Stuck left rear caliper even after replacement

2BEARS

MEMBER
2006 KIA SPORTAGE
2.7L
6 CYL
4WD
AUTOMATIC
200,000 MILES

Stuck left caliper appeared luckily in driveway!
Cal-piston seal pushed partially out. Replaced rear calipers as pair. Replaced short left rear rubber line section. Bled brakes. Test=sticking!
Purchased Foxwell OBDII.
Scanner tested all ABS module valves/solenoids tested okay. Performed ABS auto bleed. Did not bleed.
Brakes tested=still sticking! Looking like ABS module is bad?
FMRB!

3 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Yes. This could be an ABS issue but we need to confirm this by unplugging the ABS module and then retesting the vehicle to find out if the tire releases. Clearly you are going to have codes but they will clear once you plug it back in and clear them.

If the rear brake releases then we either have an ABS module issue or the hydraulic control unit is applying that rear caliper.

https://www.2carpros.com/articles/how-to-replace-a-abs-controller

Below is the process from the module that will show where to unplug it.

Please let us know what you find with this and we can go from there. Thanks

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Wednesday, June 9th, 2021 AT 4:31 PM

2BEARS

MEMBER
2 POSTS

Update: stuck caliper left rear on the car listed above that has always been garaged.
After cheap aftermarket caliper replacement fiasco, see pic.
First, I bought an obdii scanner capable of active tests and special functions ie-ABS auto bleed.(Foxwell 630 nt pro $145.00! Amazon). Second, I learned to use scanner. Third, I tried auto-bleed=no change. I activated the left rear "outlet valve"- the wheel released. When trying brakes later/afterwards the valve stuck again!
I had to remove battery 12 VDC to clear systems to even get scanner to once again activate the sticking valve.
I learned there are eight valves in the hydraulic assembly. I'm now in process of removing the ABS assembly so I can remove and replace the hydraulic block
only, thereby keeping my current programming.
And functioning pump

Shiny side up
Everybody !

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