Toyota
Toyota Land Cruiser
 Owners Manual
When driving Using other driving systems
Pre-Collision System

When a frontal collision seems likely, the system attempts to lessen vehicles damage. Two types of pre-collision system are available.

The brake-linked pre-collision system operates in conjunction with the braking operation of the driver. The radar type pre-collision system has a sensor that is used to detect an unavoidable frontal collision.

  •  Pre-collision seat belts (front seats only)

  • Brake-linked pre-collision system

Based on the speed and amount of the drivers braking operation, the system determines if emergency braking is being performed. If this determination is made, the seat belts are immediately retracted to increase the effectiveness of the pretensioners . In addition, the system also operates if the driver loses control of the vehicle.

  • Radar type pre-collision system

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 (radar type only)

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.

Radar sensor (radar type only)

Detects vehicles or other obstacles

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.

When traveling on a road with very light traffic and very little to reflect the radar waves emitted by the radar sensor, the system may decide that the radar sensor is dirty, even if the sensor is not actually dirty. The system will automatically restore itself when reflected radar waves are detected.

  • Obstacles not detected (radar type only)

The sensor cannot detect plastic obstacles such as pylons. There may also be occasions when the radar sensor cannot detect pedestrians, animals, bicycles, motorcycles, trees, or snowdrifts.

  • The pre-collision system is operational when

  • Pre-collision seat belts (situation 1)
  •  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 (situation 2)
  •  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 (radar type only)
  •  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.

Conditions that may trigger the system even if there is no possibility of 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 (nose up, nose down)
  • 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 vehicles line of travel
  • When climbing a steep hill causes an overhead billboard or other metallic structure to appear directly in the vehicles line of travel
  • When an extreme change in vehicle height occurs
  • When the axis of the radar is out of adjustment
  • When passing through certain toll gates
  • When passing through an overpass
  • When passing through a tunnel

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 retracted position, stop the vehicle in a safe place, release the seat belt and refasten.

  • 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 your vehicle is steeply inclined
  • 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 unusable

Warning lights and/or warning messages will turn on or flash.

  • Certification (radar type only)

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 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 users 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.

CAUTION

  • Handling the radar sensor (radar type only)

Observe the following to ensure the pre-collision system can function effectively.

  • 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 become inaccurate or malfunction. If the sensor or surrounding area are 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 cover or surrounding area.
  • Do not modify or paint the sensor and grille.
  • Limitations of the pre-collision system

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

Failure to do so may cause an accident resulting in death or serious injury.

    More about Using other driving systems:

    Cruise control

    Dynamic radar cruise control

    Intuitive parking assist

    Four-wheel drive system

    Crawl Control (with Turn Assist function)

    Multi-terrain Select

    Multi-terrain Monitor

    Driving assist systems

    Pre-Collision System

    Toyota Land Cruiser Owners Manual / When driving / Using other driving systems / Pre-Collision System

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