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16 pin (10+6) Toyota Head Unit proprietary connector layout
16 pin (10+6) Toyota Head Unit proprietary connector
at the audio unit
p/n 86120-0E220-C0, 86120-48E40-C0

16 pin Main Audio

Pin
Number
Pin Function Details wire color
A1 FR+ Sound signal (Front Right)   LG
A2 FL+ Sound signal (Front Left)   P
A3 ACC Accessory (ON) Ignition switch on (ACC)  =>11 to 14 V GR
A4 B+ Battery   B
A5 FR- Sound signal (Front Right)   L
A6 FL- Sound signal (Front Left)   V
A7 GND Ground   W-B
A8 ANT Power source of antenna Radio switch ON and AM or FM => 11 to 14 V B
A10 ILL+ Illumination signal   G
B1 RR+ Sound signal (RearRight)   R
B2 RL+ Sound signal (RearLeft)   B
B3 RR- Sound signal (RearRight)   W
B5 ILL-     W
B6 RL- Sound signal (RearLeft)   Y

Pin
Number
Pin Function Details wire color
E3 SPD Speed signal fromcombination meter   L
E6 SWG Steering pad switch ground   B
E7 SW1 Steering pad switch signal N/A >=4V
SEEK+ = 0.5 V
SEEK- = 0.9V
VOL+ = 2.0V
VOL-  = 3.4 V
O
E8 SW2 Steering pad switch signal N/A >=4V
MODE = 2.5V
V
E15 ARI Sound signal (Right) External device (When stereo jack is used) R
E16 ASGN Shield Ground   W
E17 ALI Sound signal (Left) External device (When stereo jack is used) B
E18 AGND Shield Ground    
E19 AUXI External device connection detection signal   Y

 

Pin
Number
Pin Function Details wire color
1 CSLD Shield Ground    
2 CDR+ RSE Sound Signal (only w/ Rear Seat Entertainment System)   BR
3 CDR-   SB
4 CDL+   LG
5 CDL-   P
6 MUTE   RSE system is playing => Above 3.5 V
RSE system ischanging mode => Below 1 V
B
9 TXM+ AVC-LAN communication signal   Y
10 TXM-   BR
20 pin Lexus/Toyota Head Unit accesory proprietary connector layout
20 pin Lexus/Toyota Head Unit accesory proprietary connector
at the head unit
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Toyota Highlander (2008-2013) 51857 Head Unit visual pinout:click to enlarge
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