.

i Information

C

The Combined Mode is necessary for
adequate cleaning.

C5.

Remove the underhood service interlock
connector (D).

i Information
If the vehicle lacks an under-hood service
interlock connector, the safety switch
above the battery must be removed. This
switch can be accessed under the carpet
in the trunk of the vehicle.

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D

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C6.

COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE AND COOLANT CHANGE
(SERVICE CAMPAIGN T9E)

To drain the coolant, remove the reservoir
tank cap (E) and drain the coolant inside the
tank outside using a javara hose.

E

i Information
The reservoir tank has two chambers,
upper and lower. Carefully feel for the
hole between the two halves to insert the
javara hose into the lower chamber.

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C7.

COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE
AND COOLANT CHANGE
`
(SERVICE CAMPAIGN T9E)

Coolant Discharge and Air Purging from
Cooling System Circuits
To ensure the hoses are securely connected
to the vehicle, follow these instrucitons:
EQUIPMENT

Red outlet hose

VEHICLE CONNECTION POINT

Blue inlet
Coolant tank inlet hose
hose
Red outlet
Coolant tank outlet hose
hose
1. Perform Air Drain for 2 minutes to
discharge and drain the coolant.
(Air ON, Pump OFF, Inlet Valve OFF)
2. Perform flush and filter cleaning
circulating coolant for 5 minutes.
(Air ON, Pump ON, Inlet Valve ON)
3. Perform Air Drain for 2 minutes to
discharge the coolant.
(Air ON, Pump OFF, Inlet Valve OFF)

Blue inlet hose

E

Coolant
tank outlet
(hose)

Coolant tank inlet
(hose)

0
C8.

Disconnect the inlet / outlet hoses of the
cleaning equipment from the vehicle's
reservoir tank.
Red outlet hose
Blue inlet hose

Keep the separated reservoir tank of the
vehicle aside for cleaning at a later stage.

Coolant
circulation
container

Coolant pump and
air pressurizer

Foreign material filter

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C9.

COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE AND COOLANT CHANGE
(SERVICE CAMPAIGN T9E)

Cleaning the EPCU - Motor - OBC Radiator Cooling Circuit

EPCU inlet
(nipple)

i Information

0

This cooling circuit requires thorough
cleaning in both directions with steps
C9, C11 and then C12 (repeats C9).

Radiator
outlet
(hose)

To ensure the hoses are securely connected
to the vehicle, follow these instrucitons:
EQUIPMENT

Blue inlet hose
Red outlet hose

VEHICLE CONNECTION POINT

Blue inlet
EPCU inlet nipple
hose
Red outlet
Radiator outlet hose
hose
1. Perform flush and filter cleaning
circulating coolant for 5 minutes.
(Air ON, Pump ON, Inlet Valve ON)
2. Perform Air Drain for 2 minutes to
discharge the coolant.
(Air ON, Pump OFF, Inlet Valve OFF)

Coolant
circulation
container

Coolant pump and
air pressurizer

Foreign material filter

C10. While the cleaning equipment is in operation,
remove the reservoir tank to clean the
residual coolant and debris inside.

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SUBJECT:

SUBJECT:

COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE
AND COOLANT CHANGE
`
(SERVICE CAMPAIGN T9E)

C11. Swap the equipment hoses in the opposite
direction from that of step C9.
To ensure the hoses are securely connected
to the vehicle, follow these instrucitons:
VEHICLE CONNECTION
EQUIPMENT
POINT
Blue inlet
Radiator outlet hose
hose
Red outlet
EPCU inlet nipple
hose
1. Perform flush and filter cleaning
circulating coolant for 5 minutes.
(Air ON, Pump ON, Inlet Valve ON)
2. Perform Air Drain for 2 minutes to
discharge the coolant.
(Air ON, Pump OFF, Inlet Valve OFF)
C12. Swap back the equipment hoses and repeat
the cleaning and air draining process (as
done in step C9).
C13. Disconnect the hoses from the circulation
equipment, then reinstall the original hoses
back onto the vehicle.

Radiator
outlet
(nipple)

EWP inlet
(hose)

0

Red outlet hose

Circulation
outlet
(nipple)

Blue inlet hose

Coolant
circulation
container

Coolant pump and
air pressurizer

Foreign material filter

C14. Once the vehicle is lifted, remove the front /
rear undercover.

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COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE AND COOLANT CHANGE
(SERVICE CAMPAIGN T9E)

C15. Cleaning the Cooling Circuit Section for
Battery Chiller, Coolant Heater, and High
Voltage Battery
While the vehicle is lifted, connect the hoses
securely to vehicle and operate the
equipment as follows:
VEHICLE CONNECTION
EQUIPMENT
POINT
Blue inlet
Battery chiller outlet hose
hose
Red outlet
Battery inlet nipple
hose
1. Perform flush and filter cleaning
circulating coolant for 5 minutes.
(Air ON, Pump ON, Inlet Valve ON)
2. Perform Air Drain for 2 minutes to
discharge the coolant.
(Air ON, Pump OFF, Inlet Valve OFF)

Battery
chiller outlet
(hose)

Battery
inlet
(nipple)

0

Blue inlet hose
Red outlet hose

Coolant
circulation
container

Coolant pump and
air pressurizer

Foreign material filter

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COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE
AND COOLANT CHANGE
`
(SERVICE CAMPAIGN T9E)

C16. Remove the hoses of the circulation
equipment.
Reinstall the existing hoses of the vehicle.
Decide the next step:
VEHICLE OPTION

GO TO
NEXT STEP

Heat pump

➔ C17

Non-heat pump

➔ C19

C17. Cleaning the Cooling Circuit Section of
Waste Heat Chiller

Vehicle bottom view

i Information
Step C17 & C18 are only for the Heat
Pump Option.
While the vehicle is lifted, remove the heat
chiller inlet hose (F) from the bottom of the
vehicle and allow it to drain.

Waste heat chiller
outlet hose

F
Waste heat chiller
inlet hose removal

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SUBJECT:

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COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE AND COOLANT CHANGE
(SERVICE CAMPAIGN T9E)

C18. Cleaning the Cooling Circuit Section of a
Waste Heat Chiller — (ONLY for Heat
Pump Option)
While the vehicle is lifted, connect the hoses
securely to vehicle and operate the
equipment as follows:
EQUIPMENT

Waste heat
chiller intlet
(hose)

VEHICLE CONNECTION POINT

Blue inlet
Waste heat chiller inlet
hose
hose
Red outlet
Waste heat chiller outlet
hose
hose
1. Perform flush and filter cleaning
circulating coolant for 5 minutes.
(Air ON, Pump ON, Inlet Valve ON)
2. Perform Air Drain for 2 minutes to
discharge the coolant.
(Air ON, Pump OFF, Inlet Valve OFF)
Waste heat
chiller outtlet
(hose)

C19. Disconnect the hoses from the circulation
equipment of the vehicle and reinstall the
original hoses back to their original positions
on the vehicle.
C20. Reconnect the service interlock connector or
service safety switch that was previously
disconnected from the battery.

Blue inlet hose
Red outlet hose

C21. Once all hoses in the vehicle are confirmed
to be correctly installed, fill the reservoir tank
with the improved low-conductivity coolant
(BSC-2). Use the GDS-M system to perform
air bleeding for 30 minutes by circulating the
coolant through the EWP
Coolant pump and
air pressurizer

i Information
•
•

Coolant
circulation
container

Inject coolant into the reservoir tank
based on the optional specifications of
each model (~10 to 13 L).
After flushing a single vehicle, remove
the equipment filter and thoroughly
wash away any foreign substances.

TSB #: 23-01-049H

Foreign material filter

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SUBJECT:

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COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE
AND COOLANT CHANGE
`
(SERVICE CAMPAIGN T9E)

C22. Take a STUI photo of the coolant reservoir
bottle complete filled after the flushing
cleaning and coolant refill.

STUI
Please include the last 6 digits of the VIN
and date of repair on a piece of paper.
Ensure the VIN and date of repair are
clearly visible. Upload the photo to STUI.

C23. Start the engine and verify if the message
"Coolant supplement" or Inverter Coolant”
warning does not display.

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COOLING SYSTEM CIRCUIT DEBRIS DISCHARGE AND COOLANT CHANGE
(SERVICE CAMPAIGN T9E)

C24. Use an air gun to clean the filter and filter
case of the equipment, removing any foreign
substances:
1. Blow the filter from the inside to the
outside using the air gun.
2. Pay special attention to spraying air
between the filter gaps to remove
foreign substances effectively, as
there may be a significant buildup in
these areas.
3. Skipping this step may result in
decreased flow rate and reduced
cleaning effectiveness of the
equipment due to foreign substances
being stuck in the filter.

NOTICE
Use an air gun to inject air with precision
into the gaps of the filter's inner wall, as
sludge may be stuck there. Rotate the
filter to ensure even spraying.

TSB #: 23-01-049H

Page 27 of 27
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