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ABS poltergeist
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dutchviking
 


Member Since: 07 Oct 2011
Location: Oslo
Posts: 54

Norway 2007 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3
ABS poltergeist

Hi, wonder if someone has seen this one before. When you drive from standstill upto about 50 km/h you feel and hear a thumping/clunking sound coming from left section of the engine compartment (LHD), feel it most in the throttle pedal. Thump-thump......thump-thump-thump.....thump-thump.....thump. Goes away when driving faster or do not notice anymore.

No faults - no warning lights

At the moment you de-activate DSC by pressing the switch it stops.

So far:

swapped the yaw sensor with another one - no difference
replaced ABS modulator - no difference

checked live values with IID: wheel speed at all 4 corners.
Steering angle ok (When I got the D3 it had a loose Steering wheel sensor collar but glued it in place and sits tight now, giving normal steering wheel angle readings (did a calibration as well)

The giveaway must be DSC - without it being active the thumping is gone?



Hope someone can help.

many thanks on forehand  
Post #214814222nd May 2020 4:59 pm
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

The DSC works in conjunction with the switch pack in the centre console. Firstly has any liquid got in there - drink, sunroof etc. There is a connector under the switch pack that has given problems before, also switch pack may be faulty. Another problem could be different size/type of tyres on the front  
Post #21508982nd Jun 2020 5:14 am
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MikeBob
 


Member Since: 19 Sep 2016
Location: Pretoria
Posts: 105

South Africa 2010 Discovery 4 3.0 TDV6 SE Auto Ipanema SandDiscovery 4

check the wheel bearing on that wheel  
Post #21509072nd Jun 2020 7:40 am
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dutchviking
 


Member Since: 07 Oct 2011
Location: Oslo
Posts: 54

Norway 2007 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

@Globetrotter448: what switch pack exactly do you refer to? I am aware of the small brown/orange connector connecting to the gear lever cover, one connector sits down in the right corner of the gear lever housing, you think that one can cause problems?

@mikeBob: All wheelbearings seem fine with no play. If TC kicks in, why doesnt the light show on the IPC.

Could it be some kind of self test that is overdoing it?

All tyres are new and exactly the same.  
Post #21509472nd Jun 2020 10:14 am
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Globetrotter448
 


Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1782

Australia 2007 Discovery 3 4.0 V6 Petrol SE Auto Java BlackDiscovery 3

The connector is c0700 and its under the 'yellow' switch which controls hill descent  
Post #21509722nd Jun 2020 11:34 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10363

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

check tyre size is the same front / rear.
and pressures are correct.

Check steering angle sensor is correctly calibrated


Maybe even suspension bushes?  
Post #21509772nd Jun 2020 12:03 pm
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dutchviking
 


Member Since: 07 Oct 2011
Location: Oslo
Posts: 54

Norway 2007 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

Tried with a different rotary switch but same result. Newer tires of the same size. Noticed that my own MY07 does the same, but only one clunk is felt when driving away. Must be some self test or activation. The giveaway must be that when turning off DSC it doesnt happen any more.  
Post #216183318th Jul 2020 9:29 am
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darrind
 


Member Since: 04 Jul 2008
Location: In A World of My Own!
Posts: 2863

England 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Had a friend with a 2006 that did the same on the rear left side randomly- his was chafed wire allowed A short - took a lot to find it. No lights when it did it either Must stop buying shiny toys....  
Post #216184018th Jul 2020 10:04 am
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