Pinpoint Test J : The Audio Control Module (ACM) Does Not Respond To The Diagnostic Scan Tool: Notes

WARNING: This page is about a different car, the 2016 Lincoln MKX. 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 - AM/FM/CD/SYNC/Touchscreen Display for schematic and connector information.

Refer to Audio System/Navigation - Harman Revel Audio System for schematic and connector information.

Refer to Audio System/Navigation - Harman Revel Ultima Audio System for schematic and connector information.

Normal Operation and Fault Conditions

The ACM communicates on the HS-CAN3, and communicates with the diagnostic scan tool through the HS-CAN2. Diagnostic messages are sent/received 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.