BMW 530D GT Grand Turismo parking brake error

Discussion in '5 Series' started by Bobby Fisher, Oct 30, 2020.

  1. Bobby Fisher
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    Bobby Fisher

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    Hello folks!. Have already been to my local BMW dealer and they have tried replacing the gear selector, which didn't help. The next thing they offered was to drain the gearbox oil and look inside the AT Mechatronics unit and look for metal bits that could be shorting something in there. Will only cost £5 - 6k but the fix is not guaranteed. I think the guy was clueless and there must be a much simpler solution to this annoying issue. Please check out the YouTube video I have uploaded for the symptoms. Basically it's a parking brake warning. The parking brake itself appears to be working fine but the audio warning drives me crazy! I wish that I could at least switch it off.

    The video:




    I have run ISTA+ (Rheingold) diagnostics from my laptop + e-net cable - can see no parking brake related errors there.

    Thanks for reading - hopefully someone more knowledgeable than me will have some idea where I can look for a solution
     
    Last edited: Nov 2, 2020
  2. markyboyt
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    markyboyt

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    What faults do you have in other units in ISTA?
    Was any work carried out on anything in the weeks prior to the fault first occurring?
    If you shift to drive or reverse does it then work correctly? What if you shift to neutral?
     
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  3. xyzl
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    xyzl

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    You don’t mention the cars build date but there have been hardware problems with the electro mechanical parking brake switches on the F01 7 series (which shared components with the GT) and X5s causing erroneous check control messages even though the parking brake system was working correctly https://static.nhtsa.gov/odi/tsbs/2014/MC-10148274-9999.pdf
     
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  4. markyboyt
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    markyboyt

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    The fault is showing as if the gearbox is going between park and neutral rather than an issue with the electronic parking brake (handbrake)
     
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  5. Bobby Fisher
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    Bobby Fisher

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    There are a few faults (will post here later) seemingly unrelated with the issue.

    No work was done prior to the issue. I do suspect however, the issue may have been caused/triggered by the battery the previous owner has put in. It was well underpowered and not to the specs. By the time I have figured it out and replaced it it was too late. Quite a few faults related to undervoltage have gone since, but the harm has been done I guess.

    Gear shift works absolutely fine and it drives well. When in drive, reverse or neutral I don't get the error. Only when in the P mode. A friend asked to open the door and see if i can drive but it automatically engages the parking brakes as it should. So, the only inconvenience is the error message itself. None of the car functions seem to be affected.

    Just updated the video to show when the error message stops. Have to switch to neutral first and keep the ignition on to stop the annoying sound. Not sure if it will do any harm to the car, but that's the only way apart from locking the car with with the key outside of the car.
     
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    Last edited: Oct 31, 2020
  6. Bobby Fisher
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    Bobby Fisher

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    Thanks, will check the link. Most of the car components in ISTA show build date between 9/2011 and 11/2011 if I remember correctly. If it was a known issue the dealer should have picked it up, surely. The annoying thing is they nearly had a clearance from Germany to get it fixed as a goodwill gesture at no cost to me, but due to the age of the car and potential cost implications didn't get the authorisation.
     
    Last edited: Oct 31, 2020
  7. Bobby Fisher
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    Bobby Fisher

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    That appears to be the case.
    Sometimes I think it could be a loose connection somewhere but have no clue where to check.
     
  8. Bobby Fisher
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    Bobby Fisher

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    The document from your link describes almost exactly the issue I have, but for newer June - Oct 2013 cars. Interesting.
     
  9. markyboyt
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    markyboyt

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    I wonder if it is managing to correctly engage the parking pawl in the gearbox. You could try stopping on a hill in park with the park brake released and see if the car rolls at all, not an amazing test but if it rolls it’s definitely not in park. If they’ve already replaced the gws (gear selector) then it’s likely to be an issue with the gearbox itself I would expect. I wonder if the park manual release has been wound in and not fully wound out or anything crazy like that. Wouldn’t really explain why the fault would develop without intervention though. I assume that the dealer didn’t take a sample of the gearbox oil and also check the level? that’s a pretty basic check to make before fully draining and removing the sump to view the mechatronics.
     
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  10. Bobby Fisher
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    Bobby Fisher

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    ECU Tree.JPG Fault list.JPG
     
  11. Bobby Fisher
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    Bobby Fisher

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    Just posted the fault list above and 8 out of 21 faults are related to glow plugs and are not causing any issues at the moment.

    CF2501 appears to be the only fault from EGS i.e. the parking brake issue

    Two faults related to swirl flaps and could potentially be serious I think

    :scratch:
     
  12. markyboyt
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    markyboyt

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    I would be tempted to do a fault clear on that and see what returns then recreate the issue and see if anything more returns. As you say only one fault is shown for EGS and it appears to be looking for a CAN signal from the trailer ECU which you don't appear to have fitted. Has the car got an aftermarket tow bar wiring like a Westfalia or similar with the car specific electrics kit? Doesn't look like much there would cause the problem you have though.
    The DDE relay fault is a weird one if that keeps logging but an issue with that should cause more issues.
    In EGS diagnostic requests you should be able to monitor the selected gear position and in GWS probably monitor the gear lever status, would be worth watching these when the fault is happening.
     
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  13. Bobby Fisher
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    Bobby Fisher

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    This is what came back after clearing the fault memory earlier today and driving a few miles. Just after clearing there was only one error (preheating control unit missing). Then more errors re-appeared, even though some of them are shown as not currently existing. There is a tow bar and trailer connection socket at the back Westfalia branded. This used to be a company car so I would imagine they must have installed the right kit. Plus the error wasn't present when I purchased the car. I googled the error code and came across the following suggestion:

    There is a job to reset the CAN leaned functions in the EGS - with Tool32:STEUERN_LERNFUNKTIONEN_RUECKSETZEN

    Will need to look into this. I think I have used tool32 in the past and thought it was quite straightforward.
     
  14. bmwzoom
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    bmwzoom

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    Give these guys a call and ask for Paul:

    http://suffolktransmission.com/

    I have used them for many yrs for gearbox servicing, they are very good has to be worth a call maybe?
     
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  15. Bobby Fisher
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    Bobby Fisher

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    Thanks will give them a call
     
  16. Bobby Fisher
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    Bobby Fisher

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    Left a message but they never came back. Oh well...

    By the way, is there a quick and easy way to download a digital manual for the GT? I've seen a few sites selling these and I know that a replacement handbook can be purchased from the dealer. But surely digital manuals should be freely available to download?
     
  17. Peter
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    Peter WARLORD Site Supporter

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    American BMW website used to have digital copies available for models sold in the US. Think you have to have a VIN which is recognised, to get one these days.

    Do you run the BMW Driver's Guide App? That allows you to have the exact digital 'interactive manual' on your phone/tablet. I use the App, (need to have a BMW Account which includes entering your VIN) and the guide even has my car spec, including colour and wheel style on the front page.

    Peter
     
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  18. xyzl
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    xyzl

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    slim_boy_fat WARLORD Site Supporter

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  20. Bobby Fisher
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    Bobby Fisher

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    Thank you, didn't know about this app. I never bothered registering for the connected drive services. Apparently I need to go through some security to activate it and it's required to use this app. Have sent an email to BMW with the info requested.
     

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