TOYOTA 2013 Prius PHV - Manual (Page 387)

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2-4. Using other driving systems
PRIUS PHV_OM_OM47787U_(U)
2
When
d
riving
Approach warning
When your vehicle is too close to a vehicle ahead, and sufficient
automatic deceleration via the cruise control is not possible, the dis-
play will flash and the buzzer will sound to alert the driver. An exam-
ple of this would be if another driver cuts in front of you while you are
following a vehicle. Apply the brakes to ensure an appropriate vehi-
cle-to-vehicle distance.
■
Warnings may not occur when
In the following instances, there is a possibility that the warnings
will not occur:
● When the speed of the vehicle ahead matches or exceeds your
vehicle speed
● When the vehicle ahead is traveling at an extremely slow speed
● Immediately after the cruise control speed was set
● At the instant the accelerator is applied