Hyundai Ioniq: Heater Hose Pump / Description and operation

Hyundai Ioniq (AE) 2017-2025 Service Manual / Heating, Ventilation and Air Conditioning / Heater Hose Pump / Description and operation

Description

In ordinary cars, the mechanical water pump mounted on the engine for heating purposes is activated to circulate the cooling water, but in hybrid cars, AEWP is used to circulate the cooling water when the engine is not operating.

Classification	System	Cooling water used			Mechanical water pump	AEWP	Purpose of use	Note (role of AEWP)
		Engine	Heater	WHRS
While Engine is working (AEWP activated)		O	O	O	On	Off	Cooling engine (main function)	-
							Heating	-
							Exhaust heat recovery and WHRS cooling	-
						On	Fast warm -up while cooling or heating is turned on	Increased volume of cooling water circulation
Right after engine is turned off (EWP working)		X	O	O	Off	On	Heating	In the EV mode, the cooling water is circulated towards the heater.
							Cooling the exhaust heat recovery system	During key off, the cooling is supplied for the exhaust heat recovery system

Heater Hose Pump

Repair procedures

Replacement1.Remove the battery (-) terminal.2.Remove the engine room under cover.(Refer to Engine Mechanical System - "Engine Room Under Cover")3.Remove the heater hose (A) and AEWP hose (B)...

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