INFINITI QX70 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your INFINITI QX70 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a INFINITI QX70 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 INFINITI QX70 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.

Troubleshooting Cruise Control Issues in an INFINITI QX70

When troubleshooting cruise control issues in your INFINITI QX70, begin with the simplest solutions before delving into more complex diagnostics. Start by inspecting the cruise control button for any visible damage or debris that may hinder its function. Next, check the brake pedal switch, as a malfunction here can interrupt the cruise control system. If these components appear to be in good condition, examine the vehicle's fuses, particularly those related to the cruise control system, as a blown fuse can easily disrupt functionality. If the problem persists, consider assessing the throttle actuation and the Vehicle Speed Control (VSC) system, as these are common sources of issues. Finally, if you are still experiencing difficulties, it may be necessary to consult a professional technician to evaluate the control module and any potential sensor failures, ensuring a thorough diagnosis and resolution of the problem.

What Could Cause the Cruise Control to Malfunction in an INFINITI QX70?

When dealing with cruise control malfunctions in an INFINITI QX70, it's essential to understand the common problems that may arise. A failed control module, sensor, or switch can often be the culprit, leading to an inability to set or adjust the cruise control function. Additionally, throttle actuation issues, particularly a faulty throttle position sensor, can cause the engine's computer to mismanage fuel delivery, which may result in black exhaust emissions. Symptoms such as an illuminated warning light on the dashboard or the cruise control system failing to engage are clear indicators of underlying issues. Other potential causes include blown fuses, malfunctioning brake lights, or faulty brake switches, which can disrupt the cruise control's operation. For those looking to tackle this problem themselves, using a scan tool to retrieve trouble codes is a crucial first step, along with inspecting the accelerator pedal position sensor and its wiring for any signs of damage. By identifying and replacing faulty components, DIYers can effectively restore the cruise control functionality in their INFINITI QX70.

Why is the Cruise Control Not Working in an INFINITI QX70?

When the cruise control in your INFINITI QX70 is not functioning, it is crucial to address the issue promptly to ensure your safety on the road. A malfunctioning cruise control system can stem from various problems, including a failed control module, faulty sensors, or issues with the brake pedal switch, all of which can compromise your driving experience. Ignoring these symptoms may not only lead to inconvenience but could also result in more significant damage to your vehicle's systems, such as throttle control or the ABS. Additionally, if the cruise control works intermittently or fails to engage, it may indicate a blown fuse or incorrect settings, such as the snow mode inadvertently preventing activation. By diagnosing and resolving these issues quickly, you can maintain the functionality of your vehicle and avoid potential safety hazards that could arise from a malfunctioning cruise control system.

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