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IFCU/Skyline OS Support Resources
IFCU2025-01-31
SKYLINE
Table of Content
SOFTWARE
To download the latest software, see Infotainment Support Resources
NOTE
Refer to USB Drive Best Practices for drive format and size requirements.
Video 1. HOW-TO VERIFY THUMB DRIVE FORMAT
Video 2. IFCU 4125D Software Update
SKYLINE OS Update Preparation
NOTE
Click here to view supplemental installation instructions with enhanced graphics (English only).
Two separate USB-C thumb drives will be required. They will be referenced to as USB 1 and USB 2.
1. Required software files will need to be downloaded for the Skyline™ OS.
a. Software files may be found on: Service Information Portal (SIP).
b. Refer to:Infotainment Support Resources page.
2. Unzip the downloaded file titled: INSTANA_240003254D.
2.1. See Figure 2. Download file to thumb drive designated USB 1.
1USB-C Thumb drive 1
Figure 2. USB 1
2.2. See Figure 3. Make sure there is only one Folder on USB 1.
Figure 3. One File on USB 1
3. Unzip the downloaded file titled: INSTANA_240004125D. The unzipped folder should contain files: INSTANA_240004125D, CAL_NA_260404100D, QTL_NA_240603086D, VR_NA_240200060D, AMP_NA_235010504P.srec.
3.1. See Figure 4. Download files to thumb drive designated USB 2.
2USB-C Thumb drive 2
Figure 4. USB 2
3.2. See Figure 5. Make sure there are four Folders and one file on USB 2.
Figure 5. Four Folders and One File on USB 2
4. Prepare vehicle for software update:
b. Confirm the battery is at full charge prior to starting the update process.
4.1. See Figure 6. Connect vehicle to a battery tender and leave connected.
1Battery tender connectors
Figure 6. Connect Battery Tender
4.3. See Figure 7. Reserve 45 minutes for the complete update process without interruptions.
Figure 7. Process Timing
SKYLINE OS Update Procedure
1. Turn vehicle to ACCESSORY MODE.
a. See Figure 8. Press and hold Trip Switch for 3 seconds.
1Trip switch
Figure 8. Trip Switch
2. See Figure 9. Wait until the Infotainment Control Unit (IFCU) fully boots up and the Main Menu is visible.
Figure 9. Main Menu
3. Check software version:
a. Select: Settings (on IFCU)
b. Navigate: System > System Info > Product Information
c. If the version is 1467D, 2100D or 2111D, proceed to step 4.
d. If the version is 2237D or higher, skip to step 10.
1Product information
Figure 10. Product Information
4. See Figure 11. Insert Universal Serial Bus (USB) 1 into the vehicle's USB cable.
4.1. See vehicle's owner's manual for USB cable location.
1USB-C Thumb drive 1
Figure 11. USB 1
5. Wait for the system to recognize it. When prompted, select:
a. See Figure 12. UPDATE to proceed.
b. CANCEL to stop the process.
5.3. See Figure 13. An Error will show if the current IFCU software is 2237D or higher. Skip to step 10.
1Update
2Cancel
Figure 12. System Recognition
Figure 13. IFCU Software Error
6. See Figure 14. After update completes, USB1 will need to be removed before the IFCU will reboot.
Figure 14. Completed Software Update
7. Remove USB1. See Figure 15.
1USB-C Thumb drive 1
Figure 15. USB 1
8. See Figure 16. The IFCU will reboot automatically once USB 1 has been removed. DO NOT USE THE HAND CONTROLS TO TURN BIKE OFF OR ATTEMPT TO TURN ON.
Figure 16. DO NOT USE HAND CONTROLS
9. See Figure 17. Wait for the IFCU to fully boots up and the main menu is visible.
Figure 17. IFCU Main Menu Screen
10. See Figure 18. Insert USB 2 into the vehicle's USB cable.
NOTE
See Figure 19. DO NOT REMOVE USB2 AT ANY TIME DURING THE UPDATE PROCESS.
DO NOT USE THE HAND CONTROLS TO TURN THE BIKE OFF OR ATTEMPT TO TURN ON.
a. See vehicle's owner's manual for USB cable location.
2USB-C Thumb drive 2
Figure 18. USB 2
Figure 19. DO NOT USE THE HAND CONTROLS
11. See Figure 20. Wait for the system to recognize it. When prompted, select:
a. UPDATE to proceed.
b. CANCEL to stop the process.
c. The IFCU will perform five updates. Confirm each update to continue.
d. The IFCU will reboot after each update.
Figure 20. Perform Five Updates
12. See Figure 21. After the last update has been completed, a pop-up message will say: Updates Completed.
a. This message will only display for 10 seconds and then will self-clear.
Figure 21. Pop-Up Message
13. See Figure 22. Remove USB 2.
2USB-C Thumb drive 2
Figure 22. USB 2
COMPLETE
NOTE
Warning ICONS are expected and will clear upon restarting the bike.
1. See Figure 23. Turn the vehicle OFF manually.
a. To clear any warning ICONS. Leave the vehicle off for 60 seconds before turning ON again.
1Warning icons
Figure 23. Warning Icons Displayed
2. All software Updates have been completed. Verify through IFCU:
a. Skyline OS
b. Navigate: Settings > System > System info > Product information
c. Amplifier
d. Navigate: Settings > Sound > Speaker Setup > Device Status > Info
e. Verify audio is heard.
Release Notes
Update 4125D
Date: 2025-01-27
Fixes:
  • Software update process operation.
  • Battery drain potentially caused by IFCU response to customer interaction with the motorcycle when it should be in an off-power state
  • Subwoofer Gain adjustment functionality
  • Intermittent CarPlay connection and interaction
  • Intermittent mixed display High Contrast/Dark Mode
  • Intermittent access and display of main menu and widgets
  • Intermittent audio playback interruption after an announcement or prompt
  • Intermittent loss of audio due during a low battery voltage engine start
  • Navigation not enabling correctly after purchase of embedded navigation
  • Loss of audio or menu not loading after ignition cycle
  • Global Positioning System (GPS) location not updating after quick ignition cycle
Enhancements:Added Features:
Amplifier version 1.5.0.0 (Requires IFCU version 2237D prior to install)
Date: 2024-07-10
    New Features:
  • Support for P&A Subwoofer
Update 240002237D
Date: 2024-03-07
    New features for vehicles that originally had 240001467D software.
  • Speaker setup Menu. Allows speaker configuration changes to support P&A kit installs.
  • Help Menu
Fixes/Enhancements:
  • Audio: No audio/ loss of audio, Headset interaction-volume controls
  • Navigation: Location not updating, Online Services- enable Embedded Navigation
  • Navigation: Location not updating, Online Services- enable Embedded Navigation
  • Bluetooth: Connection robustness
  • CarPlay: Wired and Wireless connection robustness
  • Infotainment: Transport Mode screen, display improvements, Boot up improvements, HomeLink improvements.
  • Navigation: Lockup fixes, location not updating, Ride Planner improvements
  • Voice Recognition improvements
  • Various other bug fixes.
Skyline OS Update Troubleshooting Guide
Table 1. Troubleshooting Guide
CONCERN
CAUSE AND CORRECTION
When inserted BOTH USB1 (3254D) and USB2 (4125D) give Error message:
“Software version is incompatible. unknown”
  • The possible cause is from the previous IFCU update not being completed properly. Only USB1 (2213) was installed and then USB2 (2237D) was never attempted or completed.
  • USB2 (2237D) needs to be done, completing the previous update, before any further updates can be performed.
  • Confirm if "SoC Version" is listed as 240002213D: SETTINGS > SYSTEM>SYSTEM INFO > PRODUCT INFORMATION
  • If required, download and unzip USB2 INSTANA_240002237D to a dedicated USB drive with no other files or folders on it.
  • **USB2 (2237D) should ONLY be needed and used with IFCUs where the previous update was not completed correctly**
USB has been inserted but the IFCU never shows that it is connected.
USB needs to be inserted only AFTER the IFCU has fully booted up. Disconnect and reconnect USB.
For USB brand, size and formatting, see USB Drive Best Practices.
USB is recognized but the update never starts.
Folder loaded onto the USB is still Zipped preventing IFCU from reading it.
The folder name has accidentally been renamed. Folders need to keep their names as designed for the IFCU to identify them.
Update folders where never loaded onto the USB.
Update did not start or stopped with Battery Level Error message.
The IFCU check battery voltage before each update. If voltage is too HIGH or too LOW you will see this warning.  Battery voltage should be between 12.1-13.5 volt to continue.
If battery is fully charged, but the "Error!" message continues to display, disconnect the Engine Temperature Sensor. Then attempt the update again.
Receiving Error message about software being incompatible and update will not start.
You are attempting USB 2 updates before USB 1 updates. 2023 FLHXSE and FLTRXSE requires USB 1 update first.
The first sequence of update started and finished but now it will not automatically continue to the next one, like the instructions said.
You are attempting USB 2 updates without first doing USB 1 updates. On 2024 vehicles, if you do not perform USB 1 update first, the USB 2 update will require you to remove the USB after the 1st sequence and then reinstall it.
Receiving: Error! IFCU Update failed: Error XXXX
The USB has a file on it that is incomplete or corrupt. Delete everything from the USB. Redownload the update and try again.
Update stopped during the last sequence (amplifier update) and received this warning: Software Update Failed! Update has been cancelled.
The Amplifier update failed. To reset this connection follow the instructions on the screen.  Leave the USB inserted, turn the bike off for 90 second, turn the bike ON in Accessory.  Update should resume.
Update is taking too long or seems stuck.
The times listed for each sequence are for reference only.  The times may vary based on the quality and speed of your USB. Refer to USB Drive Best Practices.  .
Update has not progressed and is far past the estimated amount of time.
If the status bar has not moved for more than 30 minutes, leave the USB inserted, turn the bike OFF, allow to sit for 2 minutes, then turn back ON in Accessory.
If the status bar remains "stuck", leave the bike ON in Accessory, leave USB inserted, remove the main fuse. Allow to set for 2 minutes, then reinstall the main fuse and turn ON in Accessory.
Receiving error: Software Update Failed! USB Disconnected.
DO NOT REMOVE THE MAIN FUSE
With vehicle still in Accessory, disconnect USB thumb drive and then reconnect thumb drive.
If the update doesn't proceed, transfer the update files/folders to a new USB thumb drive and try again.
Receiving error: No valid software update is found.
Pull the Main Fuse
Redownload the IFCU update onto a new USB thumb drive
Insert the new USB into the the vehicle's USB‐C cable
Install Main Fuse
Turn vehicle ON in Accessory mode
Questions and Answers
  1. The audio is too quiet. Can I make it louder?
    1. To improve audio output it is recommended that the H-D Signature equalizer setting is used. See Figure 35.
    2. If playing audio through an I-Phone it is also suggested that in your Music settings, turn EQ off and disable Sound Check and Crossfade. See Figure 36.
      Figure 35. IFCU H-D Signature
      Figure 36. I-Phone Music Settings
  2. Can I route phone call audio from my headset to the bike's speakers?
    1. No. Phone call audio cannot be routed through the bike's speakers.
  3. Does Apple CarPlay require a headset to work?
    1. Yes. A headset must be paired to the bike for CarPlay to work.
How-to Videos
Audio
Video 3. Audio - Setting Fade
Video 4. Audio - Speaker Settings
Video 5. Audio - Tuner Settings
Video 6. Audio - Delete Favorite Tuner
Video 7. Audio - Headset Setting
Video 8. Audio - Set Favorite Tuner
Video 9. Audio - Setting Automatic Volume Control (AVC)
Video 10. Audio - Setting Equalizer (EQ)
Navigation
Video 11. Navigation - Adding Point Of Interest (POI) to Route
Video 12. Navigation - Audio Routing
Video 13. Navigation - Cancelling A Route
Video 14. Navigation - Importing From Ride Planner
Video 15. Navigation - Delete HOME
Video 16. Navigation - Display
Video 17. Navigation - Prompt Muting
Video 18. Navigation - Ride Record
Video 19. Navigation - Set a Route
Video 20. Navigation - Set HOME
Video 21. Navigation - Weather
Phone
Video 22. Phone - Playing Music Through Paired Phone
A headset must be paired with vehicle for this feature to work.
Video 23. Phone - Carplay Enable
Video 24. Phone - Menu Options
Video 25. Phone - Pairing
Setup
Video 26. Setup - Custom Ride Mode Settings
Video 27. Setup - Display Layout
Video 28. Setup - Units Change
Video 29. Setup - VOX Sensitivity
Video 30. Setup - Widgets Displayed Using Trip
Video 31. Setup - Connecting WiFi Iphone (5Ghz only)
Video 32. Setup - Connecting WiFi Android (5Ghz only)
Wireless Connectivity/Headset
Video 33. Wireless Connectivity - Pairing a Headset
Video 34. Wireless Connectivity - Passenger Headset Audio Settings
Video 35. Wireless Connectivity - Rider Headset Audio Settings
USB Drive Best Practices
    To optimize software updates and minimize potential issues, follow these best practices regarding your USB device.
  • Use a reputable brand of USB flash drive (e.g., SanDisk, Kingston, Samsung, PNY)
  • Use a dual USB-A/USB-C drive (no adapters)
  • Choose a drive with at least 100 MB/s read/write speed, typically specified on the packaging (e.g. "Speed up to 200MB/s").
  • Ensure the drive is formatted properly for your device:
    1. IFCU/Skyline OS, Amplifier: exFAT
    2. Pan America/Sportster S/Nightster S TFT Gauge, GT/GTS Radio: FAT32
  • Only have one update file on the drive at a time. Review specific installation instructions to verify the correct file or folder is copied to your USB.
  • Drive size should be 32GB. Drives larger than 32GB can't be formatted to FAT32 and will not work for updates requiring that format.