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post #1 of 7 (permalink) Old 06-14-2017, 08:42 AM Thread Starter
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ABS Failure

So I'm out for a nice days ride when about halfway through the day the ABS light comes on and stays lit.
When I got home I read the DTC: C1023 Rear wheel speed sensor always equals zero...
I checked the wiring from the rear axle along the swing arm up into the ABS control module, all good visually. I reset the DTC and went for a quick ride. In short order the light was on and solid again.
Same DTC had been thrown. I have ordered a replacement sensor and am waiting for it to arrive.

Any thoughts on why an ABS sensor would fail without external damage?
Thanks...


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post #2 of 7 (permalink) Old 06-14-2017, 09:32 AM
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It's electronic, so it can fail.

With that said, issues with the wiring and wheel bearings are more common than failed sensors.

And the service procedure is to replace the bearing and sensor as a set. But I think that's about there being no sure way to determine which is at fault.

If you VOM is sensitive enough, or has a Hz setting, you can just connect to the sensor and see if it generates a signal when the wheel turns. If it does, then you'll need to check the circuit/harness

I've only ever seen one bad wheel sensor, and it had a brand new tire on it. Who ever changed the tire probably let it bounce off the floor. But I have seen a few dead wheel bearings set that code.


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post #3 of 7 (permalink) Old 06-14-2017, 03:38 PM
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Related in another way, your ABS will also fail if you don't change the brake fluid. Yours definitely sounds bearing or sensor related, but don't forget to change the fluid every 2 years also.
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post #4 of 7 (permalink) Old 06-30-2017, 12:03 AM Thread Starter
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Update

I installed the new sensor but the fault persists. I am still waiting on the ABS bearing to arrive.
My gut tells me (along with Thermodyne), that will solve the problem. The existing tone ring assembly was an add on to a non-abs bearing supplied with the after market wheel when purchased. It's a cheap plastic spacer that surrounds a small metal ring that all gets sandwiched between the fork and the wheel.
It looks like it froze in place after a couple years on the bike and stopped rotating to induce a signal in the sensor. I'm pretty sure a dedicated one piece ABS bearing will do the trick. I'll keep you posted...


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post #5 of 7 (permalink) Old 06-30-2017, 07:39 AM
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Quote:
Originally Posted by chromedome View Post
I installed the new sensor but the fault persists. I am still waiting on the ABS bearing to arrive.
My gut tells me (along with Thermodyne), that will solve the problem. The existing tone ring assembly was an add on to a non-abs bearing supplied with the after market wheel when purchased. It's a cheap plastic spacer that surrounds a small metal ring that all gets sandwiched between the fork and the wheel.
It looks like it froze in place after a couple years on the bike and stopped rotating to induce a signal in the sensor. I'm pretty sure a dedicated one piece ABS bearing will do the trick. I'll keep you posted...
Do be careful when installing that bearing. It needs to be pushed in by the outer race. Don't hammer it, or push it by the center race.


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post #6 of 7 (permalink) Old 06-30-2017, 09:50 AM Thread Starter
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Quote:
Originally Posted by Thermodyne View Post
Do be careful when installing that bearing. It needs to be pushed in by the outer race. Don't hammer it, or push it by the center race.
Thanks, I have the JIMS tool with a 25mm press


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post #7 of 7 (permalink) Old 07-02-2017, 09:46 AM Thread Starter
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New bearings installed. Problem solved.
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