and/or Owner's Manual.
After reconnecting vehicle battery on
vehicles equipped with Audi Telematics by
OnStar , switch-on the emergency (back-
up) battery for the Telematic/Telephone
Control Module. Use VAS 5051 Vehicle
Diagnostic, Testing and Information System
in mode "Guided Fault Finding" Page 91-
119 .
Note:
Further measures after reconnecting the voltage
supply:
Repair Manual, Fuel Injection & Ignition,
Repair Group 24
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication