Hicas:/

[mexr]

heyas, this problem has been around for about a month now, sometimes its there for days but then the power steering comes back on occasions. Ive checked the power steering/auto fluid and its fine, the fuses have been changed recently and the problem stopped for about a day but now its back. I saw a thread on this problem awhile ago but no one seemed to have solutions, mostly theorys. Anyone have any ideas what it could be, or where the best place to go get it checked out or fixed? thanks a lot

Gauth.

[Sneeza]

I am a first time skyline owner - and there is no manual in the car... can I ask a dumb question - what is Hicas? I know there is a light on my dash for it..... My 180sx was so much easier to understand hahaha

[N I B]

Hicas is something to remove from all cars ASAP.(4 wheel steering)

[tenzero]

Hi Steve,

Why should the 4 wheel steer be disabled in the skyline and all other cars ??

Cheers.

D.

[Nexus_SiX]

Hicas is a computer that sits above the rear wheels. Its job is to "steer" the rear wheesl slightly when you move the fronts. Usually about 2 degrees. The theory is to make the car safer and more accurate in is turning..

[Gradenko]

Here's Nissans explanation of HICAS. (Taken from sales spin for a US model 240sx).

[G0DF4Th3R]

i thought HICAS turns a max of 1 degree above speeds of 60km/h?

also (not to hijack) but what about literally pulling the plug on HICAS (the plugs under the back of the car)?

[red17]

Sneeza, 180SX's and Silvia's have it too you know

However it was an option which means theres also a helluva lot of 180's and Silvias out there without Hicas.

Steve as usual has generalised to the point of being incorrect. It shouldnt be removed from ALL cars asap, because for starters not all cars have it. There is nothing inherently wrong with 4WS systems its just some people dont like the feel of it, each to their own. Ive never driven my car without it so ive got no idea what its "meant" to feel like.

Unless you are having problems with your HICAS and youve got no issues with the cars handling, theres no reason at all to disable it. Besides HICAS lock kits are yellow sticker material.

R32's in particular seem to be having all the HICAS issues of late, but it might be something to do with age. Perhaps the 33's turn will be soon

Red17

[N I B]

Who is red17?

[Sneeza]

Thanks for the explanation guys!

Red17 - my 180sx never had no orange light saying HICAS! The skyline has way more dials, lights and crap hahaha.

[int21h]

Hope i'm not hi-jacking here, but i think my HICAS is playing up.

It seems whenever i'm turning a corner and hit a bump, the backend kind of floats to a side. Its hard to explain, but it doesn't feel good at all! Almost loosing control type of feel.

I'm going to disconnect it this weekend,and if anyones interested, will let you know the results.

[Gav]

Having experienced my GTR both with and without HICAS I definately prefer without.

The HICAS takes inputs from vehicle speed and steering wheel position to determine in what direction the rear wheels move and by how much.

Unlike the ATTESSA 4WD system, it doesn't take inputs from individual wheel speed nor from axial or lateral G forces.

When the car is being driven sedately or even moderately hard it does make cornering easier.

When on the limit such as track work, the HICAS system will not pick up that the rear end is sliding and will actually turn into the corner more.

I have found by locking out the HICAS that the car is more predictable when the rear has broken traction.

Each to their own I guess depending on what you plan to do with your car, however I have no plans to refit mine.

[int21h]

Ok, so the HICAS is causing major probs in my car.

Should unplugging the major plug that goes down to the HICAS stop it from working?

Thats what i've done, and found the orange light on the dash lights up. But i still have the problem when i go over bumps, it throws the car out a bit.

So this means that it is either still working, or something mechanical has stuffed up inside the hicas.

[Milo]

As i am only a recent R33 owner I no not too much about them.

From what i understand the HICAS indicator only lights up when there is a problem with the HICAS. Ie when the engine is not on.

Therefore it would also light up if you unplugged the 'major plug'.

Also the HICAS as i understand only alter +/- 1 Degree or part of.

[gansianz]

i dun know much abt car mechanics but how do i unplug the HICAS?? where is the plug situated at?

i always got the feeling tht my GTST gonna spin out of control while turning fast... wanna see whether disabling the HICAS will solve it.