Abs engaging at low speed

[Mike003]

Hi everyone, this is my first topic. I realy hope to find help here guys.

I have a yaris sedan 2007. I recently start having trouble with the abs engaging at low speed.

I got 4 abs codes: 1241, 0200, 0205 and 0215.

On other topics some people thinks everything is related to the 1241.

I cleaned the abs sensor connector at each wheels and cleaned the positive pole of the battery where there was a lot of corrosion but i keep having the problem.

Here my questions :


1-Is it normal that i got 5,6 megaohms resistance at both front sensors and no voltage when i turn the hub?
2-How can i know wich hub i need to replace ?
3-Am i suppose to see the dented ring by the hole after pulling out the abs sensor?

Mickael