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-   -   Door function control module preventing sleep mode, power drain. (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/112790-door-function-control-module-preventing-sleep-mode-power-drain.html)

PascalforWSOP 01-02-2021 12:30 AM

Door function control module preventing sleep mode, power drain.
 
Today I made progress in diagnosed my overnight power drain— Fuse 20 responsible for “door function control module, driver side”.

I was already noticing some problems related to the driver side door with fuse in (and thus some of the following may be the underlying issue).

With fuse IN;
- Can’t lock driver side door with key fob, have to insert key manually.
- Driver window is always “active”, even with car off no matter what the condition is and other driver-side window controls follow expected conditions. I can always roll up or down the driver window no matter what.
- Car doesn’t enter sleep mode
- Passenger side mirror frequently “twitches” like it’s trying to adjust itself with no input.

With fuse OUT:
- Notably, car can enter sleep mode and parasitic drain is no more
- Security system doesn’t arm
- Obviously can’t use any window switches on driver side, and still have to manually lock

Seems to me to be an electronic issue. any guidance on how to proceed?

andrewwynn 01-02-2021 12:59 AM

I have a feeling it's the driver door switch module. Unplug just that module put the fuse back in

PascalforWSOP 01-02-2021 08:45 PM

I removed the master switch component and now
-Car goes to sleep
- Alarm system arms

I’ll try to go to a junkyard at next opening and see if replacing the component does it. or if it’s something further down the line.

Thanks for the guidance so far

andrewwynn 01-03-2021 12:35 AM

You can open up the box there is likely just some corrosion you can clean off.

The problem with scrap parts is it's a design flaw and many of the cars have the same problem.

When window open an rain gets in. It is literally funneled to the door switxh PCB.

I've rebuilt a few of them when the window fails to go down or up.

andrewwynn 01-03-2021 12:36 AM

The DLA is the only thing I think is down stream but you could unplug just it and do the same test.

PascalforWSOP 01-03-2021 10:28 PM

andrew,

you were exactly right. I opened up that switch board and it had already been TAMPERED with. must have been from previous owner, with new problems showing up now...

Ended up going w the scrap parts and all electronics are working as expected, the door even locks with the key fob now (was planning an actuator swap...)!

Thank you for the guidance the last couple days

andrewwynn 01-04-2021 01:53 AM

Any time I take a door apart I cut the bottom corner of the switch module off. Every one I've worked on had corrosion inside

X5chemist 07-11-2021 11:54 AM

Good information. Mine has a "Deactivation criterion for window operation: error". So it won't sleep. The battery was changed out on Feb 6. No sleep mode was first noticed then. Mid Feb we had we had the huge snow storm! All that snow melted! Plus it has rained like crazy since then too. A new door module switch is cheap. I think I'll order a new one. I'll follow up my no sleep post and link to this one.

andrewwynn 07-11-2021 11:56 AM

Cut the bottom corner off before installing. It's a design flaws that water will pool on the circuit board from the smallest amount to that comes in the window (think: going through drive thru)

X5chemist 07-11-2021 12:05 PM

Cool. Now, how to find out if mine has auto dim mirrors. :mad:

andrewwynn 07-11-2021 12:07 PM

Quote:

Originally Posted by X5chemist (Post 1206556)
Cool. Now, how to find out if mine has auto dim mirrors. :mad:


Does the clown nose twist and change from night to day mode?


Sent from my iPhone using Tapatalk Pro

PascalforWSOP 07-11-2021 02:00 PM

Try to pull that fuse — will it go to sleep with it out?

X5chemist 07-11-2021 02:29 PM

Number 20 right? I'll pull it when I get home. I can force it to sleep with my Foxwell.

Update: Both fuse 20 and 24 were both pulled. The command for sleep was activated. After 2 seconds it woke up. The door window modules (switches) can be eliminated off the sleep list. Also eliminated are fuse 74, FSR, electronic key switch, and radio fuse. The wifey yelled at me when she had to boost it today. :p: I'll take another look on Thur. I'm waiting on a new door latch mechanism. The driver side door broke on Friday. :confused:

PascalforWSOP 07-11-2021 08:21 PM

Better yet, you can also just disconnect the driver door control module pretty easily to really pinpoint it If that’s the issue. I MIGHT have have bought an extra one from my trip to the junkyard if you can’t find one for a good price. I got them for like $10 each. Or as andrew said cut off part of that board.

X5chemist 07-11-2021 08:33 PM

Thanks PascalforWSOP,
On Thur, I'll disconnect the switches and try again. With the Foxwell, I'll go through eliminated components again.

andrewwynn 07-11-2021 08:36 PM

When driver door switch assembly is disconnected a handful of things won't work. I have a feeling the same error will persist. It's simple to try though. Basically the car can't know if the door is shut it may interfere with sleep

X5chemist 07-12-2021 07:15 AM

Today, the whole switch is unplugged right now. I arrived at work early. A pry tool was in the back seat so I unplugged the entire switch. I'll go back out later and see if it's asleep. If not, I'll unplug the passenger side switch.

wpoll 07-12-2021 04:51 PM

Quote:

Originally Posted by andrewwynn (Post 1206557)
Does the clown nose twist and change from night to day mode?

The owners manual kinda infers that turning this "knob" simply tilts the mirror, rather than activating any dim feature.

I haven't checked this though, since mine has auto-dim - never need to touch the mirror or the knob. :dunno:

andrewwynn 07-13-2021 01:33 AM

It dims the mirror by tilting to the glass vs. silver. The key is: with auto dim there is no day/night mode so the clown nose does not twist.

I'm not aware of a way to manually override the auto dim.

X5chemist 07-13-2021 07:20 AM

Okay, do I understand correctly. I need to grab the clown nose and twist. If it moves, it's auto dimming?

RocketyMan 07-13-2021 10:49 AM

Quote:

Originally Posted by andrewwynn (Post 1206655)
It dims the mirror by tilting to the glass vs. silver. The key is: with auto dim there is no day/night mode so the clown nose does not twist.

I'm not aware of a way to manually override the auto dim.

You can test your auto-dim of your center rear view mirror by driving out in a bright day and putting your hand in front of the optical sensor of the front of the mirror. This should be on the right, front, side of the mirror while sitting in the driver's seat, facing forward.

You can also check it in the night time to activate the dimming feature by shining a light at the mirror portion, or the back side of the mirror.

Do note, that window tint will have an effect on this feature.

andrewwynn 07-13-2021 01:54 PM

Quote:

Originally Posted by X5chemist (Post 1206661)
Okay, do I understand correctly. I need to grab the clown nose and twist. If it moves, it's auto dimming?


The opposite. No need for twist on auto dimming model. Manual dim is controlled by twisting the nose.

Something I had to Google when I first got my X5 since no flip lever.


Sent from my iPhone using Tapatalk Pro

X5chemist 07-13-2021 09:13 PM

My X5 has auto dim. The red nose doesn't spin. After more troubleshooting, I'll know to get auto dim switches.


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