programming speed sensor after installing 40" tires?

[guruerror]

That's weird...I've had 37s and 4.56s for several years with the ECM programmed for such and I've never had the ABS light come on once? Of course...you've got the DMax, so that prolly throws a bit of a curve in there...hmmm.

I know...this comment is no help at all, sorry. I hope you figure this one out.

[OrangeCrush]

Originally Posted by guruerror

That's weird...I've had 37s and 4.56s for several years with the ECM programmed for such and I've never had the ABS light come on once? Of course...you've got the DMax, so that prolly throws a bit of a curve in there...hmmm.

I know...this comment is no help at all, sorry. I hope you figure this one out.

You're right... no help at all.




Seriously though, apparently I'm making the sensors reach their limits and thus turning on this stupid light. Doesn't happen until I'm on the highway, around town, we're cool.

I'm waiting to hear back from a tuning expert.




Mark

[HUMTECH]

I know on some GM's you can go into the ebcm under the special functions menu and set tire size. Not positive if this can be done on an H3 or not

[Yetti]

40" x 3.1415 = 125.66" / 12" = 10.47166 feet in dia.
take the value and divide 5280'/ 10.471 = 504 rotations per mile
the value the ecu needs is the count per mile. so you have to do a little math.

[OrangeCrush]

Originally Posted by Yetti

40" x 3.1415 = 125.66" / 12" = 10.47166 feet in dia.
take the value and divide 5280'/ 10.471 = 504 rotations per mile
the value the ecu needs is the count per mile. so you have to do a little math.

Yup, I understand the problem, I just can?t find someone to reset the parameters in the ECM.

Mark