Classification:

Reference:

AT18-009C

Date:

NTB18-077C

June 22, 2021

MIL ON WITH DTC P0776, P1715
AND MAY HAVE HESITATION AND/OR LACK OF POWER
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.

APPLIED VEHICLES:

2017-2018 Sentra Turbo (B17)

MR16DDT
APPLIED ENGINE:
APPLIED TRANSMISSION: CVT (RE0F10D)

IF YOU CONFIRM
The MIL is ON with DTC P0776 (PC SOLENOID B – Pressure Control Solenoid “B”
Performance/Stuck OFF) stored.
NOTE:


If P0744, P0746, P0841, P0965, P2813, or P17F0 are stored this bulletin does not
apply. Refer to ASIST for diagnostic assistance.



With this incident, if it should occur, P1715 (INPUT SPEED SENSOR) may be
stored with DTC P0776. The vehicle may also hesitate and/or have reduced power.

ACTION
1. Refer to the Repair Flow Chart on page 2 for mechanical CVT repair.
2. If needed, reprogram the TCM.


Refer to step 30 in the TCM Reprogramming section (page 21) of the SERVICE
PROCEDURE to confirm if reprogramming is needed.

3. Perform Additional Service (page 19).

IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you
will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it
contains information that is essential to successfully completing this repair.
Nissan 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 Nissan dealer to determine if this applies to your vehicle.
1/35

Repair Flow Chart
A.

MIL ON with DTC P0776 stored
NOTE: P1715 may also be stored, and the
vehicle may hesitate
and/or have reduced power

Evidence of
CVT belt slippage

Remove the control
valve (valve body),
inspect the CVT belt

Replace the
CVT assembly
See page 35
for important
pre-authorization
information

The CVT belt
checks out OK

Replace the
valve body

Reprogram the TCM
(Reprogramming, if needed,
must be done before performing
Additional Service.)

Perform Additional Service
(See page 19)
(Additional Service must be
performed for valve body
replacement or transaxle
replacement.)

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NTB18-077C

SERVICE PROCEDURE

Control Valve (Valve Body) Removal and CVT Belt Inspection

1. Write down all radio station presets.
Presets
AM
FM 1
FM 2
SAT 1
SAT 2/3
Bass

1

Treble

2

3

Balance

4

Fade

5

6

Speed Sen. Vol.

2. Disconnect both battery cables, negative cable first.

3. Remove the valve body.


Before lifting the vehicle, place the transmission gear selector in Neutral.



For valve body removal, refer to the Electronic Service Manual (ESM), section
TRANSMISSION & DRIVELINE > TRANSAXLE & TRANSMISSION > CVT:
RE0F10D > REMOVAL AND INSTALLATION > CONTROL VALVE.
NOTE: The number ‘7’ is on the head of all bolts that need to be removed for valve
body removal. Do not remove any bolt that does not have the number ‘7’.
CAUTION: Never allow any chemicals or fluids other than NS-3 CVT fluid or
equivalent to enter the CVT assembly. Never allow any foreign debris, dust,
dirt, etc. to enter the CVT assembly.



For additional information, see video # 544: “CVT Belt Inspection”. This video is
located under the TECH TRAINING GARAGE VIDEOS tab in Virtual Academy.

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NTB18-077C

Exploded View

(Total of 9 bolts)

Figure 1
1.

Transaxle assembly

2.

Terminal cord assembly

3.

CVT fluid temperature sensor
bracket

4.

Control valve

5.

Bracket

6.

O-ring

7.

New-style oil strainer assembly

8.

Old-style oil strainer assembly

9.

Oil pan gasket

10.

Oil pan

11. Drain plug

13.

Magnet

14. Spring washer

15. Manual plate

16.

Lip seal

17. Snap ring

18. Overflow plug

19.

O-ring

12. Drain plug gasket

: Always replace after every disassembly.
: Nꞏm (kg-m, ft-lb)
: Nꞏm (kg-m, in-lb)
4/35

NTB18-077C

4. Secure the front right tire with a suitable
strap, so it cannot rotate.


This will assist in making the belt
turn.

5. Mark the front left tire with a suitable
marking.


This will assure all 360° of the belt is
inspected.
Figure 2

6. Using borescope J-51951 with its mirror
attachment, inspect the entirety of the
two sides of the belt that come in contact
with the pulleys (see page 7, Figure 8).


Belt
Pulley
Case

Reference the Figures on pages 9
through 12 for comparison of an OK
and NG belt condition.

NOTE:
 Be sure to remove the protective film
from the mirror before the first use.


Step 6a

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 the PARTS INFORMATION
on page 32.
 Before inspecting, make sure the
camera handle’s AA batteries are
charged and the LCD monitor’s
battery is charged.

Step 6d

Figure 3

Camera
flexible tube
Front

a. Insert the camera lens between the
CVT case and pulley where shown in
Figure 3 and Figure 4.


Insert the lens approximately
seven (7) inches, and then view
the side of the belt that contacts
the pulley.

5/35

Figure 4

NTB18-077C

b. Slowly and carefully turn the front left
tire one full turn in the forward
rotation to view all of the belt.


Holding the borescope with one
hand allows for turning the tire
with the other hand
(see Figure 5).

CAUTION: If the tire is rotated in the
rearward rotation, the camera lens
may get caught between the belt and
pulley.

Figure 5

c. Was damage found?
 YES: Skip to step 6f.
 NO: Proceed to step 6d.
Pulley
Front

d. Inspect the other side of the belt.


Insert the camera lens in the
second location where shown
in Figure 3 and Figure 6, and then
perform step 6b again.

e. Was damage found?
 YES: Continue to step 6f.
 NO: Proceed to step 10 on
page 13 and replace valve
body.

Figure 6

NOTE: For additional information, see video # 544: “CVT Belt Inspection”. This video
is located under the TECH TRAINING GARAGE VIDEOS tab in Virtual Academy.

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NTB18-077C

f. If CVT replacement is required based
on the inspection results from 6b and
6d, use borescope J-51951 to record
a continuous video, 15 seconds or
less, of the most severe evidence of
belt slip and the VIN on the
F.M.V.S.S. certification label (VIN
label). See Figure 7.

VIN
label

Figure 7
NOTE: This required video must be attached to the Powertrain Call Center CVT
Preauthorization Form (in ASIST) prior to calling for authorization. Failure to submit
a continuous video will cause immediate denial of request for replacement.




Before starting to record, make sure the camera handle’s AA batteries are
charged and the LCD monitor’s battery is charged.
The video will show a backward or reversed image when the mirror end is used;
this is okay.
The required video must show clear evidence of belt slippage and be 15 seconds
or less.

Inspect these sides

Do not inspect
these sides

Figure 8
7. Reassemble the CVT.
NOTE: The CVT unit requiring replacement will need to be reassembled for Nissan
parts return/collection.
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NTB18-077C

8. Obtain authorization to replace the CVT assembly. See CVT Assembly Replacement
Approval Procedures on page 35.

9. After receiving authorization, replace the CVT assembly, then proceed to page 20 to
reprogram the TCM, and then perform Additional Service when Replacing Transaxle
Assembly. Additional information related to TCM reprogramming is found on page 19.


For CVT assembly replacement, refer to the ESM, section TRANSMISSION &
DRIVELINE > TRANSAXLE & TRANSMISSION > CVT: RE0F10D > UNIT
REMOVAL AND INSTALLATION > TRANSAXLE ASSEMBLY.
 IMPORTANT: For those vehicles that have an external CVT cooler, a cooler
flush is required after a valve body or CVT assembly replacement.
o For the procedure to flush the CVT cooler, refer to the ESM, section
TRANSMISSION & DRIVELINE > TRANSAXLE & TRANSMISSION > CVT:
RE0F10D > BASIC INSPECTION > CVT FLUID COOLER SYSTEM.



For the procedure to fill CVT with NS-3 CVT fluid or equivalent, refer to the ESM,
section TRANSMISSION & DRIVELINE > TRANSAXLE & TRANSMISSION > CVT:
RE0F10D > BASIC INSPECTION > CVT FLUID.

8/35

NTB18-077C

A.

Figure 9: New belt

Figure 10: Close-up of section to be inspected

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NTB18-077C

Pictures in Figure 11 and Figure 12 were taken with borescope J-51951.

OK

Visual
lines

Figure 11: Belt is OK

OK

Visual
lines

Figure 12: Belt is OK
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NTB18-077C

NG

Scuffing

Figure 13: Example of NG belt

NG

Lines
“smeared”

Figure 14: Example of NG belt

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NTB18-077C

A.

Pictures in Figure 15-Figure 17 were taken with borescope J-51951.

NG

Figure 15: Example of NG belt

NG

Figure 16: Example of NG belt

NG

Figure 17: Example of NG belt
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NTB18-077C

New Control Valve (Valve Body), Strainer and Pan Installation
IMPORTANT:


For those vehicles that have an external CVT cooler, a cooler flush is required after
a valve body or CVT assembly replacement.
 For the procedure to flush the CVT cooler, refer to the ESM, section
TRANSMISSION & DRIVELINE > TRANSAXLE & TRANSMISSION > CVT:
RE0F10D > BASIC INSPECTION > CVT FLUID COOLER SYSTEM.



Installation steps in this bulletin may contain different style parts than what were
originally installed in the CVT. Pay careful attention, REASSEMBLY MAY NOT BE
IDENTICAL TO DISASSEMBLY.



Confirm that the QR label, control valve and CD part numbers all match before
installing the control valve.



For additional information, see video # 547: “CVT Belt and Pulley Replacement” and
fast forward to minute marker 20:09. This video is located under the TECH
TRAINING GARAGE VIDEOS tab in Virtual Academy.

CAUTION: Handle the valve body carefully.

NOTE: If an oil strainer bracket was
removed, discard it. An oil strainer bracket
(Figure 18) will not be used with the new oil
strainer.
Oil strainer
bracket

Figure 18

10. Install a new lip seal (Figure 19).
