JVC KW-M450BT Instruction Manual page 50

Troubleshooting Troubleshooting
"Parking Off" appears.
 No playback picture is shown when the parking 
brake is not engaged.
"Could not learn the steering remote control key."
appears.
 Your steering remote controller is not compatible, 
learning may not be completed. Consult your car
audio dealer for details.
"Learning Process Failed." appears.
 Your steering remote controller is not compatible, 
learning may not be completed. Consult your car
audio dealer for details.
* For KW-M450BT Australia and New Zealand models: Separately
purchase optional remote controller, RM-RK258.
USB
"Reading" does not disappear from the screen.
 Turn the power off and on again. 
While playing a track, sound is sometimes
interrupted.
 The tracks are not properly copied into the USB 
device. Copy the tracks again, and try again.
Tracks are not played back as you have intended
them to play.
 Playback order may differ from the one played back 
using other players.
"USB device over current status detected." appears
when you connect a USB device.
 The USB port is drawing more power than the 
design limit.
48 ENGLISH
 Turn the power off and unplug the USB device. 
Then, turn on the power and reattach the USB
device.
 If the above does not solve the problem, turn the 
power off and on before replacing with another
USB device.
iPod/iPhone
No sound comes out of the speakers.
 Disconnect the iPod/iPhone, then connect it again. 
 Select another source, then reselect "iPod". 
 If you use "Mirroring" source before, verify that the 
iPhone's screen recording function is stopped.
The iPod/iPhone does not turn on or does not
work.
 Check the connection. 
 Update the firmware version. 
 Charge the battery. 
 Reset the iPod/iPhone. 
Sound is distorted.
 Deactivate the equalizer either on this unit or the 
iPod/iPhone.
A lot of noise is generated.
 Turn off (uncheck) "VoiceOver" on the iPod/iPhone. 
For details, visit <http://www.apple.com>.
No operations are available when playing back a
track containing artwork.
 Operate the unit after the artwork has loaded. 
"Authorisation Error"/"Unsupported Device"
appears.
 Check whether the connected iPod/iPhone is 
compatible with this unit. (Page 47)
Mirroring
No sound while using Mirroring for JVC
application.
 Make sure the smartphone and this unit is 
connected via Bluetooth.
 Raise the volume on your smartphone. 
 Try another music application. Some application 
does not support Mirroring for JVC application
playback. (Apple Music App does not support
playback using Mirroring for JVC application.)
No sound while using "iPod" source or "BT Audio"
source.
 Make sure you stop broadcast on iPhone's screen 
recording function after you disconnect from
mirroring operations.
Cannot operate Mirroring for JVC application with
touch panel operation.
 Available functions may differ from the ones 
operated on the smartphone.
 Depending on the connected smartphone, some 
functions do not work on this unit.
 Depending on the operating system (OS) of the 
connected smartphone, some functions do not
work on this unit.
The unit does not respond when you try to
perform an operation.
 Unplug the smartphone from the USB input 
terminal, then reattach the smartphone again.