Abbreviations of head unit pinouts
Pin Notation |
Pin function |
---|---|
Power pins |
|
Ub + | 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. |
MUTE | This pin is used to silence the audio, earthed by some other external components that is connected to the radio. |
GA | This pin is used in some radio equipment to automatically boost up the volume. It needs the output from the speed sensor. |
Audio pins |
|
RF+ | Front right audio out |
LF+ | Front left audio out |
RR+ | Rear right audio out |
RL+ | Rear left audio out |
FR-, RF-, FL-, LF-, RR-, LR-, RL- | The corresponding audio ground |
Misc. pins |
|
DATA IN, DATA OUT | Head unit communication |
K-BUS | K-line bus |
SW+B | Battery power switch |
DATA, CLOCK | Head unit communication |