2019 4Runner, brand new G13 unit. Panasonic 86100-35364 OEM, no JBL sub. I have adjusted system, BT, and radio volume to 20. All sound sources (iPhone/carplay, radio) have very low volume, even with sound dial turned all the way up to 30. Please help.
@Bill Anderson
Hello.
Thanks for your message.
Please check the update tutorial below then give it a shot.
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Update File:
System Firmware-G13-20250421:
https://www.dropbox.com/scl/fi/lrj2dklb81rq0egrc4fu6/update.zip?rlkey=vtwke1qe2n4j15rbqge754w4q&e=1&dl=0
Tips:
1.
Download above update file via your computer/laptop.
2.
Format USB drive to FAT32 Format.
3.
Copy the file “update.zip”&“hmcu.img” to the root directory of USB drive.
4.
Insert USB drive into the unit via USB cable;
then it will pop up automatically a window of update.
Alternatively, please manually go "Settings > System > System updates/MCU updates" to start the update.
***NOTE:
Please make sure that you have ticked option "Wipe data and format flash!".
Reference Operation Video:
https://www.dropbox.com/scl/fi/7tgvc28sn77ux6g6fmosm/MCU.mp4?rlkey=7p5940e12kb88a42zue6qntft&e=1&dl=0
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@Bill Anderson
Hello.
About the hissing sound issue, please try to update the MCU.
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Update File:
MCU-4.16b:
https://www.dropbox.com/scl/fi/0ihjcsi6snloq2s1kmskv/hmcu.img?rlkey=gqylhwmievf23h5ksqa7xvtyy&e=1&dl=0
Tips:
1.
Download above update file via your computer/laptop.
2.
Format USB drive to FAT32 Format.
3.
Copy the file “hmcu.img” to the root directory of USB drive.
4.
Insert USB drive into the unit via USB cable;
Go "Settings > System > MCU updates" to start the update.
Reference Operation Video:
https://www.dropbox.com/scl/fi/3lc2147dbqhdzgb4hj7xg/MCU.mp4?rlkey=30eg901xpjok8uem4ei5o9492&e=1&dl=0
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Besides, please check if you have connected the RCA adapter cable(see pic).
If YES, please try to remove it to see if the volume can be improved.
