A4 Cabriolet Roof problems

**wmccann** · 14-03-2009,10:32 AM

Hi all,

I am having terrible problems with the roof on my cabriolet. Started in December when I tried to open it and got a message in the console "soft top cannot be used". rather generic.

Did some investigations and manually opened and closed it etc but to no avail. Then I found that the rear right window would not go down. Having got a Vagcom I queried the car and got back that there were no communications with the unit.

I got a second hand unit, replaced it and the window now works.

Then tried the roof, but it would not open. after some messing I got it to open all the way to the point where it tries to lift the rear cover, this goes up a few cm and then everything stops. if I pull the switch again it goes up a few more mm and stops again. I cannot get it to open.

If I then close the roof it goes back as usual until the front is supposed to lock in, At this point it stops half engaged. I have to press the switch down about 4-5 times to get it close (each time it engages a tiny bit more).

When I look in vag com I get the following errors:

01618 - Automatic convertible top valve 2 (N272)
009 - Open or Short to Ground

01984 - Power Convertible Top Valve 2 (N341)
009 - Open or Short to Ground

02024 - Perfrom adaptation
005 - No or incorrect basic setting /Adaptation.

(the last one only appeared after I tried to reset the adaptation)

Any help is appreciated,

Thanks,

Walter.

**Crasher** · 14-03-2009,12:10 PM

Release the roof manually with the key both at the header rail and up inside the rear arm rest location. Lift up the rear deck covering and make sure that one of the rear seat belts has not been caught up in the locking pins and dragged down inside, this is common and punches a hole in the belt. If all looks OK, fold the roof down and then back up and lock it all down, it may now start working.

**wmccann** · 14-03-2009,08:23 PM

Thanks for that, unfortunately it didn't work.

Any other ideas?

Thanks,

Walter.

**Crasher** · 14-03-2009,08:28 PM

I will have to look at those faults in Guided Fault Finding next week.

**wmccann** · 16-03-2009,02:23 AM

Thanks Crasher,

Did some more messing with it and it is now closed and when I check the error codes I get the following:

Error Code 01996 - top lock switch (F294) Open

Thanks,

Walter.

**Crasher** · 16-03-2009,11:49 AM

I think from that you can assume that F294 is faulty, 8H0 959 985 at £38 which is in the centre of the front bow with the top lock motor and is a bit of a pig to get at.

**wmccann** · 16-03-2009,07:27 PM

Thanks Crasher,

Took it apart and found that the nuts holding the motor were loose, one actually had come out. Put it all back together and now that switch is working but still getting the other errors, - Tested with a multimeter and the switches worked fine.

Do you know where the "top valve" is located? - N272, N341

Also, in vagcom do I reset the roof using adaptation 00 or 01 (if I do 00 it says 05 is incorrect please set)

Also, Do I need an installer code?

Your help is much appreciated,

Thanks,

Walter.

**Crasher** · 16-03-2009,09:33 PM

I will look on Guided Fault Finding tommorow, I am still learing the ins and outs of how these roofs play up but one trick I have learnt is the one I told you eralier, fold the roof down fuuly manualy with the ignition on and then back up and lock it down, this noramly performs the basic settings.