Toyota Highlander 2020 Owner's Manual page 292

292
4-5. Using the driving support systems
System overview
If the Parking Support Brake determines that a collision with a
detected object is possible, the engine output will be restricted to
restrain any increase in the vehicle speed. (Engine output restriction
control: See figure 2.)
Additionally, if the accelerator pedal continues to be depressed, the
brakes will be applied automatically to reduce the vehicle speed.
(Brake control: See figure 3.)
 Figure 1 When the PKSB (Parking Support Brake) is disabled
Engine output
Braking force
Time
 Figure 2 When engine output restriction control operates
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