Well, locking it up either means it doesn't have it, or it isn't working!
If you look at the hub behind the brake disk, there would be a kinda toothed disc for the sensor if it has it.
Jon from Wiltshire - UK Mk1 1.6 Classic Red-ish
Mods and Gadgets for your Five!Fault Code Readers, Warning Light Mods and More...Check out:
http://www.binarypunk.co.ukWin binarypunk products! See my home page for details.Popup Wink Mod - Coming Soon!:
http://youtu.be/xAquD1rJgYY