Acura or Honda Head units pinouts  > Honda pinouts

Head unit pinout abbreviations

Pin
Notation
Pin function

Power pins

B+ 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.
iLLUM Backlight adjustment. +12V supplied to head unit when tail lights ar turned on.

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- The corresponding speaker ground
LINE OUT, LINE-OUT LF, LINE-OUT RF, LIN, LIN-R, LIN-L Audio line out
LINE IN Audio line in

Misc. pins

MUTE This pin is used to silence the audio, earthed by some other external components that is connected to the radio.

 

20 pin Honda Head unit CN701 proprietary of Honda 2SF0 connector layout
20 pin Honda Head unit CN701 proprietary connector
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