Battery in engine compartment, disconnecting and reconnecting: Notes
Should service procedures in this information specify disconnecting and reconnecting the battery, please heed the following CAUTIONS!:
CAUTION:
Before beginning repairs on the electrical system:
- Where applicable, obtain anti-theft radio security code.
- Switch off all electrical consumers.
- Switch the ignition off and remove ignition key.
- Disconnect negative ( - ) battery terminal.
- On vehicles equipped with Audi Telematics by OnStar (R) , switch-off the emergency (back-up) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery → 91 - COMMUNICATION
- After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Information and/or Owners Manual.
- After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar (R) , switch-on the emergency (back-up) battery for the Telematic/Telephone Control Module → 91 - COMMUNICATION