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NHTSA ID Number: 11034254

Manufacturer Communication Number: 15-336-25R

TSB/Document Date: 2026-07-02


Summary

This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 5 CP25 Audio and Navigation system utilized in the models listed. (This is an revised version of the original bulletin.)


SOA strongly discourages the printing and/or local storage of service information as previously
released information and electronic publications may be updated at any time.

Always check for any open recalls or campaigns anytime a vehicle is in for servicing.

Always refer to STIS for the latest service information before performing any repairs.

Continued...
Bulletin Number: 15-336-25R; Date: 06/22/26

Page 7 of 12

APPENDIX A
Links to Customer self-install instructions for FOTA Customer Instructions will be added to the
Subarunet Service Operations & Technical > Forms/Downloads page when they become available.
Once the links are available and to enhance customer satisfaction, consider providing customers
with a copy of the appropriate instructions for their specific system along with access to the retailer’s
secure customer Wi-Fi network. Doing so will enable customers to try performing the FOTA update
on their own while at the retailer.

REMINDER: Retailers performing these updates are to follow the Service Procedures outlined in
this bulletin ONLY. Always follow the applicable service procedures as outlined in this and other
Service Bulletins. The additional steps and requirements supplied in Service Bulletins support a
SubarueBay logo Technician’s proper diagnosis and repair of any customer concern.

Continued...
Bulletin Number: 15-336-25R; Date: 06/22/26

Page 8 of 12

APPENDIX B
How to set the correct time on the clock
Software Update availability notification only works, if the clock has been set accurately. Check if the
time is correct or not shown on the Home screen or shown on the status bar

If the time is not correct, set the clock using procedure below.

For more details, refer to the Owner`s Manual.

Continued...
Bulletin Number: 15-336-25R; Date: 06/22/26

Page 9 of 12

APPENDIX C
LIST OF IMPROVEMENTS
No

Category

Symptom
The CID display becomes unstable, and then the meter and CID restart.

1

Launch Navigation

After navigation startup, an “OS System Issue” pop-up appears.

2

Launch Navigation

3

Connected Service

SubarueBay logo Connected Services becomes unavailable.
Some regions are shown as blank, and navigation route guidance cannot be started

4

Navigation

When the source is switched from Android Auto Media to another media source using
voice recognition, the preset cannot be selected and Android Auto Media is played
instead.
5

SXM

6

Audio

Audio playback is interrupted intermittently when using Android Auto.

7

Audio

During a Bluetooth call, the other party hears noise.

8

OTA

The CCU fails to complete the FOTA installation. The installation failure occurs on every
attempt.

Continued...
Bulletin Number: 15-336-25R; Date: 06/22/26

Page 10 of 12

Appendix D
No.

Case Scenario

Causes

Check Points

Reference image

1. Troubleshooting for Step 1 (Check preconditions) in the Operation Guide.

1-1

“In order to use the software
update feature, a SubarueBay logo
Connected Services subscription is needed. Please
visit MySubaru online for
more information.”
appears during check for
update.

SubarueBay logo Connected
Service Subscription”
contract is not valid.

The type of subscription
contract may vary depending on your region. Please
contact your retailer for
details about the contract.

2. Troubleshooting for Step 2 (Download) in the Operation Guide.

2-1

2-2

2-3

“No response from server.
The system will automatically try to update again the
next time you start the car.”
popup appears during
download.

Shown when there is
no response from the
server and “Settings
> Software > SubarueBay logo
Connected Services System Update”
screen is selected.

“Connection failed.
Unable to check for updates
because no active internet connection has been
detected.”
popup appears during
download.

Shown when the LTE
connection is unstable and “Settings
> Software > SubarueBay logo
Connected Services System Update”
screen is selected.

“The software download
failed.”
popup appears during
download.

Shown when an
unexpected error
occurs and “Settings
> Software > SubarueBay logo
Connected Services System Update”
screen is selected.

There may be an issue on
the server providing the
service.
1. wait for a while
2. turn the engine/ignition
OFF and turn it ON
*If the symptom occurs
again, please contact your
retailer.
1. move to strong LTE signal
strength.
2. turn the engine/ignition
OFF and turn it ON
*If the symptom occurs
again, please contact your
retailer.
The download will automatically restart after 72 hours.
*If the symptom occurs
again, please contact your
retailer.

3. Troubleshooting for Step 3 (Installation) in the Operation Guide.
There may be an issue on
the server providing the
service.
1. wait for a while
2. turn the engine/ignition
OFF and turn it ON
*If the symptom occurs
again, please contact your
retailer.

3-1

“No response from server.
The system will automatically try to update again the
next time you start the car.”
popup appears during
installation.

Shown when there is
no response from the
server.

3-2

”Connection failed.
An error occurred during
installation.
Please try again.”
popup appears during
installation.

1. move to strong LTE signal
strength.
2. turn the engine/ignition
Shown when the LTE
OFF and turn it ON
connection is unstable.
*If the symptom occurs
again, please contact your
retailer.

Continued...
Bulletin Number: 15-336-25R; Date: 06/22/26

Page 11 of 12

No.

Case Scenario

3-3

“The software install failed.
Please try again.”
popup appears during
installation.

Causes

Check Points

Shown when an error
occurs during the
installation process.

The installation will automatically restart after 72
hours.
*If the symptom occurs
again, please contact your
retailer.

Reference image

Other

4-1

4-2

“Software update setup is
initializing...”
screen appears during all
updating process.

“Setup is initializing...”
screen appears during all
updating process.

This is not an error;
it is displayed only
during the 90-second
period after the engine
is turned on and
“Settings > Software
> SubarueBay logo Connected
Services System
Update” screen is
selected.
This is not an error;
it is displayed when
the internal process
has not been completed and “Settings
> Software > SubarueBay logo
Connected Services System Update”
screen is selected.

Bulletin Number: 15-336-25R; Date: 06/22/26

1. wait for 90 seconds.
2. continue following the
steps in the FOTA operation
guide.

Please retry after adhering
to the wait times specified
in troubleshooting guide or
and procedure of operation
guide.

Page 12 of 12

12

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TSB/Document ID: 15-336-25R

Replacement Service Bulletin Number:

MFR Communication Date: 2026-06-23

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ELECTRICAL SYSTEM

MFR Component System:

MFR Component Subsystem:


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