Head unit pinout abbreviations meaning
| Pin Notation | Pin function | 
|---|---|
| Power pins | |
| B+ | Battery+ (12V direct from Battery). | 
| GND, GROUND | Chassis Ground | 
| ynp | Ignition powered. +12 V with the ignition key is in the ACC or ON position. | 
| ANT+, P.ANT, ANT | Power for Electric Antenna. Output +12 V (maximum 150 - 300mA) | 
| Audio pins | |
| FR+ | Front right speaker out | 
| FL+ | Front left speaker out | 
| RR+ | Rear right speaker out | 
| LR+ | Rear left speaker out | 
| FR-, RF-, FL-, LF-, RR-, LR-, 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. | 
| BUS | Head unit communication | 
| RC | Remote control | 




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