Or is this basically roll back protection?
SMART STOP TECHNOLOGY™ [SST][3]
Fig. 1
Fig. 2
True street smarts.
SST is included in every new Scion to help reduce engine power when both brake and gas are pressed at the same time under certain conditions.
Scion added the braking system enhancement known as Smart Stop Technology. This advanced technology automatically reduces engine power when both pedals are pressed at the same time under certain conditions.
Smart Stop Technology intervenes when the accelerator is depressed first (Figure 1) and the brakes are applied firmly for longer than one-half second at speeds greater than five miles per hour. (Figure 2)
In normal driving conditions, you won't notice Smart Stop Technology, as it is imperceptible. The feature doesn't engage if the brake pedal is depressed before the accelerator pedal.
This allows time for the driver to move from brake to acceleration when starting on a steep hill to accelerate, helping to avoid rolling backward.
Scion installed Smart Stop Technology in all models starting in 2011, making it one of the first brands to add this braking technology as standard equipment