Car make: BMW E38 750il 2001
the car is equipped with DSP. I did the installation as per the instructions:
1- The trunk CD changer 3 pin cable to the USB3.
2- The DSP converter 6 pin cable to the USB3.
3- The amplifier coaxial cable to the DSP converter.
4- The DSP converter is powered with 12V and grounded.
5- A FAT32 USB stick with 6 numbered folders is connected.
The car doesn't switch to the USB device; knowing that it switch normally to the factory CD changer when in place.
The car has a single mode button that switches between the available modes, and it discovers only FM/AM and TAPE.
I tried to update the firmware; just to verify that the device is functioning.
The USB stick light didn't light up or blink. the key was in ignition position, and there was power feeding the device.