ericsddfdd
Member Since: 28 Jan 2023
Location: stockholm
Posts: 8
  
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| traction control system in disco 4 is not working correctly |
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I was stuck in the snow traction control system did work properly in a Land Rover Discovery 4, 3 wheels spinning and slipping one wheel not spinning normally brake should be applied on the spinning wheel so the power goes to the wheel which is not spinning ( two front wheel and right rear wheel spinning). I do have increased revs it didn't work if anybody can explain why thanks .there is a film on youtube that shows discovery find immediately in all modes where the power should go and the wheel with traction begins to spin. I presume that there is a bug in the software in some
initial condition onboard computer can not detect that one wheel is not spinning.it is very strange that a car can detect and transfer the power to the
wheel with traction immediately almost *film on youtube. Sometimes you should increase the revs as a lot of people experience. and sometimes it is not working in my experience
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 31st Jan 2023 10:32 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Last edited by Flatlander on 21st Feb 2023 10:21 pm. Edited 1 time in total
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| 31st Jan 2023 10:40 pm |
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swansty
Member Since: 21 Sep 2008
Location: Northern Ireland
Posts: 939
  
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Ive had similar, sunk a rear right into boggy ground. Front right was on grass/soft ground but not sinking. front and rear left were still on a tarmac road. Car spun and dug deeper and had to be pulled out a by a trooper.
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| 1st Feb 2023 1:43 pm |
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ericsddfdd
Member Since: 28 Jan 2023
Location: stockholm
Posts: 8
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Flatlander wrote:That is very strange, what TR mode were you in? was the DSC on or off? - any idea if it was a front or rear wheel that wasn't spinning?
thanks I have tried all modes withDSCand without it did not work I have more than 30 years of experience in industrial computing I am sure there is a bug in the software for some initial condition it can not detect a slipping wheel if you see the following film it shows that car should react immediately almost in all different mod only different time for reaction depending on mod, meaning car should brake the spinning wheel so the mechanic of differential transfer the power to the other wheel
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| 2nd Feb 2023 9:02 pm |
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ericsddfdd
Member Since: 28 Jan 2023
Location: stockholm
Posts: 8
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swansty wrote:Ive had similar, sunk a rear right into boggy ground. Front right was on grass/soft ground but not sinking. front and rear left were still on a tarmac road. Car spun and dug deeper and had to be pulled out a by a trooper.
so I think traction control is a real joke in landrover sometimes it is working sometimes it doesn't a typical example of software bugs. land rover is very secretive about how it is supposed to work a lot of talks and nobody really knows how it should work and why you should try to increase rev or turn off the DCS ....
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| 2nd Feb 2023 9:12 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Last edited by Flatlander on 21st Feb 2023 10:22 pm. Edited 1 time in total
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| 2nd Feb 2023 9:28 pm |
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ericsddfdd
Member Since: 28 Jan 2023
Location: stockholm
Posts: 8
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As you see I am not the only one ... problem is not with ABS . problem is with the traction control software this software should detect that the wheels are spinning and the car is not moving once it has these two pieces of information it acts an the transfer case for modifying the torq between two axels or on ABS or both different mod are only there to tune the intervention time in some condition it can detect immediately in some other condition it gets lost
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| 2nd Feb 2023 9:38 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Last edited by Flatlander on 21st Feb 2023 10:22 pm. Edited 1 time in total
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| 2nd Feb 2023 9:59 pm |
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ericsddfdd
Member Since: 28 Jan 2023
Location: stockholm
Posts: 8
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Thank you for your response. As you can see, there is another individual who faced a similar issue. I need to get some answers and everyone has advised me to either increase the rev or turn off the DCS. However, as seen in a YouTube video, the car reacts well without making any adjustments. This indicates that many people have encountered this problem and have resolved it either by adjusting the DCS or increasing the rev. The car's behavior is not consistent and predictable, as it works in some conditions but not in others. Increasing the rev seems to resolve the issue, but the reason behind it remains unclear. It could be a software problem or, as you have suggested, a sensor issue. In this case, if the ABS sensor is the culprit, a red light should appear.t
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| 2nd Feb 2023 10:35 pm |
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Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
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Last edited by Flatlander on 21st Feb 2023 10:22 pm. Edited 1 time in total
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| 2nd Feb 2023 10:43 pm |
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ericsddfdd
Member Since: 28 Jan 2023
Location: stockholm
Posts: 8
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ok thanks in my case the rear left wheel did not spin which means the ABS sensor send the wrong information on that wheel, do you have any suggestion on how I can verify this thanks
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| 2nd Feb 2023 11:02 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8230
 
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Fit a new sensor or swap to the other side and see what happens. It can when others can't,
It will when others won't,
It goes where others don't.
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| 3rd Feb 2023 6:02 am |
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