ABS light

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  #1  
Old 08-14-20, 09:04 AM
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ABS light

On the way back from town the ABS light came on. I checked the brake pedal [it was good] and within a 1/4 mile the light went off as mysteriously as it came on. Never had that happen before on any vehicle. Any ideas as to why?
2010 jeep jk, 80k miles.
 
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  #2  
Old 08-14-20, 09:30 AM
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It is actually a common occurrence, the WSS (wheel speed sensor) on one of the wheels had a mis-signal, the wheel slipped, or a electrical hickup which the ABS module detected as a wheel slip occurrence and set the light.



 
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Old 08-14-20, 09:32 AM
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Thanks, we've had multiple vehicles with ABS but this is the first time I've had the light come on.
 
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Old 08-21-20, 07:11 AM
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I might have found the cause of the ABS light coming on. One of the pads was deteriorating with a portion of it no longer attached to the pad backer. All the pads were worn down more than halfway. Hopefully replacing the rear pads will be the fix. Sure don't understand why my jeep is so hard on rear pads, this will make the 3rd set.
 
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Old 08-21-20, 08:45 AM
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Pads should not have anything to do with the ABS light coming on, the ABS system uses electrical impulses from the wheel bearing so the two are not directly related.

Are the pads OEM or aftermarket?
 
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Old 08-21-20, 09:21 AM
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They are from AutoZone [lifetime] I would have thought they would have held up as good or better than the factory pads but they wore out about the same.

So broken pads floating around on the rotor wouldn't affect the ABS?
 
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Old 08-21-20, 10:56 AM
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I used to be a brake engineer for one of the big three, the amount of work that goes into validating brake systems is increadable, noise, vibration, wear, dust. Aftermarket parts are generic, they use the same materials for all makes, just formed to different shapes.

Personally I always go OEM, I hate doing brakes and never want to do anything twice!

And no, worn or broken pads should have nothing to do with setting an ABS light!
 
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Old 08-21-20, 12:51 PM
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Other than my jeep I've always gotten good service out of Duralast brakes. For me the lifetime warranty along with lower price than OEM makes it no brainer. This jeep is the only vehicle I've ever had that used up rear brakes 3xs faster than the front.
 
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Old 08-21-20, 04:59 PM
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Replacing brake pads is a dirty, yet relatively easy DIY job if you have the tools. You purchased a lifetime replacement warranty with the pads so I think you have the tools. No need getting gray over the rears wearing out faster than the front unless the vehicle isn't stopping properly. Just replace the pads with the free replacement. Good wrenching.
 
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Old 08-21-20, 05:29 PM
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If the light comes on again that means you have a defective ABS sensor on one (or more) wheels. Replacement is the only real solution.
 
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Old 08-21-20, 06:01 PM
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Not that easy, failure could be the sensor, the wiring, the connector, or even the encoder inside the bearing, not a simple solution.

Some items are cheap connector/wiring/sensor, others are expensive, bearing.

And that is assuming it's not the module but that is a usually a robust part!
 
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Old 08-22-20, 12:37 AM
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could start checking abs codes really could be a lot of things besides a speed sensor.
 
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Old 08-22-20, 04:13 AM
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Not that easy, failure could be the sensor, the wiring, the connector, or even the encoder inside the bearing, not a simple solution.
True, but at the sensor is where wear and tear take place is the most likely the weakest point. Before pulling all the wires and modules and connectors the simple "test" is check a sensor.
 
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Old 08-22-20, 04:37 AM
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I'm just clarifying, have assisted with diagnosing hundreds of these in the old quality job!

Modern cars use a magnetic inductor ring, a disc with N & S poles electrically installed, the sensor picks up the signal from the rotating ring which creates a magnetic signal.

There is nothing to wear since nothing touches.

If the sensor goes bad it's due to an impact or the wire gets broken.
 
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Old 08-22-20, 04:44 AM
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If the sensor goes bad it's due to an impact or the wire gets broken.
My point exactly. And where is the most likely place for this to happen? At the wheel, at then sensor or it's actual connection.
 
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Old 08-22-20, 01:03 PM
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Post 1 states ABS light is off. If the ABS light is off, no ABS component needs to be replaced as I see it. I did state replacing the brake pads was relatively easy, nothing about ABS components.
 
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Old 08-23-20, 07:12 AM
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There are so many codes abs system have to scan history and current get idea where to look for problem. I use autozone lifetime semi metallic pads last a while haven't paid for pads for 10 years. I also use duralast gold rotors three year warranty even against rust the cheaper cast iron ones rust out with road salt. Ac Delco has one advantage plus but more money but only one year warranty.
 
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