In rare cases, your unit may not function the way you expect it to. Before calling the
service department, please read the operating instructions thoroughly and go through
the following check list; it may be possible to quickly remedy an apparent malfunction.
Symptoms Possible cause / remedy
General
Unit does not function. No display. • Check the fuse (unit and vehicle) and the connections (see installation
instructions).
Audio or MP3 CD rejected by the unit. The CD may be dirty.
• Clean the CD with a special CD cleaning fluid.
Incorrect CD format (for instance: Mac format, wrong extension for MP3 file
name).
The telephone is not being detected even
though it has been connected to the radio.
Incorrectly configured muting signal (for instance, in the case of a Nokia
hands-free system).
• Open the PHONE LEVEL setup menu and select HIGH.
Unit not functioning properly / at all on some
VW / Audi vehicles.
Some VW and Audi vehicles have different power supply connector pin
assignments (ISO chamber A).
• Interchange cables A4 and A7 at the fuses of the ISO-A extension cable.
No video signal in the case of DVD / AUX. Hand brake not applied.
• Apply the hand brake.
No video signal despite applied hand brake:
Hand brake signal disconnected or incorrectly connected.
• Check the connections (refer to the installation instructions).
Radio
Poor radio reception. • Check if the antenna is completely extended and correctly connected.
• Check whether the supply voltage’s negative pole (brown cable) is correctly
connected to earth (vehicle chassis).
If the unit is being installed in VW and Audi vehicles, you will need a feed
multicoupler for the antenna.
• Use a suitable adapter (e.g. Votex).
The frequency instead of the station name is
displayed.
The unit is tuned to a station that does not transmit RDS signals or the
transmitter is too weak.
The required station cannot be tuned to using
automatic search.
The desired station is too weak.
• Set the desired station manually (TUNER menu -> MANUAL).
• Check whether the antenna is completely extended and correctly connected.
No traffic announcements are switched through
(during CD / MP3 playback).
• Activate the TA function in the main menu.
MP3 / CD / DVD changer:
Distorted sound / skips during disc playback /
no playback possible.
Changer cannot read disc due to damage or soiling.
Disc is not compatible with CD changer standards.
• Refer to the operating manual of the MP3 / CD / DVD changer for supported
formats.
MP3 / CD / DVD changer does not function. In cold weather conditions, condensation may occur on the laser.
• Wait for 5 minutes until the condensation evaporates.
No sound during CD playback. Some CDs contain multimedia data which are not recognised by the changer.
• Advance the tracks until music is heard.
Problems with new copy-protected audio CDs. Some copy protection procedures are incompatible with accepted standards for
audio CDs. This is not a fault on the unit.
For more information, please contact the service department or your dealer.
Subject to technical modifications and errors.
Troubleshooting
18