Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
Intermittently Trunk Won't Open
-
- Member
- Posts: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
Sometimes the trunk won't open via keyfob or the interior button. Believe it has something to do with the convertible top. No error codes. But raise the top and lower it again and now it works... I don't think it know if the top is fully up or down. Again no error codes or warnings.
-
- Lifer
- Posts: 4034
- Joined: Sat May 25, 2013 8:27 pm
- Location: Stourbridge
Intermittently Trunk Won't Open
Does it open manually?
Does it open with roof down?
Does it open with roof down?
-
- Member
- Posts: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
When the condition presents itself, it doesn't open manually or with the keyfob. It appears it doesn't know the convertible top is closed. If I lower the roof and put it back up the again, the trunk will once again work. Very intermittent problem, There are no codes, no messages on iDrive and the convertible open close buttons are not blinking or red.
- RobbiZ4
- Senior Member
- Posts: 1243
- Joined: Wed May 16, 2018 10:12 am
- Location: Munich
- Contact:
Intermittently Trunk Won't Open
The locking system should be checked against broken wires.
If the trunk opens, check if the trunk light is on. If not, it's wire is broken on the left.
If the trunk opens, check if the trunk light is on. If not, it's wire is broken on the left.
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: 57
- Joined: Mon Jul 19, 2021 7:29 pm
- Location: Loughborough
Intermittently Trunk Won't Open
Is the roof fully closed when you try to open it with a fob? If yes then there is a simple fix:
Look at: https://www.realoem.com/bmw/enUS/showpa ... Id=54_0413
If you can't enable roof open with a fob when it's fully closed there are sensors in the trunk. 4 Hall effect sensor (number 7) and 1 Microswitch (number 4), I suspect that one of Hall effect sensor doesn't detect the internal holder in the trunk for roof in the position.
Look at: https://www.realoem.com/bmw/enUS/showpa ... Id=54_0413
If you can't enable roof open with a fob when it's fully closed there are sensors in the trunk. 4 Hall effect sensor (number 7) and 1 Microswitch (number 4), I suspect that one of Hall effect sensor doesn't detect the internal holder in the trunk for roof in the position.
Electrical engineer with interest in mechanical stuff, hit me up if you need help with some interesting projects.
Z4 - 2012 iDrive S 2.0L
Current project: iDrive Android Screen Installation
Z4 - 2012 iDrive S 2.0L
Current project: iDrive Android Screen Installation
-
- Member
- Posts: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
The top is fully closed and while driving the convertible closed warning periodically illuminates and the warning sounds. While this fault is illuminated, the windows and the trunk no longer work. So one of the sensors for top closed is intermittent. I'm going to hook up ista d later and see if there are any clues.
-
- Member
- Posts: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
To answer a previous question, yes trunk light illuminates.
Problem happened again yesterday. Convertible top was up and locked in position. I parked the car and went to open the boot and no luck. Looked in the car and the convertible top up button was illuminated. I had to press the open convertible top button for several seconds and then press the button to close the convertible top. Then everything was fine and boot opened as it should.
I'm not seeing any frayed wires or visual problems. It happens so infrequently, and it's never in a place or at a time allowing me to troubleshoot with ISTA D. More frequently, I'm driving down the road and will hear a ding and see the top up notification on my iDrive. It comes on briefly and then disappears.
Problem happened again yesterday. Convertible top was up and locked in position. I parked the car and went to open the boot and no luck. Looked in the car and the convertible top up button was illuminated. I had to press the open convertible top button for several seconds and then press the button to close the convertible top. Then everything was fine and boot opened as it should.
I'm not seeing any frayed wires or visual problems. It happens so infrequently, and it's never in a place or at a time allowing me to troubleshoot with ISTA D. More frequently, I'm driving down the road and will hear a ding and see the top up notification on my iDrive. It comes on briefly and then disappears.
- RobbiZ4
- Senior Member
- Posts: 1243
- Joined: Wed May 16, 2018 10:12 am
- Location: Munich
- Contact:
Intermittently Trunk Won't Open
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: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
A couple of questions.
Do you have to remove that big nut to get to the switch? And what nuts need to be marked for reassembly.
Do you have to remove that big nut to get to the switch? And what nuts need to be marked for reassembly.
- RobbiZ4
- Senior Member
- Posts: 1243
- Joined: Wed May 16, 2018 10:12 am
- Location: Munich
- Contact:
Intermittently Trunk Won't Open
No.
These ones:
The comple unit has to be removed in one piece.
Details can be found in the linked howto's.
Better you invest some time into reading these threads as stumbling over a couple of small pitfalls under time pressure.
These ones:
The comple unit has to be removed in one piece.
Details can be found in the linked howto's.
Better you invest some time into reading these threads as stumbling over a couple of small pitfalls under time pressure.
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: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
Thanks. Now I see it.
-
- Member
- Posts: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
I'm going to order the switches and hold them till better weather. Hopefully I can make a video tutorial.
-
- Member
- Posts: 644
- Joined: Sun Aug 05, 2018 12:14 pm
- Location: Hershey, PA USA
Intermittently Trunk Won't Open
Well, out of time. One of the switches failed and I need to replace. Hopefully this week I can replace and do a video tutorial.