Hey Subie!
To get to the Steering Wheel Sensor, you have to take the steering wheel off and there should be a circular disk or plate, that is the sensor.
Unplug it and give it a clean (BUT before taking it out, mark a texture on it so you know you will place it back in the correct spot.
To clean it, my mechanic used an air gun and I think he sprayed some WD 40, gave it a good flush then placed it back in the correct spot. It gets rid of the dust and dirt.
Before I cleaned the sensor, my HICAS light would come on as soon as you start to turn left, like half a turn. After cleaing it it did not come on till ONE FULL LOCK to the LEFT.
Thats when he plugged in the Diagnostics computer. It can pick up all the sensors the car has, so we could isolate where the problem was. The mechanic should have the diagnositcs computer, unless you got one which probley set you back $6000 LOL!
As I said it was the rods that need alignment / adjustment.
Anyway I got 2 mechanics. The one who fixed my HICAS problem was a family friend of mine, Jansen who works at TGS Performance
18 Bricker St
Cheltenham, Victoria
3192
Melways Reference
Page 78 - B10
Phone: (03) 9555-0699
and my other mechanic is Shane at Le Mans Automotive
15 Websters Rd
Templestowe VIC 3106
Phone: (03) 9846 2761
If you are near these areas I suggest you take it to them, unless your HICAS is fixed... Or take it back to your mechanic...
I was not there when Jansen fix the problem so I didnt get to see exactly how he fixed it but this is pretty much what I was told.
But let me know how you go and I can ask for you and get some idea.
Cool!