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Old 01-12-2021, 12:18 PM #1
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2021 model - stereo lost all audio sound

I'm the owner of a 2021 Venture model 4Runner, I have put 1K miles on it so far. First Toyota and first 4Runner. I was driving back from dropping my daughter off at school, and noticed nothing was playing on my stereo. I had my iphone 11 pro plugged in via USB, and Spotify was playing through Apple Carplay. I thought at first maybe I lost cell signal. I had full 5G service, and I could see the timer still counting on the display as if it were playing the song. I tried adjusting volume, volume on the phone etc. nothing. I then unplugged the iPhone, and selected Radio FM as the source. As I cycled through the settings I could hear the beeps in the system so the speakers seemed to be functional. Selected a local FM radio station, no audio. Went to AM, same thing, no audio. Volume up/ down, nothing. I hit the button to turn it off, and it displayed "Audio Off" so I know it was actually on to begin with. Finally, I pulled over, turned the truck off, turned it back on, and the radio was blaring! I plugged my iphone back in and viola! Spotify was playing and the audio was coming through just fine.....
I am not taking it to the Dealer with the problem not happening, as that is just an exercise in futility. Has anyone seen or heard of this issue? Am I going to be chasing some gremlin in this system?? This is really annoying and hopefully it was just a fluke, but would love to see if anyone else has had this.
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Old 01-12-2021, 12:39 PM #2
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Technology in general, not just the T4R, has "quirks" all the time.


I haven't seen or heard of many issues with the setup in 4runners, but that doesn't mean they don't exist. It could be anything. (iPhone, IOS or the cable, etc)

I don't have a carplay system in my T4R, but I have 2 other Toyotas with carplay and they have been solid.

If it's only happened once and it was solved by a "reboot" I wouldn't sweat it.

Remember the famous line from the IT department....... "Did you turn it off and back on again"
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Old 01-12-2021, 12:54 PM #3
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I've got about 10k miles on my 2020 with I believe the same head unit and haven't had anything like this happen that I can recall but I don't use CarPlay much. I usually just use Spotify via Bluetooth cause I can't be bothered to plug in my phone every time I drive lol.
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Old 01-12-2021, 01:44 PM #4
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You may want to look into updating the firmware.
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Old 01-12-2021, 05:48 PM #5
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Suggestion, if this happens again, you should video what its doing and/or not doing with your phone.
Video what it takes or doesn't take to get it back online.
With that video, and a visit to the dealership, any reputable dealership will fix it either by updating firmware (if needed) or replacing the HU.
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Old 01-12-2021, 07:49 PM #6
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When we first got our 2016 SR5 and not used to all the steering wheel controls, I accidently hit the "Mode/Hold" button on the steering wheel. The audio shut off and I didn't know what had happened, nor which button I had hit. I shut off the vehicle and after spending a lot of time reading the Nav/Multimedia manual I found what all the switches do and figured out what I had done by accident: I hit the MUTE button. Look up Mode/Hold switch function (page 114 in my 2016 manual) in your Nav/Multimedia Manual as I am sure the page numbers are different for your 2021

Not saying this is what you did, but your experience sounds like what happened to me. Just thought I would suggest this possibility. Hope this helps.
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Old 01-12-2021, 08:11 PM #7
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You're not alone... it happened in my 21 limited with less than 1000 miles. Bluetooth was connected, no audio. Restarted the truck and it was back to normal. Haven't happened since.
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Old 01-13-2021, 07:50 AM #8
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IMO its just a minor glitch in the MATRIX. Turn off, count to 10, turn on. Fixed. Thats how you repair cellphones, computers, and apparently trucks now. Things THEY don't want you to know!
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