Audio Front Control Module (ACM)
WARNING: This page is about a different car, the 2012 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
The Audio Front Control Module (ACM) can be operated with the key in RUN or ACC. The accessory delay feature allows the audio system to be operated for a preset period of time after the key is turned off and a door has not been opened. The ACM sends AC voltage audio signals to the speakers or to the amplifiers, depending on vehicle configuration. The ACM can produce its own DTCs, which can be communicated to the scan tool through the Medium Speed Controller Area Network (MS-CAN).