i just checked my sensors one by one (disconnected them and checked the voltage)

As per Damos post

you are looking for around 0.2 volts at a wheel speed of 60 rpm.

I of course didnt know what the voltage was supposed to be however all i needed to know was that the sensor WAS giving a reading of some sort that varied with wheel speed (obviously increasing with wheel speed)

if i had know the pin outs i would have checked at the ECU end but it makes no odds really if just testing the sensor.

you want the Multimeter set to voltage and anything thats capable of reading around the range described in the pic above (0.2v)

My particular multimeter was set to 200mv - 2v but others may be different!

the sensors plugs below the rear bench on the 3dr (maybe others) and come through the chassis rail at the front IIRC.

i found one of mine wasnt earthing properly and just needed a clean up as well as the hub needing a quick going over with some sand paper when the sensor bolts in.