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Old May 28, 2010 | 05:04 PM
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Default Traction system active displayed
Ever since I got a new set of Potenza RE-11s installed and a racier alignment, between 45 and 55 miles/hour, the message, "Traction System Active" is displayed. I can reproduce this at will, and in different gears, in a straight line, barely on the throttle. Has anyone experienced this before? Anyone have any ideas what could be causing this?


---Matthew Hicks
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Old May 28, 2010 | 05:45 PM
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What do you mean by "a racier alignment" exactly? Does it happen at 45-55 mph and up? Or just between 45-55 mph?
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Old May 28, 2010 | 06:39 PM
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Sounds like you may have a mismatch on tire sizes. The computer is reading your front tires as moving slower than the back tires and trying to compensate.
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Old May 28, 2010 | 07:16 PM
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Originally Posted by filmjay
What do you mean by "a racier alignment" exactly? Does it happen at 45-55 mph and up? Or just between 45-55 mph?

More negative camber and some toe in. I think it happens only between these speeds, but I am going to recheck.


---Matthew Hicks
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Old May 28, 2010 | 07:32 PM
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As already stated...you have a mismatch in the tire size. The alignment won't cause that.
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Old May 28, 2010 | 07:35 PM
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Originally Posted by haljensen
Sounds like you may have a mismatch on tire sizes. The computer is reading your front tires as moving slower than the back tires and trying to compensate.

Duh. How did I not think of this. Doing the math, I went from tire diameters (f/r, inches) 21.86/22.93 to 22.33/22.60. Does anyone know if I can use my HP Tuners to reprogram the correct sizes in the cars computer?


---Matthew Hicks
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Old May 28, 2010 | 07:46 PM
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HPTuners will only allow you to do a speedo correction. You will need to get a taller rear tire.
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Old May 28, 2010 | 07:56 PM
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Originally Posted by n77nxc
HPTuners will only allow you to do a speedo correction. You will need to get a taller rear tire.
Screw that, I'll just make sure to turn TC off every time I get in the car. I'm not giving my RE11s up and they don't make anything taller for the rear.


---Matthew Hicks
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Old May 29, 2010 | 12:24 AM
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Originally Posted by FireFalcon
Screw that, I'll just make sure to turn TC off every time I get in the car. I'm not giving my RE11s up and they don't make anything taller for the rear.


---Matthew Hicks
www.firefalcon.com
Trade for a smaller front tire?
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Old May 29, 2010 | 12:55 AM
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Originally Posted by FireFalcon
Duh. How did I not think of this. Doing the math, I went from tire diameters (f/r, inches) 21.86/22.93 to 22.33/22.60. Does anyone know if I can use my HP Tuners to reprogram the correct sizes in the cars computer?


---Matthew Hicks
www.firefalcon.com
Your tire diameters look wrong, try this link;

http://www.1010tires.com/TireSizeCalculator.asp
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Old May 29, 2010 | 07:52 PM
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Originally Posted by haljensen
Your tire diameters look wrong, try this link;

http://www.1010tires.com/TireSizeCalculator.asp
Yeah, I forgot to double the value for sidewall height before adding it to the diameter. So much for quickie tire size spreadsheet. The point still remains that I increased the size of the front tires relative to the rears and that is causing my problems.


---Matthew Hicks
www.firefalcon.com
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