Get Driving -> Driving assist systems Guide for Toyota 4 Runner SUV Fifth Generation (2010-2024)

322

4-5. Using the driving support systems

Driving assist systems

To keep driving safety and performance, the following systems

operate automatically in response to various driving situations.

Be aware, however, that these systems are supplementary and

should not be relied upon too heavily when operating the vehi-

cle.

◆ ABS (Anti-lock Brake System)

Helps to prevent wheel lock when the brakes are applied suddenly,

or if the brakes are applied while driving on a slippery road surface

◆ Multi Terrain ABS (Anti-lock Brake System) (if equipped)

Helps to prevent wheel lock when the brakes are applied suddenly,

or if the brakes are applied while driving on a slippery road surface,

or in off-road conditions (such as rough roads, sand and mud)

The Multi Terrain ABS operates in synchronization with the Multi-

terrain Select.

◆ Brake assist

Generates an increased level of braking force after the brake pedal

is depressed when the system detects a panic stop situation

◆ VSC (Vehicle Stability Control)

Helps the driver to control skidding when swerving suddenly or

turning on slippery road surfaces

◆ Trailer Sway Control

Helps the driver to control trailer sway by selectively applying brake

pressure for individual wheels and reducing driving torque when

trailer sway is detected.

◆ TRAC (Traction Control)

Helps to maintain drive power and prevent the drive wheels from

spinning when starting the vehicle or accelerating on slippery roads

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4-5. Using the driving support systems

◆ Hill-start assist control

Helps to reduce the backward movement of the vehicle when start-

ing on an uphill

◆ LSD (Limited Slip Differential) (if equipped)

Transfers drive power to the rear tires when front tires spin, and

vice versa, in order to improve traction

◆ KDSS (Kinetic Dynamic Suspension System) (if equipped)

Enhances ride comfort and handling response by using a hydraulic

control system to control the suspension stabilizer bars in response

to road surface and driving conditions during cornering or off-road

driving

When the TRAC/VSC/Trailer Sway Control systems are operating

(2WD models)

4

The slip indicator light will flash

while the TRAC/VSC/Trailer Sway

Control systems are operating.

When the TRAC/VSC/Trailer Sway Control/hill-start assist control

systems are operating (4WD models)

The slip indicator light will flash

while the TRAC/VSC/Trailer Sway

Control/hill-start assist control

systems are operating.

A

buzzer (intermittent) sounds

when the hill-start assist control

system is operating.

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4-5. Using the driving support systems

Disabling the TRAC system (2WD models)

If the vehicle gets stuck in mud, dirt or snow, the TRAC system may

reduce power from the engine to the wheels. Pressing

to turn

the system off may make it easier for you to rock the vehicle in order

to free it.

■ Turning off the TRAC system (turning on the AUTO LSD system:



P. 304)

To turn the TRAC system off,

quickly press and release

.

The VSC OFF and “AUTO LSD”

indicators will come on.

Press

again to turn the

system back on.

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4-5. Using the driving support systems

■ Turning off TRAC, VSC and Trailer Sway Control systems

To turn the TRAC, VSC and

Trailer Sway Control systems

off, press and hold

for

more than 3 seconds while the

vehicle is stopped.

The “TRAC OFF” indicator light

and the VSC OFF indicator light

will come on.

Press

again to turn the

systems back on.

4

Disabling the TRAC system (4WD models)

If the vehicle gets stuck in mud, dirt or snow, the TRAC system may

reduce power from the engine to the wheels. Pressing to turn

the system off may make it easier for you to rock the vehicle in order

to free it.

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4-5. Using the driving support systems

■ Turning off the TRAC system

To turn the TRAC system off,

quickly press and release

.

The “TRAC OFF” indicator light

will come on.

Press

again to turn the

system back on.

■ Turning off TRAC, VSC and Trailer Sway Control systems

To turn the TRAC, VSC and

Trailer Sway Control systems

off, press and hold

for

more than 3 seconds while the

vehicle is stopped.

The “TRAC OFF” indicator light

and the VSC OFF indicator light

will come on.

Press

again to turn the

systems back on.

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4-5. Using the driving support systems

■When the “TRAC OFF” indicator light comes on even if

has not

been pressed

TRAC, hill-start assist control, downhill assist control and crawl control are

temporary deactivated. If the indicator light continues to remain on, contact

your Toyota dealer.

■When the VSC or TRAC system is turned off by pressing the VSC off

switch

On vehicles with pre-collision system, pre-collision brake assist and pre-colli-

sion braking will also be disabled. The PCS warning light will come on and

the message will be shown on the multi-information display. (P. 248)

■Operating conditions of hill-start assist control

When the following conditions are met, the hill-start assist control will operate:

 2WD models

●The shift lever is in a position other than P or N (when starting off forward/

backward on an upward incline)

4

●The vehicle is stopped

●The accelerator pedal is not depressed

●The parking brake is not engaged

 4WD models

●The system has detected that the vehicle is moving backward

●The shift lever is in a position other than P or N (when starting off forward/

backward on an upward incline)

●The brake pedal is not depressed.

●The rear differential is not locked.(if equipped)

■Automatic system cancelation of hill-start assist control (2WD models)

The hill-start assist control will turn off in any of the following situations:

●The shift lever is shifted to P or N

●The accelerator pedal is depressed

●The parking brake is engaged

●2 seconds at maximum elapsed after the brake pedal is released

■When the brake system operates continuously

The brake actuator may overheat. In this case, the TRAC and hill-start assist

control systems will stop operating, a buzzer will sound and the “TRAC OFF”

indicator will come on. Refrain from using the system until the “TRAC OFF”

indicator turns off. (There is no problem with continuing normal driving.)

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4-5. Using the driving support systems

■Sounds and vibrations caused by the ABS, Multi Terrain ABS (if

equipped), brake assist, VSC, Trailer Sway Control, TRAC and hill-start

assist control systems

●A sound may be heard from the engine compartment when the brake pedal

is depressed repeatedly, when the engine is started or just after the vehicle

begins to move. This sound does not indicate that a malfunction has

occurred in any of these systems.

●Any of the following conditions may occur when the above systems are

operating. None of these indicates that a malfunction has occurred.

• Vibrations may be felt through the vehicle body and steering.

• A motor sound may be heard also after the vehicle comes to a stop.

• The brake pedal may pulsate slightly after the ABS or Multi Terrain ABS is

activated.

• The brake pedal may move down slightly after the ABS or Multi Terrain

ABS is activated.

■Automatic reactivation of TRAC, Trailer Sway Control and VSC systems

After turning the TRAC, Trailer Sway Control and VSC systems off, the sys-

tems will be automatically re-enabled in the following situations:

●When the engine switch is turned off

●2WD models: If the AUTO LSD system is turned on, the VSC, TRAC and

Trailer Sway Control systems will turn on when vehicle speed increases

●4WD models: If only the TRAC system is turned off, the TRAC will turn on

when vehicle speed increases

If both the TRAC and VSC systems are turned off, automatic re-enabling will

not occur when vehicle speed increases.

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4-5. Using the driving support systems

WARNING

■The ABS and Multi Terrain ABS do not operate effectively when

●The limits of tire gripping performance have been exceeded (such as

excessively worn tires on a snow covered road).

●The vehicle hydroplanes while driving at high speed on wet or slick roads.

■Stopping distance when the ABS or Multi Terrain ABS is operating may

exceed that of normal conditions

The ABS and Multi Terrain ABS are not designed to shorten the vehicle’s

stopping distance. Always maintain a safe distance from the vehicle in front

of you, especially in the following situations:

●When driving on dirt, gravel or snow-covered roads

●When driving with tire chains

●When driving over bumps in the road

●When driving over roads with potholes or uneven surfaces

■TRAC/VSC may not operate effectively when

4

Directional control and power may not be achievable while driving on slip-

pery road surfaces, even if the TRAC/VSC system is operating.

Drive the vehicle carefully in conditions where stability and power may be

lost.

■ Hill-start assist control does not operate effectively when

 2WD models

●Do not overly rely on the hill-start assist control. Hill-start assist control

may not operate effectively on steep inclines and roads covered with ice.

●Unlike the parking brake, hill-start assist control is not intended to hold the

vehicle stationary for an extended period of time. Do not attempt to use

hill-start assist control to hold the vehicle on an incline, as doing so may

lead to an accident.

 4WD models

Do not overly rely on the hill-start assist control. The hill-start assist control

may not operate effectively on a steep uphill and roads covered with ice.

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4-5. Using the driving support systems

WARNING

■When the TRAC/VSC/Trailer Sway Control is activated

The slip indicator light flashes. Always drive carefully.

Reckless driving may cause an accident. Exercise particular care when the

indicator light flashes.

■When TRAC/VSC/Trailer Sway Control systems are turned off

Be especially careful and drive at a speed appropriate to the road condi-

tions. As these are systems to help ensure vehicle stability and driving

force, do not turn the TRAC/VSC/Trailer Sway Control systems off unless

necessary.

■Replacing tires

Make sure that all tires are of the specified size, brand, tread pattern and

total load capacity. In addition, make sure that the tires are inflated to the

recommended tire inflation pressure level.

The ABS, Multi Terrain ABS, TRAC, VSC and Trailer Sway Control will not

function correctly if different tires are installed on the vehicle.

Contact your Toyota dealer for further information when replacing tires or

wheels.

■Handling of tires and the suspension

Using tires with any kind of problem or modifying the suspension will affect

the driving assist systems, and may cause a system to malfunction.

■Trailer Sway Control precaution

The Trailer Sway Control system is not able to reduce trailer sway in all situ-

ations.

Depending on many factors such as the conditions of the vehicle, trailer,

road surface and driving environment, the Trailer Sway Control system may

not be effective. Refer to your trailer owner’s manual for information on how

to tow your trailer properly.

■If trailer sway occurs

Observe the following precautions.

Failing to do so may cause death or serious injury.

●Firmly grip the steering wheel. Steer straight ahead.

Do not try to control trailer sway by turning the steering wheel.

●Begin releasing the accelerator pedal immediately but very gradually to

reduce speed.

Do not increase speed. Do not apply vehicle brakes.

If you make no extreme correction with the steering or brakes, your vehicle

and trailer should stabilize. (P. 195)

4RUNNER (U)

Driving -> Driving assist systems for Your Toyota 4 Runner SUV Fifth Generation (2010-2024)

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