KDSS on Toyota Land Cruiser 200 and Toyota Land Cruiser Prado 150 SUVs

Possible causes of error 4lo

The “4lo” symbol on the Toyota Land Cruiser 200 dashboard lights up along with one of the following symbols:

• check usc system;
• check engine;
• traction control disable icon;
• ABS.

In the middle of the display, a yellow triangle with an exclamation mark also lights up, which symbolizes the presence of some error in the operation of the car.

Often the main cause of the 4lo error is low-quality fuel. First of all, this problem manifests itself at low ambient temperatures. As a result, the car produces reduced power, has difficulty picking up speed, and there is not enough traction to go faster than 30 km/h.

However, this is one of the easiest reasons that causes a situation where 4lo is flashing in the Land Cruiser 200. It will be enough to fill in high-quality fuel, which will clean the system. The light bulb can also come on for the following reasons:

• transmission malfunction;
• failure in the operating mode of the center differential lock controller;
• violation of the integrity of electrical wiring;
• fuel filter malfunction;
• mechanical damage to components;
• sensor malfunction.

This is not a complete list of the appearance of the symbol in question on the dashboard. It is very difficult to determine the exact cause of the problem while sitting in the car. Visually, such an error is also not striking. Therefore, it is possible to understand what happened only during computer diagnostics using suitable software.

“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.

What is TRC

Many car owners notice that the “TRC On” light comes on on various Toyota modifications. But not everyone knows what it is.

TRC translated from English means “Traction Control”. Speed ​​sensors monitor wheel speed and the system uses measures to reduce traction. The first modifications of cars reduced traction by reducing engine speed. Modern vehicles reduce speed using a special viscous coupling.

If the “TRC On” lamp is on, this means that the wheel slip and skid control system is turned on. In Toyota, this system monitors and mitigates skidding and slipping. Although it was originally created only as anti-skid.

The TRC system works as follows:

1. Sensors monitor wheel speed. The signals are sent to the ECU (electronic control unit) .
2. If the device detects an increase in speed, it transmits a signal to the actuators.
3. Special automatic TRC valves block the movement of wheels that begin to slip.

Thus, traction control protects the driver and the car from creating emergency situations on the roads.

Attention! On cars of the Toyota Avensis, Auris and many other brands, there is a button on the dashboard called “ TRC Off ”. It allows you to disable traction control.

How to use the traction control system

Traction control works when sliding slightly and even where you need to drive a difficult section of sandy road off-road. To drive on country roads, manufacturers have placed a button on the dashboard that turns off the traction control.

By clicking on it, the car owner will be able to drive the car along difficult sections of the road where intensive acceleration of the car is needed, and not blocking the wheels. But drivers should be aware that after pressing the button for a while, it automatically turns off and the traction control system comes into action again. Therefore, it will have to be pressed several times if the car crosses long, difficult sections.

But it happens that the VSC and TRC lamp turn on together on the dashboard monitor. This indicates an error in the driver safety monitoring system.

VSC and TRC off errors

If TRC Off and VSC light up together on a Toyota Avensis, this means that there is a problem with either the wheels or the engine or the wiring has broken.

It is necessary to diagnose the sensor information through computer software. If the car owner is an experienced mechanic, then he can do this at home. If the driver does not have experience working with diagnostic equipment or a scanner, then it is recommended to go to a service station.

Attention! Experts and experienced car owners do not recommend clearing VSC and TRC OFF on Toyota Avensis or Auris by removing the terminal from the battery pack. If the problem was not a computer firmware glitch, it will happen again. and a minor malfunction will turn into a major overhaul of the entire machine.

On Toyota Avensis, the TRC Off and VSC lights usually light up as garlands. Check Engine light is added to these These are common mistakes that are discussed by owners of Prado cars, Toyota Progress NC 300, on specialized forums.

The problem appears at different times of the year. The intensive occurrence of the error is due to the cold weather during the winter season, to which cars are not accustomed and the computer may malfunction. But often Toyota's TRC Off lights up when the fault is in the car itself.

When VSC lights up together with TRC in a Toyota Avensis, problems can be:

• with the engine, if the “Check Engine” light also comes on. Failure of the engine results in the following types of malfunctions that a driver without a scanner will notice: increased fuel consumption, decreased power when driving on flat terrain, difficulty shifting gears, sudden stops or jerking of the car;
• damage to the wires going to the ABS sensors;
• low tire pressure;
• poor contact on the stops;
• if the steering wheel has recently been replaced and calibration has not been performed.

Attention! Experts confirm that on Toyota Avenis and Auris, the lighting of the VSC and traction control lamps is a common glitch. It is recommended to check the connectors, wiggle them, disconnect them and insert them back.

Tips for fixing the error

What should a car owner do if the TRC OFF light is on:

• if the scanner shows error P0037, inspect the places where the first or second lambda and the wires behind it are twisted and connected. Perhaps they frayed. Any rust or moisture can cause an error to appear indicating that there are problems with the traction control;
• check tire pressure. A pressure difference of 0.3 mPa can cause the traction control and VSC lights to appear on the monitor. Approximate tire pressure is 2.4 atmospheres.

If the car owner is going to buy a sensor, then he must choose an original one. The non-original quickly fails, and the error appears again on the dashboard monitor.

If the car engine is running rough and the same errors appear, then experts recommend changing the coil on the spark plugs and cleaning the injectors. It is advisable to refuel with high-quality gasoline. Especially if the car was released at the beginning of the 2000s.

On Land Cruisers, Toyota Rav 4, these errors appear due to the old oxygen system. Experienced mechanics advise replacing it.

In some cases, mechanics at a service station can reflash the program in the electronic control unit.

When checking with a scanner, the following codes appear:

• C1241 – low voltage in the network. Experts recommend charging or replacing the battery;
• P1667 – VSV valve malfunction. It must be replaced and the error removed using a scanner;
• C1201 – malfunction in the ECM system. This is the engine control unit. If the error lights up along with VSC and Check Engine, then the engine control unit should be replaced. It includes: printed circuit board, processor, flash memory. It is recommended that repairs be made only by professionals who specialize in repairing engines of various Toyota modifications.

If the car owner can delay indefinitely with other faults, then the problem with the engine must be solved immediately. Further delay will result in a complete shutdown of the vehicle and major repairs or replacement with a new engine.

Land Cruiser 200

Good evening everyone. Help, the 4LO light came on and blinks constantly, when driving, when parking. I went to the officials, but unfortunately they didn’t say anything concrete. Maybe someone has encountered this already?????

• On my Toyota Land Cruiser 200, this error came on, and in addition to it, the anti-slip check light came on, and 4lo was flashing, the problem was that the throttle valve was dirty and did not close completely, after cleaning everything was fine!
  Ps Tested and done by trusted people!

  .

  vox audita latet, littera scripta manet

• thanks, I'll try it tomorrow. I'll write back right away.

• Why then are there such officials?

• Author, what the FUCK are you doing, with such jerking off, in the DROM?! There are only Oligarchs in Jaguars and Bentleys!

  Accounting services, opening of LLC, IP, management. 8 961 871 99 91

• If the officials didn’t help you, do you think the local dromoolegarhs will help you?)

• Irkutsk is the capital of the world *****.

• Try to put it in neutral, turn on low - the indication should be on constantly, walk 200 meters in low, then back to neutral and turn off low. The indicator should flash and go out. A flashing indication indicates the intermediate position of the transfer case. If you rarely use it, the drive usually goes sour, a standard defect. If it doesn’t help, then most likely it’s the wires, the RK position sensor or the router, then you need a computer and a Toyota program, you can check all this from the computer. The officials are really kind of strange, they have a standard troubleshooting, they could read it...

  Long live that which makes us, no matter what!

• Enough eyes and hands. The sensor was torn off by the snow, guess what... How did people live without scanners before??

• and how did you live without a Kruzakof before?..) without a 200x, in the sense)

  I spent the best years of my life in debauchery and drunkenness. In fact, that's why they are the best. Henry IX

• Message from
  Forik-KiroF

  and how did you live without a Kruzakof before?..) without a 200x, in the sense)

  Read also:  How to change the oil in a Toyota Land Cruiser 200 engine

  How then can you live without a Mercedes Eclass? I can't imagine :-)