S40 (New) General : - 'Clunk' When Reaching About 10mph After Initial Start-Up

Roger Breaker · Jun 1st, 2012, 18:44

Hi All.

I've hunted a few times for this but struggle to find the right wording, so apologies if it's been covered a guzillion times!

As the title says, when reaching about 10mph from initial start-up a rather pronounced 'clunk' is heard ('08 S40 2.0 Petrol R-Design). It's only that once when you first start and not for the rest of the journey. I'd assumed it was the auto door lock switch kicking in (although I've never felt the need to engage this so far), and thought that maybe an actuator or something still cuts in despite not actually having it set to lock. Would I be right in this assumption?

Any probable explanations appreciated!

Daim · Jun 1st, 2012, 18:48

ABS selfcheck.

Guru · Jun 1st, 2012, 18:50

ABS self-test

Roger Breaker · Jun 1st, 2012, 18:52

Thanks! Can't argue with that! Why the clunking though, would assume (obviously wrongly!) that 'ABS selfcheck' would be a quiet electrical-type thing?

Ninja59 · Jun 1st, 2012, 19:05

volvo prefer to do a proper moving check

i mean it is all right some sensor saying it is but what if the sensor is rubbish like on some cars

plus it clearly will keep it at it's optimum setting.

Never actually had the ABS kick in on me in the volvo actually...or not that i know of and now and again i have stamped on them.

Guru · Jun 1st, 2012, 19:08

An electrical impulse causes a mechanical snap at the calipers.

Clan · Jun 1st, 2012, 19:11

Quote:

Originally Posted by Roger Breaker

Thanks! Can't argue with that! Why the clunking though, would assume (obviously wrongly!) that 'ABS selfcheck' would be a quiet electrical-type thing?

The electric pump runs to check it is ready for action on that journey .

Nikesh · Jun 1st, 2012, 19:37

Quote:

Originally Posted by Daim

ABS selfcheck.

Ahhhhhhaaaa, I allways thought it was the AC Compressor.

Now I know....

The things you learn on here....

darkiulis28 · Jun 1st, 2012, 19:37

I have got the same problem. So took it to the Volvo garage, also added few other things to do i.e air con top up as i have this car only couple of months. So they had it all day, and the end result was "sir we dont know what is it" so they have booked me in with a "master tech" thats how they call him the man who specialises only on Volvo. That just made me laugh, but anyway i am gonna give them a chance. Not paying a penny anyway.

Roger Breaker · Jun 1st, 2012, 19:55

Thanks for all the replies, absolutely nothing to do with the door locking system then! You've finally satisfied my need for a proper explanation. Right, next question...

Jun 1st, 2012, 18:44	#1
Roger Breaker Junior Member Last Online: Jul 23rd, 2013 05:27 Join Date: May 2011 Location: South Norfolk	'Clunk' When Reaching About 10mph After Initial Start-Up Hi All. I've hunted a few times for this but struggle to find the right wording, so apologies if it's been covered a guzillion times! As the title says, when reaching about 10mph from initial start-up a rather pronounced 'clunk' is heard ('08 S40 2.0 Petrol R-Design). It's only that once when you first start and not for the rest of the journey. I'd assumed it was the auto door lock switch kicking in (although I've never felt the need to engage this so far), and thought that maybe an actuator or something still cuts in despite not actually having it set to lock. Would I be right in this assumption? Any probable explanations appreciated!

Jun 1st, 2012, 18:48	#2
Daim Brit in Germany Last Online: Yesterday 06:58 Join Date: Jan 2011 Location: Bremen	ABS selfcheck. __________________ The Best Nation Is Imagination 2010 V70 (Type 135) D5 (D5244T10) Automatic (TF-80SC)

Jun 1st, 2012, 18:50	#3
Guru Premier Member Last Online: Oct 25th, 2023 07:46 Join Date: Feb 2009 Location: Between chair and keyboard	ABS self-test __________________ Volvo S40 2.0D momentum \| 100kw/136bph \| 2005 \| Euro III \| 49mpg \| Electric silver

Jun 1st, 2012, 19:08	#6
Guru Premier Member Last Online: Oct 25th, 2023 07:46 Join Date: Feb 2009 Location: Between chair and keyboard	An electrical impulse causes a mechanical snap at the calipers. __________________ Volvo S40 2.0D momentum \| 100kw/136bph \| 2005 \| Euro III \| 49mpg \| Electric silver

Jun 1st, 2012, 18:52	#4
Roger Breaker Junior Member Last Online: Jul 23rd, 2013 05:27 Join Date: May 2011 Location: South Norfolk	Thanks! Can't argue with that! Why the clunking though, would assume (obviously wrongly!) that 'ABS selfcheck' would be a quiet electrical-type thing?

Jun 1st, 2012, 19:05	#5
Ninja59 Probably Akita's Toyboy.. Last Online: Dec 27th, 2023 22:24 Join Date: Jul 2010 Location: A House.	volvo prefer to do a proper moving check i mean it is all right some sensor saying it is but what if the sensor is rubbish like on some cars plus it clearly will keep it at it's optimum setting. Never actually had the ABS kick in on me in the volvo actually...or not that i know of and now and again i have stamped on them.

Jun 1st, 2012, 19:37	#9
darkiulis28 Junior Member Last Online: Jul 22nd, 2023 07:40 Join Date: Mar 2012 Location: Leeds	I have got the same problem. So took it to the Volvo garage, also added few other things to do i.e air con top up as i have this car only couple of months. So they had it all day, and the end result was "sir we dont know what is it" so they have booked me in with a "master tech" thats how they call him the man who specialises only on Volvo. That just made me laugh, but anyway i am gonna give them a chance. Not paying a penny anyway.

Jun 1st, 2012, 19:55	#10
Roger Breaker Junior Member Last Online: Jul 23rd, 2013 05:27 Join Date: May 2011 Location: South Norfolk	Thanks for all the replies, absolutely nothing to do with the door locking system then! You've finally satisfied my need for a proper explanation. Right, next question...

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