NTB22-038B

Classification:
Reference:
DA22-001B
Date:
NTB22-038B
June 20, 2023
RAB WARNING LIGHT ON IN INSTRUMENT PANEL
AND/OR DTC B2724-23 STORED
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.
APPLIED VEHICLES:
2019-2021 Altima (L34)
2019-2022 Murano (Z52)
2019-2021 Rogue Sport (J11)
2019-2021 Versa (N18)
APPLIED SYSTEMS:
Rear Automatic Braking (RAB)
IF YOU CONFIRM
The customer states the RAB warning light
information display,
is ON in the instrument panel’s
AND/OR
DTC B2724-23 (SONAR CONTROL UNIT - SONAR ECU INTERNAL FAILURE [UNDER
VOLTAGE]) is stored.
ACTION
Reprogram and configure the Sonar Control Unit using the SERVICE PROCEDURE in this
bulletin, if applicable.
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.
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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SERVICE PROCEDURE
Sonar Control Unit Reprogramming
IMPORTANT: Before starting, make sure:

All CONSULT-III plus (C-III plus) software updates (if any) have been installed.

The CONSULT PC is connected to the internet via a cable or Wi-Fi.
o Later in the procedure you will be required to enter your username and
password.
o If you do not know your username and password, contact your service
manager.

A screen print for warranty documentation can be done from the CONSULT PC
during this service procedure while still connected to the vehicle.

No diagnostic trouble codes (DTCs) are stored.
o Use C-III plus to perform Self Diagnosis for all systems.
o If there are any DTCs, other than B2724-23 and C1B56-04, diagnose, perform
repairs, and erase DTC before continuing.
1.
Connect the Vehicle Interface (VI) to the vehicle.
 Make sure to use the correct VI for the CONSULT.
Make sure the VI is securely connected. If the VI connection is loose during
reprogramming, the process will be interrupted and the control unit may be damaged.
2.
Connect the AC Adapter to the CONSULT PC.
Be sure to connect the AC Adapter. If the CONSULT PC battery voltage drops during
reprogramming, the process will be interrupted and the control unit may be damaged.
3.
Connect a battery maintainer or smart charger set to reflash mode or a similar setting.
To avoid damage to the control unit, ensure a battery maintainer or smart charger is
connected. The battery voltage must be between 12.0V and 15.5V during
reprogramming.
4.
Turn OFF all external Bluetooth® devices (e.g., cell phones, printers, etc.) within range
of the CONSULT PC and the VI.
Make sure to turn OFF all external Bluetooth® devices. If Bluetooth® signal waves are
within range of the CONSULT PC and the VI during reprogramming, reprogramming
may be interrupted and the control unit may be damaged.
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5.
Turn the ignition ON with the engine OFF.
To avoid damage to the control unit, the engine must not start or run during the
reprogramming procedure.
6.
Turn OFF all vehicle electrical loads such as exterior lights, interior lights, HVAC,
blower, rear defogger, audio, NAVI, seat heater, steering wheel heater, etc.
7.
Turn ON the hazard warning lamps.
8.
Turn ON the CONSULT PC.
9.
Start C-III plus.
10.
If prompted, select USA/CANADA Dealers from the drop down menu, and then
select OK.
11.
Login using your NNAnet credentials.
IMPORTANT: If not prompted to enter your username and password, the CONSULT
PC may not be connected to Wi-Fi. Close C-III plus, confirm the CONSULT PC is
connected to Wi-Fi, and then reopen C-III plus.
12.
Wait for the VI to be recognized.
 The serial number will display when the VI is recognized.
VI is
recognized
Figure 1
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13.
Select Diagnosis (One System).
Figure 2
14.
Select SONAR.
Figure 3
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15.
Select ECU Identification.
16.
Confirm the current SOFTWARE # (Figure 4). See Table A (below) for model specific
SOFTWARE #.

If the SOFTWARE # is in Table A, this bulletin does not apply. See the Electronic
Service Manual (ESM) for further diagnostic information.

If the SOFTWARE # is not in Table A, proceed to step 17.
28538XXXXX
XXXX
Bulletin does not apply if
this number is in Table A
Figure 4
Table A
MODEL
SOFTWARE #
Altima
L139
Murano
M016, M206, or M210
Rogue Sport
S140
Versa
D137
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17.
Select Home.
28538XXXXX
XXXX
Figure 5
18.
Select Re/programming, Configuration.
Figure 6
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19.
Use the arrows (if needed) to view and read all precautions.
20.
Check the box confirming the precautions have been read.
21.
Select Next.
Figure 7
22.
Select Automatic Selection(VIN).
Example
Figure 8
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23.
Confirm the VIN or Chassis # matches the vehicle’s VIN.
24.
Select Confirm.
XXXXXXXXXXXXXXXXX
XXXXXXXX
XXXXXXXX
Figure 9
25.
Select Confirm.
XXXXXXXXXXXXXXXXX
Figure 10
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26.
Select SONAR.
Figure 11
27.
Select Reprogramming.
Figure 12
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28.
When you get to the screen shown in Figure 13, confirm that a reprogram is available
as follows.
a. Find the Sonar Control Unit Part Number and write it on the repair order.
HINT: This is the current part number (P/N).
XXXXXXXXXXXXXX
Current Sonar
Control Unit P/N
28538XXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
Figure 13
b. Compare the part number you wrote down to the part numbers in Table B.
o If there is a match, continue with the reprogramming procedure.
o If there is not a match in Table B, this bulletin does not apply. See the ESM for
further diagnostic information.
Table B
MODEL
CURRENT SONAR CONTROL UNIT PART NUMBER: 28538-
Altima
6CA2A, 6CA3A
Murano
9UH1A, 9UF1B
Rogue Sport
6MM0B
Versa
5EA0A, 5EA1A
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29.
Follow the on-screen instructions to navigate CONSULT and reprogram the SONAR.
30.
Select Save.
XXXXXXXXXXXXXX
28538XXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
Figure 14
31.
Read the precautions on the CONSULT screen, check the box for Confirmed
Instructions, and then select Next. (Screens not shown.)
32.
Select Next.
28538-XXXXX
28538-XXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
Figure 15
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NTB22-038B
HINT: If you get the screen below and it is blank (no reprogramming listed), it means
there is no reprogramming available for this vehicle. Close CONSULT and refer back
to the ESM for further diagnosis.
SONAR
Figure 16
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33.
Make sure OK is highlighted green (battery voltage must be between 12.0 and 15.5
Volts).
To avoid damage to the control unit, ensure a battery maintainer or smart charger is
connected. The battery voltage must be between 12.0V and 15.5V during
reprogramming.
34.
Select Next.
Monitor battery
voltage here
Figure 17
35.
Confirm all Judgment items are “OK”, and then select Start.
Monitor battery
voltage here
Figure 18
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36.
Wait for both progress bars to complete.
Figure 19

When the screen in Figure 20 displays, the reprogramming is complete.

If the screen in Figure 20 does not display (indicating that reprogramming did not
complete), refer to Sonar Control Unit Recovery on the next page.
37.
Disconnect the battery maintainer or smart charger from the vehicle.
38.
Select Next.
Figure 20
HINT: Additional steps/operations are required before CONSULT will provide the final
reprogramming confirmation report. Continue with the reprogramming procedure on
page 16.
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Sonar Control Unit Recovery
Do not disconnect the VI or shut down CONSULT if reprogramming does not
complete.
If reprogramming does not complete and the “!?” icon displays, as shown in
Figure 21:

Check battery voltage
(12.0 - 15.5 V).

Ignition is ON, engine OFF.

External Bluetooth® devices are OFF.

All electrical loads are OFF.

Select retry and follow the on
screen instructions.

“Retry” may not go through on first
attempt and can be selected more
than once.
EXAMPLE
Figure 21
If reprogramming does not complete and the “X” icon displays, as shown in
Figure 22:

Check battery voltage
(12.0 - 15.5 V).

CONSULT A/C adapter is plugged in.

Ignition is ON, engine OFF.

Transmission is in Park.

All CONSULT VI cables are securely
connected.

All C-III plus updates are installed.

Select Home, and restart the
reprogram procedure from the
beginning.
EXAMPLE
Figure 22
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NTB22-038B
39.
Perform Erase All DTCs as follows:
a. Turn the ignition OFF.
b. Turn the ignition ON.
ON
Turn ignition OFF > ON
Figure 23
HINT: When the entire reprogramming process is complete, the screen in Figure 24 on
page 17 will display.
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40.
Verify the before and after part numbers are the same.
HINT: For this reprogram, the before and after reprogramming part numbers should
be the same. This is not an error.
41.
Print a copy of the screen below (Figure 24) and attach it to the repair order for
warranty documentation.
HINT: If you cannot print the screen:
a. Select Screen Capture.
b. Name the file.
c. Save the file in My Documents.
o A copy of the screen is now saved in the CONSULT PC. It can be retrieved
and printed at a later time.
42.
Select Confirm.
28538XXXXX
28538-XXXXX
These numbers
should be the
same
xxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxx
Figure 24
43.
Select Home (screen not shown).
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Sonar Control Unit Configuration
44.
Select Re/programming, Configuration.
Figure 25
HINT: CONSULT screens for steps 45-48 are not shown.
45.
Read the precautions on the CONSULT screen, check the box for Confirmed
Instructions, then select Next.
46.
Select Automatic Selection(VIN).
47.
Select Confirm.
48.
Select Confirm again.
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49.
Select SONAR.
Figure 26
50.
Select After ECU Replacement under VEHICLE CONFIGURATION.
Figure 27
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51.
Select Manual selection.
Figure 28
52.
Select the applicable Type ID.

53.
Refer to the EPC to determine the applicable Type ID.
Select Next.
28547 - XXXXX
28547 - XXXXX
28547 - XXXXX
28547 - XXXXX
28547 - XXXXX
Figure 29
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54.
Confirm that the correct Type ID is displayed, and then select OK.
28547 - XXXXX
Figure 30
55.
Select End.
28547 - XXXXX
Figure 31
56.
Select Home (screen not shown).
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57.
Select Diagnosis (One System).
Figure 32
58.
Select SONAR.
Figure 33
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59.
Select ERASE.
Figure 34
60.
Select ECU Identification.
61.
Confirm the SOFTWARE # (Figure 35).

If the SOFTWARE # is in Table A on page 5, proceed to step 62.

If the SOFTWARE # is not Table A on page 5, reprogramming did not
successfully complete. Go back to step 18 on page 6 and perform the procedure
again.
28538XXXXX
XXXX
Confirm that this number
is in Table A
Figure 35
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62.
Select Home.
28538XXXXX
XXXX
Figure 36
63.
Select Diagnosis (All Systems).
Figure 37
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HINT: CONSULT screens for steps 64-66 are not shown.
64.
Select Automatic Selection(VIN).
65.
Select Confirm.
66.
Select Confirm again.
67.
Turn the ignition OFF, and then turn the ignition ON.
68.
Confirm DTC C1B56-04 is displayed as PAST (not CRNT) (Figure 38).
69.
Select ERASE.
Figure 38
70.
Close CONSULT.
71.
Turn the ignition OFF.
72.
Disconnect the VI from the vehicle.
73.
Start the engine.
74.
Check that the RAB system setting can be enabled/disabled on the combination
meter.
75.
Test drive the vehicle and make sure it operates correctly and the MIL is OFF.

If the MIL comes ON, go back to the ESM for further diagnostic information.

Diagnosis and repairs beyond SONAR reprogramming are not covered by this
bulletin.
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CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
(1)
DESCRIPTION
PFP
OP CODE
SYM
DIA
FRT
Reprogram Sonar Software
(1)
RXA7AA
ZE
32
0.8
Reference the electronic parts catalog and use the Sonar Control Unit (28532-*****)
as the Primary Failed Part (PFP).
AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
DESCRIPTION
May 19, 2022
NTB22-038
Original bulletin published
January 24, 2023
NTB22-038A
Table A revised, and login information moved to
page 3
June 20, 2023
NTB22-038B
Pages 1-2 and Table A revised
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NTB22-038B