Hyundai Ioniq (AE): Heater Hose Pump / Description and operation

Hyundai Ioniq (AE) 2017-2022 Service & Repair 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

    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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