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Thread: the dsc abs lights with strange fualt

  1. #1
    Join Date
    Sep 2017
    Location
    newzealand
    Posts
    5
    My Cars
    1999 540i msport

    the dsc abs lights with strange fualt

    Hi all been looking at all threads to try and find out whats up. I have what they call the 3 lights however a strange fault. the lights came on the other day when driving so left it on over night with battery disconnected hooked it up and still got lights on get out of driveway and lights go off drive it stop for a while shopping get in drive down the road and lights come back on. so thinking it the abs module however the speedo is all good and so is cruse control the strange thing is sometimes it will stay in 3rd gear as in 1st 2nd and then into 3rd .(will go through all gears in manual mode). had it read main fault says DSC return pump fault car was driven whith code reader checking wheel speed sensor's they are all good.. so any help b good.

    car is a 1999 540i msport done 140,000 km

    Cheers Noel

  2. #2
    Join Date
    Oct 2017
    Location
    Beaverton, Oregon, USA
    Posts
    1,694
    My Cars
    2001 E39 540i A, 207 k

  3. #3
    Join Date
    Sep 2017
    Location
    newzealand
    Posts
    5
    My Cars
    1999 540i msport
    thanks chedley will have a look

  4. #4
    Join Date
    Sep 2017
    Location
    newzealand
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    5
    My Cars
    1999 540i msport
    still finding it hard to find why I have the problem with the transmission has anyone else had this

  5. #5
    Join Date
    May 2010
    Location
    Allentown, PA
    Posts
    893
    My Cars
    1997 528 Auto 03/'96 M52
    You mentioned your wheel speed sensors checked good with a scanner? I had the same issue and it turned out to be a wheel speed sensor, although I did get a code for a WSS.

  6. #6
    Join Date
    Sep 2017
    Location
    newzealand
    Posts
    5
    My Cars
    1999 540i msport
    yep shop did a cheek while driving the car all speed sensors read the same, only code was dsc return pump fault so will start there then if nobody had this happen

  7. #7
    Join Date
    Jan 2014
    Location
    Buenos Aires, Argentina
    Posts
    4,544
    My Cars
    '97 523i5 - 99' 540iA
    Maybe it's 2 separate issues. Sometimes when the transmission thermistor is bad or the tranny is overheating, there's a "hardware" limp mode that will behave similar to your description. It will shift 1st. to 2nd over 3500 rpm then stay there almost until redline. It will shift manually but it won't hold any gear higher than 3rd. and you won't have the S mode indicator. If this is the case, your transmission needs an oil change (it's already been overheated and the fluid has lost properties) and revising the heath exchanger/thermostat assembly.
    Diehard E39 driver.
    I'd rather die or take a walk before driving an E60 or any BMW made after Y2K.
    ​"Your momma's so ugly she makes Bangle cars look nice"

  8. #8
    Join Date
    Sep 2017
    Location
    newzealand
    Posts
    5
    My Cars
    1999 540i msport
    thanks will look into that as well

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