I have an Audi A6 4.2 Avant, '99 model year, and I wondered if anyone
could please suggest the source of an electrical problem I'm having...
A couple of days ago I tried to adjust one of the door mirrors (using
the knob between the front seats).
It was quickly apparent that this had been a Bad Idea. Firstly, the
mirror didn't move. Secondly, the climate control stopped working, the
lights in the centre instrument panel went out, and the DIS stopped
showing the outside air temperature, and indicated that there was a
failure of the oil temperature & level sensor.
I assumed that a fuse had blown, and consulted the driver's handbook to
find out which one it might be. As there didn't seem to be any one fuse
that would cause a failure of all these things, I inspected all of
them - but none had blown. Clever people who know about cars (i.e: not
me) suggested it might be caused by the failure of a relay. I took the
car to two Audi dealerships, who laughed patronizingly at my suggested
relay-failure diagnosis, and indicated that they *might* be prepared
(in a week or two, and if I paid them a few hundred pounds) to look at
the car to see what the problem might be.
(To digress: is it only here in the UK that customers are treated with
such disdain by Audi dealers, or is it a more widespread problem?)
I have a VAG-COM, which now reports only that there's a failure of the
"Outside Air Temp Sensor (G17)" and of the "Sensor for Oil
Level/Temperature (G266)". Is it possible that these two components,
plus the electric mirrors, have failed simultaneously? Or is there,
perhaps, an underlying problem?
Any suggestions as to the source of the problem would be very welcome,
and would earn my heartfelt gratitude.
The T44 series had similar problems when wires broke and shorted in the drivers
side door hinge (rubber accordion looking thing). This was due to constant
flexing over time when the doors were opened. The wires to your mirrors are
routed in the same place and may be a similar problem.
This could affect the other systems that went out.
Peter H wrote:
Hello, again, Peter.
I just noticed this question from you after checking to see if there
were any other comments on the signal flasher problem you helped me
with the other day (thanks, again). I don't know if this helps at all,
but the answer you received already indicated something remarkably
similar to another issue I'm having in that its a wierd combination of
things and it seems to come from the left side somehow near the doors.
My 2002 A6 simultaneously lost power to the windows, locks, roof, and
interior lights (not panel lights) a while back Naturally, the roof
was up at the time, too. The dash also warned that the front right and
both back doors were open, regardless of whether they were open or
closed. Interestingly the doors locked okay from the outside using the
remote, but the alarm didn't beep when it did. It did arm it, though,
because with the top up, leaving the car any wind around triggered the
interior motion sensor, blinking the lights and beeping away (that
worked). So it was a bit of a hassle. I didn't have a test light, so I
asked a mechanic who had one to run through them with his. Nothing
showed up as bad, but he may have missed it. I eventually went through
the candidate fuses manually and located one 10a fuse that really was
out and everything worked fine after putting a new one in. It's
happened several more times and I've been trying to narrow it down to
where the possible short might be. So far, I've realized that it's
only when someone has been sitting in the back left seat, and I think
it's somehow associated doing something to open the door (from either
inside or outside) with the engine running. Fuses are cheap, asking
the dealer to trace through the whole electrical system would be
expensive, and I don't have people in the back that often, so it's
more of a nuisance than anything else, but I'll be watching here for
any other possible solutions and having folks slide in and out from
the right in the meantime..
Here in the U.S., it can happen too. Unless you Know What You Are
Talking About (tm), and then their sneering is kept on a short leash.
We call them Stealerships, and the smart ones among us try desperately
to avoid them at all costs.
With several hundred pounds, you could test the relay advice yourself.
Find the replay and replace it. Cheap, and if it's not bad, you could
offer it for sale elsewhere, or keep it as a spare.
Yeah, the dealer attitude and lack of competance really drives away a
lot of business here in the U.S.
Thanks, Ed. The problem I'd have is finding the (possibly) offending
relay. I believe there are at least 23 of the things scattered round
the car in various inaccessible locations. What I've been trying to
find is a guide that lists the relays and their functions - so far
I hate to say it, but here goes:
Funny, but in my owner's manual, it says EXACTLY where each relay is.
Anyway, once you buy the offending relay and Bentley, your couple
hundred quid are spent. And it may or may not solve your problem.
I wish I could be more helpful. Or hopeful.
Not available in here the United Kingdom, unfortunately.
Not really strange, no. You seem to have mistaken "inaccessible" for
"unknown". I know where the relays are, but having to remove half the
dashboard first makes access to them difficult. This may be a
peculiarity of right-hand-drive cars.
Thanks for your help.
Robert Bentley and Associates (IIRC) ship anywhere in the world. The
manuals are expensive, and LHD-centered. They are EXCEEDINGLY helpful.
They can pay for themselves on the first use.
My apologies. I did misread your comments.
Removing the undertray is not complicated, nor difficult. It is a
pain, I will agree. And the underhood ones are very easy to access.
IIRC, the ones under the RH carpet (in the footwell there) are the
hardest to get to. I suppose you're going to tell me next that this is
where that relay is located. Murphy's Law and all. The LH footwell
(up under the dash) are quite simple to get at, after the undertray has
Yes, there is that. That is one UK practice that I'm glad didn't catch
on here in the colonies.
One caution however.. The newer Audi maintenance manuals (through
Bentley) are of no help at all when it comes to troubleshooting DTC's.
For example, the A3 manual, for any controller that might produce a
"With ignition switched off, connect Vehicle Diagnosis, Testing and
Information System VAS 5051/5052 select "Vehicle Self Diagnosis"
Vehicle Diagnosis, Testing and Information System VAS 5051 / 5052 ,
connecting and selecting functions ."
So, unless you own or lease a a VAS 5051 or 5052, you'll need
Email reply: please remove one letter from each side of "@"
Spammers are Scammers. Exterminate them.
I looked through my Bentley for useful clues to your situation.
The two main categories for the mirrors were "with" or "without" folding
In looking at both sets the only items that the manual referred to is the
switch between the seats and the other item is the controller which it says
is 'In a protective box, under the carpeting under the drivers seat". This
is from a US version of the manual so.......
Both the switch and the controller seem like likely next steps as there
wasn't any info on the mirrors themselves (or it didn't jump out at me).
In reading your subsequent posts, it sounds like you know where the relays
are (yes, annoying to access) and others in the group have offered the
'broken wiring in the door' as a possible problem.
If you have the folding mirrors, perhaps that's another wire wear area.
Thank you very much for doing that - and please accept my apologies for
not acknowledging your kindness sooner.
I gave up and contacted the local dealership - a loose connection,
which was fixed very quickly.
Many thanks again.
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