We will repair or replace the ABS ESP ABR unit with W221, W204, W207, W216, GLK Mercedes.These vehicles are equipped with a new intelligent motion stabilization system called ABR.
What is ABR?
ABR (ADAPTIVE BRAKE) is the abbreviation for the adaptive braking system on the Mercedes S-C-Cl-class.The generation of the control system, which appeared after 2005, has a more accurate electronic filling, complements the capabilities of the ESP and BAS systems with hill-start assistance and HOLD, which protects the car from spontaneous rolling.Since 2007, ABR has been installed on C-class cars in w204 and w207 bodywork , GLK-class in X204 body, since 2005on CL-class in w216 body, S-class in a w221 body. Control units and systems are structurally different, but they are characterized by similar defects. The electrical part of the block looks like this:
Main control unit number
written on its plastic cover, starts with the letter "A", you need to look for another block on it (photo on the left).
ABS ESP control unit Mercedes C-class and S-class, location on the car. (photo on the right)
On these cars, problems with the brake system are not uncommon. In any case, you need to start with computer diagnostics of the brake system, namely, at least by reading error codes. Next - we will indicate a list of common errors in the control unit, which will make it easier for you to diagnose problems.
What is the cause of the brake failure on 221 S- class,204 and 207C- class, 216 CL-class?
Often this is the fault of the ESP control unit, which is designed with an insufficient margin of safety.note thatmost of the errors are deciphered as an internal malfunction, but the numbers of these errors are different, as well as the defects in the electronic part itself are different.As part of seven years of experience with ESP units on Mercedes in bodies W 221, W 204, W207, W216, we have identified over a dozen (!) of all kinds of malfunctions associated with internal errors in the block.
The following messages signal a system malfunction, if you have them, the car needs electronic diagnostics:
1) "EBV, ABS, ESP do not work, see the "Manual" - this is a message or the ABS, ESP, steering wheel, C-class lights come on on the instrument panel.
2) Tire pressure drop alarm does not work - power steering failure is often an indication of a system defect.
Basic MistakesESPBASABS- CL- S- SL- class, which are read during diagnostics (permanent or saved). The same error codes are deciphered in almost the same way, but the system failures are different, the errors are grouped:
5779 5780 5795 5796 5871 5952 5953 5970 5971 -
5002 5003 5004 5005 5006 5007 5008 5009 5069 5071 5090 5461 5462 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5891 5905 5906 5907 5909 5911 5934 5936 5944 5945 5946 5947 5979 5980 5981 - Internal fault in control unit N47-5 (ESP control unit).
5059 5061 5212 5775 5776 5781 5783 5784 5786 5787 5791 5792 5797 5798 5799 5802 5803 5825 5826 5865 5866 5869 5870 5937 5948 5951 5954 5955 5956 5961 5962 5963 5964 5965 5966 5968 5969 5972 5974 5975 5977 - Component "A7/3 (traction control hydraulic unit)" has an internal error.
5014 5075 5076 5077 5078 - Check the PML valve assembly.
5062 5063 5064 5065 5216 5217 5218 5219 5220 5221 5223 5908 5910 5079 5080 5081 5082 5083 5084 5086 5087 5088 5089 5091 5092 5093 5094 5867 5868 - Check component A7/7y (BAS solenoid valve) for fault, short circuit, plausibility.
5100 5101 5102 5103 5104 5105 5106 5110 5111 5112 5113 5114 5115 5116 5120 5121 5122 5123 5124 5125 5126 5130 5131 5132 5133 5134 5135 5136 - Error on the speed sensor. Check sensor. L6/1-2-3-4
5095 5150 5151 5152 5160 5161 5162 5350 5351 5352 5355 5401 5402 5404 5620 5752 5753 5754 5755 5757 5758 5815 5816 5817 5818 5863 5912 5913 5914 5915 5916 5917 5918 5919 5920 5921 5922 5923 5929 5930 5931 5940 - Check component B24. Fault. Component "B24/15 (speed, lateral and longitudinal acceleration sensor)" has an internal error. A7/7b (BAS Diaphragm Displacement Sensor) Electrical fault
5060 5066 - Power supply of the block of pressure and evacuation pumps.
5067 5068 - Control unit: Sensor wire.
5070 - Control unit: Voltage sensors.
5170 5173 5174 5190 5938 5939 - Steering angle sensor N49.Check.
5195 - Implausible regulation of ESP: regulation time > 15 s.
5230 - Incorrect running test: The brake was not applied.
5400 - Check on the fly: The turn was not completed during the check on the fly.
5410 - Check on the go: ACTIVE.
5412 - Check on the go: The ESP button may only be pressed when the vehicle is stationary.
5413 - On-the-fly test: Timed out while cornering (set time: 20 s).
5450 - Roller test bench mode is activated.
5600 - Engine control unit not identified or incorrect engine control unit.
5603 - On-the-fly check: The preconditions for on-the-fly check are not met.
5871 - Check the brake system for leaks.
5896 - Wrong variant coding.
5935 - PML: The encoding is incorrect.
If you doubt what is wrong with the car, and there is no way to deliver the car to us for diagnostics, take a working unit from us “for testing”. In these units, the electronic part is separated from the hydraulic part and looks like this on the reverse side
What is the characteristic defect of the ABR ESP electronic unit on w216, w221, w204, w207, x204 bodies Mercedes?
After examining more than 500 cases of car owners contacting us, we have identified the following recurring nuances:
1) The car reports a malfunction in the brake system.Often, an emerging problem is signaled by the ABS, ESP lights, steering wheel, tire pressure, which are also indicated by messages on the display.Associated with this system is the PML function (change of effort on the steering wheel, in proportion to the speed of the car), power steering. Therefore, in the event of a malfunction in the brake system on a Mercedes, the steering wheel becomes heavy. In all cases, the car declares a malfunction of the brake system.
2) The malfunction is intermittent, the ESP ABS errors light up only in cold weather. Neredwhen the lights go out after 2-3 start cycles, the messages disappear, and the owners of the car continue to operate it.
Everything is like with human health - the sooner you see a doctor, the easier it is to treat. But it can be very difficult to explain to the owner of a Mercedes that the longer he drives with a problem, even after it seems to disappear, the more difficult it will be to restore the ESP control unit. In most cases, the car claims a malfunction of the brake system.
3) The error occurs only at a certain speed.Malfunctions on the S-class occur in different ways: the ABS ESP lights come on only once in a certain period of time, for example, once a week / month or every 2nd start. Sometimes the errors are deleted, the car starts and works fully, and only when accelerating more than 20 km / h, all the lights come on, and an ABS error appears. Much less often, but still there is such a defect when an error occurs only at a certain speed.
The electrical and hydraulic parts of the ABS have different catalog numbers, but it’s quite difficult to get confused here, the main Mercedes number begins in both cases with A221 or A204, because. blocks, there are several different configurations, not all numbers are interchangeable, and even if you find a block with exactly the same number, it will most often still have to be programmed, because. there is someone else's VIN number and the system configuration can be different - an error will burn or the ABS will not work properly. In the photo below, the block is assembled, one number is on the plastic, the other is on the white label of the cylinder.
Block ABR w221 electric and hydraulic part.
How to remove the control box ABSESPWithMercedes?
The ABS unit is located near the headlight, on the right. If the suspicions are confirmed, and the ABS unit is faulty on your car, in most cases, there is no need to remove the entire hydraulic part with the electronic unit. You can get more detailed advice on withdrawal by phone. As can be seen from the decoding of errors, there are a lot of similar ones and it is easy to get confused about what exactly went wrong.
With a long head, you can unscrew the four screws located around the perimeter of the plastic part and get it from the valve block. Next, the metal part is separated from the electronic unit, in which, most likely, the defect lies. We can either replace the unit or repair it. In this case, it is worth remembering the cases when the malfunction is in the mechanical part too. In any case, consult with a specialist!
Remember that with the ESP unit removed, the car cannot be removed from the parking lot! That is, the car cannot be moved under its own power until this block is installed on it!
The most common abs esp errors on the Mercedes C-class, GLK w204 x204:
5001, 5944, 5945, 7266 - (Electronic Stability Program control unit) internal fault; (Electronic motion stabilization control unit) internal error.
The most common errors on abs esp Mercedes S-class w221:
5905, 5906 - (Electronic Stability Program control unit (ECU ESP) internal fault; (Internal malfunction in the control unit (ESP control unit).
The same error codes are decoded almost the same, but the internal failures of the unit are different and unimportant for diagnostics, the errors are grouped.
Many faulty ABS units can be restored, and after our repair they will serve you for more than one year. However, we will not be able to help if someone has already opened the block and tried unsuccessfully to repair it. Especially when it comes to more complex blocks after restyling, yes Mercedes is constantly changing blocks, both old and new are not interchangeable, in the photo below a block from the W204 X204 GLK of a new type.
ABS GLK and W204 control units after restyling. The numbers start with 172.
If the ABS unit on your Mercedes has failed, there are three ways to solve the problem:
1) contact dealers for a new unit;
3) repair the "native".
Much more preferable than the first two options is the repair of the “native” control unit in a specialized laboratory using dealer equipment, which is handled by experienced personnel, in addition, we give a guarantee for our work from 6 months!
At the same time, it is categorically not recommended to turn to self-taught garage masters who repair everything from cell phones to Boeing electronics, making repairs, as they say, “on the knee”. Of course, in this case, we are not even talking about any reliability! Blocks on 221 restyling are also changed as on 204, in the photo below the next generation of blocks
ABS ESP W221 control units of a new type, after restyling. Aluminum cover.
We offer:
A) reprogramming blocks.TMS processors are installed in ABS, protected from reading and having a data encryption algorithm using a crypto-mask, we encode and bind bu control units that were not originally installed on this machine.
B) high-precision soldering mode and the necessary components are available.The latest modification of the blocks has a processor in a BGA package, we perform their installation and dismantling at a special induction soldering station, we can replace any defective element, solder any serviceable element to replace the defective one.
C) accumulated experience and technology.The electronic board of the unit contains up to 32 layers of current-carrying tracks, so if the defect lies in the board itself, we are able to examine it using an expensive fluoroscopy method and involve contractors from the military-industrial complex plants for repair.
At the moment, dealers have very high prices for new blocks, in addition, you will have to leave the car with them for up to 14 days.If you buy a used block, then you will need to tie it to the car, even if the block numbers match, which also costs money. At the same time, no one can give you a normal guarantee, since the blocks fail very often!
What Mercedes owners face during garage repairs:
A) hope for the Russian "maybe"
Most of these specialists are simply unable to reprogram the unit for the desired machine or update the program after repair due to lack of necessary knowledge and equipment. If the equipment, year and part of the VIN code match, then they are sure that this will not require reprogramming and linking the unit.
B) a soldering iron made in China
For some reason, the "kulibins" are simply trying to solder the block, believing that it will start working. Then the owner of the car loses time and money, because the block after such an intervention becomes completely unrepairable.
B) lack of experience
While our laboratory has been successfully repairing electronic control units for about 20 years, garage craftsmen who are trying to earn extra money quickly do not have the necessary experience, education, technology and equipment, which has a deplorable effect on the quality and results of repairs.
Turn to professionals, do not take unnecessary risks in pursuit of seeming simplicity and cheapness! After all, the brakes are one of the most important systems of the car, on which your safety directly depends!
The stability control system in your car can play a key role in saving your life in the event of an emergency. System of exchange rate stability or as it is also called dynamic stabilization system maintains the controllability and stability of the machine, calculating in advance the possibility of a critical situation and eliminating it.
History of ESP creation
1995 could be considered the year of creation of the ESP system, even if only two years later it declared itself more loudly, at the time of the debut of the first compact microvan from the company mercedes benz called A-class. During the design of this model, a number of very serious mistakes were made, which greatly affected the car's tendency to roll over when performing maneuvers, even at low speed.
In Europe, where the pedantic people have long been "turned" (in a good way) to security, a serious scandal broke out. The production of Mercedes-Benz A-class cars was temporarily suspended, and cars that had already been sold were recalled for troubleshooting. - withdrawn to correct deficiencies. Engineers Daimler-Benz seriously "grabbed their heads" and began to solve this difficult task.
How, in this car, beloved by the consumer, to solve the problem with its stability, and at the same time without redesigning it. And, voila! The beginning of 1998 was marked by the solution of this problem. A-class cars from the company -Benz equipped with a suitably tuned ESP system.
In addition to A-class models, Mercedes S-class, E-class and others are equipped with the ESP system as standard. These vehicles use ESP and exclusively from the undisputed leader and favorite in this area - Bosch. ESP systems from Bosch are also installed on such giants as Porsche, Volkswagen and many others.
Operating principle
The main task of the electronic stabilization system ESP lies in the alignment of the vehicle in the direction of the direction of the front wheels. A car equipped with ESP contains:
Sensors that determine its position in space;
Wheel rotation sensors;
The sensor that determines the angle of rotation of the steering wheel;
The pump that controls the brake lines of the wheels;
ECU - electronic control unit. It polls each of the wheel sensors at an astounding rate of up to 30 times per second. The ECU also accesses the steering wheel and axle turn sensors - Yaw Sensor.
The ECU processes data from all control sensors. If they do not converge, ESP forcibly takes control of the fuel supply and the braking system, aligning the car in the direction of the front wheels. What matters is that electronics are not that smart to know where the safest part of the road is next, so you have to steer the wheels yourself, thereby helping the ESP do the rest of the work.
At first glance, it may seem that experienced drivers do not need to use the help of this system, because in an emergency they can rely on their skills, confidence and experience. But this is a big misconception! In an emergency, ESP correctly regulates the fuel supply and selects the right wheels to brake, which are needed to stabilize the car.
If there is a situation that the front wheels are drifting because corner entry has determined the car to be oversteered, the ESP system will apply the rear brakes by braking the wheel that lies on the inside radius of the turn. This action will align the "front" of the car, leaving for demolition.
The opposite case may also occur, when the car is poorly controlled and slip occurs in a turn with the rear of the car skidding. In this situation, the ESP system applies the front brakes, braking the wheel on the outside of the turn.
Some drivers find that ESP interferes with driving. We want to refute this and prove that it is 100% wrong. Firstly, in any case, a person with all his controlled physical abilities (now we are talking about ordinary people without any phenomenal abilities: radiation, radioactive spider bite, etc.) cannot act the way ESP electronics do. Secondly, an elementary test of one's strength on an ice training ground You will immediately be convinced otherwise.
At high speeds, the chances of not flying off the track are much greater for cars equipped with ESP than without it. Thirdly, people who believe that the stabilization system is superfluous in a car simply violate elementary physical laws, not knowing the principle of ESP operation. Just enough to understand the main principle of ESP, in practice to change your mind to the opposite.
The developers claim that there can be no such situations on the road where ESP can harm, only hopeless ones can happen.
ESP device
Structurally, ESP consists of a system of sensors located on the axles and steering gear that control the position of the vehicle on the road. In addition to sensors, ESP consists of:
Accelerometer, which determines the position of the car in motion;
The main controller, consisting of a pair of microprocessors with 56 KB of memory each.
The effectiveness of ESP lies in its use together with ABS, EBR and ASR systems that provide active vehicle safety.
Bosch- the world market leader in the production of ESP, added new useful properties to it, which are designed to increase the safety and comfort of the car. So ESP, at her request, can be equipped with the following subsequent functions:
1. Electric filling of the hydraulic system. In the event of a sharp removal of the foot from the accelerator, the system will conclude that an emergency situation is possible. In this case, in order to reduce the brake response time, the electro-hydraulic system itself decides to bring the pads to the discs.
2. "Self-cleaning" brake discs. In rainy weather, the working surface of the discs may be covered with a thin layer of water. So that this does not become a hindrance at the moment of emergency braking, pads will lean against the disc, removing a layer of water, in a certain period of time.
3. "Soft" stop. This feature is designed to make stopping smoother. This is achieved by systematically reducing the fluid pressure in the hydraulic circuits as the car stops.
4. Traffic control on uneven road surfaces. Prevents the vehicle from rolling on slopes when reversing.
5. "Stop-forward." This feature enhances cruise control by adjusting the distance to the vehicle in front. Guided by the information received from the sensors, the system can stop the car in traffic jams and analyze its further movement without the participation of the driver.
6. Braking automatically while parking. This is an electronic analogue of the "handbrake", which does not use separate wheel brakes. To activate it, it is enough to squeeze the brake to the floor by pressing the corresponding button of the electro-hydraulic module. This will give an action, give some command to keep the desired pressure in the circuits until a new order is received from the driver.
It is difficult to imagine what else craftsmen-engineers who create automotive systems can offer in the future, one can only guess and dutifully expect new "improvers" of safety and comfort.
Manufacturers
Electronic stability control systems are produced by such large manufacturers:
Robert Bosch GmbH is the largest manufacturer of ESP systems. Their release is established under the ESP brand of the same name.
Bendix Corporation
Continental Automotive Systems
Mando Corporation
Other names
The ESP electronic stability control system has a different name for different car manufacturers. Here are some examples:
ASC (Active Stability Control) and ASTC (Active Skid and Traction Control MULTIMODE) - Mitsubishi.
ESC (Electronic Stability Control) - Chevrolet, Kia, Hyundai.
ESP (Elektronisches Stability Program) - Chery, Chrysler, Fiat, Dodge, Mercedes-Benz, Opel, Daimler, Peugeot, Renault, Citroën, Volkswagen, Audi.
VSA (Vehicle Stability Assist) - Acura, Honda.
DSC (Dynamic Stability Control) - BMW, Jaguar, MINI, Mazda, Land Rover.
DSTC (Dynamic Stability and Traction Control) - Volvo.
ESP8266 miniature WiFi modules are quite attractive for smart home and home automation systems. They are also called "NRF24L01 killers".
I ordered later versions of ESP07 and ESP12 for myself, which are smaller and have more GPIO outputs, which does not require "hacks" to use additional I / O ports in them.
This module was developed by a Chinese company
Specifications:
- WIFI: 802.11 b/g/n with WEP, WPA, WPA2.
- Operating modes: Client (STA), Access Point (AP), Client + Access Point (STA + AP).
- Supply voltage 1.7..3.6 V.
- Current consumption: up to 215mA depending on the operating mode.
- Number of GPIOs: 16.
- Flash memory size 512kb.
- Data RAM 80 kb
- Instruction RAM - 32 kb.
I ordered modules in January.
Price - $3.78, - $4.24. Bought for an article review award. Arrived in 31 days in sealed bags 
ESP8266 ESP-07
ESP8266 ESP-12
Reviving the module took quite a long time
To do this, apply 3.3V to it. Moreover, the stabilizers of USB / UART converters do not draw this module by current, so external power is needed.
RXD, TXD and GND are connected through to the computer.
As a result, I assembled such a scheme on a breadboard 
Here I immediately encountered the following difficulty - the hole pitch of the ESP07 is 2mm, and not 2.5 like the pin connectors used in Arduino and other places.
I had to solder on the wires to the breadboard 
I immediately brought the RESET button and the GPIO0 jumper to ground, which puts the module into firmware download mode. And I brought power to the module through
After that, I launched the CollTerm program and at a speed of 9600 received a module invitation.
The AT+GMR command issued 0020000904 (SDK version 0020, AT version 0904)
For those who are too lazy, like me, to deal with AT commands, there is one that allows you to configure all this.
Did the firmware. Since this program only works with COM1-COM6, I had to change my COM33 from the USB / UART converter to COM6 in the device manager.
Further, the firmware is not difficult: open the port and connect. Speed is selected automatically. The main thing is not to forget to put GPIO0 on the ground (I have a special jumper for this). Speed is selected automatically. Sometimes the connection was not established. Pressing the RESET button during the connection helped.
Now you can connect to the module
In this program, you can load files for the LUA interpreter into the ESP, execute both single commands and scripts of this interpreter.
I was able to run a BMP180 pressure/temperature module connected to GPIO2 and GPIO0 
To do this, I downloaded the bmp180.lua file from the ready-made modules that come with the firmware from GITHUB
And then the init.lau file executed when the ESP8266 boots
tmr.alarm(1, 5000, 1, function() print("ip: ",wifi.sta.getip()) bmp180 = require("bmp180") bmp180.init(4, 3) tmr.stop(1) -- alarm stop end)
Running the program without a timer delay resulted in a permanent error.
After restart, code
bmp180.read(OSS) t = bmp180.getTemperature() p = bmp180.getPressure() -- temperature in degrees Celsius and Farenheit print("Temperature: "..(t/10).." C") -- pressure in different units print("Pressure: "..(p * 75 / 10000).." mmHg")
I gave out the current pressure and temperature to the console.
But I failed to launch the issuance of these parameters in the web server mode. It's all about lack of memory. Separately, the web server and BMP180 worked, but together they fell out into
PANIC: unprotected error in call to Lua API (error loading module "bmp180" from file "bmp180.lua": not enough memory)
Or just pieces of LUA code fell on the console.
Upgrading didn't work.
My further path was to build my firmware on a proprietary SDK, like . But that is another story. I can only say that the firmware is assembled without problems, but it was not possible to launch the ill-fated BMP180.
conclusions
- ESP8266 modules are a very low-cost solution for building a smart home network and other home automation using WiFi
- These modules are quite suitable for replacing NRF24L01 + in conjunction with Arduino and other "folk" controllers.
- To work as a standalone controller, the ESP8266 has few resources and rather raw firmware.
- Programming ESP modules is a rather time-consuming process that can scare off beginners.
- In general, ESP8266 have great prospects. I will wait for the development of firmware and development tools, but for now, I will use them in conjunction with other controllers (except)))
Electronic stabilization system ESP has long been an integral part of most cars, including economy class. But few people know how this system works, what it is for and whether you can rely on it. In this article, we will try to deal with this.
A bit of history
Back in the 90s, when leading car manufacturers began to massively equip cars with the ESP system, a scandalous incident occurred with Mercedes. On one of the tests, a brand new Mercedes A-class turned over - this served as an even more massive introduction of new items to new cars.
How the system works
The main task of the electronic stabilization system ESP is to align the vehicle in the direction the front wheels are pointing. The car is equipped with sensors for the position of the car in space, sensors for the rotation of all 4 wheels, a steering angle sensor, a pump with a separate control system for the brake lines of the wheels and an electronic control unit for all this.
The control unit polls 4 wheel rotation sensors at a frequency of up to 30 times per second. The angle of rotation of the steering wheel and the axial rotation sensor, or as it is called, are also interrogated. Yaw Sensor
All data is processed by the ECU and if this data does not converge, then the ESP intervenes in the brake and fuel system, which leads to the alignment of the car in the direction of the wheels. It is important to understand that the electronics do not know where to align the car and the only direction is the direction of the wheels. So we just have to put the wheels in a safe direction.
It would seem that this function is performed by the driver in an emergency and this system is not needed by confident drivers, but this is a delusion! The car in an emergency will selectively apply the brakes to those wheels that are needed to align the car, and proper fuel adjustment will help align the car by pulling the front drive axle of the car (or pulling the rear axle for rear-wheel drive cars).
Now false information that ESP interferes with driving. This is 100% false, since a person cannot use all the features of ESP. An elementary test on an ice range will prove it to you. At high speed, you are much more likely to stay on the road thanks to the stabilization system than without it.
If, nevertheless, you think that it bothers you, then you do not know the elementary laws of physics or do not know the principle of operation of the ESP. And to clarify the main principle: ESP aligns the vehicle in the direction the front wheels are pointing. You will still change your point of view through practice and experimentation.
As the developers say, there is no such road situation when ESP does harm, there are only hopeless situations.
Well, to consolidate information about the principle of operation of the electronic stabilization system ESP video:
A modern car is a complex system that combines many elements. Automakers in their struggle for comfort and safety are developing and implementing various new systems. Now one of the key systems in new models used to improve safety is the ESP system.
In simpler terms, this is a system of exchange rate stability. Almost no car, among those that roll off the assembly line in recent years, can do without this technology.
So what is it? And how does the ESP system work?
The answers to these questions will allow you to better understand all the features of the car, as well as greatly facilitate the operation process. After all, in order to get the maximum of what manufacturers offer, you need to understand what exactly you have to deal with.
Technology features
ESP (Electronic Stability Program) is a vehicle dynamic stabilization system. Sometimes there are other abbreviations, but this one is the most common. Various companies sometimes introduce their own designations. However, this fact does not in any way affect how the ESP system works.
Active introduction into production began in 1994 on top models. Now it has become quite accessible to everyone, so there is no direct dependence on the class of the car.
Why is this system needed?
Its main purpose is to increase safety in various critical situations, by increasing control of the vehicle's lateral dynamics.
Thanks to ESP, the car is much less at risk of skidding or slipping. The position of the car on the road is stabilized and the original directional stability is maintained even on difficult sections of the track and during turns.
From here came the colloquial name of the ESP system - "anti-skid".
However, not everyone understands how the ESP system works.
Principle of operation
The car usually has several such systems. In particular, we are talking about ABS - traction control system. They are closely interconnected. A separate control unit reads information from many sensors, on the basis of which this or that decision is made. Thus, ESP is only part of one single "organism" of the vehicle.
The control unit reads several parameters:
Wheel rotation speed;
Steering wheel position;
Pressure in the brake system.
Based on this, it is possible to obtain accurate and reliable information regarding how correctly and stable the position of the car on the road is.
But the most important parameters are given by two other sensors:
Angular speed sensor;
Lateral acceleration sensor (so-called G-sensor).
In the event of a risk of skidding, it is these two sensors that initially detect the beginning of side slip and determine the potential danger. After that, the control unit issues the necessary commands.
At this point, the ESP system already has the necessary information about how fast the car is moving, in what position it is, at what speed the engine is running, etc. Various sensors constantly capture this information. If the actual position of the car differs from the calculated one, then something is going wrong.
Further, the controller almost instantly processes the information and makes the necessary decision based on the programmed program. All this is aimed at automatically leveling the position of the vehicle on the road.
However, how exactly does the ESP system work? In other words, how does she manage to provide the necessary stability and save vehicles with drivers and passengers from falling into a skid?
After a decision is made, the vehicle unit automatically controls the rotation of the wheels. At this point, they begin to rotate out of sync. Some wheels slow down in relation to skidding, while others, on the contrary, are released.
This is where another element comes into play - the ABS hydraulic modulator.
As already mentioned, these two systems work inextricably with each other.
Now they meet quite complex ESP systems, which, for example, are even able to control the features of the operation of an automatic transmission. They work at any moment of the movement, so they are always ready to step into action. In some cases, motorists do not even notice how the ESP system works - it just gently corrects directional stability. Naturally, in many such situations, the driver is simply not able to quickly make the necessary decision, so it significantly increases traffic safety. Now many companies have begun to install such systems on their models, and motorists, in turn, look at their presence when choosing a vehicle for themselves and their families.
Video
A story about the ESP system in video format:
