Audi Workshop Service and Repair Manuals

MMI maximum equipment

Control unit 1 for information electronics -J794- 1 -  Connection (GSM) from radio, telephone and navigation system aerial -R52- (roof aerial) 2 -  Connection block with four multi-pin connectors 3 -  MOST bus 4 -  FBAS input from TV tuner -R78- 5 -  Multi-pin connector, 4-pin (T4am) to display unit for front information display and operating unit control unit -J685- 6 -  Multi-pin connector, 4-pin (T4ap) to connection for external audio sources -R199-/internet access control unit -J666- (from model year 2013 onwards) 7 -  Not used 8 -  GPS connection from radio, telephone and navigation system aerial -R52- (roof aerial)   Note Contacts which are not listed are not used. 2 - Connection block with four multi-pin connectors

A - Multi-pin connector, 8-pin (T8ah) 1 -  NF mute (low frequency) from pre-fitted components for mobile phone installation 2 -  Voltage supply to multimedia system operating unit -E380- 3 -  Wake-up to multimedia system operating unit -E380- 4 -  Not used 5 -  Switch-on signal to aerial amplifier for mobile telephone -R86- 6 -  Res MU to multimedia system operating unit -E380- 7 -  Open circuit diagnostic lead

B - Multi-pin connector, 12-pin (T12x) Left-hand drive vehicle 2 -  Microphone input (+) from microphone unit in front roof module -R164- (front right microphone -R141-) 3 -  Microphone input (–) from microphone unit in front roof module -R164- (front right microphone -R141-) 5 -  FBAS wire (-) from reversing camera system control unit -J772- 8 -  Microphone input (+) from microphone unit in front roof module -R164- (front left microphone -R140-) 9 -  Microphone input (-) from microphone unit in front roof module -R164- (front left microphone -R140-) 11 -  FBAS wire (+) from reversing camera system control unit -J772- Right-hand drive vehicle 2 -  Microphone input (+) from microphone unit in front roof module -R164- (front left microphone -R140-) 3 -  Microphone input (-) from microphone unit in front roof module -R164- (front left microphone -R140-) 5 -  FBAS wire (-) from reversing camera system control unit -J772- 8 -  Microphone input (+) from microphone unit in front roof module -R164- (front right microphone -R141-) 9 -  Microphone input (–) from microphone unit in front roof module -R164- (front right microphone -R141-) 11 -  FBAS wire (+) from reversing camera system control unit -J772-

C - Multi-pin connector, 12-pin (T12y) All pins are connected to the connection for external audio sources -R199-. 1 -  NF in, earth (low frequency) 2 -  NF in, right-side (low frequency) 3 -  USB (+5 V) - not with internet access control unit -J666- (from model year 2013 onwards) 4 -  USB (earth) 5 -  Not used 6 -  Detect - not with internet access control unit -J666- (from model year 2013 onwards) 7 -  NF in, left-side (low frequency) 8 -  NF in, screen earth (low frequency) 9 -  FBAS wire (+) 10 -  FBAS wire (–) 11 -  iPod data 12 -  iPod data The following pins are also connected to the internet access control unit -J666- (from model year 2013 onwards). 3 -  USB (+5 V) 4 -  USB (earth) 6 -  Detect

D - Multi-pin connector, 8-pin (T16q) 9 -  Switch-on signal to telephone bracket -R126- 10 -  Data from multimedia system operating unit -E380- 11 -  Data to multimedia system operating unit -E380- 12 -  Terminal 31 13 -  DIAG signal from telephone bracket -R126- 14 -  Res BT from multimedia system operating unit -E380- 15 -  Terminal 30 16 -  Earth to multimedia system operating unit -E380-

3 - MOST bus 1 -  Input 2 -  Output

5 - Multi-pin connector, 4-pin (T4am) All pins are connected to the display unit for front information display and operating unit control unit -J685-. 1 -  LVDS (–) 2 -  LIN 3 -  LVDS (+) 4 -  Earth

6 - Multi-pin connector, 4-pin (T4ap) All pins are connected to the connection for external audio sources -R199-/internet access control unit -J666- (from model year 2013 onwards). 1 -  D (+) 2 -  iPod detected 3 -  D (–) 4 -  Earth