Overview - Telephone, BLUETOOTH Hands-Free Calling, 9ZX

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The Information Electronics Control Module 1 -J794- is installed with the Microphone Unit In Front Roof Module -R164- and is part of the hands-free setup. Bluetooth is connected via the Cellular Telephone -R54-.

The Bluetooth Antenna -R152- is integrated in the Information Electronics Control Module 1 -J794-.

9ZX - Bluetooth hands-free calling in the Information Electronics Control Module 1 -J794-

Fig 1: Identifying Bluetooth Hands-Free Calling, From 1 June 2009

Courtesy of AUDI OF AMERICA, LLC

Front Information Display Control Head -J685- in center of the instrument panel
Multimedia System Control Head -E380- in the center console
Microphone Unit in Front Roof Module -R164-, Right Front Microphone -R141- in the Front Interior Lamp -W1-
Information Electronics Control Module 1 -J794- with Bluetooth Antenna -R152- inside the instrument panel
Data Bus On Board Diagnostic Interface -J533- under the rear bench seat
Digital Sound System Control Module -J525- behind the left luggage compartment trim panel

Fault finding is performed via "Guided Fault Finding" on the Vehicle Diagnostic Tester.

Antenna wires, repairing. Refer to ANTENNA WIRES, REPAIRING .

Notes on Bluetooth technology

A standardized radio connection system is used to transmit data between the Information Electronics Control Module 1 -J794- and Telephone Handset -R37- /Cellular Telephone -R54- - Bluetooth Technology.

An additional transmitter/receiver unit is installed in the Information Electronics Control Module 1 -J794-. A separate Bluetooth Antenna -R152- connects the Information Electronics Control Module 1 -J794- and Telephone Baseplate -R126- /Cellular Telephone -R54-, so that the Telephone Handset -R37- /Cellular Telephone -R54- can be operated wirelessly.

The range of the radio connection is approximately 10 m.

Notes on MOST bus

The optical Data bus "MOST bus" is used in addition to the CAN bus.

A fiber-optic cable is used as a "connecting cable". Fiber optic cables are routed inside corrugated tubes for protection.

Replace complete fiber optic cable if possible.

The front surface of the connectors must not be dirty.

If disconnecting the connectors: Attach Fiber-Optic Repair Set - Connector Protective Caps VAS 6223/9.

Fig 2: Fiber Optic Plier Repair Set VAS 6223

Courtesy of AUDI OF AMERICA, LLC

When installing fiber optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink fiber optic cables.

Repairing fiber optic cables. Refer to FIBER OPTIC CABLE .