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NHTSA ID Number: 10117402

Manufacturer Communication Number: NTB17-034b

TSB/Document Date: 2017-09-14


Summary

2014 SENTRA AND 2017 SENTRA; CVT JUDDER AND/OR P0746/P0965 STORED This bulletin has been amended. Changes have been made on pages 2, 3, 9, 17, 23, 34, 35, 43, 44, 45, 83, 86 and 89 through 126. Please discard previous versions of this bulletin.


Clean the magnets.

Clean the CVT oil pan.

Reinstall the magnets to the oil pan in
their original positions.

3 bolts

11. Remove the three (3) strainer bolts, and
then remove the strainer from the valve
body.

These bolts will be reused.

Strainer
Figure 5B
9/128

NTB17-034b

Nut and washer
12. Remove the nut and washer, and then
remove the manual plate shown in Figure
6B.

Use a screwdriver to hold the manual
plate (Figure 7B) to keep the shaft
from rotating while removing the nut.

Manual plate

Do not discard nut and washer. These
will be reused during assembly.
Figure 6B

Manual plate

Figure 7B
13. Clean around the CVT unit harness
connector to prevent foreign materials
from entering into the CVT case.
14. Remove ONLY the eleven (11) valve
body bolts with markings as shown in
Figure 8B.

Do NOT remove the bolts with a
single dot over the “7”.

The bolts removed will be reused.

15. Press the CVT unit harness connector
down into the transaxle case, and then
remove the valve body from the transaxle
case.

Valve body
bolts
Figure 8B
Correct bolt

CAUTION: Do not damage the CVT unit harness connector.

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NTB17-034b

CVT Belt Visual Inspection

1. Secure the front right tire with a suitable
strap.

This will assist in making the belt turn
during the borescope belt inspection
step.

2. Mark the front left tire with a suitable
marking.

This will assure all 360° of the belt is
inspected.
Figure 1C

3. Using the steps on pages 12-17 inspect the entirety of the two sides of the belt that
come in contact with the pulleys (see Figure 2C):
IMPORTANT:
 Reference the pictures on pages 18-21 for comparison.
 Use borescope J-51951 with mirror attachment.
 Be sure to remove the protective film from the mirror before the first use.
 Clean the camera lens and mirror before each inspection. Use 90% isopropyl
alcohol, and a lens swab from Lens Swab packet J-51963 listed in PARTS
INFORMATION.
 Before inspecting, make sure the camera handle’s AA batteries are fresh and the
LCD monitor’s battery is charged.

Inspect these sides

Do not inspect
these sides

Figure 2C: New belt
11/128

NTB17-034b

a. Install the Clutch Engagement Tool (J-52273) to the CVT case with two bolts where
shown in Figure 3C finger tight.

Bolt torque not to exceed: 2.26 N•m (0.23 kg-m, 20 in-lb.)
CAUTION:
 Do not over torque the bolts. The threads are easily damaged.
 Make sure an O-ring is installed to the Clutch Engagement Tool (J-52273)
before installation.

NOTE: The O-ring for the Clutch Engagement Tool comes with the attachment. To
obtain only the O-ring, refer to PARTS INFORMATION for the part number.

Front of
vehicle

Clutch Pack

Clutch
Engagement
Tool (J-52273)

Figure 3C

b. Connect the Hand pump from Evap
Pressure Test Kit (J-42909) to the
Clutch Engagement Tool (J-52273)
and pump to 20 PSI.

Bolts

Hand pump

IMPORTANT:

Proper pressure has been
achieved when the CVT belt
moves while the left front wheel
is rotated and the vehicle is in
NEUTRAL with the right front
wheel secured.

Do NOT over pressurize the
system as internal damage to
the CVT could result.

Figure 4C

Hand pump should be removed from the Clutch Engagement Tool (J-52273)
quick connect once the clutch has been engaged and the belt is observed
moving with tire rotation.
 Pressure will be retained.

12/128

NTB17-034b

c. Insert the borescope where shown in Figure 5C as follows:
I.

Face the mirror of the borescope toward the driver’s side of the vehicle (CVT
side cover).

II.

Insert the lens approximately 7.5 inches from the CVT oil pan gasket surface
as shown in Figure 6C on page 14.

III.

And then view the side of the belt that contacts the pulley.

Look through here to
help guide borescope
Front of
vehicle

Insert borescope
here at location 1

Belt

Driver’s
side

Insert borescope
here
Face the mirror in the
direction indicated by
the yellow arrow
Figure 5C

13/128

NTB17-034b

Shown removed from the
vehicle and without side
cover for clarity, and is for
reference only

View point is on
opposite side of belt

Borescope

7.5 inches
Borescope position,
inserted from bottom

Figure 6C
d. Using the mark applied to the left front
tire for reference, slowly and carefully
rotate the front left tire one full turn in
either direction to view all of the belt.

Holding the borescope (camera
flexible tube) with one hand allows
rotation of the tire with the other
hand (see Figure 7C).

If evidence of belt slip is identified
as shown on pages 18-21, skip to
step 5 on page 22.

If the belt does not move when
rotating the front left tire, return to
step 3b on page 12.
Figure 7C

e. If the inspection result confirms that no slippage has occurred on the observed side,
inspect the other side of the belt as follows:
I.

Print page 15 and then shape the borescope camera flexible tube like the image
in Figure 8C.

14/128

NTB17-034b

For the following steps print this
page as a template to adjust
the borescope camera flexible
tube to match.

Do not shrink or enlarge
sheet size when printing.

Figure 8C: Template for
borescope camera flexible tube
is shown actual size.

New picture
Figure is 9
inches long

4 inches

15°
Camera view
 Face the mirror in the
direction of the yellow arrow.
Figure 8C

15/128

NTB17-034b

II.

Face the mirror of the borescope toward passenger side (Engine side).

III.

Insert the borescope in the second location where shown in Figure 9C.

IV.

Insert the lens approximately 8.7 inches from the CVT case rim as shown in
Figure 10C on the next page.

V.

And then view the side of the belt that contacts the pulley.

Front of
vehicle

Insert borescope at
location 2 and also look
through here to help guide
borescope

Passenger
side

Insert borescope
here

Face the mirror in the
direction indicated by
the yellow arrow

Belt

Figure 9C

16/128

NTB17-034b

Shown removed from the
vehicle and without side
cover for clarity, and is for
reference only

Borescope

View point

Borescope position,
inserted from bottom
8.7 inches

Figure 10C
f. Using the mark applied to the left front tire for reference, slowly and carefully rotate
the front left tire one full turn in either direction to view all of the belt.

Holding the borescope (camera flexible tube) with one hand allows rotation of the
tire with the other hand (see Figure 7C).
IMPORTANT: If the belt does not move when rotating the front left tire, supply
additional air with hand pump (J-45664) to re-engage the clutch as necessary.

Look for evidence of belt slip as shown on pages 18-21.

g. Remove the Clutch Engagement Tool (J-52273) from the CVT.
CAUTION: The remaining CVT fluid may spray when the Clutch Engagement Tool is
removed. Place a rag over the Clutch Engagement tool and SLOWLY loosen the two
bolts until the audible depressurization is noted.

h. Is the inspection result OK (no evidence of slip) for 360° rotation of both sides of the
belt?
YES: Go to step 4 on page 22 (No Belt Damage).
NO: Go to step 5 on page 22 (Belt Damaged).

17/128

NTB17-034b

Figure 11C New belt

Figure 12C:

18/128

NTB17-034b

Pictures in Figure 13C and 14C were taken with borescope J-51951.
OK
OK

Visual
lineslines
Visual

Figure 13C: Belt is OK

OK
OK

Visual
lineslines
Visual

Figure 14C: Belt is OK
19/128

NTB17-034b

NG

Scuffing

Figure 15C: Example of NG belt

NG

Lines
“smeared”

Figure 16C: Example of NG belt

20/128

NTB17-034b

Pictures in Figure 17C-19C were taken with borescope J-51951

NG

Figure 17C: Example of NG belt

NG

Figure 18C: Example of NG belt

NG

Figure 19C: Example of NG belt
21/128

NTB17-034b

No Belt Damage – Only Valve Body is Replaced

4. Install a new valve body in the reverse order of disassembly:

Refer to Install the Valve Body and Oil Pan on page 80.

And then,
a. Connect both battery cables, negative cable last.
b. Reset/reinitialize systems as needed.

Refer to the ESM, section PG – Power Supply & Ground Elements, for a
listing of systems that require reset/initialization after reconnecting the 12V
battery.

Look in the PG section index for ADDITIONAL SERVICE WHEN REMOVING
BATTERY NEGATIVE TERMINAL.

This list often includes items such as radio, power windows, clock, sunroof,
etc.

IMPORTANT:
c. Perform ADDITIONAL SERVICE REQUIRED starting on page 94.

Belt Damaged

5. Install the original (removed) oil pan
gasket and oil pan temporarily with at
least two oil pan bolts, hand tight.
IMPORTANT: DO NOT discard the
remaining oil pan bolts. These bolts will
be re-used.

Figure 20C

6. Replace the belt and pulley sub-assembly and valve body.

Go to Remove CVT from the Vehicle and Dissemble External Parts on the next
page.

22/128

NTB17-034b

Remove CVT from the Vehicle and Dissemble External Parts

1. Remove the CVT from the vehicle.

Refer to the ESM, section TM – Transaxle & Transmission for CVT removal.

2. Put the CVT assembly on a work bench
with the oil pan side down.
CAUTION: Take care not to damage the
oil pan.
Torque converter

3. Remove the torque converter.

The torque converter will be reused
during reassembly.

Figure 1D

4. Drain the CVT fluid out of the torque
converter.

Figure 2D

23/128

NTB17-034b

5. Remove the output speed sensor, primary speed sensor and secondary speed sensor
from the CVT (Figure 3D).

These sensors will be reused.

Inspect all three sensors for debris on the magnet and clean as necessary.

6. Remove the O-rings from all three speed sensors.

Discard the removed O-rings. These will be replaced during reassembly.

Primary speed sensor

Secondary speed sensor

Figure 3D

Output speed sensor

24/128

NTB17-034b

Remove the Oil Filter

1. Remove the oil filter from the CVT case
as follows:

Oil filter cover bolt

a. Remove the oil filter cover bolt.

This bolt will be reused.

Oil filter cover
Figure 1E
Locking tab
b. Rotate the oil filter cover
counterclockwise approximately 15
degrees or until the cover clears the
locking tab.

c. Pull the oil filter cover away from the
CVT case to remove.

Figure 2E
2. Pull the oil filter with grommet away from the CVT case to remove.

Discard the removed filter with grommet (non-reusable).

NOTE: Grommet may separate from the filter and remain on the CVT case.

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TSB/Document ID: NTB17-034b

Replacement Service Bulletin Number:

MFR Communication Date: 2017-08-14

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: POWER TRAIN:AUTOMATIC TRANSMISSION

MFR Component System:

MFR Component Subsystem:


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