Audi A4 Sedan 2004 Communications Manual

Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication
Radio system
General information
CAUTION!
Before beginning repairs on the electrical
system:
Obtain anti-theft radio security code if
necessary.
Switch the ignition off.
Disconnect battery Ground (GND) strap.
On vehicles equipped with Audi Telematics
by OnStar , switch-off the emergency (back-
up) battery for the Telematic/Telephone
Control Module prior to disconnecting
vehicle battery. Use VAS 5051 Vehicle
Diagnostic, Testing and Information System
in mode "Guided Fault Finding"
119 .
After reconnecting vehicle battery, re-code
anti-theft radio if necessary and check
operation. Also check operation of clock and
power windows according to Repair Manual
91-1
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