There is a known issue where the sub woofer makes a pop or thump when you get near the car with the fob/during wake-up event. Here is what I found-
2017 MKC – Without THX Audio Systems – Subwoofer Double Pop Noise During Wakeup Event And/Or Speaker Fade Setting Returns To Default After Key Cycle
Some 2017 MKC vehicles without THX audio systems may exhibit a subwoofer double pop noise during a wakeup event and/or the speaker fade setting returns to default after a key cycle.
A wakeup event may include any of the following actions: door open, key fob used, tailgate activated, etc.
The noise could also be described as a low tone bump sound, as if someone lightly tapped on the most rearward side window.
Reprogram the audio control module (ACM) to the latest calibration using the Integrated Diagnostic System (IDS) release 102.04 or higher.
Make sure you are connected to the internet when entering module programming to obtain the latest updates.
Calibration files may also be obtained at www.motorcraftservice.com.
2017 MKC – Without THX Audio Systems – Subwoofer Double Pop Noise During Wakeup Event And/Or Speaker Fade Setting Returns To Default After Key Cycle
Some 2017 MKC vehicles without THX audio systems may exhibit a subwoofer double pop noise during a wakeup event and/or the speaker fade setting returns to default after a key cycle.
A wakeup event may include any of the following actions: door open, key fob used, tailgate activated, etc.
The noise could also be described as a low tone bump sound, as if someone lightly tapped on the most rearward side window.
Reprogram the audio control module (ACM) to the latest calibration using the Integrated Diagnostic System (IDS) release 102.04 or higher.
Make sure you are connected to the internet when entering module programming to obtain the latest updates.
Calibration files may also be obtained at www.motorcraftservice.com.
