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52 pin Volkswagen Quadlock connector layout
52 pin Volkswagen Quadlock connector
MOST unit (I8D), p/n 8V0035874B

Connectors from (let to right) are AM/FM1/FM2 (white), DAB or SDARS (depending on configuration), display unit (purple), external audio source (brown), GPS (blue), MOST bus (black), multi-pin.

52 multi-pin connector

Pin
Number
Description
A1 Loudspeaker (+), rear right
A2 Loudspeaker (+), front right
A3 Loudspeaker (+), front left
A4 Loudspeaker (+), rear left
A5 Loudspeaker (–), rear right
A6 Loudspeaker (–), front right
A7 Loudspeaker (–), front left
A8 Loudspeaker (–), rear left
A9 Subwoofer (+)
A10 Centre loudspeaker (+)
A13 Subwoofer (-)
A14 Centre loudspeaker (-)
A17 Terminal 31
A18 Terminal 30
Pin
Number
Description
B1 Microphone input (+) from microphone unit in front roof module (telephone microphone )
B4 NF (+) (low frequency) from pre-fitted components for mobile phone installation
B5 NF mute
B6 FBAS wire (-) from reversing camera system control unit
B7 Microphone input (–) from microphone unit in front roof module (telephone microphone)
B10 NF (-) (low frequency) from pre-fitted components for mobile phone installation
B12 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 (+)
C10 FBAS (-)
C11 iPod data
C12 iPod data
Pin
Number
Description
E1 CAN bus High to multimedia system operating unit / display unit for front information display and operating unit  control unit
E2 Reset to multimedia system operating unit
E3 Open circuit diagnostic lead
E5 Switch-on signal to telephone bracket
E6 CAN bus High, infotament
E7 CAN bus Low to multimedia system operating unit / display unit for front information display and operating unit  control unit
E8 Reset from multimedia system operating unit
E11 Status signal from telephone bracket
E12 CAN bus Low, infotament

4 pin brown connector

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

4 pin purple connector for display unit

Pin
Number
Description
1 LVDS (–)
2 LIN
3 LVDS (+)
4 Earth

 

4 pin Head Unit LVDS shaped connector layout
4 pin Head Unit LVDS shaped connector
According to 1 reports in our database (1 positive and 0 negative) the Audi (2013-2016) A3, S3, RS3 8V MMI unit pinout should be correct.

Is this pinout
Audi (2013-2016) A3, S3, RS3 8V MMI unit visual pinout:click to enlarge
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