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40 (16+12+12) pin QuadLock Fakra Head Unit / Car Stereo connector layout
40 (16+12+12) pin QuadLock Fakra Head Unit / Car Stereo connector
p/n 4G0035670

52 multi-pin connector

Pin
Number
Description
A3 Wake-up to multimedia system operating unit
A5 Switch-on signal to telephone bracket / aerial am‐plifier for mobile telephone
A6 Res MU to multimedia system operating unit
A7 Open circuit diagnostic lead
A9 Switch-on signal to telephone bracket
A10 Data from multimedia system operating unit
A11 Data to multimedia system operating unit
A12 Terminal 31
A13 DIAG signal from telephone bracket
A14 Res BT from multimedia system operating unit
A15 Terminal 30
Pin
Number
Description
B2 Microphone input (+) from front right microphone, microphone unit in front roof module
B3 Microphone input (-) from front right microphone, microphone unit in front roof module
B5 FBAS wire (-) from reversing camera system control unit
B8 Microphone input (+) from front left microphone, microphone unit in front roof module
B9 Microphone input (-) from front left microphone, microphone unit in front roof module
B11 FBAS wire (+) from reversing camera system control unit
Pin
Number
Description
C1 NF in, earth (low frequency)
C2 NF in, right-side (low frequency)
C3 USB (+5 V)
C4 USB (earth)
C5 iPod, ACC power
C6 Detect
C7 NF in, left-side (low frequency)
C8 NF in, screen earth (low frequency)
C9 FBAS wire (+)
C10 FBAS wire (–)
C11 iPod data
C12 iPod data

4 pin yellow connector

Pin
Number
Description
1 D (+)
2 iPod detected
3 D (–)
4 Earth

4 pin gray connector

Pin
Number
Description
1 LVDS (–)
2 LIN
3 LVDS (+)
4 Earth
  • Audi    A6 Allroad Quattro    2013-2020
  • Audi    A6/S6/Avant/Quattro    2011-2014
  • Audi    A7 Sportback    2011-2014 
  • Audi    RS6/RS6 plus/Avant Quattro    2013-2018
  • Audi    RS7 Sportback    2014-2018
4 pin Head Unit LVDS shaped connector layout
4 pin Head Unit LVDS shaped connector
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