ok,
so i recently replaced my rear rotors and pads and the drivers side wheel bearings and outer half shaft u joint.

Now i am having a brake problem. when applying the brakes they are nice and firm, breaking is great until the car is almost stopped.

the ABS seems to kick in. the pedal vibrates and buzzes, and i can hear the abs noise.

I unplugged the abs fuse and the problem stopped... so i am sure it is abs related.

I am getting no warning lights.

i am thinking it could be the wheel speed sensor for the wheel i did the bearings on, since i had the abs ring off, etc..

i would think that this would throw a code.

Is there any way to check this to see if it is the issue?

where would i start troubleshooting the problem?

 

You getting a false asb signal check your sensor rings abs sensor gap
I have run into this type of problem on GM and Ford

Mike

 

You may have a c- code, which can not be read with most generic readers.

 

The way I would diagnose is to check for DTCs as RJ237 has stated.
If no DTCs then you could use 'datalogger' in WDS, IDS etc. to read all the wheel speed sensors to see the live data. A speed sensor that indicates a different speed from the rest will activate the system.

Could be a faulty/damaged sensor or a damaged or loose reluctor sensor ring.

bob gauff

 

thx.

will start with the ring/sensor.

if there was a c-code would i not get a light?

 

DTC's do not necessarily cause a warning, depends on how serious the fault.

 

FWIW I had a problem with a loose reluctor ring after a wheel bearing replacement. The ABS behaved a little weird....kicking in only on low speed turns!

Removing the wheel speed sensor for a look-see I discovered that I was able to easily wiggle the reluctor with a screwdriver.

Dropped the hub carrier down, cleaned area, reinstalled reluctor a Loctite added. No problems since.

Can't really explain why it happened but apparently the interference fit of the ring isn't very tight to begin with. (?)

Cheers
DD

 

thanks for the input.
i am thinking it was the ring.
It seated, but did not seem like it was on very tight.

I assumed that when the hub center bolt was applied it would pull the ring up against the small flare on the yoke of the half shaft and hold the ring tight... i guess not.