What is a Pre-Collision Safety 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.

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.

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.

The system can be turned on and off at will. There is an additional pedestrian detection feature.

What is this

PCS is a preventive safety system that prevents the possible risk of a frontal or rear collision of the vehicle with other vehicles or other obstacles located in the direction of the vehicle or behind it. The pre-collision safety system alerts the driver of a possible collision. This allows you to avoid it or reduce the negative effect of the blow.

Other automakers not affiliated with Toyota have also developed systems similar to PCS. The principle of their operation, as well as possible malfunctions and ways to solve them, are in many ways identical to those used in cars of the Japanese manufacturer. However, only systems installed on Toyota and Lexus vehicles can bear the name PCS.

PCS system error

If the system is faulty, a light on the instrument panel will warn about this. Typically, an orange “Check PCS System Toyota LC 200” or “PCS” message will appear. There is no point in contacting service if the malfunction occurs because the radars are overheated or overcooled, they are dirty or covered with something and cannot read information.

In such cases, the “Check PCS System” light on the Toyota Land Cruiser 200 will soon go out and the system will be activated.

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.

For camera sensor:

• 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.

New requirements for coupling devices (towbars)

In the current traffic rules, coupling device malfunctions are described in a single paragraph 7.6:

7.6. The towing coupling and support coupling devices of the tractor and trailer link are faulty, and the safety cables (chains) provided for by their design are missing or faulty. There are gaps in the connections between the motorcycle frame and the side trailer frame.

In the draft new list of faults, an entire subsection is devoted to this issue:

6. Hitches

6.1. The coupling pin, pin socket, base plate, towing hook, towing ball are deformed or have tears or cracks.

Parts of coupling devices and their fastenings are missing.

6.2. Safety devices (chains, cables) on single-axle trailers (with the exception of spreaders) and trailers not equipped with a service braking system are faulty or missing.

Note. The length of the safety chains (cables) must prevent contact of the drawbar coupling loop with the road surface and at the same time ensure control of the trailer in the event of a breakage (breakage) of the towbar.

6.3. On trailers (with the exception of single-axle and loose trailers), the device that supports the drawbar coupling loop in a position that facilitates coupling and uncoupling with the tractor is faulty or missing.

6.4. The coupling loop or drawbar of the trailer has deformations that grossly violate their position relative to the longitudinal central plane of symmetry of the trailer, ruptures, cracks.

6.5. The bolted connections and fixing of the drawbar to the trailer, the coupling eye to the drawbar, the king pin and the reaction rod nuts are not tightened or secured.

The drawbar axle nut is not fully tightened and is not cottered.

The nut securing the drawbar coupling loop is not screwed in completely and is not secured with a lock washer and nut.

The kingpin lock washers do not secure the nut that is tightened to the fullest.

There is play in backlash-free towing devices with a towing fork for a tractor coupled to a trailer.

6.6. The coupling parts do not correspond to the dimensional specifications:

• The diameter of the coupling pin of coupling devices of semi-trailers with a technically permissible maximum weight of up to 40 tons must be in the range from the nominal, equal to 50.9 mm, to the maximum permissible, which is 48.3 mm, and the largest internal diameter of the working surfaces of the grips of the coupling device - from 50.8 mm to 55 mm respectively;
• the diameter of the coupling pin of coupling devices with a wedge lock of semi-trailers with a technically permissible maximum weight of up to 55 tons must be in the range from the nominal, equal to 50 mm, to the maximum permissible, which is 49 mm, and for semi-trailers with a technically permissible maximum weight of more than 55 tons - in the range from nominal, equal to 89.1 mm, to the maximum permissible, equal to 86.6 mm;
• the diameter of the towing hook throat of the hook-loop towing system of the tractor, measured in the longitudinal plane, must be in the range from the minimum, which is 48.0 mm, to the maximum permissible, equal to 53.0 mm, and the smallest cross-sectional diameter of the coupling loop rod — 43.9 mm, up to 36 mm, respectively;
• the diameter of a kingpin of a standard size of 40 mm of backlash-free towbars with a tractor traction fork must be within the range from the nominal, which is 40 mm, to the minimum permissible, equal to 36.2 mm, and the diameter of a kingpin of a standard size of 50 mm is within the range of the nominal, which is 50 mm, to the minimum allowable, equal to 47.2 mm. The diameter of a replaceable insert with a standard size of 40 mm for a trailer drawbar must be in the range from the nominal, which is 40 mm, to the maximum permissible, equal to 41.6 mm, and the diameter of a replaceable insert with a standard size of 50 mm - in the range from the nominal, which is 50 mm, to the maximum permissible, equal to 51.6 mm;
• The diameter of the ball of the towbar of passenger cars must be in the range from the nominal, equal to 50.0 mm, to the minimum permissible, equal to 49.6 mm.

If we talk about the new section as a whole, its content largely repeats section 6 of Appendix No. 8 to the Technical Regulations of the Customs Union “On the safety of wheeled vehicles.”

So all the above requirements were already present in the legislation. It’s just that this time they were moved “closer” to ordinary drivers. After all, most drivers have never opened the technical regulations, but almost every car owner turns to the traffic rules from time to time.

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.

“TRC OFF” light on Toyota: How to solve the problem with traction control

Car owners often notice that the “TRC On” light is on. This is traction control. What this feature protects against and controls on modern cars, as well as what to do if “TRC Off” lights up, the reader will find in this article.

The traction control system first appeared in 1971 in America on such famous cars as Cadillac and Buick. It began to be used on luxury cars of the German brand Mercedes since 1987. After the 2000s, manufacturers began to include TRC in every car.

ADAPTIVE CRUISE CONTROL

Adaptive cruise control is equipped with Lexus' pre-collision safety system because... it uses the same millimeter wave radar. Like a conventional cruise control system, it maintains a preset vehicle speed and also, thanks to radar, recognizes a vehicle ahead that is traveling at a lower speed. The system then slows down by releasing the throttle or applying the brakes.

You can set a specific distance between your car and the car in front, and the system will automatically maintain this distance depending on the speed of the car in front. Once the road is clear of other vehicles, the adaptive cruise control will smoothly return to its original speed.

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.

Lexus RX, 2021 - 2021 (AL20), Start-Stop button

1. Security complex, serial number: E96 S001129102, M66 S002037623

2. IMEI, if the logs were uploaded via GSM:

3. Vehicle Information: Lexus Rx 300 2021 LHD PTS

4. Date and time marker:

5. What we do: Team at AZ DZ

6. What we expect: Launch

7. What’s happening: Engine starting and stopping (revolutions lost)

out of 10 attempts, 2 or 3 are successful.

8. Contact information: Anton, 89143295825, [email protected]

9. Settings file: not attached

Answers 10

What is the software version of the E96 unit?

What version of CAN software does it use?

What connections from the alarm are made?

Please attach the settings file and the E96 system log after an unsuccessful launch.

• Answer
• |

Lexus RX 300 2021. After training without the IMMO key bypass and implementation of launch via CAN, the parking sensors stopped working, error U1117 appeared in the comfort unit, start-stop unit and rear door control unit. The error is not cleared. The rest of the systems are working fine. The alarm is also ok. The error means that the connection with the intermediate module is lost. What could be the problem?

• Answer
• |

Are there no additional errors showing on the dashboard? Was the battery disconnected during installation? I recommend driving a car first. You need to accelerate the car to 60 km/h on a straight, flat section of the road.

• Answer
• |

After starting the engine, a message appears on the dashboard: the parking assistance system is not available. Cameras and movement path are displayed. I gave the car to a client, so I’ll find out later how things are going with the parking sensors.

• Answer
• |

Thank you for message. Please let me know the results of the systems after the trip.

• Answer
• |

I called the client and the problem resolved itself after the trip. Thanks for the help.

• Answer
• |

Lexus RX 450H 2021 LHD PTS

does not control the emergency lights according to the channel.

On a panda, 2 channel buses are connected so that everything works.

• Answer
• |

Hello. Thank you for message. Sent the information to the developers.

• Answer
• |

Lexus Rx 350 gasoline 2021 USA, does not start via channel (no reaction after the command), bypass via ikey and signal twice. It does not work with keyless blocking.

• Answer
• |

Hello. Cars for the American market have their own CAN bus protocols, which differ from cars on the European market.

I recommend starting with rechecking the SLP connections, checking the standard telemetry blocks and standard launch blocks.

SELECTION AND INSTALLATION OF ANTI-THEFT SYSTEM ON Lexus Nx

How to protect your Lexus Nx from theft? How to choose the right anti-theft system or car alarm for your car? These questions are more relevant now than ever.

It’s no secret that absolutely any car, new or used, in good technical condition, as well as outright “junk,” are stolen.

Some are stolen to order for subsequent alteration to suit other documents, while others are “sent” for “disassembly”, that is, to remove the most valuable spare parts from them.

The thing is that the volume of the market for used spare parts is comparable to the turnover of new ones. The reason for this is obvious; the cost of a new car part is sometimes several times higher than a used one.

Despite all the efforts of car owners to protect their cars from theft, they have been and continue to be stolen, and the huge selection of defense equipment does not provide complete and absolute protection.

Selecting anti-theft systems based on the make or model of the car is not an easy task!

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

Test drive Lexus GX vs Range Rover Sport: spontaneous confrontation

Yes Yes! In Russia, a car is not just a means of transportation; it demonstrates the social status of the owner. With the help of a car, a Russian shows what place he occupies in the hierarchy of society, how successful he is and what, despite the rules of the road and respect for neighbors downstream, he is allowed on the road and what is not.

A big car is always cooler than a small one. A big black car is cooler than just a big one. And a big black car with a pretentious logo and “beautiful” license plates is cooler than just a big and just black car. In Russian road realities, this is an axiom that is accepted by everyone, from the trolleybus driver to the deputies of the State Duma. And with which everyone, unfortunately, has come to terms.

This is especially obvious behind the wheel of both the Range Rover and the Lexus GX, even considering that the Lexus is not black at all, but a Range Rover in dealer stickers. Everyone makes way for the cars, trying to quickly get out of the way. In the left lane, no one honks at the back or blinks their headlights, and, if possible, carefully overtakes on the right. And turning on the turn signal when changing lanes almost immediately stops the lane you need to get into.

I’m sure that some people don’t need to read this test drive further - the previous paragraph is more than enough to start collecting money for any of these SUVs. It is more likely for those who have one hundred thousand dollars, which is exactly how much each of our “wards” costs, and is not expected in the foreseeable future.

So, Lexus GX. Probably one of the most controversial representatives of the luxury SUV segment. First of all, because it belongs to the dying segment of frame cars. And secondly, because it is, in fact, the most “sophisticated” configuration of the Toyota LC Prado. If in the two divisions of the Japanese concern the passenger models are very different even visually, then the SUVs are not much different, causing customers to ask a reasonable question: “Why, in fact, overpay?” By the way, we will try to answer this question clearly in the near future.

Visually, the GX is overwhelming with its massiveness, size and, most importantly, the front end of the body. The double trapezoid, which recently became the hallmark of all Lexus, is especially reminiscent of a bulldozer bucket in the design of this model. It feels like by pressing a button you can actually push it forward and down to clear snow debris. In general, stylistically, the Japanese have gone overboard, cramming so many different strokes and lines into just one front bumper that it all looks, perhaps, quite eclectic.

The Range Rover Sport is another matter. Here it is - an example of British style. The simplicity of the forms is so precise, and the decorations in the form of complex headlights and decorative elements are so organically woven into the image that the Range Rover, like an expensive suit, turns any man into a stylish gentleman who is always the center of attention of others.

Moreover, the “British” has the same related feature as the GX - it is too much like its “brother”, the large Range Rover. Only for the “Japanese” the relationship with Toyota is more likely to be a minus, and for the Range Rover, on the contrary, it is a huge commercial plus. Only experts will be able to distinguish the two Range Rover models in traffic, but in the price list they differ by one and a half times.