indicated in illustration B and connect the hose.
NOTE: Insert the other end of the hose into the filler tank.

(c) Add coolant from the filler tank.






(d) Add coolant until the coolant level in the connected hose and at the opening of the filler tank become equal. Using a hexagon wrench (6 mm), tighten the bleeder plug indicated in illustration A.
Torque: 1.5 Nm (15 kgf-cm, 13 in-lbf)
NOTE: If the bleeder plug is tightened to more than the specified torque, the end of the connected hose may be deformed.

(e) Disconnect the hose indicated in illustration B and install the plug.
(f) Connect the Techstream to the DLC3.
(g) Turn the power switch on (IG) and turn the Techstream on.
(h) On the system selection screen, enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.
(i) According to the display on the tester, perform the appropriate active test.
HINT: The water pump can also be operated using inspection mode Component Tests and General Diagnostics.

(j) While adding coolant so that the coolant level is kept around the opening of the filler tank, operate the water pump for approximately 3 minutes and then stop it for one minute.
HINT:
- l If the water pump operates without a sufficient amount of coolant for approximately 5 seconds, the protective circuit will activate to stop the water pump for approximately 15 seconds. If a sufficient amount of coolant is added, the water pump will start operating automatically.
- l If an excessive amount of coolant is added to the filler tank, coolant may overflow when operation of the water pump is stopped.

(k) While adding coolant so that the coolant level is kept around the opening of the filler tank, operate the water pump for approximately 1 minute and stop it for 1 minute and repeat this procedure until bleeding is completed.
Standard:
When the operational sound volume of the water pump becomes small or when no air bubbles can be seen in the filler tank, bleeding of the coolant system is complete.
(l) After bleeding is completed, add coolant until the coolant level is around the opening of the filler tank. Install the inverter radiator cap.
NOTE: Make sure that more coolant than the volume collected coolant volume is added.

8. CHECK FOR COOLANT LEAKS (for Inverter)
9. INSTALL ENGINE ROOM SIDE COVER RH Installation

10. INSTALL ENGINE ROOM SIDE COVER LH Installation

11. INSTALL COOL AIR INTAKE DUCT SEAL Installation

12. INSTALL NO. 2 ENGINE UNDER COVER
13. INSTALL ENGINE UNDER COVER