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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 7L6035191R, 7L6035191B, 7L6035191C, 7L6035191RE

16 pin Main Audio Connector 

1 Right rear speaker, positive
2 Right front speaker, positive
3 Left front speaker, positive
4 Left rear speaker, positive
5 Right rear speaker, negative
6 Right front speaker, negative
7 Left front speaker, negative
8 Left rear speaker, negative
9 CAN high
10 CAN low
11 Radio muting (during telephone use)
12 Negative connection, terminal 31
13 Connector for ignition key-controlled switching on and off (S contact)
14 Alarm system terminal (optional)
15 Positive connection, terminal 30
16 Antitheft system control signal, SAFE

12 pin connector C

1 External audio output, left
2 External audio input ground
3 Line out, left
5 Driving directions low frequency (+)
6 Telephone audio signal input, negative
7 External audio input, right
8 Line out, ground
9 Line out, right
11 Driving directions low frequency (-)
12 Telephone audio signal input,  positive


12 pin B connector

1 Headphone audio signal output, right, positive
2 CD changer, left and right port, ground
3 Headphone audio signal output, right, negative
4 CD changer, voltage supply, positive
6 CD changer, data out bus (data exchange for CD changer control from radio navigation system to CD changer)
8 CD changer, left port audio, positive
9 CD changer, right port audio, positive
10 CD Changer, control signal
11 CD changer, data in bus (data exchange for CD changer control from CD changer to radio navigation system)
12 CD changer, clock bus (internal test protocol for monitoring data flow)

18 pin connector

2 Audio signal ground
3 Audio signal ground
4 Shielding ground
5 Video signal ground
6 Video switching signal
7 Video signal ground
8 Video signal ground
9 Video signal ground
11 Audio signal, left
12 Audio signal, right
13 Shielding ground
14 Synchronization of vertical and horizontal picture signals
15 50 Hertz/60 Hertz
16 Signal input for picture signal blue
17 Signal input for picture signal green
18 Signal input for picture signal red


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Volkswagen (2002-2010) Radio Navigation System 2 Head Unit visual pinout:click to enlarge
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