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      09-22-2021, 04:10 PM   #3
deltafivenine
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Drives: 2011 E90 M3 Competition, LC100
Join Date: Aug 2021
Location: KY

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Quote:
Originally Posted by ctuna View Post
Before you do any troubleshooting on these cars you must be sure
you have a fully charged and good battery and that the alternator
voltage is neither to low or to high.
Because if the are it can cause all kinds of Ghost problems.

Check battery voltage without the Engine Running and Check alternator voltage
with the engine running.
Just checked, had 12.25V at the battery with the car off and 14.29V at the battery with the car on. Would think 14.29 is good to go considering it was read at the battery, not the alt itself.

However, the bluetooth was actually working when I got into the car and the light out of the MOST diagnostics port was bright. When I was troubleshooting things I did not have the engine running, so might even be possible that the dim light out of the diagnostics port was due to lower voltage from not running the car?

At this point, not sure if it now working would be due to me fiddling with MOST connectors last night, an intermittent voltage issue, intermittent break etc. Will check alternator volts again if it ends up giving me issues next time I drive it.

Thanks for the help so far.
Appreciate 0