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hello everyone, I am working on this and might need some help, I have The screen, CMU, Controller Knob and usb port with all it harness connected and I'm using a 12 v 3Amps power supply, but it doesn't turn on, just the fan for a few seconds, do I need the Body Control Module to make this work out of the car?
 

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This is just a guess, but the CMU only boots when the car is unlocked/door open, and the screen only turns on when you turn on the car (in whatever way). It may be looking for a signal to turn on the cmu/screen, similar to a power button on a computer.

Whether that comes form the BCM or not, I don’t know.
 

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hello everyone, I am working on this and might need some help, I have The screen, CMU, Controller Knob and usb port with all it harness connected and I'm using a 12 v 3Amps power supply, but it doesn't turn on, just the fan for a few seconds, do I need the Body Control Module to make this work out of the car?
The CMU and Screen need ACC and B+ to powering on. Did you connect both wire to them?
 

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Hi

I try to do this too. I have full wiring diagram for Mazda connect. For all modules there is ground, b+ and something called "PWR CTRL OUT". It's a connection between control board, display and USB hub. I can't power it all too, I'll try to power it with can message idk if this would help
 
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