ABS Warning Light

[Stripey Green Bean]

I have an intermittent problem with my toyota avensis 2.2L [2231] diesel estate manual 2006. If I am travelling on rough roads or steep downhills, sometimes on a roundabout or a hump back bridge, the fault light comes on to indicate that i have a problem with my ABS and Stability Control. When i have tested the ABS with a bit of sharp braking it is working fine. When the car has been driven for a few miles on the level, i turn the engine off and restart and the warning light turns off.

Having read a number of posts on this subject it seems likely that the fault is with the Yaw sensor. It will cost me £60 to buy a reconditioned Yaw sensor, which I can return to the scrappy, or £45 to get a garage to run a diagnostic check. I figure that the the best thing to do woudl be to replace the Yaw sensor. Unfortunately i cannot find it. The diagrams that i can find on the net are unclear. Is it under the centre console? - i have partially removed this and cannot see it. or is it under the pasanger seat? If it is under the passenger seat, how do I remove the seat and does anyone have a picture to show me where it is locate? looking on the net it must be about the size of my fist (i am guessing). I could do with getting it fixed quickly as i have an MOT coming up very soon.

[battleaxe]

check brake light switch first, about £14.00