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20 pin Toyota Head Unit audio connector layout
20 pin Toyota Head Unit audio connector
p/n 86120-60622

Head unit pinout abbreviations

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.
ILL Light-on signal or backlight adjustment. +12V supplied to light-on pin of 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

Misc. pins

MUTE This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
Amp Amplifier control
CD-IN L+, CD-IN L-, CD-IN R+, CD-IN R- CD-changer audio


20 pin Toyota/Lexus Head Unit accesory proprietary connector layout
20 pin Toyota/Lexus Head Unit accesory proprietary connector
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Additional connector №3

12 pin Toyota/Lexus Head Unit proprietary connector layout
12 pin Toyota/Lexus Head Unit proprietary connector
Lexus LX470 (2003-2004) P1750 visual pinout:click to enlarge
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