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HELP! passat fills up with water!


passatchris
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Hi dobok1 -

Ref drying out the carpets.It took about 2 weeks before the carpet (Passenger side) to dry out.I removed the seat and lifted the carpet up as best I could and sponged out loads of water.

The sound proofing foam is very thick in places and holds lots of water.

My problem started with the low oil warning light coming on,water had got into the electrics as a result of the pollen filter failing.

I was perhaps lucky as the water was'nt on top of the carpet as compared with other Passat owners.

I used a fan heater and as well as towels and left the door open when at home parked in the drive way.

A VW garage quoted £700 to fix the problem,I did as much as I could and took the car back to the dealer to sort out the electric problem at a cost of £140.00.I would have done the electics myself if I knew which wires were at fault.

I do re-check now and again just to make sure there is no water under the carpet,all ok so far.

Good luck and let use know how you are getting on.

Edited by vwman
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  • 1 month later...
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I am now having the same problem with this rear footwell leak. I can not get into the pollen filter cabin to remove it as my god damn wiper arms are practically glued to the motors. (Anyone have any good ideas on how to get these off without destroying paint work, windshiled etc?).

I've read about removing the seat to lift that carpet to dry it all out. I've heard that if I remove the wire controlling the Air Bags etc in the seat it will trip and I myself wiill have to pay how ever much to get it reset? is this true if so is there anyway around it?

I thought I had dried it out as the top carpet is as dry as a bone, but putting my fingers down the sides and HELLO WATER! :ffs:

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  • 4 weeks later...

My Passat has the water in the CCU woes. Does anyone know where I can get replacement terminal blocks that plug into the CCU. I have two of them. A blue one and a brown one. They've corroded due to water damage. My CCU part no. is 1JO 959 799AH

I've attached a picture of them.

post-32756-137914445147_thumb.jpg

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My Passat has the water in the CCU woes. Does anyone know where I can get replacement terminal blocks that plug into the CCU. I have two of them. A blue one and a brown one. They've corroded due to water damage. My CCU part no. is 1JO 959 799AH

I've attached a picture of them.

After many phone calls to my local VW dealership I've finally made some progress in obtaining replacement terminals. If you have the CCU part no. as described above, or a derivitive of it, the VW part no.'s for the terminal blocks are:

Blue: 1JO 962 623 A

Brown: 1JO 962 615 B

I found this out by examining the old ones with a magnifying glass. The numbers are tiny.

Googling these numbers brings up suppliers, mainly in Germany, where they can be purchased as well as VW here in the UK.

They're only a couple of pounds each.

It's taken me a week to get this far. I should have them tomorrow then see how I get on fixing them in. +++

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Like most fellow sufferers I've got the wet patch syndrome. At first it was intermittent failure of the electric windows, Then we discovered the wet patch in the rear passenger footwell. Our so-called mechanic diagnosed that my wife had left the rear passenger window down a fraction and the wet patch was the result of driving rain. The problem got worse, first the windows, then the alarm got a mind of its own. Our local VDub stealers had it in for diagnosis. Guess what ? a new ECU was required and a drying out at a cost of over £1,000 + VAT with no guarantee of a result. They declined to replace the CCU without doing the whole drying out job, (things must be a bit quiet but at over £100 per hour i'm not suprised.)

I declined. We've lifted the passenger side carpets discovering the CCU module sitting in its case submerged in the passenger side underfloor well. (Which d*ckhead came up with that bright design feature ?). We've dried it out over a period of two weeks, located a used replacement CCU and now awaiting delivery. The question is, as the CCU controls the fuel filler flap, does anyone know a wheeze to get it open without resorting to a crowbar? The VW manual doesn't compare to the actuality of the electrics.

The car is a 2000 V6 4motion.

Any suggestions gratefully received. Does anyone know of an electronics whiz who can do an honest and accurate diagnostic check on CCU's Judging from the number of owners having the same problem, there has to be a market there for a good tekkie.

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If you have been following my posts you will know that I've located the blue and brown plastic terminals. I picked these up from the VW dealership the other day and found out that they do not come with any pins nor wires attached. I've had to buy these separatley. They cost £1.60 each (Ouch! :eek:). The VW dealership had varying sizes of wires on their system and had very little idea which ones I needed. Therefore, I bought enough of each size to make sure I could complete the job. Consequently, I've got loads and loads of them left over (PM me if you need some). They cost me £180 but that's still cheaper than asking VW to do the work.

If you have the same terminals as me you will see that there are 2 sizes of wires attached to them. Here's the part numbers for the ones you need:

Thick wire: 000 979 225 E

Thin wire: 000 979 131E

Count up how many of each you need (I can't remember and I've put everything back together now). VW sell them in bags of 5.

Anyway, The drain holes in the bulk head have been cleaned and the rubber grommets are in the bin. The pollen filter has had a new seal fitted and Furnox sealant applied to make sure it's 100% water tight. The car has been dried out, the new CCU (£75 of eBay) has been installed and all the wiring hooked up. Carpet and passenger seat have been re installed and everything works again +++

Who ever designed the B5 with this delicate box of electronics in the floor well needs to be certified.

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Hi Mapes12 - You have had quite a task in sourcing those parts,well done.

How did you get on with moving the wires from the old terminal connector to the new one.

A laborius job of cutting each wire from the old terminal, noting its position then using crimping connectors connect the new wire and insert the pin into the block. The new VW wires come in one colour, YELLOW, so you need to be organised in moving wires from the old blocks to the new ones. I obtained a used CCU that was previously from a Golf. Therefore, the keys needed to be recoded to the new CCU. Fortunatley for me my neighbour is an ex VW mecahnaic and did this for me but there is a section on the owners manual that tells you how to do this. However, once the work is done in fitting new wiring and a new CCU then I guess a VW dealership shouldn't be able to justify charging a fortune for recoding the keys. It took my neighbour about 10 minutes.

Good luck. +++

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Thanks for the tip, I found a quick and dirty way of releasing the fuel filler without the crowbar.

Here goes;

Remove the black capscrew at the right hand upper sidepost of the boot, carefully peel back the liner from the top above the right hand wheel arch. About a third of the way down the rear arch of the wheel arch is a bracket. If you wriggle your right hand behind the bracket you will find the relay that controls the filler cap lock. Using your fingertips, pull the actuating rod in a straight line motion towards the rear of the car (don't bend the actuating rod.)

After about a quarter inch of travel, you will hear a satisfying click as the fuel filler pops open.

Hope this helps someone else.

Cheers

vatman

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  • 10 months later...

hi, I have corroded terminals too, did the terminal relacement solve the problem?

A laborius job of cutting each wire from the old terminal, noting its position then using crimping connectors connect the new wire and insert the pin into the block. The new VW wires come in one colour, YELLOW, so you need to be organised in moving wires from the old blocks to the new ones. I obtained a used CCU that was previously from a Golf. Therefore, the keys needed to be recoded to the new CCU. Fortunatley for me my neighbour is an ex VW mecahnaic and did this for me but there is a section on the owners manual that tells you how to do this. However, once the work is done in fitting new wiring and a new CCU then I guess a VW dealership shouldn't be able to justify charging a fortune for recoding the keys. It took my neighbour about 10 minutes.

Good luck. +++

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hi, I have corroded terminals too, did the terminal relacement solve the problem?

It does my friend and is the correct procedure....then knowing which ones you need also. The other thing you need to consider is at the lower A pillar there is a big coupling a station where these buggers corrode also. water does travel up to these believe me. The easiest most cost effective way is to without the laborious task you can cut and join the wires with the red heat shrink butt connectors.

Check my thread on passat plenum chamber bungs info it tells you a fair bit there.

Edited by TIDYDUBS
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  • 2 weeks later...

im tempted to simply disconnect the bonnet alarm wires from the CCU since vagcom tells me that is what keeps trigering alarm (despite complete removal of switch) and the dash display shows bonnet open intermittently.

does anyone know what pins on the CCU correspond to the bonnet alarm switch?

or can point me to a wiring diagram?

p.s. I have dried it all out and selaed it all up, but just to make sure I remounted the ccu under the glovebox with self tapping screws!

Edited by cmp260
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As ive said check my thread on plenum chamber bungs.The reason being its still doing that is due to the coupling station on the bottom of the A pillar has a load of wiring connectors there all full of water and corrosion too.

Check my thread on it as you need to rectify the root cause of the leak first.+++

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  • 2 months later...
hi

there is still more water running into the back n/s foot well, im hoping its just the water runningdown. got the dehumidifier in the car workin its balls off, the area around and under the battery is dry. any ideas?

chris

there are two drain holes,one under the servo

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  • 4 weeks later...

Hi guys,

I have an '03 Passat estate, never had a problem with water leaks up until now, but came out to it the other day after some torrential rain, only to find myself paddling in water in the drivers footwell, checked the back and it was about 3 inches deep in water.

After checking the forums, I checked the plenum box, only to find the servo about half submerged and water lapping just below the pollen filter.

If you can call it luck, then I have had a bit, because all of the water is in the drivers side, and so far all of the electricas are working fine.

I drained the plenum by pushing out a bung from underneath. If you put your arm under the front edge of the plenum, roughly in line with the centre of the battery, there is a bung you can push out and replace later.

I removed the wiper blades and snapped my screen trim trying to get it off :ffs:

(didn't remove the two little fiddly trims at the bonnet hinges first)

After removing the battery and carrier, and sliding my alarm out of the way, I found both drain plugs completely blocked. I cleared the one under the servo and removed the one under the battery completely.

While it was all off I decided to check the pollen filter housing seal. Amazingly this was intact but being sponge was saturated.

I popped to my local VW dealer and got talking to a mechanic outside who went and fetched me some of the new sealer they use and just gave it to me, result +++

My problem now is, I can't seem to get the inner sill trim off so I can dry out under the carpet.

I've got the front "A" post end off, and all the way to the rear arch, but can't see how it come off at the back arch. I've removed the screw under the seat, but what else holds it in?

I tried to look at the links that passatchris put in, but they're dead.

Cheers guys, and thanks for reading to the end.

spadders

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  • 2 months later...

Ive done the drain holes, pollen filter, dried out the carpet, and repaired the connecters, and still found water in the car after the next rain fall, which soaked the CCU and blow a fuse, now the read doors are locked. Currently waiting for a replacement CCU which will need programming.

I did some tests and found the water was coming through the bottom of the passanger front door piller. :eek: Yep yet another place where water can get in. :ffs: I took the multi connector housing of the boddy work, and found two small holes with water running through. So is the windscreen rubber or the Sunroof is most likely?

Ill keep you posed.

After reading some of these posts, I am begining to think VW did this to get more after service fees.:rolleyes:

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