2015 Toyota Avalon Cruise Control Not Working

Common Causes of Cruise Control Malfunctions in Your 2015 Toyota Avalon and How to Fix Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2015 Toyota Avalon cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2015 Toyota Avalon cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the initial diagnostic steps to take when the cruise control is not working on a 2015 Toyota Avalon?

When your cruise control isn't functioning on a 2015 Toyota Avalon, start by checking the switches, as they are often the primary culprits. Ensure that the main cruise control switch, set switch, and resume switch are all operational. Next, inspect the electrical connections and fuses, as any blown fuses or faulty wiring can disrupt the system's functionality. The vehicle speed sensor is another critical component; if it fails to provide accurate data, the cruise control will not engage properly. If the check engine light is illuminated, use an OBDII scanner to retrieve error codes, as these can point to underlying issues affecting the cruise control. Additionally, verify the brake light switch, since a malfunction here can cause the cruise control to deactivate automatically. For vehicles with a throttle cable or throttle-by-wire system, check the actuator to ensure it is functioning correctly. If you're comfortable, you can also enter diagnostic mode to gather more specific error codes. If these steps do not resolve the issue, consulting the vehicle's service manual or seeking professional assistance may be necessary for further diagnosis and repair.

What are the common problems that could cause the cruise control to stop working in a 2015 Toyota Avalon?

When troubleshooting cruise control issues in a 2015 Toyota Avalon, several common problems may be at play. One of the first components to check is the brake pedal switch, as a malfunction here can prevent the cruise control from engaging by falsely signaling that the brake is always pressed. Additionally, inspecting the fuses related to the cruise control system is crucial; a blown fuse can disrupt electrical functions, and if it continues to blow after replacement, it may indicate deeper electrical issues. The speed sensor is another critical element, as any damage can lead to inaccurate speed readings, hindering the cruise control's operation. While less common in newer models, mechanical components like the vacuum actuator or throttle cable should also be examined, especially in older vehicles. For those with dynamic radar cruise control, ensure that sensors and cameras are free from obstructions or condensation, as these can interfere with system performance. Lastly, general electrical malfunctions, including issues with the cruise control computer or wiring, can also cause problems. By systematically checking these areas, you can often identify and resolve the issue without needing to visit a dealership.

How urgent is it to address the non-functioning cruise control in a 2015 Toyota Avalon?

When dealing with a non-functioning cruise control in a 2015 Toyota Avalon, understanding the urgency of the situation is crucial. The primary concern is safety; a malfunctioning cruise control system can lead to dangerous scenarios, especially if it fails to disengage when the brake pedal is pressed, resulting in unintended acceleration. While the absence of cruise control may not hinder the vehicle's basic operation, it can compromise driving comfort and convenience. Additionally, the root cause of the malfunction could indicate more serious electrical issues, such as a blown fuse or problems with the brake pedal switch, which, if left unaddressed, might escalate into more significant repairs. Therefore, it is advisable to promptly check the fuses and inspect related components to mitigate any safety risks and ensure the vehicle remains in optimal working condition. Ignoring these symptoms could lead to further complications, making it essential to take action sooner rather than later.

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