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Thread: Dash lights won't turn off help!

  1. #1
    Join Date
    Jan 2019
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    Roselle, Illinois, US
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    2000 bmw 740I 93k

    Dash lights won't turn off help!

    Hey guys so my engine light, brake and abs lights came on along with the traction control light I was told it would be my wheel speed sensor I replaced the passenger rear as one wire of the sensor was cut, the only light that turned off was the check engine light. Can anyone help?

  2. #2
    Join Date
    Feb 2010
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    Hampshire UK
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    99 840ci Sport Indv
    First of all you need diagnostics to check what errors you have - but most likely you have the usual DSC module failure as described below:

    https://www.meeknet.co.uk/E38/ABS/Index.htm
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


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  3. #3
    Join Date
    Jan 2017
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    North Carolina coast
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    2001 740iL Prod 4/2000
    +1 on Timm's advice. For a while I had intermittent cruise control dropout with the 'trifecta' of lights immediately after.
    Since the cruise signal reads from the right rear, makes sense to replace that sensor? Uh...no.

    Set up INPA after a bit, and found 208 instances of the left front wheel speed sensor dropping out. Sometimes diagnostics on
    these cars are no so intuitive, given the range on connectivity they exist on.

    Accurate diagnostics and INPA are your friend.

  4. #4
    Join Date
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    The problem is the little gold wires that are spot-welded between the PCB and the PCB-substrate - the picture below shows where I had a go at re-soldering the connection at the bottom centre:



    This is the same repair that Module-Masters and other repairers make. The little wires get signals from the wheel sensors, pressure sensors and all sorts of other things. When they fail you will get an error code that references which wire has fallen off (such as a wheel sensor) - but the fault is with the DSC module.....
    Timm..2007 E64 650i Individual Sport..1999 E31 840ci Individual Sport..ex owner of 2000 E38 740..1999 E38 740i V8 M62..1998 E38 735i V8..1993 E32 730i V8..1988 E28 518i


    My BMW Repair YouTube Channel
    My Current 840ci Sport Individual
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    My E31 Repair and Information Website
    My E38 Repair and Information Website
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  5. #5
    Join Date
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    2000 bmw 740I 93k
    Also my speedometer is not working and ran out of gas on the street because fuel gauge is not accurate could this be caused by the same thing

  6. #6
    Join Date
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    E53, E38, E34, E39T
    Sounds like a bad ABS module as stated above. Also, as Timm said, best to scan the car with OE software for verification.





    Some Places remain unknown because no one has ventured forth. Others remain so because no one has ever come back......

  7. #7
    Join Date
    Jan 2019
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    Took it to my local shop in roselle IL and it ended up being another speed sensor thx guys ��

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