Replaced NS Front Wheel bearing, Now ABS problems.

[Motas88]

Hi all,

Replaced my near side front wheel bearing on Saturday and now find the ABS keeps kicking in intermittently.
The knuckle and bottom of the shock was quite badly corroded but cleaned them up as best as, plus gave the sensor a small spray with WD-40 and wipe. ABS ring had some surface corrosion but nothing to serious as it’s only 2 years old.

Thing that’s puzzling me is when it kicks in I get no warning lights, like you do when the traction control kicks in and have no ABS light on dash so no code. Is this Normal?

Many thanks

Regards

Tom

[amazondean]

It's not normal and you do have a problem. Maybe you disturbed the wiring when you unplugged it at the hub. If the ring is not too corroded that shouldn't be a problem. My bet is either where the wiring plugs in at the hub or it's the sensor itself and can be a bit of a pain to remove if it has corrosion holding it in place!

[Cookeh]

If you don't get the driveshaft fully seated, or the axle nut fully torqued, the tone ring won't be in quite the right place. This will cause intermittent abs light illumination. Read the ABS codes, will help narrow it down.

[Motas88]

Thanks for the quick reply’s. Sorry poor wording, I know the problem itself is not normal but I don’t have an ABS warning light therefore I’m puzzled. If I got some locktite or grease on the ring could this cause the issue without throwing a code?

Thanks I’ll maybe recheck the drive shaft bolt is torqued correctly!

[Motas88]

Originally Posted by amazondean

It's not normal and you do have a problem. Maybe you disturbed the wiring when you unplugged it at the hub. If the ring is not too corroded that shouldn't be a problem. My bet is either where the wiring plugs in at the hub or it's the sensor itself and can be a bit of a pain to remove if it has corrosion holding it in place!

Just to be clear, didn’t unplug anything. Just removed the 10mm bolt holding the sensor in place and moved it out of the way. I did spray the area with WD-40 and clean it up with a wire brush could that cause the issue?

[isettaman]

My suggestion would be to remove the sensor and give it a good clean with brake cleaner, then soak a small firm bristle brush with the cleaner and push it down the sensor hole so it contacts the ring and spin the wheel. This will give it a good clean. This worked on my 850, not sure what your model is.
However, if the ABS is kicking in intermittently with no warning light showing, fault code reading is the way to go.
Dave

[Luxobarge]

Originally Posted by isettaman

However, if the ABS is kicking in intermittently with no warning light showing, fault code reading is the way to go.
Dave

Sorry, I disagree. If the ABS is kicking in intermittently, then the ECU thinks that the wheel is skidding, and is doing what it's supposed to do, and will not detect an error. Therefore there will be no codes, so fault code reading will not help. If the ABS light is not on then there won't be any codes to read.

This condition can be generated by a poor, broken or intermittent signal from the ABS sensor, as would happen if the wheel really was skidding. This can be caused by the reluctor ring (favourite) being out of position, cracked or corroded, or by the ABS sensor itself - sometimes rust has got under the mounting bracket and pushed it too far from the reluctor ring, thus producing a poor signal, or of course the sensor itself could be faulty but IMHO this is the least likely cause.