High Capacity Actively Controlled Steering or often referred to as ‘HICAS’ is a rear wheel steering system found on Nissan cars. This system is used on Nissan cars on the model of 1985, but was not ready in time for production. And in 1986 a new system was introduced to the public at large. The system was later adapted to work on many models in the Nissan range, beginning with the Passage GT. Unlike other steering systems, HICAS installed to improve the handling not only as a parking aid.

The initial version of the system uses hydraulic power to drive the rear wheels. Later versions of the update HICAS called Super HICAS used electric actuator for rear steering rack. One of Nissan’s cars are using this system is the Nissan 240SX. Unlike Ornamental that control system with speed sensor, Super HICAS using a separate computer to control the system.

The following schematic illustrates the 1994 Diagram:

1994 Nissan 240SX Super HICAS System Diagram



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