Toyota Highlander Remote Start Not Working? Troubleshooting Guide & Fixes

The Toyota Highlander is a popular midsize SUV known for its reliability and family-friendly features. However, some owners may experience issues with the remote start function not working as intended. This can be frustrating, especially in colder climates where pre-warming the vehicle is beneficial. Common reasons for remote start failure include issues with the key fob battery, problems with the vehicle’s electrical system, or interference from other electronic devices. Understanding these potential causes can help Highlander owners troubleshoot and resolve the issue effectively.

Common Reasons for Toyota Highlander Remote Start Malfunctions

The Toyota Highlander is a popular midsize SUV known for its reliability and advanced features, including the convenience of remote start. However, there are instances when the remote start function may not work as intended, leading to frustration for the vehicle owner. Understanding the common reasons behind these malfunctions can help diagnose the issue and facilitate a resolution.

One of the primary reasons for remote start failure in the Toyota Highlander is a weak or dead key fob battery. The remote start feature relies on the key fob to send a signal to the vehicle, and if the battery in the fob is low or depleted, the signal may not be strong enough to activate the remote start function. Therefore, checking the battery status of the key fob is a crucial first step in troubleshooting this issue. Replacing the battery is a simple and cost-effective solution that can often restore functionality.

Another common cause of remote start malfunctions is the vehicle’s security system. The Highlander is equipped with various safety features designed to prevent unauthorized access and ensure the vehicle’s security. If the security system detects an issue, such as an open door or a malfunctioning sensor, it may disable the remote start feature as a precautionary measure. Consequently, it is essential to ensure that all doors are securely closed and that there are no alerts or warning lights on the dashboard that could indicate a problem with the vehicle’s systems.

In addition to security concerns, environmental factors can also play a role in remote start functionality. For instance, extreme weather conditions, such as very low temperatures or heavy precipitation, can affect the performance of the remote start system. Cold weather can cause the vehicle’s battery to lose charge more quickly, while moisture can interfere with the key fob’s signal. In such cases, it may be beneficial to try using the remote start feature in more favorable conditions to determine if the issue persists.

Moreover, the remote start feature may be disabled if the vehicle is not in the correct gear. For safety reasons, the Highlander is designed to prevent remote start activation if the transmission is not in the “Park” position. Therefore, ensuring that the vehicle is properly parked and that the gear selector is in the correct position is essential for successful remote start operation. Additionally, if the vehicle has been recently serviced or if any modifications have been made to the electrical system, these changes could inadvertently affect the remote start functionality.

Lastly, software glitches or updates may also contribute to remote start issues. Like many modern vehicles, the Toyota Highlander relies on complex software systems to manage various functions, including remote start. If there has been a recent software update or if the system has encountered a glitch, it may be necessary to reset the vehicle’s systems or consult with a dealership for further assistance. In some cases, reprogramming the key fob may also be required to restore the remote start feature.

In conclusion, while the remote start feature of the Toyota Highlander is a valuable convenience, several factors can lead to its malfunction. By systematically checking the key fob battery, ensuring the security system is functioning correctly, considering environmental conditions, verifying the gear position, and addressing any software issues, owners can often identify and resolve the problem effectively. Understanding these common reasons can empower Highlander owners to troubleshoot remote start issues with confidence.

Troubleshooting Steps for Toyota Highlander Remote Start Issues

Experiencing issues with the remote start feature of your Toyota Highlander can be frustrating, especially during cold mornings or hot afternoons when you rely on this convenience to prepare your vehicle for driving. Fortunately, there are several troubleshooting steps you can take to identify and potentially resolve the problem. First and foremost, it is essential to ensure that your key fob is functioning correctly. A weak or dead battery in the key fob can prevent the remote start feature from working. To address this, check the battery by pressing the lock or unlock button; if the lights on the fob do not illuminate, it is time to replace the battery.

Once you have confirmed that the key fob is operational, the next step is to verify that the remote start system is enabled. In some cases, the remote start feature may be disabled due to settings in the vehicle’s onboard computer. To check this, consult your owner’s manual for instructions on how to access the settings menu. If the remote start option is turned off, you can enable it following the provided guidelines.

Additionally, it is crucial to ensure that all doors are properly closed and locked before attempting to use the remote start feature. The system is designed to prevent accidental starts if any doors are ajar, as this could pose a safety risk. Therefore, inspect each door, including the trunk, to confirm they are securely closed. If any door is not fully latched, the remote start will not activate.

Another important aspect to consider is the vehicle’s security system. If your Highlander is equipped with an aftermarket alarm or immobilizer, it may interfere with the remote start functionality. In such cases, it is advisable to consult the installation manual of the alarm system or contact a professional installer to ensure compatibility with the remote start feature.

Moreover, environmental factors can also play a role in the remote start operation. For instance, if the vehicle’s battery is low or if there are extreme weather conditions, such as very low temperatures, the remote start may not function as intended. In these situations, it is beneficial to check the vehicle’s battery health and consider charging or replacing it if necessary.

If you have gone through these troubleshooting steps and the remote start feature is still not working, it may be time to consider potential software issues. Occasionally, the vehicle’s software may require an update to ensure all features are functioning correctly. To check for updates, visit your local Toyota dealership, where they can perform a diagnostic check and update the software if needed.

In conclusion, while encountering issues with the remote start feature of your Toyota Highlander can be inconvenient, following these troubleshooting steps can help you identify the root cause of the problem. By checking the key fob battery, ensuring the remote start system is enabled, confirming that all doors are closed, and considering the impact of the vehicle’s security system and environmental factors, you can systematically address the issue. If all else fails, seeking assistance from a professional can provide further insights and solutions, ensuring that you can enjoy the convenience of remote starting your vehicle once again.

How to Reset the Remote Start System in a Toyota Highlander

If you find that the remote start system in your Toyota Highlander is not functioning as expected, it can be both frustrating and inconvenient. Fortunately, resetting the remote start system is often a straightforward process that can restore its functionality. To begin, it is essential to ensure that your vehicle’s battery is in good condition, as a weak battery can hinder the remote start feature. If the battery is low, consider replacing it before proceeding with the reset.

Once you have confirmed that the battery is functioning properly, the next step involves accessing the vehicle’s key fob. The key fob is the primary tool for initiating the remote start, and any issues with it can directly affect the system’s performance. Start by checking the key fob’s battery; if it is weak or dead, replacing it may resolve the issue. After replacing the battery, test the remote start function again to see if it works.

If the remote start still does not function, you may need to reset the system. To do this, enter your vehicle and close all doors. Insert the key into the ignition and turn it to the “On” position without starting the engine. This action will power up the vehicle’s electrical systems without engaging the engine. After a few seconds, turn the key back to the “Off” position and remove it from the ignition. This step is crucial, as it allows the vehicle’s computer to reset the remote start system.

Following this, you should perform a series of actions with the key fob. Press the lock button on the key fob three times in quick succession. This sequence is designed to communicate with the vehicle’s onboard computer, signaling it to re-establish the connection with the remote start system. After completing this step, wait a moment and then attempt to use the remote start feature again. If successful, the engine should start, indicating that the reset was effective.

In some cases, the remote start system may still not respond after these steps. If this occurs, it may be necessary to consult the vehicle’s owner manual for specific troubleshooting steps related to your model year. The manual often contains valuable information regarding the remote start system and any potential error codes that may be displayed on the dashboard. Additionally, if your Highlander is equipped with a factory-installed remote start system, you may want to contact your local Toyota dealership for further assistance. They can provide expert guidance and may be able to diagnose any underlying issues that could be affecting the remote start functionality.

Moreover, it is worth noting that aftermarket remote start systems may have different reset procedures. If your Highlander has been fitted with an aftermarket system, refer to the installation manual or contact the installer for specific instructions. In conclusion, while a non-functioning remote start system can be a source of annoyance, following these steps can often resolve the issue. By ensuring that the battery is in good condition, resetting the system, and consulting the owner’s manual or dealership if necessary, you can restore the convenience of remote starting your Toyota Highlander.

Conclusion

The Toyota Highlander remote start may not work due to several potential issues, including a dead key fob battery, improper programming of the remote, or interference from other electronic devices. Additionally, the vehicle’s security system or a malfunctioning starter relay could also be contributing factors. To resolve the issue, it is advisable to check the key fob battery, ensure proper programming, and inspect the vehicle’s electrical systems. If problems persist, consulting a professional technician or the dealership may be necessary for further diagnosis and repair.