Classification:

Reference:

AT14-017d

Date:

ITB15-010d

October 31, 2019

INFINITI; PROCEDURE TO CLEAN
CVT TRANSMISSION FLUID COOLERS
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.

APPLIED VEHICLES:

2013 JX (L50) - Built after 5N1AL0M(*)(*)DC 343902 // March 26, 2013
2014-2020 QX60 (L50) - V6 engine only

APPLIED TRANSMISSION: CVT

IMPORTANT: Metal debris and friction material may become trapped in the radiator, cooling hoses, bypass
valve or external CVT fluid cooler. This debris can contaminate the newly serviced transmission, control valve
or torque converter. In severe cases this debris can block or restrict flow and may cause damage to the newly
serviced CVT.

SERVICE INFORMATION
When a CVT, control valve, or torque converter replacement is necessary for one of the applied vehicles, the
CVT transmission fluid coolers (radiator based fluid cooler and external auxiliary cooler if present) must be
flushed.

Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained
individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe
that a described condition may apply to a particular vehicle, DO NOT assume that it does. See your Infiniti retailer to determine if this
applies to your vehicle.

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SERVICE PROCEDURE
Flushing Radiator based CVT Transmission Fluid Cooler
IMPORTANT: The CVT fluid cooler hoses will be
flushed in both directions in the following procedures.
1. Place the vehicle on a lift and remove the left front
wheel.
2. Partially remove the left front fender protector to
gain access to the CVT fluid cooler.


Refer to the Electronic Service Manual (ESM),
section EXT – Exterior or BODY EXTERIOR,
DOORS, ROOF & VEHICLE SECURITY >
EXTERIOR -> REMOVAL AND
INSTALLATION > FENDER PROTECTOR >
FENDER PROTECTOR > Removal and
Installation.

Two (10 mm head) bolts attach bypass valve to
the fluid cooler. The other bolt is on the
opposite side of bypass valve.

Figure 1

3. Place an oil drain pan under the CVT fluid cooler.
4. Unbolt and disconnect the external CVT fluid cooler bypass valve from the external CVT fluid cooler
(Figure 1).
5. Disconnect the CVT fluid cooler inlet and outlet rubber hoses from the CVT oil warmer (Figure 2) and
discard spring clamps.
NOTE: If rubber material from a cooler hose remains on the steel tube or fitting, replace the rubber hose
and clean the steel tube.
6. Allow any NS-3 fluid that remains in the CVT fluid cooler hoses to drain into the oil drain pan.

CVT fluid warmer to
CVT fluid cooler hose

CVT fluid warmer

CVT fluid warmer
to radiator hose

To radiator
CVT fluid
cooler

CVT fluid cooler

To radiator CVT
fluid cooler

Figure 2
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ITB15-010d

CAUTION:
 Wear safety glasses and rubber gloves when
spraying the Transmission Cooler Cleaner.
 Spray Cooler Cleaner only in areas with
adequate ventilation.
 Avoid contact with eyes and skin.
 Do not breathe vapors or mist from spray.

Fluid outlet

Fluid inlet

NOTE: The two hoses that have been removed from
the CVT fluid warmer will be flushed first in one
direction and then the other.
CVT fluid cooler
bypass valve

7. Insert the “extension adapter hose”, from a can of
Transmission Cooler Cleaner (Infiniti P/N 999MPAM006P), into one or the other of the
disconnected CVT fluid cooler hoses (Figure 3).

Figure 3

8. While blocking the CVT fluid cooler bypass valve
fluid passage (Figure 3) with thumb:
a. Hold the hose and can as high as possible.
b. Spray Transmission Cooler Cleaner, in a
continuous stream, into the CVT fluid cooler
inlet hose.

Place thumb over this
fluid passage

c. Spray fluid until it flows out of the other hose
for 5 seconds.

9. Slide a piece of 5/8 inch hose (16 mm) over the
end of the CVT fluid cooler hose (Figure 4) that
was used as the flush inlet.

5/8 inch hose

10. Insert the tip of an air gun into the end of 5/8 inch
(16 mm) hose (Figure 4) and block the CVT fluid
cooler bypass valve fluid passage.
11. Blow compressed air, regulated to 5-9 kg/cm2 (70
– 130 PSI), through the CVT fluid cooler hose for
10 seconds to force out any remaining fluid.
12. Repeat steps 7 through 11 one additional time and
then proceed to step 13.
Figure 4

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ITB15-010d

13. Reverse the direction that the hoses are being flushed (Figure 3) and repeat steps 7 through 11 twice.


When complete, proceed to step 14.

14. Reassemble the CVT fluid cooler hoses to the CVT warmer with the new spring clamps listed in PARTS
INFORMATION on page 6 in the reverse order of disassembly.


For correct hose assembly and alignment, refer to the ESM, section TM – Transaxle & Transmission
or TRANSMISSION & DRIVELINE > TRANSAXLE & TRANSMISSION > CVT: [applicable CVT] >
REMOVAL AND INSTALLATION > CVT FLUID COOLER SYSTEM > Removal and Installation.

Flushing External CVT Transmission Auxiliary Fluid Cooler

1. Remove the CVT fluid cooler (auxiliary fluid cooler)
from vehicle.


Refer to the ESM, section
TM – Transaxle & Transmission
or TRANSMISSION & DRIVELINE >
TRANSAXLE & TRANSMISSION >
CVT: [applicable CVT] > REMOVAL AND
INSTALLATION > CVT FLUID COOLER
SYSTEM > Removal and Installation.

CVT fluid cooler

Figure 5
2. Remove the O-rings from auxiliary fluid cooler and
discard.
3. Install a 4 inch long hose with an inside diameter
of 5/8 inch (16 mm) onto the inlet side of the
auxiliary fluid cooler.
4. Install a 6 inch long hose with an inside diameter
of 5/8 inch (16 mm) onto the outlet of the auxiliary
fluid cooler and place the opposite end into a
suitable container to catch used fluid.

Outlet

Inlet

Figure 6

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ITB15-010d

5. Insert the “extension adapter hose” from a can of
Transmission Cooler Cleaner (Infiniti P/N 999MPAM006P) into the auxiliary fluid cooler inlet
(Figure 7).

Inlet

6. Spray one full can of Transmission Cooler Cleaner
through the inlet of the auxiliary fluid cooler, letting
cleaner drain through the outlet and into a
container.
7. Allow the remaining fluid in the auxiliary fluid
cooler to drain out.
Figure 7

8. Insert the tip of an air gun into the end of the
auxiliary fluid cooler inlet (Figure 8).
9. Wrap a shop rag around the air gun tip and end of
the cooler inlet (Figure 8).
10. Blow compressed air, regulated to 5-9 kg/cm2
(70 – 130 PSI), through the inlet side of the
auxiliary fluid cooler for 10 seconds to force out
any remaining fluid.

Figure 8
Suction gun

11. While holding the hoses securely to the auxiliary
fluid cooler (Figure 9), flush 2 full quarts of NS-3
(or equivalent) with a 1 pint suction gun.


Inlet

Flush from the inlet side of the auxiliary fluid
cooler through to the outlet.

12. Allow the remaining fluid in the auxiliary fluid
cooler to drain out.

Figure 9

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ITB15-010d

13. To complete the flush, insert the tip of an air gun again into the end of the auxiliary fluid cooler inlet
(Figure 8).
14. Wrap a shop rag around the air gun tip and end of the cooler inlet (Figure 8).
15. Blow compressed air, regulated to 5-9 kg/cm2 (70 – 130 PSI), through the inlet of the auxiliary fluid cooler
for 10 seconds to force out any remaining NS-3 fluid.
16. Reassemble the auxiliary fluid cooler and CVT fluid cooler bypass valve in the reverse order of disassembly
with the new O-rings listed in PARTS INFORMATION, below.


Refer to the ESM, section TM – Transaxle & Transmission or TRANSMISSION & DRIVELINE >
TRANSAXLE & TRANSMISSION > CVT: [applicable CVT] > REMOVAL AND INSTALLATION >
CVT FLUID COOLER SYSTEM > Removal and Installation.

PARTS INFORMATION
DESCRIPTION
Hose Spring Clamp
O-Rings (CVT Fluid Cooler)
Transmission Cooler Cleaner
NS-3 CVT Fluid

PART #
21639-7990A
22180-9NB0A
999MP-AM006P (1)
999MP-NS300P (1) (2)

QUANTITY
2
2
As needed
As needed

(1) Order this item through the Infiniti Maintenance Advantage Program, 1-877-INF-IMA1 (877-463-4621).
Website order via link on dealer portal www.NNAnet.com and click on the “Maintenance Advantage” link.
(2) For warranty repairs, Nissan NS-3 CVT Fluid must be used. For customer pay repairs, Nissan NS-3 CVT
Fluid or an equivalent must be used.

CLAIMS INFORMATION
With CVT Assembly Replacement on same repair line
Submit a Primary Part (PP) type line claim using the following claims coding:
OPERATION
Flush CVT Oil Cooler
(1) Use the PFP for the repair actually performed.

PFP
(1)

OP CODE
JX31AA

FRT
0.7

PFP
(1)

OP CODE
JX32AA

FRT
0.7

OR
With Valve body or Torque Converter Replacement on same repair line
Submit a Primary Part (PP) type line claim using the following claims coding:
OPERATION
Flush CVT oil cooler with valve body / torque converter replacement
(1) Use the PFP for the repair actually performed.

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ITB15-010d

AMENDMENT HISTORY
PUBLISHED DATE

REFERENCE

DESCRIPTION

March 12, 2015

ITB15-010

Original bulletin published.

September 9, 2015

ITB15-010a

APPLIED VEHICLES section revised

April 7, 2016

ITB15-010b

APPLIED VEHICLES section revised

April 24, 2017

ITB15-010c

APPLIED VEHICLES section revised

October 31, 2019

ITB15-010d

APPLIED VEHICLES and PARTS INFORMATION
sections revised

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ITB15-010d