Thanks for all the extra info and AsBuilt configs!
Yeah, I was definitely under the assumption that the G series APIMs, especially without the MY18.5+ firmware, wouldn’t be compatible. I already had an H model on the way before purchasing the ACM and plan to update it to the newer firmware first thing. That was already on the agenda for modding purposes. I’ll see how it fares with everything else in line before I go looking for a K model and will report back.
The VMEF7/8 lines I’ve checked and similar to what you noted over on the 2020 APIM/ACM compatibility thread, it looks like they’re already connected based purely on wiring diagrams. The VMEG1/2 lines are the only other concern but shouldn’t be too difficult to sort out.
Regarding the Sony stuff: Mine is equipped with the Sony ‘DSP’ in that it does have external amplification separate from the ACM. It’s all done within the DACMC module alongside the current factory ANC functionality. There’s no actual ‘DSP’ module listed anywhere. Small, inconsequential correction: This is a 9 speaker system, not 10. 4 main speakers, 4 tweeters, and the center channel. No subwoofer.
One gotcha with the info you noted is that the current 2013 ACM w/the Sony system is configured from the factory as External Variable both front and rear hence why I put that into the new AsBuilt. So far that AsBuilt is 100% factory (for the original Sync 2/MFT system) with no changes from me. I can definitely try both options when I get the ACM and start messing about with things and see what works.
I’ll also see how well the ANC options fare. I’d prefer to keep it active if possible unless something really breaks with the new hardware. The ANC operates a little differently on the C-Max in that it only operates while the ICE is operating and seems to focus more on just canceling engine noise vs ambient noise and the engine does tend to be a bit annoyingly buzzy under some conditions with it disabled. Under EV operation (including in Hybrid/EV Later mode when the engine isn’t running) the ANC is completely inactive. Here’s the snippet from the workshop manual on its operation:
The DACMC is a digital signal processor that consists of an internal analog/digital converter, amplifier, and tone generator.
The DACMC operates with the ignition in RUN, ACC, or OFF. Active noise control functions only operate with the ignition in RUN.
The ACM outputs voltage through the enable circuit to enable the DACMC amplifier. The ACM also uses this circuit to detect an amplifier overload condition. In the event of an amplifier overload, the DACMC 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 DACMC to prevent clipping and speaker damage.
The DACMC receives engine rotation speed data and active noise control microphone input signals and calculates the targeted frequency needed to cancel engine noise within the passenger compartment. The DACMC outputs the engine noise cancellation frequency to all audio system speakers, except the instrument panel center speaker (if equipped), as fluctuating AC voltage.
The DACMC receives audio signals from the ACM when audio is being played. The DACMC amplifies these signals and sends them to all of the audio system speakers, except the instrument panel center speaker (if equipped), as fluctuating AC voltage. If the engine is running and the audio system is in use, the DACMC mixes the engine noise cancellation frequency signal with the audio signals from the ACM . The mixed audio signals are then sent to all of the speakers, except the instrument panel center speaker (if equipped), as fluctuating AC voltage.
The DACMC requires Programmable Module Installation (PMI) when it is replaced.
Beyond all that, it’s just waiting for it to arrive and I can start messing with it.