IainB
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| posted on 20/3/07 at 09:41 PM |
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ABS playing up
Having some problems with my folk's '01 Renault Kangoo van...
Occasionally when brakes are applied lightly at low speed the ABS starts to 'rumble' through the pedal. The rumbling is less severe than
normal which makes me think only one wheel is affected? I guess there is some kind of sensor mounted to the hub - could this be damaged or even just
needing cleaned up?
Any advise much appreciated,
Iain
http://s43.photobucket.com/albums/e365/IainB1986/
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iceman26
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| posted on 20/3/07 at 09:43 PM |
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check for cracks in abs rings
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tks
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| posted on 20/3/07 at 10:23 PM |
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mhhh
i would suspect a bad connection
of the sensor being the fault.
maybe the sensor is loose or something..
When it aplies the ruble its because it thinks one wheel is stalled/fully braked
sow it needs to detect no rpm..
because it are inductive sensors the hardly cant know if its the wheel who isn't turning or the sensor wich disconnects / connects..
Tks
The above comments are always meant to be from the above persons perspective.
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britishtrident
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| posted on 21/3/07 at 07:27 AM |
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ABS faults are usually wiring/connector plug faults, sensor faults or reluctor ring faults -- check the wiring in the wheel arch first. On recent car
reluctor ring problems have become more common.
Also based on our the description are you sure it isn't a warped disc.
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MG David
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| posted on 21/3/07 at 08:44 AM |
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My wife had this problem. It only happened at dead slow speed. It turned out to me the reluctor ring. That is the ring of blips on the drive shaft
that the sensor points at. The ring had cracked in one of the gaps and upset the signal.
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Ketchup
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| posted on 21/3/07 at 01:06 PM |
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will thrid the reluctor ring, either cracked as previously stated by mg david, or i have seen lumps of road tar in one of the gaps cause the same
problem. Dead common for cracks on primeras reluctors, and that creats the exact symptoms you describe
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IainB
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| posted on 21/3/07 at 03:24 PM |
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Many thanks folks, I will check my rings (oo er) tomorrow. It only does it at very low speed as mentioned and you can almost feel it passing a bad
part of the sensor ring each times the wheel turns. Thanks again!
Regards,
Iain
http://s43.photobucket.com/albums/e365/IainB1986/
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smart51
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| posted on 21/3/07 at 04:25 PM |
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The sensors signal strength rises with wheels speed. Theres almost no signal at 1 or 2 MPH. Problems at low speed can be related to sensor / reluctor
wheel gap. If the gap is bigger, there is no signal to a higher speed.
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IainB
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| posted on 22/3/07 at 06:09 PM |
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My God you guys are good! Had a look today and discovered one of the rings has a large crack between the teeth. Shouldn't be too difficult to
fix...
Thanks again for your help,
Iain
http://s43.photobucket.com/albums/e365/IainB1986/
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