DAB (and sometimes USB/AndroidAuto) defaults back to FM instantly

Everything started in October 2022, when I installed the official Ford Sync update to version 3.4.22200. After that, DAB could no longer be used. Selecting DAB would immediately switch back to FM. Occasionally, this also happened with USB or Android Auto as the source. FM stations had poor reception, and in some cases, searching was not possible at all.
At the time, I was unable to confirm the update on the Ford website, so I contacted their customer service. They manually confirmed the update and additionally sent me the F11 map update via email. The installation worked, but confirming it via the log file was still not possible.
I then left the issue unresolved until 2025. Since then, I first tried updating to 3.4.23188 via CyanLabs, but the problem persisted.
After that, I performed a “clean” downgrade to 3.3.19052, followed by another update to 3.4.23188. The issue still remained.
I have already searched through the forum and tried several things, for example changing the “FM/AM Antenna Config” from “Incorrect Value or not configured” to all possible settings, without success.


SYNC Region: EU

Navigation Variant: Nav

Manufacturer Year: MY20

Install Type: OEM

Old SYNC Version: 3.4.22200

New SYNC Version: 3.4.23188

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

Update Method: CyanLabs Syn3 Updater

Syn3 Updater Version: 2.14.2.0

Syn3 Updater Documentation Read: yes

Syn3 Updater Log File

https://cyanlabs.net/fhub/sync3/syn3-updater-log/?uuid=1f166753-a49a-6ff8-8017-0242ac130005

Try doing a downgrade to 3.4.21265 followed by a master reset.

Will try, thanks. Why exactly this particular version?

3.4.21265 was the last clean build before the RWData bug was introduced.

The bug was fixed in 3.4.23188, but I’ve had APIMs where the partition didn’t clear even going to .23188.

They cleared when dropping to 3.4.21265 and after that 3.4.23188 was reinstalled without any problem.

Sadly nothing changed. I was able to do the full installation but the issue remains: Radio is “stuck” to FM. If I hit “DAB” as Source it just defaults back to FM immediately.

Please post your current AB settings on the modules for both the APIM and ACM.

Please be aware that Ive been testing here and there to try and fix the issue. Issue started before I ever opened AsBuilt and even with the storage/backed up settings the issue remained.

Thanks in advance!

ACM

;Block 1
727G1G1043304FC1077
727G1G2010105110049
727G1G3000000000032
727G1G40033
;Block 2
727G2G10637
;Block 3
727G3G12355
;Block 4
727G4G103000100477E
727G4G24D0001000385
727G4G3030000000038
727G4G4000000000036
727G4G5020000000039
727G4G6000000000038
727G4G7000000000039
727G4G80000003A
;Block 5
727G5G10012006C00B2
727G5G2C60120017A97
727G5G301D401D401E1
727G5G4D401D401D4B5
727G5G5039603F004C8
727G5G64A0012006C01
727G5G700C600C600C6
727G5G8C600C600C68D
727G5G9028802E203AD
727G5GA3C039603F00B
727G5GB044A044A04E4
727G5GC4A044A044A2B
;Block 6
727G6G10250000250D9
727G6G2000250000189
727G6G3C200025E0059
727G6G4027E00027E38
727G6G500027E0002BB
727G6G67E00027E0038
727G6G700F200012E5C
727G6G80001BE0001FC
727G6G9C60002620067
727G6GA027A00027A3C
727G6GB00027A0002C3
727G6GC7A00027A003C
727G6GD00F600013270
727G6GE0001C200010C
727G6GFCA000266007B
727G6H002760002763A
727G6H10002760002C5
727G6H276000276003A
;Block 7
727G7G101640182011F
727G7G2820182012360
727G7G300A400A1017E
727G7G42301230123A4
727G7G500A100A1007C
727G7G6A100A100A11E
727G7G700A100A1007E
727G7G8A100A100A120
727G7G900A100A10080
727G7GAA100A100A128
727G7GB00A100A10088
727G7GCA100A100A12A
;Block 8
727G8G1804182838481
727G8G28586878889DB
727G8G34A8B4C4D8E35
727G8G44F509152530F
727G8G5945556975869
727G8G6599A5B5C9D83

APIM

;Block 1
7D0G1G18A6A019A50B8
7D0G1G2025C04428200
;Block 2
7D0G2G1474D0B04C23F
7D0G2G28B1C90ACBC7A
7D0G2G3AE048E
;Block 3
7D0G3G10000010000DC
;Block 4
7D0G4G100001D8239B4
7D0G4G2010AE8
;Block 5
7D0G5G1190819082645
7D0G5G25331
;Block 6
7D0G6G1805E
;Block 7
7D0G7G10B0533000022
7D0G7G200006428006C
7D0G7G30056566600F3
7D0G7G46143
;Block 8
7D0G8G148050040006D
7D0G8G28100335010F5
;Block 9
7D0G9G14B032C8303E1
7D0G9G22044401015AB
7D0G9G3004400000027
7D0G9G4000000004F33

Disable SDARS and HD Radio in the ACM. Set the APIM to Gen2.

Thanks for your reply.
Did set it like that. Nothing changed.

;Block 1
727G1G18C3304FC10FF
727G1G2010105110049
727G1G3000000000032
727G1G40033
;Block 2
727G2G10637
;Block 3
727G3G12355
;Block 4
727G4G103000100477E
727G4G24D0001000385
727G4G3030000000038
727G4G4000000000036
727G4G5020000000039
727G4G6000000000038
727G4G7000000000039
727G4G80000003A
;Block 5
727G5G10012006C00B2
727G5G2C60120017A97
727G5G301D401D401E1
727G5G4D401D401D4B5
727G5G5039603F004C8
727G5G64A0012006C01
727G5G700C600C600C6
727G5G8C600C600C68D
727G5G9028802E203AD
727G5GA3C039603F00B
727G5GB044A044A04E4
727G5GC4A044A044A2B
;Block 6
727G6G102500001CA52
727G6G2000250000189
727G6G3C200025E0059
727G6G4027E00027E38
727G6G500027E0002BB
727G6G67E00027E0038
727G6G700F200012E5C
727G6G80001BE0001FC
727G6G9C60002620067
727G6GA027A00027A3C
727G6GB00027A0002C3
727G6GC7A00027A003C
727G6GD00F600013270
727G6GE0001C200010C
727G6GFCA000266007B
727G6H002760002763A
727G6H10002760002C5
727G6H276000276003A
;Block 7
727G7G101640182011F
727G7G2820182012360
727G7G300A400A1017E
727G7G42301230123A4
727G7G500A100A1007C
727G7G6A100A100A11E
727G7G700A100A1007E
727G7G8A100A100A120
727G7G900A100A10080
727G7GAA100A100A128
727G7GB00A100A10088
727G7GCA100A100A12A
;Block 8
727G8G1804182838481
727G8G28586878889DB
727G8G34A8B4C4D8E35
727G8G44F509152530F
727G8G5945556975869
727G8G6599A5B5C9D83