MT Radial ABS/TC codes

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May 13, 2014 | 04:23 PM

sr20dime

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Racer

Joined: Aug 2013

Posts: 340

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St. Jude Donor '15

MT Radial ABS/TC codes

Hi Everyone,

I have a 2013 427 vert that we put the 305/35/20 MT Radial II's on. Unfortunately, it pulses the ABS and give all the Traction Control and ABS codes after a couple minutes of driving. I was wondering if anyone had experience getting rid of the codes. I looked into different tire sizes up front to help match them but I hate to buy new front tires on a guess that it will fix the issue. Any input?

May 14, 2014 | 02:25 PM

cclive

Team Owner

Joined: Mar 2008

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From: Southern Utah

The front to rear ratio must be preserved in order to keep the computer happy...simple as that..otherwise the car thinks that one set of tires is slipping on the pavement..

May 14, 2014 | 02:39 PM

03venum

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Joined: Jan 2012

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I have been told my my tuner before that the variance can be changed in the tune.

May 23, 2014 | 04:57 PM

sr20dime

Thread Starter

Racer

Joined: Aug 2013

Posts: 340

Likes: 15

St. Jude Donor '15

Quote:

Originally Posted by cclive

The front to rear ratio must be preserved in order to keep the computer happy...simple as that..otherwise the car thinks that one set of tires is slipping on the pavement..

I get that but what is the tolerance?

May 24, 2014 | 01:00 AM

Bill Dearborn

Tech Contributor

Joined: Oct 1999

Posts: 41,058

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From: Charlotte, NC (formerly Endicott, NY)

Quote:

Originally Posted by 03venum

I have been told my my tuner before that the variance can be changed in the tune.

Not true. If he says that stop using him and use somebody else. The EBCM controls ABS, TC and AH. No tuner has access to the EBCM.

Bill

May 24, 2014 | 01:07 AM

Bill Dearborn

Tech Contributor

Joined: Oct 1999

Posts: 41,058

Likes: 9,819

From: Charlotte, NC (formerly Endicott, NY)

Quote:

Originally Posted by sr20dime

You don't say what the codes are. There are about 50 ABS codes so it is a little hard to tell you where to look other than tire size. Ratio from front to rear is 1.04 with the rear tire being 1.04 times larger than the front tire. If you go to large you will get a Engine Drag Control message and if you go to small you will get a Traction Active message along with the EBCM commanding the ECM to cut throttle and if that doesn't work the EBCM will apply the rear brakes trying to slow the rear wheels down.

Bill

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