Z4 E89 Rear hardtop part not operating correctly

Blck_Z
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Z4 E89 Rear hardtop part not operating correctly

Post by Blck_Z » Mon Dec 02, 2019 11:51 am

Hello,

I looked on the forum and I can't seem to find someone here with a similar issue as the one I have. I have managed to find two forum users on a different forum having the same issue but they said they'll go to the dealership and haven't updated the thread after fixing it.

So what happened was that I was driving with the top down a few weeks ago, it was quite warm 12-14C and I was driving through London. The top went down fine and then when I tried to put it back down, the last part of the roof -the one with the window- got stuck halfway through. I was in a parking lot, I tried to press it down but I couldn't. Eventually I turned off the engine and I was able to manually bring it down and pressing the roof close button locked it.

I tried using it again last week and the rear part with the window would only go up 10-15cm and stop there while getting roof movement impaired message. I looked for codes with Delphi and Inpa, couldn't find anything. Relays were replaced a few months ago, tried the old ones in but still no joy.

Anyone has any suggestions?

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Smartbear
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Z4 E89 Rear hardtop part not operating correctly

Post by Smartbear » Mon Dec 02, 2019 12:01 pm

If the rear window started it’s movement but stopped early that doesn’t sound like a sensor, it could be a split hose/low fluid etc
Check for leaks.
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Z4 E89 Rear hardtop part not operating correctly

Post by flybobbie » Mon Dec 02, 2019 12:31 pm

Thinking about it, when the roof starts to open it's removing it's weight off the rear boot. Perhaps something under there not quite right and the system freezes. Try pushing down on the boot as you operate the roof.
Something here might be moving as the weight comes off:
viewtopic.php?f=46&t=106166

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Z4 E89 Rear hardtop part not operating correctly

Post by Smartbear » Mon Dec 02, 2019 1:40 pm

flybobbie wrote:
Mon Dec 02, 2019 12:31 pm
Thinking about it, when the roof starts to open it's removing it's weight off the rear boot. Perhaps something under there not quite right and the system freezes. Try pushing down on the boot as you operate the roof.
Something here might be moving as the weight comes off:
viewtopic.php?f=46&t=106166
Wouldn’t that occurring flag up a sensor code though? Unplugged/open circuit would be logged wouldn’t it?
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Z4 E89 Rear hardtop part not operating correctly

Post by flybobbie » Mon Dec 02, 2019 2:04 pm

Well when i had my roof problem, the reader said there was several faulty sensors, when there were non.
I wouldn't trust the readouts or lack of to much.
Unless of course the common problem was the module that these are connected to.

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Z4 E89 Rear hardtop part not operating correctly

Post by Blck_Z » Mon Dec 02, 2019 11:17 pm

Would the hydraulic fluid smell? I was looking for a leak but couldn't find any obvious ones. I was thinking of checking the cables that bend a lot between the two parts of the roof and I'll also check the cables flybobbie suggested.

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Z4 E89 Rear hardtop part not operating correctly

Post by RobbiZ4 » Wed Dec 04, 2019 1:59 pm

Source of this issue: broken wires in the roof shell, probably on the right side. Hall sensors and micro switches are ok, they never fail. Fault codes may indicate this, but are wrong as only the wires will break.
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Z4 E89 Rear hardtop part not operating correctly

Post by RobbiZ4 » Wed Dec 04, 2019 2:03 pm

Can't we collect all 3 Z4 candidates with faulty roofs in one location and I will head over from Munich to support you? :D
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Z4 E89 Rear hardtop part not operating correctly

Post by RobbiZ4 » Thu Dec 05, 2019 10:35 pm

Current summary:
- 1 with broken wires in Edinburgh
- 1 with broken wires in Birmingham
- 1 with broken wires in London
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Development of the "Dynamic winker"
Development CAD & 3D print "hinges luggage compartment"
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Z4 E89 Rear hardtop part not operating correctly

Post by RustyZ4 » Fri Dec 06, 2019 12:28 pm

RobbiZ4 wrote:
Thu Dec 05, 2019 10:35 pm
Current summary:
- 1 with broken wires in Edinburgh
- 1 with broken wires in Birmingham
- 1 with broken wires in London
Bugger, looks like it started in the north and making its way down here :D
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Z4 E89 Rear hardtop part not operating correctly

Post by RobbiZ4 » Fri Dec 06, 2019 12:33 pm

RustyZ4 wrote:
Fri Dec 06, 2019 12:28 pm
RobbiZ4 wrote:
Thu Dec 05, 2019 10:35 pm
Current summary:
- 1 with broken wires in Edinburgh
- 1 with broken wires in Birmingham
- 1 with broken wires in London
Bugger, looks like it started in the north and making its way down here :D
Yeah, it's a wave of breaking wires starting in the north of the island and heading down to the south of Europe. May be about 10.000 E89 victims will be hit, sooner or later. :driving:
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Z4 E89 Rear hardtop part not operating correctly

Post by mcbutler » Fri Dec 06, 2019 2:55 pm

Blck_Z wrote:
Mon Dec 02, 2019 11:17 pm
Would the hydraulic fluid smell? I was looking for a leak but couldn't find any obvious ones. I was thinking of checking the cables that bend a lot between the two parts of the roof and I'll also check the cables flybobbie suggested.
if you have a leak it'll empty the whole lot pretty quick and the roof will stop working all together which will be a dead giveaway
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Z4 E89 Rear hardtop part not operating correctly

Post by Busterboo » Sat Dec 07, 2019 1:09 am

RustyZ4 wrote:
Fri Dec 06, 2019 12:28 pm
RobbiZ4 wrote:
Thu Dec 05, 2019 10:35 pm
Current summary:
- 1 with broken wires in Edinburgh
- 1 with broken wires in Birmingham
- 1 with broken wires in London
Bugger, looks like it started in the north and making its way down here :D
:rofl:
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Z4 E89 Rear hardtop part not operating correctly

Post by Phoenixboy » Sat Dec 07, 2019 9:38 am

Busterboo wrote:
Sat Dec 07, 2019 1:09 am
RustyZ4 wrote:
Fri Dec 06, 2019 12:28 pm
RobbiZ4 wrote:
Thu Dec 05, 2019 10:35 pm
Current summary:
- 1 with broken wires in Edinburgh
- 1 with broken wires in Birmingham
- 1 with broken wires in London
Bugger, looks like it started in the north and making its way down here :D
:rofl:
well it can stay up there then, us dont wannit down yeeer.....
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Z4 E89 Rear hardtop part not operating correctly

Post by Smartbear » Sat Dec 07, 2019 2:09 pm

Phoenixboy wrote:
Sat Dec 07, 2019 9:38 am
Busterboo wrote:
Sat Dec 07, 2019 1:09 am
RustyZ4 wrote:
Fri Dec 06, 2019 12:28 pm


Bugger, looks like it started in the north and making its way down here :D
:rofl:
well it can stay up there then, us dont wannit down yeeer.....
I’ve not mastered the West Country accent yet but i know what you mean :)
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e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si, i foolishly sold my trouble free car...

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