2nd Gen R56 Cooper S Most liked posts in thread: Help - DSC, ABS, Brake warning lights all on

  1. Qik

    Qik Well-Known Member

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    #2 Qik, Jul 20, 2016
    What's your brake fluid level looking like? What's your pedal feel like?
     
  2. DneprDave

    DneprDave Well-Known Member
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    #3 DneprDave, Jul 20, 2016
    It is unlikely that a broken brake wear sensor would kill the DSC, the circuit is supposed to fail open when the break pads wear down to the sensor, just like when the wire is cut.

    It is probably a wheel speed sensor that has failed, if just one sensor fails the DSC and the ABS will stop working and the lights will come on.
    Did your mechanic scan for codes from the OBD2?
     
  3. dchernikoff

    dchernikoff New Member

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    #4 dchernikoff, Jul 20, 2016
    Brake fluid is full. Pedal feels normal. Basically the car runs and stops fine, only thing that indicates a problem is all the warning lights...

    He did run the OBD codes, and says he got one that indicated "replace DSC". But I don't have 100% confidence with the skill or integrity of the shop, so I'm getting a second shop to run the codes too.

    -Dan
     
  4. Crashton

    Crashton Club Coordinator

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    #5 Crashton, Jul 20, 2016
    I'd bet a stale donut it is a wheel speed sensor that is dead. I had this happen to my R53 with the same symptoms. Yes you can drive like that, but I think you'd be much better off fixing it. Your abs & dsc are not presently working. You need someone who can read the code. A generic code reader won't do. A dealer or BMW/MINI shop will be able to.
     
  5. DneprDave

    DneprDave Well-Known Member
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    #6 DneprDave, Jul 20, 2016
    What was the code exactly?
     
  6. dchernikoff

    dchernikoff New Member

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    #7 dchernikoff, Jul 20, 2016
    The shop is a licensced BMW/Mini repair shop -- they have access to the Mini service websites, etc, and were able to read the codes. Here they are:

    Before they replaced the broken brake sensor, they got:

    CONFIRMED CUSTOMERS COMPLAINT, NEXT PERFORM VEHICLE SHORT TEST, VERIFIED ALL
    CONTROL UNITS RESPONDING. INTERROGATE FAULT MEMORY OF ALL CONTROL UNITS. NOTED
    THE FAULTS BELOW. ADDITIONALLY, PERFORMED TEST PLANS FOR FAULTS STORED AS PER
    FACTORY DIAGNOSTIC EQUIPMENT.
    1) FAULT CODE: DSC, 5DAE, BRAKE FLUID TOO LOW
    2) FAULT CODE: DSC, 5DE6, BRAKE PAD WEAR INDICATOR, REAR: SIGNAL IMPLAUSIBLE
    3) FAULT CODE: DSC, DE04, WHEEL SPEED SENSOR, SIGNAL, FRONT LEFT, FAILS
    4) FAULT CODE: DSC, 5E05, WHEEL SPEED SENSOR, SIGNAL, RIGHT LEFT, FAILS
    5) FAULT CODE: DSC, 5E2C, CONTROL UNIT SUPPLY
    6) FAULT CODE: DSC, 5E30, DSC CONTROL UNIT, VOLTAGE FAULT, UNDERVOLTAGE
    7) FAULT CODE: DSC, 5E31, DSC CONTROL UNIT, VOLTAGE FAULT, UNDERVOLTAGE
    8) FAULT CODE: DSC, 5E32, DSC CONTROL UNIT, VOLTAGE FAULT, UNDERVOLTAGE
    9) FAULT CODE: DSC, 5E5C, DSC BRAKE PAD WEAR INDICATOR, FRONT, BRAKE PAD
    10) FAULT CODE: DSC, 5E5D, DSC BRAKE PAD WEAR INDICATOR, REAR, BRAKE PAD
    FOR DETAILS ON FAULT CODES ABOVE, SEE PRINTOUT.

    Then the replaced the sensor and battery, topped up the brake fluid, drove it around, and got:

    DURING QC ROAD TEST QC TECH NOTED DSC/ABS LIGHT CAME BACK ON. CHECK AND REPORT.

    CHECKED DSC FAULT MEMORY AND FAULT CODE 5E2C CAME BACK, PERFORMED TEST PLANS
    FOR FAULTS STORED AS PER FACTORY DIAGNOSTIC EQUIPMENT AND TRACE TO FAULTY DSC
    CONTROL UNIT. RECOMMEND AND PROGRAM DSC CONTROL UNIT AND THEN RECHECK.

    Thanks for your help guys!

    -Dan
     
  7. Dave.0

    Dave.0 Helix & RMW Powered
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    #8 Dave.0, Jul 20, 2016
    If everything is working fine and you just hate the light just take out the Speedo and put a small piece of 3M black electrical tape on the back side of the Speedo light.

    Stupid warning light issue resolved for a couple of bucks and 1 hour of your labor. :rolleyes::lol::ihih::Thumbsup:
     
  8. BlimeyCabrio

    BlimeyCabrio Oscar Goldman of MINIs
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    #9 BlimeyCabrio, Jul 21, 2016
    Well from the real live BMW diagnostic codes, clearly everything is NOT working right.

    The question I'd have is did any other codes recur after driving, or just the 5E2C code as the notes say.
    Possibilities are:
    * bad DSC control unit as they say (which will most likely prevent ABS from functioning - you can test it by braking hard in a safe location and seeing if ABS kicks in. On a gravel road or parking lot works well for testing)
    * one of the fuses supplying power to DSC unit is bad (there may be multiple fuses, I'm not sure for 2nd gen cars. At least some power is getting to the unit, or it wouldn't be reporting the errors
    * intermittent / dirty connection to the DSC unit. I've had this problem before, main harness connector that plugs into DSC got wet or corroded, I cleaned and reinstalled and it resolved the issue
     
  9. dchernikoff

    dchernikoff New Member

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    #10 dchernikoff, Jul 21, 2016
    Great info and ideas -- thank you so much! I may print this out and show it to the tech next week when I take the car in. I would SO love this to be something simple like a dirty connector! I'll let everyone know what the new guy says.

    -Dan