Diy: Stop Hicas Warning Light (Without Bulb Removal)

[Dose Pipe Sutututu]

Hi All,

I know all you guys usually remove your HICAS warning light from your cluster but that involves more effort.

I have another quicker solution, and is 100% proven.

On the HICAS ECU, there's a specific PIN for the dash warning light. All you need to do is snip it, easy as!

How it connects up:

ECU Schematics:

So all you need to do it go cut PIN 15 on the HICAS ECU (larger one in the boot). PIN 15 is a GREEN WIRE with a WHITE STRIPE. You can locate it look at the backside of the harness, it's on the bottom row, 3rd pin from all the larger 4 wires.

Bye bye HICAS light

P.S. thanks http://www.theautomotiveindia.com for the images.

[GTSBoy]

All I did was completely unplug the smaller of the 2 plugs on the (R32) HICAS control unit. HICAS de-activated. No dash light (obviously enough).

I haven't looked at an R33 HICAS CU to see if the plugs are the same as R32. From the diagram above it looks like they're not.

Anyway, make sure you know what model car you're playing with is all I'm saying.

[Dose Pipe Sutututu]

OH FEK... forgot to add..

The above diagram is for a R34 GT-t HICAS ECU, R33 GTS-t uses the same layout with an additional PIN 13.

Either way, PIN 15 is of interest, which is GREEN with a WHITE STRIPE for both models

[ZRBE]

Noticed HICAS light was on getting it back after my suspension was checked out.....

I have a HICAS lock out bar & also an aftermarket Momo steering wheel. I know these cam cause the light to come up on my dash but it was never on when I got the car.

Power steering fluid is fine.

That's all I have checked.. I know this will obviously stop the light coming on, but why did it come on in the first place?

93 r32 gtst type m

Edited July 15, 2013 by Zrobe

[GTSBoy]

That's easy. I'm willing to bet that the boss kit for your steering wheel does not have a drive for the steering angle sensor. Guaranteed to lead to HICAS fault. If you didn't have a lock bar in, it would also lead to your car driving down the road sideways.

[ZRBE]

That's easy. I'm willing to bet that the boss kit for your steering wheel does not have a drive for the steering angle sensor. Guaranteed to lead to HICAS fault. If you didn't have a lock bar in, it would also lead to your car driving down the road sideways.

Sorry, that still left me with quite a dull look on my face..

So I need to get a steering angle sensor?

I don't even know what a boss kit is... Is that like the extension for the column?

Sorry guys, I'm an idiot

Edited July 15, 2013 by Zrobe

[Dose Pipe Sutututu]

the thing that mounts your aftermarket steering wheel to your steering column, that's called a boss kit..

R32s have this gay sensor which needs to be rotated with the wheel or the HICAS ECU has a fit like Justin Bieber

[R.3.2.G.T.R]

bit in white

[GTSBoy]

Yeah. Hubs to suit R32 have a pin/dowel thingo that sticks into the angle sensor and drives it around so the HCU knows what you're doing with the wheel. I was under the assumption that all the HICAS cars had to have it - assuming that the steering angle sensor was in the same place for all cars. It's the most obvious place to put it.

[XGTRX]

r32

http://www.rhdjapan.com/boss-kit-hub-adapter-s13-r32-z32-super-hicas-26181

R33

http://www.rhdjapan.com/boss-kit-hub-adapter-s14-r33-c34-super-hicas-26217

[ZRBE]

Sweet, thanks for clearing that up guys. I like pictures.

So solution is this adapter or disabling the light altogether.

[XGTRX]

Sweet, thanks for clearing that up guys. I like pictures.

So solution is this adapter or disabling the light altogether.

I think you need those to work for your atessa system to work properly too. Don't quote me though could be wrong

[Dose Pipe Sutututu]

Sweet, thanks for clearing that up guys. I like pictures.

So solution is this adapter or disabling the light altogether.

I think with r32s they require the correct boss kit or the steering wheel will be dead heavy.

[GTSBoy]

No. When I got my car in from Japan it had the same wheel and boss on it that is there now. But it would do the strange "crank-on-30°-of-steering-angle-after-10-minutes-of-driving-once-you-went-over-80km/h" thing that they do when they don't have the steering angle sensor. My boss doesn't have it. So after fiddling about a bit I worked out my fix, which was to disconnect the smaller of the two plugs from the HICAS CU. Worked a treat. My power steering has otherwise always been completely normal.

Even now, 13 years later, with the whole HICAS gear ripped out of the car (including the rear subframe) I still have the HICAS CU under the parcel shelf, still plugged in to the larger of the two plugs.

[niZmO_Man]

Bit of a tangent, but has anyone experienced the steering wheel "kicking"? As in, the R32 goes from light to heavy steering above a certain speed. Obviously it's malfunctioning and 'kicking in' when I drive around town (annoying and dangerous). My car always has this issue. Disconnecting the smaller plug from HICAS computer only lessens the frequency of the 'kick'.

[GTSBoy]

That sounds like you have a problem separate to HICAS as such. If the "weight" of the steering changes, it is possibly because the solenoid on the rack is opening and closing (when it shouldn't). I had it go heavy for a while when my O2 sensor committed suicide and took out the loom. That loom also included the wiring for the power steering. So you can see that there are a few non-obvious ways that this might occur.

[niZmO_Man]

Yeah it's so damn annoying . Funnily enough, I replaced my 02 sensors with new ones, no difference to steering! Hahaha.

It's definitely electrical. I'm thinking grounding/voltage issue causing solenoid to go spastic. The 4WD relay in the boot clicks as well, lights dim (big current draw). Fricken R32s. With the HICAS computer plugged in, it's horrible to drive.

[Chris32]

Can anyone confirm this works on a 34 Gtt?

[Dose Pipe Sutututu]

the HICAS schematic I posted up is actually from a R34 GT-t, R33 GTS-t uses the same with one extra power pin (left of Pin 14)

[discopotato03]

I reckon the easiest way is to pop the pin from the relevant wire out of the plug and elec tape it to the loom . It doesn't take much longer and is reversible , not that you'd want to but why butcher something if doing it this way is so easy ?

A .