The wheel speed sensor is an essential component of the braking system in any vehicle, including the Toyota Highlander. It measures the rotational speed of each wheel and sends this information to the vehicle’s control module, which calculates the vehicle’s speed and stability.
A malfunctioning wheel speed sensor can cause issues with the ABS and traction control systems, making it essential to know when it is not functioning properly.
The most common signs of a bad wheel speed sensor are decreased fuel efficiency, a jerking sensation when accelerating, or the ABS light being illuminated.
In this guide, we will discuss how to tell if your Toyota Highlander wheel speed sensor is bad and fix solutions.
What is Wheel Speed Sensor, and How Does it Work in the Toyota Highlander?
The wheel speed sensor in the Toyota Highlander is a component that measures the rotational speed of the wheels and sends that information to the vehicle’s anti-lock braking system (ABS).
It works by using a magnetic field to detect the movement of a toothed ring or reluctor ring mounted on the wheel hub. As the wheel turns, the teeth on the ring pass by the sensor, which sends a signal to the ABS control module.
The module uses this information to determine if one or more wheels rotate at a different speed than the others. It can selectively apply the brakes to help prevent wheel lock-up and skidding during hard braking or slippery road conditions.
How to Tell If Your Toyota Highlander Wheel Speed Sensor is Bad?
The wheel speed sensor is an essential component of the anti-lock braking system (ABS) in your Toyota Highlander. If the sensor fails, it can cause various issues with your brakes and other safety features. Here are some signs that your vehicle’s wheel speed sensor may be bad:
ABS Warning Light
One of the most obvious signs that your wheel speed sensor is bad is the illumination of the ABS warning light on your dashboard. When the sensor fails, it sends incorrect or no signals to the ABS control module, causing the warning light to come on.
Brakes Locking Up
Another sign of a faulty wheel speed sensor is brakes locking up or failing to work as expected. A damaged sensor can send false signals to the ABS control module, which may cause it to malfunction and fail to engage the brakes correctly. This can cause the brakes to lock up, resulting in loss of control of the vehicle.
Unusual Noises
A damaged wheel speed sensor can also cause unusual driving noises. This can include grinding, squeaking, or other abnormal sounds that are not typical of your vehicle. The noise may be more pronounced when turning and can be caused by the sensor not correctly detecting the wheel’s speed.
Inconsistent Speedometer Readings
Another sign of a failing wheel speed sensor is an inconsistent speedometer reading. The sensor is responsible for providing speed data to the vehicle’s computer, which displays the speed on the speedometer. If the sensor is not working correctly, it can cause the speedometer to show erratic readings or not work at all.
Traction Control Issues
The wheel speed sensor is also an important component of the vehicle’s traction control system. If the sensor is not working correctly, it can cause the traction control system to malfunction and fail to work as intended. This can cause the vehicle to slip or slide on slippery surfaces, increasing the risk of an accident.
How to Fix a Bad Toyota Highlander Wheel Speed Sensor?
If you suspect that your Toyota Highlander’s wheel speed sensor is bad, you should inspect the problem as soon as possible. Here are some potential ways to fix a bad wheel speed sensor.
Step 1: Replace the Sensor
If the sensor is damaged or broken, it will need to be replaced with a new one. The technician will remove the old sensor and install a new one. This is a relatively simple repair, and the new sensor should restore proper function to the ABS.
Step 2: Repair the Wiring
In some cases, the issue may not be with the sensor itself, but with the wiring that connects it to the ABS control module. If the wiring is damaged or corroded, it can cause the sensor to send inaccurate signals or no signals at all. The technician can repair or replace the damaged wiring, which should restore proper function to the sensor.
Step 3: Clean the Sensor
Sometimes, the issue with the sensor may be caused by dirt or debris that has accumulated on it. The technician can clean the sensor using a special cleaning solution to remove any buildup that may be interfering with its function.
Step 4: Replace the ABS Control Module
If the issue is not with the sensor itself but with the system’s ABS control module or other components, more extensive repairs may be necessary. In some cases, the ABS control module may need to be replaced with a new one. This more complicated repair involves removing and replacing the entire module.
Step 5: Perform System Diagnostics
To ensure that the ABS is functioning correctly, the technician may perform system diagnostics to identify any other issues that may be affecting the system. This can include checking the brake fluid levels, inspecting the brake pads and rotors, and testing the other sensors and components of the system.
Prevention Tips to Avoid a Bad Toyota Highlander Wheel Speed Sensor
Here are some prevention tips to help avoid a bad wheel speed sensor in your Toyota Highlander:
- Regularly inspect your vehicle’s brakes, tires, and other components that can affect the wheel speed sensor. Check for signs of wear or damage, such as worn brake pads, damaged tires, or corroded wiring.
- Drive carefully and avoid aggressive driving. Rapid acceleration, hard braking, and sudden turns can put extra strain on your vehicle’s ABS and its sensors, including the wheel speed sensor.
- Be mindful of road conditions and weather. Wet, slippery roads or uneven pavement can cause your vehicle’s wheels to slip or slide, which can affect the accuracy of the wheel speed sensor’s readings.
- Maintain proper tire pressure and alignment. Misaligned wheels or underinflated tires can cause your vehicle’s wheels to spin at different speeds, which can trigger the ABS and potentially damage the wheel speed sensor.
- Avoid driving over curbs or hitting large potholes, as this can cause damage to your vehicle’s suspension and potentially affect the wheel speed sensor.
Final Thoughts
Toyota Highlander wheel speed sensor is an important component of any Toyota Highlander. Knowing how to tell if your Toyota Highlander wheel speed sensor is bad and fix solutions can save you time and money.
So, if you experience any of the symptoms described above, you should check the wheel speed sensor and clean or replace it as needed. However, if you are unsure of how to do this, consult a qualified mechanic.
Taking care of your Toyota Highlander wheel speed sensor can help you avoid any future complications and keep your vehicle running in top condition.
