Great write up! I cant believe VW never put out a TSB for this issue, especially since the problem is so close to the ECU. I've read allot of posts on here about people having the "silent chirp isuue", atleast now they will know how to fix it. Thanks for the info!!!

 

Thanks for your post it pointed me in the right direction for what I thought was a clogged sunroof drain.

I found an easier method to resolve the collecting water and clearing the leaves via the left hand fender liner. Remove the T20 (Torx) Screws from 11:00 to 3:00 along the outer edge of the liner; there is one T25 underneath, remove the two 10mm nuts from either side of 12:00 on the interior side of the liner. You should be able to pull the liner back at approximately 2:00 you should see the bottom of the drain extending about an inch, pull the entire thing out, and be prepared for a lot of water. Carefully put your finger in the hole to remove the leaves. Approximately 30 minutes start to finish.

 

That sounds a lot easier

 

by the way, I did this work and sure enough the drain was completely obstructed with leaves, nearly a gallon of water, and plenty of mud too. Here is my update:
I removed the LEFT fender liner completely (easy, T20, T30 and 10mm nuts). I also found that the torx bolt at the bottom of the liner is a T30 and not a T25. then, I cleaned the drain and found inside a plastic cup with a aluminum looking washer (two different strainers) about the size of a quarter coin. After careful inspection the plastic cup will fit inside the drain rubber plunger to keep it in place. I used a hose to squirt water into the drain (from the bottom) and clean as much dirt as possible. After several times you can run your finger inside to verify that the dirt and leaves are completely out. Once the drain was clean, I inserted the plastic cup back into the drain with a long piece of safety wire attach to it. Then, I inserted the rubber plunger into place making sure it seated correctly all the way around and then I pulled the safety wire until the plastic cup seated correctly into the rubber plunger. Lastly, I cut the safety wire off and pulled it out of the way in two pieces. This was used to pull/secure the plastic cup into place and then you simply discard the safety wire (you could also use simple slim string). I discarded the aluminum washer as I had no way to use it again and it really limits the drain to very small openings. It almost looks like a strainer in your shower drain. To finish the job I cleaned the rest of the liner inside and out, then I also cleaned all the inside of the wheel well as it was extremely dirty and it was a perfect opportunity to give it a nice look around. I used soap and water but I was careful not to over spray the electrical connectors in the area.
Here is the interesting part: then I proceeded to remove the RIGHT side liner and I found the same drain on the RIGHT side!!! Of course, I cleaned it the same way I did the left hand but interesting that there was NO strainer cup or washer strainer on the right side. I also found that the right side was not as dirty and it was not full of water at the time of cleaning. Remember, clean BOTH sides!!!

 

Hello everyone,

thanks to 4xMotion for the excellent step by step guide and also to Samebutdif for the alternate option.

I appreciate that this thread is over a decade old but with the benefit of hindsight I would like to it in the hope that it will help someone in the future.

After watching a Porsche mechanic do the water drain service on a mk1 Cayenne it is advisable to vacuum the leaves and any standing water from above as 4XMOTION describes AND also to remove the rubber drain bung from inside the fender liner as SAMEBUTDIF mentions. Only by doing both will you know that the entire drain channel is free of obstruction and that its likely to remain that way for a decent amount of time.

If you don't do extreme off roading through waist deep fjords or other bodies of deep standing water, you can also trim off some of the bottom of the rubber bung (thereby opening the diameter of the flexible bung) to prevent further debris getting lodged inside it (from above) to prevent further blockages. If you're not wishing to do this then the drain service should be added to your list of annual maintenance.

There are now videos on YouTube that show this service in great detail if anyone wants a visual to go with the great write up from 4XMOTION.

Search PORSCHE CAYENNE DRAINS and you should find several people who have videos to help.

 

Just throw the rubber bungs (drains) away!

 

Or put them in the boot so the next owner doesn't have to buy new ones.

 

Went on this page originally to say I've got error code 1134 ALARM HORN. So will be doing this service myself very soon. Have got a spare horn in case it is totally ruined.

Will take some pictures and post when I get around to doing the job.

 

Have you done this yet. I'm trying to replace my alarm horn and got as far as the fusebox (half disconnected), but still can't get underneath it to clean out the leaves and whatnot. I can see the alarm horn, just not enough room to get to it!! Ugh!!!

 

Hi Superfly,

Ironically, two days ago I got as far as the fuse/relay box and couldn't get any further either.

Was at the point where I was more likely to break something else that is still work8ng trying to get to it.

Also had a good look on the other side for the air quality sensor. Removed the bank 1 ECU but still couldn't see it either. Broke one of the cheap plastic ECU retaining clips.

I looked at it and wondered why it wasn't rubber coated over spring metal? Guess Piech and his merry band of men in their infinite wisdom decided that it wasn't necessary.

I guess back in 2005, spending £53,000 on a vehicle still got you the cheap plastic components ie fake wood, etc. as on anything else.

Am going to cavle tie it in place for now til I can think of a better solution.

 

As I do different projects on the truck I am taking pics so I can add DIY articles on here to help others.

Although the DIY content that is on here is excellent, it amazes me that there isn't more content ie. Alarm horn/air quality sensor replacement, etc. with pictures as members will have done these repairs at some point over the last 17 years?

Guess it shows that a percentage of members are on here just for themselves.

Ending on a positive note, everything I repair/replace/maintain on my treg will become a DIY article on here to help others and improve the site.

Regards,,

Phil

 

First, Thanks Phil. I see you are already starting to post pics. You are helping to rebuild the forum.

it amazes me that there isn't more content ie. Alarm horn/air quality sensor replacement, etc. with pictures

I understand your point. There is something that you probably don't know. This forum is suffering from hundred of lost pics. We had the photobucket problem, but who didn't. We also had a lot of people who used to post pics on other file sharing sites or on their personal webpages. Those have gotten lost also.

It seems like the forum software often does not show broken picture links. So, you see a post of text, but at one point there were pictures in many of those posts also. You can't even tell many times that those pictures were ever there.

Upload the pictures directly to the forum. Those are the pictures that survived and that are still here. Many or most of the pictures on third party sites are no longer here.

 

Hi Nicky,

Thanks for explaining that. I had heard of Photobucket but didn't realise there was an issue with them.

Does that mean that the diy posts that I was moaning about earlier that probably should be on here by now have been deleted or archived?

I firmly believe in a co-operative system where everyone contributes when and where we can towards the greater good and we all reap the benefits.

Can't stand wasters or life long spongers that can contribute to society but never do.

 

Here you go

Alarm siren removal

I have a 2005 2.5tdi Treg. a couple od days the alarm started to go off even when the car was unlocked and with the key in ignition and engine running. I'm assuming the siren is faulty, I had to disconnect the battery to shut it down. Anybody experienced this before and how do you get the siren...

www.clubtouareg.com

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Merci, mon frere.

 

Mais de rien


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