2015 INFINITI Q70L Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2015 INFINITI Q70L

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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 INFINITI Q70L 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 INFINITI Q70L 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 steps should I take to diagnose the non-functioning cruise control in my 2015 INFINITI Q70L?

To effectively diagnose the non-functioning cruise control in your 2015 INFINITI Q70L, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box; a blown fuse is a straightforward fix that can often resolve the issue. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can hinder functionality. Following this, verify the speed sensor's operation, since a malfunctioning sensor can disrupt the cruise control system. Additionally, check the brake pedal switch, which is crucial for disengaging cruise control when the brake is applied; ensure it is functioning correctly. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may provide insight into the underlying issue. Should you still be unable to diagnose the problem, seeking assistance from a qualified mechanic or an INFINITI dealership is advisable for a comprehensive evaluation and repair. By following this structured diagnostic approach, you can efficiently identify and address the cause of your cruise control malfunction.

What are the common problems that could cause the cruise control to stop working in a 2015 INFINITI Q70L?

When troubleshooting cruise control issues in a 2015 INFINITI Q70L, 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. Another frequent issue is a malfunctioning speed sensor, as this component is crucial for maintaining a consistent speed; without accurate readings, the cruise control cannot function properly. Additionally, a blown fuse can disrupt the entire cruise control system, so checking the fuses is a straightforward first step in your diagnosis. Throttle control problems, such as a stuck throttle or issues with the throttle position sensor, can also hinder the system's ability to maintain speed. Furthermore, the Electronic Control Module (ECM) plays a vital role in managing various vehicle functions, including cruise control, and any issues here can lead to system failure. Lastly, inspect the wiring and connections related to the cruise control system, as damaged or loose wiring can significantly impact its operation. By systematically addressing these potential issues, you can effectively troubleshoot and potentially restore the functionality of the cruise control in your INFINITI Q70L.

How urgent is it to address the non-functioning cruise control in a 2015 INFINITI Q70L?

When it comes to the non-functioning cruise control in a 2015 INFINITI Q70L, addressing the issue promptly is essential for maintaining both the vehicle's performance and the driver's comfort. While the malfunction may not present an immediate safety hazard, it can significantly detract from the driving experience, especially during long trips where cruise control is typically utilized to reduce fatigue and enhance fuel efficiency. Moreover, neglecting this problem could lead to more complex issues within the vehicle's electronic systems, potentially resulting in costly repairs down the line. Therefore, it is advisable to consult a qualified mechanic or dealership as soon as possible to diagnose and rectify the issue, ensuring that the cruise control system operates effectively and preventing any further complications that could arise from inaction.

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