KIA Niro: Electric Water Pump (EWP) Repair procedures

Kia Niro - First generation - (DE) (2017-2022) - Service and Repair Manual / Service Highlight / Hybrid Motor Cooling System / Electric Water Pump (EWP) Repair procedures

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.

Specification

Specification

Electric Water Pump (EWP) Repair procedures

Electric Water Pump (EWP) 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 Cooling System - "Coolant")
Separate the hose (A) from the reservoir.

Separate the hose (A).

Disconnect the EWP connector (A) and then remove the EWP after removing the bracket (B).

Tightening torque : 9.8 - 11.8 N*m (1.0 - 1.2 kgf*m, 7.2 - 8.7 lb*ft)

Separate the hoses (A, B) from the EWP.

Installation

Installation

Install in the reverse order of removal.

Warning

Be careful not to damage other hoses nearby when tightening the clamp.
Install the clamp in the specified direction to prevent interference with surrounding components.
Refill the hybrid motor cooling system with coolant and then perform the air bleeding using the KDS.
(Refer to Hybrid Motor Cooling System - "Coolant")
After installing, check for leakage of coolant or fluid from hose connection during engine start.

Refilling And Bleeding

Warning Never remove the cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the reservoir. Warning When pouring inverter coolant, be sure to shut the relay box lid to prevent spilling c

AHB(Active Hydraulic Boost) System

AHB(Active Hydraulic Boost) System / Description And Operation

Description Regeneration Brake System During deceleration or braking of an electric vehicle or HEV, the drive motor acts as an alternator and charges the battery by converting the vehicle's kinetic energy generated during braking into electrical

SEE MORE:

Automatic reversal

If the sunroof glass senses any obstacle while it is closing automatically, it will reverse direction then stop at a certain position. The auto reverse function may not work if an object thin or soft is caught between the sliding sunroof

Rear Cross Member Repair procedures

Removal Disconnect the battery negative cable. Remove the wheel and tire. Tightening torque: 107.9 - 127.5 N*m (11.0 - 13.0 kgf*m, 79.6 - 94.0 lb*ft) Warning Be careful not to damage the wheel nuts when removing the wheel and tire.