Telematics

General Information

CAUTION:
Before beginning repairs on the electrical system:
- Switch off all electrical components.
- Switch the ignition off and remove ignition key.
- Disconnect negative ( - ) battery terminal.
- Prior to disconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar, switch-off the emergency (back-up) battery for Telephone/Telematics Control Module J526.
- After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar, switch-on the emergency (back-up) battery for Telephone/Telematics Control Module J526
- When disconnecting and reconnecting battery terminals, observe all applicable Notes and torque specifications, as well as instructions on performing OBD program and electrical system function checks as specified

CAUTION:
- OnStar will cease telematics service/support of the Audi telematics system on December 31, 2007 (information at time of publication). Audi telematics systems will not function from this time on.
- Under no circumstances should any telematics system diagnosis or repairs be carried out after December 31, 2007.

The telematics system installed as optional equipment from model year 2002 through 10.04 production.

Telematics is an in-vehicle communication system that uses cellular, internet and Global

Positioning System (GPS) technologies to provide the customer with safety, security and convenience services.

GPS is a "constellation" of 24 satellites that orbit the earth and constantly broadcast radio signals. The Telematics/Telephone Control Module receives GPS data, decodes it, and transmits the vehicles location to the service providers call center via the national cellular network.

Telematics services for Audi customers are provided by OnStar via a dedicated call center. Service plans may provide route directions and concierge services as well as emergency or vehicle repair services. For details Audi Telematics by OnStar Owners Manual.

During events where the Airbag Control Module processes a crash signal, the vehicle emergency flashers are activated and the doors are unlocked via the respective door control modules. In addition, the telematics system automatically places an emergency call to the OnStar call center.

Telematics hardware includes the driver operated telematics control head (which contains the OnStar control buttons and system status light), microphone, backup loudspeaker, roof-mounted GPS/Cellular antenna, Telematics/Telephone Control Module (with supporting software) and related wiring.

An emergency (back-up) battery for the telematics control module is also used in case the vehicle battery goes dead or becomes disconnected due to accident, impact etc..

All telematics components are factory installed/integrated into the vehicle electrical system.

An optional cellular telephone is integrated with the telematics system. Telephone antenna type, quantity and location varies by model.

Telematics System, layout:
- Sedan
- Avant

Telematics System, component overview:
- Sedan
- Avant

Before troubleshooting or servicing, technicians must be familiar with the functions and operation specifics of the telematics system. Always read the Audi Telematics by OnStar owners manual and review all telematics functions.

NOTE:
Additional information:
- Audi Telematics by OnStar Owners Manual
- Wiring Diagrams Component Locations
- Antenna cable repairs.
- CAN-Bus wire repairs