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Pinpoint Test R : The DSP (Audio Digital Signal Processing Module) 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 - Sony with SYNC/Touchscreen Display for schematic and connector information.

Normal Operation and Fault Conditions 

The DSP 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 are translated through the GWM to the HS-CAN3.

Possible Sources 

Visual Inspection and Diagnostic Pre-checks 

Verify BCM fuse 28 (20A) is OK.

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