Toyota Pre Collision System Malfunction Reset – A Complete Guide

Like the majority of drivers, you undoubtedly rely on the pre-collision system in your vehicle to lessen the effects of an accident.

If you encounter a pre collision system error, performing the Toyota pre collision system malfunction reset can solve the problem.

Don’t know how to do it? You can find all the steps to complete this task in this guide.

We will also walk you through all the information about the reasons behind this problem and how to prevent them. Let’s get started! 

What Is A Pre Collision System?

The pre collision system (PCS) is a safety feature that utilizes sensors to identify impending collisions and immediately apply the brakes to lessen the impact.

Certain pre collision systems may also have functions like lane departure warning, adaptive cruise control, and automatic braking to assist drivers in preventing accidents.

This way, drivers can prevent frontal collisions or lessen their severity.

This safety feature now offers better nighttime and low-light pedestrian detection capabilities, as well as daytime pedestrian and bicycle detection.

It can spot susceptible people and put on the brakes as needed by observing their shape, size, and movements.

How Does Pre Collision System Work?

The pre collision sensor employs radar to determine whether a collision is about to occur when the automobile is in drive and approaches another vehicle or object.

When a collision is anticipated, the sensor will turn on the pre collision system, aiding in lessening the impact or possibly preventing it altogether.

An invisible laser and a front-facing camera are standard equipment on a new Toyota vehicle with the pre collision system.

These elements are used to calculate the distance between the car and any obstacles that are directly in front of you.

Your speed is taken into account by the system when determining the likelihood of a collision.

Your Toyota will inform you via auditory and/or visual means whether it determines that a collision is possible. In this case, the brake should be manually applied as soon as you can.

Suppose you don’t slow down or stop driving after receiving the alerts; the pre collision system will slam on the brakes.

Driving cautiously and attentively is essential. Still, you will have more security against the inescapable roadside surprises thanks to the Toyota pre collision system.

What Does Pre Collision System Malfunction Mean On Toyota?

Pre collision system malfunction Toyota means this system does not function properly and wrongly identifies a potential collision when none is there, causing the driver to become startled and lose control.

Furthermore, a defective PCS could result in a more severe or catastrophic accident if it fails to put on the brakes when a crash is about to happen.

It is crucial to routinely service and test the functionality of your PCS in order to assist prevent these potential risks.

Aside from that, always be aware of your surroundings when driving and be ready to react in case the PCS breaks down.

Why Toyota Pre Collision System Fails And How To Fix It?

Malfunctions in the pre collision system could have several possible causes.

Debris build-up on camera, sensors, speed sensor, windshield, malfunction airbag sensor, or wrongly placed two hitch are a few to name.

Camera With Debris Build-Up

Debris build-up on your camera is among the frequent causes of pre-collision system failure.

Once the front camera’s vision is obscured, your Toyota pre collision system won’t be able to function effectively.

If this happens to your car, don’t be too worried. Cleaning your camera will easily resolve this issue.

Dirt On The Sensors

Radar sensor contamination is another frequent cause of pre-collision system issues. Dirt, ice, snow, or even bugs can obscure the radar sensor, which is situated behind the front grille of the car.

In order for the radar sensor to efficiently identify roadside obstructions, it must not become blocked.

Thus, it pays to periodically clean your radar sensor if you drive regularly or live in a region where bugs are prevalent to avoid this issue.

Defective Airbag Sensor

A bad airbag sensor, which is located in the front of your automobile, is one probable root cause of pre collision system issues.

When you notice there’s something wrong with this sensor, you may try to reset it by removing your power cord to fix the problem.

Simply unbolt the battery’s positive cable, and keep it out for at least two to three minutes.

Still, this method won’t work once the sensor is broken and prevents your pre-collision sensors from operating properly. In this case, swap out the malfunctioning airbag sensor to tackle the problem.

FCW Error

Even though no one brakes abruptly in front of you, you may occasionally notice your Toyota’s FCW (forward collision warning) light is on.

When someone unexpectedly stops in front of you, the car automatically applies the brakes for you when the forward collision warning light comes on.

In this situation, the pre-collision system malfunction problem will also arise.

When you encounter the forward collision warning error notice, the first thing to do is shut off the engine. Wait a couple of minutes after the engine has been switched off before starting it again.

The system will typically be reset, the error message will be removed, and both FCW and PCS malfunction will be fixed.

Suppose this method doesn’t work and the problem is still there; bring your Toyota vehicle to the service facility to have it fixed.

Dirty Speed Sensor

Let’s say you discover that the pre-collision system on your Toyota automobile is not functioning, but the car itself still operates normally; this indicates that your car’s front speed sensor might be covered with debris and dirt.

The way of getting the pre collision system malfunction Toyota fix is quite simple.

You just need to clean the front speed sensor thoroughly with a mixture of water and car-washing soap in a 1:1 ratio.

Then, wipe it off once again with a fresh, dry cloth. Do this regularly to keep the sensor clean and lower the possibility of PCS malfunction.

Dirty Or Tinted Windshield

You may notice the engine light or a warning message for pre collision system malfunction.

A dirty or tinted windshield can be the reason behind these issues as it may make it difficult for the radar sensor to identify impediments.

The solution is fairly simple. Whenever your windshield is dirty, cleaning it will do. Also, avoid tinting the windscreen too dark so the radar sensor can function properly.

Improperly Placed Tow Hitch

A tow hitch is a towing accessory attached to a car’s chassis or an aircraft’s nose gear by a tow bar. If your vehicle has a tow hitch installed, it is crucial to ensure it is set up properly.

The tow hitch may impede the radar sensor and render the pre collision system inoperable when it is not placed correctly.

Thus, asking a skilled automotive technician to install a tow hitch for you is the way to go. They will guarantee to do it correctly and ensure the tow hitch doesn’t block the radar sensor.

How To Spot Toyota Pre Collision System Malfunction

There are several factors to check to find out whether the pre collision system is running improperly. One obvious pointer is when you notice the forward collision warning.

Once this problem occurs, it would be best to immediately take your vehicle to the dealership to get it fixed.

Additionally, a check-up is also required if you see any signal lights have gone red.

These red lights indicate a problem, so you should pull over and address it right away before it gravely hurts someone or causes more damage to your vehicle.

Toyota Pre Collision System Malfunction Reset Process

The PCS reset procedure is simpler than you think. This section will explain when and how to fix your 2018 Toyota Corolla pre collision system malfunction by resetting it.

When To Reset Pre Collision System

When driving your Toyota, you might observe the following issues.

• The system is malfunctioning.
• The sensors of the system can no longer detect the vehicle in front of you.
• The laser or light sensor in the PCS has a functioning issue.
• The pre collision system has been disabled automatically.
• There are errors or marks on your screen that implies the system does not work properly.

It is important to perform the Toyota Corolla pre collision system malfunction reset process if any of the above four circumstances hold true.

Keep in mind this also applies to most Toyota car models available on the market.

How To Reset Toyota Pre Collision System

If you’re experiencing a pre-collision system malfunction warning on your Toyota, follow these steps to resolve the issue:

Tools Needed for Resetting the Pre-Collision System

Before you begin, gather the following tools:

• Pry tool or flathead screwdriver
• Phillips head screwdriver
• 10mm wrench

Step 1: Diagnose the Issue

Use a scan tool to identify the error code causing the malfunction. The common error code for this issue is U0137, indicating a communication problem with the trailer brake control module.

Step 2: Check for Necessary Components

Ensure your vehicle has all the necessary components, including the trailer brake control module and controls. These components are sometimes optional and may not be installed in all vehicles.

Step 3: Install the Trailer Brake Control Module

Untape the trailer brake control from its position and plug it into the designated socket. It is crucial for the proper functioning of the pre-collision system.

Step 4: Access the Glove Compartment Area

Start by carefully removing the panels around the glove compartment using a pry tool or flathead screwdriver.

Insert the tool between the panels and gently pry them off, being cautious to avoid damaging the clips or panels. Complete this step to get clear access to the installation area.

Next, use a Phillips head screwdriver and a 10mm wrench to remove all screws and 10mm nuts securing the glove compartment.

Identify the fasteners around the edges and inside the glove compartment, then unscrew them and keep them in a safe place. Once all screws and nuts are removed, gently pull out the glove compartment to fully access the installation area.

Step 5: Install the Control Module

To mount the control module, position it securely behind the glove compartment. We recommend using 10mm nuts to fasten the module; if a bracket is available, utilize it for additional stability, but zip ties can also be used if necessary.

Once the module is secured, connect it to the appropriate wiring harness to integrate it properly with the vehicle’s system.

Step 6: Reset the Vehicle System

To reset the system, start by disconnecting the battery’s negative terminal. This helps clear any existing errors.

Requires you to press the horn and brake pedal to discharge any residual power remaining in the system.

After ensuring all power is drained, reconnect the negative terminal of the battery to restore power to the vehicle.

Step 7: Verify the Fix

Insert the key and start the vehicle to begin verifying the fix. Once the engine is running, check the dashboard for warning lights, specifically ensuring that the warning light for the pre-collision system is no longer displayed.

This means the reset was successful, and the system functions correctly.

Step 8: Test Drive

Take the vehicle for a short drive to confirm the issue is fully resolved and that the pre-collision system is functioning correctly.

How To Prevent Toyota Pre Collision System Malfunction

You already know the pre-collision system malfunction how to fix solutions; now, let’s discover how to prevent this issue from happening.

Keeping the sensor clean is the best approach to avoid Toyota’s pre-collision system breakdown. The sensor is positioned behind the car’s bumper.

If it gets dirty, the system may not work properly. Additionally, ensure that there are no obstructions, such as leaves or snow, near the sensor.

The sensor may not accurately detect a roadside object if it is blocked.

Regular system maintenance is another technique to stop a pre collision system malfunction, which includes examining the sensor and the program that controls the system.

This way, you can keep the system in good condition and spot any problems as soon as they arise.

Bonus: Suppose you face some Toyota softex problems and don’t know how to fix them; we can also help you out. Check out our site for further information!

Frequently Asked Questions

How Can I Turn On Pre Collision System?

If you want to turn on your Toyota pre collision system, here are the steps to follow:

• Step 1: Turn your key to the On position.
• Step 2: An information display with multiple screens should be in the center of the instrument panel.
• Step 3: Go down and locate the “gears” symbol utilizing the steering-wheel arrows. Notice a symbol resembling a car colliding with another car’s rear.
• Step 4: Select the center button surrounded by the arrow symbol. This will switch the pre collision system on/off. Holding down this button will allow you to change any pre-collision system setting. And you are done!

How to Turn Off the Pre-Collision System in a Toyota ? Step-by-Step Guide.

For those who need to turn off the pre-collision system, including the pedestrian detection system, on their Toyota, it’s best to follow these simple steps.

No special tools are required for this process.

Step 1: Ensure the Vehicle is Stopped

Before attempting to disable the pre-collision system, it is necessary to stop your vehicle. You cannot do this while the vehicle is in motion, so ensure the car is stationary.

Step 2: Locate the Traction Control Button

Find the traction control button on your dashboard. It is typically marked with a car icon with squiggly lines behind it. This button controls the traction control system.

Step 3: Turn Off the Traction Control

Press the traction control button once to turn off the traction control system. If you need to turn it back on, you can press the button again.

This is a preliminary step before turning off the pre-collision system.

Step 4: Disable the Pre-Collision System

To turn off the pre-collision system, press and hold the traction control button for 3 seconds.

A message on the dashboard indicates that the pre-collision system, VSC (Vehicle Stability Control), and pre-collision brake system are unavailable.

This confirms that the system has been temporarily disabled.

Step 5: Confirm the System is Off

Check the dashboard for confirmation messages indicating that the pre-collision system has been turned off. Ensures that the system is no longer active.

Step 6: Restart the Vehicle

Be aware that this action does not permanently disable the pre-collision system. The system is on by default, and it will automatically reactivate the next time you start your vehicle.

Important Notes

• This is a quick and temporary way to turn off the pre-collision system. It is also useful in situations where you need to turn it off temporarily.
• Remember that your vehicle is stopped before attempting to disable the pre-collision system.
• You may still need to navigate to the vehicle’s settings menu for permanent changes or more detailed adjustments.

Suppose you are still confused; you can check out this tutorial video on how to disable the PCS of Toyota cars for better visualization.

Still, we advise you to keep the PCS on since it can minimize the damage the accident causes.

At What Speed Is Pre-Collision Assist Active?

The Toyota pre collision system gets involved once there is a differential of 38 mph.

This device will warn the driver to apply the brakes and provide braking power once the car’s brakes are applied. With this approach in place, the crashes are more likely to be milder.

Can I Drive Without Pre Collision System?

Keep in mind that the driveability of your Toyota will not be impacted by problems with the pre collision system, unlike the check engine light. This feature will only kick in when you aren’t fully alert.

Nevertheless, PCS issues may potentially impact cruise control functions and other specialized features.

Therefore, keep these restrictions in mind if you are operating a vehicle with a failing pre collision system.

This does not necessitate an immediate trip to your local Toyota dealer, but you should get the PCS feature rectified as soon as you can.

Conclusion

This post has explained how you can perform the Toyota pre collision system malfunction reset procedure.

We have also provided you with all the basic information about this safety feature, from how it works to how to spot the PCS malfunction.

Although there are many potential issues with a pre collision system, most of them can be solved by cleaning the car and sensor features frequently.

Should our solutions not make your problem go away, we suggest you bring your car to a retail shop and let the professionals handle it.

Driving with a malfunction can be quite dangerous not just for you but for others as well.

Thus, it is vital to check regularly to ensure your PCS is functioning properly and detect any problems as soon as they arise.