Awd System Check Engine On Highlander 2019

Explore the 2019 Highlander’s AWD system, learn to diagnose issues, resolve check engine warnings, and understand maintenance importance for optimal performance.When it comes to maintaining the performance and safety of your 2019 Highlander, understanding the All-Wheel Drive (AWD) system is crucial. This sophisticated system not only enhances your vehicle’s traction but also ensures a smooth driving experience. However, encountering a check engine warning can be concerning, especially if tied to the AWD system. In this article, we will delve into the intricacies of the AWD system in the 2019 Highlander, explore common reasons for the check engine light activation, and provide effective diagnostic tips. We will also discuss essential steps to take when this warning arises and highlight the importance of regular maintenance to keep your AWD system running efficiently. Whether you’re a seasoned driver or a new Highlander owner, this guide is designed to empower you with the knowledge needed to address AWD system issues confidently.

Table of Contents

Understanding The AWD System In The 2019 Highlander

The awd system in the 2019 Toyota Highlander is designed to enhance the vehicle’s traction and stability, especially in challenging driving conditions. This system automatically distributes power between the front and rear wheels, providing better handling on slippery surfaces like snow, ice, or mud. Unlike traditional four-wheel drive systems, which require the driver to engage the drivetrain manually, the Highlander’s awd system operates seamlessly without any input from the driver.

One of the key components of the awd system is the electronically controlled coupling located at the center of the vehicle. This coupling actively adjusts the torque distribution based on real-time driving conditions. For example, if the system detects that one set of wheels is losing traction, it responds by transferring more power to the wheels with greater grip. This capability results in improved acceleration and cornering performance, making the Highlander a versatile choice for a range of driving environments.

Furthermore, the 2019 Highlander incorporates advanced technologies such as traction control and stability control, which work in conjunction with the awd system. These features monitor wheel slip and vehicle dynamics to maintain optimal performance and safety. As a result, drivers can expect a smoother and more confident driving experience, whether they are commuting on highways or navigating through rough terrain.

Understanding how the awd system works in the Highlander is crucial, especially when the check engine light turns on. Recognizing the functioning of this system can help in diagnosing potential issues early on, allowing for timely inspections and repairs to ensure that it operates efficiently and reliably.

Common Causes For Check Engine Light With AWD System

When the check engine light illuminates in a 2019 Highlander equipped with an awd system, it can be concerning for any driver. Understanding the potential causes can help in troubleshooting and addressing the issue promptly. Here are some common causes:

Faulty Oxygen Sensors: These sensors monitor the exhaust and can trigger the check engine light if they are malfunctioning.
Loose or Damaged Gas Cap: A loose gas cap can allow fuel vapors to escape, which may activate the warning light.
Transmission Issues: Problems within the transmission can directly affect the performance of the awd system and cause the check engine light to illuminate.
Wheel Speed Sensor Failure: If the wheel speed sensors fail, the awd system may not engage properly, triggering alerts.
Transfer Case Problems: Any issues with the transfer case or its components can impact the awd system functionality, leading to warning indicators.
Electrical System Issues: Faulty wiring or connections within the awd system can also trigger the check engine light.
Low Transmission Fluid: Insufficient transmission fluid can compromise the awd system’s performance and lead to warning lights.

Identifying the specific cause of the check engine light is crucial, and it often requires professional diagnostic tools to accurately read the trouble codes associated with the awd system.

How To Diagnose AWD System Issues Effectively

Diagnosing problems with the awd system in your 2019 Highlander is crucial to ensuring its optimal performance. Here are some effective steps to help you identify the underlying issues:

Check the Dashboard Alerts: Begin by inspecting your vehicle’s dashboard for any warning lights specifically related to the awd system or the engine. The check engine light can indicate various issues, so it’s important to take note of any additional warnings.

Use an OBD-II Scanner: Connect an OBD-II scanner to your vehicle’s diagnostic port to retrieve error codes. This tool can provide valuable insights into potential faults in the awd system. Make sure to refer to the vehicle’s manual for specific code interpretations.

Inspect Fluid Levels: Check the levels of the differential fluid, transfer case fluid, and transmission fluid. Low fluid levels can lead to performance issues and trigger warning lights.

Examine Wiring and Connectors: Inspect the wiring and connectors associated with the awd system. Look for any signs of wear, corrosion, or loose connections that could affect system performance.

Perform a Visual Inspection: Inspect the mechanical components of the awd system, including the driveshafts, transfer case, and differentials. Look for any signs of leaks, damage, or irregular wear that may indicate a potential issue.

Conduct Road Tests: Take your Highlander on a controlled drive to see if any noises occur when accelerating or turning. Listen for unusual sounds such as grinding or clunking, which may suggest problems within the awd system.

Consult a Professional: If you’re unable to diagnose the issue independently, it’s wise to consult a qualified mechanic who specializes in AWD systems. They can provide a more in-depth analysis using advanced diagnostic equipment.

By following these steps, you can effectively diagnose issues related to the awd system in your 2019 Highlander and take appropriate actions to maintain your vehicle’s efficiency and safety.

Steps To Resolve AWD System Check Engine Warning

If you’re receiving a check engine warning related to the awd system in your 2019 Highlander, it’s essential to address it promptly to prevent further complications. Here are the steps you can follow to resolve the issue:

Scan for Error Codes: Use an OBD-II scanner to read the error codes. This will provide insight into the specific issues affecting your awd system.

Check Fluid Levels: Inspect the transfer case fluid and differential fluid levels. Low fluid levels can lead to a malfunction in the awd system.

Inspect Components: Look for visible signs of wear or damage in the awd system components, including driveshafts, differentials, and sensors.

Perform Electrical Diagnostics: Check the wiring and connections related to the awd system. Loose or corroded connections can trigger a check engine light.

Reset the Check Engine Light: After troubleshooting and fixing any identified issues, reset the check engine light using the OBD-II scanner to see if it stays off.

Test Drive: Conduct a test drive to confirm the awd system is functioning properly and that the check engine light remains off.

Consult a Professional: If the issue persists, it may be necessary to seek assistance from a certified mechanic who has experience with AWD systems.

By following these steps, you can effectively address the check engine warning in your Highlander’s awd system and ensure your vehicle runs smoothly.

Importance Of Regular AWD System Maintenance

Maintaining the awd system of your 2019 Highlander is crucial for ensuring optimum vehicle performance, safety, and longevity. Regular maintenance not only helps in identifying issues before they escalate but also contributes to the overall health of your vehicle.

Here are several reasons why regular maintenance of the awd system is essential:

Reason	Description
Safety	A properly maintained awd system enhances vehicle control, especially in adverse weather conditions, ensuring safe driving.
Performance	An efficient awd system improves handling and traction, contributing to better overall vehicle performance.
Preventive Measures	Routine checks can help detect problems early, preventing costly repairs down the line.
Resale Value	Vehicles with a well-maintained awd system generally attract a higher resale value.
Fuel Efficiency	Maintaining the system helps optimize fuel consumption, as a faulty awd system can lead to reduced efficiency.

In conclusion, regular maintenance of your Highlander’s awd system is not just about keeping warning lights off; it’s about ensuring your vehicle operates at its best while keeping you safe on the road. Schedule your maintenance checks regularly to keep your awd system in excellent condition.

Frequently Asked Questions

What does it mean if the AWD system check engine light is on in a 2019 Highlander?

The AWD system check engine light indicates that there is an issue within the all-wheel drive system, which could affect the vehicle’s performance, traction, and safety. It’s important to diagnose the underlying problem promptly.

What should I do if the AWD check engine light comes on?

If the AWD check engine light activates, it is advisable to pull over safely and check for any obvious issues. If nothing is apparent, consult your vehicle’s manual and consider taking it to a qualified technician for a diagnostic check.

Can I drive my 2019 Highlander with the AWD system check engine light on?

While it may be possible to drive with the AWD check engine light on, it is not recommended. Continuing to drive without diagnosing the issue can lead to further damage and potentially unsafe conditions.

What are common issues that can trigger the AWD check engine light?

Common issues that may trigger the AWD check engine light include low transmission fluid, faulty sensors, issues with the transfer case, or problems with the ABS system. A diagnostic test can help pinpoint the exact cause.

How can I diagnose the issue related to the AWD check engine light?

To diagnose the issue, you can use an OBD-II scanner to read the trouble codes stored in the vehicle’s computer. These codes can provide information on what is causing the AWD check engine light to illuminate.

Is it safe to ignore the AWD system check engine light in my Highlander?

Ignoring the AWD system check engine light is not safe, as it could indicate a serious problem. Addressing the issue as soon as possible is crucial to ensuring the vehicle’s reliability and safety.

How often should I have my AWD system checked?

It’s recommended to have your AWD system checked regularly, typically during your routine vehicle maintenance intervals. Additionally, you should have it inspected if you notice any warning lights or changes in handling.