TOYOTA 2013 Prius PHV - Manual (Page 404)

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2-4. Using other driving systems
PRIUS PHV_OM_OM47787U_(U)
Disabling pre-collision braking
Pre-collision braking enabled
Pre-collision braking disabled
The “PCS” warning light will
turn on when pre-collision
braking is disabled.
Radar sensor
The radar sensor detects vehi-
cles or other obstacles on or
near the road ahead and deter-
mines whether a collision is
imminent based on the position,
speed, and heading of the obsta-
cles.