Roof latch wont unlock. No lights flashing.SOLVED

[BioVizor]

Good day, everyone!

After the winter period, my roof has stopped functioning. There is absolutely no reaction when I press the buttons: the lights don’t turn on, the windows don’t go down, and the motors are silent.

Here’s what I have already checked and done:

Checked the micro switch in the trunk — everything is fine.
Inspected fuses 12, 31, and 55 — they are intact.
Charged the battery and then replaced it with a new one — no changes noticed.
Tried to initialize the window lifters using all available methods from the internet — without success.
When I removed fuse 31 with the ignition on and then put it back, the roof lights briefly lit up.
Checked the red flag in the trunk — it’s in order.
Opened and closed the roof manually — no problems.
What I have figured out:

The initialization of the window lifters probably doesn’t work since the glass doesn’t rise automatically.
I noticed that folding the side mirrors also doesn’t function: the fuse is intact, the windows are adjustable, but the mirrors don’t fold.
I realized that I can’t handle this without outside help!
I kindly ask for your assistance and advice! A new cable and roof control module should arrive soon, but I have doubts that this will solve the problem.

Thank you in advance for any help!

I'M READY FOR SUMMER! I solved the problem! It was all his fault(CONVERTIBLE TOP LIFT CONTROL MODULE). I replaced it with a new one and couldn't believe that the roof started folding and closing! Thank you all for your help! I hope to share only positive posts from now on!

 

[StudioWizard]

What a coincidence! I'm also having the same problem, but with a variation. I just had my original top replaced with a Robbins Auto Top. The top was working fine with the original top, but now pressing the buttons does nothing. One tech thinks it's the micro switches as you mentioned, but hasn't been able to verify yet. Manually opening the roof a little bit allows the open button to open the top the rest of the way, but we stopped working on it for now....

Sorry I can't provide answers, but I do want to follow this thread and if I find out something, I will post it here.

 

[Jas- USA]

The windows are tied into the convertible top system. Reading what's been attempted to fix these problems I'm not sure if you have attempted to reset the windows (we may use different terms for resetting the windows). Anyway, I believe there are a number of ways to reset the windows on the internet, I'm not sure why, maybe it is caused by the year the Z4 was made. So, google resetting Z4 e85 windows and try all the methods that come up.

 

[enuff_zed]

The windows are tied into the convertible top system. Reading what's been attempted to fix these problems I'm not sure if you have attempted to reset the windows (we may use different terms for resetting the windows). Anyway, I believe there are a number of ways to reset the windows on the internet, I'm not sure why, maybe it is caused by the year the Z4 was made. So, google resetting Z4 e85 windows and try all the methods that come up.

One way to check that is to try lowering the roof with the doors open. Then the roof doesn't care where the windows are.

 

[StudioWizard]

Ah! Good idea!

 

[StudioWizard]

Alas, it didn't work. I also tried resetting the windows and no luck.
Yesterday, the installer manually opened the top just enough to get it unlatched, then the open/close buttons worked. So, something is preventing it from initiating the open. He thinks it could be one of the microswitches....

 

[enuff_zed]

Alas, it didn't work. I also tried resetting the windows and no luck.
Yesterday, the installer manually opened the top just enough to get it unlatched, then the open/close buttons worked. So, something is preventing it from initiating the open. He thinks it could be one of the microswitches....

Ah ok, that sounds more plausible.
Or............. have you tried a replacement control module?

 

[StudioWizard]

I'm not familiar with the control module. Is it for the top?

Also, the day before the top was installed, it worked fine. The new top was then installed and now it has problems. ChatGPT says the problem could be "possibly due to fabric tension, cable routing, or bow misalignment."

 

[bigwinn]

Have you tried opening the roof manually- unlatch using the Allen key, moving it open by using the bypass?

I’ve had instances where the roof thinks it in the wrong place after major works, putting it in an alternate position then lets it work?

 

[enuff_zed]

I'm not familiar with the control module. Is it for the top?

Also, the day before the top was installed, it worked fine. The new top was then installed and now it has problems. ChatGPT says the problem could be "possibly due to fabric tension, cable routing, or bow misalignment."

Control module is a small white box, about the size of a cigarette packet, fitted in behind the small grille bewhind the lefthand seat.
However, [ref]bigwinn[/ref] has a very valid point. It is also possible that the two hall sensors on the left hydraulic hinge have been knocked and are misaligned. With the roof down you can see one (looks about the size of a sugar cube). This is the one that signals the roof is fully up. The other one is directly below it and not so easy to see.

 

[StudioWizard]

Have you tried opening the roof manually- unlatch using the Allen key, moving it open by using the bypass?

I’ve had instances where the roof thinks it in the wrong place after major works, putting it in an alternate position then lets it work?

Yes, see my post above.... opening it up even just one inch allows the buttons to function. Any idea why?

 

[StudioWizard]

And when it closes via the close button, it's back to not working....

 

[bigwinn]

I’m thinking that it’s something to do with the 2x hall sensors at the top of the screen

Or…

A cable break, which only breaks when it’s closed and under more tension

 

[StudioWizard]

When you say "cable", do you mean like an electrical wire or something like a tension rope?

 

[bigwinn]

Actual loom- the loom that is made of cable that run up the side of the roof

 

[BioVizor]

[youtube]https://youtube.com/shorts/lIDrs-Rucr0?si=ThJf9z5l_GSaPIq2[/youtube]

 

[StudioWizard]

[youtube]https://youtube.com/shorts/lIDrs-Rucr0?si=ThJf9z5l_GSaPIq2[/youtube]

What did he do? Did he unlock the boot with the key in the lock? I'm not sure what I'm seeing here....

Also, mine works if the top is open or unlatched at all. It just want start if it's latched closed.

 

[Jas- USA]

I'm sort of glad that I'm not the only person confused by that video.

StudioWizard This is mostly a UK Z4 forum. The term LOOM is a jargon term used often in the UK for mutable wiring encasements. In the USA we generally refer to them as wiring Harness's. The advice already given by others is spot on and totally correct, either your wiring harness which runs from the convertible controller to your sensors is/was damaged or the sensors were damaged/are out of position. This may have happened when changing the cloth top.

 

[StudioWizard]

I'm sort of glad that I'm not the only person confused by that video.

Haha!

[/quote]
StudioWizard This is mostly a UK Z4 forum. The term LOOM is a jargon term used often in the UK for mutable wiring encasements. In the USA we generally refer to them as wiring Harness's. The advice already given by others is spot on and totally correct, either your wiring harness which runs from the convertible controller to your sensors is/was damaged or the sensors were damaged/are out of position. This may have happened when changing the cloth top.
[/quote]

Thanks for the explanation!!