Strange BlueCruise event

[calicojack]

Owned for a little over a year, ~13K miles. Yesterday, I got caught in some stop-and-go traffic, which is normally not an issue. This time though, the car came to almost a complete stop but kept veeerrrry slowly rolling, like an inch or two per minute. Almost not noticeable. After 1-2 seconds of this, the car shut down BlueCruise and put on the parking brake. Adaptive cruise was disabled after that until I power cycled the vehicle. This is the first time this has happened, so I am treating it as an isolated event for now.

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[Wizrd54]

I had the same issue when using ACC, not Blue Cruise. I was on a very slight downhill grade when it happened, when I was stopped at a light. The brakes and/or motor control don't seem to estimate the stopping force required. The radar realizes the vehicle is getting too close to the vehicle in front so it sets a fault and applies the parking brake as the failure mode to stop the vehicle from rolling. Cruise was not available again until I did a key cycle.

 

[calicojack]

That makes sense! I was on a slight downhill grade as well!

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