Pinpoint Test L : The Audio Front Control Module (ACM) Does Not Respond To The Diagnostic Scan Tool: Notes
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Module Communications Network for schematic and connector information.
Refer to Audio System/Navigation - Without SYNC for schematic and connector information.
Normal Operation and Fault Conditions
The ACM communicates with the diagnostic scan tool through the HS-CAN3. Diagnostic messages are sent/received between the DLC and the diagnostic scan tool through the HS-CAN2 circuits at the DLC, and translated through the GWM to the HS-CAN3.
Possible Sources
- Fuse
- Wiring, terminals and connector
- ACM
Visual Inspection and Diagnostic Pre-checks
Verify BCM fuse 33 (20A) is OK.