2018 Toyota Yaris IA Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2018 Toyota Yaris iA

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Reviewed by
Andrew Hajjar
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 2018 Toyota Yaris iA 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 2018 Toyota Yaris iA 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.

What are the initial diagnostic steps to take when the cruise control isn't working on a 2018 Toyota Yaris iA?

When faced with a malfunctioning cruise control system in your 2018 Toyota Yaris iA, it's important to approach the diagnosis methodically. Start by checking the cruise control fuse in the fuse box, as a blown fuse can easily disrupt the system's functionality. Next, verify the speed sensor's operation, since this component is vital for the cruise control to engage properly; a faulty sensor can lead to significant issues. Additionally, inspect the brake lights, as they are interconnected with the cruise control system; if they are not functioning correctly, the cruise control may not activate. It's also wise to examine the wiring connections for any signs of damage or looseness, as faulty wiring can impede communication between the system's components. Finally, consider using a diagnostic scanner to check for any error codes that may provide further insights into the underlying problem. By following these steps, you can effectively diagnose and potentially resolve the cruise control issues on your Yaris iA, saving time and money on repairs.

What are the common problems that could cause the cruise control to stop working in a 2018 Toyota Yaris iA?

When the cruise control in your 2018 Toyota Yaris iA stops functioning, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty brake pedal switch, which can disrupt the system's ability to engage or disengage properly. Additionally, if the speed sensor is malfunctioning, it may provide inaccurate readings, leading to cruise control failure. A blown fuse is another simple yet often overlooked issue that can prevent the cruise control from operating. Furthermore, problems with the throttle actuator can hinder the system's ability to maintain the desired speed. Lastly, any electrical issues, such as damaged wiring or a malfunctioning control module, can also contribute to cruise control problems. By systematically checking these components, you can effectively troubleshoot and potentially resolve the issues with your vehicle's cruise control system.

How urgent is it to address the malfunctioning cruise control in my 2018 Toyota Yaris iA?

When it comes to the malfunctioning cruise control in your 2018 Toyota Yaris iA, the urgency of addressing the issue cannot be overstated. A faulty cruise control system poses significant safety risks, as it can lead to unexpected changes in speed, making it difficult to maintain control of your vehicle, particularly in high-traffic situations. This unpredictability not only endangers your safety but also that of other road users. Moreover, neglecting this issue can exacerbate the problem, potentially leading to more extensive damage to your vehicle's systems, which could result in costly repairs down the line. By prioritizing the diagnosis and repair of your cruise control malfunction, you ensure not only a safer driving experience but also the optimal performance and longevity of your vehicle. Therefore, it is crucial to consult a qualified mechanic at the earliest opportunity to mitigate any risks associated with this malfunction.

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