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ase_master327, Shop Owner
Category: Toyota
Satisfied Customers: 5288
Experience:  +15 years experience with Toyotas. Bumper to bumper diagnosis & repair.
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Submitted: 8 years ago.
Category: Toyota
Expert:  ase_master327 replied 8 years ago.

The sensor on the power steering system is used to control idle speed while the vehicle is not moving, and the steering wheel is being turned. So it could likely be the problem. If it has a sensor it will be on the power steering pressure line. But there is not one listed for your vehicle.

The next thing I would be looking at is the belt tension. If the belt is not the problem, we would go on to inspect the ISC valve (Idle Speed Control).

Customer: replied 8 years ago.
there is a presure switch on this vehicle my question is will it make the steering tight at idle and fine going down the road
Expert:  ase_master327 replied 8 years ago.

Ste pressure switch is only for idling up the engine so it creates the extra power necessary to turn the pump while the vehicle is sitting still. IT sends a signal to the computer saying, there is pressure on the power steering system, and the computer idles the engine up, similar to when you turn on the air conditioning while the engine is idling.

So to answer that particular question..

"will it make the steering tight at idle and fine going down the road "

No, it does not have anything to do with it. The idle air control vlave will have to be inspected if the problem is while the vehicle is moving.

Is the engine idling funny? What's it doing high... low idle??

Customer: replied 8 years ago.
no it idles fine but when it sits still the steering is tight
Expert:  ase_master327 replied 8 years ago.

I misunder stood your second version of the question. Don't pay attention the entire last reply I left you...Sorry for any confusion it might have given you...

If there is a sensor in the pressure line...

Then it would definately be the problem, either that or belt tension, like I mentioned before. That is what it controls, this exact problem...

But, does the power steering work fine while driving slowly? If not, then you have hydraulic system problems, still.

I take it doesn't wine at you when you turn the wheels, right? That would indicate a possible air pocket in the system, if it did. The fluid would be frothy looking or pink if this was the case.

Customer: replied 8 years ago.
no there is no noise it is just tight at idle and when you take it down the road it is fine any ideas i have been a mechanic for over 20 years and this one got me stumped
Expert:  ase_master327 replied 8 years ago.

My information (ALLDATA), doesn't show the pressure switch. If it has one, it would be on the high pressure line for the power steering system. It doesn't even have a labor time for changing it, so...

If you don't see the pressure switch then you have a, brand new, bad, power steering pump.

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