Porsche or Volkswagen Head units pinouts  > Volkswagen pinouts

Meaning of Head Unit pinout signals

Pin
Notation
Pin function

Power pins

KL.30 Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
S-kont Ignition powered. +12 V with the ignition key is in the ACC or ON position.

Audio pins

FR+ or RF+ Front right speaker out
FL+ or LF+ Front left speaker out
RR+ Rear right speaker out
LR+ or  RL+ Rear left speaker out
FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND The corresponding speaker ground

Misc. pins

Amp, ATX+, ATX- Amplifier control
DATA, CLK Head unit communication
Alm

anti-theft alarm system

SWC Steering wheel buttons control
CAN-L, CAN-H CAN on board diagnostic bus
40 (16+12+12) pin Head Unit / Car Stereo Quadlock connector layout
40 (16+12+12) pin Head Unit / Car Stereo Quadlock connector
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Volkswagen CQ-JV1060L Head Unit visual pinout:
Volkswagen CQ-JV1060L Head Unit diagram
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