Classification:

Reference:

AN21-015A

Date:

NTB21-066A

August 9, 2021

VOLUNTARY SERVICE CAMPAIGN
2021 SENTRA; AUDIO CONTROL UNIT REPROGRAM
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.

CAMPAIGN ID #:
APPLIED VEHICLES:

PM991
2021 Sentra (B18) – SV and SR only

Check Service COMM or Dealer Business Systems (DBS)
National Service History to confirm campaign eligibility.

INTRODUCTION
Nissan is conducting this voluntary service campaign, on certain specific model year 2021
Sentra SV and SR vehicles, to reprogram the Audio Control Unit. This service will be
performed at no charge to the customer for parts or labor.

IDENTIFICATION NUMBER
Nissan has assigned identification number PM991 to this campaign. This number must
appear on all communication and documentation of any nature dealing with this campaign.

DEALER RESPONSIBILITY
Dealers are to repair vehicles falling within range of this campaign that enter the service
department. This includes vehicles purchased from private parties, vehicles presented by
transient (tourists) owners, and vehicles in a dealer’s inventory.

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.

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REPAIR OVERVIEW

Was the vehicle towed in for a no crank/no start condition,
OR
Does the customer concern involve a no crank/no start condition?
NO

YES

Test the battery using the Midtronics DSS5000P NI.
Battery Test Result?
Step 2
Good
Battery

Charge
and Retest

Replace
Battery

Charge and
Retest Battery
Good
Battery

Battery Test
Result?
Step 3
Replace
Battery

Perform the
Audio Control
Unit Reprogram
Step 5

1. E-mail the battery test result
to Nissan for validation.
2. Replace the battery.
NOTE: The replaced battery
may be requested to be
returned through the
warranty parts return
process.

Repair Complete

Step 4

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REQUIRED SPECIAL TOOL


One special tool, USB drive J-52727-1, has been shipped to each dealer (Figure 1).



Do not use any other USB drive to perform the procedure in this bulletin.



Additional USB drives may be purchased from Tech•Mate: nissantechmate.com or
1-800-662-2001.

HINT: The update-software must be the only file on the drive.

Figure 1

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SERVICE PROCEDURE

1.

Was the vehicle towed in for a no crank/no start condition, or does the customer
concern involve a no crank/no start condition?


If YES, proceed to step 2.



If NO, skip to step 5 on page 6.

Test the Battery
2.

3.

Test the vehicle's 12 volt battery using the Midtronics DSS-5000P NI.


If the battery test result is Charge and Retest, proceed to step 3.



If the battery test result is Replace Battery, skip to step 4 on page 5.



If the battery test result is Good Battery, skip to step 5 on page 6.

Charge and retest the battery.


If the battery test result is Replace Battery, proceed to step 4 on page 5.



If the battery test result is Good Battery, skip to step 5 on page 6.

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4.

If the battery test result is Replace
Battery, email the battery test result to
FQABatterySupport@nissan-usa.com,
using the Midtronics DSS-5000P NI.
a. Select Send Results.
b. Select Email.

Figure 2
c. Input [email protected].
d. Select the send email icon button.
Email Address: FQABatterySupport@nissan-usa.com

e. Replace the battery.

NOTE:


The submitted battery test result
will be reviewed.



The replaced battery may be
requested to be returned through
the warranty parts return process.

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Figure 3

NTB21-066A

Check Software Version
5.

Select Settings, located in the lower
right hand corner of the AV unit
display shown in Figure 4.

Figure 4
6.

Select Info.

Figure 5

7.

Select System Information.

Figure 6

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NTB21-066A

8.

Select Version Information.

Figure 7

9.

Verify the Software Version is 321 or
420.


If the software version is 321 or
420, proceed to step 10 on page 8.



If the software version is not 321 or
420, the service procedure is
complete.
NOTE: Further diagnostic may be
needed that is not covered by this
bulletin. Refer to the appropriate
section of the Electronic Service
Manual (ESM).

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Figure 8

NTB21-066A

Download Software from the Infotainment Downloader Tool
IMPORTANT: Before starting, make sure:

10.



The CONSULT PC is connected to the internet.



ASIST has been synchronized (updated) to the current date.

Insert special tool USB drive J-52727-1 into the CONSULT PC.


If the update-software has already been downloaded onto special tool USB drive
J-52727-1 from a prior service procedure, skip to step 19 on page 10.
HINT:
 Special tool USB drive J-52727-1 is the only USB drive approved for use with
this procedure.
 The update-software must be the only file on the USB drive.
 The update-software is estimated to take 10-15 minutes to download to the
USB drive.
 The update-software only needs to be downloaded once and can then be used
continuously on multiple Applied Vehicles.

11.

Open ASIST.

12.

Select Specialty Tools, and then select Infotainment Software Updates.

Specialty Tools
Infotainment Software Updates

Figure 9

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13.

Select the check box next to infotainment update-software PM991_SENTRA
(Figure 10).

14.

Use the drop-down menu and select the location of the USB drive that was inserted in
step 10.

Version:

Check
box
D:\

USB drive
location

PM991_SENTRA

Drop-down
menu

Infotainment
update-software

Figure 10
15.

Select Download, and then wait for the download to complete.
HINT: The update-software is estimated to take 10-15 minutes to download to the
USB drive.

16.

Select OK when the message in Figure 11 is displayed.

Figure 11

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17.

Once the transfer is complete, safely remove the USB drive from the CONSULT PC.
a.

From the PC toolbar, select the Safely Remove Hardware icon.


b.

The icon is on the toolbar, or can be found after selecting the arrow.

Select the USB drive to be removed, and then remove the USB drive from the
CONSULT PC.
Follow the steps to safely remove the USB drive. If not followed, the USB drive
may corrupt the infotainment update-software.


If you are not familiar with the process of safe USB drive removal, ask for
assistance at your dealer.

Safely Remove
Hardware icon

USB Drive (E:)

Arrow on toolbar

Figure 12
18.

Close all ASIST Infotainment Software Update screens.

Reprogram the Audio Control Unit
19.

Set the parking brake.

20.

Start the engine, and then wait 60 seconds for the system to load.
HINT: The engine needs to idle for the duration of the update to retain battery charge.

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21.

Insert the USB drive with the
infotainment update-software into the
vehicle’s USB media port (Figure 13).


Do not remove the USB drive
during the update to the vehicle
until instructed to.
USB Media port

Figure 13

22.

Wait approximately 10-30 seconds for
the screen in Figure 14 to appear,
and then select OK.

Figure 14



If the screen in Figure 15 is
shown, select No.

Figure 15

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23.

Review the software update
requirements, shown in Figure 16,
and then select Accept to start the
reprogramming.

Figure 16

24.

When the message shown in Figure
17 is displayed, remove the USB drive
from the USB media port.
Do not remove the USB
drive until Figure 17 is displayed. If
removed prior to this screen being
displayed, the Audio Control Unit may
be damaged.

25.

Turn the ignition OFF.
Figure 17

26.

Open and close the driver door.

27.

Restart the engine.

28.

Allow the system to boot up
completely (approximately 30
seconds).


The Nissan logo will be displayed
during the reboot (Figure 18).

Figure 18

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Confirm Software Version
29.

Select Settings, located in the lower
right hand corner of the AV unit
display shown in Figure 19.

Figure 19

30.

Select Info.

Figure 20

31.

Select System Information.

Figure 21

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32.

Select Version Information.

Figure 22

33.

Verify the Software Version is now
423.




If the software version is NOT 423,
start this procedure over and verify
that the correct software shown in
step 13 on page 9 is downloaded.

423

If the software version is 423, the
reprogramming is complete.

Figure 23

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PARTS INFORMATION

(1)

DESCRIPTION

PART NUMBER

Battery (1)

999M1-NBH5A

QUANTITY
1
(If Needed)

Order this item through the Nissan Maintenance Advantage program: Phone 877-NISNMA1 (877-647-6621). Website order via link on the dealer portal; www.NNAnet.com
and click on the “Maintenance Advantage-Tire/Battery/Chemical” link.

CLAIMS INFORMATION
Submit a “CM” line claim using the following claims coding:
CAMPAIGN (“CM”)
ID

DESCRIPTION

OP CODE

FRT

PM9910

0.3

PM991

Reprogram Audio Control Unit
Test and Recharge Battery,
and Reprogram Audio Control Unit
Test, Recharge, and Replace Battery,
and Reprogram Audio Control Unit

PM9914

0.5

PM9913

0.8

AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
July 26, 2021

NTB21-066

August 9, 2021

NTB21-066A

DESCRIPTION
Original bulletin published
Changes made to page 2 and page 5

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NTB21-066A