Where is the wheel speed sensor tone ring?
The wheel speed sensor tone ring is built into the wheel bearing assembly, unlike other wheel speed sensor setups where the tone ring is on the outside of the outer CV joint housing, axle or hub. On the later applications, the WSS tone ring is exposed and very vulnerable to corrosion from road salt and road splash.
Why are wheel speed sensors inside hub assembly?
When engineers came up with the idea of putting the wheel speed sensor (WSS) and tone ring inside a sealed wheel bearing hub assembly, it seemed like a great idea. The sealed environment would help protect the sensor and make it less vulnerable to damage or contamination from the outside world.
Where is the wheel speed sensor on a Mercedes Benz?
The wheel speed sensor is built into the wheel bearing hub assembly. A metal “tone ring” with a predetermined number of teeth sits between the inner and outer bearings. A Hall Effect sensor plugs into a carefully machined hole in the forging, locating it just above the tone ring.As the vehicle’s wheelturns, the tone ring teeth pass by the sensor.
When do you need to replace a wheel bearing hub?
But, if the tone ring is corroded or damaged, it must be replaced. In the case of sealed hub assemblies with the WSS and tone ring inside, the hub provides protection against external corrosion — or at least that’s the goal. But nothing is perfect, and when moisture seeps into the hub, it corrodes the tone ring.
The wheel speed sensor tone ring is built into the wheel bearing assembly, unlike other wheel speed sensor setups where the tone ring is on the outside of the outer CV joint housing, axle or hub. On later applications, the WSS tone ring is exposed and very vulnerable to corrosion from road salt and road splash.
When engineers came up with the idea of putting the wheel speed sensor (WSS) and tone ring inside a sealed wheel bearing hub assembly, it seemed like a great idea. The sealed environment would help protect the sensor and make it less vulnerable to damage or contamination from the outside world.
Why is my ABS wheel speed sensor not working?
Any distorted signals indicate a problem with the tone wheel and/or sensor. Sealed hubs with integral wheel speed sensors and tone rings have become more common. They are designed to keep out the elements, but that is not always the case where they use lots of road salt in the winter.
The wheel speed sensor is built into the wheel bearing hub assembly. A metal “tone ring” with a predetermined number of teeth sits between the inner and outer bearings. A Hall Effect sensor plugs into a carefully machined hole in the forging, locating it just above the tone ring.As the vehicle’s wheelturns, the tone ring teeth pass by the sensor.