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  #31  
Old 02-10-2020, 06:12 PM
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Quote:
Originally Posted by aureliusmax View Post
when you talk of the actuator, you're meaning the solenoid linear actuator that disengages the door lock ?



why do the windows become frozen, what if the window channels have fresh silicon lube ?



and why not if they key cylinder is frozen just spray some brake clean, acetone's freeze point is 95 degrees less than water.


Itís extremely rare for the lock cylinder to freeze but I had mine freeze a month ago. I heated my key with a lighter twice and it defrosted.

Acetone is a good idea because no grease left behind.

Windows freeze because water is relentless. You canít make a window not freeze under the right conditions. The reason is there is a rubber seal that touches the glass and will freeze.

In BMW parlance the actuator means the whole lock/latch mechanism. It uses two motors with worm gears to actuate the lock mechanism.

The lock and latch mechanism is combined but the two sections of the actuator are distinct and can be separated for repair.
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  #32  
Old 02-10-2020, 06:21 PM
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https://xoutpost.com/bmw-sav-forums/...hlight=Awr-fix

That thread has the link to my photo library with the actuator videos.


Sent from my iPhone using Tapatalk Pro
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  #33  
Old 02-10-2020, 07:11 PM
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andrewwynn:

You seem to be the hacker for these lock units. Just out of interest have you even encountered a fault on driver lock unit locking hall sensor? I mean the one that senses if the door is locked or not. This happened to me on quite fresh 3 year old original lock unit. After replacing I took the old unit apart but couldn't see any obvious problem.
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Old 02-11-2020, 02:00 AM
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The sensors are all hermetically sealed and I havenít had any fail in that way and the whole point of using magnetic sensors is there arenít any moving parts to fail so itís more likely a wiring problem I would probably cut mine open and see if a wire broke somewhere
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  #35  
Old 02-11-2020, 07:48 AM
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Originally Posted by andrewwynn View Post
The sensors are all hermetically sealed and I havenít had any fail in that way and the whole point of using magnetic sensors is there arenít any moving parts to fail so itís more likely a wiring problem I would probably cut mine open and see if a wire broke somewhere
That's what I was thinking too. But like said there was nothing obvious when taken apart. Also difficult to test because it could work a few weeks normally and then start doing it again waking alarm when locked or showing door open while driving.
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Old 02-11-2020, 09:52 AM
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It can be a problem with the harness e g. Frayed wire where it goes through the door hinge.

Best way to ferret out if itís a wiring problem:

Take the door panel off and the vapor barrier, then jump in the car and lock the door with the key remote twice (second time disables the motion sensor).

Then reach in the door and start yanking on the wiring and see if you can set off the alarm. Odds are far better itís an in-line wiring problem than internal to the actuator.

Also: do you have something that gave you feedback which door for sure. Dash indicator of door ajar and which?
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  #37  
Old 02-11-2020, 09:59 AM
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Originally Posted by andrewwynn View Post
It can be a problem with the harness e g. Frayed wire where it goes through the door hinge.

Best way to ferret out if itís a wiring problem:

Take the door panel off and the vapor barrier, then jump in the car and lock the door with the key remote twice (second time disables the motion sensor).

Then reach in the door and start yanking on the wiring and see if you can set off the alarm. Odds are far better itís an in-line wiring problem than internal to the actuator.

Also: do you have something that gave you feedback which door for sure. Dash indicator of door ajar and which?
I've already renewed the lock unit several months ago and it cured the problem. Hall sensor is wired to door module and only bus wire between door module and GM. So if the hinge wiring was the problem all other door functions would fail at the same time. My initial question was more academic interest how that hall sensor has failed on a relatively fresh unit and if you had encountered similar cases. Problem was pinpointed to driver's door because on DIS diagnostics alarm was activated by driver's door and one time I caught the problem with INPA live data showing driver's door contact going on/off even when the door was closed.
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  #38  
Old 02-11-2020, 10:03 AM
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Do you still have the old part? I would love to do some most mortem and help find that answer. I have not had to root out that problem.

It does seem like you got a Mfg defect issue and also good feedback for others what you just posted regarding the door module go-between.
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  #39  
Old 02-11-2020, 12:32 PM
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Originally Posted by andrewwynn View Post
Do you still have the old part? I would love to do some most mortem and help find that answer. I have not had to root out that problem.
I already took it apart to see if I could find anything obvious. It's in million pieces now. If you were closer I could hand it to you for examination.
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