x5 Multiple Issues on E70/FE83 (VIN Included for clarity)

[NxhFam]

Hey guys. I'm unsure of the formatting for posts so please correct me as I learn. I am looking for any feedback to help me in diagnostic. I do have paperwork from the last mechanic that worked on it, but the issue is that they did not use a BMW diagnostic tool, they used a generic tool which of course resulted in error codes/descriptions that are less than helpful. Once posted, I will update the topic from my phone since the pictures are on there. I don't believe they would be much help due to the source but anything I can provide on my end that would help reach a more educated diagnosis, don't hesitate to request.

I have a 2009 bmw X5 (VIN - 5UXFE83529L308475) https://bimmer.work/vin/l07b52ec71e6aeec1179c8ed5c73494a9/options/

A while back I diagnosed damage to the Tailgate Control Module Unit which was related to the Roof Drain Hose. I unclogged it temporarily until I could take the liner off and replace it properly, however since that was discovered I've had a slew of other issues come up which I believe are related but I do not know for sure.

Current issues:

• The Tailgate won't open automatically on a key press, it does unlock but needs to be opened manually. (Not priority, I don't mind opening it manually for now)
• The battery stopped charging. (Battery tested and is in good condition)
• Radio not working in any capacity (likely related to the next issue, but unsure)
• The hardware on the driver side of the vehicle is likely water damaged, which includes the amp, Teleservice module(Unsure if correct), Cd Changer module (actual Cd Changer in the glovebox), Driving Assistance?(Unsure of module location), Satellite Radio. There's I believe a total of 4 or 5 silver metal 'boxes' or modules on the trunk's driver side well.
• The SOS light is on (Likely related to previous issue)
• The 4x4 light came on (possible that the fluid needs topped off but unsure if it's related to something in the trunk)
• The traction control system is not working, and the button does not allow me to turn it off (always on) I do not want to turn it off, but I would like to diagnose all of the issues so worth listing.
• The front windshield sprayer is not working, but the rear one is (The front pump was replaced recently but it's not making any sound when using the stalk) (Rear sprayer works by pulling the stalk which seems to be reversed to OEM functionality).

 

Sorry for the long post but this little one was saved from a salvaged yard, and when purchased, it was purchased knowing I would be buying a problem child, but I am still learning about this platform (previously e46, and e39 owner).

 

[Greydog]

Hi Jose

Welcome to the Forum

First you really need a diagnostic scan to help here us and you there are several BMW capable systems these day at reasonable cost BMW ISTA/INPA  available online Foxwell, Autologic, iCarsoft the list is getting longer

my own X5 E70 had several K-can bus issues which after a lot of head scratching lead me to a BMW cable jointing system common on our cars. The joints are not soldered they are twisted and compressed then covered in a clear plastic sleeve. As you have suffered water ingress I would start in the Boot/Trunk under the floor starting at the rear right below the rear fuse board you will find the main Loom it runs along the rear of the car towards the battery hidden in it are several of these joints (pictures attached) The dark stain inside the clear plastic is corrosion with my car several of these joints just fell apart. I ended up remaking and soldering all the joints in the pictures the sealing them with shrink wrap.

Once done I could clear all manner of faults that just wouldn't clear before. However as you are also having other issues they may possibly be either junction box and/or footwell module related. Also check the alternator output it may be the voltage regulator is fritzed

Hope this helps

Dave