Coolant quantity:

2.3 liters (2.4 US qts, 2.1 Imp. qts.)

(b)When using the Techstream:
(1)Connect the Techstream to the DLC3.
(2)Turn the ignition switch to ON.(3)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 indicate that there is air in the coolant system.

(c)When not using the Techstream:
(1)Turn the ignition switch to ON (READY). *1
(2)Turn the ignition switch off and keep the coolant at the FULL level in the reserve tank to compensate for the drop in coolant level when the air bleeds.
*2NOTICE:*Be sure to turn the ignition 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 operates intermittent.(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 indicate that there is air in the coolant system.

 

Stating it for the record ..

For 450H, you need to put the vehicle in "service mode" to keep the ICE running during air purging [burping], Service mode is not for driving around.

Salim