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-   -   Seimens Bit-II to TCU with BT upgrade Help (https://xoutpost.com/electronics/bluetooth/71394-seimens-bit-ii-tcu-bt-upgrade-help.html)

mikeypx82 06-27-2016 08:36 PM

I have '05 330i that didn't come with assist or navigation. I've installed a TCU, Bluetooth antenna, and microphone. I can't get my car to detect the TCU in DIS, INPA, or NCSexpert. I've verified that my wire harness is configured for US TCU, not BIT. According to WDS pins 17 & 18 are constant power from the battery. When I test those wires I get less than 1v. Can someone test pins 17 & 18 and tell me how much voltage you are getting? Or is there a resource that shows how much voltage each wire is supposed to be getting? Any help would be greatly appreciated.

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