HICAS. Super HICAS. Four Wheel steering. 4WS. People say all kinds of things. The R32 GT-R technically has Super HICAS on it. Its a hydraulic mechanical four wheel steering system. The OEM power steering pump has 2 stages. One for the front steering rack, and a rear stage for the rear steering rack.
Not a lot of people like the system. It can fault. It can leak. It sometimes does odd things. When the rear wheels steer it can be a bit unsettling. The system is very similar to the 300ZX system. Also it can be found on a number of other Nissans.
The original purpose was to help with handling, and even low speed maneuvering. At higher speeds the rear wheels turn in the direction of the front wheels, making things like lane changes a little easier. At low speeds they turn counter, allowing the vehicle to have a tighter turning radius.
You can see in the above diagram, the rear wheels on turn in, go counter the front wheels. This helps to rotate the rear end of the car. They then turn in the direction of the front wheels to try and keep everything in line.
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Self Diagnostic Procedure and HICAS trouble codes
|R32 GT-R Super Hicas specifications|
|OEM R32 GT-R Steering Wheel|
|Notice the square cut outs for the HICAS sensor. There are two different OEM center points. Know what you have|
|R32 GT-R Power Steering pump. Front side is for front rack. Rear side is for HICAS rack|
|Rear steering rack. HICAS rack. Rear wheel steering|
|R32 GT-R Super HICAS electrical system diagram|
How to Bleed Super Hicas without a Consult.
|Aftermarket steering wheel with HICAS boss|
- R34 Super Hicas Electrical and System Diagram
- HICAS self diagnostic procedure and trouble codes
- HICAS Removal - Skylife