[s-cars] Sunroof Redundant

[Fred Munro]

Hi Bill;

Nope, wasn't me, I'm innocent, I wasn't even in town...

I've written up a lot of UrS procedures, but I don't recall the sunroof as
one of them. I might have put something out on the 200 sunroof as I remember
fiddling with it to get the proper "leading edge low-trailing edge high"
configuration to get rid of that annoying high speed whistle. I can't find a
write-up on that either!

Sorry!

Fred Munro
'94 S4

P.S. I've attached a write-up by Bruce Mock on sunroof switch repair that
may help you out.

>> Bruce Mock wrote:

 My 'roof' used to have a mind of its own too - It would open/close when
going over bumps - kinda em-bar-ass-ing aint it?  Well the EE in me came
out and said "Hey, I can fix this - it can't be that hard, right?"  This
silly attitude has gotten me into several messes in the past - but NOT
this time.

If you CAREFULLY remove the sunroof/interior light panel from the
headliner (pull down from the FRONT first - not the rear) and disconnect
all the wires so you can completely remove it you will see a round
switch with some wires going into it - the sunroof control switch.  Take
a good look at the switch and it should become obvious how to  separate
the top half from the bottom half.  Be careful and go slow or you will
break the little plastic clips that hold the two halves together.
Slowly separate the two halves and be careful that nothing falls out on
you.

Once inside you will see that the switch is really just a 3-pronged
wiper-arm affair that runs along some electrical paths as the knob on
the switch is turned.  The paths and the little metal wipers were very
dirty on the unit in my car - I think that these 'marginal/mixed
signals' from the dirty wiper confuses the motor control unit and hence
the bizarre sunroof operation.

 I merely cleaned and dried the paths w/ a foam "q-tip" soaked in
alcohol and also "roughed-up" the contact points on the wiper arm using
some fine grit sand paper (don't get carried away here - just a little
roughing will do)  You could throw in a small qty of dielectric grease
but I chose not to do this.

ASSY is reverse of removal as they say

I have not had a roof-mind-of-its-own problem for over a year now.
Worst part was repairing the broken clip at the rear of the cover B/C I
did not know how to remove the panel (remember - pull from the
front-down NOT the back!)

I wonder how much $$$ the stealer wants for one of these little gems??!

HTH

Bruce "I love it when I can fix something expensive myself" Mock

BTW - took my wife/kids out and about in the S4 the other night in the
middle of a snowstorm to look at Christmas lights and get into the
Christmas sprit.  Then for grins we went to a large open parking lot to
do some 'donuts'.  My kids thought it was great fun.  My wife said I was
a bad influence on our soon to be driving teenager :)  Waa Waa Waa.

__________


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Bill Mahoney
Sent: June 9, 2004 11:48 AM
To: s-car-list at audifans.com
Subject: [s-cars] Sunroof Redundant


Folks;
At risk of flaming up dead horses, this is one of those topics that you
read about in a post and think "oh yeah that's good" and then someone
else posts something else and you think "oh yeah well that's good info
too, but I don't have that problem now, but when I do I'm going to come
back and read these posts more thoroughly."   Then too sometimes I think
this is so informational that I print it out and file it.  Bottom line
is then when I try to find the posts or worse yet, find the piece of
paper. forghettaboutit!  Can't be found.
So, that's where I'm at with my sunroof.  It actually works okay but
requires to be oriented in the 10 oclock and 4 oclock instead of 12
clock and 6 oclock positions to be closed properly, otherwise the
trailing/back edge sits too low.  This is very annoying whilst cruising
at 163mph:/
I know Fred Munro has made numerous posts WRT sunroof repairs,
butofcourse I cannot find em.  I am not sure if this problem is resolved
by switch cleaning or what?
Perhaps now that summers here it's a good time to review some sunroof
mtce procedures too if there are some to share.
It is good to keep it cleaned and well lubricated to preclude demonic
possession (i.e. opening and closing on its own etc) I know.  This could
be overlooked though since there are so many other things to look
after/upgrade.
Thanks in advance and any thoughts, comments, links or fixes will be
very much appreciated.
Cheer's
Bill m
Ps  Received my 9011/2 HIR bulbs yesterday and as soon as I can get them
installed (tonight?) I'll post buttdyno results.


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