Pinouts >  Genuine Lexus and Toyota Car Audio Head units harness
12 pin Toyota/Lexus Head Unit proprietary connector layout
12 pin Toyota/Lexus Head Unit proprietary connector
at the head unit
Connector is placed at the rear side of genuine head unit. May be used to connect CD/MP3 player unit.
Pin Function Details
1 GND Ground
3 TX+ Transmission+
4 TX- Transmission-
5 ACC+B +12V when key is in ACC/AUX position
6 BU+B Battery +12V
7 SLD Shield/Ground
8 R+ Right Audio Input Positive
9 R- Right Audio Input Negative
10 L+ Left Audio Input Positive
11 L- Left Audio Input Negative
12 Mute Logical 1 when Radio Switch is On

 

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Toyota/Lexus (2003-2011) CD/MP3 module unit visual pinout:click to enlarge
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