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    Clock will reset overnight

    I have experienced this for a couple of days now. Every other night, not every night but every so often, after i start the car up for the first time in the morning, the clock and radio will be reset. The battery doesn't seem to be draining and there is no trouble in starting, no strain like the battery is draining off of something.

    Some mornings it will retain its values, other mornings it will not and everything is reset.

    Any ideas on what that might be? Its annoying having to reset the clock every other morning

    thanks
    '99 e46 323i - wrecked
    '87 e30 325iS - sold
    '91 e30 325i - sold
    '89 e30 M3 - fun car
    '09 e91 328i - sold
    '97 impreza - rally car - flipped
    '08 impreza - new rally car
    '01 996 tt - more fun car
    '82 Ford f350 - work truck

    #2
    loose power cable to the OBC?

    Comment


      #3
      Originally posted by dnguyen1963 View Post
      loose power cable to the OBC?
      Is the power cable to the obc the one under the dash near the firewall? I think the connector is a green color? Kind of looks like a rectangle?

      I will check this area and also see if the battery terminal connections are secure as well

      anywhere else?
      '99 e46 323i - wrecked
      '87 e30 325iS - sold
      '91 e30 325i - sold
      '89 e30 M3 - fun car
      '09 e91 328i - sold
      '97 impreza - rally car - flipped
      '08 impreza - new rally car
      '01 996 tt - more fun car
      '82 Ford f350 - work truck

      Comment


        #4
        Si board powers and performs calculations for the OBC. I would start by replacing the fuses for the OBC circuits and if problem continues, replace SI board batteries if they have never been changed.
        Owner - Bavarian Restoration
        BMW and European Electronics Repair and Restoration
        www.BavRest.com
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        Comment


          #5
          Originally posted by Gregs///M View Post
          Si board powers and performs calculations for the OBC. I would start by replacing the fuses for the OBC circuits and if problem continues, replace SI board batteries if they have never been changed.
          what about the radio resetting? When this happens, the clock not only resets but also the radio, loosing all my presets and requiring the code to turn back on
          '99 e46 323i - wrecked
          '87 e30 325iS - sold
          '91 e30 325i - sold
          '89 e30 M3 - fun car
          '09 e91 328i - sold
          '97 impreza - rally car - flipped
          '08 impreza - new rally car
          '01 996 tt - more fun car
          '82 Ford f350 - work truck

          Comment


            #6
            Originally posted by ebox86 View Post
            what about the radio resetting? When this happens, the clock not only resets but also the radio, loosing all my presets and requiring the code to turn back on
            Replace your old fuses, especially 10, 12, and 21 and any other associated with OBC and radio.
            Owner - Bavarian Restoration
            BMW and European Electronics Repair and Restoration
            www.BavRest.com
            My Feedback Thread
            Our Facebook!
            Follow our Instagram!

            Comment

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