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
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
- 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.
READ NEXT:
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 / 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:
Operating the fog lights (if
equipped)
Type A
Type B
Type C
Operation
Turn the fog light switch (1) to the
dedicated position.
Front: ( )
Rear: ( )
Operating condition(s)
The headlamps are turned ON.
CAUTION
When in operation, the fog lights consume
large am
Pressure Source Unit Repair procedures
Pressure Source Unit Components and components location
Warning
PSU (Presser Source Unit) must not be disassembled.
Pressure Source Unit (PSU)
Pressure Source Unit (PSU) connector
Motor
Filler adapter
Bracket
Accumulator
Remova
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