rszane

Had another track day at Circuit of the Americas today, but it didn't go well. Mine is a '14 A6 Z51 Vert (bone stock) and it has been a wonderful track beast. I have experienced what others have in the past, transmission overheating after 12-15 minutes of aggressive track time. I wasn't expecting to have that difficulty today as it was nice and cool outside, and didn't -- but had a new problem. After a few hot laps, the braking system actuated and forced me to stop. No warnings or indicators on the DIC, no overheating, no smoke or smell, no leaks. After a full stop, the car would allow me to drive for 20 meters before applying the brakes again to a complete stop. Over and over this occurred, no matter what driving mode I chose, automatic or manual. Multiple restarts had no effect. I called the folks over at Austin's Corvette World, and their techs had never heard of this problem in the C7 or any other car. I trailered the car over to the dealer and left it there, but they won't have a look at it until Monday. Anyone have any thoughts?

ZL-1

Are there any mods at all? Any change in tires? Weird that there are no warning messages displayed ...

rszane

Nope. No mods, original tires (although after this track day I was going to need a new set). No warnings or messages. My dealer did an oil change and the tech inspection earlier this week.

ben dover

Wild-*** guess is it's wheel speed sensor related. Let us know.

Gary '09 C6

^ I was thinking the same.

DLC7

Some may find this scary, or exciting. Thats a thought, Matter of fact, the first one.

Skid Row Joe

Hmmmmm.......

Vetteman Jack

Will be interesting to hear what the shop finds out.

WelderGuy

The shop guys are going to have a blast recreating the problem.

Could you tell if it was one particular brake or all four brakes being activated?

savage

does your z51 car also have the mag-ride?, PTM could be acting up or on wrong setting. im sure you played with that when this happened=turned it off.

rszane

Yes, Mag Ride equipped. I tried every mode/every setting to no avail. I could not tell how many wheels were braking, but the brakes are applied firmly to a stop. The techs won't have any trouble replicating the problem, I had several drivers and the track mechanic try to drive it, and every 20 meters...

pcguy2u

Did you feel the wheels for any temperature differential?

Ernest_T

Wouldn't a sensor malfunction throw a code?

rszane

Yes, felt the wheels and rotors but in the short span of 20 meters we couldn't perceive a difference. I agree that active handling is the likely culprit as it is designed to apply the brakes to keep the car balanced in high speed turns and would not show any warnings during normal activation. However, this is clearly not normal activation. If a wheel speed or other sensor failed, would there not be an indicator to the driver?

4XLR8N

S/C 5.0

Sorry about your problem. I have not had that happen. Can you please let me know how you go about getting on the Circuit of the Americas track. I also live in Austin Thank you very much

lastcowboy

did you have all the nannies off or on ? because it sounds like the anti-locking brake system or the active /h .

rszane

When the event first occurred, I was at speed in Track Mode, with the Performance Traction Management set at Sport 1. That means Active Handling was ON. After it first occurred, I tried every other mode including all PTM options with the same result.

S/C 5.0, I sent you a PM with the info you requested.

silky1

+1 for info on how to get on track at COTA.

Rakkasan

I didn't think they allowed verts on a track.