Sistema ABS piezas para Toyota 4Runner

ABS System Parts for Toyota 4Runner

Anti-lock braking systems are the most important safety system designed to prevent your Toyota 4Runner from skidding during wet road conditions. Anti-lock braking systems allow your vehicle to maintain traction on the road without causing the tires of your Toyota to lock up. These systems have been in use since 1971 and are common with all Toyota vehicles.

How do anti-lock braking systems on a Toyota 4Runner work?

Anti-lock braking systems were designed for cars in response to the tendency for drivers to brake suddenly in slippery conditions. This sudden braking would lead to tires locking up and sending a vehicle into a skid. Anti-lock braking systems limit skidding by automatically implementing cadence braking, which is a series of activating and deactivating the brakes. This action allows for braking without skidding but can increase the time it takes your Toyota 4Runner to stop when driving on gravel or snow.

What types of anti-lock braking systems are there?

There are two major types of anti-lock braking systems available for your Toyota: three-channel systems and four-channel systems. Three-channel systems regulate the braking of the two front tires separately but combine the two rear tires into one channel of the car. While three-channel systems have sensors to detect skidding on all four wheels, it only has the capacity to engage anti-lock braking for two wheels at the same time. Four-channel systems are generally preferred as they regulate each tire individually. This provides for greater control over the entire vehicle and leads to less skidding.

What are the components of an anti-lock braking system?

These are the Toyota 4Runner parts for your ABS system:

  • Speed sensors: Speed sensors, also known as wheel speed sensors, help regulate the braking based on the speed your 4Runner tires are rotating. These parts signal the speed of your tire rotation to the controller that automatically regulates braking. Anti-lock braking systems are speed-sensitive in that they will not activate at very low rates of speed.
  • Valves: Every individual brake controlled by an anti-lock braking system has a valve. The valve applies different levels of pressure in order to slow the vehicle without skidding.
  • Pump: Each valve also has a pump that activates when a valve deactivates. The pump allows for steady pressure on each line regardless of whether the valve is braking or not.
  • Electronic Control Unit: The "brain" of the anti-lock braking system is known as the Electronic Control Unit, commonly referred to as ECU. The signals sent from the sensors travel to the ECU which in turn instructs the other parts to activate or deactivate at the appropriate time. The ECU is ultimately responsible for making the parts of your vehicles anti-lock braking system work together.

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