Recently purchased my Evo X and looking to see if someone could give me some insight. On the S AWC cluster that indicates your G's or yaw movement anytime I am above 50-60 mph it's always indicating. I will be in no turn just driving straight down the freeway and it will indicate. I have asked and I know it should not always indicate like this, anyone have any idea what might cause this Alignment issue, unbalanced tires, I've also heard people mention steering angle sensor??? Any help would be greatly appreciated.

Thanks, Andre

I've attached a picture of the indication driving straight at about 65 MPH.

 

Yep. If the display is indicating that the AYC is active even when you're going straight ahead, it has to one of two things: (1) your steering-angle sensor is shot (or, at least, the ACD/AYC ECU is being sent a bad reading) or (2) your steering wheel is actually turned.

Note that some people fail to mark the steering wheel when they remove it and then put it back on crooked, not knowing how important this is to a car like ours. But it was marked at the factory. If you disconnect the battery and pull off the airbag, you can see if the steering wheel was reinstalled turned. And please note the bit about disconnecting the battery.

ps. I really hate you for posting a pic with the outside temp reading 70*F. It's -7*F here.

 

Haha, thanks for the fast reply. I will try checking the steering wheel installation before taking it in to have the sensor checked.
Sorry for the bad weather I went home to NY for a couple weeks in December so I feel your pain. We're def in need of some rain in CA though.

 

I have a question about this...Why does it matter if the steering wheel is removed and then replaced at a slightly different position, presuming the sensor itself isn't itself removed and repositioned? Granted the wheel might be crooked, such that when you straightened the wheel the car would be turning, but, besides that, I don't understand why it would matter that the wheel wasn't straight...

 

You're correct that it doesn't matter which way the steering wheel, itself, is angled. What matters is that the column (on which the angle sensor sits) is centered relative to the wheels and tires. But, because most alignment techs are taught to center the steering wheel and then set toe, if you don't keep the steering wheel centered on the column, the next alignment will lead to an AYC issue. Plus, it seems to really bother people when the steering wheel isn't straight when driving straight.

 

The gravel truck I drive has its steering wheel off center. It annoying as f-word. I've tried correcting it a couple times now but every time I find I put it a bit too much this way, or not enough the other. lol.

 

I once spent the hour that was needed to calculate by how much I needed to adjust both steering arms to recenter the steering wheel on a 2G DSM and still have zero front toe. Then I spent another hour double-checking the math. Then I spent an hour doing the actual work.

The next day I paid the local alignment shop to correct all the errors I'd made.

And, yet, I did the same thing about 18 months ago on the Evo. (In my defense, I got it right this time. This primate can learn.)

So, yeah, I, too, am one of those people who can't stand an off-center steering wheel.

 

The funny part is that, after paying a Toyota dealer to align my GT-Four (twice), I had to get out a plumb bob, tape measure, and protractor, and do it myself, in order to get it right.
(Of course, this was a Toyota dealer where a salesman told me there was no such thing as a Celica AllTrac. )

Most alignment instructions, these days, call for centering the steering wheel first.
(Not that all "quckie" alignment shops actually do that.)


The centered steering wheel is more significant with newer cars, with all the audio and bluetooth controls on the wheel.
And, on the MR, the paddles on the column.

Back in the old days, we paid more attention to the varnish..
(E.g. the Alfa's wood steering wheel. )

 

Well, is your steering wheel off center when on the hwy? If so, it might be a contributing factor. I am obsessive with how centered the wheel is, even if it's 5 degrees off center it drives me nuts.

Just to add, when I go over bumps on a straight road, the s-awc also indicates ayc activity.

 

No, the wheel is centered as I'm driving. Over some bumps I could understand, that would make sense. This is almost all the time as soon as I'm over about 50 MPH and it stays until I slow down...

 

And it's the AYC indicator, not the ACD?

 

Every time this has happened with me, it was due to a tire losing air, flat, or unbalanced

 

just had a quick question anyone knows if this screen is not showing any change what might be broken or failing ?

 

An English teacher just killed a kitten.

edit: if the display is showing nothing but the outline, then the entire system is shut off. If it shows the center and side bars, but they never move, then try a different mode.

 

Wanted to thank everyone for their input. I was hesitant to to the X to the dealer at the time because I was in the process of getting my wheels powder coated and tires replaced. Long story short got wheels back and new Cooper RS3's and the issue is gone! Def don't think it was low tire pressure because I never had a light. Possibly unbalanced tires or maybe even the fact that there were mis matched tires from when I purchased it. Once again thanks for all the input/suggestions and hopefully this can help someone down the line!