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D4 Bluetooth AH42 10F845 AA module connected to 12VDC and MOST
This jpg shows the MOST bus connected to the AH42 10F845 AA module used in the D4 as well as +12VDC power from F58P connected. The power is split with a Y harness as the IHU (radio) for some reason required +12VDC power to the C2115-10 "mute" pin to keep the radio/CD audio from muting all the time.

With power on the pin, the radio audio does mute as it should when the cell phone rings and the hands free connects. The brown conductor feeds to C2115-10 and the blue to the module.

The module tucks up and hides behind the grey plastic section covering the forward portion of the passenger side tranny hump for left hand drive vehicles; for RHD, it would be located on the left side.

The pairing code is 2121 with this setup and not 1234 or 0000.
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