2012 Toyota Sienna Owners Manual

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.

■Caution 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 travelling ahead. It is not a mechanism that allows careless 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.

●Assist 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 travelling 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 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 travelling ahead. Therefore, if there is ever any danger, the driver must take immediate and direct control of the vehicle and act appropriately in order to ensure the safety of all involved.

■To avoid inadvertent cruise control activation

Switch the cruise control off using the “ON-OFF” button when not in use.

310

SIENNA_U (OM45477U)

2

2-4. Using other driving systems

CAUTION

■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 ●When your vehicle is towing a trailer or during emergency towing

311

SIENNA_U (OM45477U)

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. 304) 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

312

SIENNA_U (OM45477U)

2

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.

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

If the sensor moves even slightly off position, the system may malfunction. 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.

313

SIENNA_U (OM45477U)

2-4. Using other driving systems Intuitive parking assist∗

The distance from your vehicle to nearby obstacles when parallel parking or maneuvering into a garage is measured by the sensors and communicated via the multi-information display, the touch screen and a buzzer. Always check the surrounding area when using this system. ■ Types of sensors

(if

Front corner sensors equipped) Rear corner sensors Rear center sensors

intuitive parking

Turns the assist on/off When on, the indicator light comes on and the buzzer sounds to inform the driver that the system is operational.

∗: If equipped

■ Intuitive parking assist switch

314

SIENNA_U (OM45477U)

2-4. Using other driving systems

Display

When the sensors detect an obstacle, a graphic is shown on the multi information display or touch screen depending on the position and distance to the obstacle. Multi-information display

Touch screen (with navigation system)*

*: Depending on the type of navigation system.

315

SIENNA_U (OM45477U)

2-4. Using other driving systems

The distance display and buzzer

When a sensor detects an obstacle, the direction of and the approxi- mate distance to the obstacle are displayed and the buzzer sounds. ■ Corner sensor operation and distance to an obstacle

The system operates when the vehicle approaches within the fol- lowing distances to an obstacle. The indicator flashes and the buzzer sounds when the system is operating.

Front (if equipped)

Approximate distance to obstacle

Indicator and buzzer / Color

2.0 to 1.2 ft. (60 to 37.5 cm) 1.2 to 0.8 ft. (37.5 to 25 cm) 0.8 ft. (25 cm) or less

Rear

Intermittent / yellow

Fast intermittent / yellow

Continuous / red

Approximate distance to obstacle

Indicator and buzzer / Color

2.8 to 1.2 ft. (85 to 37.5 cm) 1.2 to 0.8 ft. (37.5 to 25 cm) 0.8 ft. (25 cm) or less

Intermittent / yellow

Fast intermittent / yellow

Continuous / red

316

SIENNA_U (OM45477U)

2-4. Using other driving systems

■ Back sensor operation and distance to an obstacle

The system operates when the vehicle approaches within the fol- lowing distances to an obstacle. The indicator flashes and the buzzer sounds when the system is operating.

Approximate distance to obstacle

5.9 to 2.8 ft. (180 to 85 cm) 2.8 to 1.5 ft. (85 to 45 cm) 1.5 to 1.1 ft. (45 to 35 cm) 1.1 ft. (35 cm) or less

Indicator and buzzer / Color Slow intermittent / yellow

Intermittent / yellow

Fast intermittent / yellow

Continuous / red

317

SIENNA_U (OM45477U)

2-4. Using other driving systems

Detection range of the sensors

Approximately 2.0 ft. (60 cm) Approximately 2.8 ft. (85 cm) Approximately 5.9 ft. (180 cm) The diagram shows the detection range of the sensors. Note that the sensors cannot detect obsta- cles that are extremely close to the vehicle. The range of the sensors may change depending on the shape of the object etc. *: if equipped

■Intuitive parking assist can be operated when

Vehicles without a smart key system: The engine switch is in the “ON” posi- tion. Vehicles with a smart key system: The “ENGINE START STOP” switch is in IGNITION ON mode. ●Front corner sensors:

• The shift lever is not in P. • The vehicle speed is approximately 6 mph (10 km/h) or less.

●Rear corner and back sensors:

The shift lever is in R.

318

SIENNA_U (OM45477U)

2-4. Using other driving systems

■Sensor detection information

●Certain vehicle conditions and the surrounding environment may affect the ability of the sensor to correctly detect obstacles. Particular instances where this may occur are listed below. • There is dirt, snow or ice on the sensor. • The sensor is frozen. • The sensor is covered in any way. • The vehicle is leaning considerably to one side. • On an extremely bumpy road, on an incline, on gravel, or on grass • The vicinity of the vehicle is noisy due to vehicle horns, motorcycle engines, air brakes of large vehicles, or other loud noises producing ultrasonic waves.

• There is another vehicle equipped with parking assist sensors in the

vicinity.

• A sensor is coated with a sheet of spray or heavy rain. • The vehicle is equipped with a fender pole or radio antenna. • A bumper or sensor receives a strong impact. • The vehicle is approaching a tall or right-angled curb. • In harsh sunlight or intense cold weather

In addition to the examples above, there are instances in which, because of their shapes, signs and other objects may be judged by the sensor to be closer than they are. ●The shape of the obstacle may prevent the sensor from detecting it. Pay

particular attention to the following obstacles: • Wires, fences, ropes etc. • Cotton, snow and other materials that absorb sound waves • Sharply-angled objects • Low obstacles • Tall obstacles with upper sections projecting outwards in the direction

of your vehicle

319

SIENNA_U (OM45477U)

2-4. Using other driving systems

■If the display flashes and a message is displayed

→P. 744

■Certification (Canada only)

This ISM device complies with Canadian ICES-001.

■When there is a malfunction

In the following cases, have the vehicle inspected by your Toyota dealer. ●If the bumper is damaged. ●If the intuitive parking assist indicator light remains on without a beep

sounds.

CAUTION

■Caution when using the Intuitive parking assist-sensor

Observe the following precautions. Failure to do so may result in the vehicle being unable to be driven safely and possibly cause an accident. ●Do not use the sensor at speeds in excess of 6 mph (10 km/h). ●Do not attach any accessories within the sensor range.

NOTICE

■Notes when washing the vehicle

Do not apply intensive bursts of water or steam to the sensor area. Doing so may result in the sensor malfunctioning.

320

SIENNA_U (OM45477U)

2

2-4. Using other driving systems Rear view monitor system∗

The rear view monitor system assists the driver by displaying an image of the area behind the vehicle while reversing. The image is displayed in reverse on the screen. This reversed image is a similar image to the one on the inside rear view mirror.

The rear view image is dis- played when the shift lever is in the R position.

If the shift lever is shifted out of R, the screen returns to the previous one.

∗: If equipped 321

SIENNA_U (OM45477U)

2-4. Using other driving systems

■Displayed area

Corners of bumper

The area covered by the camera is lim- ited. Objects that are close to either cor- ner of the bumper or under the bumper cannot be seen on the screen. The area displayed on the screen may vary depending on vehicle orientation or road conditions.

322

SIENNA_U (OM45477U)

2-4. Using other driving systems

■Rear view monitor system camera

In the following cases, it may be difficult to see the images on the screen, even when the system is functioning correctly. • The vehicle is in a dark area, such as

at night.

• The temperature near the lens is

extremely high or low.

• Water droplets are on the camera lens or humidity is high, such as when it rains.

• Foreign matter, such as snow and

mud, adheres to the camera lens.

• The sun or headlights are shining

directly into the camera lens.

• When the camera is used under fluo- rescent lights, sodium lights, mercury lights etc., the lights and the illumi- nated areas may appear to flicker.

• If the lens is scratched.

■Smear effect

SIENNA_U (OM45477U)

If a bright light, such as sunlight reflected off the vehicle body, is picked up by the camera, a smear effect* characteristic to the camera may occur. *: Smear effect – A phenomenon that occurs when a bright light is picked up by the camera; when transmitted by the camera, the light source appears to have a vertical streak above and below it.

323

2-4. Using other driving systems

■Driving precautions

the grade behind

When the vehicle slopes up sharply, objects appear to be farther away than they actually are.

the grade behind

When the vehicle slopes down sharply, objects appear to be closer than they actually are.

324

SIENNA_U (OM45477U)

2

2-4. Using other driving systems

When any part of the vehicle sags due to the number of passengers or the distribu- tion of the load, there is a margin of error between the guide lines on the screen and the actual distance/course on the road.

■Setting the rear view monitor system displays

Vehicles with navigation system →“NAVIGATION SYSTEM OWNER’S MANUAL” Vehicles without navigation system →P. 259

325

SIENNA_U (OM45477U)

2-4. Using other driving systems

CAUTION

■When using the rear view monitor system

Observe the following precautions to avoid an accident that could result in death or serious injuries: ●Never depend solely on the monitor system when reversing. ●Always check visually and with the mirrors to confirm your intended path is

clear.

●Depicted distances between objects and flat surfaces differ from actual

distances.

●Do not use the system if the back door is open.

■Conditions which may affect the rear view monitor system

●If the back of the vehicle has been hit, the camera’s position and mounting angle may have changed. Have the vehicle inspected by your Toyota dealer.

●Rapid temperature changes, such as when hot water is poured on the

vehicle in cold weather, may cause the system to function abnormally.

●If the camera lens is dirty, it cannot transmit a clear image. Rinse with water and wipe with a soft cloth. If the camera lens is extremely dirty, wash with a mild cleanser and rinse.

●The displayed image may be darker and moving images may be slightly

distorted when the system is cold.

●When washing the vehicle, do not apply intensive bursts of water to the

camera or camera area. Doing so may result in the camera malfunction.

●Do not scrub the lens strongly or polish the lens using stiff brushes or abrasive cleansers. Doing so could scratch the lens and affect the image. ●Do not allow organic solvent, car wax, window cleaner or glass coat to

adhere to the camera. If this happens, wipe it off as soon as possible.

326

SIENNA_U (OM45477U)

2

2-4. Using other driving systems Driving assist systems

To help enhance driving safety and performance, the following sys- tems 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 vehicle. ■ 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

■ 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

■ Enhanced VSC (Enhanced Vehicle Stability Control)

Provides cooperative control of the ABS, TRAC, VSC and EPS. Helps to maintain directional stability when swerving on slippery road surfaces by controlling steering performance.

■ TRAC (Traction Control)

Helps to maintain drive power and prevent the drive wheels from spin- ning when starting the vehicle or accelerating on slippery roads

■ Hill-start assist control (if equipped)

→P. 333

■ EPS (Electric Power Steering)

Employs an electric motor to reduce the amount of effort needed to turn the steering wheel

327

SIENNA_U (OM45477U)

2-4. Using other driving systems

■ Active Torque Control 4WD (AWD models only)

Automatically switches from front-wheel drive to AWD (All-Wheel Drive) according to driving conditions, helping to ensure reliable handling and stability. Examples of conditions where the system will switch to AWD are when cornering, going uphill, starting off or accelerating, and when the road surface is slippery due to snow or rain etc.

■ VDIM

(Vehicle Dynamics

Integrated Management)

(if

equipped) Provides integrated control of the ABS, brake assist, TRAC, VSC, hill- start assist control, and EPS systems Helps to maintain vehicle stability when swerving on slippery road sur- faces by controlling the brakes and engine output ■ PCS (Pre-Collision System) (if equipped)

→P. 336

When the Enhanced VSC/TRAC systems are operating

the slip

If the vehicle is in danger of slip- ping or if any of the drive wheels spins, light flashes the Enhanced VSC/TRAC systems are operating.

indicator that

indicate

to

A buzzer (intermittent) sounds to indicate that VSC is operating.

328

SIENNA_U (OM45477U)

2-4. Using other driving systems

Disabling TRAC and VSC system

If the vehicle gets stuck in fresh snow or mud, TRAC and VSC may reduce power from the engine to the wheels. You may need to turn the system off to enable you to rock the vehicle in order to free it. ■ Turning off the TRAC system only

To turn the TRAC system off, quickly press and release the button.

The “TRAC OFF” indicator light will come on. Push the button again to turn the system back on.

■ Turning off both TRAC and VSC systems

To turn the TRAC and VSC sys- tems off, press and hold the but- ton for more than 3 seconds while the vehicle is stopped.

The “TRAC OFF” indicator light and VSC OFF indicator light will come on. Press the button again to turn the systems back on.

329

SIENNA_U (OM45477U)

2-4. Using other driving systems

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

switch has not been pressed TRAC and hill-start assist control cannot be operated. Contact your Toyota dealer.

■Sounds and vibrations caused by ABS, brake assist, Enhanced VSC

and TRAC ●A sound may be heard from the engine compartment when the engine is started or just after the vehicle begins to move. This sound does not indi- cate 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 after the vehicle comes to a stop. • The brake pedal may pulsate slightly after ABS is activated. • The brake pedal may move down slightly after ABS is activated.

■EPS operation sound

When the steering wheel is operated, a motor sound (whirring sound) may be heard. This does not indicate a malfunction.

■Reactivation of the TRAC and VSC systems after turning off the engine Turning off the engine after turning off the TRAC and VSC systems will auto- matically reactivate them.

■Reactivation of the TRAC system linked to vehicle speed

When only the TRAC system is turned off, the TRAC system will turn on when vehicle speed increases. However, when both TRAC and VSC sys- tems are turned off, the systems will not turn on even when vehicle speed increases.

330

SIENNA_U (OM45477U)

2

2-4. Using other driving systems

■Reduced effectiveness of the EPS system

The effectiveness of the EPS system is reduced to prevent the system from overheating when there is frequent steering input over an extended period of time. The steering wheel may feel heavy as a result. Should this occur, refrain from excessive steering input or stop the vehicle and turn the engine off. The EPS system should return to normal within 10 minutes.

CAUTION

■ABS does not operate effectively when

●Tires with inadequate gripping ability are used (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 ABS is operating may exceed that of normal

conditions The ABS is not designed to shorten the vehicle’s stopping distance. Always maintain a safe distance from the vehicle in front of you in the following situ- ations. ●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 roads with uneven surfaces

■TRAC may not operate effectively when

Directional control and power may not be achievable while driving on slip- pery road surfaces, even if the TRAC system is operating. Do not drive the vehicle in conditions where stability and power may be lost.

331

SIENNA_U (OM45477U)

2-4. Using other driving systems

CAUTION

■When Enhanced VSC is activated

The slip indicator light flashes and a warning buzzer sounds. Always drive carefully. Reckless driving may cause an accident. Exercise particular care when the indicator light flashes and a buzzer sounds.

■When TRAC and VSC systems are turned off

Be especially careful and drive at a speed appropriate to the road condi- tions. As these are the systems to ensure vehicle stability and driving force, do not turn the TRAC and VSC systems off unless necessary.

■Replacing tires

Make sure that all tires are of the specified size and of the same brand, tread pattern and total load capacity. In addition, make sure that the tires are inflated to the recommended tire pressure level. The ABS and Enhanced VSC systems 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 suspension

Using tires with any kind of problem or modifying the suspension will affect the driving assist systems, and may cause the system to malfunction.

■Active Torque Control 4WD system

●The AWD system of this vehicle is intended to ensure driving stability on normal roads. It is not designed for use in demanding situations such as rally driving.

●Take care when driving on slippery road surfaces.

332

SIENNA_U (OM45477U)

2

2-4. Using other driving systems Hill-start assist control∗

Hill-start assist control helps to prevent the vehicle from rolling backwards when starting on an incline or slippery slope.

To engage hill-start assist con- trol, further depress the brake pedal when is stopped completely.

the vehicle

A buzzer will sound once to indicate that the system is acti- vated. The slip indicator will also start flashing.

∗: If equipped 333

SIENNA_U (OM45477U)

2-4. Using other driving systems

■Hill-start assist control can be operated when

• The shift lever is in a position other than P. • The parking brake is not applied. • The accelerator pedal is not depressed.

■Hill-start assist control

●While hill-start assist control is operating, the brakes remain automati- cally applied after the driver releases the brake pedal. The stop lights and the high mounted stoplight turn on.

●Hill-start assist control operates for about 2 seconds after the brake pedal

is released.

●If the slip indicator does not flash and the buzzer does not sound when the brake pedal is further depressed, slightly reduce the pressure on the brake pedal (do not allow the vehicle to roll backward) and then firmly depress it again. If the system still does not operate, check if the operat- ing conditions explained above have been met.

■Hill-start assist control buzzer

●When hill-start assist control is activated, the buzzer will sound once. ●In the following situations, hill-start assist control will be canceled and the

buzzer will sound twice. • No attempt is made to drive the vehicle within approximately 2 seconds

of releasing the brake pedal. • The shift lever is moved to P. • The parking brake is applied. • The brake pedal is depressed again. • The brake pedal has been depressed for more than approximately

3 minutes.

■If the slip indicator comes on...

It may indicate a malfunction in the system. Contact your Toyota dealer.

334

SIENNA_U (OM45477U)

2-4. Using other driving systems

CAUTION

■Hill-start assist control

●Do not overly rely on hill-start assist control. Hill-start assist control may not operate effectively on extremely steep inclines or roads covered in 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 for an extended period of time, as doing so may lead to an accident.

335

SIENNA_U (OM45477U)

2-4. Using other driving systems PCS (Pre-Collision System)∗

When the radar sensor detects that a frontal collision is highly likely or even unavoidable, the systems such as the brakes and seat belts are automatically engaged to lessen impact to occupants as well as vehicle damage. ■ Pre-collision seat belts (front seat belts only)

If the pre-collision sensor detects that a collision is unavoidable, the pre-collision system will retract the seat belt before the colli- sion occurs. The same will happen if the driver makes an emer- gency braking or loses control of the vehicle. (→P. 131) However, when the VSC system is disabled, the system will not operate in the event of skidding.

■ Pre-collision brake assist

When there is a high possibility of a frontal collision, the system applies greater braking force in relation to how strongly the brake pedal is depressed.

■ Pre-collision braking

When there is a high possibility of a frontal collision, the system warns the driver using a warning light and buzzer. If the system determines that a collision is unavoidable, the brakes are auto- matically applied to reduce the collision speed. Pre-collision braking can be disabled using the pre-collision braking off switch.

∗: If equipped

336

SIENNA_U (OM45477U)

Disabling pre-collision braking

Radar sensor

2-4. Using other driving systems

Pre-collision braking disabled Pre-collision braking enabled The “PCS” warning light flashes when pre-collision braking is dis- abled.

The radar sensor detects vehi- cles or other obstacles on or near the road ahead and deter- mines whether a collision is imminent based on the position, speed, and heading of the obsta- cles.

337

SIENNA_U (OM45477U)

2-4. Using other driving systems

■The pre-collision system is operational when

●Pre-collision seat belts (type A):

• Vehicle speed is greater than about 4 mph (5 km/h). • The speed at which your vehicle is approaching the obstacle or oncom-

ing vehicle is greater than about 19 mph (30 km/h).

• The front occupants are wearing a seat belt.

●Pre-collision seat belts (type B):

• Vehicle speed greater than about 19 mph (30 km/h). • The system detects sudden braking or skidding. • The front occupants are wearing a seat belt.

●Pre-collision brake assist:

• Vehicle speed is greater than about 19 mph (30 km/h). • The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 19 mph (30 km/h).

• The brake pedal is depressed.

●Pre-collision braking:

• The pre-collision braking off switch is not pressed. • Vehicle speed is greater than about 10 mph (15 km/h). • The speed at which your vehicle is approaching the obstacle or the vehicle running ahead of you is greater than about 10 mph (15 km/h).

338

SIENNA_U (OM45477U)

2-4. Using other driving systems

■Conditions that may trigger the system even if there is no possibility of

a collision ●When there is an object by the roadside at the entrance to a curve ●When passing an oncoming vehicle on a curve ●When driving over a narrow iron bridge ●When there is a metal object on the road surface ●When driving on an uneven road surface ●When passing an oncoming vehicle on a left-turn ●When your vehicle rapidly closes on the vehicle in front ●When a grade separation/interchange, sign, billboard, or other structure

appears to be directly in the vehicle’s line of travel

●When climbing a steep hill causes an overhead billboard or other metallic

structure to appear directly in the vehicle’s line of travel

●When there is an overhead bridge, sign or billboard ahead ●When there are excessive changes in the vehicle height (when it tilts for-

wards or backwards)

●When there is an abnormality in the radar sensor ●When an overhead metal object can be seen at the top of an uphill road ●When passing through an electronic toll collection gate (only in countries

with electronic toll collection)

When the system is activated in the situations described above, there is also a possibility that the seat belts will retract quickly and the brakes will be applied with a force greater than normal. When the seat belt is locked in the restricted position, stop the vehicle in a safe place, release the seat belt and refasten it.

■Obstacles not detected

The sensor cannot detect plastic obstacles such as traffic cones. There may also be occasions when the radar sensor cannot detect pedestrians, ani- mals, bicycles, motorcycles, trees, or snowdrifts.

339

SIENNA_U (OM45477U)

2-4. Using other driving systems

■When there is a malfunction in the system Warning lights will turn on or flash. (→P. 729)

■Certification

U.S.A. FCC ID: HYQDNMWR005 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. 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.

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.

340

SIENNA_U (OM45477U)

2

2-4. Using other driving systems

CAUTION

■Limitations of the pre-collision system

Do not overly rely on the pre-collision system. Always drive safely, taking care to observe your surroundings and checking for any obstacles or other road hazards.

■Cautions regarding the assist contents of the system

By means of alarms and brake control, the pre-collision system is intended to assist the driver in avoiding collisions through the process of LOOK- JUDGE-ACT. There are limits to the degree of assistance the system can provide, so please keep in mind the following important points. ●Assisting the driver in watching the road

The pre-collision system is only able to detect obstacles directly in front of the vehicle, and only within a limited range. It is not a mechanism that allows careless or inattentive driving, and it is not a system that can assist the driver in low-visibility conditions. It is still necessary for the driver to pay close attention to the vehicle’s surroundings. ●Assisting the driver in making correct judgment

When attempting to estimate the likelihood of a collision, the only data available to the pre-collision system is that from obstacles it has detected directly in front of the vehicle. Therefore, it is absolutely necessary for the driver to remain vigilant and to determine whether or not there is a possi- bility of collision in any given situation.

●Assisting the driver in taking action

The pre-collision system’s braking assist feature is designed to help reduce the severity of a collision, and so only acts when the system has judged that a collision is unavoidable. This system by itself is not capable of automatically avoiding a collision or bringing the vehicle to a stop safety. For this reason, when encountering a dangerous situation the driver must take direct and immediate action in order to ensure the safety of all involved.

341

SIENNA_U (OM45477U)

2-4. Using other driving systems

CAUTION

■Handling the radar sensor

Observe the following to ensure the pre-collision system can function effec- tively: ●Keep the sensor and front grille clean at all times.

Clean the sensor and front grille with a soft cloth so you do not mark or damage them.

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

If the sensor moves even slightly off position, the system may malfunction. If the sensor or surrounding area is subject to a strong impact, always have the area inspected and adjusted by your Toyota dealer.

●Do not disassemble the sensor. ●Do not attach accessories or stickers to the sensor, grille or surrounding

area.

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

342

SIENNA_U (OM45477U)

2-5. Driving information Cargo and luggage

Take notice of the following information about storage precau- tions, cargo capacity and load: ● Stow cargo and luggage in the luggage compartment whenever

possible.

● Be sure all items are secured in place. ● To maintain vehicle balance while driving, position luggage

evenly within the luggage compartment.

● For better fuel economy, do not carry unnecessary weight.

343

SIENNA_U (OM45477U)

2-5. Driving information

Capacity and distribution

Cargo capacity depends on the total weight of the occupants. (Cargo capacity) = (Total load capacity) - (Total weight of occupants) Steps for Determining Correct Load Limit ⎯ (1) Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs.” on your vehi- cle’s placard.

(2) Determine the combined weight of the driver and passengers

that will be riding in your vehicle.

(3) Subtract the combined weight of the driver and passengers from

XXX kg or XXX lbs.

(4) The resulting figure equals the available amount of cargo and

luggage load capacity. For example, if the “XXX” amount equals 1400 lbs. and there will be five 150 lb passengers in your vehicle, the amount of avail- able cargo and luggage load capacity is 650 lbs. (1400 - 750 (5 × 150) = 650 lbs.)

(5) Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in Step 4. If your vehicle will be towing a trailer, load from your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle. (→P. 784)

(6)

344

SIENNA_U (OM45477U)

2-5. Driving information

Example based on your vehicle

Cargo capacity Total load capacity

When 2 people with the combined weight of 366 lb. (166 kg) are riding in your vehicle, which has a total load capacity of 1660 lb. (750 kg)*, the available amount of cargo and luggage load capacity will be as follows: 1660 lb. - 366 lb. = 1294 lb. (750 kg - 166 kg = 584 kg)

In this condition, if 3 more passengers with the combined weight of 388 lb. (176 kg) get on, the available cargo and luggage load will be reduced as follows:

1294 lb. - 388 lb. = 906 lb. (584 kg - 176 kg = 408 kg) *: The capacity weight varies depending on the vehicle model. (→P. 784) As shown in the example above, if the number of occupants increases, the cargo and luggage load will be reduced by an amount that equals the increased weight due to the additional occupants. In other words, if an increase in the number of occupants causes an excess of the total load capacity (combined weight of occupants plus cargo and luggage load), you must reduce the cargo and luggage on your vehicle.

345

SIENNA_U (OM45477U)

2-5. Driving information

Roof luggage carrier (if equipped)

■ Roof luggage carrier components

Roof rails Cross rails

■ Adjusting the position of cross rails

Turn the knobs counterclockwise to release the cross rails.

Slide the cross rails to the appro- priate position for loading lug- gage and the knobs clockwise to tighten the cross rails securely.

turn

346

SIENNA_U (OM45477U)

Seating configuration variation

2-5. Driving information

Cargo capacity Weight of the removed second seat

If removing the second seats, it is possible to load extra cargo equal to the weight of the removed seats. (Cargo capacity) = (Total load capacity) - (Total weight of occupants) + (Weight of the removed second seats) Second seats weight:

7-passenger models

Tip-up seat, fabric: 45 lb. (21 kg) Tip-up seat, leather: 47 lb. (22 kg) Ottoman seat: 83 lb. (37 kg)

8-passenger models

Right side, fabric: 45 lb. (21 kg) Right side, leather: 47 lb. (22 kg) Left side, fabric: 80 lb. (36 kg) Left side, leather: 83 lb. (37 kg)

347

SIENNA_U (OM45477U)

2-5. Driving information

CAUTION

■Things that must not be carried in the luggage compartment

The following things may cause a fire if loaded in the luggage compart- ment: ●Receptacles containing gasoline ●Aerosol cans

■Storage precautions

Observe the following precautions. Failing to do so may result in death or serious injury. ●Stow cargo and luggage in the luggage compartment whenever possi-

ble.

●Do not stack anything in the luggage compartment higher than the seatbacks. Such items may be thrown about and possibly injure peo- ple in the vehicle in the event of sudden braking or in an accident.

●Do not place cargo or luggage in or on the following locations as the item may get under the brake or accelerator pedal and prevent the pedals from being depressed properly, block the driver’s vision, or hit the driver or passengers, causing an accident. • Driver’s feet • Front passenger or rear seats (when stacking items) • Instrument panel • Dashboard • Auxiliary box or tray that has no lid

348

SIENNA_U (OM45477U)

2

2-5. Driving information

CAUTION

■Storage precautions

●Secure all items in the occupant compartment, as they may shift and injure someone during sudden braking, sudden swerving or an acci- dent.

●When you fold down the rear seats, long items should not be place

directly behind the front seats.

●Never allow anyone to ride in the luggage compartment. It is not designed for passengers. They should ride in their seats with their seat belts properly fastened. Otherwise, they are much more likely to suffer death or serious bodily injury, in the event of sudden braking, sudden swerving or an accident. ■Capacity and distribution

●Do not exceed the maximum axle weight rating or the total vehicle

weight rating.

●Even if the total load of occupant’s weight and the cargo load is less

than the total load capacity, do not apply the load unevenly. Improper loading may cause deterioration of steering or braking con- trol which may cause death or serious injury.

■Cross rail adjustment

Make sure the cross rails are locked securely by pushing forward and rearward them. Failure to do so may cause an unexpected accident.

349

SIENNA_U (OM45477U)

2-5. Driving information

CAUTION

■When loading cargo

Observe the following precautions: ●Place the cargo so that its weight is distributed evenly between the

front and rear axles.

●If loading long or wide cargo, never exceed the vehicle overall length

or width. (→P. 784)

●Before driving, make sure the cargo is securely fastened on the roof

luggage carrier.

●Loading cargo on the roof luggage carrier will make the center of grav- ity of the vehicle higher. Avoid high speeds, sudden starts, sharp turns, sudden braking or abrupt maneuvers, otherwise it may result in loss of control or vehicle rollover due to failure to operate this vehicle correctly and result in death or serious injury.

●If driving for a long distance, on rough roads, or at high speeds, stop the vehicle now and then during the trip to make sure the cargo remains in its place.

●Do not exceed 150 lb. (68 kg) cargo weight on the roof luggage carrier.

NOTICE

■When loading cargo (vehicles with moon roof)

Be careful not to scratch the surface of the moon roof.

350

SIENNA_U (OM45477U)

2-5. Driving information Vehicle load limits

Vehicle load limits include total load capacity, seating capacity, TWR (Trailer Weight Rating) and cargo capacity. ■ Total load capacity: (→P. 784)

Total load capacity means the combined weight of occupants, cargo and luggage.

■ Seating capacity: 7 or 8 occupants (Front 2, Rear 5 or 6)

Seating capacity means the maximum number of occupants whose estimated average weight is 150 lb. (68 kg) per person.

■ TWR (Trailer Weight Rating): 3500 lb. (1588 kg)

TWR means the maximum gross trailer weight (trailer weight plus its cargo weight) that your vehicle is able to tow.

■ Cargo capacity

Cargo capacity may increase or decrease depending on the weight and the number of occupants.

■Total load capacity and seating capacity

These details are also described on the tire and loading information label. (→P. 683)

CAUTION

■Overloading the vehicle

Observe the total load capacity when you load the vehicle. (→P. 784) Otherwise, it may not only cause damage to the tires, but also degrade steering and braking ability, resulting in an accident.

351

SIENNA_U (OM45477U)

2-5. Driving information Winter driving tips

Carry out the necessary preparations and inspections before driving the vehicle in winter. Always drive the vehicle in a manner appropri- ate to the prevailing weather conditions. ■ Pre-winter preparations

● Use fluids that are appropriate to the prevailing outside tem-

peratures. • Engine oil • Engine coolant • Washer fluid

● Have a service technician inspect the level and specific grav-

ity of battery electrolyte.

● Have the vehicle fitted with four snow tires or purchase a set

of tire chains for the front tires. Ensure that all tires are the same size and brand, and that chains match the size of the tires. ■ Before driving the vehicle

Perform the following according to the driving conditions: ● Do not try to forcibly open a window or move a wiper that is frozen. Pour warm water over the frozen area to melt the ice. Wipe away the water immediately to prevent it from freezing. ● To ensure proper operation of the climate control system fan, remove any snow that has accumulated on the air inlet vents in front of the windshield.

● Remove any ice that has accumulated on the vehicle chassis. ● Periodically check for and remove any excess ice or snow that may have accumulated in the wheel well or on the brakes.

352

SIENNA_U (OM45477U)

2-5. Driving information

■ When driving the vehicle

Accelerate the vehicle slowly and drive at a reduced speed suit- able to road conditions.

■ When parking the vehicle

Park the vehicle and move the shift lever to P without setting the parking brake. The parking brake may freeze up, preventing it from being released. If necessary, block the wheels to prevent inadvertent sliding or creeping.

Selecting tire chains

Use the tire chains of correct size and type.

Use SAE Class “S” type radial tire chains, with the exception of radial cable chains or V-bar type chains.

Regulations on the use of tire chains

Regulations regarding the use of tire chains vary depending on loca- tion and type of road. Always check local regulations before installing chains.

353

SIENNA_U (OM45477U)

2-5. Driving information

■Tire chain installation

Observe the following precautions when installing and removing chains. ●Install and remove tire chains in a safe location. ●Install tire chains on the front tires only. Do not install tire chains on the

rear tires.

●Install tire chains on front tires as tightly as possible. Retighten chains

after driving 1/4 - 1/2 mile (0.5 - 1.0 km).

●Install tire chains following the instructions provided with the tire chains.

CAUTION

■Driving with snow tires

Observe the following precautions to reduce the risk of accidents. Failing to do so may result in a loss of vehicle control and cause death or serious injury. ●Use tires of the size specified. ●Maintain the recommended level of air pressure. ●Do not drive in excess of 75 mph (120 km/h), regardless of the type of

snow tires being used.

●Use snow tires on all, not just some wheels.

354

SIENNA_U (OM45477U)

2

2-5. Driving information

CAUTION

■Driving with tire chains

Observe the following precautions to reduce the risk of accidents. Failing to do so may result in the vehicle being unable to be driven safely, and may cause death or serious injury. ●Do not drive in excess of the speed limit specified for the tire chains being

used or 30 mph (50 km/h), whichever is lower.

●Avoid driving on bumpy road surfaces or over potholes. ●Avoid sudden turns and braking, as use of chains may adversely affect

vehicle handling.

●Slow down sufficiently before entering a curve to ensure that vehicle con-

trol is maintained.

NOTICE

■Repairing or replacing snow tires

Request repairs of or replacement of snow tires from Toyota dealers or legit- imate tire retailers. This is because the removal and attachment of snow tires affects the opera- tion of the tire pressure warning valves and transmitters.

■Fitting tire chains

The tire pressure warning valves and transmitters may not function correctly when tire chains are fitted.

355

SIENNA_U (OM45477U)

2-5. Driving information Trailer towing (with towing package)

Your vehicle is designed primarily as a passenger-and-load-carrying vehicle. Towing a trailer can have an adverse impact on handling, performance, braking, durability, and fuel consumption. For your safety and the safety of others, you must not overload your vehicle or trailer. You must also ensure that you are using appropriate tow- ing equipment, that the towing equipment has been installed cor- rectly and used properly, and that you employ the requisite driving habits. Vehicle-trailer stability and braking performance are affected by trailer stability, brake performance and setting, trailer brakes, the hitch and hitch systems (if equipped). To tow a trailer safely, use extreme care and drive the vehicle in accordance with your trailer’s characteristics and operating condi- tions. Toyota warranties do not apply to damage or malfunction caused by towing a trailer for commercial purposes. Contact your Toyota dealer for further information about additional requirements such as a towing kit, etc.

356

SIENNA_U (OM45477U)

2

2-5. Driving information

Towing related terms

■ GCWR (Gross Combination Weight Rating)

The maximum allowable gross combination weight. The gross combination weight is the sum of the total vehicle weight (including the occupants, cargo and any optional equipment installed on the vehicle) and the weight of the trailer being towed (including the cargo in the trailer).

■ GVWR (Gross Vehicle Weight Rating)

The maximum allowable gross vehicle weight. The gross vehicle weight is the total weight of the vehicle. When towing a trailer, it is the sum of the vehicle weight (including the occupants, cargo and any optional equipment installed on the vehicle) and the tongue weight.

357

SIENNA_U (OM45477U)

2-5. Driving information

■ GAWR (Gross Axle Weight Rating)

Front GAWR

Rear GAWR

The maximum allowable gross axle weight. The gross axle weight is the load placed on each axle (front and rear).

■ TWR (Trailer Weight Rating)

(With brakes)

The maximum allowable gross trailer weight. The gross trailer weight is the sum of the trailer weight and the weight of the cargo in the trailer. is calculated assuming TWR base vehicle with one driver, one front passenger, towing package (if available), hitch and hitch sys- tems (if required).

Additional optional equipment, passengers and cargo in the vehi- cle will reduce the trailer weight rating so as not to exceed GCWR, GVWR and GAWR. If the gross trailer weight exceeds 3000 lb. (1360 kg), it is recom- mended to use a trailer with 2 or more axles.

358

SIENNA_U (OM45477U)

2-5. Driving information

■ Unbraked TWR (Unbraked Trailer Weight Rating)

(Without brakes)

The trailer weight rating for tow- ing a trailer without a trailer ser- vice brake system.

■ Tongue Weight

The load placed on the trailer hitch ball. (→P. 362)

359

SIENNA_U (OM45477U)

2-5. Driving information

Weight limits

● The gross trailer weight must never exceed 3500 lb. (1588 kg). ● The gross combination weight must never exceed the GCWR

described below. 2WD models: 8900 lb. (4037 kg) AWD models: 8990 lb. (4078 kg)

● The gross vehicle weight must never exceed the GVWR indi- cated on the Certification Label.

● The gross axle weight on each axle must never exceed the GAWR indicated on the Certi- fication Label.

● If the gross trailer weight is over the unbraked TWR, trailer service

brakes are required.

● If the gross trailer weight is over 2000 lbs. (907 kg), a sway control

device with sufficient capacity is required.

360

SIENNA_U (OM45477U)

2

2-5. Driving information

GCWR, TWR and Unbraked TWR

Confirm that the gross trailer weight, gross combination weight, gross vehicle weight, gross axle weight and tongue weight are all within the limits. ■ GCWR∗

2WD models: 8900 lb. (4037 kg) AWD models: 8990 lb. (4078 kg)

■ TWR∗

3500 lb. (1588 kg) ■ Unbraked TWR∗ 1650 lb. (750 kg)

∗: These models meet the tow-vehicle trailering requirement of SAE Interna-

tional per SAE J2807.

361

SIENNA_U (OM45477U)

2-5. Driving information

Trailer Tongue Weight

● A recommended tongue weight varies in accordance with the types

of trailers or towing as described below.

● To ensure the recommended values shown below, the trailer must

be loaded by referring to the following instructions. • Tongue Weight

The gross trailer weight should be distributed so that the tongue weight is 9 to 11 %. (Tongue weight / Gross trailer weight × 100 = 9 to 11 %)

Gross trailer weight Tongue weight

If using a weight distributing hitch when towing, return the front axle to the same weight as before the trailer connection. If front axle weight cannot be measured directly, measure the front fender height above the front axle before connection. Adjust weight distributing hitch torque until front fender is returned to the same height as before connection. The gross trailer weight, gross axle weight and tongue weight can be measured with platform scales found at a highway weighing sta- tion, building supply company, trucking company, junk yard, etc.

362

SIENNA_U (OM45477U)

2-5. Driving information

Hitch

Trailer hitch assemblies have different weight capacities. Toyota rec- ommends the use of Toyota hitch/bracket for your vehicle. For details, contact your Toyota dealer. ● If you wish to install a trailer hitch, contact your Toyota dealer. ● Use only a hitch that conforms to the gross trailer weight require-

ment of your vehicle.

● Follow the directions supplied by the hitch manufacturer. ● Lubricate the hitch ball with a light coating of grease. ● Remove the trailer hitch whenever you are not towing a trailer. After removing the hitch, seal any mounting hole in the vehicle body to prevent entry of any substances into the vehicle.

363

SIENNA_U (OM45477U)

2-5. Driving information

Selecting trailer ball

Use the correct trailer ball for your application.

Trailer ball load rating Matches or exceeds the gross trailer weight rating of the trailer. Ball diameter Matches the size of the trailer coupler. Most couplers are stamped with the required trailer ball size.

Trailer class

Typical trailer ball size

IV

2 5/16 in.

II and III

2 in.

1 7/8 in.

Shank length Protrudes beyond the bottom of the lock washer and nut at least 2
threads. Shank diameter Matches diameter size.

the ball mount hole

364

SIENNA_U (OM45477U)

Positions for towing hitch receiver

2-5. Driving information

Hitch receiver pin hole posi- tion: 37.3 in. (949.8 mm)

Connecting trailer lights

Please consult your dealer when installing trailer lights, as incorrect installation may cause damage to the vehicle’s lights. Please take care to comply with your state’s laws when installing trailer lights.

365

SIENNA_U (OM45477U)

2-5. Driving information

Trailer towing tips

Your vehicle will handle differently when towing a trailer. Help to avoid an accident, death or serious injury, keep the following in mind when towing: ● Speed limits for towing a trailer vary by state or province. Do not

exceed the posted towing speed limit.

● Toyota recommends that the vehicle-trailer speed limit is 65 mph (104 km/h) on a flat, straight, dry road. Do not exceed this limit, the posted towing speed limit or the speed limit for your trailer as set forth in your trailer owner’s manual, whichever is lowest. Instability of the towing vehicle-trailer combination (trailer sway) increases as speed increases. Exceeding speed limits may cause loss of con- trol.

● Before starting out, check the trailer lights, tires and the vehicle-

trailer connections. Recheck after driving a short distance.

● Practice turning, stopping and reversing with the trailer attached in an area away from traffic until you become accustomed to the feel of the vehicle-trailer combination.

366

SIENNA_U (OM45477U)

2-5. Driving information

● Reversing with a trailer attached is difficult and requires practice. Grip the bottom of the steering wheel and move your hand to the left to move the trailer to the left. Move your hand to the right to move the trailer to the right. (This is generally opposite to reversing without a trailer attached.) Avoid sharp or prolonged turning. Have someone guide you when reversing to reduce the risk of an acci- dent.

● As stopping distance is increased when towing a trailer, vehicle-to- vehicle distance should be increased. For each 10 mph (16 km/h) of speed, allow at least one vehicle and trailer length.

● Avoid sudden braking as you may skid, resulting in the trailer jack- knifing and a loss of vehicle control. This is especially true on wet or slippery surfaces.

● Avoid jerky starts or sudden acceleration. ● Avoid jerky steering and sharp turns, and slow down before mak-

ing a turn.

● Note that when making a turn, the trailer wheels will be closer than the vehicle wheels to the inside of the turn. Compensate by making a wider than normal turning radius.

● Slow down before making a turn, in crosswinds, on wet or slippery

surfaces, etc. Increasing vehicle speed can destabilize the trailer.