2017 Mazda CX-9 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Mazda CX-9 and How to Fix Them

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Reviewed by
Bo Fader
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 2017 Mazda CX-9 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 2017 Mazda CX-9 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 troubleshoot the non-functioning cruise control in a 2017 Mazda CX-9?

When troubleshooting the non-functioning cruise control in your 2017 Mazda CX-9, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the cruise control fuse; a blown fuse is a common issue that can easily be resolved by replacing it. Next, inspect the cruise control switch to ensure it is operational, as a malfunctioning switch can prevent the system from engaging. Following this, verify the functionality of the vehicle's speed sensors, which are essential for the cruise control to work correctly. If these initial checks do not resolve the issue, use a diagnostic scanner to look for any error codes that may indicate specific problems within the cruise control system. Lastly, ensure that your brake lights are functioning properly, as a faulty brake light switch can disrupt cruise control operation. By systematically addressing these areas, you can effectively diagnose and potentially fix the cruise control issue in your Mazda CX-9.

What are the common problems that could cause the cruise control to stop working in a 2017 Mazda CX-9?

When troubleshooting the cruise control system in a 2017 Mazda CX-9, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch malfunctions, it can prevent the system from engaging. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain a steady speed, as the system relies on accurate speed readings to function correctly. Another potential issue is a blown fuse within the cruise control circuit, which can easily be checked and replaced if necessary. Furthermore, a malfunction in the throttle control system can hinder the cruise control's performance, making it difficult for the system to engage or disengage as needed. The Electronic Control Module (ECM) is also critical; any glitches or malfunctions here can significantly impact the cruise control's operation. Lastly, wiring issues, such as damaged or loose connections, can disrupt communication between the various components of the cruise control system. By systematically addressing these common problems, you can effectively troubleshoot and potentially restore functionality to the cruise control in your Mazda CX-9.

How urgent is it to address the non-functioning cruise control in a 2017 Mazda CX-9?

Addressing a non-functioning cruise control in a 2017 Mazda CX-9 is crucial for both safety and vehicle performance. When cruise control fails, it may not only diminish the convenience of maintaining a steady speed during long drives but could also signal deeper issues within the vehicle's electronic systems or sensors. Ignoring this problem can lead to increased driver fatigue, especially on extended trips where cruise control is typically utilized, and may compromise overall driving safety. Moreover, a malfunctioning cruise control system could indicate potential risks that might escalate into more significant mechanical failures if left unattended. Therefore, it is essential for DIY enthusiasts to prioritize diagnosing and repairing this issue promptly, ensuring a safer and more efficient driving experience.

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