Repair of the KDSS system Toyota Land Cruiser prado 150
Our car service is located in Cherepovets, Vologda region. When making a phone call, pay attention to this, many calls from other regions ===
Many users of this car are not aware that they have such a system that allows you to reduce body roll in corners and increase suspension travel when off-road. After all, all its components are located at the bottom of the car, and it does not have control keys either, i.e. it works in automatic mode.
To tell the truth, such machines are not often repaired by definition, reliable, and we do not do maintenance, only repair electronic systems, so we ourselves had to study how it works. The system is a closed hydraulic circuit with valves and hydraulic struts that control both stabilizers lateral stability... The video shows the system in action.
But unfortunately, the day comes when she makes itself felt - on dashboard its malfunction lamp lights up - KDSS.
The valve block body is made of silumin, and under the influence of reagents from the road, it starts to corrode, the surface becomes uneven, and the sealing gum that protects the "electronic" part becomes powerless to moisture penetration.
All this bandura is, in theory, non-separable, sealed from the factory, and is now being sold at a price of 85tr. + Further fluid replacement and pumping of the system. I think it will be over a hundred.
So why not repair it) In general, everything worked out, restored the valve leads, removed the rotten connector, I had to solder a little, of course, everything was sealed and took measures so that this did not happen again, protected from direct ingress of dirt and water.
By the way, enough frequent problem after 3-4 years of owning this car. So ... ready for new clients.
Like all genius, KDSS is pretty simple. Liquid circulates in a closed loop with accumulators, valves and sensors, passing through two hydraulic cylinders connecting the anti-roll bars to the body. If the car is driving on a flat highway, all system valves are closed, and fluid loses the ability to move freely through the system. The pistons of the hydraulic cylinders are locked, and the stabilizers are rigidly connected to the body, which as a result prevents roll when cornering. When the car hits the broken asphalt, the accumulator valves open, compensating for the sudden changes in fluid pressure, which significantly reduces body vibrations.
On the off-road, the electronics turn off the stabilizers altogether. All valves are open, the pistons inside the cylinders are completely free, and the suspension is able to make maximum strokes, providing the best possible grip.
The driver does not have to go into the details of how the system works. He does not even need to bother switching modes - the electronic control unit itself knows what and when to do it. Those who had the opportunity to compare the behavior of cars with and without KDSS, unanimously declare that the system, they say, allows you to feel much more confident both off-road and on a good road. And there is nothing to say about turns: in a sharp bend and at a good speed, the help of hydraulics that supports the body in a horizontal position can be simply invaluable.
Developed in 2004, the system is highly reliable. As a rule, the owners of KDSS cars have no complaints about its work. You just need to remember to change the fluid after 60–80 thousand km and check the pressure balance, but certainly from dealers who have special equipment and qualified personnel for this. Otherwise, the system will simply stop “feeling the way”.
When it comes to safety, you shouldn't be trifling with trifles. Even a tangible, as it may seem at first, overpayment, in fact, is not such extravagance. The difference in price between Prado-Comfort without KDSS and the Elegance version equipped with it is considerable - 203 thousand rubles. However, this amount includes a lot of other options, without which the luxury SUV looks like an impoverished graph - xenon headlights, sill lights, roof rails, parking sensors, a rear-view camera, rain and light sensors, heated and electrically adjustable seats and much more.
WE HAVE DECIDED:
The electronically controlled system of kinetic stabilization of the suspension for an off-road vehicle is useful and necessary. Even if you are not a fan of jumping on boulders, it may well play a good service in a situation when you have to, say, sharply go around an obstacle that has arisen on the road - this is a great addition to ESP.
"Prado" has installed KDSS, which is a kinetic suspension stabilizer. Sometimes repair of KDSS "Prado 150" is required, which includes a number of features.
Toyota Land Cruiser Prado 150-series
The 150 series car has a number of features. First of all, they concern models with diesel engine... Together with powerful engines, a mechanical and automatic transmission works.
The dimensions of the SUV are impressive. The salon is spacious, which is suitable for big family or transportation of bulky baggage. Specifications allow you to use the car in city mode, on the highway or off-road.
For more comfort Toyota Land Cruiser Prado is equipped with KDSS.
What is it, KDSS on the "Prado 150", we will consider further in the article.
What is KDSS
The KDSS system on the Prado 150 is a kinetic stabilizer that ensures smooth movement and stability off paved roads. In simple words - stabilization of the suspension in off-road mode. It minimizes roll when cornering, making the ride as safe as possible.
KDSS is represented by a hydraulic device, controlled by electronics. As soon as the sensors give a signal about a change in the road surface, the system instantly rebuilds to suit the new conditions.
Structure:
- 1 hydraulic cylinder located in the front and rear stabilizer;
- 2 hydraulic circuits connecting the spaces of the hydraulic cylinders;
- hydraulic cylinders to support the front and rear stabilizer.
When the machine is tilted, the KDSS stabilizes its position, which prevents it from tipping over. During off-road driving, the pistons begin to move freely towards each other.
An experienced driver needs to understand, know well the KDSS system on the Prado 150 and what it is. This knowledge will help you repair the stabilizer if necessary.
Functions
The driver needs to know what it is - KDSS on Prado 150, but he won't have to go into the details of its work. This is because the device is completely electronically controlled.
Main functions:
- ensuring a smooth ride off-road;
- suspension stabilization under different driving conditions;
- ensuring safety in case of strong rolls of the car;
- improved stability in extreme conditions.
In the event of a malfunction, the computer displays an error. When the breakdown indicator comes on, it means that the system is not capable of fully functioning. Repair or replacement of parts is required.
Do you need KDSS or not: owner reviews
Toyota offers the installation of KDSS as an additional option. The price of the car depends on it. This innovative development is expensive, but for regular off-roading it is essential to ensure safety.
- Igor: “I bought Prado from KDSS. I can say that with KDSS the car drives better, stability is greater, off-road travel is smoother. There is something to compare with, a friend's “Pradik” without her, on a fishing trip all the brains on him were shaken out. I did not regret that I took just such a complete set, as I feel safe with any ride. It is worth, of course, this piece is expensive, I paid about 250 thousand rubles from the top for the car, but my own life and health are more expensive. I drove about 100 thousand km, there were no breakdowns ”.
- Andrey: "The first" Pradik "was pre-reystaling without KDSS, now I bought it with the system. I do not regret it, because the car turns into a turn much better, does not roll. The rigidity of the suspension is, of course, strong, horror on the bumps. I am satisfied with both options, the main thing is that the car does not break down and nothing knocks in it. ”
There were practically no negative reviews for the entire period of operation, all drivers were satisfied with the additional option.
Reliability, malfunction and repair
KDSS is reliable, but it has a number of features. On vehicles with the system, a defect was detected, which consists in a leak in the installation. Due to the accumulation of condensation on the dashboard, the malfunction icon lights up, the vehicle's controllability is sharply reduced, the device does not work properly. Code C1851 must mean that the sensor reading corresponds to a pressure not exceeding 0.9 MPa (9.2 kgf / cm 2, 130 psi).
Corrosion is found on the unit. Moisture gets on it from under the control valve body. After a while, corrosion destroys the entire device.
If there is KDSS on the Prado 150 and the indicator is on, what to do in this case, every driver should know. It is necessary to check for condensation and remove it. The reason for the error is in it, so the light came on.
To prevent breakage, lead the valve connector outward, additionally treat the block with a sealant. The usual procedure will protect against damage to the sensor.
Block replacement
If KDSS breaks down on Prado 150, repair is required. When condensate gets on the unit, corrosion appears, as a result of which it breaks. This is one of the common problems.
Oil seeps through the rotten metal. When such a block is disassembled, it breaks down and cannot be restored.
It is better to entrust the replacement of auto parts to professionals who will carry out the replacement and make the pumping without violating the factory characteristics.
The block is restored to its normal state. Experts will carry out diagnostics, clean the device, process it, bring the wires out and put protection against sand, moisture and reagents, and carry out adjustments.
The correct approach to the "Land Cruiser" will extend its service life by more than one year.
Whatever they say, but there are people whom the KDSS system apparently got, and there are craftsmen who amputate this system.Here is the report of one rugged man from the city of Krasnoyarsk.
The beginning of the year was marked by the end of the warranty for my restyled Prado. The day before, I made TO-60 with the replacement of stabilizer bushings in a circle. A week after the end of the warranty, a knock appeared and began to intensify rear suspension, after 10 days it became unbearable. Knowing about the problems in the reliability of KDSS (especially on restyling), in the hope that the shock absorber or some kind of silent block is jammed, I drive the car into a hole, the assistants swing the car while standing on the footrests, I find out with horror that it knocks rear cylinder KDSS. I am going to the dealer to bow, after inspection, the dealer declares that it is necessary to replace both cylinders even if the front one is in good working order, they have the following regulations. They announce the price of spare parts, replacement work, fluid injection and calibration ... the amount is about 150,000. I had to think about it. I know a person who changed 5200 mileage cylinders under warranty for the first time, and then two more times during the warranty period. The fact that Toyota knows about this sore, remade the cylinders three times, there were different part numbers of the cylinders, and without defeating the problem, Toyota chose to remove this system from the new cars of the main trim line, leaving it only at maximum speed. Therefore, I decided to remove this system. I have nothing against KDSS, the idea is good, but its reliability, coupled with the cost of replacement, has given it a verdict.
I studied the whole topic, on pages 53-54, the person explained everything in an accessible way, many thanks to him, everything is intelligible. I took his actions as a basis, slightly altered the drawings, added some points to the report a little.So, first of all, we purchase components from the "Comfort" package
Front stabilizer 4881160310 1 pc.
Rear stabilizer 4881260290 1 pc.
Front stabilizer bushings 4881560380 2 pcs.
Rear stabilizer bushings 4881860040 2 pcs.
Stabilizer clamp, front right 4882460190 1 pc.
Stabilizer clamp, front left 4882960120 1 pc.
Rear stabilizer clamps 4882360050 2 pcs.
Front bracket mounting bolts 91674G1028 4 pcs.
Rear bracket mounting bolts 91674F1020 4 pcs.
Front right stabilizer bar (link) 4882060050 1 pc.
Front left stabilizer link (link) 4881060040 1 pc.
Rear stabilizer struts (links) 4883060030 2 pcs.
Front link nut 9017912144 4 pcs.
Lower nut of rear links 9017912141 2 pcs.
Upper nut for rear links 9418300831 2 pcs.
End plate washer for rear links 9094802126 4 pcs.
Washer-plate intermediate rear links 9094802127 2 pcs.
Rubber bushing for rear links 4881736011 4 pcs.In a car shop we buy 8 pcs. nuts for front and rear clamp brackets, M10 threaded nuts are required, pitch 1.25. We take the nuts with a coating so that they do not rust and with a flange for a good connection.
Bolts for fastening clamps rear 91674F1020 can not be ordered and you can buy a bolt M10x25 in a car dealership, thread pitch 1.25. Bolt necessarily coated, bolt head with flange
Bolts of fastening of clamps-clamps front 91674G1028 can also be replaced with a bolt М10х35 thread pitch 1.25 with a coating and a flange. But these bolts are still better to order original ones, they are made of better quality, we will weld them with heads to the frame and in case of thread wear, replacing these bolts will be difficult and time consuming.
I ordered all the components at Avtodok, the most expensive parts are stabilizers. Before including them in the order, I rummaged through Avito and found what I was looking for in a new condition, original and for half the price. A man for himself mistakenly ordered stubs for a car with KDSS, but the usual ones came, he got rid of them with pleasure, I bought with pleasure. The rest of the small fasteners - ordered.
Next, I wanted to see how everything assembled looks like live on a factory-equipped machine with such stubs, I wanted to take the dimensions for the installation locations of the welded brackets and clarify the dimensions of the brackets, the drawings of which were laid out by the person earlier. I was more interested in the rear axle.
25.11.2017
Toyota Land Cruiser Prado 150
KDSS (Kinetic Dynamic Suspension System) does not work
A practical guide.
Step one.
To repair something, you need to know WHAT you will be repairing.
Therefore, we open the Internet, search, read, study:
Kinetic Dynamic Suspension System (KDSS)
https://www.youtube.com/watch?v=vxzWMO7uaJ8&feature=youtu.be
Toyota Land Cruiser 150 - KDSS (Kinetic Dynamic Suspension System)
https://www.youtube.com/watch?v=NLF6n3nMwww
KDSS on Land Cruiser 200
https://www.youtube.com/watch?v=jQyZPN6IrTU
The Kinetic Suspension Stability System (KDSS) controls the anti-roll bars to provide stability and a smooth ride off-road (off-road). In addition, the system minimizes roll when cornering. The system is hydraulic, but electronically controlled.
Receiving information from related sensors and depending on road conditions, this system can quickly change the characteristics of anti-roll bars
The KDSS system structurally consists of:
- one hydraulic cylinder located on the front and rear anti-roll bars
- two hydraulic circuits connecting the over- and under-piston spaces of the hydraulic cylinders
- hydraulic cylinders act as a support for the front and rear stabilizers... When passing sharp and high-speed turns on the asphalt, the pistons cannot move towards each other
- KDSS firmly bonds the anti-roll bars to the body and effectively combats vehicle roll
- when driving on difficult road terrain, the pistons move freely towards each other. The rigid connection of the stabilizers with the body disappears, thereby the suspension works more freely.
Step two.
I doubt that you have so much time that you will want to spend it on a professional study, for example, the constructive component of the KDSS system:
On, on the Internet and beyond, the following expression very often comes across: "Electronics is the science of contacts." Therefore, I propose to move on to the next step ("step two" - awareness of the understanding that "everything complex begins with the simplest").
Step three
Since you already roughly know the structure of the system and can roughly identify the main components of the system, start with the most difficult thing in the simplest way - with managing the system.
But do not think about simple or deep electronics, repairing the KDSS system is elementary! Look under the body. Define one of the main subjects related to the KDSS system, here it is:
In the photo you can see the removed connector. Do not be too lazy to look inside, there may be something extremely interesting there - let's take a look! And we see:
We see nothing here. But we don't get upset and don't give up. In addition to this connector, there is also a "mating" connector. We look in and see:
Did you see? Let's get closer, so as not to be mistaken and to have a reason for joy and pride:
This is the so-called "green", in other words "oxidation", that is, the cause of the malfunction has been found.
As you can see, a malfunction of such a complex system as KDSS has been found, and it will not take long to fix it if there is the right hands and brains.
In the same way, you can easily repair other, most complex systems and devices, ranging from the malfunction "engine interruptions" and ending with the C2540 error hybrid car Prius.
The main thing is to read more of the Internet. The Internet has it all.
Who knows, maybe you will be lucky enough to fix the C2540 error in a hybrid car by cleaning or replacing certain contacts in a certain place?
Remember that studying electronics, knowing Ohm's law and other wisdom is a completely unnecessary activity for someone who has firmly understood that "electronics is the science of contacts" and "car diagnostics is very simple!"
The main thing to know:
- where this contact can be located
- whether this contact is related to the problem that causes a specific malfunction
- what malfunctions this contact can provoke during oxidation
- whether any contact is the "cause" of the malfunction, or this contact is the "consequence"
- what tools are needed to measure voltage, resistance, current or other necessary parameters (if you do not know what "current", "voltage" and something else - do not be discouraged! All unfamiliar words are what is inside the car " runs, "spins" or "measures." Success with the client lies in a thorough knowledge of the concept of "about."
Well, a dozen or two dozen more like that and simple terms
Remember that "Car diagnostics are very easy!"
