it is the steering angle sensor, and it is to do with the 4wd and hicas systems. it is located behind the steering wheel and measures the angle that you have the steering wheel turned in degrees..
yes, it would put the hicas into default, ie heavy steering and no hicas. Also the angle needs to be set properly, its no good if the system thinks that 0degrees is really 100degrees right hand down.
hope that helps.
A forum community dedicated to Nissan Skyline GTR owners and enthusiasts. Come join the discussion about performance, mods, troubleshooting, body kits, classifieds, maintenance, and more!