Get When driving -> Dynamic radar cruise control Guide for Toyota Prius 4 Door Third Generation (2010-2015)

2-4. Using ot her driving syst em s



Dynamic radar cruise control

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

Display

Set speed

Indicators

Cruise control switch

: If equipped

270

2-4. Using other driving systems

■ Setting the vehicle speed (vehicle-to-vehicle distance con-

trol mode)

Press the “ON-OFF” button to

STEP

1

activate the cruise control.

Radar cruise control indicator

will come on.

Press the button again to

deactivate the cruise control.

2

Accelerate or decelerate the

vehicle to the desired speed,

and push the lever down to set

the speed.

STEP

2

“SET” indicator will come on.

The vehicle speed at the

moment the lever is released

becomes the set speed.

271

2-4. Using other driving systems

■ 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.

ITO24P126

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. 278), 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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2-4. Using other driving systems

■ Changing the vehicle-to-vehicle distance

Pressing the button changes

the vehicle-to-vehicle dis-

tance as follows:

Preceding vehicle mark

Long

Medium

Short

2

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.

■ Vehicle-to-vehicle distance settings

Select a distance from the table below. Note that the distances

shown correspond to a vehicle speed of 50 mph (80 km/h). Vehi-

cle-to-vehicle distance increases/decreases in accordance with

vehicle speed.

Distance options

Long

Vehicle-to-vehicle distance

Approximately 160 ft. (50 m)

Approximately 130 ft. (40 m)

Approximately 100 ft. (30 m)

Medium

Short

273

2-4. Using other driving systems

■ 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.

ITO24P127

Resuming is available when

the vehicle speed is more

than approximately 25 mph

(40 km/h).

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2-4. Using other driving systems

Driving in vehicle-to-vehicle distance control mode

This mode employs a radar sensor to detect the presence of vehicles

up to approximately 400 ft. (120 m) ahead, determines the current

vehicle-to-vehicle following distance, and operates to maintain a suit-

able following distance from the vehicle ahead.

Note that vehicle-to-vehicle distance will close in when traveling on long

downhill slopes.

2

275

2-4. Using other driving systems

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 driving 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 vehicles ahead driving slower than

the set speed

The system accelerates until the set speed is reached. The system then

returns to constant speed cruising.

276

2-4. Using other driving systems

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.

2

■ 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

277

2-4. Using other driving systems

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.

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.

278

2-4. Using other driving systems

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. 272

Canceling and resuming the

speed setting: P. 274

2

■Dynamic radar cruise control can be set when

●The shift position is in D.

●Vehicle speed is above approximately 30 mph (50 km/h).

■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.

■Set speed

The set speed may be unsustainable depending on driving circumstances.

279

2-4. Using other driving systems

■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 25 mph (40 km/h).

●Enhanced 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 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 your Toyota

dealer.

■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 10 mph (16 km/h)

below the set vehicle speed.

At this time, the memorized set speed is not retained.

●Vehicle speed falls below approximately 25 mph (40 km/h).

●Enhanced 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

280

2-4. Using other driving systems

■Warning lights, messages and buzzers for dynamic radar cruise con-

trol

Warning lights, warning messages and buzzers are used to indicate a sys-

tem malfunction or to inform the driver of the need for caution while driving.

■Certification

For vehicles sold in the U.S.A.

FCC ID: HYQDNMWR004

This device complies with part 15 of the FCC Rules. Operation is subject to

the following two conditions: (1) This device may not cause harmful interfer-

ence, and (2) this device must accept any interference received, including

interference that may cause undesired operation.

2

FCC WARNING

Changes or modifications not expressly approved by the party responsible

for compliance could void the user’s authority to operate the equipment.

Radiofrequency radiation exposure Information:

This equipment complies with FCC radiation exposure limits set forth for an

uncontrolled environment.

This equipment should be installed and operated with minimum distance of

20 cm between the radiator (antenna) and your body.

This transmitter must not be co-located or operating in conjunction with any

other antenna or transmitter.

For vehicles sold in Canada

Operation is subject to the following two conditions: (1) this device may not

cause interference, and (2) this device must accept any interference, includ-

ing interference that may cause undesired operation of the device.

281

2-4. Using other driving systems

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.

282

2-4. Using other driving systems

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.

2

●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

283

2-4. Using other driving systems

CAUTION

■When the sensor may not be correctly detecting the vehicle ahead

Apply the brakes as necessary when any of the following types of vehicles

are in front of you.

As the sensor may not be able to correctly detect these types of vehicles,

the approach warning (P. 277) will not be activated, and a fatal or serious

accident may result.

●Vehicles that cut in suddenly

●Vehicles traveling at low speeds

●Vehicles that are not moving

●Vehicles with small rear ends (trailers with no load on board etc.)

●Motorcycles traveling in the same lane

■Conditions under which the vehicle-to-vehicle distance control may

not function correctly

Apply the brakes as necessary in the following conditions as the radar sen-

sor may not be able to correctly detect vehicles ahead, and a fatal or serious

accident may result:

●When water or snow thrown up by the surrounding vehicles hinders the

functioning of the sensor

●When your vehicle is pointing upwards (caused by a heavy load in the lug-

gage compartment etc.)

●When the road curves or when the lanes are narrow

●When steering wheel operation or your position in the lane is unstable

●When the vehicle ahead of you decelerates suddenly

284

2-4. Using other driving systems

CAUTION

■Handling the radar sensor

Observe the following to ensure the cruise control system can function effec-

tively.

Otherwise, the system may not function correctly and could result in an acci-

dent.

●Keep the sensor and grille cover clean at all times.

Clean the sensor and grille cover with a soft cloth so you do not mark or

damage them.

2

●Do not subject the sensor or surrounding area to a strong impact.

If the sensor has moved out of position, the system may malfunction or

operate incorrectly. If the sensor or surrounding area is subject to a strong

impact, always have the area inspected and adjusted by a Toyota dealer.

●Do not disassemble the sensor.

●Do not attach accessories or stickers to the sensor, grille cover or sur-

rounding area.

●Do not modify or paint the sensor and grille cover.

●Do not replace them with non-genuine parts.

285

When driving -> Dynamic radar cruise control for Your Toyota Prius 4 Door Third Generation (2010-2015)

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