Kia Niro: Hybrid Motor Cooling System / Description and operation

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.

Hybrid Motor Cooling System
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Radiator Components and components location
Components Location 1. Radiator 2. Drain plug 3. Radiator lower hose 4. Radiator upper hose ...

Other information:

Kia Niro 2017 (DE HEV) Service Manual: Heated Oxygen Sensor (HO2S) Schematic diagrams
Circuit Diagram Harness Connector [Bank 1 / Sensor 1] [Bank 1 / Sensor 2] ...

Kia Niro 2017 (DE HEV) Service Manual: Electric Water Pump(EWP) Repair procedures
Removal 1. Disconnect the 12V battery negative cable. 2. Remove the under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover") 3. Drain the coolant of hybrid motor cooling system. (Ref ...

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