PRE-COLLISION SYSTEM


  1. OUTLINE


    1. New models are available with ''Toyota Safety Sense'' , a pre-collision safety package, which consists of 3 driving support systems to support safe driving.


      1. Pre-collision system (PCS)

      2. Lane departure alert system (LDA)

      3. Automatic high beam (AHB)

    2. The pre-collision system detects the preceding vehicle and obstructions in front of the vehicle based on data from a monocular camera sensor and laser sensor built into the pre-collision city sensor.

    3. If the pre-collision system determines that the possibility of a collision is high, pre-collision alarm control and pre-collision brake assist control is performed, and if a collision is unavoidable, pre-collision brake control will be performed in order to reduce the impact of the collision.

    4. Due to the achievement of significant deceleration performance of pre-collision brake and pre-collision brake assist, a collision may be avoided or collision damage can be reduced. Pre-collision brake control can reduce the speed of the vehicle by at least 40 km/h (25 mph) *, and pre-collision brake assist control can assist braking throughout at least an 80 km/h (50 mph)* reduction in the speed of the vehicle.

      Tech Tips

      *: In some circumstances, the reduction in the speed of the vehicle may be lower than specified due to factors such as a poor road surface or extreme weather.

  2. PRECAUTION


    1. Limitations of the pre-collision system


      1. The driver is solely responsible for safe driving. Always drive safely, taking care to observe your surroundings. Do not use the pre-collision system instead of normal braking operations under any circumstances. This system will not prevent collisions or lessen collision damage or injury in every situation. Do not overly rely on this system. Failure to do so may lead to an accident, resulting in death or serious injury.

      2. Although this system is designed to help avoid and reduce the impact of a collision, its effectiveness may change according to various conditions, therefore the system may not always be able to achieve the same level of performance. Do not overly rely on this system and always drive carefully.

      3. Do not attempt to test the operation of the pre-collision system yourself, as the system may not operate properly, possibly leading to an accident.

    2. Pre-collision brake


      1. The pre-collision brake function may not operate if certain operations are performed by the driver. If the accelerator pedal is being depressed strongly or the steering wheel is being turned, the system may determine that the driver is taking evasive action and possibly prevent the pre-collision brake function from operating.

      2. In some situations, while the pre-collision brake function is operating, operation of the function may be canceled if the accelerator pedal is depressed strongly or the steering wheel is turned and the system determines that the driver is taking evasive action.

      3. A large amount of braking force is applied while the pre-collision brake function is operating. Additionally, as the operation of the pre-collision brake function will be canceled after the vehicle has been stopped for approximately 2 seconds if it is stopped by the operation of the pre-collision brake function, the driver should depress the brake pedal as necessary.

      4. If the brake pedal is being depressed, the system may determine that the driver is taking evasive action and possibly delay the operation timing of the pre-collision brake function.

      5. While driving, such as when driving through a railway crossing, the system may determine that the possibility of a collision with an object, such as railway crossing barrier, is high and operate the pre-collision brake function. To move the vehicle in an emergency, such as if the system operates in a railway crossing, perform the following operations and then take the necessary measures to ensure your safety.


        • If the vehicle has been stopped, depress the accelerator pedal.

        • If the vehicle is decelerating, fully depress the accelerator pedal.

        • Disable the pre-collision system.

    3. When to disable the pre-collision system


      1. In the following situations, disable the system, as it may not operate properly, possibly leading to an accident resulting in death or serious injury:


        • When the vehicle is being towed

        • When your vehicle is towing another vehicle

        • When transporting the vehicle via truck, boat, train or similar means of transportation

        • When inspecting the vehicle using a drum tester such as a chassis dynamometer or speedometer tester, or when using an on vehicle wheel balancer

        • If the vehicle cannot be driven in a stable manner, such as when the vehicle has been in an accident or is malfunctioning

        • When the vehicle is driven in a sporty manner or off-road

        • When the condition of the tires is poor and they do not perform well

        • When tires of a size other than specified are installed

        • When tire chains are installed

        • When a compact spare tire or an emergency tire puncture repair kit is used

    4. To avoid malfunction of the pre-collision city sensor


      1. Observe the following precautions. Otherwise, the pre-collision city sensor may not operate properly, possibly leading to an accident resulting in death or serious injury:


        • Keep the windshield glass clean at all times. If the windshield glass is dirty or covered with an oily film, water droplets, snow, etc., clear the windshield glass. If the inner side of the windshield glass in front of the pre-collision city sensor is dirty, clean away the dirt.

        • Do not attach objects, such as stickers, transparent stickers, etc., and so forth, to the outer side of the windshield glass in front of the pre-collision city sensor (shaded area in the illustration).

          A002JU0E03
          Text in Illustration
          *a From the top of the windshield glass to approximately 10 cm (4.0 in.) below the bottom of the pre-collision city sensor *b Approximately 20 cm (7.9 in.) (Approximately 10 cm (4.0 in.) to the right and left from the center of the pre-collision city sensor)

        • Do not install or attach anything to the inner side of the windshield glass under the pre-collision city sensor (shaded area in the illustration).

          A002JQJE01
          Text in Illustration
          *a Approximately 10 cm (4.0 in.) (Starting from the bottom of the pre-collision city sensor) *b Approximately 20 cm (7.9 in.) (Approximately 10 cm (4.0 in.) to the right and left from the center of the pre-collision city sensor)

        • If there is a large difference in temperature between the inside and outside of the vehicle, such as in winter, the windshield glass is likely to fog up easily. If the part of the windshield glass in front of the pre-collision city sensor is fogged up or covered with condensation or ice, the PCS OFF warning light may flash and the system may be temporarily disabled. In this case, use the windshield glass defogger to remove the fog, etc.

        • If the area of the windshield glass in front of the pre-collision city sensor is covered with water droplets, use the windshield glass wipers to remove them. If the water droplets are not sufficiently removed, the performance of the pre-collision city sensor may be reduced.

        • If water droplets cannot be properly removed from the area of the windshield glass in front of the pre-collision city sensor by the windshield glass wipers, replace the wiper insert or wiper blade.

        • Do not attach window tinting to the windshield glass.

        • Replace the windshield glass if it is damaged or cracked.

        • Do not install an antenna in front of the pre-collision city sensor.

        • Do not get the pre-collision city sensor wet.

        • Do not allow bright lights to shine into the pre-collision city sensor.

        • Do not dirty or damage the pre-collision city sensor. When cleaning the inside of the windshield glass, do not allow glass cleaner to contact the lens. Also, do not touch the lens.

        • Do not subject the pre-collision city sensor to a strong impact.

        • Do not change the installation position or direction of the pre-collision city sensor or remove it.

        • Do not disassemble the pre-collision city sensor.

        • Do not install an electronic devices or devices that emit strong electric waves near the pre-collision city sensor.

        • Do not modify any components of the vehicle around the pre-collision city sensor (inside rear view mirror, dun visor, etc.) or ceiling.

        • Do not attach any accessories that may obstruct the pre-collision city sensor to the hood, front grille or front bumper.

        • If a surfboard or other long object is to be mounted on the roof, make sure that it will not obstruct the pre-collision city sensor.

        • Do not modify the headlights or other lights.

        • Do not attach anything to or place anything on the instrument panel.

    5. Pre-collision city sensor

      CAUTION:

      The pre-collision city sensor uses lasers to detect vehicles ahead of your vehicle. The pre-collision city sensor is classified as class 1M laser product according to the IEC 60825-1 standard. Under normal usage conditions, these lasers are not harmful to the naked eye. However, it is necessary to observe the following precautions. Failure to do so may result in the loss of eyesight or severe visual impairment.


      • To avoid hazardous laser radiation exposure, never attempt to disassemble the pre-collision city sensor (e.g. remove the lenses). When disassembled, the pre-collision city sensor is classified as a class 3B laser product according to the IEC 60825-1 standard. Class 3B lasers are hazardous and pose a risk of eye injury under direct exposure.

      • Do not attempt to look into the pre-collision city sensor with a magnifying glass, microscope or other optical instrument within a distance of less than 100 mm (3.9 in.).

        A002JT5E01
        Text in Illustration
        *a Laser Classification Label *b Laser Explanatory Label
        Laser Emission Data
        Max average power 45 mW
        Pulse duration 33 ns
        Wave length 905 nm
        Divergence (Horizontal X Vertical) 28°x 12°

    6. Ignition Switch Expressions


      1. The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

        Expression Ignition Switch (Position) Engine Switch (Condition)
        Ignition Switch off LOCK Off (Lock)
        Ignition Switch ACC ACC On (ACC)
        Ignition Switch ON ON On (IG)
        Engine Start START On (Start)