Toyota MR2 Power Steering System

24 Янв 2015 | Author: | No comments yet »
Toyota MR2

Toyota MR2 Power Steering


Everyone has wondered how to the MR2 Power steering pump so it is not a noisy power hog because always on full throttle. some sort of motor or using a small off-the-shelf would not work for me. One, I’m not great of a designer of controllers leave this up to Otmar). a small off-the-shelf controller not work on high voltage Plus, I would have to some type of Micro or Stamp to get all the functions I want.

So I decided to get the original motor from a MR2 at the junk yard and try to it up. Well, it works better I anticipated. One of the modes of the MR2 controller is to the hydraulic pump to a stop there is no movement of the steering or vehicle road speed: power! I have also it to enable itself when the Contactor is engaged. I’m the original steering wheel from the MR2, so it senses how steering I’m applying. It is getting road speed from the cruise control sensor to limit over-steer at road speeds. It uses the in the pump to tell you when the are worn or overheated.

What you need:

The P.S. provided are from a ’94 and ‘95 MR2, so try and get all the from a Toyota close as to these years. There are a different versions of the schematics so use the one that best suits needs.

1. Hydraulic Pump an MR2

2. P.S. ECU (not the main ECU)

3. P.S. Driver Relay is externally attached)

4. Sensor (inside the switch from the steering column)

5. Wiring harnesses for all above

6. relay with N.C.

7. 1K Ohm resister

8. Various multicolored wire and loom to rebuild the

9. 80 Amp Fuse

The Hook up:

With the provided you have to build a new harness from the OEM harness cut out of the It’s a lot of work so get busy…

Toyota MR2

1. I used the original cruise speed sensor for my ’85 S10 to drive the ECU and it has with good results. results or pulse rates may

2. The ICT (PSCT) is a control wire for the engine ECU to enable the P.S. the engine is running. The P.S. ECU is when this wire is low (grounded). So I used a micro-sized and a 1K Ohm resister to keep this low until the main contactor is I hooked the small relay in with main contactor. My has no problem with this.

3. My pump was from a slightly year so it had only 3 sensor After some testing I that it was missing the V-L or Violet/Light wire. Look at the schematic and you see how easy this was fixed.

4. The TC (CHK) and IDUP wires I did not up; apparently they are not needed.

1. Put a switch in your dash to the P.S. ECU via the ICT (PSCT) control I call this Stealth

2. I used a self-resetting 80 amp breaker of a fuse. Your preference…

Toyota MR2
Toyota MR2
Toyota MR2
Toyota MR2


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