ABS Fault Light

[mainexile]

2006 GMC Canyon SLE Crew Cab, 4WD.  Right front brake was sticking causing premature pad and rotor wear with low, spongy pedal.  No ABS problems noticed.  Disassembled the brake and hub, replaced pads and rotors, test drove, and all seemed fine.  After 20 minutes of driving, ABS and Brake warning lights illuminated, and right front brake started dragging and burning/smoking.  Replaced caliper (piston and caliper pin sticking), bled brake, and tested.  ABS and Brake warning lights went out, and all seemed fine.  20 minuted later, after backing up from a post office stop, ABS light re-illuminated (no Brake warning light).  Haven't started diagnosing yet (started raining and didn't feel like getting wet).  I have a new rotor and pads for the left front, but I want to determine which wheel is tripping the ABS Fault light.  Any suggestions on how to proceed from here?  Thanks in advance.

[Jsdirt]

If the brake isn't still hanging up, I'm going to say the heat from the prior incidents cooked the bearing, or the sensor, or both.

 

Hook up a scan too and go for a drive - set it up so you can view all 4 wheel speed PIDs. The right front is probably not reading, or reading incorrectly.

[mainexile]

On 11/3/2017 at 6:06 PM, Jsdirt said:

If the brake isn't still hanging up, I'm going to say the heat from the prior incidents cooked the bearing, or the sensor, or both.

 

Hook up a scan too and go for a drive - set it up so you can view all 4 wheel speed PIDs. The right front is probably not reading, or reading incorrectly.

Thanks for your response.  I, too, suspect bearing/hub/ABS sensor intermittent failure.  I've ordered new hub assemblies and will replace both this week along with left front caliper, rotor and pads (they're due - 160K on the clock).  Unfortunately, my Actron scan tool doesn't read CXXXX codes, so I'm gonna replace everything except brake lines and ABS control module.  Winter road salt is a be-atch.  Nice El Camino BTW.

[Jsdirt]

Thanks man!

 

I was an idiot and went and sold the thing back in '11. That pic is actually from arriving at the new owner's shop down in SC. I miss that car/truck every single day. 

 

Good call on replacing both, plus calipers/pads - best way to go. That way old calipers won't ruin your new parts! Wish some of my customers had your insight  ...