4x4 abs ebv dsc failure

[stehay123]

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

[Greydog]

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

 

[stehay123]

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

[stehay123]

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

[Greydog]

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

[stehay123]

Thanks Dave these are the codes that are coming g up

[Greydog]

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 

[stehay123]

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

[Greydog]

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