English
42
Troubleshooting
Before going through the checklist please make all the con-
nections first. If you still have questions after going through
the checklist, please consult your local customer service
representative.
Fault Symptoms Cause
Solution
No function.
The ignition is
switched off.
Turn the ignition
key to “ON” or
“ACC”.
One or more fuses
have blown.
Replace the fuse
by another 5 A /1 A
fuse.
Device cannot be
switched on or off
via the ignition.
Incorrect con-
nection (each car
manufacturer wires
the ISO connection
in the vehicle differ-
ently).
Please contact your
car workshop or
a vehicle special-
ist for connection
adapters may
specifically for your
model.
The device does
not work correctly.
The microcom-
puter has been
interfered with by
electromagnetic
fields.
Switch the device
off and on again.
No radio recep
-
tion.
The antenna cable
is not connected.
Insert the antenna
cable firmly into
the antenna socket
of the device.
Poor radio recep-
tion.
It is possible that
your vehicle has
a special antenna
(phantom-pow-
ered antenna.)
Please contact your
car workshop or a
vehicle specialist.
(For other manu-
facturers there are
specific phantom
power supply
adapters and
voltage adapters
available.)
Summary of Contents for AR 4027 USB/CR
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