cruise control TOYOTA PRIUS PLUS 2012 User Guide

280
2-4. Using other driving systems
PRIUS +_OM_OM47821E_(EE)
Dynamic radar cruise control
: If equipped
Dynamic radar cruise control supplements conventional cruise con-
trol with a vehicle-to-vehicle distance 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
Indicators
Set speed
Display
Cruise control switch

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When driving
PRIUS +_OM_OM47821E_(EE)
Setting the vehicle speed (vehicle-to-vehicle distance con-
trol mode)
Press the “ON-OFF” button to
activate the cruise control.
Radar cruise control indicator
will come on.
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.
“SET” indicator will come on.
The vehicle speed at the
moment the lever is released
becomes the set speed.
STEP 1
STEP 2

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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 40 km/h
(25 mph).

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When driving
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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
Selecting conventional constant speed control mode
Constant speed control mode differs from vehicle-to-vehicle distance
control mode. When constant speed mode is selected, your vehicle
will maintain a set speed regardless of whether or not there are other
vehicles in the lane ahead.

288 2-4. Using other driving systems
PRIUS +_OM_OM47821E_(EE)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 1 sec-
ond.)
Cruise control indicator will come
on.
When in constant speed control
mode, to return to vehicle-to-vehi-
cle distance control mode, push
the lever forward again and hold
for approximately 1 second.
After the desired speed has been
set, it is not possible to return to
vehicle-to-vehicle distance con-
trol mode.
If the “POWER” switch is turned
off and then turned to ON mode
again, the vehicle will automati-
cally return to vehicle-to-vehicle
distance control mode.
Adjusting the speed setting:
P. 282
Canceling and resuming the
speed setting: P. 284

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When driving
PRIUS +_OM_OM47821E_(EE)
Dynamic radar cruise control can be set when
The shift position is in D.
Vehicle speed is above approximately 50 km/h (30 mph).
Set speed
Depending on vehicle conditions and the driving environment, it may not be
possible to maintain the set speed.
Accelerating after setting the vehicle speed
The vehicle can accelerate normally. After acceleration, the set speed
resumes. However, during vehicle-to-vehicle distance control mode, the
vehicle speed may decrease below the set speed in order to maintain the
distance to the vehicle ahead.
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.

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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.
Radar sensor and grille cover
Always keep the sensor and grille cover clean to ensure that the vehicle-to-
vehicle distance control operates properly. (Some obstructions, such as
snow, ice and plastic objects, cannot be detected by the obstruction sensor.)
Dynamic radar cruise control (vehicle-to-vehicle distance control mode) will
be canceled if dirt is detected. (Constant speed control mode can be used).
Grille cover
Radar sensor

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Warning lights, warning code and buzzers for dynamic radar cruise
control
Warning lights, warning code and buzzers are used to indicate a system
malfunction or to inform the driver of the need for caution while driving.
The warning codes displayed on the meter indicate the following situations.
Fix each problem in accordance with the correction procedure, and check
that the system is operating normally.
If the warning code persists even after fixing, have the vehicle inspected by
any authorized Toyota dealer or repairer, or another duly qualified and
equipped professional.
Warning code/
warning lightDetailsCorrection procedure
(yellow)Indicates that the radar
cruise control sensor is
dirty or covered with
ice.Clean the sensor.
(yellow)Indicates that the radar
cruise control system is
unable to judge vehi-
cle-to-vehicle distance.If the windshield wip-
ers are on, turn them
off or set them to either
the intermittent or the
slow mode.
(yellow)Indicates a malfunction
in the radar cruise con-
trol system.Press the “ON-OFF”
button once to deacti-
vate the system, and
then press the button
again to reactivate the
system.

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CAUTION
Before using dynamic radar cruise control
Do not overly rely on vehicle-to-vehicle distance control.
Be aware of the set speed. If automatic deceleration/acceleration is not
appropriate, adjust the vehicle speed, as well as the distance between your
vehicle and vehicles ahead by applying the brakes etc.
Cautions regarding the driving assist systems
Observe the following precautions.
Failure to do so may cause an accident resulting in death or serious injury.
Assisting the driver to measure following distance
The dynamic radar cruise control is only intended to help the driver in
determining the following distance between the driver’s own vehicle and a
designated vehicle traveling ahead. It is not a mechanism that allows care-
less or inattentive driving, and it is not a system that can assist the driver in
low-visibility conditions. It is still necessary for driver to pay close attention
to the vehicle’s surroundings.
Assisting the driver to judge proper following distance
The dynamic radar cruise control determines whether the following dis-
tance between the driver’s own vehicle and a designated vehicle traveling
ahead is appropriate or not. It is not capable of making any other type of
judgement. Therefore, it is absolutely necessary for the driver to remain
vigilant and to determine whether or not there is a possibility of danger in
any given situation.
Assisting the driver to operate the vehicle
The dynamic radar cruise control has no capability to prevent or avoid a
collision with a vehicle traveling ahead. Therefore, if there is ever any dan-
ger, the driver must take immediate and direct control of the vehicle and
act appropriately in order to ensure the safety of all involved.

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CAUTION
To avoid inadvertent cruise control activation
Switch the cruise control off using the “ON-OFF” button when not in use.
Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an acci-
dent resulting in death or serious injury.
In heavy traffic
On roads with sharp bends
On winding roads
On slippery roads, such as those covered with rain, ice or snow
On steep downhills, or where there are sudden changes between sharp up
and down gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
At entrances to expressways
When weather conditions are bad enough that they may prevent the sen-
sors from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
When an approach warning buzzer is heard often
During emergency towing