I went out today to a Callaway demo at a golf course about 40 miles away. Almost all of the driving was on parkway and interstate roads. So I'm on the interstate doing 70 mph with the CC on and as usual the top down. It is 72* here today so out we go. I then drove over a bump (where the concrete lifted) and the car dropped out of cruise. So I re-engaged the CC and continued and about 3-4 miles later the same thing happened as I hit a similar bump. Put it back into CC and got to the demo. About an hour later we started back and about 10 miles away on the same interstate I did the same thing. After re-setting the CC everything was normal . 1st time this happened and I use CC pretty much every time I am out. Anyone had this experience.

 

I've heard one or two people say their cruise disengaged when going over a bump. Do you you have standard cruise or adaptive?

 

Just the standard CC.

 

I don't recall anyone coming up with a definitive conclusion or a fix. My only guess would be: the shock of the bump moves the brake pedal slightly, or disturbs the braking system in some other way, so the car thinks you've touched the brake and kills cruise. I suppose cruise has to be somewhat failsafe - better that it disengages at the slightest brake pressure than fails to disengage fast enough when you need it to.

 

Mine has done it before.. only after a good bump. I heard this in a review. Small price to pay for the best car ever made im biased of course

 

The traction control will disengage the cruise control as well. Maybe the bump is enough to allow one wheel to momentarily lose traction.

 

Yeah, that makes more sense - any detected difference in rotation between the rear wheels is going to trigger DSC.

 

For sure, as soon as the car detect a slippery road or anything regarding the stability control, CC will automatically disengage. That can happen on a bump because a wheel can slip for a nano second and disengage the CC.
Guy