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Originally Posted by deliriousga
When you take the wheel off, there is a sensor for the ABS that plugs into the top of the steering knuckle. It is held in with one screw. The sensor goes through the knuckle with the bottom exposed just above the teeth on the axel. The sensor uses a magnet to sense those teeth moving past it. Since brake pads are "semi-metalic", some of the brake dust collects on the magnetic end of the sensor. Over time it can cover it with dust so the magnet in the sensor feels the dust sitting still and can't feel the teeth moving through that dust.
Unscrew the sensor and twist it lightly to slide it out. Be careful not to twist it too hard because you can break the sensor (I had a mechanic do this once and found out when the brakes let go.  ) When you put it back in, put some anti-sieze on the sides of the sensor, but make sure you don't get it on the end where the magnetic feeler is. |
this may be asking a lot but does anyone have a picture that points to this sensor, or shows the general area? I'm looking at taking off the wheel today.