1998 E38 728 - Multi info display problem(FIXED) - Page 2

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    #11
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    I think you are going to have to get the codes read for the unit

    do you have sat nav on it?
     
     

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    Yes, i'll see if i can get the codes read on monday
     
     

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    Any water in your boot at all? check well
     
     

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    The boots dry
     
     

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    Ok i think there may be a bit more to this problem than i first thought. I've just been out to the shops and the interior lights keep coming on, i press the button to turn them off and a few seconds later they come on again. Also the traction control might be playing up, coming out of tesco car park i went around the roundabout and end up drifting around it instead of driving normally when the back came out, it is cold out but wouldn't of thought it was black ice and i wasn't going fast.

    A trip to the autoelctrician is definatley on the cards for monday.
     
     

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    You got a multimeter? If yes then check the charge rate at the battery, otherwise it could go back to the ignition switch again as it has been known to cause elecy problems.

    The sparky should be able to sort it no probs though
     
     

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    Quote Originally Posted by matt_pc View Post
    Ok i think there may be a bit more to this problem than i first thought. I've just been out to the shops and the interior lights keep coming on, i press the button to turn them off and a few seconds later they come on again. Also the traction control might be playing up, coming out of tesco car park i went around the roundabout and end up drifting around it instead of driving normally when the back came out, it is cold out but wouldn't of thought it was black ice and i wasn't going fast.

    A trip to the autoelctrician is definatley on the cards for monday.
    Good plan mate!

    Get him to read the ECU fault codes

    Make sure you write down the fault codes (number and description if you can as it saves us looking it up!)
     
     

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    The sparky cant look at it until thursday. I was driving sunday and it all started working again, the phone, the radio, everything. When i stopped and tried it again it was all gone again :0(
     
     

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    Just found this while looking for solutions, the bold bits are symptoms i've had

    1999 BMW E38 735I. Multiple central display computer failures associated with other failures such as the radio cluster, multiple steering wheel controls, power steering assistance levels varying, horn intermittent, power windows intermittent, inside cabin lights funtioning at random. Brake lights appear to be on most of the time despite no pressure on the pedal. Diagnostic computer indicating strange failures despite the symptoms not being felt such as transmission failsafe mode - yet no apparanet shifting or functionality abnormalities or restrictions. Even the wipers freese or refuse at trimes. Appears to be somewhat of a voltage or power issue,. BMW did fit a voltage regulator some time ago and this did appear to have something to do with the matter. The BMW diognostic tool indicated a possible brake pressure sensing unit problem intermittently.
     
     

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    Well the autoelectrician was unable to diagnose the problem today but said its definatley loosing voltage somewhere. I forgot to ask him to write down the fault codes but he said they were a bit garbled anyway?

    He suggested taking it to beemer redeemer which is just outside of bristol and said he'd heard good things from them. Lets hope so.
     
     

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