After downgrade back to Sync 3.3, Navigation forgets route & favorites whenever engine shut off

The current problem: When the engine is shut off during a trip (even just 5 minutes), the navigation system forgets that it had an active route AND it forgets where “Home” is and all other Navigation favorites disappear too. Weirdly, it still remembers “Recent destinations” though!

Troubleshooting: I have already used the Interrogator and verified rwdata is not full – It has over 800M free. As far as I’ve noticed so far, all other Sync features are behaving properly.

History: On my 2018 F-150, I have used CyanLabs Syn3Updater successfully several times over recent years. I’ve used several versions of 3.4 for years, but finally got so sick of the glitchy stuttering playback of many songs from USB flash drive that I reverted to the only 3.3 version I could find in Syn3Updater. Also, a few months ago we started having problem with the nav system forgetting its route and the media system forgetting things constantly (while on 3.4.23088) and it WAS caused by the rwdata partition being full. Clearing it fixed those issues then. The current problem I’m reporting is more limited and started just after reverting to 3.3.


SYNC Region: NA

Navigation Variant: Nav

Manufacturer Year: Pre MY20

Install Type: OEM

Old SYNC Version: 3.4.23188

New SYNC Version: 3.3.19052

Do you have a error message, if so what is it?
No errors.

Update Method: CyanLabs Syn3 Updater

Syn3 Updater Version: 2.13.1.0

Syn3 Updater Documentation Read: yes

Syn3 Updater Log File

<?xml version="1.0" encoding="UTF-8"?>
<p:OTAModuleSnapShot xmlns:d2p1="urn:ford/Vehicle/Module/Information/v3.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="urn:ford/com/productdesign/ipp/ModuleSnapshot/v2.0" version="2025-03-20" xsi:schemaLocation="urn:ford/Vehicle/Module/Information/v3.0 ModuleSnapshot.xsd">
<p:VIN>***********</p:VIN>
<p:ModuleName>ECU</p:ModuleName>
<p:RequestRole>
  <d2p1:Role>CONSUMER</d2p1:Role>
  <d2p1:RoleSource>OTA</d2p1:RoleSource>
  <d2p1:RoleDesc>SYNC</d2p1:RoleDesc>
  <d2p1:RoleID>OTA</d2p1:RoleID>
</p:RequestRole>
<p:BroadcastDTCType/>
<p:Node isFlashed="false" specificationCategory="GGDS">
  <d2p1:Address>7D0</d2p1:Address>
  <d2p1:ECUAcronym name="APIM">
    <d2p1:State>
      <d2p1:Gateway gatewayType="NONE">
        <d2p1:DID didFormat="ASCII" didType="Embedded Consumer Operating System Part Number" didValue="8033" responseLength="24">
          <d2p1:Response>4U5T-14G381-AN</d2p1:Response>
          <d2p1:IsConfig>false</d2p1:IsConfig>
        </d2p1:DID>
        <d2p1:DID didFormat="Packeted" didType="Embedded Consumer Applications Part Numbers 1" didValue="8060" responseLength="384">
          ...
      </d2p1:Gateway>
    </d2p1:State>
  </d2p1:ECUAcronym>
  <d2p1:ODLNetwork d2p1:NetworkDataRate="500" d2p1:NetworkName="HS-CAN" d2p1:NetworkProtocol="CAN" d2p1:DLCName="SAE J1962" d2p1:Pins="6,14"/>
  <d2p1:AdditionalAttributes logGeneratedDateTime="2025-03-20T12:41:22+00:00" RAM="1035767808" vmcuVersion="Vector_VMCU_02.02.20">
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.6G" available="12M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.5G" available="12M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.5G" available="12M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.5G" available="10M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1003M" available="3.1M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.3G" available="8.3M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.8G" available="14M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.7G" available="17M"/>
    <d2p1:PartitionHealth type="/fs/sd/MAP/" total="1.3G" available="6.4M"/>
    <d2p1:PartitionHealth type="/fs/Nuance/" total="1.7G" available="16M"/>
    <d2p1:PartitionHealth type="/fs/Nuance/" total="1.1G" available="10M"/>
    <d2p1:PartitionHealth type="/fs/Nuance/" total="2.5G" available="23M"/>
    <d2p1:PartitionHealth type="/fs/Nuance/" total="480M" available="23M"/>
    <d2p1:PartitionHealth type="/fs/Nuance/grace" total="1.0G" available="57M"/>
    <d2p1:PartitionHealth type="/fs/rwdata/" total="1.2G" available="806M"/>
    <d2p1:PartitionHealth type="/fs/mp/" total="1.4G" available="505M"/>
    <d2p1:PartitionHealth type="/fs/images/" total="25G" available="3.4G"/>
    <d2p1:InstallationLog/>

Did you reformat back to Sync 3.3 or just downgrade? It would be best to reformat to completely wipe the system and start fresh as there could still be leftover temp data that is corrupted. Also, make sure that you include the appropriate Sync 3.3 files for system voice, Gracenote’s, etc. Do not use the Sync 3.4 files, there are inconsistent results and incompatibilities. You left this out of the log file.

F150Chief, thanks for the quick response! The log file in my question post was from the Interrogator. The log you may have expected is here below. I had just used the most automatic settings but to save time I chose “Use existing maps”. That I believe caused it to switch to just “autoinstall” mode.

I can re-try this later, with re-applying the latest maps, which changes to “Reformat” mode you are recommending.

CYANLABS - SYN3 UPDATER - V2.13.1.0
Branch: Stable
Operating System: Microsoft Windows 10 Pro Education N (2009)

PREVIOUS CONFIGURATION
Version: 3.4.23188
Region: NA
Navigation: True
Install Mode: Auto-Detect (autoinstall)
Install Mode Overridden: False
My20 Protection Enabled: Disabled / Not MY20

DESTINATION DETAILS
Mode: Drive
Model: SanDisk Ultra USB Device
Size: 231.9GB
FileSystem: exFAT
Partition Type: MBR

REFORMAT.LST
VOICE=5U5T-14G391-CS_1660783942000.TAR.GZ
GRACENOTES=4U5T-14G423-CC_1615429225000.TAR.GZ
APPS=NU5T-14G381-AD_1689364279000.TAR.GZ
VOICE_NAV=4U5T-14G422-CCN_1709611788000.TAR.GZ
VOICE_NAV=4U5T-14G422-CBN_1709611416000.TAR.GZ
VOICE_NAV=4U5T-14G422-CAN_1709610798000.TAR.GZ
MAP=4U5T-14G421-CJG_1709610049000.TAR.GZ
MAP=4U5T-14G421-CHG_1709609492000.TAR.GZ
MAP=4U5T-14G421-CGG_1709608813000.TAR.GZ
MAP=4U5T-14G421-CFG_1709608559000.TAR.GZ
MAP=4U5T-14G421-CEG_1709607297000.TAR.GZ
MAP=4U5T-14G421-CDG_1709589204000.TAR.GZ
MAP=4U5T-14G421-CCG_1709587982000.TAR.GZ
MAP=4U5T-14G421-CBG_1709587496000.TAR.GZ
MAP=4U5T-14G421-CAG_1708029977000.TAR.GZ

AUTOINSTALL.LST
; CyanLabs Syn3Updater 2.13.1.0 Stable - Autoinstall Mode - Sync 3.3.19052 NA

[SYNCGen3.0_ALL_PRODUCT]
Item1 = RWDataCleaner TOOL - PU5T-14G386-BB_1690840002000.TAR.GZ
Open1= SyncMyRide\PU5T-14G386-BB_1690840002000.TAR.GZ
Item2 = APPS - 4U5T-14G381-AN_1552583626000.TAR.GZ
Open2 = SyncMyRide\4U5T-14G381-AN_1552583626000.TAR.GZ
Item3 = VOICE - 4U5T-14G391-CJ_1552513842000.TAR.GZ
Open3 = SyncMyRide\4U5T-14G391-CJ_1552513842000.TAR.GZ
Item4 = GRACENOTES - 4U5T-14G423-CA_123766.tar.gz
Open4 = SyncMyRide\4U5T-14G423-CA_123766.tar.gz
Options = AutoInstall

FILES (21)
4U5T-14G381-AN_1552583626000.TAR.GZ (479.7MB)
GB5T-14G386-SC_85041.tar.gz (1.8KB)
1u5t-14g386-cb.tar.gz (8.5MB)
PU5T-14G386-BB_1690840002000.TAR.GZ (3.2KB)
5U5T-14G391-CS_1660783942000.TAR.GZ (385.5MB)
4U5T-14G423-CC_1615429225000.TAR.GZ (564.2MB)
NU5T-14G381-AD_1689364279000.TAR.GZ (869.8MB)
4U5T-14G422-CCN_1709611788000.TAR.GZ (540.7MB)
4U5T-14G422-CBN_1709611416000.TAR.GZ (793MB)
4U5T-14G422-CAN_1709610798000.TAR.GZ (1.2GB)
4U5T-14G421-CJG_1709610049000.TAR.GZ (707.8MB)
4U5T-14G421-CHG_1709609492000.TAR.GZ (1023.3MB)
4U5T-14G421-CGG_1709608813000.TAR.GZ (1.2GB)
4U5T-14G421-CFG_1709608559000.TAR.GZ (1.1GB)
4U5T-14G421-CEG_1709607297000.TAR.GZ (1.1GB)
4U5T-14G421-CDG_1709589204000.TAR.GZ (1.3GB)
4U5T-14G421-CCG_1709587982000.TAR.GZ (1.1GB)
4U5T-14G421-CBG_1709587496000.TAR.GZ (1.1GB)
4U5T-14G421-CAG_1708029977000.TAR.GZ (1014.9MB)
4U5T-14G391-CJ_1552513842000.TAR.GZ (381.5MB)
4U5T-14G423-CA_123766.tar.gz (724.2MB)

Is this a 4" to 8" upgrade?

No, all hardware is original. Only software changes.

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