Manual:AUDI A3 Premium, 4D Sedan 2015Page:41789 / 92758



MMI Radio Most (I8D), Through My 2016 — 2015 Audi A3 Premium, 4D Sedan Service Manual

MMI Radio Most (I8D), Through My 2016

Information Electronics Control Module 1 J794 

Fig 1: Information Electronics Control Module 1 -J794-
GWWA91-11963Courtesy of AUDI OF AMERICA, LLC
  1. Connection, AM/FM1/FM2
  2. DAB connection from Digital Radio Antenna -R183-
  3. 4-Pin Connector -T4al- to the Front Information Display Control Head -J685-
  4. 4-Pin Connector -T4w- to the External Audio Source Connection -R199-
  5. GPS connection from Roof Antenna -R216-
  6. MOST Bus
  7. Connection Block with Four Multi-Pin Connectors

Only North America, I8D and QV3

  1. Connection, AM/FM1/FM2
  2. SDARS connection from Satellite Tuner Antenna -R172-
  3. 4-Pin Connector -T4al- to the Front Information Display Control Head -J685-
  4. 4-Pin Connector -T4w- to the External Audio Source Connection -R199-
  5. GPS connection from Roof Antenna -R216-
  6. MOST Bus
  7. Connection Block with Four Multi-Pin Connectors

1 - AM/FM1/FM2 antenna connection

Fig 2: 1 - AM/FM1/FM2 Antenna Connection
GWWA91-12103Courtesy of AUDI OF AMERICA, LLC
  1. Connector 2, AM/FM1 from Antenna Amplifier -R24-, Antenna -R11-
  2. Connector 1, FM2 from Antenna Amplifier 2 -R111- or Antenna Amplifier 3 -R112-, Radio Antenna 2 -R93-
NOTE:

Unlisted connector terminals are not assigned.

3 - 4-Pin Connector T4al

Fig 3: 2 - 5-Pin Connector -T5bp-
GWWA91-12091Courtesy of AUDI OF AMERICA, LLC

All pins are connected to the Front Information Display Control Head -J685-.

  1. LVDS (-)
  2. Not Assigned
  3. LVDS (+)
  4. Ground

4 - 4-Pin Connector T4w

Fig 4: 2 - 5-Pin Connector -T5bp-
GWWA91-12091Courtesy of AUDI OF AMERICA, LLC

All pins are connected to the External Audio Source Connection -R199-.

  1. D (+)
  2. iPod Detected
  3. D (-)
  4. Ground

6 - MOST bus

Fig 5: 2 - MOST Bus
GWWA91-11851Courtesy of AUDI OF AMERICA, LLC
  1. Input
  2. Output

7 - Connection block with four multi-pin connectors

A - 8-Pin Connector T8ag

Fig 6: A - 8-Pin Connector -T8e-
GWWA91-11645Courtesy of AUDI OF AMERICA, LLC
  1. Right Rear Speaker (+)
  2. Right Front Speaker (+)
  3. Left Front Speaker (+)
  4. Left Rear Speaker (+)
  5. Right Rear Speaker (-)
  6. Right Front Speaker (-)
  7. Left Front Speaker (-)
  8. Left Rear Speaker (-)

B - 12-Pin Connector T12x

Fig 7: A - 8-Pin Connector -T8e-
GWWA91-11645Courtesy of AUDI OF AMERICA, LLC
  1. Microphone input (+) from Microphone Unit In Front Roof Module -R164-, Telephone Microphone -R38-
  2. Not Assigned
  3. Not Assigned
  4. LF (+)
  5. LF mute
  6. CVBS cable (-) from Rearview Camera System Control Module -J772-
  7. Microphone input (-) from Microphone Unit In Front Roof Module -R164-, Telephone Microphone -R38-
  8. Not Assigned
  9. Not Assigned
  10. LF (-)
  11. Not Assigned
  12. CVBS cable (+) from Rearview Camera System Control Module -J772-

C - 12-Pin Connector T12y

Fig 8: A - 8-Pin Connector -T8e-
GWWA91-11645Courtesy of AUDI OF AMERICA, LLC

All pins are connected to the External Audio Source Connection -R199-.

  1. LF-In Ground
  2. Right LF-In
  3. USB, +5 V
  4. USB, Ground
  5. iPod, ACC Power
  6. Detect
  7. Left LF-In
  8. LF-In ground shielding
  9. CVBS cable (+)
  10. CVBS cable (-)
  11. iPod Data
  12. iPod Data

D - 8-Pin Connector T8j

Fig 9: A - 8-Pin Connector -T8e-
GWWA91-11645Courtesy of AUDI OF AMERICA, LLC

9 -  Subwoofer -R211- (+)

10 -  Center Speaker -R208- (+)

13 -  Subwoofer -R211- (-)

14 -  Center Speaker -R208- (-)

17 -  Terminal 31

18 -  Terminal 30

E - 12-Pin Connector T12w

Fig 10: A - 8-Pin Connector -T8e-
GWWA91-11645Courtesy of AUDI OF AMERICA, LLC
  1. CAN bus high to the Multimedia System Control Head -E380- /Front Information Display Control Head -J685-
  2. Reset Multimedia System Control Head -E380-
  3. Ring-Break Diagnostic Cable
  4. Not Assigned
  5. Switch-On Signal to Telephone Baseplate -R126-
  6. CAN bus high, Infotainment
  7. CAN bus low to the Multimedia System Control Head -E380- /Front Information Display Control Head -J685-
  8. Reset Information Electronics Control Module 1 -J794-) from Multimedia System Control Head -E380-
  9. Not Assigned
  10. Not Assigned
  11. Status signal from Telephone Baseplate -R126-
  12. CAN bus low, Infotainment