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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 07-24-2007, 08:31 PM   #1 (permalink)
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E36, Control Unit Power Supply Question

Hey guys, Noobie here with a question about an error code.

My airbag light came on I was told the steering wheel airbag needed replacing by the stealership. After replacing the airbag the light was turned off and came back on. Now it is saying "Control Unit-Power Supply". Does anyone know what this means? I followed correct procedure for steering wheel airbag replacement and this code was not coming up when they checked the light the first time. Could something have tripped this light during the replacement process? Also can this light be turned off without the diagnostic module? Thanks for your help.
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Old 07-24-2007, 11:24 PM   #2 (permalink)
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it ususally comes on whenever the battery has been disconnected for a period of time, clear it and see what happens, if it comes back let us know, if not, enjoy =]

you'll need a code reader to clear the code, autozone does it for free
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Old 07-25-2007, 08:19 AM   #3 (permalink)
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Thanks Shahab, You would think that the BMW Tech I took it too would have known that. I will take it to the local Auto Zone and have them reset. Thanks again
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Old 07-26-2007, 10:24 PM   #4 (permalink)
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Well, Autozone says they only do the code check for cars 96 and up. I guess I am out of luck since my E36 is a 95. How much is the code reader? Cheaper then what the stealership is going to charge me for the diagnostic?
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Old 07-30-2007, 09:24 PM   #5 (permalink)
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Well, I tried taking the bulb out of the dash. And would you believe it without the bulb the light is still illuminated. So I figured I am going to ask the dealership to just turn the light off and insist that they not charge me for the diagnostic.
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