s80 yr 2000 tdi ticking

ticking noise from under dash when decelerating thru 75 - 70 - 65 mph when
de-clutched and aircon off, tick tick tick tick - its driving me nuts nuts
nuts , trims been checked, hearing aokay? noisier when weather cold,

 

Check exhaust manifold gasket(s) for leak. Don't write me off as mad, check on
the VOC website Technical Forum. URL is http://www.volvoclub.org.uk At third
page, top left, there is a drop-down menu. Open it and scroll down to Forums.
Click on that and register as a forum member. You can then edit your replies and
access the archives. If you find what you are looking for (there is a search
facility) you may want to consider becoming a member of the Volvo Owners Club.
Look on the same drop-down menu for the appropriate page.

Cheers, Peter.

: ticking noise from under dash when decelerating thru 75 - 70 - 65 mph when
: de-clutched and aircon off, tick tick tick tick - its driving me nuts nuts
: nuts , trims been checked, hearing aokay? noisier when weather cold,
:
:
:
:

 

I have a ticking noise in a V70 T5 that happens when braking down from
fairly high speeds and is more pronounced on a progressive slow down
on a downhill slope. The noise appears to come from somewhere in the
back and can be heard at around head height from the driver's seat.

The noise obviously does not come from anywhere at the height it
appears to come from but is reflected from somewhwere else which may
be your case as well.

Although the driver's handbook makes no mention of my car even being
equipped with any form of EBFD (Electronic Brake Force Distribution),
it is that which is causing the ticking. My car is fitted with STC
(Stability Traction Control) and nobody seems to know if EBFD is
fitted only with STC or with others as well but the ticking noise is
the back wheels sending pulses to a controller to make sure that the
rears do not lock up when most braking force is on the fronts.

I hope this makes some sense to you and avoids the need for three
visits to a dealer that another poster paid for with no result.. When
asked, dealers return a blank expression when asked about EBDF but it
is definitely fitted on some models and the pulsing ticking which is
annoying is just the various components doing theiir job.

Traduk

 

My '99 V70 has the same intermittent "feature". Long, gentle braking
induces a tick tick tick that seems to come from the left rear wheel.
Downhill and around corners only. Brake a little harder and it goes away.

The Volvo service guys insist that it all checks out OK. They did
comment that the brake force distribution mechanism does do a self-test
periodically and I may be hearing that. It sounds feasible, I suppose,
but I don't know why it only seems to come from the left rear wheel. Or
maybe it *is* a function of the system putting most of the effort into
the front brakes?

Seems a common feature.

Chris