water ingress

[JohnyBoi]

Got the dreaded water ingress... rear passenger footwell 2" deep in water after heavy rain over the weekend.

Central locking alarm and elec windows started playing up... tried drying it out as much as I could.

I had to use the car and when i was driving there was a loud bang from under the passenger seat.. now i have no alarm, windows cent locking etc...

I understand its the convenience control module, been quoted 8hours labour plus price of the new unit ! No chance having just spent 2 grand on new brakes etc...

Can any1 give me the correct part number for this control unit ? Havent had a chance to remove it yet and audi dealer wasn't very helpful.

Ive got Vag Com but its not talking to the controller.

any help would be appreciated

[ahoooga]

is it an Avant or loon ? water in the front footwell as well, or just the rear ?
Its usually the front pass floor getting soaked that causes the problem though .

before replacing the unit, you need to check the seal under the pollen filter by the pass side bulkhead under bonnet. this ones a common fault on VW group cars across the range. The seal dries out allowing water to go into the pass compartment rather than down the soakaways/drains


if it IS the convenience (comfort) control module that's gone bang, you will also need to dry out all connections thoroughly before replacing the CCM.Also trace wiring from the CCM that sits on the floor of the car , as joins in the cables rust up as well.
had same problem in a passat . Even if you replace the CCM , by not drying all connections out before replacing it the joints/connections just start furring and rusting up then your bak to square 1 , with the alarm going off when it feels like it, central locking works on its own whilst your driving and all sorts of weird things.

3rd party specialist like MRC or Unit20 are your best bet for a replacement, they can source cheaper than Audi dealers.

[markmad]

this is the very same problem ive got, finally started stripping it down today hopefully i'll be able to help out with advice soon, i think one of the drainage holes is blocked on mine but i'll need to move something (a bottle can't remember which one) to get to it! by the way mines not really an ingress i'd say more ''PISSING IN''

[JohnyBoi]

Its an avant, water in the back although it was on a slight hill!! I lifted a part of the carpet in the front just there and its still quite wet. Need to get right in about it tomorrow.

I seen a clip on you tube.. on a normal a6 the drain is under the battery in the front of car against the bulkhead. Its the cooling water header tank in the RS that needs to be moved from what I can see.... there didn't seem to be much if any water there tho!! I will check the pollen filter also tomorrow.

Hopefully getting the carpet up shouldn't be to much hassle :-/

Also when fitting new module the key fobs need to be re coded and so does the part via Vag Com?

As for price.. Audi quoted me £294 inc vat. I seen a couple on ebay ranging from £79 - £190 but im not sure which part number would suit the RS.

Its all fun n games aint it :0

[bilko1]

Have you got a Milltek exhaust Johnyboi? if you have once you have got the front carpet up check the air-con drain. There's a rubber flap that sticks due to the heat from the exhaust and this lets lots of water in. It's behind a heat shield so you can't see it underneath the car. Check out this thread for pictures http://forum.rs246.com/viewtopic.php?f= ... ak#p578771

[JohnyBoi]

I do indeed have milltek exhaust,, that's a very useful link bilko cheers...... Im gona get stuck in tomorrow and get this carpet lifted as much as i can... Can this be a tedious task in itself ??

[ahoooga]

First, be sure its the pollen filter housing that's causing the problem !
Does your rear washer jet work OK ? , there's joins in the pipe that could also be the cause of your problem .
One of the joins is down by the passenger footwell/A pillar.

For the pollen filter you dont need to remove the coolant header bottle.
Just lift the bonnet , peel back the rubber strip ( Red arrow in picture below) , then lift and pull forward the plastic grill/cover ( Green arrow) and the filter is underneath on the right hand side as you look from the front of the car.

Its usually the crap and debri build up around the drain hole that lets the water rise and seep thru the sponge gasket that sits between the body and filter housing
The chances are its squashed and warped, so you may want to get a new one before you start, as no doubt it will get destroyed when you remove the filter housing.
You 'could' make your own up and use lots of non-drying sealer as well to replace the sponge with.

The full width plastic panel is located onto the slotted plastic cover ( along bottom edge of windscreen) at the back by 3 locating lugs ( IIRC).

I cant remember on a 6 , but you may need to remove the filter housing to get to the drain hole on the passenger side in the corner.
pour water onto the drain and see where any water comes out behind the wing . it may be possible to back flush it with a hose pipe. You don't want to force any debri further down the drain though.
clean the surrounding area where water can sit before replacing the filter housing, you could even polish it to aid water running off the area.
There's a sponge gasket that goes between the filter housing and bodywork , this is the part that lets the water into the cars inside.

The price isnt to bad considering its from a main dealer , as I had to pay £200 + vat for a recon one for my passat 3 years ago

[markmad]

started stripping mine down today, i think the drainage hole on the bulkhead is the culprit its the one under the coolant botttle, the ccm is definately screwed-full of water and smells and looks like its burnt out. tomorrow i will be taking the seat out with the intention of taking the carpet up so i can have a good look at the wiring and look for any further damage!

[JohnyBoi]

I got the box out today... Same symptoms as you. Got a new box coming tomorrow from TPS £190+ vat. Not bad considering Audi want £294 for the same part!! Just need to re code the fobs and all should be well.

As for the leak... Drain under the water bottle isn't the culprit. The water in mine is slightly soapy which I think is the rear washer as it's not been working for a long time... I've been ignoring it to be honest!! So I tried operating the rear washer while the carpet was lifted to see if the hose was leaking... Couldn't see any water :-/

Need more investigating tomorrow before I put the module in! I will try the pipe from the air con that bilko suggested above [THUMBS UP SIGN]

[ahoooga]

The water in mine is slightly soapy which I think is the rear washer as it's not been working for a long time... I've been ignoring it to be honest!! So I tried operating the rear washer while the carpet was lifted to see if the hose was leaking... Couldn't see any water :-/

you did check your washer bottle had water in before you looked for the leak didn't you ?
Not 100% sure, but i think there's a pipe join behind the A pillar in the footwell

The fact you mention your rear washer hasn't worked for a long time , common fault is the pipe joints separate and the rear washer jet is prone to blocking up .
Any restriction in the water pipe is likely to blow the pipe open further back down the chain towards the washer pump. I think theres another pipe join in the tailgate as well .

You said back floor was 2 inch deep with water after rain over the weekend . I don't think the washer bottle holds enough water to get 2 inch deep , so you still need to find the ingress source.
have you checked your pollen filter gasket ? , just run a hose pipe by/under/around the filter box housing and see if water enters the front floor well .

[markmad]

i removed the passenger seat today and im glad i did, there is quite alot of water under the carpet(not that it moves much without the rear seat out)
its gonna take quite a while to get it all dried out, the foam under the carpet is very wet and theres no way i'll be putting the new ccm in until its dry, i also need to leak test it a few times to be sure of where my leak is coming from.
the wiring looks ok hopefully its not falling apart on the inside
does anybody know if there are any other units/modules under the passenger front and rear carpets?

p.s sorry for tagging myself onto your thread johnyboi

[JohnyBoi]

Plugged in the ccm and it's not talking to Vag Com and nothing happening. Could it be some fuses as well ? It did go with quite a bang the other day!!

[hedgebog]

my money is on the air con drain.same thing happened to me a few weeks ago.put a hose down the scuttle drain and keep your eyes open for it coming back up the grommet and onto the car.

[markmad]

Plugged in the ccm and it's not talking to vag com and nothing happening. Could it be some fuses as well ? It did go with quite a bang the other day!!

any news did you get it working?

i finally got round to ordering mine and it came friday, i only paid £196+vat from tps

hopefully get it fitted next week!

[markmad]

finally got the 6 back on the road today, all dried out leak tested new ccm fitted everything werking other than the remote central locking!
couldn't wait for the drive home, all was going great i was falling back in love with it again,
so i needed to stop at the shops locked it up(with the key)'
came out of the Shop and unlock it(with the key) and then the hazards start going mental and flashing really fast, tried locking it then unlocking it again and again but nothing happens they just keep flashing so i have removed the hazard switch so i can drive home, the rest of the doors appear to be deadlocked aswell!
there is also a clicking coming from the ccm i think or near there!
so i have disconnected the battery tonight so hopefully nothing else will go wrong until i can get it plugged in!
if anybody has any ideas or opinions they would be greatly appreciated!