I know this has probaly been discussed before but the hicas light stays on in my skyline most of the time, only time its of is when its real hot weather. When its hot the steering goes light aswell so im guessing the power steering pump is not working right, or could the oil be dirty ?? its a 1993 r33 so its electronic hicas, is the power steering pump the same as a non hicas engine ?, any idea help please ???