Automotive Head units pinouts  > Yamaha pinouts

 

Meaning of Head Unit pinout signals

Pin
Notation
Pin function

Power pins

BAT Battery+  (12V direct from Battery). 
GND, GROUND Chassis Ground
ACC Ignition powered. +12 V with the ignition key is in the ACC or ON position.
ANT Power for Electric Antenna. Output +12 V (maximum 150 - 300mA) 

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
LINE OUT, LINE-OUT LF, LINE-OUT RF, LIN, LIN-R, LIN-L Audio line out
12 pin head unit proprietary of Yamaha YM-9900RC connector layout
12 pin head unit proprietary connector
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