tire size activates the traction control???
Thread Starter
Instructor
Joined: Aug 2004
Posts: 139
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From: statesboro ga
tire size activates the traction control???
I have toyo 35x18s on the back and 40x18 on the front. would this tire size combination cause my traction control to kick on at about 40-50mph??I thought I read one time that it may cause this to happen. I have to drive around with my traction off so is there any fixes to this besides new size tires...
Safety Car
Joined: Aug 2000
Posts: 4,933
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From: San Rafael CA
Yes, having a larger (taller) tire on the front is the opposite of what the EBCM expects. The car is delivered with larger tires on the rear, so the EBCM expects to see the rear tires turning SLOWER than the fronts .... when it sees the rear tires spinning FASTER than the front tires it assumes the rear tires have lost grip and will intervene to bring rear wheel speed back into "normal" range.
Either change your tire set-up, or live with no Traction Control.
Either change your tire set-up, or live with no Traction Control.
Team Owner
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From: Miami Beach FL
Tech Contributor
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From: Charlotte, NC (formerly Endicott, NY)
Drifting
Joined: Nov 2001
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From: Lincoln Nebraska
As far as the traction control you will always have that if the front tire is larger (circumference or height) is greater than the rears, there is no reprogramming to fix that, all you can do is as already stated and turn traction control off and live with it......or change tire sizes to make the fronts smaller than the rears again (as when it was stock)
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Race Director
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
It does absolutely nothing for the traction control system...the "brains" of which are in a totally separate module.
Tech Contributor
Joined: Dec 2006
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From: Van Buren Arkansas
Wounded Warrior Escort '11
I'll take your word for it. I thought that information was used for the EBTCM as well.
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
The PCM only controls the powertrain. The EBTCM measures wheel speeds based on hard wired expected frequencies from the wheel speed sensors.
Bill
Bill
Last edited by Bill Dearborn; Apr 11, 2008 at 11:23 PM.