lift gate driving me crazy - Bimmerfest - BMW Forums



Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X6 E71 / E72 (2008 - 2014)

X6 E71 / E72 (2008 - 2014)
The BMW X6 luxury crossover went on sale in April 2008 as a 2009 model year. BMW referes to the X6 as a Sports Activity Coupe (SAC) as it combines the attributes of an SUV (high ground clearance, xDrive and all-weather ability) with the stance, styling and roof line shape of a coupe. The E71 X6 was built off the E70 X5 (2007 - 2013) platform at BMW's Spartanburg, SC plant. Total worldwide sales were just over 235,000, sold mostly to the BRIC countries. US total sales was 34,082 vehicles.

Reply
 
Thread Tools Display Modes
  #1  
Old 06-15-2019, 08:38 PM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
lift gate driving me crazy

Or is it called a trunK? rear hatch? I'm calling it a trunk for this thread.

The symptom is simple, I get random "trunk open" warnings. It seems more frequent when I am on bumpy roads. I hear the soft close eccentric running and trying to pull the trunk down until it gives up.

1) Is there a switch to tell when the trunk is closed? I've looked all over and the only thing I have found is a switch on the upper hook module (the module attached to the lift gate latch) that I can hear close when you push the actuator over and back. Yes, I've had it all apart. Down inside the latch it looks like there is a spring out of place and I was thinking that was causing the actuator arm to jump around.

2) I suspect there are sensors in the lift arms since you can set the upper limits and I don't know of any other way to determine the height. Is there a sensor in the lift arms for trunk closure?

3) I thought for a while that there was a broken wire in the boots at the hinge point of the trunk but after cutting them open, I can't see anything. Also, wiggling the wires don't seem to cause any cycles.

4) I can make it run the soft close cycle if I bang on the upper module. So that means that switch is a little flakey so I ordered that entire assembly for $100. BMW at one point said that was the problem but they wanted $450 for the module and 250 to put it in.

5) The soft close motor is running fine. I had taken it out and setup an ADC hooked to a microprocessor to run it and measure the resistance to see if that switch was flakey and I didn't have any failures. So if any modules are bad, it is the upper one (on the lift gate) not the soft close.

6) I closed the lift gate and then unplugged all the modules. I was thinking that this should keep it from cycling. But as soon as I run over a bump at the end of my driveway, I get the trunk open light which would mean it's not the modules, but the wiring. But I'm not sure if maybe the trunk open notification isn't sent until you go a certain distance. Because it seems like no matter how slow I go over that bump, that's when I get the light.

Anyway, lots of notes above, if anyone knows how this thing is seqyuenced and where the trunk closure switches are, if any, please chime in. I suspect there are hall-effect sensors in the lift arms and maybe they are bad causing all the problems, It's either that or that wiring, or one of the modules, most likely the one on the latch. I've put lots of hours in this mess and need to fix it already.

By the way, the car is still smoking like crazy (thanks BMW N63) and I plan to run it into the ground.

Thanks

Jerry
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 06-15-2019, 09:28 PM
Ridin'Dirty's Avatar
Ridin'Dirty Ridin'Dirty is offline
'17 X1 - Rooster Cruisin'
Location: NW PA
 
Join Date: Apr 2017
Posts: 1,007
Mein Auto: '93 "Beemer" R100r
Could this explanation and wiring diagram help you troubleshoot this problem?:
https://www.newtis.info/tisv2/a/en/e...ration/XTgUlge
I'd be giving the rear lid contact switch (microswitch) a real hard look.
Attached Thumbnails
Click image for larger version

Name:	Microswitch.jpg
Views:	24
Size:	51.1 KB
ID:	854929  
__________________

If you can't fix it, you don't own it.

Last edited by Ridin'Dirty; 06-15-2019 at 09:36 PM.
Reply With Quote
  #3  
Old 06-16-2019, 11:51 AM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
thank you, thank you, thank you!!! Just what I needed and suspected. Hall effect sensors in the lift arms. One must be bad or a broken wire. I've been all over the wires and can't find anything.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 06-19-2019, 10:16 AM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
By the way, I saw someplace the color-coded wiring diagram. I looked around on the site you sent without luck. Do you know where they are located? I saw them a while ago, can't remember where.

Thanks again. Very helpful link.

Jerry
Reply With Quote
  #5  
Old 06-19-2019, 11:49 AM
Ridin'Dirty's Avatar
Ridin'Dirty Ridin'Dirty is offline
'17 X1 - Rooster Cruisin'
Location: NW PA
 
Join Date: Apr 2017
Posts: 1,007
Mein Auto: '93 "Beemer" R100r
Is this what you were looking for?:
https://www.newtis.info/tisv2/a/en/e...ration/jY7XrSs
__________________

If you can't fix it, you don't own it.
Reply With Quote
  #6  
Old 06-19-2019, 12:32 PM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
RD - yes, that gets me to the motors but I don't see the upper latch and the closed/open switch in that diagram. It's no big deal I guess, there are only 4 wires and I can see the control unit.

I also have the upper mechanism with the module coming today. So I'm going to throw that in and hopefully that fixes it. Otherwise I will dig around in the drawings you just sent. There must be another one outlining that switch and control unit.

thanks again!

Jerry
Reply With Quote
  #7  
Old 06-19-2019, 11:02 PM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
Ok, the upper latch electrical module that contains the closure switch is what was intermittently failing, most likely the open section of the double throw micro switch. I swapped it out with one from Ebay and it works perfectly. You have no idea how long this has plagued me. My wife complaned for years but I was able to tune it out. Must be from all the practice I had tuning her out...

The dealer wanted $425 for the mechanism with module plus $520 to install it with no guarantees on trim panels. It's almost impossible to remove those panels without breaking the tabs. I spent about 30 hours on it over the years, maybe more, then bought the part for $100 on ebay. I have no excuse for all the screwig around and testing other than the the module switch always tested ok with the ohm meter. But once the car was moving it failed.

Anyway, it is very pleasurable to drive it without my wife complaining every time it dinged.

Thanks for the diagrams.

Jerry
Reply With Quote
  #8  
Old 06-22-2019, 03:37 AM
peter2772000 peter2772000 is offline
Finally a believer
Location: Montreal/Cape Coral
 
Join Date: Dec 2015
Posts: 106
Mein Auto: 2012 X6 3.5i Sport
Glad you got this figured out!

BTW, if you can send me detailed instructions on how to tune my own wife out, I'd be mighty thankful LOL
__________________
Never fart in a wet suit


2007 FJ Cruiser
2012 X6 35i Sport
2013 ML350 BT
Reply With Quote
  #9  
Old 06-22-2019, 03:39 AM
Doug Huffman's Avatar
Doug Huffman Doug Huffman is online now
Nuclear engineer
Location: Washington Island, Wisconsin, thru Death's Door
 
Join Date: Apr 2015
Posts: 12,703
Mein Auto: CPO2012 X5 35d M57(E70)
Turn hearing aids OFF, on mine, Mode 3 for T-coils.
__________________
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.
Reply With Quote
  #10  
Old 06-22-2019, 06:07 AM
Ridin'Dirty's Avatar
Ridin'Dirty Ridin'Dirty is offline
'17 X1 - Rooster Cruisin'
Location: NW PA
 
Join Date: Apr 2017
Posts: 1,007
Mein Auto: '93 "Beemer" R100r
Quote:
Originally Posted by peter2772000 View Post
send me detailed instructions on how to tune my own wife out, I'd be mighty thankful LOL
This might work:
https://ifunny.co/picture/man-faked-...s-to-AQ0n8m5X6
__________________

If you can't fix it, you don't own it.
Reply With Quote
  #11  
Old 06-24-2019, 07:55 AM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
It takes years of practice and at least two wives.

Lift gate is still working fine. i can't believe how long I lived with it dinging every so often. After I brought it back on the road (sat for 3yrs waiting for the N63 oil resolution) I closed it and it didn't ding for about 6wks. I then opened it and it's been driving me nuts since.

By the way, all those parts are on ebay cheap. Also, I found some of the hand holds that rot (sort of melting plastic) on Amazon for cheap. The passenger side door pull was like $23. I just have to figure out how to pull the panel off.

thanks again for the link, very helpful.

Jerry
Reply With Quote
  #12  
Old 06-24-2019, 08:05 AM
Ridin'Dirty's Avatar
Ridin'Dirty Ridin'Dirty is offline
'17 X1 - Rooster Cruisin'
Location: NW PA
 
Join Date: Apr 2017
Posts: 1,007
Mein Auto: '93 "Beemer" R100r
Quote:
Originally Posted by Cncjerry View Post
The passenger side door pull was like $23. I just have to figure out how to pull the panel off

Jerry
"Ask and ye shall receive":
https://www.newtis.info/tisv2/a/en/e...sts/1VnYqhTtDI
__________________

If you can't fix it, you don't own it.
Reply With Quote
  #13  
Old 06-24-2019, 08:39 AM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
the part I want to remove is #1 in section 2. It looks like they have a different lever for everything. I wonder if that cover pops off and then I have access to the bolts. I grab my trusty nail puller (lever, universal part number 001) and pop the cover off and see what I see.

Thanks. I keep wondering where you get all these? It looks like they are all from the same manual?
Reply With Quote
  #14  
Old 06-24-2019, 09:20 AM
Ridin'Dirty's Avatar
Ridin'Dirty Ridin'Dirty is offline
'17 X1 - Rooster Cruisin'
Location: NW PA
 
Join Date: Apr 2017
Posts: 1,007
Mein Auto: '93 "Beemer" R100r
Quote:
Originally Posted by Cncjerry View Post
Thanks. I keep wondering where you get all these? It looks like they are all from the same manual?
You too can enjoy this wealth of knowledge anytime with this online Service Manual. Works even better when you enter the last seven characters of your cars VIN...enjoy!:

https://www.newtis.info/tisv2/a/en/

And for part numbers, try this: :

https://www.realoem.com/bmw/enUS/select
__________________

If you can't fix it, you don't own it.

Last edited by Ridin'Dirty; 06-24-2019 at 04:36 PM.
Reply With Quote
  #15  
Old 07-07-2019, 05:56 PM
Cncjerry Cncjerry is offline
Registered User
Location: Sausalito
 
Join Date: Jan 2011
Posts: 47
Mein Auto: 335i and X6
ha! so I've been writing about my N63 engine woes and last week my engine started making a ton a noise. I guess I blew a turbo. I think this might be the final straw on this car. Off to 1800kars4kids. I can't believe it. I fixed the damn trunk and then junk the car!!!

Thanks for all the input.

Jerry
Reply With Quote
  #16  
Old 07-07-2019, 07:16 PM
Ridin'Dirty's Avatar
Ridin'Dirty Ridin'Dirty is offline
'17 X1 - Rooster Cruisin'
Location: NW PA
 
Join Date: Apr 2017
Posts: 1,007
Mein Auto: '93 "Beemer" R100r
Oh man, sorry to hear that! But now at least you can give your full attention to its stablemate.
I've made it very clear to my X1 that one too many glitches or frequent late night strandings and I will escort it directly to the crusher... and watch approvingly as the deed is done. #zerofoxs
__________________

If you can't fix it, you don't own it.
Reply With Quote
Reply

See More Related BMW Stories


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > X Series > X6 E71 / E72 (2008 - 2014)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 11:36 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
© 2001- VerticalScope Inc. All rights reserved.