If you are having issues where the APIM doesn’t turn off after the car ignition is off and door opened.
In ForScan set the APIM As-Built 7D0-06-01: x1xx-xx
In UCDS set the APIM DEO5 > “illumination Gateway” to C1MCA
Using the Utility Tab of Syn3 Updater create and run a Gracenotes Removal USB. Once done, install your desired update unselecting Gracenotes, once installed do the same thing but unselect everything except Gracenotes.
This error may be generated by a condition where data cannot be processed or saved on the system due to inadequate free storage/memory. This lack of sufficient storage space affects the ability of the APIM to process tasks, save settings, etc.
Before trying anything else make sure to Master Reset from Settings > General > Master Reset. Once done give it some time (with the car on over a day or so) and if the issue is still there let us know in the comments.
This is thought to be a hardware failure in the APIM. Try performing a master reset and reinsert the USB stick. If the error persists, the APIM (Sync3) hardware module may need to be replaced in your vehicle.
You can only have 10 items in the autoinstall.lst, remove extras.
Usually this occurs when you are trying to install maps on a non-navigation APIM.
Recreate the USB without maps.
Change NAV type in AsBuilt from Telenav to NNG
If you currently have a 2 set it to 4
if you currently have a 3 set it to 5
Due to restricted filesystem space you may not be able to upgrade to a newer version of Sync3.
See the tutorial by F150Chief: Tutorial: Sync 3.4 NON-NAV APIM: Failure to Update to Newer Version Sync 3.4 - Ford / Guides - CyanLabs Official Community