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NHTSA ID Number: 10109251

Manufacturer Communication Number: NTB17-034

TSB/Document Date: 2017-08-01


Summary

2017 SENTRA; CVT JUDDER AND/OR P0746/P0965 STORED IF YOU CONFIRM The customer reports a transmission judder (shake, shudder, single or multiple bumps or vibration), hesitation on acceleration, lack of power or RPM flare. AND/OR One of these DTCs is stored. - P0746 (PRES CNT SOL/A FCTN (L/PRESS SOL/FNCTN)) - P0965 (PRESSURE CONTROL SOLENOID B) ACTION - Refer to the Repair Overview on page 2. CAUTION: Always handle the CVT and component assemblies carefully.


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
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NTB17-034

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.

10/108

NTB17-034

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 boroscope 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
11/108

NTB17-034

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

Bolts

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

Evap Tester

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

Evap Tester 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.

12/108

NTB17-034

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

Face the mirror of the boroscope 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 boroscope
Front of
vehicle

Insert boroscope
here at location 1

Belt

Driver’s
side

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

13/108

NTB17-034

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 boroscope camera flexible tube like the image
in Figure 8C.

14/108

NTB17-034

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

15/108

NTB17-034

II.

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

III.

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

Passenger
side

Insert borescope
here

Face the mirror in the
direction indicated by
the yellow arrow

Belt

Figure 9C

16/108

NTB17-034

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 boroscope (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.

IMPORTANT: If the belt does not move when rotating the front left tire, supply
additional air with Evap Tester (J-45664) to re-engage the clutch as necessary.

g. Is the inspection result OK (no evidence of slip) for 360° rotation of both sides of the
belt?
YES: Remove the Clutch Engagement Tool (J-52273) from the CVT case and then
proceed to step 4 on page 22.
NO: Remove the Clutch Engagement Tool (J-52273) from the CVT case and then
skip to step 5 on page 22.

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.

17/108

NTB17-034

Figure 11C New belt

Figure 9C:

18/108

NTB17-034

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
19/108

NTB17-034

NG

Scuffing

Figure 15C: Example of NG belt

NG

Lines
“smeared”

Figure 16C: Example of NG belt

20/108

NTB17-034

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
21/108

NTB17-034

No Belt Damage – Only Valve Body is Replaced

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

Refer to the Electronic Service Manual (ESM), section TM – Transaxle
&Transmission for CVT removal.

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 WHEN REPLACING TRANSAXLE ASSEMBLY
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, valve body.

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

22/108

NTB17-034

Remove CVT from the Vehicle and Dissemble External Parts

1. Remove the CVT from the vehicle.

Refer to the Electronic 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

23/108

NTB17-034

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

24/108

NTB17-034

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.

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TSB/Document ID: NTB17-034

Replacement Service Bulletin Number:

MFR Communication Date: 2017-04-26

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: POWER TRAIN

MFR Component System:

MFR Component Subsystem:


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