New Wheel Bearing but ABS and Traction lights on... - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 6 (permalink) Old 01-01-2014, 05:07 PM Thread Starter
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New Wheel Bearing but ABS and Traction lights on...

I know that this is going to seem long, but please bear with me I have been at this problem for a month now.
Last February I had my drivers side wheel bearing replaced. To replace the bearing that had to take of the ABS speed sensor and install a new one of those also. They could not get the ABS/traction and DCS light to turn off. They took the wheel bearing out and made sure it was in the correct way. It was. I have had it scanned multiple times. The sensor is reading the speed of the tire. A mechanic told me when he scanned the car it was missing signals every once and a while. I took my car to get air put in the tires. When I began driving I noticed the lights were out, but they came back on once I hit about 25 to 30 mph. Any thoughts would be greatly appreciated because this seems to be a never ending problem.
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post #2 of 6 (permalink) Old 01-01-2014, 09:26 PM
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Get under there and check that the sensor is installed properly. Compare it to the other side. It is possible to bolt them in without having the pointed in the proper orientation (don't ask how I know).

If that checks out, get the wheels in the air, disconnect the abs sensor and measure the resistance with your dvom as you spin the wheel. You are looking for significant differences from one wheel to the next. If one is low it could be misaligned, too far from the abs ring or just faulty.

Good luck,
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post #3 of 6 (permalink) Old 01-01-2014, 11:56 PM
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^^ Good insight! There is a reason. ONE is not like the others! look for Gaps between sensor and counter ring. One with more/less gap is suspect! bad or dirty connections matter too. And I have to say this, NEW is not always 100%. This is a very low level signal, many variables could impact it. Do you have the original sensor? Can you put it back? Is left and right interchangeable? If so. swap them!

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post #4 of 6 (permalink) Old 01-02-2014, 10:47 AM Thread Starter
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ok this is going to sound really stupid, is the abs speed sensor located on the outside of hub assembly and rotors. Or do I need to take the caliper off to get to it. I can't find anything on the internet.
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post #5 of 6 (permalink) Old 01-02-2014, 12:09 PM
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So in one thread we have a gen2 and Im not sure what year your car is??? It on the spindle.

From an 06 1st Gen. V6 w/ATX.
Notice the counter ring on the axle going into the spindle/hub area. This it the front. Where is your issue?

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post #6 of 6 (permalink) Old 01-02-2014, 12:10 PM
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Quote:
Originally Posted by cookdi View Post
ok this is going to sound really stupid, is the abs speed sensor located on the outside of hub assembly and rotors. Or do I need to take the caliper off to get to it. I can't find anything on the internet.
I have a couple pics that may help but not one of the sensor. The sensor is located behind the brake rotor and splash shield. It is round and mounted very close to the ABS ring. The ABS ring is on the CV shaft.

Here is the ABS ring with the caliper & rotor removed (passengers side):




Here is the brake line (stainless steel) and the ABS sensor wire (black) (drivers side):



Here the black ABS wire is wrapping around the front of the knuckle (drivers side):


Good luck!
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Last edited by CanyonRider; 01-02-2014 at 12:30 PM.
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