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16 pin (10+6) Toyota Head Unit proprietary connector layout
16 pin (10+6) Toyota Head Unit proprietary connector
57412, Matsushita CQ-LS8180AK, p/n 86120-33460

Head unit pinout signals explained

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.
ILL Light-on signal or backlight adjustment. +12V supplied to light-on pin of head unit when tail lights ar turned on. May be used for backlight adjustment in some models.
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
Lin Line out
FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND The corresponding speaker ground

Misc. pins

T/M This pin is used to silence the audio, earthed by some other external components that is connected to the radio.
12 pin Toyota Head Unit CD Changer connector layout
12 pin Toyota Head Unit CD Changer connector
According to 1 reports in our database (1 positive and 0 negative) the Toyota (2001-2004) Head Unit pinout should be correct.

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