2020 Toyota 4Runner Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2020 Toyota 4Runner 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2020 Toyota 4Runner 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 2020 Toyota 4Runner 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.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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 isn't working on a 2020 Toyota 4Runner?

When your cruise control isn't functioning on a 2020 Toyota 4Runner, it's essential to approach the problem methodically to identify the root cause. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational; faulty buttons can prevent the system from engaging. It's also crucial to verify the speed sensor's functionality, as this component is vital for maintaining your vehicle's speed. Additionally, check the brake lights; if they are not working correctly, this could disable the cruise control as a safety precaution. Finally, using an OBD-II scanner to scan for error codes can provide valuable insights into any underlying issues affecting the cruise control system. By following these steps, you can effectively diagnose and potentially resolve the cruise control malfunction on your 4Runner before seeking professional help.

What are the common problems that could cause the cruise control to stop working in a 2020 Toyota 4Runner?

When the cruise control in your 2020 Toyota 4Runner ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty brake light switch, which is crucial for the cruise control system as it disengages the system when the brake pedal is pressed. If this switch malfunctions, it may prevent the cruise control from engaging at all. Another potential issue could be related to the speed sensor; if this component fails, the cruise control may struggle to maintain a constant speed, leading to erratic behavior. Additionally, a blown fuse in the cruise control circuit can completely disable the system, making it essential to check the fuses if you encounter problems. The cruise control module itself can also be a source of trouble; if it is damaged or not communicating properly with the vehicle's systems, the cruise control will not function as intended. Lastly, issues with the throttle control system can hinder the cruise control's ability to maintain speed, further complicating the situation. By being aware of these common problems, you can take the first steps toward troubleshooting and potentially resolving the issue on your own.

How urgent is it to address the malfunctioning cruise control in a 2020 Toyota 4Runner?

When it comes to a malfunctioning cruise control system in your 2020 Toyota 4Runner, the urgency to address the problem cannot be overstated. A faulty cruise control can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents on the road. For DIY enthusiasts, it’s crucial to recognize that ignoring these symptoms not only jeopardizes your safety but can also lead to more extensive damage to the vehicle’s systems, resulting in costly repairs down the line. Therefore, if you notice any irregularities with your cruise control, it’s advisable to conduct a thorough inspection or consult a qualified mechanic. Taking prompt action not only ensures your safety but also maintains the overall performance and reliability of your vehicle, making it a priority for any responsible car owner.

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2020 Toyota 4Runner Cruise Control Issues & Repairs