ABS applying to one wheel at full steering lock

[nik95]

Hi guys, as the title suggests - when I turn the wheel either side to full lock, there is a dragging sound coming from the front rightwheel. This is, I'm certain, from the ABS squeezing and releasing the brakes. Also verified with my scan tool as it pops with 2 codes - DTC0C1223 - ABS malfunction ; DTC0C1241 low/high Battery voltage.

This problem came up after I had a garage change the front shock absorbers. He did say that the wheel speed sensor pulled off from the wire (on the same wheel it's having problems with), but he managed to reattach it.

I had a quick look at it with the wheel on and the cable and how it connects to the sensor all seemed fine.

So, my question is before I start messing with it, what should I be looking for? I've got a multimeter (and know how to use it) so is there a way to check the sensor with it? What kind of test should I do on the cable besides looking for a short between the wires? Think it was just two wires, so what kind of signals go through them - 12V and ground, or ground and the sensor produces it's own voltage that feeds into the ABS unit (which makes more sense to me)?

Any help is appreciated!

[Upex]

My old gal does similar but it's not abs, its just the angle of tyres and road on full lock, they stutter/judder.

 

If it is abs as per codes (ie they only pop when steered full after clearing) then I'd bet its that sensor needs replaced. You cannot usually withdraw wires that aren't meant to be removed and put them back in with reliable contacts.

Don't know what to test for, but try continuity, I'd expect there to be an on off type single, the speed of which converts to road speed. If no good, use a good wheel to see what's going on and then replicate?

Or just change the sensor, I'd bet those wires are not in 'properly' even if test ok under some conditions, and get garage to pay given they fussed up to breaking it.