2010 TOYOTA PRIUS Owners Manual

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PRIUS_U (OM47668U) U.S.A.
CAUTION
■To avoid operating the cruise control by mistake
Keep the “ON-OFF” button off when not in use.
■ Situations unsuitable for cruise control
Do not use cruise control in any of the following situations. 
Doing so may result in control of the vehicle being lost and could cause an
accident resulting in death or serious injury.
● In heavy traffic
● On roads with sharp bends
● On slippery roads, such as those covered with rain, ice or snow
● On steep hills 
Vehicle speed may exceed the set speed when driving down a steep hill.
● On winding roads

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Dynamic radar cruise control
: If equipped
Dynamic radar cruise control supplements conventional cruise con-
trol with a vehicle-to-vehicle dist ance control. In vehicle-to-vehicle
distance control mode, the vehicle automatically accelerates or
decelerates in order to maintain a set following distance from vehi-
cles ahead.
Vehicle-to-vehicle distance
button
Display
Set speed
Indicators
Cruise control switch

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PRIUS_U (OM47668U) U.S.A.
■Setting the vehicle speed (vehicle-to-vehicle distance con-
trol mode)
Press the “ON-OFF” button to
activate the cruise control.
Press the button again to
deactivate the cruise control.
Accelerate or decelerate the
vehicle to the desired speed,
and push the lever down to set
the speed.
Cruise “SET” indicator will
come on.
STEP1
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STEP2

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■Adjusting the set speed
To change the set speed, operate the lever until the desired set
speed is displayed.
Increases the speed
Decreases the speed
Fine adjustment: Momentarily
move the lever in the desired
direction.
Large adjustment: Hold the
lever in the desired direction.
In the vehicle-to-vehicle distance control mode, the set speed will be
increased or decreased as follows:
When the set speed is shown in “MPH”
Fine adjustment: By approximately 1 mph (1.6 km/h) each time the
lever is operated
Large adjustment: By approximately 5 mph (8 km/h) for each 0.75
seconds the lever is held
When the set speed is shown in “km/h”
Fine adjustment: By approximately 0.6 mph (1 km/h) each time the
lever is operated
Large adjustment: By approximately 3.1 mph (5 km/h) for each 0.75
seconds the lever is held
In the constant speed control mode ( P. 224), the set speed will be
increased or decreased as follows:
Fine adjustment: By approximately 1 mph (1.6 km/h) each time the
lever is operated
Large adjustment: The set speed can be increased or decreased con-
tinually until the lever is released.
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PRIUS_U (OM47668U) U.S.A.
■Changing the vehicle -to-vehicle distance
Pressing the button changes
the vehicle-to-vehicle dis-
tance as follows:
Long
Medium
Short
The vehicle-to-vehicle distance
is set automatically to long
mode when the “POWER”
switch is turned to ON mode.
If a vehicle is running ahead of
you, the preceding vehicle
mark will also be displayed.
■Canceling and resuming the speed control
Pulling the lever toward you
cancels the cruise control.
The speed setting is also can-
celed when the brakes are
applied.
Pushing the lever up
resumes the cruise control
and returns vehicle speed
to the set speed.
Resuming is available when
the vehicle speed is more than
approximately 25 mph (40 km/
h).
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Preceding vehicle mark
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Driving in vehicle-to-vehicle distance control modeThis mode employs a sensor to detect the presence of vehicles up to
approximately 400 ft. (120 m) ahead and to judge the distance
between your vehicle and those the vehicle ahead of you.
Note that vehicle-to-vehicle distance will close in when traveling on long
downhill slopes.

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PRIUS_U (OM47668U) U.S.A.Example of constant speed cruising

When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-
vehicle distance can also be set by operating the vehicle-to-vehicle dis-
tance control.
Example of deceleration cruising 
When the vehicle ahead is driving slower than the set speed
When a vehicle is detected running ahead of you, the system automati-
cally decelerates your vehicle. When a greater reduction in vehicle speed
is necessary, the system applies the brakes. A warning tone warns you
when the system cannot decelerate sufficiently to prevent your vehicle
from closing in on the vehicle ahead.
Example of follow-up cruising 
When following a vehicle driv ing slower than the set speed
The system continues follow-up cruising while adjusting for changes in the
speed of the vehicle ahead in order to maintain the vehicle-to-vehicle dis-
tance set by the driver.
Example of acceleration 
When there are no longer any vehi cles ahead driving slower than
the set speed
The system accelerates until the set speed is reached. The system then
returns to constant speed cruising.
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.

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Selecting conventional constant speed control modeDynamic radar cruise control can be used as conventional cruise
control if you select constant speed control mode.
Press the “ON-OFF” button to
activate the cruise control.
Press the button again to deacti-
vate the cruise control.
Switch to constant speed con-
trol mode. 
(Push the lever forward and
hold for approximately one
second.)
Cruise main indicator will come
on.
Adjusting the speed setting:

P. 220
Canceling and resuming the
speed setting: P. 221
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