hello I have very recently the pioneer AVIC d3 and my problem is still not what the button to turn off the pioneer to see if you can help me thank you very much

come again?

It doesn't work?

There isn't a button to completely turn the unit off.You can put a switch on the red power wire if you want to cut it off while the car is on.

The OFF button on the source selection screen only turns off the audio/video source. The unit remains powered up to allow bluetooth and navigation functions. The only way to power off the unit is to turn off power to the red ACC power wire. And that is done either by turning off the car's ignition or by wiring in a toggle switch on that wire.