How to reset abs errors on Toyota?

The anti-lock braking system (ABS) is designed to maintain vehicle control and stability when the brakes are applied suddenly. In most cases, it is an invaluable assistant to the driver, preventing the risk of getting into an accident. However, the benefits of ABS appear on smooth surfaces, but in snowfall, on an icy road surface or uneven surfaces, it can be harmful, increasing the braking distance. Therefore, some drivers seek to disable ABS completely or temporarily.

Have you ever needed the help of a car lawyer?

Not really

Typically, the manufacturer does not provide for disabling ABS, although this function is present on some models, especially sports ones. Therefore, drivers have to resort to tricks and disconnect the power circuit to turn off the system.

Braking distance with ABS

We accelerate to a speed of 50 km/h and press the clutch and brake pedals all the way to the floor. We hear the crackling sound of the ABS.

The car stopped perfectly smoothly and without any nuances.

We put marks where the front wheels stopped so that we can take measurements later.

Now we do the same thing, but with the ABS system disabled

How to disable ABS

The shutdown provided by the manufacturer will only require pressing a button on the car’s dashboard.

If such a function is not provided, you will need to de-energize the ABS.

What you need

The easiest way is to remove the ABS fuse.
To de-energize the anti-lock braking system, you need to gain access to the fuse box. In order to get rid of the ABS error light, you will need a five-pin relay, which can be purchased at any radio store or auto store.

Step by Step Actions

The sequence of actions when de-energizing the ABS system is as follows.

You need to open the fuse box located in the passenger compartment under the steering column or engine compartment next to the battery . You can find out exactly where the ABS fuse is located in your vehicle's owner's manual.
You need to disconnect the fuse terminals and remove it from the socket . After this, the anti-lock braking system will be de-energized.

The result of this operation is the activation of the ABS error light, and an audible error warning is also often provided.

To get rid of annoying signals, you will have to turn off the power and the warning light about incorrect operation of the system. To do this you will have to perform the following steps.

Unscrew the fuse mounting block and remove its bottom cover.
Find the wire leading to the removed fuse, cut it and strip the ends.
The wire leading to ground must be connected to pins 85 and 86 of the five-pin relay. The wire coming from the fuse is connected to pin 30. Pin 88 is connected to the ABS using a wire prepared in advance and crimped into a terminal.
Then the wires are installed in the relay block.

This scheme will save the car not only from the operation of the ABS itself, but also from the annoying warning light.

Possible problems and nuances

In some cases, disabling the anti-lock braking system actually shortens the car's braking distance. However, this does not mean that traffic safety is improved. The latest generations of ABS are also responsible for distributing braking forces along the axles during standard braking, replacing standard mechanical regulators in this matter.

Therefore, disabling modern ABS threatens to lock the wheels of the rear axle even during standard braking.

Replacing the ABS sensor

Touch sensors in accordance with the ABS scheme are installed on all wheels of the car.

Replacing a device located on any of the rear wheels on a Prado 120 if the check light and stabilization system come on:

The machine is placed on a flat surface and the parking brake is activated. Wheels that will not lift are placed under wheels.
Remove the negative terminal from the battery.
The rear seats are removed, the plastic trim on the threshold is removed along with the rubber door seal.
To get to the sensor connector, bend the clamps, pull back the plastic trim where the shock absorber is attached, and turn off the device.
Using a jack, the car is raised 5 cm from the ground.
Wooden safety supports are placed under the bottom, the nuts are unscrewed, and the wheel is removed.
Unscrew the mounting bolt holding the sensor. If difficulties arise, use WD-40 lubricant. Helping with gentle rocking, the part is removed.
Release the brackets on which the wires are attached. 2 of them are located on the arch, one on the shock absorber.
Very carefully bend the anti-vibration pad under which the sensor wire passes, pull it out, removing the plug in the passenger compartment.
The new device is being installed; some force is applied for this. When it is in place, tighten the bolt.
Tighten the bolts of the wiring brackets.
The wire is pushed into the interior and a plug is installed.
The wiring is laid in such a way that the connector reaches the socket without tension. An overlay is glued, the surface of which is carefully smoothed.
The wheel is put in place.
The functionality of the new sensor is checked: a tester is connected to its connectors and actions are performed that correspond to the device diagnostic algorithm.
Connect the socket and connector.
Install the threshold trim, door seal and side trim. Put the seats in place.

It is recommended to turn on the ignition and start the engine before installing the trim elements. If the ABS lamp goes out after 3 seconds, operation continues.

FAQ

You can often hear the question “ How to disable ABS without removing the fuse, if such a function is not provided by the manufacturer?” " The only way to disable the system on the vast majority of cars is to disconnect the system's power supply circuit, which requires removing the fuse. There are no other shutdown options if there is no shutdown button in the cabin.

Another common question: “ Should ABS be turned off for the entire winter season? " If the reason for de-energizing the system is only the desire to shorten the braking distance on a winter road, then this is not necessary. For reducing the braking distance you will have to “pay” with loss of controllability, which is much more dangerous.

ABS does not shorten braking distances

Separately, I would like to dwell on the statement of ABS system manufacturers that this system reduces braking distance. You can watch a video from Bosch using the link I gave above. They claim that the ABS system reduces braking distances anytime, anywhere. And they argue that the maximum braking effect is achieved when the wheel is on the verge of blocking.

It is clear to everyone that this is so.

But they are being disingenuous in their marketing and ABS doesn’t work quite like that! After all, when braking with ABS, the wheel rotates jerkily, and is not constantly on the verge of blocking! It slows down cyclically - it pressed down, let go... pressed down, let go... Therefore, in my opinion, this is complete marketing nonsense.

Troubleshooting

If a malfunction on the Prado occurs where it is impossible to find a service station with the appropriate equipment, then you need to take steps to eliminate the malfunction yourself. The algorithm of action is as follows:

Open the hood and disconnect the battery.
Determine the location where the ABS unit is installed. As a rule, it has one body with a hydraulic accumulator. This element is easy to recognize, since many brake pipes and a thick bundle of wires with connectors are connected to it. It is this element that is removed for inspection: they look for moisture and mechanical damage. Just in case, it is better to blow it out and dry it.
Check the integrity of the fuses. It is advisable to replace even those that only cause suspicion.
The car is raised using a jack or lift. In this position, it is more convenient to inspect the wires going to the sensors for damage. The latter arise due to the fact that the wires rub against the wheels, flying off the mounts.
The connectors on the sensors are checked for rust and moisture.
If everything has been tried, and the ABS anti-skid light is still on on the Prado 120, then all that remains is to contact a service station.

These recommendations are useful only to those who decide to deal with the problem themselves. In the service, the fault will be detected using a scanner.

Braking distance with and without ABS

Now all that's left to do is measure the braking distance with ABS and the braking distance without ABS.

Even with a naked eye, it became clear in which situation the braking distance was shorter. But numbers are important to us.

Armed with a measuring tool, let's get down to business.

The result is:

With ABS – 13.5 m
Without ABS – 7.5 m

How do you like the result?

The point is not even that the braking distance is longer with ABS, but that it is almost twice as long!

How so?

In fact, there is nothing strange or unusual here. ABS is not designed to shorten braking distances!

I have previously written about the choice between a car with and without ABS. If you haven't read it, read it.

So there I quoted the words of the German racing driver Christian Danner, which read as follows: “It is a mistake to consider the braking distance of a car with ABS to be shorter than without ABS. The main merit of ABS is that during emergency braking the car remains controllable!”

The main purpose of ABS is to maintain vehicle control during braking.

Everyone knows that when the wheels are locked, the car not only completely disobeys the steering wheel, but also becomes susceptible to skidding. And if the wheels are in different conditions (the right wheels, say, on the grass, and the left ones on the asphalt), then skidding is guaranteed. And in order to reduce the risk of skidding and maintain control of the car, the driver has to competently control the brake pedal, which takes time and distracts the driver from assessing the road situation.

Our whole life, and even more so physics, consists of compromises. If we win at something, we will definitely lose at something. You can't go anywhere without this. Win-win options only exist in cartoons and science fiction films.

The ABS system is also a compromise. Maintaining controllability in exchange for a possible increase in braking distance.

Everyone decides for themselves what is more important to them – controllability or a shorter braking distance.

But smart guys long ago analyzed accident statistics and came to the conclusion that maintaining controllability is a priority. Therefore, the ABS system was protected at the legislative level. All new cars for the European Union are required to be equipped with an ABS system, in my opinion, back in 2004, and in Russia something similar was planned for 2021.

Reasons for the ABS light to come on

But it also happens that the ABS sensor light on the Prado 120 comes on for other reasons:

The sensors are clogged and the on-board computer suggests checking the diagnostic error code.
Rust on the sensors caused the anti-lock braking device to turn on incorrectly.
There is a malfunction in the on-board electrical network, under the influence of which the ABS TCS VSC exchange rate stabilization randomly came on on the Prado 120.
A bad wheel bearing causes the sensors to make errors, which causes the anti-lock braking system to engage.
The fuse responsible for ABS does not work correctly, as a result of which the signal passes directly.
A computer crash was followed by an incorrect command.

Sometimes the reason is hidden in a faulty generator or other elements of the on-board electrical circuit. In this case, the indication lights up even if a malfunction occurs in other components of the car, which means that the Prado 120 ABS sensor will not need to be replaced.