R33 GTST HICAS problem

[Michael33]

R33 GTST HICAS problems

Hi guys. I got an issue with my 1994 s1 R33 GTST's hicas.

If I drive over 80km/h the hicas light will be turned on, then I will randomly lose power steering on next start.  It is becoming more and more often recently.

I tried to enter hicas diagnose mode to see what is wrong. However, to my surprise, my r33 cannot enter diagnose mode. I followed this post but nothing happened.  http://www.sau.com.au/forums/topic/22193-hicas-diagnostic/

Here is my guess. My boss kit seems to be a normal boss kit that does not come with hicas. So when the hicas system kicks in, it cannot detect the steering wheel. Then the hicas light is turned on and I got heavy steering. This guess can also explain why my R33 cannot enter diagnose mode, I think.

 

Can anyone give me some idea? Will the boss kit cause this issue or something else?

 

Btw does anyone know some cheap skyline specialist in Melbourne?

 

I am not a native English speaker. So please do not mind my mistakes. Thanks guys.

 

 

Edited September 25, 2016 by Michael33

[colourclassic]

Did the problem start after you installed the aftermarket steering boss?

HICAS relies on a steering angle input to function correctly, if you've recently installed a steering boss which does is not compatible with HICAS it will cause the HICAS ECU to go into 'safe mode' which results in the heavy steering and warning light on the dash.

[89CAL]

It is really sensitive too btw. I had the right boss kit but installed it wrong so there was the slightest bit off free play on the steering angle sensor and had the same issue as you

Also later on i would have no power steering assist after startup sometimes randomly. Had to replace the HICAS ECU.

[Michael33]

4 hours ago, colourclassic said:

Did the problem start after you installed the aftermarket steering boss?

HICAS relies on a steering angle input to function correctly, if you've recently installed a steering boss which does is not compatible with HICAS it will cause the HICAS ECU to go into 'safe mode' which results in the heavy steering and warning light on the dash.

 

Thanks for replying. I am not sure about the boss kit. The one on the car has been there since I got the car.

However, even I got warning light since last year but I did not get heavy steering until 2 months ago.Pretty tricky.

 

I just find this. http://www.jdmr32.com/hicas-aftermarket-steering-wheel-error-light/

It looks like I should buy a consult interface and maybe a hicas equipped boss as well.

 

[Michael33]

13 minutes ago, 89CAL said:

It is really sensitive too btw. I had the right boss kit but installed it wrong so there was the slightest bit off free play on the steering angle sensor and had the same issue as you

Also later on i would have no power steering assist after startup sometimes randomly. Had to replace the HICAS ECU.

 

Why replace the HIACS ECU? Is it broken?

[89CAL]

I believe there is a capacitor or some internal component that fails. Can be repaired, but a just bought one off someone for $50