Thread: Combox upgrade
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      08-07-2021, 02:38 PM   #3
barritt
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Drives: 135i
Join Date: Nov 2019
Location: Washington, D.C.

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Well, did some more review of threads and found the pinout data. Did some continuity testing and found the pins for the microphone were on the connector labeled for the TCU. I took chance and reversed the TCU and MULF connector on the harness and now everything works. Looks like the harness connectors may have been miss labeled, or I just got them backwards on initial install.

Even did a voice command call to my wife and it showed her picture on the screen from the phone contacts.

So, problem solved.
Appreciate 2