Alantjai

I am swapping it and calibrate it afterwards, but the 08 ecu is getting stiffer now.. So i am almost sure the ecu has a lot to do with the steering tiffness. I will try out the 2011 sport ecu when i get it.... Please be patient guys

dojoman

iTrader: (5)

I'd like to know this as well but likely it's part of engine ECU.

Alantjai

Guys

I Finally installed the Steering ECU of the 2011 Fsport in my 2006.. I can confirm that this is just plug and play without any errors on dash.

The steering ecu seems to be calibrating by itself, so it is getting heavier each time I drive ( this was also like when I put in the 2008 ECU)

I still need to let lexus calibrate the steering ecu, so untill then I can only say that the steering feedback is better en stiffer than it was..

btw thanks Jeff for the ECU

rog1206

iTrader: (4)

Thanks for the update Alantjai!

Jeff Lange

iTrader: (1)

With that information it seems correct to say that all 2IS steering ECU's are functionally interchangeable, with only minor differences. I would think the IS F ECU is probably the best way to go if you want the most significant change, but if you can find an 09+ Sport Package ECU, that's probably a good option too, especially if you have an 06-08.

Jeff

B16da9

iTrader: (7)

Jeff, did you use a techstream to calibrate your car to the new ECU or was it a plug and play ordeal.

Jeff Lange

iTrader: (1)

I used a TechStream to calibrate it.

Jeff

Alantjai

I didn't calibrate the 2008 ecu, but will let lexus calibrate it next week.

And like jeff said, all IS steering ecu's are interchangeable

The difference is that the ISF uses a different bracket.

B16da9

iTrader: (7)

What could go wrong if you do not calibrate it.

Wish modifiying the sterring on this car was as simple as my integra, remove the valve body loop some hydrolic lines and presto.

Jeff Lange

iTrader: (1)

Without calibrating it, you can have differing assist levels while turning left vs. right, along with other minor issues. Both ECU's Alantjai has done without calibrating have been previously calibrated though. I'm not sure what would happen with a new ECU and not calibrating it. I calibrated both of mine before starting the car.

Jeff

Gville350

iTrader: (10)

Maybe I missed it, but exactly how does the steering ecu get calibrated and does it have to be installed in the car in order for it to get calibrated? I've seen these steering ecus on eBay a few times and as long as it's an 2IS or IS-F these will be plug-and-play and behold a stiffer-feel in the steering response?

I've got a '06 sports pkg 350...so would both the '09+ AND IS-F steering ecus be an upgrade from my stock ecu?

BTW Jeff, how's that LSD working out for you? Perhaps an update in your LSD thread to keep things consistent. I'll looking at picking up a used 350 pumpkin and getting either a Quaife or seeing if I can luck out to get a '09+ IS-F Torsen.

Jeff Lange

iTrader: (1)

I would think that the 09+ ECU would probably be better, the 09+ Sport Package ECU would definitely be better, and the IS F ECU better than that. The ECU needs to be in the car to be calibrated. You use the TechStream once it is installed to calibrate it, with the ignition on, engine off.

I still have my stock 2011 ECU, which I might try to sell, not sure yet. I don't really need it, but we'll see.

As for the LSD, still loving it. I'll probably post an update in my other thread in a bit. It was certainly nicer having it through this winter, compared to last year without.

Jeff

Gville350

iTrader: (10)

^Very good...thanks!

So the TechStream device is a dealership-only unit...correct? Unless you have something like this :



Glad the LSD is holding up well!

Jeff Lange

iTrader: (1)

TechStream or TechStream Lite would both work well.

The Lite just cannot flash ECU's with new software, it can do everything else.

Jeff

Gville350

iTrader: (10)

Ouch, over $500 for the pkg including the service subscription : "Purchase the Mongoose MFC for $482.63, then subscribe to Toyota’s factory-level Techstream software to run on your PC. Subscriptions are currently available from Toyota for two days ($55) or a full year ($995).

You get access to:
* Complete factory-level diagnostics software
* ECU reprogramming calibrations
* Repair data
* Wiring diagrams
* TSBs
* Identifix Direct-hit service"

I wonder what all entails the "ECU reprogramming calibrations". Hmmmm.