Toyota Sienna 2010-2024 Owners Manual: PCS (Pre-Collision System)

When the radar sensor detects possibility of a frontal collision, the pre-collision system such as the brakes and seat belts are automatically engaged to lessen impact as well as vehicle damage.

Pre-collision warning

When a high possibility of a frontal collision is detected, the pre-collision system warning light flashes, a buzzer sounds and a message is shown on the multi-information display to urge the driver to take evasive action.

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 collision occurs. The same will happen if the driver makes an emergency braking or loses control of the vehicle. 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.

The system may not warn the driver using a warning light, warning display and buzzer when the system detects and judges braking operations.

Pre-collision braking

When there is a high possibility of a frontal collision, the system warns the driver using a warning light, warning display and buzzer.

If the system determines that a collision is unavoidable, the brakes are automatically applied to reduce the collision speed. Pre-collision braking can be disabled using the pre-collision braking off switch.

Disabling pre-collision braking

1. Pre-collision braking disabled
2. Pre-collision braking enabled

The pre-collision system warning light will turn on when pre-collision braking is disabled.

Radar sensor

The radar sensor detects vehicles or other obstacles on or near the road ahead and determines whether a collision is imminent based on the position, speed, and heading of the obstacles.

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 the vehicle running ahead of you 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 is 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).

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

In any of the following situations where the frontal area of the radar sensor is interrupted, the radar sensor may detect possibility of a frontal collision and the system may be activated.

• When passing by an oncoming vehicle in a curve or a turn to the right or the left.
• When rapidly approaching an obstacle ahead (e.g. preceding vehicle, toll gate barrier, etc.)
• When there is a structural object (billboard, low ceiling, fluorescent light, etc.) above the uphill road ahead
• When driving on a narrow road or through under a low overhead structure (bridge, tunnel, fly-under, etc.)
• When driving on an uneven road surface
• When there is a metal object, bump, or protrusion on the road surface
• When vehicle’s front part is raised or lowered depending on loading conditions
• When the direction of radar sensor is misaligned by strong impact applied on an area around the radar sensor, etc.
• When there is an obstacle (guard rail, etc.) by the roadside at the entrance to a curve
• When the front of your vehicle is pointing upwards (caused by towing a trailer, during emergency towing or putting a heavy load in the luggage compartment etc.)

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 may be applied with a force greater than normal. When the seat belt is locked in the retracted 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, animals, bicycles, motorcycles, trees, or snowdrifts.

Situations in which the pre-collision system does not function properly

The system may not function effectively in situations such as the following:

• On roads with sharp bends or uneven surfaces
• If a vehicle suddenly moves in front of your vehicle, such as at an intersection
• If a vehicle suddenly cuts in front of your vehicle, such as when overtaking
• In inclement weather such as heavy rain, fog, snow or sand storms
• When your vehicle is skidding such as the VSC system off
• When an extreme change in vehicle height occurs
• When the axis of the radar is out of adjustment

Automatic cancelation of the pre-collision system

When a malfunction occurs due to sensor contamination, etc. that results in the sensors being unable to detect obstacles, the pre-collision system will be automatically disabled. In this case, the system will not activate even if there is a collision possibility.

When there is a malfunction in the system, or if the system is temporarily unavailable

The pre-collision system warning light will come on or flash, and warning messages will displayed. (, 556)

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 interference, 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.

• For vehicles sold in Canada

This device complies with Industry Canada licence-exempt RSS standards.

Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.