HICAS stands for Hich Capacity Activly-Controlled Suspension.
What it actually means, is that the stagea is fitted with 4-wheel steering.
The Japanese became interested in the idea of 4-wheel steering, and continued to experiment with it. Nissan's Super-HICAS system is an electronically controlled electrohydraulic system, as opposed to the simpler mechanical system. It was felt that the more complex system offered a better result than the simpler mechanical linkage. In a mechanical system, the rear wheels turn with the front wheels at the same rate. Using HICAS, however, an electronic control unit takes data from the steering wheel, and front wheels, and together with the car's current speed and other parameters, decides on the angle to which the rear wheels should turn. The rear wheels are then turned via a hydraulic cylinder. All of this happens instantly, and the system will constantly reposition the rear wheels for optimum effect, steering them either in the same, or the opposite direction to the front wheels depending on the situation. The HICAS system is superior to the mechanical system in that I provides faster, more reliable response, improves stability on curves, and eliminates abnormal car behavior during rapid direction changes such as those encountered in emergency situations. The HICAS system contains an emergency fail safe which locks the rear wheels in the standard fore-and-aft position if anything goes wrong, effectively turning the car back into a two-wheel steering system.
Let's go halvies in a RS260 and i'll show ya!!!!