Home > Puma (Tdci) > ABS activating |
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andy63 Member Since: 30 Jun 2023 Location: north east Posts: 531 |
The 2.4 doesn't have the steering column sensor but does it have the yaw sensor.. That is also tied in with the whole stability control /traction control /abs set up and might be worth investigating.. If you haven't already done so..
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18th Jul 2023 6:47pm |
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Bluest Member Since: 23 Apr 2016 Location: Lancashire Posts: 4216 |
There’s no yaw sensor on a 2.4. 2007 110 TDCi Station Wagon XS
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18th Jul 2023 7:51pm |
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Johan_B Member Since: 20 Sep 2024 Location: Gothenburg Posts: 33 |
Hi!
I have very similar symptom on mine, although a bit less, only happens when I make a hard right into my street and also traverse a road bump in the turn. I do have some play in the rear wheel bearings so that could of course contribute but reading your story I realize you have checked all bearings and sensors so there must be something else. Thinking out loud here so please correct me where I go wrong. The ABS system must have an algorithm to determine when to intervene. I would guess it is specific to the car model it is mounted in. Could it be that LR has too tight tolerances on this algorithm? Leading to some cars having this problem in extreme steering wheel angles? Apart from wheel bearings, could the bushings in the rear also effect the performance? If the rear axle rotate just a bit too much as you take up speed, that could be translated to higher reading on one axle. Could play in the driveline effect? The system is expecting movement in the wheels but it doesn't show up due to excessive play in driveshaft to drive member coupling, in the differential etc. Maybe this could also be amplified as one go over a bump in the road? Where does the rear sensor read the pulses? Is it from the hub? |
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4th Dec 2024 8:48am |
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jbcollier Member Since: 29 Apr 2024 Location: Edmonton AB Posts: 108 |
I had a Disco 2 doing similar things only it was undriveable and I had to remove the fuse. I used the Lynx tool to diagnose that one sensor was “late” in starting up which triggered the system. I replaced all four sensors with ones with extra long cables to eliminate all the connections in the system. Fixed it right up.
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5th Dec 2024 12:37am |
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jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8051 |
Axles are meant to rotate at different speeds, it's unlikely to be bushes.
What are the main harness plug fitting like? Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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5th Dec 2024 7:20am |
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Johan_B Member Since: 20 Sep 2024 Location: Gothenburg Posts: 33 |
James, maybe you answered my question but just to clarify; If the axle casing rotate excessively due to worn bushes during acceleration, the sensors would too. At the same time the wheel rotate in the opposite direction. Thus one or two pulses could appear faster than they should, this could then be interpreted as loss of traction on the rear axle. Triggering the TC to intervene. At least in theory. I have no experience or knowledge of how much axle casing rotation actually happens so in practice this might never be an issue.
I don't want to cause confusion on the topic but I have a feeling that with our cars there is so much movement in suspension and slack in driveline that it can't entirely be ruled out as a cause. Especially as other avenues have been investigated and considering the cases where the problem happens. Slow driving, sharp turning and bumps in the road. |
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5th Dec 2024 10:36am |
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