What the indicator "TRC On" on the dashboard reports, as well as what to do if the "TRC Off" lights up will be discussed in this article.
What is TRC?
TRC is a traction control system, which regulates the transmission of torque between the wheels on the drive axle of the car. The TRC abbreviation stands for "Traction Control", translated from English as "Traction Control".
The traction control system first appeared in 1971 in America on such famous cars as Cadillac and Buick. It began to be used on German Mercedes cars of the executive class in 1987. After the noughties, manufacturers began to include TRC in cars en masse.
Speed sensors track the speed of the wheels, and the system uses measures to reduce traction. The first modifications of cars reduced traction by jamming the engine rpm. Modern vehicles reduce speed through a special viscocoupler.
If the lamp "TRC On" or "TRAC On" is lit, it means that the system for controlling wheel slippage and skid damping is on. In Toyota, this system monitors and mitigates skidding and slippage. Although it was originally designed only as a traction control system.
The TRC system works as follows:
Thus the traction control protects the driver and the vehicle from creating accidents on the roads.
Warning.
Toyota Avensus , Auris, Rav 4, Lexus cars have a button called "TRC Off" on the dashboard. It allows you to disable traction control.
How to use the traction control system
Traction control is triggered when slipping lightly and even where you have to drive a difficult section of sandy road off-road. To drive on country roads, the manufacturers put a button on the dashboard, which disables the traction control.
By pushing it, the car owner will be able to drive the car on difficult sections of the road, where intensive acceleration of the car is needed, rather than blocking the wheels. But drivers should know that after pressing the button after some time, it is automatically deactivated, and again the slip control system comes into action. Therefore, it will have to be pressed several times if the car crosses long difficult areas.
But there are times when the VSC and TRC lights come on together on the dashboard monitor. It signals about an error in driver's safety control system.
Using traction control in real operation
Despite the fact that many modern cars have the traction control option, not all drivers know how to use this system. Let's try to understand how to use traction control system by the example of Toyota RAV4.
In normal mode of driving, so to say "by default", TRC system of Toyota is permanently activated. Its intervention in management at first sight is absolutely imperceptible, however at hit of one or several wheels of the car on a slippery site of road the system comes into action, "directing" the car in the necessary direction and preventing development of drift.
In practice, this can be noticed by the selective triggering of the anti-lock braking system, which is accompanied by a characteristic crunch, as well as reduced response to the pedal "gas". In addition, the corresponding indicator on the dashboard flashes, signaling the triggering of the system.
VSC and TRC off errors
VSC stands for Vehicle Stability Control. VSC works in tandem with TRC. If TRC Off and VSC light up on your Toyota Avensis, it means there are sensor failures on the drive wheels, or there are problems with the engine or wiring.
It is necessary to diagnose sensor information through the software in the service station with an OBD2 scanner.
Attention! Experts do not recommend resetting VSC and TRC OFF errors of Toyota Avensis or Auris by removing the terminal from the battery unit. If the problem was not a glitch in the computer firmware, it will repeat itself, and an easy malfunction will turn into an overhaul of the entire car.
On Toyota Avensis, the TRC Off and VSC lights are usually daisy-chained. A third Check Engine light is added to them . These are common errors that are discussed by Prado, Toyota Progress NC 300 owners on specialized forums.
The problem appears at different times of the year. Intense appearance of the error is due to the cold winter season, to which cars are not accustomed and the computer may fail. But often TRC Off in Toyota lights up when the fault is in the car itself.
When the VSC lights in conjunction with TRC in Toyota Avensis problems can be:
Warning Experts confirm that on Toyota Avenis and Auris, the VSC and traction control light illuminating is a common glitch. We recommend checking the connectors, wiggling them, disconnecting them and plugging them back in.
Tips for fixing the error
What a car owner should do if TRC OFF is on:
If a car owner is going to buy a sensor, it is necessary to choose the original one. Non-original quickly fails, and the error reappears on the dashboard monitor.
If the car engine is tripping, and the errors appear the same, the experts recommend changing the coil on the plugs, clean the injectors. It is desirable to fill up with quality gasoline. Especially if the car was produced in the beginning of zero.
In Land Cruisers, Toyotas Rav 4, these errors occur because of an old oxygenator. Experienced mechanics advise replacing it.
In some cases, mechanics at the service station can re-flash the program in the electronic control unit.
When checking with a scanner, the following codes appear:
If with the rest of the faults the car owner can stall indefinitely, the problem with the engine should be solved immediately. Further procrastination will cause a complete shutdown of the vehicle and an overhaul or replacement with a new motor.
Conclusion
The traction control is an assistant to the car owner on the roads. Therefore, any illumination of the lamp should be diagnosed and the error detected and corrected as soon as possible.
Failure of the car stability control system on the roads will lead to the creation of an emergency situation. And you also need to remember that driving truly correctly and without accidents can only be made by the driver himself.
