[carlosalbertogui]

when my car had this problem

the computer on bmw diagnostic lots off issues inclusive the dme and juntion box
the dealer put the car upside down he checked every relay and every fuse
by the fourth day in the morning after i tell him it should be some cable disconnect or so
he take the battery off and suprise rusted cables one of them cutted all the way
the other almost in the same condition......
during 4 days i went to the dealer several times to see if they were trying to fix the problem every time the electician was arround my car checking all the system with the voltimeter and the diag machine and nothing.
has i said in the 4 day of work he choose to start from the source of power and guess what it was it cable rusted and the ather almost broken too

hope you solve the problem!!!!! best luck

[RAR]

Right here go's...

MM's called to say they have found the problem so i went down there. They had ordered the blue relay but got sent the wrong one

However, when opening up the ECU casing there is a puddle of water at the bottom and when pulling out the DME ECU unit its dripping with water and if I shook it you could hear the water! We checked all of the seals on the bonnet and all 4 of the clamps for the ECU case and every bit was good and strong. So how the hell did water get in there enough to soak the ECU?

So, that's what they've put it down to, a new DME ECU unit (£716.10 - Part only). The engineer that I spoke to, Derek (nice chap), who was working on my car said that he had started the car several times prior to the discovery without problems but said that didnt suggest that the ECU was OK and plus I run the risk of frying the entire loom if I leave it like that. Sounds plausable I suppose...

Good news is that my 3 month warranty is going to cover the cost but they will be sending their own engineer to asses the work before MM's can even begin, for 2 reasons alone;
1. The claim is so soon after the warranty started (I only bought the car 3 weeks ago)
2. Because the cost has exceeded £500.

I still cant help but think its just the relay, MM's are going to fit the ECU and the problem will still be there but I'd rather get the expensive work done under warranty and end up paying for the relay part myself if it does turn out to be that

We'll see....

Thanks again to everyone that chipped in with advice

[jinjur]

If there is damp in that box the relay could be bucked too but as you say, get the dollars spent first and do the relay last, actually.....I would just do it anyway while that box is open tbh for 10 quid

Good news all the same

J

[RAR]

Well, after verbally confirming that the work/repairs for a replacement ECU WOULD be covered my warranty company (AutoTrust) have now done a complete u-turn and have now confirmed that because the ECU housing had not drained the water as it should have, its down to water digression that the fault has occured and is therefore not covered. (basically the plug at the bottom should allow the water to drain but it hasnt and apparently that it why it is not covered).

I have since spoken to trading standards who have made the obvious point about the 'Sale of goods act - amended 1979'. I have also called the garage who sold me the car to keep them in on the loop.

Cut a long story short, I'm waiting to hear back from the Garage that sold me the car (they may offer a goodwill gesture) but as the car is on Finance, technically the Finance company own the car. As advised by TSI I have written a letter to the Finance Company (with one of TSI's own templates) that basically says "its your car, your responsibility and is clearly not fit for purpose/intended use as a car".

Updates to come, thick and fast. The saga continues.


ARRGGGGHHHHHH I just want to drive and enjoy my new car, not have to deal with this!!!

[m1bjr]

Having been into my ECU box a few times I find it totally implausable that the watertight ECU enclosure can fill with water.
The whole thing is then covered with the microfiler tray just to make it more unlikely!

These 'finds' make me highly suspicious.
I would dry it out and refit.
If it has not failed, the issues may be down to water ingress into the connectors.

Interesting you can hear water inside the unit. I thought they were hermetically sealed but maybe I was wrong?

Steve

[kickboxer09]

i have exactley the same fault, there is no water in my battery compartment and the cables are in excelent cond. i am having the new relay installed today will post my putcome later on this evening to let you know if the car starts! i spoke to BMWMAN and he is very helpful, if you have this fault then contact him..

[mfa]

Originally Posted by jinjur

Right.....

I guarantee you that the following will fix this.

I had EXCACTLY the same issue and contacted BMWman (www.bmwman.co.uk) and I urge anyone who has issues with a BMW to contact James.

I do not believe I have ever spoken to a more technically sound chap in my life.

Just for reference, BMW wanted to replace the fuel pump and abs system on ours.......just imagine that cost. All because the computer said so.

2 Specialists wanted to replace the injectors and fuel pump, again a fortune.

When I asked said specialists about relay failure i was advise not on this model.




The fix?


£10.40

• Take yourself off to BMW and ask for part number B61.36.6.915.327. You will receive a blue relay. Yes.....I know!
• Now if you are going to do this yourself, the part resides with the ECU under the scuttle panel
• Disconnect the battery in the boot before you do this
• Remove the pollen filter
• Remove the scuttle
• Finally remove the ecu box lid (cream box, driver side engine bay, under the windscreen)
• Replace the blue relay
• Reassemble
• Reconnect
  

I guarantee you it will be sorted.



FYI, if you look at your dash when you are trying to start the car I am sure you will see that the engine management light is not coming on?

This is the problem, the relay has failed and the ECU isnt coming to life.


Remember, BMWman.co.uk. LEGEND!

Regards
Andy

Hej Everyone, had the same problem and Andy you solved it for me, I want to by you a beer and if you ever come by Dk or Se, just contact me, my BMW is totally changed after I've change the blue relay.
Thanks again man.
M

[kempyp]

Originally Posted by RAR

Hi Everyone....

I'm a newbie on the site. Bought an E90 330i about 4 weeks ago and yesterday the thing broke down on me

I've done some searching on this forum and it appears to be quite a common fault with the valve on the Hydro Pump for the DSC unit.

The only difference is, from what I've read, other people who have had this problem are still able to drive their cars.

Basically, it was driving in the terrential rain yesterday and suddenly the DSC Failure error came up and the engine cut out. After attempting to restart it, which it wouldn't, more failure messages appeared.

After the DSC failure it came up with DBC failure (Dynamic Brake Control ?), Transmission Failure, Fuel Pump failure and Tyre Pressure Sensor failure.

I thought I'd found the problem originally (Hydro Pump repair kit) but the fact that it wont start whereas other people with the DSC failure can still drive makes me wonder if its something electrical or a sensor. After the first failure error, losts of other warnings coming up?!

No idea. I've got the car in with Munich Motors (read mixed reviews about them) mainly coz they are a stone throw from my house. The car is covered under a AutoTrust warranty if anyone has heard of them!? I'm currently waiting for MM to run diags to confirm exactly what the problem is....

I did wonder if maybe a replacement ECU? I'm clutching at straws..I know.

Any idea's anyone? Any help appreciated.

Originally Posted by RAR

Well, after verbally confirming that the work/repairs for a replacement ECU WOULD be covered my warranty company (AutoTrust) have now done a complete u-turn and have now confirmed that because the ECU housing had not drained the water as it should have, its down to water digression that the fault has occured and is therefore not covered. (basically the plug at the bottom should allow the water to drain but it hasnt and apparently that it why it is not covered).

I have since spoken to trading standards who have made the obvious point about the 'Sale of goods act - amended 1979'. I have also called the garage who sold me the car to keep them in on the loop.

Cut a long story short, I'm waiting to hear back from the Garage that sold me the car (they may offer a goodwill gesture) but as the car is on Finance, technically the Finance company own the car. As advised by TSI I have written a letter to the Finance Company (with one of TSI's own templates) that basically says "its your car, your responsibility and is clearly not fit for purpose/intended use as a car".

Updates to come, thick and fast. The saga continues.


ARRGGGGHHHHHH I just want to drive and enjoy my new car, not have to deal with this!!!

Hi

How did this saga end?

I'm having similar problems with my E91 330d 2006 - had the DSC Failure message this morning. My car is in the Garage now for a whole list of problems to be fixed (I only bought it a couple of months ago)

[Sxanth]

Thread revival.

This happened to me today, been raining all morning drive the car, was fine. Got back in it an hour later.

Fired up but sounded like shit, drove it 10 meters cuts out and all the errors mentioned in this thread appear.

At a garage now. This thread has given me some hope, I was thinking something had got wet. So this reaffirms the theory somewhat. Bloody car.

[Sxanth]

Just to give feedback for anyone else who has the similar issue.

Unfortunately in my case the ecu was literally submerged and full of water. So it's fucked basically and needs to be replaced. It was monsoon weather the day the car died, just unlucky I guess.

1300 quid all in - not been a nice day.

[rasa bmw]

Originally Posted by Sxanth

Just to give feedback for anyone else who has the similar issue.

Unfortunately in my case the ecu was literally submerged and full of water. So it's fucked basically and needs to be replaced. It was monsoon weather the day the car died, just unlucky I guess.

1300 quid all in - not been a nice day.

ouch,,i
had a clutch done this week £740

[Sxanth]

Yes was painful - picked up the car this morning all OK again, it was going to get a transmission service this month but it can bloody well wait till Jan after this outrage.

[Tambohamilton]

How does water even get in there though? Any sign of damaged seals etc?

[rasa bmw]

Originally Posted by Tambohamilton

How does water even get in there though? Any sign of damaged seals etc?

usually it will be blovked drains,,then the whole lot fills up,,then fills the ecu,,then the water slowly drains out the car but water still remains in the ecu,,wellt hats what used to happen on the mgzt cdti which was bmw owned and used the bmw 320d engine,,the drains were called plenums,,had to rod them out now and agian

[Sxanth]

Originally Posted by Tambohamilton

How does water even get in there though? Any sign of damaged seals etc?

Yeah bulk head drains were blocked. It was absolutely hammering it down they backed up and just got into the ecu.

I was very unlucky basically although anyone reading this I'd advise to get a watering can and test the bulkhead drains are not blocked!

[bdiiz]

Damn such an old thread and hopefully, it helps me! Revival time!

I'm new here and I've been having this same issue whenever the car gets a lot of water. Car wash or loads of rain.

My issue is DSC failure, DSC failure, Flat tyre monitor failure. Car wont start
Living 2-hour drive from the closest BMW garage We thought of trying to figure out the issue after tinkering with the car for a few days we thought to unplug the ECU and leave it out for a few hours and plug it back it. Starts first time ever time. Once I figured out that water was the cause I started hand washing my car and had no issues up until Christmas eve Australia had its first big Rainstorm in 6 months and the Issue came back on Christmas day. I tried the olde unplug the ECU trick and this time it hasn't worked and not started since.

BMW Australia has told me its probably ECU issues and quotes me upwards of $3000 AUD to fix this.

The black relay was extremely hot after the car was just sitting there not doing anything so could this be the issue I am having? Should I try replacing both the black and blue ones?

[luis12]

Hi everyone, I was searching online for this issue that i am having with my car and came accross this forum. I have a 07 320i and a couple of days ago noticed that my passenger side floor was wet after 2 days of rain here in sydney. I cleaned it up and noticed and the water was coming from the sunroof, I didn't pay much attention and was driving the car perfectly until the next morning when i went to star the car i get the DSC, DBC, TPMS and cruise control failure. The car would crank but not start but no check engine light, i have replaced the blue relay but problem persists. i assume it has something to do by the fact that the box where the ECU was had some water at the bottom but all cables and ECU were dry. I noticed there is another black relay there, anyone knows what that relay is and if I take it out it could solve my issue? Any other advice would be greatly appreciated. Cheers.