[andi999]

2 Processors? What happens with majority vote if they disagree? (or maybe they wanted to avoid a 'minority report' situation :-)). But honestly do you know what they do? Although since it is not flying, probably some red indicator will light up. And maybe a stopping maneuver.

[icebraining]

Apparently they just try again:

"Each chip makes its own assessment of what the car should do next. The computer compares the two assessments, and if the chips agree, the car takes the action. If the chips disagree, the car just throws away that frame of video data and tries again, Venkataramanan said."

[pmorici]

The self driving computer was discussed in some detail at their 2019 Autonomy Day event.

https://youtu.be/Ucp0TTmvqOE?t=4244