Roof issues, can't access the boot. Need help pls!

cohiba_seb

New member
 Los Angeles, CA
Hey everyone,

First post here, so hopefully someone can point me in the right direction because I'm honestly losing my mind over this.

A little background on the car:

  • 2011 BMW Z4 35iS (E89)
  • ~50,000 miles
  • Completely stock
  • Roof has always worked perfectly. I use it pretty regularly and it's never even hesitated before.
So here's what happened.

Last night I was leaving my cousin's house and decided to put the top down since it was nice outside. Car was running, I pressed and held the roof open button like I always do, and everything started moving completely normally. The rear glass section folded up (First step oof cycle) and was sitting on top of the roof. The second it got to that position, it threw up "Roof movement impaired!" on the iDrive. I kept trying both the open and close buttons, held them, tried the key fob... absolutely nothing. No clicks, no pump noise, no movement whatsoever. It was like the entire roof system just died in the middle of the cycle.

I still had to get home, so I drove it (avoided the freeway because I had no idea what was going to happen). About 5 minutes into the drive, the rear glass/shell slowly lowered itself back down on top of the car by itself. It wasn't a sudden drop or anything, it just slowly settled down. The whole drive home the car kept yelling at me that the roof movement wasn't complete and that the roof wasn't locked.

The roof still won't do anything. My windows are stuck down and won't go back up as well as my trunk being completely locked. Inside button does nothing, Comfort Access does nothing, key fob does nothing. The rear glass/shell also isn't latched closed. It's sitting a few inches above where it should be and I can literally lift and wiggle it by hand.

Has anyone had this happen before or know what could've caused it? Any ideas or things I should check would be a huge help. Right now I'm pretty much stuck and don't even know where to start.

Thank you all!

Seb
 
Hi Seb and welcome to the forum, sorry to hear you are having problems with the roof, it’s probably a faulty micro switch that’s failed or a broken wire running to it, the cable degrades and eventually brakes, it really needs scanning to see what fault codes are stored, there’s loads of previous threads on the subject, try using the search function.
You can access the boot/trunk by bridging a fuse in the fuse box, see this thread.


Hope you are flexible as it in the most awkward place.
 
Hi and welcome!

Symptoms a bit like the roof issue I had as documented here resolved by replacing two micro sensors as is described. Unfortunately they can just wear out with age.

When it first happened I moved the rear glass section down by lifting it back in place (it wasn't fully secure but car was on my driveway anyway). Windows wouldn't raise initially but did so when I tried about a half hour later for whatever reason. And apparently trunk not being able to be opened is just a symptom of a roof problem - it's a failsafe since it can't detect where in the roof open/close cycle you're at. In my case, I had nothing in the trunk however if you go through the roof opening cycle, you can get to it from the back - you would need to have this access anyway to fix/replace those sensors.

As said - lots of info on the forum about roof issues so use the search facility to look through them. Here's a list of typical age-related defects by @RobbiZ4 who's the forum guru on the subject as a starter.

Also suggest that it's not a good idea to take it to BMW to diagnose/fix as they tend to not have a good reputation and/or are very costly. I guess that you could also try and seek out an independent specialist locally as an alternative to DIY.

Good luck!
 
If you have an Android phone or tablet, you can install BimmerGeeks ProTool. It can open the boot easily. Also, if you search the forum, there is a pin shorting trick you can do in the electrical panel behind the glove box.
 
Thank you @Chippie @Fady @javis20 for your response. I was finally able to get into my trunk by leveraging a BBQ poker through the ski pass and releasing the emergency latch. As far as I can tell, I do not see any issues here. As you said I do believe it to be a switch or sensor.

Here are the codes scanneed by my buddys foxwell:

A68C - Hall sensor, roof shell 2, packed.
A69E - Speed in soft top intermediate position higher than permitted.
A2CB - CON: Coding parameter invalid
?*2DED - DME: Power managment, closed-circuit current violation.

I'm going to take it to a shop tomorro and see what they can find out. Hopefully its nothing too serious. I appreciate all of your inputs!

Not sure if I missed something but that seems like the most of it!
 
So the main one is the faulty hall sensor ..a well documented and easy to fix failure..

The speed warning is simply that someone tried to operate the roof at too high a speed

The coding one is maybe a duff attempt by someone to recode ..

The current violation is a faulty shutdown of an ECU somewhere or a fault in comfort access ..or..
 
A68C - Hall sensor, roof shell 2, packed.
A69E - Speed in soft top intermediate position higher than permitted.
A2CB - CON: Coding parameter invalid
?*2DED - DME: Power managment, closed-circuit current violation.
This is exactly a broken or shorted wire in the upper bow of the rear roof shell.

So the main one is the faulty hall sensor ..a well documented and easy to fix failure..
TBH, absolutely not.
 
For me it's absoluetly clear:
A68C - Hall sensor, roof shell 2, packed.
A69E - Speed in soft top intermediate position higher than permitted.
A2CB - CON: Coding parameter invalid
?*2DED - DME: Power managment, closed-circuit current violation.
As the hall sensor in the rear roof shell never fails (up to now :-)), that's always THE clear indicator for a broken or shorted wire mostly in the upper bow, rarely in the inner bow, never in the lower and visible bow.

The 2nd code is a simple follow up when driving with a roof, that is faulty. Nonsense message, but always stored.
3rd & 4th codes: no relevance reagarding the roof.
 
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