abs light and Brake light go on with stock tires.

[grahamce]

I have a Trinity T-1000.

2007 GMC GMT-900 Sierra 4x4 w/ 5.3L

I searched the forums, and this seems to be a common problem.

When I load either the diablo tune, or the 87 octane tune my ABS light and Brake light (!) goes on. I run stock tires (265/70 17). The stock tune does not cause this issue.

I have tried to manually set the tire size in the tuner to the proper size and the lights will go on even sooner then if I hadn't entered the tire size at all.

I have the latest update v.1r07e.

Is there a fix for this?

[mikel]

so, you are not adjustng anything in the tire size or gear ratio settings, correct?

[grahamce]

Correct. I do not adjust anything, just load the tune provided. The abs light and brake light goes on in about 3-4 hours of driving.

Both 87 octane tune, and Diablo tune cause the lights to go on. Stock tune does not have this problem.

When I do adjust the tire size, the abs light goes on after about 1-2 minutes of driving.

so, you are not adjustng anything in the tire size or gear ratio settings, correct?

[mikel]

can you post the last tune written and original backup please?

[grahamce]

can you post the last tune written and original backup please?

[johan]

Both of those files looked stock, attached here are redone files , please let me know if either throw the abs light for you.
I made you 93 and 87 just in case.

[grahamce]

Both of those files looked stock, attached here are redone files , please let me know if either throw the abs light for you.
I made you 93 and 87 just in case.

I loaded the modified 93 tune and the ABS light and brake light are still going on.

The new tune caused the lights to go on after about 3 minutes of driving.

The default diablo 93 tune takes about 15 minutes now to trip the ABS and brake lights.

The stock tune does not trip the ABS/Brake lights (I just double checked)

[grahamce]

Hi Mike.

As per our conversation.

Attached is the default diablo 93 tune with the adjustment I made for 265 70/17 tires.

When I entered this tune, my brake pedal started to vibrate, I couldn't stop quickly and rolled past the stop sign. Just a heads up.

[mitties]

I had same problem with the same truck except with the predator tuner. Only thing I modified in the tune was I turned DOD off and set speed limiter 1 to 120 mph and my abs and brake lights haven't came on since.