Hicas Delete

[komdogg]

Ok first of all I have serched this plenty and while theres a ton of threads on installing a lock bar there is none on how to delete the entire system including the ecu.

I am planning to do this in my car (R33 GTS-T Series 2) and have heard that if you remove he hicas ecu it messes up your power steering unless you loop a particular wire in the harness or add a resistor or something (no one seems to know anything exactly just all vague info).

So my question is when I have removed my hicas rack and installed the lock bar, and removed the hicas ecu, what do I have to do in order to have my steering unaffected?

[RBceffy25]

I Have just done this and I also want an answer for this question

Anybody?

[komdogg]

I Have just done this and I also want an answer for this question

Anybody?

APPARENTLY, from what I've found out recently (haven't done it myself yet but will do soon). Hicas ecu controls speed sensitive power steering, this makes sense as speedo signal wire goes from gearbox>speedo>ecu>hicas ecu, as far as I know. This was told to me by haltech as the reason they gave for their ecu's not being able to adjust speed sensitive power steering is that only load switch is controlled by ecu while the rest is done by the rear hicas ecu. Can anyone else verify?

so looks like you have to leave the hicas ecu in. this presents a problem, a constant hicas waring light on the dash, but if you pull the globe, since the same warning is for power steering level, you lose that, which is annoying! because I hate when little things like that don't work.

check this http://www.aus300zx.com/forum/showthread.php?t=313119 it has the hicas wiring diagram in it!!!!!!!!

also this http://www.skylinesaustralia.com/forums/topic/128604-tomei-hicas-lock-kit/ it explains how the tomei lock kit works (roughly)

other threads say cut the green wire with white stripe so I'm not sure which one to cut? from the diagram

http://www.skylife4ever.com/2011/01/hicas-delete.html this thread says cut green with white stripe AND claims that it will still allow the hicas light to come on to warn you any other ecu functions that use it EXCEPT hicas. Which is basically the perfect scenario.

Im still considering Tomei kit though as according to this http://www.skylinesaustralia.com/forums/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=55225 it looks like 2 wires need to be cut?

let me know if you try any of these and how it affects the power steering fluid light coming on and if it affects the feel of your steering (heavier?)! since the idea is to have the hicas and warning light disabled without affecting any other functions! if we solve this we can end this constant debate once and for all

[RBceffy25]

Hell yea dude, some hard facts would pay.

However I think I am just gonna use the Tomei kit to be safe.

[central coast person]

R33 GTS-4's and r34 GT-4's dont have HICAS from factory, they have a the ATESSA ECU to control power steering and also there is an extra rear link in the suspention compared to other skylines with HICAS, obiouly there are wiring and relay differneces but they are the 2 main ones. First you will have to see if you can use a 4WD ECU to get the ball rolling ........