NHTSA ID Number: 11027996
Manufacturer Communication Number: 15-305-22R
TSB/Document Date: 2026-02-02
Summary
The following information announces reprogramming file availability and provides a software update installation procedure to optimize the new Gen 4.5 Denso CP1.5 Audio and Navigation head units utilized in the models listed.
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TSB/Document ID: 15-305-22R
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-20
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
F71WMM073-670 (MID FOTA software)
F91WMM073-770 (MID FOTA software)
F91WMM073-870 (MID FOTA software)
F71WHM073-670 (HIGH FOTA software)
F91WHM073-770 (HIGH FOTA software)
F91WHM073-870 (HIGH FOTA software)
- See TSB 15-311-23 Appendix C
2023-2025
RC6
3/24/2025
FM1WHM174-880 (High model software)
FM1WMM174-880 (Mid model software)
FM1WBM174-880 (Base model software)
- See "Conditions Addressed by Update #5" as
outlined in Appendix 9 below
2025
Forester
2025 WRX
RC6
(FOTA Software Version)
6/12/2025
FN1WWM144-470 (HIGH FOTA software)
- See TSB 15-326-25 Appendix C
2023-2026
RC7
9/10/2025
3
4
5
6
2023-2024
2023-2025
NEW Version ID #:
'XXXXXX185-180
Conditions Addressed:
- See "Conditions Addressed by Update #6" as
outlined in "Appendix 9" below
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 36 of 80
APPENDIX 9
Symptoms Addressed By Update #6:
Number
1
2
3
Category
Symptoms to be Improved:
While using Wireless CarPlay or Android Auto, the Wi-Fi connection
between the vehicle and the smartphone may be temporarily interrupted
due to signal issues.
In some cases, the system fails to reconnect automatically, leaving CarAndroidAuto
Play/Android Auto disconnected. Attempts to reconnect manually also
and CarPlay
fail.
During use of Wireless CarPlay or Android Auto, the Wi-Fi connection
between the vehicle and the smartphone is lost.
After turning the ignition OFF and ON, it takes approximately 10–15
seconds for the screen to respond after touching the CID.
Display Lag
As a result, the screen may appear frozen.
Note: This issue is limited to vehicles equipped with a fully digital instrument cluster.
In rare cases turning ignition off and on during FOTA update corrupts
the updated software resulting in the CCU to fail to boot. As a result, the
Reprogramming
CID screen does not start.
Security for update have been strengthened.
Symptoms Addressed By Update #5:
Number
Category
1
Telematics
2
Reset
Symptoms to be Improved:
WRC-24 Service Program, if applicable
Due to a communication failure between the CCU and the telematics Data
Communications Module (DCM), telematics services such as the MySubaru
in-vehicle app may not be functioning.
If SXM was playing at the time of ignition-off, CID screen reboot occurs approximately 3 minutes after the ignition is turned on the next time.
The system cannot recover when an error occurs during the Wi-Fi function
startup process causing CID screen to turn black and freeze.
Processing slows down and CP1 resets and restarts when following steps are
performed: while listening SXM, go to Categories >Talk tab > Entertainment
> On Demand list, press “Back” and repeat the list quickly and repeatedly.
After the "Loading""icon appears on the CID screen, the CCU restarts, and
the "Loading" icon continues to appear repeatedly.
The CID screen resets within three minutes after turning the ignition on.
After turning the ignition on, switching to the navigation (MAP) screen
causes the navigation app to restart. This issue occurs when the destination
suggestion feature is enabled.
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 37 of 80
Number
3
Category
AndroidAuto
and
CarPlay
4
CarPlay
5
Wi-Fi
6
Bluetooth
7
Media USB
8
Audio
Output
9
Symptoms to be Improved:
Following the steps below results in all smartphone connectivity features,
including Android Auto and CarPlay, becoming unavailable:
1. While using Android Auto via USB, shut down Android Auto while keeping the USB connection intact.
2. After step 1, launch Wireless Android Auto while still connected via USB.
CarPlay fails to reconnect automatically when turning the ignition off while
CarPlay is active or turning the ignition on when "See You" is displayed on
the CID screen.
The screen does not return to the CarPlay display and instead shows the CCU
main screen (HOME screen).
CarPlay cannot be launched. (Other functions, such as Android Auto, are
available)
When the maximum of seven smartphones are already registered, an additional smartphone is registered. On the newly added smartphone, call operations
for CarPlay,such as answering, holding, and ending calls using the steering
wheel switch, cannot be performed.
After starting the CCU, functions that use Wi-Fi connection with a smartphone, such as CarPlay and AndroidAuto, are not activated.
When the WALKMAN NW-A100 series is connected via Bluetooth, the
message ""Use Connected device to control playback"" is displayed on the
CID's Bluetooth audio screen and playback controls from the CID are
disabled while the audio can be heard without problem.
Modify the system to allow playback controls from the CID as well.
When an Android smartphone is connected via USB and Android Auto is
launched, all Bluetooth-related functions become unavailable. This includes
connecting, disconnecting, and deleting pairings.
The data on the USB drive fails to play, when a USB drive contains only
video files (without any audio files).
When USB drive Audio is selected, "Loading Device..." continues to be
displayed, and the loading process does not complete.
No sound from the speakers, after turning the ignition off while the driver’s
door is open then turning the ignition on again within approximately 5
seconds.
The SXM channels changes before and after turning the ignition off/on.
SXM
The word “Loading” is not displayed during the loading of the SXM screen
and the field remains blank. The selected stations are displayed as usual only
after the loading is completed. It occurs when you turn the ignition off with
SXM (IP channel) playing and then turn the ignition on again.
While playing the SXM Radio OnDemand channel, switching to another
audio source such as radio or telephone, then switching back to SXM would
cause playback to start from the beginning of the next episode.
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 38 of 80
Number
Category
9
Symptoms to be Improved:
When the language used is switched according to the driver profile, SXM's
Setting information is not switched, and registration/deletion of Notification,
Favorite, and History information is not possible.
In the above situation, if “College Football” is selected from the add screen
of the TeamNotification screen, the SXM application restarts and playback of
channel 1 will begin approximately 90 seconds later.
SXM
The SXM function becomes unresponsive, and the SXM app restarts. This
condiction occurs, if quickly switching back and forth between an SXM SAT
channel that is not registered in the preset and an IP channel.
No audio output, when switch the driver profile and then immediately changing the audio source while playing SXM.
While playing SXM, pressing and holding the channel logo to add the channel to Favorites. Immediately after, switching the audio source to FM would
cause audio output interruption.
10
Radio
11
When bookmarking a song during HD Radio Replay playback, the song
information registered is not from the Replay playback but from the current
Live playback.
When searching for a destination in the navigation system, the address in the
list only displays up to the postal code, state, and city, but the town name is
not shown.
The popup for switching connection to DCM which should only appear when
starting a Map OTA update is incorrectly displayed when transitioning to the
navigation screen.
Navigation
When registering a home address using the address search function, the
retrieved address is displayed on the screen. However, if the user presses
"Set""on the home registration screen, the system recalculates the address
based on the latitude and longitude of the displayed location.
(Example) If the user searches for ""7130 Orchard Rd"" and registers it
as their home address, it is recorded as ""7134 Orchard Rd"" instead. This
results in a discrepancy between the searched address and the registered
home address.
When launching the MAP application, only the CID screen background is
displayed, and the MAP application does not appear. The system then returns
to the HOME screen.
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 39 of 80
Number
Category
12
When transitioning to the maintenance screen, the following two issues occur
depending on the previous startup's maintenance settings:
Car Info
Display
13
14
15
16
17
Symptoms to be Improved:
1. When maintenance was set to Auto in the previous startup: A subscription
prompt popup appears despite an active subscription, and the setting switches
to Manual.
2. When maintenance was set to Manual in the previous startup: Pressing the
Auto button triggers a subscription prompt popup, preventing the switch to
Auto.
The clock shows incorrect time shifting by the same offset as the UTC
difference. For example, if set to UTC+3, the time advances by 3 hours.
Clock
Linked to a DCM malfunction preventing time information to be supplied
to CCU the clock setting is switched from AUTO to MANUAL and back to
AUTO in a vehicle not equipped with NAVI option.
Upon recovery from the EyeSight HALT error, the lane blinking display on
Meter
the meter display flickers (the lane guide line sappear momentarily and then
Display
disappear).
Turn by Turn (TBT) isplay on the meter screen does not appear and remains
Meter
blank. However, this issue only affects the always-on TBT display, while the
Display
interrupt TBT during navigation guidance is displayed correctly on the meter.
When users wanted to delete data logs (CCU internal operation logs), it was
not possible to remove them through user operations. Deletion required perLog
forming the operation in Dealership Mode.
Modify the specifications to enable DLT logs to be deleted through the
Factory Data Reset operation.
SWID verification fails at the start of reprogramming with SSM5, preventing
the reprogramming process from starting.
Note:The following issue also occurs due to a poor connection, failure, or
Reprogramming
data corruption of the USB memory used for reprogramming. In such cases,
reinserting, replacing the USB memory, or re-downloading the data may
resolve the issue.
Symptoms Addressed By Update #4:
Number
1
Category
Reset
2
CarPlay
Symptoms to be Improved:
CID screen (CCU) repeatedly resets every 3 minutes.
Wireless conenction drops while using wireless CarPlay due to external signal interference from surrounding facilities etc.
(only applicable to HIGH and MID trim)
During CarPlay handsfree call receiving party is not able to hear the caller as
the microphone data is muted
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 40 of 80
Number
3
Category
Symptoms to be Improved:
When wireless AndroidAuto connection failed, the same connection failure
error was displayed in all cases. Since it was difficult to understand how to
deal with the problem, the connection failure error was divided into several
phases.
1st step: Bluetooth connection phase
2nd step: Confirmation phase of Wi-Fi connection information
3rd step: Wi-Fi connection and Android Auto connection phase
AndroidAuto
Failure in the 1st step: Various error messages are displayed to try the user to
redo the connection procedure.
Failure in the 2nd step: When an error occurs, an automatic retry is performed
by internal processing, and the screen indicates that a retry is in progress.
Failure in the 3rd step: The timer for determining failure is too long, so it is
changed from 130 seconds to 45 seconds to shorten the time until the error
message is displayed.
(only applicable to HIGH and MID trim)
When the USB cable is disconnected while using Android Auto with wired
connection (USB connection), automatic switching connection to wireless
Android Auto connection may fail.
(only applicable to HIGH and MID trim)
Wireless Android Auto connection fails.
(only applicable to HIGH and MID trim)
The Android Auto icon does not appear on the Home screen; pressing the
Android Auto icon from the Apps screen does not activate wireless Android
Auto.
(only applicable to HIGH and MID trim)
AndroidAuto connection via USB connection sometimes fails.
(Caused by the USB connection mode connecting the Android device to the
on-board device not switching in the expected order)
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 41 of 80
Number
4
Category
Symptoms to be Improved:
1. Toggling the CarPlay ON/OFF switch multiple times on the Manage Devices screen while the iPhone is connected via USB, may result in a ""Bluetooth connection unavailable"" state. It is the same as a ""CarPlay connection
unavailable"" state. Bluetooth icon in the top right corner of the CID screen
may still indicate a connected state.
2. When multiple Android Devices attempt to connect during ignition on, it
may result in a "Bluetooth connection unavailable" state. It is the same as a
"wireless Android Auto connection unavailable" state. Bluetooth icon in the
top right corner of the CID screen may still indicate a connected state.
Bluetooth
5
Audio
Bluetooth connection may not be available and the pairing Delete may not
work.
(only applicable to HIGH and MID trim)
(1) After ignition on, the audio may not return to the audio that was playing at
the previously played audio.
(2) Audio sound may not sound immediately after ignition on.
On iPhone audio with iOS 16.4 or later the song list disappears when a song
in the playing playlist is selected.
(only applicable to HIGH and MID trim)
After ignition on it may take approximately 16 seconds for iPod audio audio
to play.
(only applicable to HIGH and MID trim)
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 42 of 80
Number
6
Category
Display
Symptoms to be Improved:
The registered mobile device information is not displayed on the Manage
Devices screen.
(This occurs when the name or device ID of a mobile device contains a character code that cannot be displayed.)
(only applicable to HIGH and MID trim)
The order of 1.First Name and 2.Family Name in the phone book is set to
1.→2. even if the order is set to 2.→1.
The message function may become unavailable following repeated page
scrolling up and down of the list on the phone's message list screen.
(only applicable to HIGH and MID trim)
When transitioning to the maintenance screen and the setting value is set to
AUTO, a popup prompting the user to sign a MySubaru contract is displayed
and the setting is switched to Manual.
(only applicable to HIGH and MID trim)
When turning off and on while two or more shortcuts of DMS/SRH/SRVD
icons are set on the Home screen, the order of icons changes from DMS to
SRVD, SRH, VDC, AVH, and ISS.
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 43 of 80
Number
6
Category
Display
Symptoms to be Improved:
The AVH icons on the HOME screen are initially lined up next to the ValetMode icon. However, in some cases they are placed at the top (upper left
corner of the first page) or next to the MAP icon.
(only applicable to HIGH and MID trim)
After switching the clock function to AUTO, the CID screen display may
become distorted.
(only applicable to HIGH and MID trim)
It may take accessive time to start the CID screen after ignition on.
7
SXM
The first time ignition on after the CCU software update added the SXM360
functionality, the SXM playback screen may remain at “Loading...” after the
CCU software update.
Continued...
Bulletin Number: 15-305-22R; Revised: 01/20/26
Page 44 of 80
Number
7
Category
SXM
Symptoms to be Improved:
The SXM function will not accept any further operations during playback of
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