Coolant - Hybrid Drive: Service and Repair

P310 HYBRID VEHICLE CONTROL: COOLANT (for Inverter): REPLACEMENT

1. REMOVE NO. 2 ENGINE ROOM SIDE COVER LH Removal

2. DRAIN COOLANT (for Inverter)

NOTICE:
* 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.
(a) Remove the inverter reserve tank cap.

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

(b) 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.

(c) Install the plug with a new gasket.

Torque : 39 Nm (398 kgf-cm, 29 ft-lbf)

3. ADD COOLANT (for Inverter)

NOTICE:
* Do not reuse the drained coolant because it may contain foreign objects.
* If the vehicle is driven with air in the inverter cooling system, the following DTCs may be set.






(a) Loosen the bleeder plug shown in the illustration and connect a hose.





NOTICE:
Insert one end of the hose into the reserve tank.

(b) Add coolant to the reserve tank.

(c) Add coolant until the level of coolant in the hose attached to the bleeder plug reaches the same level as the FULL line of the reserve tank.





Coolant quantity:

3.4 liter (3.6 US qts, 3.0 Imp. qts.)

(d) When using the Techstream:

(1) Connect the Techstream to the DLC3.

(2) Turn the power switch on (IG).

(3) On the Techstream, enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.

(4) Keep the coolant at the FULL level in the reserve tank to compensate for the drop in coolant level when the air bleeds.

Standard:

Air bleeding from the coolant system is completed when the noise made by the water pump becomes smaller and the circulation of coolant in the reserve tank improves.

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

(e) When not using the Techstream:

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

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

NOTICE:
* 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 coolant system is completed.

Standard:

Air bleeding from the coolant system is completed when the noise made by the water pump becomes smaller and the circulation of coolant in the reserve tank improves.

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

(f) When the air is completely bled from the coolant system, tighten the plug.

(g) Add coolant to the FULL mark of the reserve tank.





4. INSPECT FOR COOLANT LEAKS (for Inverter) Testing and Inspection

5. INSTALL NO. 2 ENGINE ROOM SIDE COVER LH Installation