NHTSA ID Number: 10238458
Manufacturer Communication Number: 15-311-23
TSB/Document Date: 2023-07-03
Summary
This bulletin provides instruction for use of a new reprogramming procedure to optimize the Denso Gen 4.5 Audio and Navigation system utilized in the models listed.
Page 10 of 19
Appendix C
The currently available FOTA software version is not the same version available to Retailers for
USB updating use. However, the system which has been updated via the FOTA can be further
updated using USB update. To clarify the differences, both the USB contents and FOTA contents are
described together in the list below. USB update is including all items and those items included only
in the USB (but not in the FOTA) updates are described as “USB ONLY.
List of Conditions, Symptoms and improvements Addressed By this update
USB ONLY update method:
Please note any symptoms listed below would require USB update due to the limitations of FOTA
update process.
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
Update Method
1
CID goes black and does not accept any control.
USB ONLY
USB or FOTA update method:
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
1
CID reboots.
2
“Manage Devices” is grayed out and cannot establish Bluetooth connection.
3
When the Bluetooth connection is cancelled manually on the mobile phone
side during hands-free calling, the Bluetooth connection is disabled for
that particular mobile phone. Even when it occurs, the connection can be
reestablished by deleting the device in “Manage Devices” and register the
device again by adding operation.
4
Bluetooth connection fails against the device that was pared before and
“Manage Devices” is grayed out.
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 11 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
Bluetooth connection is disabled with a discrepancy in the display of status
bar (showing Bluetooth devices being connected) and the “Manage Devices”
screen (showing no Bluetooth devices being connected.)
5
6
7
8
9
Android Auto Wireless (AAW) cannot be connected.
Android Auto Wireless (AAW) cannot be started from “Manage Devices”
Screen.
Sound volume control does not work while using Android Auto. It is caused
by data communication error between Android device and CCU.
Cyclic short noise like a drilling or vibration is heard from speakers.
Sound is lost when changed to Subchannel 2 right after a preset HD radio
channel has been selected.
10
11
12
After the destination is set on Navi screen, voice recognition command of
“Find along route” is made, search results are not given in
order of distance.
When “Call” button is pressed in “Confirm Destination” screen of Navigation
system (to call the destination site,) the call can be made but the screen does
not transit to phone call screen.
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 12 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
Popup of “The update was successfully installed” is not displayed after
reboot (IG-OFF and ON) operation of FOTA (Firmware Over The Air) update.
13
14
When tapping preset “Team Channel” on SMX, a popup of different game is
displayed.
A wrong search location is used on TravelLink function.
Example of the symptom.
15
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 13 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
16
Music cannot be played sequentially when they are stored in different folders
in a USB memory. The specifications are improved to enable music in
different folders to be played sequentially.
“Repeat All” is added as one of the play modes.
17
18
“Track-up/down” can be used across folders in “Repeat All” mode.
iPod/iPhone tab in Media screen cannot be selected, when connected by
USB.
The symptom occurs when the iPhone is connected to CP1.5 via Bluetooth in
parallel to USB connection by error. (It is supposed to be connected either via
Bluetooth or by USB.)
19
On the “Manage Devices” screen Bluetooth cannot be selected as connection
preference.
20
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 14 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
Status of Bluetooth on Manage Device screen is displayed as disconnect
even though the Bluetooth Icon on top right of the screen is showing active.
21
22
Cannot pair new Bluetooth device or cannot connect paired Bluetooth device.
This symptom possibly occurs after repeating IG OFF/ON operation while still
pairing operation.
23
Cannot pair Bluetooth device, when Bluetooth device has long name
including symbols.
SXM station shortcut created by the customer does not work when the SXM
has not been used as audio source after the Ignition Switch was turned on in
the ignition cycle.
24
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 15 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
Manage Device Screen becomes dark and inoperative when Ignition Switch is
turned Off and On while starting CarPlay by CID operation.
25
26
Cannot connect to CarPlay via wireless connection. This symptom possibly
occurs after the Ignition Switch was turned Off and On abruptly.
POI Search Result shows only city names and distances (without unit) when
voice recognition POI search with Category name like “Find toll gate” is used.
27
28
Navigation restarts itself, when the letters are rushly inputed or deleted using
keyboard function to search destination.
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 16 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
“Manage Route” button is not displayed when touching the route line on
Navigation system, when the route search criteria got changed in the Route
Preference Screen after a route had been searched.
29
“Manage Route” button is not displayed and buttons on the Current Route
Screen become unselectable (turns to grayish fill) when the Navigation
system is operated in the sequence of “Manage Route” > “Avoid Blocked
Road” (in the Current Route Screen) > “Back.”
30
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 17 of 19
Symptoms Addressed By Update
No
Conditions/Symptoms to be improved
31
After the FOTA is completed, the CCM does not send the confirmation data
to the server even though it displays pop-up message of completion. The
status is updated when the FOTA operation is made next time.
32
A pop-up message of “Connection Error” is displayed when the pop-up
message of Service Appointment Scheduler Popup is displayed after the
engine was turned on and the “Read Now” button is pressed immediately
after that.
Continued...
Bulletin Number: 15-311-23; Date: 06/23/23
Page 18 of 19
Appendix D
TROUBLESHOOTING:
No.
Applicability
2-1
Case Scenario (Trouble)
Causes
Check Points
"In order to use the software update feature,
a SUBARU
STARLINK subscription is needed.
Please visit MySubaru online for more
information." is shown.
SUBARU
STARLINK
subscription is not
confirmed
Please verify SUBARU![]()
STARLINK subscription
status
Step 2
(Downloading)
"The software download failed." popup is
shown while downloading.
2-2
"The software installation failed. An error
occurred during installation. Please contact
your retailer." popup is shown while
installing.
3-1
"The software installation failed. An error
occurred during installation. Please contact
your retailer." popup is shown while
installing.
3-2
Step 3
(Installation)
Downloading will resume
automatically 24hours
later. If same error
An exception error due
message again, please
to hardware malfunction
perform diagnostic of
CCU or update CCU
software via USB.
An exception error due
to hardware malfunction
Installation will resume
automatically 24hours
later. If same error
message again, please
perform diagnostic of
CCU or update CCU
software via USB.
An exception error due
to hardware malfunction
Installation will resume
automatically 24hours
later. If same error
message again, please
perform diagnostic of
CCU or update CCU
software via USB.
Selected , but next time
IG ON 3.a.i screen is not displayed.
3-3
Bulletin Number: 15-311-23; Date: 06/23/23
DCM has lost connection Assure DCM has strong
to SUBARU
server.
reception and reliable
After downloading was
connection with the
completed, DCM needs server, then turn ignition
to connect with SUBARU
OFF and ON to repeat the
server, before installing
test.
Page 19 of 19
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TSB/Document ID: 15-311-23
Replacement Service Bulletin Number:
MFR Communication Date: 2023-06-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:ELECTRICAL:INFOTAINMENT:SOFTWARE
MFR Component System:
MFR Component Subsystem:
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