Roof won't complete opening and then doesn't close

[celso_pt]

Hi guys,

I'm sorry to open another issue but I'm tired of looking around and I can't see any other issue that matches mine. I replaced the hydraulic fluid (all of it) and been around all the microswitches and simply can't understand what's wrong with it. The car is from 2001 and obviously it was closed the whole winter. It always had issues but now it just doesn't work.I'll try to describe it step by step.

- The roof starts retracting and stops half way (not new, did this before and it worked, just release and pull again to continue)
- After passing through this middle phase, it seems that the roof goes down faster than the hydraulic system (falling like) with a mix of working noise and silence.
-Once it's down, the parcel shelf doesn't come on, even though the microswitch is pressed.

At this point it doesn't open, or close, any action beeps and the boot lid is still open and parcel shelf down. I always have to take it up by hand and then once it's up, I can finish the closure procedure electronically.

This really seems that the system lost track of the roof position and since the roof is down with the parcel shelf microswitch pressed it assumes it can't move anywhere as something is trapped. (if it's that clever)

I had my friend over who pushed (forced) the lid down but in this instance the parcel shelf was up and still stuck with the lid open.

I also unplugged the roof module and left it unplugged for a good 15 minutes and the behaviour remains the same.

After all this, my guess would be that the system doesn't have enough hydraulic pressure (hence the roof "falling") I replaced the fluid and the level previous to this change was OK, anyway the behaviour is the same.

Do you have any other idea? anything I didn't check, anything I can manually simulate to see if it goes through. Any reset sequence that doesn't involve fully open the roof (since I can't)?

I appreciate any help you can give. If you know/followed someone with the same problem and I it was fixed in this forum please accept my apologies and forward me to said post.

Kind Regards
Celso

[Capncol]

Have you checked the pressure relief valve is tight?

[celso_pt]

Hi Col,

Thank you for replying.
Do you mean the Hex screw we have to undo to manually put the roof up?
If yes, then yes, I tightened it.
I wanted to add that this behaviour was repeated many times and every time I had to put it up manually from the stuck point I mentioned above.

Kind Regards
Celso

[celso_pt]

I would also like to add that the roof beeps 3 to 4 times on a cycle to open.
1 half way and 2 others (usually) until the roof is down.
I checked the functionality of the switches again and they're all working, tried to manipulate them by hand and no success.
Topped up the oil again as it wasn't full and now it's a bit better.
There are no leaks and no broken wires.
I believe that it's de-synchronized, is there any sequence to synchronize it while closed? Is there any procedure to bleed the system as well?

[leegsi]

How 'Full' is it as there are upper and lower marks rather than full

[celso_pt]

I've seen the post for the levels. It's not 'full' it's just fine.

[Capncol]

Sounds like the pump is not producing enough pressure or there is air in the system.

The roof relies on certain timings between various phases of roof opening/closing.
If the roof is moving too slowly and the next microswitch isn't tripped in the time expected, the operation will stop (just like your mid opening stop where you release the switch, then carry on)
As the roof goes "over centre" and starts go into boot, the weight takes over and it sort of collapses into boot.
Try a manual up & down a couple of times to purge any air, failing that you may need a new pump

[celso_pt]

So just moving it up and down purges the system?
how does the air go out? If I replace the pump, I'll defenitely have to bleed the system. How would that be done? Same way?

[Capncol]

If you have a small air pocket, it will usually be forced back to the reservoir.

[celso_pt]

Hi,

I tried lifting and retracting the roof many times and it didn't work.
From time to time, the parcel shelf goes up but there are others when it doesn't go up.
There's also a big cracking noise when it does come up.
It seemed that the procedure went through to the lowering the boot lid but it stops immediately.
Does anyone know about a procedure to replace the pump? (with pictures preferentially)

I think this will be my next step if you guys don't have a cheaper guess on what's going on.

Kind Regards
Celso

[Capncol]

"There's also a big cracking noise when it does come up"
Is the parcel shelf fouling on something?

[celso_pt]

No,
the parcel shelf is fine, I can pull it easy (when it has no pressure) I believe the issue is on the boot lid or pump. I bought a pump on ebay and will try to replace it next weekend. I was hopping you guys could forward me to some DIY post to help me on this.

[celso_pt]

It was a microswitch
I replaced the pump anyway (since I did that first).
Thanks for all the help and if anyone wants a working pump let me know because now I have a spare one.