Just read this in a check list document in another post...

 

An arrythmic loud metallic rapping sound that is directly identifiable with wheel rotation indicates a wheel bearing on it’s way out. If the wheel goes out of round on its bearings, it will hit the ABS sensor, immediately garbage it (2 times for me) and that sensor is a $900 part in itself.

 

I've just had to replace my nearside rear wheel bearing. If I'd damaged an ABS sensor would I know about it from warning lights? Would it just be obvious?

 

Cheers

 

David

If one of the sensors isnt working the ABS light comes on after about 50 yards of driving.

 

When I replaced one of mine I did a few test. I had it unpulgged from the wireing and as soon as I started to roll forward the ABS light came on.

I also pulled the sensor out a little so it was too far to get a signal from the wheel. After about 30-50 yards the light came on.

When the light came on, I think when you stop the light starts flashing to signal which wheel the error came from.

 

Also if there is a big difference between the wheel speeds the light comes one. For example, when stuck in snow a few years ago, the rear wheels where just spinning round and the fronts where not. Signals are coming from the rear of doing 20-30mph while virtually nothing from the fronts. After a while the ABS suspects that there is an error because of the different speeds from different wheels. I think it disables the ABS too when that happens.

 

People may have noticed after ther RR, if the engine wasnt turned off, the ABS light would be on because of the difference in wheel speeds.

 

I replaced my ABS sensor after installing my Traction Control and kept getting an intermittent signal from the front passenger sensor. According to the book, it said was due to a faulty sensor. I replaced it with one from Andy and it was the same. That is when I did the tests. I basically found out if there is no warning light the sensors are working correctly.

Why did you change you sensor?

 

Stuart

For example, when stuck in snow a few years ago, the rear wheels where just spinning round and the fronts where not. Signals are coming from the rear of doing 20-30mph while virtually nothing from the fronts. After a while the ABS suspects that there is an error because of the different speeds from different wheels. I think it disables the ABS too when that happens.

 

Hey, nice feature. Slippy conditions switch the ABS off. :rofl:

 

Mind you, slippy conditions seemed to switch most people's brains off yesterday...