This has been beneficial in helping me diagnose what might have been damaged by water infiltration into my battery compartment.

http://www.xoutpost.com/bmw-sav-foru...iltration.html.

I think you confirmed that the component that was under water was the Air Suspension Control Module (EHC). As my "SelfLeveling Susp. Inactive" message has yet to go out after 3 days of driving, I am pretty sure something is damaged.

Can the GT1 or proper code reader from a dealer or indie pinpoint what component might be bad, or is this a trial and error thing? Also, if I was to replace this module (EHC) am I understanding correctly it is not "Plug and play" and I will need to take it to a pro to get it reset?

I have a '01 4.4i with only rear air susp. and both seem to be functioning and inflated, despite the warning message.

nitrogass2000, looking forward to your feedback...

Well when i replaced the module i had to have it coded at the dealer it would not activate by it self. So you will have to do the same its, something that needs coding. But i found out the dealer is a piece of sh it, They do what i can do at home, tell you to replace the most commonly defective parts, and keep replacing crap till its fixed! Thats BS.

UPDATE:

After i replaced the module nothing happened the shit was still down, Actually they pulled the car out of the shop it was working, and as i drove two miles down the road it deactivated again! So i figured i will replace the front shocks, cause thats what the dealer said i need to do but i did not believe them. I replaced the one that was most worn, ran the car in park for 30 minutes then drove it for 10 minutes it would not activate, then while i was driving i decided i will move my steering wheel hard from left to right to make the car rock and swing, and this MADE THE SUSPESION activate! aparently cause it wade it work and try to level the car. But after a while it deactivated again. Actualy when it activated it was still very very stiff so it was not working correctly any way. So i replaced the second one, and it is still NOT activating. :( very very pissed off and disapointed at this time.

The replacement of the shocks was a piece of cake, just unscrewed the hose a little to let the air out and thats it!

I am suspecting that one of my level sensors is bad. By the way i could NOT unplug the son of a B for nothing, the rear sensor plugs are so stuck its not funny!

So what you people think?

Anyone has some input?

You should be PM'ing guys like Weasel or killcrap who work at the actual dealership everyday. If they can't help, jump over the www.bimmerforums.com and see if you can get some assistance from the 5 and 7 guys...there are a handful of dealership guys (killcrap is over there also) who might be able to help.

Sounds like this is a fairly new issue to tackle, so you might be on your own w/ this one for a while.

Air Leveling Module
 

The air leveling module is located beneathe the spare. Once you take the spare out, there's a plastic plate which forms around the battery and consists of three screws. Remove the plastic. The module has one big connector and the module itself is about 4 inches high, 1 inch thick, and 2.5 inches wide. I believe it actually says "Siemens ABS".

Siemens ABS Module
 

I changed out my battery the other day - the instructions from a poster on here were very helpful. While doing this, as I have the Self Leveling Issue and my ride is all the way down, I removed the three screws to look see what else was in there. There is was! This Siemens ABS module. Can I simply replace this component? Will I have to have it reprogrammed? It looks like the box can be opened as there are tabs on either side. What is inside of this box?

Needless to say, I have spent alot of money thus far in diagnosis fees and still haven't got to the root of the issue. It's very annoying. As I search these boards looking for an answer, I am puzzle that there is not a single solution to this issue.

So I ask - What has been done to fix the SLS inactivity? Are there numerous solutions? What has been the Core Issue with this system in your experience?

Thanks in advance!

I am battling the Self-level issue right now myself after having water in the battery well. I had it into an indie shop that specialized in BMW's and they said that they disassembled the ABS module box and cleaned it out (said it clearly had some water in it and start of some mold). They said they carefully wiped down the electrical component connections and ran the case and any non-electrical piece under water to clean it off.

It's about 50-50 now starting the vehicle whether I will get the SLS inactive light. I think I will eventually replace my module also. From what I understand about this module is that it senses a voltage that is necessary to regulate the pressure in the SLS system. When the voltage is out of range, the SLS Inactive message appears. When I asked about getting a new one reprogrammed, I was told that it may need some adjustment since it needs to know your particular vehicles ride setting so it knows what the appropriate range is.

My guess is, if the new module come completely unprogrammed, then you probably need the service to get it set up.

Someone tell me if I know what I'm talking about or just crackin' smoke.

SLS Inactive & ABS Box
 

I am going to pull the X into my showroom today and disassemble the back end again and get at that box. Heck, what difference does it make right now? I found a new box online for $140 US. Will be purchasing that today as well. I am going to open the box and see what is inside. Will take pictures and document this online in an hour or so. There has to be a solution to this issue.

This is the last go around for me. It's going to the stealer next. WTF?

Pictures
 

Here are the pics. There is no visible sign of water intrusion into my battery compartment. I pulled the Siemens Box and there is no sign of mold or water intrusion there either. My problem must be more complicated. I tested all of the circuits for this system and everything has power. It has to be computer oriented.

As I mentioned in other posts, I have had the car in and hooked up to the computer. They originally thought it was a Ride Height switch and replaced the one on the right side of the car. Still no difference. They were able to raise the car using the computer to normal ride height - it has collapsed since. This was over 2 weeks ago. I guess with the system not functioning correctly it's bound to drop back again. They checked the bags and those seem to be functioning perfectly. No leaks.....

I am stumped.