2009 Lexus LX570 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2009 Lexus LX570

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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 2009 Lexus LX570 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 2009 Lexus LX570 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 steps to diagnose the cruise control issue in a 2009 Lexus LX570?

When diagnosing a cruise control issue in a 2009 Lexus LX570, it's crucial to follow a methodical approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, examine the cruise control switch on the steering wheel, since a malfunctioning switch is a common source of problems. Utilizing an OBD-II scanner to check for error codes is also essential, as these codes can provide insights into specific issues affecting the cruise control system. Additionally, ensure that the vehicle's speed sensors are functioning properly, as they are vital for cruise control operation. It's important to inspect the wiring and connections for any signs of damage or corrosion, as faulty wiring can impede performance. Finally, test the cruise control module to confirm it is working correctly. If these steps do not resolve the issue, seeking assistance from a professional mechanic may be necessary for further diagnosis and repair. By systematically addressing these areas, you can effectively troubleshoot and potentially resolve cruise control issues in your Lexus LX570.

What are the common problems that could cause the cruise control to stop working in a 2009 Lexus LX570?

When the cruise control in your 2009 Lexus LX570 ceases to function, it can be frustrating, but understanding the common problems can guide you in diagnosing the issue. One frequent culprit is a faulty cruise control switch, which may prevent the system from engaging or disengaging as intended. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to operate, so checking the fuses is a good first step. Speed sensor issues can also arise, as this component is crucial for maintaining the vehicle's speed; if it malfunctions, the cruise control may not work correctly. Another potential problem is vacuum leaks within the system, which can hinder its ability to maintain a steady speed. Furthermore, a malfunctioning brake light switch can cause the cruise control to disengage unexpectedly when the brakes are applied, leading to safety concerns. Lastly, inspect the throttle cable and its connections, as any issues here can result in erratic cruise control behavior. By systematically checking these components, you can effectively troubleshoot and restore the functionality of your cruise control system.

How urgent is it to address the non-functioning cruise control in a 2009 Lexus LX570?

When it comes to the non-functioning cruise control in a 2009 Lexus LX570, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety risks may not be apparent, neglecting this issue can lead to greater complications down the line. A malfunctioning cruise control system not only diminishes driving comfort but can also contribute to driver fatigue during long trips, making it essential to maintain a consistent speed. Furthermore, ignoring the problem could signal underlying issues within the vehicle's electrical system, potentially leading to more significant repairs and costs. Therefore, addressing the cruise control malfunction promptly is advisable to ensure the vehicle operates smoothly and safely, allowing you to enjoy your driving experience without unnecessary stress. Taking the initiative to diagnose and repair this issue can save you time and money in the long run, reinforcing the importance of timely intervention in vehicle maintenance.

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