Ram Trucks 2015 ProMaster Commercial - Owner Manual - Manual (Page 165)

In USB mode, the radio plays MP3, WMA and AAC files
stored on the device connected to the USB port that is
located on the lower right side of the steering wheel on
the instrument panel.
To enter USB mode, you must push the SRC button.
When you enter USB mode, the display shows ЉLOAD-
INGЉ while the radio checks whether the connected
device is valid.
If there is no USB device, an invalid USB device, or a
valid device that is defective, the display will show ЉERR
USBЉ for two seconds and the radio remains in TUNER
mode. If a valid device does not contain any playable
files (i.e. MP3, WMA or AAC), the display will show ЉNO
MUSICЉ for two seconds and the radio remains in
TUNER mode.
If playable files are found, the radio will also check that
the connected device is the same as the one used imme-
diately before the USB function. If this is the case, music
playback will start from the point where it was inter-
rupted (file and music runtime). If not, the file played
will be the first valid file, in the sequence shown in the
following example:
4
UNDERSTANDING YOUR INSTRUMENT PANEL 163