Toyota PRIUS Manual page 367

Automatic cancelation of vehicle-to-vehicle distance control

Vehicle-to-vehicle distance control driving is automatically canceled in the
following situations:
 Actual vehicle speed falls below approximately 40 km/h (25 mph).
 VSC+ is activated.
 The sensor cannot operate correctly because it is covered in some way.
The windshield wipers are operating at high speed (when the wiper

switch is set to the "AUTO" mode or the high speed windshield wiper
operation position).
If vehicle-to-vehicle distance control driving is automatically canceled for any
other reason, there may be a malfunction in the system. Contact any autho-
rized Toyota dealer or repairer, or another duly qualified and equipped pro-
fessional.
 Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following sit-
uations:
 Actual vehicle speed is more than approximately 16 km/h (10 mph)
below the set vehicle speed.
At this time, the memorized set speed is not retained.
 Vehicle speed falls below approximately 40 km/h (25 mph).
 VSC+ is activated.
PRIUS PHV_OM_OM47831E_(EE)
2-4. Using other driving systems
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