Roof issue (not the usual) calling No.5 FIXED!!!

[bigwinn]

Your hinge lifters are failing. The top will come down but, your system no longer has the need pressure to raise the weight of the top.

Note: Although unusual, your emergency by-pass system within the pump could also be stuck half open.

Both failing hinge lifters or a stuck half open emergency by-pass can cause a loss in pressure need to raise the top of a Z4.

This video has a long winded beginning. However, the guy in the video shows the hinge lifter issue which effected his Z4.

https://www.youtube.com/watch?v=ecfkS5NDa0U&t=37s

As a quick simple check and elimination, I'd first swap the ports and polarity over to see if the problem moves from going up to dropping down

i'm still sure its a wire break in that loom from the front of roof to the loom disappearing into the motor area- purely as when I move the loom, the issue goes away (assume I am rejoining the break in the wire)

I've got Mark Plants INPA to run some tests to see what codes are thrown and if its an open circuit but I am fairly convinced

[Number5]

i'm still sure its a wire break in that loom from the front of roof to the loom disappearing into the motor area- purely as when I move the loom, the issue goes away (assume I am rejoining the break in the wire)

I've got Mark Plants INPA to run some tests to see what codes are thrown and if its an open circuit but I am fairly convinced

Yes sounds good. Changing the lifters is a nightmare and would be my last resort

[bigwinn]

As suspected- a very slight wire break which still allowed intermittent voltage flow

Cut
Spliced
Soldered
Heat shrunk
Protected

Sorted

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[markplant]

Did it throw any codes

[bigwinn]

Nothing- it was in a ‘working ok’ mood today

I think the heat helped

I’ll get that inpa back to you

Think I’m in Ollerton weds and fri- you around?

[markplant]

I'll let you , but no rush if you want to have a play round with it for a bit

[mr.mindless]

I suspect I've got the exact same issue, since my top stops working once it closes just a hair.

Is there an accessible other end to that roof harness to just check continuity to confirm that a wire is broken before stripping the inner fabric?
Mike

[tedvadala]

broken wire i had mine just fixit

[tedvadala]

broken wire i had mine just fixit

[Zulu4]

In case it helps someone, I have been having a few roof issues after removing and refitting the parcel shelf.
Eventually the roof got stuck down with no lights showing on the roof buttons when pressed. It seemed completely dead.
I connected INPA and it showed a fault:

20220518_185547.jpg (96.13 KiB) Viewed 356 times

With INPA, I tried to close the roof. It moved the windows and there was a whirr from the rear but nothing else happened.

I thought either the control panel was faulty or I'd got Bigwinn's broken wire problem.

Just before stripping the roof to check the wiring, I thought I'd try a hard reset by disconnecting & reconnecting the battery.

Hey presto, it fixed the problem. Presumably with me fiddling with the parcel shelf and manually moving the roof (whilst trying to get the infamous clips back in) I must have confused the car's brain or the gaptech into not knowing the position of the roof.

[bigwinn]

In case it helps someone, I have been having a few roof issues after removing and refitting the parcel shelf.
Eventually the roof got stuck down with no lights showing on the roof buttons when pressed. It seemed completely dead.
I connected INPA and it showed a fault:
20220518_185547.jpg
With INPA, I tried to close the roof. It moved the windows and there was a whirr from the rear but nothing else happened.

I thought either the control panel was faulty or I'd got Bigwinn's broken wire problem.

Just before stripping the roof to check the wiring, I thought I'd try a hard reset by disconnecting & reconnecting the battery.

Hey presto, it fixed the problem. Presumably with me fiddling with the parcel shelf and manually moving the roof (whilst trying to get the infamous clips back in) I must have confused the car's brain or the gaptech into not knowing the position of the roof.

I think Martin had similar recently with a similar issue- his reset was that the windows needed to re learn the anti trap

[Zulu4]

I found it interesting that in INPA you can view how many times the roof has been cycled in its life.
Mine is up to 1560.

I wonder what the record is ?

[bigwinn]

I found it interesting that in INPA you can view how many times the roof has been cycled in its life.
Mine is up to 1560.

I wonder what the record is ?

off outside with laptop under arm to have a look...

I still need to get to the bottom of converting INPA into english despite changing every INPA.file to english from german

grrrr

[Zulu4]

Another update. The roof stopped working again.

I shorted the parcel shelf microswitch to see if that was the problem. No joy.

Then I removed the Gaptech - fixed . But now no easy opening/closing
I'll see if I can live without a Gaptech, otherwise I suppose it's full price for another.

I think the Gaptech was constantly giving the roof a signal to open i.e the " 'Offnen' permanent auf GND", in the error message above.

[jimbo1958]

Had a different issue with the Gaptech which was causing a parasitic drain.....once removed no more problems.