So i thought that all supras were hydraulic reaction type? Im wondering if im missing something because they sell hydraulic and non hydraulic power steering pumps.
hydraulic PS??
- Thread starter suprahflyg
- Start date
If it's a power steering PUMP, it's hydraulic. Where are they selling these non-hydraulic power steering pumps? It sounds like shenanigans to me.
Probably this^ . You can tell by looking at your steering box whether or not you need to buy progressive. There is an electrical connection on it if you have pps.
Last edited:
That does seem to be the case, though Toyota refers to it as a hydraulic reactionary chamber, and it's not part of the pump. Most other parts places do seem to refer to it a hydraulic reactionary pump. Intresting. The only noticeable difference between the pumps seems to be the flow control valve.
Dirgle;1980838 said:
Yeah sorry, I first said pump. But it's actually a hydraulic reactionary chamber in the gear box. There is a solenoid controlled by the ecu if you have pps.
I've have wondered about this. What is the pulley size difference. I ask because while there are two pulleys listed they are not always separated by a PPS system. take for example, Non-PPS was available on the NA MA70 clear through 1993. However the original pulley, PN:44311-14050 was not listed for the NA after 8/1989. This might just be a peculiarity of the Toyota cross reference system, or maybe there was a manufacture change and very little significant difference between the pulleys. I'm not sure as I have never seen them side by side.IJ.;1980842 said:
The PPS system doesn't interact with the ECU(Engine Control Unit)exactly, thought it does have its own computer. The only input it receives is a speed signal from the speedometer in the combination meter.jdmfreak;1980847 said:
jdmfreak;1980847 said:
The speed sensor to the ecu to the solenoid. Don't know all the specifics such as what speed/what percentage.
http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=15
Pps has its own computer
It's supplies 5v to that wire reducing that voltage progressively once at speed....
Pps has its own computer
It's supplies 5v to that wire reducing that voltage progressively once at speed....
Last edited:
I edited my earlier post... It supplies 5v to make the steering light and reduces the voltage as the speed increases to stiffen the steering... So unplugging the wire makes it stiff all the time
It's not quite that simple, I replicated the stock signal with my MoTeC and it's variable voltage not on/off.