Can A Faulty Speedo Affect Power Steering When Hicas Is Removed

[nsta]

Hey guys, i removed my hicas with the hicas lock bar according to the write up by geoff, and the hicas light shows up on the dash, but more importantly, i have no power stering at all. I done this at the same time i done my auto to manual conversion. Now, when i took the car for a drive, the speedo was working, but off by heaps!, like when im going 100km, it says im going 30km, the revs seems to be showing ok though. I was thinking that since power steering is electronically controlled to be light at low speeds, that if the speedo is not functioning correctly, the controller shuts off, thus making steering hard?

p.s when i done the auto to manual conversion, we used the auto speedo cable into the manual gearbox sensor.

does this sound right?or is this how r33's get after removing HICAS?

[BHDave]

If anything your steering should be light all the time with that fault.

I'm also inclined to think that you have not installed the speed sensor correctly and it is skipping as that is the only way i can see you having such a massive differential in speed reading. Assuming a slightly different diff ratio for auto r33's you may expect your speedo to be out by maybe 10-15% max.

Just as a trial. plug the hicas unit back in and turn on the car. You should have light steering again. If you don't the fault is related to whatever wiring you did during your gearbox swap, or by pure fluke something else in the power steering system has broken at the same time as you did the work.

[nsta]

oh what!, so with keeping the auto diff, my speedo is going to be out either way???? i never knew that! and i thought that the steering would get hard by default if the power steering unit shuts off????and does the r33 have a hicas computer aswell, which is what controls the power steering in the r32's i beleive

Edited September 25, 2007 by nsta

[BHDave]

maybe, i don't know that the diff ratios are different for certain. The p/s is mostly mechanical, not electric. when the engine runs the pump and everything are working. All the ecu does is bypass some of the fluid via a solenoid to adjust the weight depending on speed. Thats why, with everything working as it should and a low speed signal it should have very light steering. If it doesn't and you have followed the guide then you have another problem that is either causing the solenoid to stay open and bypass or the rack or pump has issues.

[nsta]

thanks for that, i ll have another look afterwards, but yeh its really heavy mate!.....from what i understand, you removed the factory hicas unit and all the plugs connecting to it, and replace with hicas lock bar, and hide away wiring, and be done with it, oh and alignment of course.

[QWK32]

when my speedo cable was on the way out the power steering used to just shut off for a bit then kick back in. when the cable completely flogged out the power steering wouldnt work at all. like you said there has to be some like between the powersteering and the speedo.

ps this was in a 32 but i cant imagine there being to much of a difference between the models.

[nsta]

thanks mate, this helps alot:)hopefuly its just a speedo thing