Audio DSP Module

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

The audio DSP module can be operated with the ignition in RUN, ACC, or OFF.

The audio DSP module enhances the input audio signal sound quality from the ACM.

The ACM outputs voltage through the enable circuit to enable the audio DSP module amplifier. The ACM also uses this circuit to detect an amplifier overload condition. In the event of an amplifier overload, the audio DSP module modifies the voltage signal from the ACM to increase the voltage on the enable circuit to a higher level than provided by the ACM. This higher voltage level causes the ACM to momentarily reduce the audio levels on the left and right audio output channels to the audio DSP module to prevent clipping and speaker damage.

The audio DSP module receives stereo audio signals from the ACM in the form of fluctuating AC voltage. The audio DSP module processes and amplifies these inputs and sends left and right analog audio signals to the speakers as fluctuating AC voltage.

The audio DSP module receives mono audio signals from the APIM in the form of fluctuating AC voltage. The audio DSP module processes the audio signals and sends them to the speakers as fluctuating AC voltage.

The audio DSP module requires PMI when it is replaced.