Rick's Free Auto Repair Advice

Posts Tagged: tone ring

Tone ring

What is a tone ring? A tone ring, also called a reluctor ring, is a notched or toothed ring that’s used in conjunction with a sensor to determine the number of revolutions or speed of revolutions. Where are tone rings used? A tone ring can be used in an engine to help the computer determine the exact location of the crankshaft and camshaft. In those cases, the tone ring will have a timing notch that’s used to indicate that the shaft has completed a full revolution.     Tone rings … Read More

Toyota ABS goes off with no snow or ice

Fix Toyota ABS that goes off with no snow or ice If your ABS system activates while slowing down, but there’s not snow or ice on the road, you may think you have a bad wheel speed sensor. You might. But you should first examine the toothed “tone” ring for chips, cracks, scratches, and even rust buildup. All vehicles using a tone ring can be sensitive to those kinds of ABS problems. But it seems Toyotas are extra sensitive. As the tone ring turns, each tooth induces or interrupts (depending … Read More


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