Pre-Collision System (PCS)

Working areas of sensors

PCS is a Pre-Crash Safety System, which is implemented on Toyota and Lexus cars. On cars of other brands, a similar system may have a different name, but their functions are generally similar. The system's task is to help the driver avoid a collision. This feature operates by sounding an audible signal and displaying a signal on the instrument panel when the PCS system detects a high likelihood of a frontal collision with another vehicle. In addition, if a collision cannot be prevented, it forcibly applies the brakes and tightens the seat belts. A malfunction in its operation is indicated by a warning lamp on the dashboard. To understand the possible causes of the PCS error, you need to understand the operating principle of the entire system.

Can seat belts be restored after an accident?

Main components of seat belts
The need to repair and restore seat belts after locking is relevant for almost all motorists who have ever been involved in an accident. The belt mechanism reacts to certain situations as if it were a traffic accident. This is either an accident and airbag deployment, or simply a high load on the device. At such moments, the squib built into the system is triggered. The device can also jam as a result of sudden braking.

If the straps are jammed and do not work, then they operate in accordance with the design features of the machine. In some car models, the spare part cannot be repaired and cannot be unlocked. The car owner has no other choice but to cut off the belt and install a new one instead. But in most vehicles, the products can be restored; their mechanisms can be repaired. Often in cars, during a collision, the systems fire both squibs in the front seats. Therefore, if you are eating alone and there is no passenger nearby, you should still check whether the strap works.

Other causes of belt failure

Strap blocking can occur for other reasons:

1. Natural wear and tear of products. As a result of prolonged use, the strap stops retracting. This is due to wear of both the belt itself and the locking mechanism or one of its elements.
2. The strap does not retract due to low negative temperatures or wear of the roller device.
3. The coil lock has broken down or the main device has failed.
4. The strap does not retract after it is detached, or it is jammed as a result of trying to fasten it.

User zhenya0164Wende in the video offers to familiarize yourself with the process of unlocking the belt in a Chevrolet Aveo T300.

Pre-crash safety system

The PCS's job is to detect a threat and prevent the vehicle from colliding with an obstacle on the road. If the impact cannot be avoided, then forced braking begins and the belts are tightened. If the PCS is not in working order, the light on the panel lights up. The cause of the malfunction may lie in any part of the system, so analysis is indispensable. The PCS Land Cruiser 200 error is often displayed due to problems with the sensors. You can solve them yourself if the problem is not a serious breakdown.

Execution technique

To carry out qualified repairs or replacement, you need to know how to remove the seat belt correctly. It may stretch out a little at first, but then stop moving.

There is no need to dismantle the chairs. Experienced car owners do not recommend touching the thin compartment with the spring. This applies to VAZ cars. The upper compartment of the block is opened by pushing the four pistons located at its corners with a screwdriver. As a result, the lid can be easily removed.

The machine must be placed on a level surface so that the belt does not become stuck when pulled out. In the axillary space we find a blue plastic box with a ball and a paw. Having removed the plastic part, you can see a metal element with teeth that act as a stopper. Dirt particles accumulate there, so everything needs to be cleaned. Next you need to lubricate the mechanism with anti-frost agents. If this method is ineffective, it is better to completely change the device by contacting a service center.

Some drivers slightly bend the copper tab, which is affected by the metal ball. You can change the entire assembly by purchasing a complete kit.

Main causes of failure

If the seat belt in your car does not extend, it means it is jammed. To troubleshoot, you need to understand how the mechanism works. Most likely, the blocker has failed. Inside there is a sensitive element in the form of a ball, which performs blocking. It moves with levers and engages with gears. If it retracts quickly, the flywheel exerts more force on the screw surface and blocks the ball.

When the lock jams, even slowly pulling the belt does not help. Let's look at the possible causes of breakdowns.

1. Most often, the belt does not extend due to excessive wear and tear on the locking system. This is due to failure due to wear of some parts of the mechanism. It’s good if such a malfunction is detected only when the driver is fastening it. It is more dangerous if the coil jams while the car is moving.
2. The device is blocked due to a traffic accident. The design of the blocking device is made in such a way that if there is a strong impact, the squibs that are installed on some car models can be triggered. In this case, the lock is completely jammed and there is no way to unlock it.
3. Breakage of some parts. There is only one way out - replace the defective parts or the assembly mechanism.

The driver may receive a signal that the seat belt is faulty. The type of signal depends on the vehicle model: in the form of a burning light or sound.

Coil problem

Modern seat belts are equipped with a special reel on which the belt is wound. It has a complex device that allows you to block the belt from being pulled out during a sudden jerk or a road accident. A problem may arise with such a reel if parts wear out, dirt gets in, starts to jam, or parts break.

In such cases, it is necessary to take immediate action, as this puts the driver and passengers in danger while driving. You can fix the problem yourself if you follow certain recommendations, which will be discussed in the following sections. But how can you check that the coil is working properly and that there are no problems before driving the car? There are methods for this.

Reasons for the Airbag light to come on

First, let's look at the main reasons that can lead to the Airbag light turning on.

Normal operating mode

It often happens that the Airbag light comes on even when the system has not detected any malfunctions, in the so-called. normal mode. The driver inserts the ignition key, starts the engine, the Airbag light comes on and the control unit begins checking the status of the entire system.

As a rule, the check is accompanied by periodic flashing of the Airbag lamp (but no more than 6 times). If the control unit does not detect any malfunctions, the Airbag indicator goes out until the engine is turned on again.

If malfunctions are detected in the system, the Airbag indicator will not go out, which indicates the need for additional diagnostics.

Replacement process

So that the procedure does not take much time, you need to prepare everything in advance:

• spanners;
• two screwdrivers;
• jack.

Step by step instructions

1. First, disconnect the battery and set your Toyota Corolla to the parking brake. Support the wheels to keep the machine securely in place.
2. Using a jack, lift the front of the car and place bricks under it, and then unscrew the bolts securing the right front wheel. The front wheel along with the bumper body kit can be removed.
3. Next, unscrew the spark plugs, and then remove all drive belts.
4. In the photo, the arrow marks the intermediate roller of the air conditioner drive belt; it needs to be removed.
5. If your Toyota Corolla is equipped with a cruise control actuator, then you need to unscrew it and move it to the side. After this, remove the cylinder head cover.
6. You need to place a stand under the engine, but it should not rest against the engine fluid drain plug.
7. Now you need to set the piston of the first cylinder to the top dead center of the compression stroke. After this, you will need to pry and pull out the inspection hatch cover; to do this, secure the flywheel in advance with a screwdriver so that it does not rotate. If someone helps you, then ask a friend to unscrew the crank pulley screw, since it will not be very convenient to do this yourself. The crank pulley disc itself should be removed without problems.
8. Remove the toothed belt covers. The timing belt flange must be removed, but before doing this, remember its location. In particular, the rolled part of the element must face outwards.
9. You will then need to use a wrench to loosen the idler pulley adjustment pin. The roller itself will need to be pressed inward so that it does not interfere, and the screw will need to be tightened again. The timing belt can be removed from the driven gear. In the photo, two arrows mark the motor mounting nuts; they need to be unscrewed. It is also necessary to unscrew the upper screw, marked with an arrow, and lower the motor, then pull up the lower part of the support and stretch the strap between its upper and lower sections.
10. Remove the belt from the drive gear and pull it out of the engine compartment. If the condition of the drive gear is not particularly inspiring, it must be replaced.
11. You will then need to mark the position of the element's top dead center on the gear and oil pump so that the new element will be installed correctly. All further installation and marking procedures must be carried out in reverse order. If you did everything correctly, then you will not have any problems with this.

Due to lack of experience, it is better to entrust such a procedure to specialists. As you can see, this process is not easy, it will take time and certain knowledge to complete. If you do not understand something after reading the instructions, then it is better to entrust your car to professionals. And do not buy low-quality belts from dubious auto stores. It is better to install official products from the manufacturer on your car. By buying a low-quality product, you are dooming yourself and your car to possible problems in the future, think about this before purchasing.

PCS error

An error in the PCS system is indicated to the driver by a warning lamp on the dashboard called Check PCS or simply PCS, which is yellow or orange (usually they say that the PCS is on). There can be many reasons for problems. This happens after the car's ignition is turned on and the ECU tests all systems to ensure they are working properly.

An example of an error message in the system

Possible malfunctions of the PCS system

Malfunctions in the Check PCS System can be caused by various reasons. In the following cases, the illuminated lamp will go out and the system will become available again when normal conditions return:

• if the radar sensor or camera sensor gets very hot, for example in the sun;
• if the radar sensor or camera sensor is too cold;
• if the radar sensor and car emblem are covered with dirt;
• if the area on the windshield in front of the sensor camera is covered by something.

The following situations may also cause errors:

• failure of the fuses in the power supply circuit of the PCS control unit or the brake light circuit;
• oxidation or deterioration of the quality of contacts in the terminal block of those that are associated with the operation of the pre-crash safety system;
• rupture or damage to the insulation of the control cable running from the radar sensor to the vehicle's ECU;
• a significant decrease in the level of brake fluid in the system or wear of the brake pads;
• low voltage from the battery, causing the ECU to regard this as a PCS error;
• radar offset and calibration.

Solution methods

The simplest method that can help at the initial stage is to reset the error information to the ECU. You can do this yourself by disconnecting the negative terminal from the battery for a few minutes. If this does not help, contact an authorized Toyota dealer or qualified and trusted technicians for help. They will reset the error electronically. However, if after resetting the error occurs again, you need to look for its cause. To do this, follow these steps:

• Check the fuse in the power supply circuit of the PCS unit for failure.
• On a Toyota Land Cruiser, you need to check the power on pin 7 of the 10-pin connector of the PCS unit.
• Check the contacts on the connectors of the blocks in the driver's and passenger's feet for oxidation.
• Check the seat belt ECU connector under the steering wheel.
• Check the integrity of the cable connected to the front radar (which is located behind the radiator grille). This problem often occurs in Toyota Prius cars.
• Check the brake light circuit fuse.
• Clean the front radar and the emblem on the radiator grille.
• Check to see if the forward radar has moved. If necessary, it must be calibrated by an authorized Toyota dealer.
• Check the brake fluid level in the system and the wear of the brake pads.
• For a Toyota Prius, an error signal may occur due to the fact that the original batteries produce too low a voltage. Because of this, the ECU erroneously signals that certain errors have occurred, including in the operation of the PCS.

Additional Information

In order for the PCS system to work properly, it is necessary to take preventative measures that will allow the sensors to function normally. For radar sensor:

Example of radar sensor location

• always keep the sensor and car emblem clean, if necessary, wipe them with a soft cloth;
• do not install any stickers, including transparent ones, on the sensor or emblem;
• do not allow strong impacts on the sensor and radiator grille; in case of damage, immediately contact a specialized workshop for help;
• do not disassemble the radar sensor;
• do not change the structure or circuit of the sensor, do not cover it with paint;
• Replace the sensor or radiator grill only at an official Toyota representative or at a service station that has the appropriate licenses;
• Do not remove the label on the sensor stating that it complies with the laws governing the radio waves it uses.

• always keep the windshield clean;
• do not install an antenna or stick various stickers on the windshield opposite the camera sensor;
• If the windshield opposite the sensor camera is covered with condensation or ice, use the defog function;
• do not cover the glass opposite the sensor camera with anything, do not install tint;
• if there are cracks on the windshield, replace it;
• Protect the sensor camera from getting wet, intense ultraviolet radiation and bright light;
• do not touch the camera lens;
• Protect the camera from strong impacts;
• do not change the position of the camera or remove it;
• do not disassemble the sensor camera;
• Do not install devices that emit strong electromagnetic waves near the camera;
• do not change any objects near the sensor camera;
• do not modify car headlights;
• If you need to secure a large load on the roof, make sure that it does not interfere with the sensor camera.

The PCS system can be forcibly disabled . To do this, use the button located under the steering wheel. Disabling must be done in the following situations:

• when towing your car;
• when your vehicle is towing a trailer or another vehicle;
• when transporting a car on other vehicles - automobile or railway platforms, ships, ferries, and so on;
• while lifting the car on an elevator with the possibility of free rotation of the wheels;
• when diagnosing a vehicle on a test bench;
• when performing wheel balancing;
• if the front bumper and/or radar sensor have been damaged due to an impact (for example, an accident);
• when driving a faulty car;
• when driving off-road or adhering to a sporty style;
• when tire pressure is low or the tires are too worn;
• if the car is equipped with tires other than those specified in the specifications;
• with chains installed on the wheels;
• when the car has a spare wheel installed;
• if the car's suspension has been modified;
• when loading the car with heavy luggage.

KDSS repair (fluid replacement, roll elimination)

Moderators: Dmitri S, flashLAV, snow1975

HELP deal with this problem. a complete description of KDSS diseases and how to eliminate them is needed. Thank you

It’s better to call +79213812172 or write I’m rarely on the forum

_______________________________________ The equipment in the hands of the Dirac is a pile of metal.

It’s better to call +79213812172 or write I’m rarely on the forum

Error 1779 is present both in the Kinetic Dynamic Suspension System (C1779/79, Zero point calibration of acceleration sensor undone, with this error the KDSS light should be on, it is not considered a malfunction), and in the Electronic Modulated Suspension & Rear Air Suspension System (C1779/79 , Crankshaft position sensor circuit, stored only in memory)

Maybe the error number is different?

Thank you all Y-DNA:M423+ P41.2- L161- mtDNA: H11

Maybe the error number is different?

_______________________________________ The equipment in the hands of the Dirac is a pile of metal.

Thank you all Y-DNA:M423+ P41.2- L161- mtDNA: H11

_______________________________________ The equipment in the hands of the Dirac is a pile of metal.

May be. Although I double-checked both “ALL DATA 2008” and “Mitchell 2008”, C1779 is the camshaft sensor signal.

Still, Toyota’s documentation contains some confusion. I looked at it for models older than 2005. - there is already an error number 1879, although further in the text it is again 1779 (see attachment)

And your path is correct, since if there is a calibration error, the KDSS light should be on, but they write that everything is fine. So, the science of contacts is foreva

Thank you all Y-DNA:M423+ P41.2- L161- mtDNA: H11

Source

How to properly wash and dry engine parts

Before you begin disassembling and repairing the engine, you need to wash it, and then disassemble it into its component parts, then wash and repair all the parts. You can use any basin to wash the block, but it will be more convenient for you if you use a welded pan with a metal grate inside. This not only makes the operation easier, but also significantly saves flushing fluid. Lighting kerosene cleans all parts well. It has low toxicity, has good cleaning properties and, in addition, after washing with kerosene, all parts dry quickly and do not have an oily film on the surface.

Then you should thoroughly clean the engine channels. To do this, you should stock up on brushes with strong bristles. To wash the channels under pressure, use a spray gun with a compressor or a rubber bulb with a thin base. After the engine is completely flushed, it should be thoroughly dried. Sheets of clean paper or old newspapers are suitable for drying parts. To prevent dust and dirt from getting on the parts during drying, they should be covered with a cloth. Moreover, this safety measure is mandatory if you dry the engine elements in the fresh air, which contains a small amount of harmful abrasive particles.

In addition, you must stock up on a sufficient amount of clean rags, cotton gloves, installation and measuring tools, and a waste container. If you arrange the repair area in advance and purchase all the important elements listed, preparing the engine for repair will be much faster and more productive. After all, it’s no secret that it is the details that play the main role when working with such a sensitive part of a car as its “fiery” engine.

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This is interesting: We tint the side windows of a car with film with our own hands

Airbag error resolution

Now let’s try to answer the key question of this article - What to do if the Airbag light comes on? What actions should I take?

• Check the operation of the system when the car engine is turned on. If the airbag indicator is working normally, there is nothing to worry about. If malfunctions are still detected, a complete diagnosis of the system should be carried out.
• To undergo diagnostics, the best option would be to go to a service station or car service center. System diagnostics are carried out using a special scanner, which reads errors in the system memory, then finds out the error code, and then determines how to eliminate them.
• The next stage is replacement or full repair based on identified faults.
• After all restoration work has been carried out, the final stage is to update the memory of the control unit for correct operation of the system.

If the Airbag indicator lights up, do not put off checking the system for too long, so as not to risk the safety of passengers and your own.

Do not forget about timely diagnostics and maintenance of the SRS Airbag system, which will make your ride safer and more comfortable in the future.

Source Source Source Source https://etlib.ru/blog/531-oshibka-sistemy-pcs Source Source Source Source Source https://autodromo.ru/articles/pochemu-zagoraetsya-lampochka-airbag-prichiny-neispravnosti-srs- sposoby-elimination

How PCS works

In Toyota SPB, it analyzes the situation on the road using scanning sensors: radar and camera. The first is behind the radiator grille, the second is behind the glass. Both devices operate by emitting electromagnetic waves and receiving their reflection. This is how the possibility of colliding with obstacles on the road is assessed and the distance to the object is calculated. The received information is processed and, if necessary, an alarm is issued. Usually it is sound and light. These two sensors assess the likelihood of a threat from ahead. There is also a third sensor in the rear bumper. Its task is to signal a possible attack from behind.

The process for preventing an emergency is as follows:

• When PCS sensors detect a threat, the first thing they do is sound an alarm;
• the driver slows down to re-analyse;
• if the speed is not reduced, and the risk of an emergency only increases, then the PCS forcibly brakes and tightens the seat belts;
• the PCS decision is based on factors such as sudden pressure on the pedals, the speed of the car, the serviceability of the system, the distance between the car and objects impeding movement;
• PCS is activated if the car is moving at a speed of 30 km/h or more, during heavy braking and only when the driver and passengers are fastened.

Operating principle and features of the PCS system

The operation of the Toyota PCS system is based on the use of scanner sensors. The first is a radar sensor located behind the front (radiator) grille. The second is a camera sensor installed behind the windshield. They emit and receive back electromagnetic waves in the millimeter range, assessing the presence of obstacles in front of the car and the distance to it. Information from them is fed to a central computer, which processes it and makes appropriate decisions.

Scheme of operation of PCS system sensors

The third similar sensor is located in the rear bumper of the car (Rear Pre-Crash Safety System), and is designed to signal the threat of a rear impact. When the system determines that a rear-end collision is imminent, it automatically tightens the seat belts and activates the pre-collision front head restraints, which extend forward by 60 mm. and up by 25 mm.

PCS sensor performance characteristics

If the PCS system determines that there is a high probability of a collision or an emergency situation, it gives an audible and visual signal to the driver , after which he must slow down. If this does not happen, and the likelihood of a collision increases, the system independently activates the brakes and tightens the driver and front passenger seat belts. In addition, the damping forces on the machine's shock absorbers are optimally adjusted.

Please note that the system does not record video or sounds, so it cannot be used as a dash cam.

In its operation, the pre-crash safety system uses the following input information:

• the force of pressing by the driver on the brake or accelerator pedal (if pressing took place);
• vehicle speed;
• state of the pre-crash safety system;
• information about the distance and relative speed between your car and other cars or objects.

The system detects emergency braking based on vehicle speed and deceleration, as well as the force with which the driver presses the brake pedal. PCS works similarly in the event of a side skid .

PCS is active when the following conditions are met:

• vehicle speed exceeds 30 km/h;
• detection of emergency braking or skidding;
• The driver and front passenger are wearing seat belts.

Please note that PCS can be turned on, off, and the collision warning time can be adjusted. In addition, depending on the settings and equipment of the vehicle, the system may or may not have a pedestrian detection function, as well as a forced braking function in front of an obstacle.

General information about the system

What is the KDSS system?

The KDSS system is a dynamic suspension stabilization system that provides comfort and maneuverability in difficult terrain and excellent handling on smooth roads. But since nothing lasts forever, such luxury cars sometimes require KDSS repairs.

How does the KDSS system work?

Structurally, there are two hydraulic cylinders on the front and rear stabilizers, which are interconnected by a hydraulic line through the valve control unit, on which two more cylinders (compensation tanks) are installed. When the car is moving on a straight and level road, the system is in passive mode, blocking the entire circuit, providing excess pressure on the front and rear stabilizers. This allows you to reduce the roll of the car when performing maneuvers, dive during acceleration and braking.

The system reduces the pressure in the hydraulic cylinders of the stabilizers (increases the suspension travel) only at the moment when the car moves on an uneven surface. Not all trim levels of Toyota Land Cruiser Prado 150, 4Runner and Lexus GX460 are equipped with this system.

Symptoms indicating a KDSS malfunction

• The KDSS error lights up (appears) on the dashboard
• The body of the Toyota Land Cruiser is tilted (skewed, tilted to one side)
• Strong lateral rolls appear when cornering
• Knocks in the suspension when turning the steering wheel

COLLISION PROTECTION

Our Advanced Pre-Collision Safety System is another unique technology designed to alert the driver to a potential collision and take appropriate action to reduce the risk of injury. The car is equipped with a millimeter wave radar that constantly monitors the road ahead of the car, as well as an auxiliary stereo camera that detects objects that the radar cannot detect (for example, pedestrians), and infrared spotlights that complement the camera's work at night.

There is a camera installed inside the car that monitors the driver's head position and can detect when the driver has turned away from the road. If a possible collision is detected, the system sounds a buzzer and momentarily applies the brakes to alert the driver and a warning appears on the instrument panel. If the risk of collision is high, the braking system is optimized to provide maximum braking force, the suspension is adjusted appropriately and the emergency steering system is prepared for quick manoeuvring. If a collision is imminent, the brakes are automatically applied and seat belts tightened to minimize possible damage.

GS's advanced collision-avoidance safety system also includes a driver fatigue sensor that can detect whether the driver's eyes are open and a blind spot monitor that uses radar in the rear of the vehicle to detect vehicles passing your vehicle in adjacent lanes. stripes, and a warning light on the outside side mirror. Lane Departure Warning warns you when you're drifting out of your lane, and Front Night Detection systems provide a clear picture of the situation ahead to the multifunction display to help you drive with confidence.

FAQ

Question: Where are the tapes sold?

Answer: In an online store. You can even use AliExpress. As a rule, the tapes from there are very durable, but they may look worse than those from official stores. One meter of a good colored belt will cost about 350 rubles.

Question: Is there a difference between goods from online stores and specialized centers?

Answer: In fact, there is no difference, but here is the case when it is better to trust official stores. Even if the chance that online stores will send you something of poor quality is small, but if possible, it is better to contact a specialized center.

Question: Should I replace it on a regular basis? Like oil, for example.

Answer: Of course, you need to check your seat belts, but not to the point of fanaticism. Have it inspected every few years, and if there are problems, try to fix them.

Kia Soul seat belt anchorage system

For maximum protection provided by the system, seat belts should be used whenever the vehicle is in motion.

Seat belts are most effective when the seatbacks are in the upright position.

Children 12 years of age and younger must always be properly restrained in the rear seat. Never allow children to ride in the front passenger seat. If a child under 12 years of age must be carried in the front seat, the child must be properly restrained and the seat must be moved back as far as possible.

Never wear the shoulder strap under your arm or behind your back. An improperly positioned shoulder belt can cause serious injury in the event of an accident. The shoulder strap should be placed over the shoulder and placed across the collarbone in the middle of the shoulder.

Do not place the seat belt over fragile objects. In the event of sudden braking or a collision, they may be damaged by the belt.

Avoid twisting the seat belts while putting them on. A twisted seat belt will not provide effective protection. In the event of a collision, it may even crash into the body. Make sure that the belt cord is not twisted.

Protect the belt cord or fastening from damage. If the belt cord or fastener is damaged, replace it.

Seat belts are designed for the skeletal structure of the body and should be located at the level of the pelvis, chest and shoulders, depending on the situation; Avoid placing the lap belt across the abdominal area.

To provide adequate protection, seat belts must be tightened as tightly as possible while maintaining occupant comfort. A loose belt will significantly reduce occupant protection. Make sure that the seat belt cord is not contaminated with varnishes, oils or chemicals, in particular battery acid.

Belts can be safely cleaned using a mild soap and water solution. If the belt cord is worn, dirty or damaged, the belt should be replaced

It is important to replace the entire assembly after the belt has been worn during a severe collision, even if the damage to the assembly is not noticeable. The belt straps must not be twisted during donning.

Each belt assembly should only be used by one occupant; It is dangerous to place a belt around a child sitting on a passenger's lap.

The user must not make changes or additions to the design that would interfere with the slack-relieving operation of the seat belt adjuster, and must not interfere with the adjustment of the seat belt assembly to eliminate slack.

When fastening your seat belt, be careful to secure it in the appropriate buckle and do not confuse it with the lock of the adjacent seat. This is very dangerous and the seat belt may not provide adequate protection during an accident.

Do not unfasten your seat belt or attempt to fasten or unbuckle your seat belt while driving. This could result in loss of control and an accident resulting in death, serious injury or property damage.

When fastening your seat belt, make sure that it does not hit hard objects or objects that could easily break.

Make sure that no foreign objects are caught in the seat belt buckle. Otherwise, the seat belt may not fasten properly.

Pre-Crash Safety System (PCS)

Lexus' Pre-Crash Safety System
(
PCS
) can help the driver avoid a collision. However, if a collision is unavoidable, the system can utilize cutting-edge technology to reduce damage and injury resulting from the collision.

On models equipped with Pre-Collision Safety, millimeter wave radar scans the road ahead for specific obstacles and continuously assesses the risk of collision. If the system detects a high-risk situation, it immediately notifies the driver with a warning buzzer and a red signal (BRAKE!). It also activates Pre-Collision Brake Assist, which can assist the driver by providing additional braking force.

If the system determines a collision is imminent, it activates the Pre-Collision Braking System, which can automatically apply the brakes before a collision to reduce the force of the impact. Pre-crash seat belts also activate, automatically tightening the front seat belts to reduce the risk of injury.