2D Sound on Startup

[TaxmanHog]

Never owned a diesel truck but I never realized they were paralleled to just crank the truck I always assumed it was to warm the glow plugs and to have reserve for accessories and the like.
I don't know what battery types everyone uses but AFAIK most battery testers are only designed to test lead acid and AGM, likely leading to the false positives. Lithium and sodium ions are trixy.

That as well, the glow cycle was very brief on my truck even in the coldest of winters.

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[Ford Motor Company]

I believe this is a Ford "quirk." I've had it happen to me in several Ford vehicles dating back to my 2015 Mustang, several Raptors, my wife's past Explorer, her present Bronco Sport and for sure I've had it many times in my 2025 Lightning. It's happened to me mostly when I turn off the vehicle, exit and return in a short time frame (like less than 10 minutes). Like when we're in northern Michigan, jump out to grab an ice cream and get back in and there it is, just in time for our long ride south. It isn't just the ding-ding of the seat belt chime. It's every chime including instrument panel dings, BlueCruise dings, collision warning dings... they're all that "tinny" cheap sound that come from an instrument panel speaker instead of the interior speakers.

For years, I heard my battery was low potentially. That didn't pan out on any of my vehicles. And yes, I've checked the batteries on all of my vehicles over the years. It's not the batteries.

I've scoured the internet looking for a reason why and a couple of posts seemed to have the most reasonable answer. One said the Accessory Protocol Interface Module (APIM) didn't boot up on time. Someone else said the Battery Management System (BMS) needs to be reset and goes on to explain how to do it (key on, flash the high beams, etc.). Neither give me the satisfaction of knowing why and more notable, why it can't be remedied in the last 10 years.

I really love all my Ford products, past and present. This is just an annoyance that has outlived its time.

Anyone from Ford care to respond to this - would be much appreciated.

@Ford Motor Company

I'll see what I can track down.

 

[irunalot]

I'll see what I can track down.

Thanks Brian. Pretty sure it has to do with the bootup sequence of the AIPM and other modules. The tinny speaker in the IP is likely an FMVSS requirement as a backup in case the premium sound fails. We really appreciate your (Ford's) involvement in this forum.

 

[Ford Motor Company]

Thanks Brian. Pretty sure it has to do with the bootup sequence of the AIPM and other modules. The tinny speaker in the IP is likely an FMVSS requirement as a backup in case the premium sound fails. We really appreciate your (Ford's) involvement in this forum.

Okay, what I heard back is "generally low battery but they are right it could be a module not booting in time - but those are going to be different odd sounds".

As for a fix (if not the 12V battery) let me see if there's something I can find to share.

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