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| This is a discussion on power steering hacking within the Gen II Prius Modifications forums, part of the Gen II (2004-2009) Toyota Prius Forums category; Ok will be waking up early tomorrow to try to find the "Torque Sensor". I will try to "steer" with ... |
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power steering hacking
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03-05-2008, 12:25 AM
| #11 |
| Junior Member Join Date: Nov 2006 Location: Oregon City
Posts: 29
My Car: 2006 Prius Model: Package: #8 Thanks: 0
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Friends: 0 |  Re: power steering hacking Ok will be waking up early tomorrow to try to find the "Torque Sensor". I will try to "steer" with my laptop, im thinking i jsut need to see how the "Torque Sensor" output there there should be no need for additional hardware, but maybe a plug assembly for the final clean up. thanks for the PDF. O and lexus!! the fact that they remove all the really cool stuff form the prius in the US and the lexus get them... |
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03-05-2008, 02:08 AM
| #12 |
| Feathered Member  Join Date: Oct 2007 Location: Hamilton, New Zealand
Posts: 61
My Car: 2007 Prius Model: Package: I-Tech Thanks: 0
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Friends: 1 | Re: power steering hacking A word of caution: I believe full "drive by wire" systems are illegal in many countries; and I suspect the usa to be one of them. Beware of legal, as well as technical, hurdles. A really big "cut off" switch and a person in the seat at all times might help here.. Otherwise, it sounds like a pretty cool project!  |
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03-05-2008, 04:16 AM
| #13 |
| Junior Member Join Date: Nov 2006 Location: Oregon City
Posts: 29
My Car: 2006 Prius Model: Package: #8 Thanks: 0
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Friends: 0 | Re: power steering hacking The plan is to have some sort of mandatory button to be depressed and yes there will all was be a driver in the seat. Good point on the laws. I have a privet road I can test on but to test it on the public road might require some sort of permit or something... Any one know the laws in Oregon for testing experimental automobiles? |
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03-05-2008, 05:28 AM
| #14 |
| Senior Member  Join Date: Dec 2007
Posts: 2,546
My Car: 2005 Prius Model: Package: Thanks: 3
Thanked 183 Times in 150 Posts
Friends: 9 | Re: power steering hacking great plan the prius already can park itself so wy not ( with somebody behind the wheel ) drive to |
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03-05-2008, 01:43 PM
| #15 |
| Senior Member Join Date: Jun 2004 Location: hell
Posts: 2,894
My Car: 2004 Prius Model: N/A Package: #9 Thanks: 9
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Friends: 5 | Re: power steering hacking legal? no.. it's not legal at all. it won't be legal until the DOP stamps it for road use. what it takes to get that... no clue. keep it on your private road untill you "perfect it" that would include having the system on trying to steer towards a line and have the car steer back... then again.. this could be a huge safety issue still. the lexus is designed with the distronic and the new anti crach wave lengh sensors... so that car knows what's in front of it. how far.. how fast the car is traveling.. driver input, and line placement.. plus drivers head position. now that's a secure sytem. good luck... post anthing you find. i'm definetly curious. 
__________________ Silver 9 as of June 12th '04 (over 123k Miles now) Decals, Mud Flaps, 1200Watt Modified sign wave Inverter, BT Tech Rear Brace, coastaletech 2" receiver hitch, and 215/45/17 tires.  |
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03-05-2008, 04:29 PM
| #16 |
| Junior Member Join Date: Nov 2006 Location: Oregon City
Posts: 29
My Car: 2006 Prius Model: Package: #8 Thanks: 0
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Friends: 0 | Re: power steering hacking After hunting around all morning for the "Torque Sensor". I found one set of wires coming off the steering column that I can only assume this is it. but I have no why of getting to it to confirm this without removing the steering weal. The other place it could be would be servo motor which has 2 mane power lines as well as 4 small wire going up to a box labeled 89650-47102 EPS LH this box all so has 2 black and 2 white wires coming to it, as will as power in wires.  This photo show that connector I can not enplane think its the sensor I am looking for, don't know the pinout for it.  Hear is the power steering that brown cord is the Power add the green one is the 4 wires, they both go back up to the EPS box. I am thinking there some sort of rotational sensors to feed back to the EPS box in the same way a hobby servo dues.  hear is the EPS box you can see the power coming in big white and white/black to the far left then the output power cable to the PS raped in brown plastic and then the black and wight wires and lastly the 4 PS(sensor?) wires. I am thinking it might be simpler to just build a new EPS box to go inbetwen this box and the PS. Using a few realeays for safty and some and interject my own commands to the PS. any one have any way of getting a hold of the schematics for the EPS?
__________________ I bought my Car to drive its self one day, if it happens to look funny and get ok gas mileage doing it so be it. |
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03-05-2008, 04:58 PM
| #17 |
| SuperMID designer  Join Date: Dec 2003 Location: Yokohama, JAPAN
Posts: 1,991
My Car: 2010 Prius Model: N/A Package: G Thanks: 10
Thanked 273 Times in 125 Posts
Friends: 8 | Re: power steering hacking FYI, Following list is some fail-safe feature written on the Toyota Tech manual; torque sensor malfunction: inhibit power assist motor over-heat: limit power assist motor drive line short: inhibit power assist motor over-current: inhibit power assist EPS ECU over-heat: limit power assist EPS ECU temp sensor malfunction: limit power assist current to a constant value EPS ECU malfunction: inhibit power assist speed or rpm signal malfunction: power assist current to a constant value low supply voltage: suspend power assist Ken@Japan Last edited by ken1784; 03-05-2008 at 05:00 PM. |
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03-05-2008, 05:02 PM
| #18 |
| Senior Member Join Date: Jun 2004 Location: hell
Posts: 2,894
My Car: 2004 Prius Model: N/A Package: #9 Thanks: 9
Thanked 18 Times in 18 Posts
Friends: 5 | Re: power steering hacking there is a site you can go to. it's a toyota tech site. for 10 dollars you can access it for 24 hours and get all the info you want. I think it's Here. |
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03-05-2008, 06:18 PM
| #19 |
| Junior Member Join Date: Nov 2006 Location: Oregon City
Posts: 29
My Car: 2006 Prius Model: Package: #8 Thanks: 0
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Friends: 0 | Re: power steering hacking Ok something interesting thing happened putting car back together after confirmed that every thing was working and that there where no "lights" on that should not be. I diced to diconect the "unknown plug" and see if it was in fact the "torque sensor" truing back on the car I get an VSC light. but the power steering is still functional. So I am thinking the "torque sensor" may be the 4 wires in the green plastic? Do not know what the "unknown plug" is for, but seams it has something to do with the VSC? |
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03-05-2008, 06:24 PM
| #20 | |
| Junior Member Join Date: Nov 2006 Location: Oregon City
Posts: 29
My Car: 2006 Prius Model: Package: #8 Thanks: 0
Thanked 0 Times in 0 Posts
Friends: 0 | Re: power steering hacking Quote:
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