KIA Niro: Hybrid Motor Cooling System

Kia Niro - First generation - (DE) (2017-2022) - Service and Repair Manual / Hybrid Motor System / Hybrid Motor Cooling System

Description

The Hybrid Power Control Unit (HPCU) uses various semiconductors that are supplied with high voltage, hence generating more heat than engine combustion devices. Overheating can decrease the efficiency of control devices, restrict proper operation and melt semiconductors in excessive heat, causing system failure. To prevent this, the hybrid system is equipped with a separate cooling system.

Component location

Component location

HPCU (Hybrid Power Control Unit) (LDC+MCU+HCU+Reservoir)
Hybrid drive motor
Hybrid starter generator (HSG)
Electrical radiator
Electric water pump (EWP)

Radiator Repair procedures

Removal Disconnect the negative (-) cable of the 12V battery. Remove the under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover") Drain the coolant of hybrid motor cooling system. (Refer to Hybrid Motor Cooli

Electric Water Pump (EWP) Repair procedures | Reservoir

Removal Disconnect the negative (-) cable of the 12V battery. Remove the under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover") Drain the coolant of hybrid motor cooling system.

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Basic Inspection Procedure

Measuring Condition of Electronic Parts' Resistance The measured resistance at high temperature after vehicle running may be high or low. So all resistance must be measured at ambient temperature (20ÂºC, 68ÂºF), unless stated otherwise.

Motor room compartment (Kia Niro EV only)

Coolant reservoir Brake fluid reservoir * This part is located on the opposite side for Right-hand drive vehicle. Windshield washer fluid reservoir Fuse box Negative battery terminal (-) Positive battery terminal (+) Front tr