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Home >> Audi >> 2021 >> A4 Quattro Premium Plus, 2.0L Eng VIN B >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Communication (1 Of 2) >> 91 Communication >> Telephone System >> Overview - Microphone Unit

Overview - Microphone Unit

One microphone (Interior Microphone -R74-) is connected directly to the Digital Sound System Control Module -J525-. The other microphones are connected to the Information Electronics Control Module 1 -J794-.

For IW3, the Left Front Microphone -R140- is connected to the Data Bus on Board Diagnostic Interface -J533- and for 9ZE, are >>looped through<< on the Information Electronics Control Module 1 -J794-.

GWWA91-12421Courtesy of AUDI OF AMERICA, LLC
  1. Front Interior Lamp -W1-
  2. 4-Pin Connector -T4dc-, Black
  3. Interior Microphone -R74-
  4. Right Front Microphone -R141-
  5. Left Front Microphone -R140-

Microphone Unit in Front Roof Module -R164-, Removing and Installing. Refer to Microphone Unit in Front Roof Module -R164-, REMOVING AND INSTALLING .