Traction control light comes even when not hard cornering?

[SmsAlSuwaidi]

Shouldn't be an issue, you have to remember hwen you stretch tires the car won't feel right and when you change lanes you will feel the car pulling you to one side or the other ( the lane you were on or the lane you are going to)
I had 215s on my 9.5's, and when anybody would drive my car he would go "WTF"

Another culprit could be toe, are you sure it's zeroed out?

[mav1178]

Originally Posted by mwjcyber

Why do people do the pedal dance when you can just hold the stability control button down for more than 3 seconds to get the same results? Maybe like to dance with your car?

Because the system isn't completely off, traction control is still slightly on and will engage when the car is at the limit.

Pedal dance is great to isolate problems or drive your car with ABS on but without all the nannies. It will only reset the next time you crank the car.

-alex

[stugray]

Originally Posted by Yamajee

Hmmm,
I'm running 255/35 for rears and 225/40 for the fronts, is this the issue?

The '35' and the '40' in the numbers above are what tell you the sidewall aspect ratio
The '255' & '225' are the widths, and everyone knows the 18 is the inner diameter.

So your tires are different outer diameters, but not by much.
Your fronts are 18 inches (457 mm) + 2*(.40*225)= 637mm
Your rears are 18 inches (457mm) + 2*(.35*255)=635.5mm
I doubt that is your problem....

[zlegend]

also make sure the tires are on the right way some tires are directional
its always good to check that.

[zlegend]

Originally Posted by Yamajee

Mine would do the same thing but wouldn't wobble at all, the steering wheel would feel just fine when turning but the traction light comes on and that annoying ABS sound and braking happens. I will check on the front suspension though, the wobble I was mentioning is when overtaking in terms of the steering wheel trying to force itself to go back to the middle or when trying to corner had/semi-hard the rear feels wobbly as in I know the car used to be much more better at being stable when cornering and not feel a bit wobbly in the rear.

yeah i would look around and see if anything is damage if it is still happening then bring it to the dealer or a shop that know what there doing.

[kuhlka]

You don't multiply by two according to TireRack.
225 x 0.40 = 90mm
255 x 0.35 = 89.25mm
So that's a difference of 0.75mm.

That's assuming they aren't stretched or otherwise out of standard spec. He says the rears are 11". The 255 is a 10" tire, so that's definitely stretched. Front is 9.5", but the front tires are 8.85", so those are stretched too. I'm leaning toward the tires not being a close enough diameter due to the stretch.

Another possibility is maybe the DTC/ABS cable is getting rubbed.

[stugray]

Originally Posted by kuhlka

You don't multiply by two according to TireRack..

Ah... you are correct.
I thought the result was for one sidewall height, and it is for both.

[Yamajee]

Originally Posted by SmsAlSuwaidi

Shouldn't be an issue, you have to remember hwen you stretch tires the car won't feel right and when you change lanes you will feel the car pulling you to one side or the other ( the lane you were on or the lane you are going to)
I had 215s on my 9.5's, and when anybody would drive my car he would go "WTF"

Another culprit could be toe, are you sure it's zeroed out?

I have felt that stretch grip reduction in my previous setup I was stretching all 4 tires but no matter what I did traction control wouldn't come on and when it did it was because it was a very very hard corner and it would just come up once and that's it.

Toe is 0 that's the first thing I checked, I remember a friend had some issues with stability and it turned out to be a toe issue so toe isn't an issue for me. Thanks SMS.

Originally Posted by mav1178

Because the system isn't completely off, traction control is still slightly on and will engage when the car is at the limit.

Pedal dance is great to isolate problems or drive your car with ABS on but without all the nannies. It will only reset the next time you crank the car.

-alex

So pedal dance is slightly different than holding the button for 3 seconds?

Originally Posted by stugray

The '35' and the '40' in the numbers above are what tell you the sidewall aspect ratio
The '255' & '225' are the widths, and everyone knows the 18 is the inner diameter.

So your tires are different outer diameters, but not by much.
Your fronts are 18 inches (457 mm) + 2*(.40*225)= 637mm
Your rears are 18 inches (457mm) + 2*(.35*255)=635.5mm
I doubt that is your problem....

Still, I'll check on the tires and have them swapped to bigger tires then if the issue still remains, then my best guess would be the steering rack.

Originally Posted by zlegend

yeah i would look around and see if anything is damage if it is still happening then bring it to the dealer or a shop that know what there doing.

Yep, gonna do that today hopefully.

Originally Posted by kuhlka

You don't multiply by two according to TireRack.
225 x 0.40 = 90mm
255 x 0.35 = 89.25mm
So that's a difference of 0.75mm.

That's assuming they aren't stretched or otherwise out of standard spec. He says the rears are 11". The 255 is a 10" tire, so that's definitely stretched. Front is 9.5", but the front tires are 8.85", so those are stretched too. I'm leaning toward the tires not being a close enough diameter due to the stretch.

Another possibility is maybe the DTC/ABS cable is getting rubbed.

Hmmm, that helps a lot! let's see if it turns out to be the front tires today and I'll let you guys know.


Any idea where that cable is located?


Again, thank you all for the help!

[wheelhaus]

Holding the Trac OFF button for 3-5 sec will disable traction control 100%, and vehicle stability control about 98%, but leaves ABS active. If the car is under certain conditions (such as really aggressive track driving and trail braking over rumble strips) the CPU will still intervene a bit.

For you, holding the button for 5 sec to turn everything "off" should be sufficient. It's good enough to go drifting or hooning around in a street car.

The reason for you to do the pedal dance, is if the system continues to intervene when turned "off" by holding the button. In this case, the pedal dance will completely disable the system entirely (except ABS is left on). This will let you drive the car by itself to see if it's doing anything strange mechanically, or if the CPU is causing it.

If the CPU is indeed the problem, the next step is to determine if the CPU (or it's sensors) are actually bad, or if your mechanical setup is simply causing the CPU to intervene excessively.

[Yamajee]

Problem is 80% fixed!

After a long day of zero'ing out toe, checking the steering rack, checking suspension and components for anything and then looking for tires that would measure the same in height in the front as to the rears... the toe didn't solve the issue even though it's 0, steering rack completely fine, suspension and components fully fine. Tire sizes... here was the problem, couldn't find anything that would be fit in the front bigger than 225/40 as rubbing was an issue plus it was very very hard to find anything bigger in that size around the area I was in.. then 2 hours later me and a friend had an idea where deflating the tires to get the same difference in height would happen, we measured the differences before and the difference was 1MM believe it or not! all tires were on 40 PSI, deflated the rears to 32 PSI and the fronts to 30 PSI, BAM, 80% of the problem is gone, it would still do the traction thing at verrrry hard cornering and would feel a bit wobbly when steering at verrry hard corners but overall I'm much much happier than what I had two days ago. Till then, this is the temporary solution until my tire guy gets me the sizes that are appropriate, any tire sizes recommendations are welcome!

[Opie]

Different tire sizes (circumference) front & rear will cause this...

[jdubz13frs]

Guys, yes tire diameters different front and rear will cause this issue. however, OP indicated 225/40R18 front (25.1" dia) and 255/35R18 rear (25" dia). This should not be an issue, the computer is not going to pick up .1" difference. The answer lies in the heart of the stability system itself. When you align one of these modern vehicles, they have a steering wheel position sensor. If you change toe more than just a nudge, the sensor has to be re-learned to center. If not, you will get these issues. I run a shop specializing in alignments and this has been an issue for us. I'm not sure the procedure for the twins, but I am going to check my alignment machine and let you know.

[jdubz13frs]

Looks like you need a techstream or comparable diagnostic computer to perform "VSC sensor neutralization". That would be where I'm leaning.