Go Back   Club Lexus Forums > Lexus Model Forums > GS Models > GS - Second Generation
Sign in using an external account
Register Forgot Password?

Modify steering ecu DIY

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 02-10-12, 12:46 PM   #1
jjm1975
Driver School Candidate
Trader Score: (0)
 
Join Date: Nov 2010
Location: Holland
Posts: 17
Send a message via AIM to jjm1975 Send a message via Skype™ to jjm1975
Default Modify steering ecu DIY

After reading all the posts about loose steering on the highway i was looking around for a newer version of my steering ecu.I have a gs400 and it came with the steering ecu 89650-30570.

L-tuned steering ecu's are not available anymore and the newer model ecu's are not easy to lay a hand on here in europe. So why not make a tuned steering ecu yourself.

In the attachment is a pdf with instructions how to modify the steering ecu with a simple 10Kohm potentiometer. Really cheap and great satisfaction.


Just in case... Mod is at your own risk!
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
Attached Files
File Type: pdf Steering ecu.pdf (90.5 KB, 377 views)

Last edited by jjm1975; 02-11-12 at 05:46 AM..
jjm1975 is offline   Reply With Quote
Old 02-10-12, 02:53 PM   #2
justablkv8
Lead Lap
Trader Score: (2)
 
Join Date: Dec 2011
Location: FL
Posts: 508
Default

What does this do?
justablkv8 is offline   Reply With Quote
Old 02-10-12, 02:58 PM   #3
KcMoGS430
Rookie
Trader Score: (1)
 
Join Date: Jan 2012
Location: MO
Posts: 55
Ryan Haynes
Default

Quote:
Originally Posted by justablkv8 View Post
What does this do?
I imagine it makes the steering feel better and more responsive.
KcMoGS430 is offline   Reply With Quote
Old 02-10-12, 03:08 PM   #4
jjm1975
Driver School Candidate
Trader Score: (0)
 
Join Date: Nov 2010
Location: Holland
Posts: 17
Send a message via AIM to jjm1975 Send a message via Skype™ to jjm1975
Default

Quote:
Originally Posted by justablkv8 View Post
What does this do?
The same as a L-tuned or post 2002+ steering ecu does...

Last edited by jjm1975; 02-10-12 at 03:18 PM..
jjm1975 is offline   Reply With Quote
Old 02-10-12, 03:20 PM   #5
sakataj
Lexus Fanatic
Trader Score: (171)
 
sakataj's Avatar
 
Join Date: Jun 2008
Location: tenn
Posts: 15,412
Sakataj
Send a message via Yahoo to sakataj
Default

hmmm not to be debbie downer but how do we know this wont just fry your ecu and what do you have to prove this is the same as the L-tuned,S.D. or gs430 steering ecu?

heads up to the US guys... the l-tuned ecu is supposed to be very similar to the GS430 OEM steering ecu and the S.D. steering ecu is also supposed to be similar
__________________


FOR ALL YOU LOWBALLERS THIS IS HOW I FEEL:
http://www.modified.com/editors/modp...ors/index.html
sakataj is offline   Reply With Quote
Old 02-10-12, 03:55 PM   #6
krispl
Pole Position
Trader Score: (0)
 
Join Date: May 2009
Location: CA Bay Area
Posts: 218
Default

I have GS430 so does that mean that my steering ecu is similar to L Tuned ecu? Is there a big difference between OEM GS430 and L Tuned ECUs or it's very minor?
krispl is offline   Reply With Quote
Old 02-10-12, 03:56 PM   #7
krispl
Pole Position
Trader Score: (0)
 
Join Date: May 2009
Location: CA Bay Area
Posts: 218
Default

Quote:
Originally Posted by jjm1975 View Post
After reading all the posts about sloppy steering on the highway i was looking around for a newer version of my steering ecu.I have a gs400 and it came with the steering ecu 89650-30570.

L-tuned steering ecu's are not available anymore and the newer model ecu's are not easy to lay a hand on here in europe. So why not make a tuned steering ecu yourself.

In the attachment is a pdf with instructions how to modify the steering ecu with a simple 10Kohm potentiometer. Really cheap and great satisfaction.


Just in case... Mod is at your own risk!
Sounds very cool and very doable!
krispl is offline   Reply With Quote
Old 02-10-12, 04:09 PM   #8
jjm1975
Driver School Candidate
Trader Score: (0)
 
Join Date: Nov 2010
Location: Holland
Posts: 17
Send a message via AIM to jjm1975 Send a message via Skype™ to jjm1975
Default

Quote:
Originally Posted by sakataj View Post
hmmm not to be debbie downer but how do we know this wont just fry your ecu and what do you have to prove this is the same as the L-tuned,S.D. or gs430 steering ecu?
Google(Where someone did this before just in a different way (http://autospeed.com/cms/title_Modif...8/article.html) and logical sense. The only thing the steering ecu does is sending a voltage to the solenoid valve on the steering rack and this voltage varies regarding to the speed you are driving.

On the board is a empty spot with a potentiometer symbol at the left side of the standard resistor. I don't have a prove but i guess its there for test cases. I de-soldered the standard resistor and readout its resistance. Then dialed the potentiometer in at the same resistance and soldered it in place of the old resistor. Nothing will fry in this situation because i created the same resistance with the ability to adjust. Then i slightly dialed in a lower voltage ( -0,06v) mentioned in a TSB (as a pdf attached).

Result is a more heavy steering wheel and no nervous highway miles anymore...
Attached Files
File Type: pdf L-ST001-98.pdf (25.7 KB, 229 views)

Last edited by jjm1975; 02-11-12 at 02:30 AM..
jjm1975 is offline   Reply With Quote
Old 02-10-12, 04:14 PM   #9
jjm1975
Driver School Candidate
Trader Score: (0)
 
Join Date: Nov 2010
Location: Holland
Posts: 17
Send a message via AIM to jjm1975 Send a message via Skype™ to jjm1975
Default

Quote:
Originally Posted by krispl View Post
Sounds very cool and very doable!
http://www.clublexus.com/forums/gs-s...ering-ecu.html

You could check what kind of ecu you have:
9/97-1/02 = 89650-30570
1/02 + = 89650-30610
SportDesign = 89650-30600
jjm1975 is offline   Reply With Quote
Old 02-16-12, 01:56 AM   #10
YviE
Lexus Test Driver
Trader Score: (3)
 
YviE's Avatar
 
Join Date: Apr 2010
Location: France
Posts: 1,111
Default

Great find. I'm going to look into this.
__________________
YviE is offline   Reply With Quote
Old 02-16-12, 07:22 AM   #11
zebt66
Pole Position
Trader Score: (0)
 
zebt66's Avatar
 
Join Date: Feb 2008
Location: NC
Posts: 395
Default

Great find, But you can also order the Toyota Aristo JZS161 from Japan.
__________________
98 Lexus GS300 2JZGTE - 2010 Lexus GX460 - ETC...
zebt66 is offline   Reply With Quote
Old 02-16-12, 07:54 AM   #12
YviE
Lexus Test Driver
Trader Score: (3)
 
YviE's Avatar
 
Join Date: Apr 2010
Location: France
Posts: 1,111
Default

Quote:
Originally Posted by jjm1975 View Post
http://www.clublexus.com/forums/gs-s...ering-ecu.html

You could check what kind of ecu you have:
9/97-1/02 = 89650-30570
1/02 + = 89650-30610
SportDesign = 89650-30600
I am going to do this mod and I purchased a second ECU (just in case I mess up something...)

It's a 89650-30560. Is it any different from the 30570??
__________________
YviE is offline   Reply With Quote
Old 02-16-12, 08:23 AM   #13
jjm1975
Driver School Candidate
Trader Score: (0)
 
Join Date: Nov 2010
Location: Holland
Posts: 17
Send a message via AIM to jjm1975 Send a message via Skype™ to jjm1975
Default

Quote:
Originally Posted by YviE View Post
It's a 89650-30560. Is it any different from the 30570??
I dont know exactly, but from what i read of totodiy the 30560 is used in the european spec gs300 and 430 through all the years...
I also dont know to which ecu it can be compared... Lets find out!
jjm1975 is offline   Reply With Quote
Old 04-19-12, 03:49 AM   #14
YviE
Lexus Test Driver
Trader Score: (3)
 
YviE's Avatar
 
Join Date: Apr 2010
Location: France
Posts: 1,111
Default

Some pictures for this thread!

Power Steering ECU:
Click the image to open in full size.

Removed the stock resistor and soldered in 2 wires:
Click the image to open in full size.

Soldered a 5kΩ potmeter on the 2 wires:
Click the image to open in full size.

Made a little hole in the housing for adjustment:
Click the image to open in full size.

Haven't tried it out yet.
__________________
YviE is offline   Reply With Quote
Old 04-19-12, 09:27 AM   #15
justablkv8
Lead Lap
Trader Score: (2)
 
Join Date: Dec 2011
Location: FL
Posts: 508
Default

^ thats awesome, post a review?
justablkv8 is offline   Reply With Quote
Old 04-19-12, 09:27 AM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
steering ecu Rosser027 IS - Second Generation 4 05-25-14 11:41 AM
CA WTB: L-Tuned Steering ECU bbqness 2Gen GS430 / 400/ 300 Classifieds (98-05) 3 08-07-13 12:27 PM
L-Tuned Steering ECU for gs400 RanGer498 Suspension and Brakes 3 04-29-04 03:27 PM
L-tune steering ECU for GS430? lex430 GS - Second Generation 28 04-14-02 07:28 PM
L-Tuned ECU GSPOWER GS - Second Generation 11 06-07-01 09:44 AM


Tags
change, diy, ecu, gs300, gs400, gs430, heavy, isf, lexus, locati, lx470, modification, pps, steering, tuned

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 01:18 PM.

Join ClubLexus

Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info