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Is this the only way to open the roof now?
- r0x
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- Joined: Wed Sep 06, 2023 12:56 am
- Location: Allentown, PA
Is this the only way to open the roof now?
A68C, roof is closed and latched, and will not budge with either button - just get the blinking red light. I'm confident I can repair the wiring, but I can't get the roof open. ISTA says that it is necessary to damage the interior of the rear shell to open it now. Does anybody have a better idea? TIA!
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Is this the only way to open the roof now?
Follow this guys method. You should be able to pop the trunk with ISTA.
https://www.youtube.com/watch?v=3q52HtkK6mU
https://www.youtube.com/watch?v=3q52HtkK6mU
- r0x
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- Location: Allentown, PA
Is this the only way to open the roof now?
OK. My trunk and windows actually work fine. But in the video, he opens the rear shell by jumping the signal wires for the two microswitches, essentially fooling the CTM into thinking they're both OK. My problem however is the rear shell Hall sensor. Could I perform the same trick by jumping the rear shell Hall sensor signal wire to one of the other Hall sensor signal wires? It seems logical but I don't know if I'm going to fry something.
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- Lifer
- Posts: 4050
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- Location: Stourbridge
Is this the only way to open the roof now?
If it won't open it's possibly seeing an open circuit broken wire to the sensor.
If you had another sensor perhaps it could be wired or plugged into module in the boot to bypass the sensor, but bring back the continuity.
Not a simple matter of just bridging any wires on hall sensor.
Look for this in US.
https://www.lllparts.co.uk/product/bmw- ... 4347190735 Another idea jump wires from hall sensor all the way back to control module to bypass any broken wires.
I know i had broken wire on the hall sensor "roof panel 2 packed".
I threaded in new wires to bypass the old wire, i had no idea where it broke, too hard to remove wires, so paralleled new wires and soldered to hall sensor.
If you had another sensor perhaps it could be wired or plugged into module in the boot to bypass the sensor, but bring back the continuity.
Not a simple matter of just bridging any wires on hall sensor.
Look for this in US.
https://www.lllparts.co.uk/product/bmw- ... 4347190735 Another idea jump wires from hall sensor all the way back to control module to bypass any broken wires.
I know i had broken wire on the hall sensor "roof panel 2 packed".
I threaded in new wires to bypass the old wire, i had no idea where it broke, too hard to remove wires, so paralleled new wires and soldered to hall sensor.
- RobbiZ4
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Is this the only way to open the roof now?
The top hall sensor (HS) can't be bridged to any other signal! It detects the arrival of the rear roof shell on the front.
But putting an external HS onto the correct wires directly on the 26pole plug at the CTM might do the trick. The sensor wires on the plug are organized in parallel: 3-16, 4-17, 5-18 ,...
For hall sensors you have to care about the pin orientation as well: colour is power supply, brown is the signal itself.
Sensors can be simulated as well with resistors: 570 ohms or 2.770 ohms.
But that's not a simple playground!
But putting an external HS onto the correct wires directly on the 26pole plug at the CTM might do the trick. The sensor wires on the plug are organized in parallel: 3-16, 4-17, 5-18 ,...
For hall sensors you have to care about the pin orientation as well: colour is power supply, brown is the signal itself.
Sensors can be simulated as well with resistors: 570 ohms or 2.770 ohms.
But that's not a simple playground!
Last edited by RobbiZ4 on Thu Sep 07, 2023 8:51 am, edited 1 time in total.
Pardon, je suis Allemand
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
- RobbiZ4
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Is this the only way to open the roof now?
This week I've tested bridging a microswitch coupling lock from the left to support a defective one on the right. It didn't work!
The CTM always checks the current(!) on each sensor line. If you connect one CTM sensor port to another by a bridge, the sensor current deviates too much and the CTM will block any operation.
The CTM always checks the current(!) on each sensor line. If you connect one CTM sensor port to another by a bridge, the sensor current deviates too much and the CTM will block any operation.
Last edited by RobbiZ4 on Thu Sep 07, 2023 11:48 am, edited 1 time in total.
Pardon, je suis Allemand
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
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- Lifer
- Posts: 4050
- Joined: Sat May 25, 2013 8:27 pm
- Location: Stourbridge
Is this the only way to open the roof now?
Could use the old trick of pushing dress pins into wires to contact core.
Then run wires back to boot and do similar there.
That way no damage to wires or cutting.
Then run wires back to boot and do similar there.
That way no damage to wires or cutting.
- B21
- Lifer
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Is this the only way to open the roof now?
Disappointing that our token rocket scientist was defeated by the CTM…RobbiZ4 wrote: ↑Thu Sep 07, 2023 8:49 am This week I've tested bridging a microswitch coupling lock from the left to support a defective one on the right. It didn't work!
The CTM always checks the current(!) on each sensor line. If you connect one CTM sensor port to another by a bridge, the sensor current deviates to much and the CTM will block any operation.
Please keep trying for all of us pls..
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
- RobbiZ4
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Is this the only way to open the roof now?
Well, this was to demonstrate some guys, that the DiagnoseDan solution in his famous E89 video doesn't work as a general option.
My Y3 diagostic tool instead is able to suggest the correct signals to the CTM in every case.
viewtopic.php?p=1912298#p1912298
Pardon, je suis Allemand
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
- B21
- Lifer
- Posts: 5466
- Joined: Tue Oct 05, 2021 7:15 pm
- Location: In my Banana Yellow Space Shuttle...somewhere over Southern Caledonia
Is this the only way to open the roof now?
My faith has been restoredRobbiZ4 wrote: ↑Thu Sep 07, 2023 11:53 amWell, this was to demonstrate some guys, that the DiagnoseDan solution in his famous E89 video doesn't work as a general option.
My Y3 diagostic tool instead is able to suggest the correct signals to the CTM in every case.
viewtopic.php?p=1912298#p1912298
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
- r0x
- Newbie
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- Joined: Wed Sep 06, 2023 12:56 am
- Location: Allentown, PA
Is this the only way to open the roof now?
You know, I *do* have a few Hall sensors here in the garage!
Hold my beer Ima try somethin'.
- RobbiZ4
- Senior Member
- Posts: 1243
- Joined: Wed May 16, 2018 10:12 am
- Location: Munich
- Contact:
Is this the only way to open the roof now?
Pardon, je suis Allemand
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
E89 Roof Maintenance
viewtopic.php?t=130932
Y3 Roof Diagnostic System
viewtopic.php?f=23&t=129048
-
- Member
- Posts: 647
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Is this the only way to open the roof now?
I think it would be advisable to have a spare micro switch and hall sensor which can be temporarily wired into the CTM to both troubleshoot and operate the top into a serviceable position. I'm currently putting together such a kit, along with some spare wire, to keep ready for eventual convertible top failure events. Basically I don't ever want to screw around with releasing hydraulic pressure and manually lifting roof sections.
- B21
- Lifer
- Posts: 5466
- Joined: Tue Oct 05, 2021 7:15 pm
- Location: In my Banana Yellow Space Shuttle...somewhere over Southern Caledonia
Is this the only way to open the roof now?
Look forward to the designjavis20 wrote: ↑Thu Sep 07, 2023 1:31 pm I think it would be advisable to have a spare micro switch and hall sensor which can be temporarily wired into the CTM to both troubleshoot and operate the top into a serviceable position. I'm currently putting together such a kit, along with some spare wire, to keep ready for eventual convertible top failure events. Basically I don't ever want to screw around with releasing hydraulic pressure and manually lifting roof sections.
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is
A very modified Atacama Yellow 35is
-
- Lifer
- Posts: 4050
- Joined: Sat May 25, 2013 8:27 pm
- Location: Stourbridge
Is this the only way to open the roof now?
Something i not noticed on my Foxwell reader if i can obd wise operate a switch or sensor in real time to fool the system, bypass the continuity check..
If roof in boot when fails, all a bit tricky.
If roof in boot when fails, all a bit tricky.