Service advancetrac

[zstanny]

Ok folks. Here's the update.

"Found DTC FOR RF abs wheel bearing tone ring. Inspected tone ring and found a small piece of metal on the rf wheel bearing magnet. Removed metal piece from bearing. Cleared DTCs test drove concern no longer present. Repair complete."

The pic is crummy bc it's a screenshot from a video they sent me. The rotation here is clockwise, so looking at that little shard hanging down, each time it made a revolution, it slapped that left edge of the U (kind of where it's sitting as pictured).

Not quite what I was expecting, so I thought worth sharing.

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[BigR4444]

So it was just a random piece of metal that was interfering with the tone ring? Lol, hilarious.

*The wheel bearing has a magnet on it? Anyone care to enlighten me as to why that's a thing?

 

[SheepDog]

So it was just a random piece of metal that was interfering with the tone ring? Lol, hilarious.

*The wheel bearing has a magnet on it? Anyone care to enlighten me as to why that's a thing?

The magnet is used to create a pulse in the sensor. There are basically high and low spots in the tone ring and the magnet pulses as the bearing/hub spins based on the strength of the pull or magnetism. this strong-weak-strong effect is converted into an electrical signal that the body control module (and others) can then see as rotation. A lot of crankshaft position sensors also work this way.

 

[zstanny]

The magnet is used to create a pulse in the sensor. There are basically high and low spots in the tone ring and the magnet pulses based on the strength of the pull or magnetism. this strong-weak-strong effect is converted into an electrical signal that the body control module (and others) can then see as rotation. A lot of crankshaft position sensors also work this way.

That's the best explanation I was able to find. Thanks.

@BigR4444 was also curious myself. The service advisor was like yeah man...IDK.

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