So guys back again ive got a fault code on my bmw x5 e70 saying 4x4 abs ebv failure previous owner just went and changed the abs pump but never coded it so I sent the original off to ecu testing to see if it was faulty it came back today and they said the original pump had no faults at all but whilst I was waiting for it to come back the car has been doing stupid things like wipers staying on when car turned off passenger window not working to the point the motor burns out on it radio staying on when cars off im literally getting to the point i give up only owned it a month any help I would appreciate it

Morning Steven

First I take it you are working from lights on the dash you really do need a Diagnostic session to be sure of the Fault cause.

From your description the fault could be the Junction Box/FRM (footwell control module) it controls many functions.

You will need to change it if you can get the same part number it will be straight forward but you will need to match the mileage so note it before starting or you will get a tamper dot on the dash

Dave

 

Hi Dave thank u for your reply il look into this thank u

Also is it best to go to bmw for a diagnosis session or can any mechanic help

Hi Steven

To get the best you will need someone with a BMW capable diagnostic system Obviously BMW but they will be costly as most Dealers now have hourly rates north of £200. A BMW specialist would have the kit and are normally around half the cost of a main Dealer Google the Register of BMW Specialists. Or a good Independent with a top end Snapon, Foxwell or Autologic system there are several others these days

Your BMW X5 has around 100 control modules a BMW system will see them all and narrow down the source of the fault a General OBD reader will just see a general code that then takes time to trace

Dave

Thanks Dave these are the codes that are coming g up

Morning Steven

Plenty to go at there 🤣 

I see that most of the fault codes are K-can based, if your not aware the Bus system is how all the Control modules talk to each other, so first port of call is sort the K-can bus fault. That should allow you to clear most of the faults then we can see what is left 

How handy are you ? Getting handier I guess 😅

So it may be simpler than you think and not as scary, in the boot right hand side you will need to take out the battery cover and storage box (5 screws). Take out the cover for the rear Fuse Board (unclips) and remove the small storage tray under it (2 push clips) Now you will have access to the main loom across the back of the car. BMW in their wisdom decided to make solder free cable joints by twisting and compressing joints then putting a clear rubber/plastic seal over them. Moisture gets in and the joints corrode and fail that is the cause of your problem, now the fix.

Tools you will need are, Soldering Iron and solder (my preference) or a method of jointing the cables plus some shrink wrap/tape to seal the joints

You need to dig into the main loom the runs below the fuse board where it begins to rise and across the back of the car 

The Pictures show what your looking for any black in the clear plastic is corrosion, when I found mine and moved the joints for the K-can bus they literally fell apart. Look at the picture (Cable splices) you can see the 2 smaller splices on the left (Orange/Green trace and Green) that's the Can Bus. I took off the clear plastic (it fell off) stripped the cables back twisted the cables together and soldered the joint. Work one joint at a time so nothing gets mixed up, once the Can Bus is fixed you should be able to clear most faults. When I found this lot on my E70 I remade all the joints one at a time just for my own peace of mind all of them are in the big loom below the fuse board and across the rear of the car towards the battery.

Not a scary as it seems, when done and tested tidy up the loom with some tape and put everything back together 

Now rescan clear faults and see what is left 

Good Luck

Dave

Dave 

Thank u so much for your time Dave I managed to get someone to plug in with bmw diagnostic and they said they narrowed it down to the transfer control case module il check these cables thou aswel

Morning Steven

Really ? your screen shot doesn't show any VTG Fault or is it a new one ? Or is it a different scan ?

You will need to either get them checked and repaired other wise the K-can bus faults will never be cleared and they will prevent some others being cleared. My course of action would be first repair the K-can Bus and clear down all the K-can Bus faults either using a Scan tool like your original screen shots or simply disconnect the Battery for 30mins (a Dealer Trick) Once that is done re-scan and see what faults show. Many folks have carried out costly replacement/repairs due to treating a symptom not the actual cause. Transfer Case damage/faults are normally tyre related  or the VTG oil needs replacing

Seems you are making progress though 😁 

Dave

Hi bud its just somethink that the garage has told me so I haven't a clue what there doing would of been gd if u was local seems like u know what ur doing so hard to trust garages these days

Where are you based? 

Who ever you got the scan pictures from seems OK they clearly have Auto Logic software that can work with your car just depends on whether you feel comfortable with them I guess. Like i say first job is fix the K-can Bus show the post and pictures it will help the Garage or Mechanic get the job done without to much time wasting (£££) then you will be able to see what needs doing

I am not a Garage just an old retired bloke who has fixed lots of cars over a lot of years But if I can help I will

Dave

Hi Dave im located in warwickshire and the garage has told me they had a specialist who came in and logged in with bmw software so they ordered a new transfer case module im not clued up on cars but I try hunt the Internet and research just so I don't get scammed 

Morning Steven

That sounds fishy to me why would they order a Module without talking to you and showing the evidence? and when it doesn't clear the faults who pays for the part and the work?? Based on your pictures (where were they taken) as I say those don't show a Transfer case fault anywhere the code D36A is a communication fault with the DSC? What they do show a whole load of K-can faults (communication system) that is the place to start, get that fixed and the faults cleared. A couple of hours labour max. Then re=scan and you will see where the real issues are, then you can schedule any work, replacement parts etc.

 

Google the Register of BMW Specialists and put in your post code it will show you the nearest ones talk to them before just handing over your car and hard earned find out what their costs are never just hand over your car and wallet

Dave

 

Hi Dave just a update on the car they changed the transfer case control module cleared most faults but they also had to change the dsc module under the seat which cleared all faults apparently but now one of the rear air bags on the suspension either won't inflate or leaks so they have to fix that now these bmws seem like they have problems all the time just want to thank u for all your help

Glad your almost up and running The x5's don't like not being used they sulk 🤣 Remember she's 16 so a temperamental teenager 🤣

Dave