2003 INFINITI FX35 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2003 INFINITI FX35 and How to Fix Them

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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 2003 INFINITI FX35 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 2003 INFINITI FX35 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2003 INFINITI FX35?

When troubleshooting the non-functional cruise control in a 2003 INFINITI FX35, it's essential to adopt a methodical diagnostic approach. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a straightforward issue that can easily disrupt the system. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as malfunctioning buttons can prevent engagement. Following this, verify the speed sensor's functionality, since it is critical for the cruise control to operate correctly; a faulty sensor can hinder the system's ability to maintain speed. Additionally, examine the brake pedal switch, which is designed to disengage cruise control when the brake is applied; if this switch is defective, it may inadvertently disable the system. Don't forget to check the throttle cable for any signs of damage or obstruction, as a malfunctioning cable can impede the cruise control's performance. Finally, using a diagnostic scanner to check for error codes can provide deeper insights into any underlying issues affecting the cruise control system. By following these steps in order, you can effectively diagnose and potentially resolve the cruise control problem in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2003 INFINITI FX35?

When troubleshooting the cruise control system in a 2003 INFINITI FX35, it's essential to understand the common problems that could lead to its failure. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, a defective speed sensor can disrupt the system's ability to maintain a constant speed, resulting in erratic behavior or complete failure. Another potential issue is a blown fuse, which can cut off power to the cruise control system entirely. It's also important to check for vacuum leaks in the engine, as these can affect the vacuum pressure necessary for the cruise control to function properly. Lastly, a malfunctioning cruise control module may be responsible for the system's inability to engage or maintain speed. If you encounter issues with your cruise control, consider these common problems as a starting point for your DIY diagnosis, but remember that consulting a qualified mechanic may be necessary for a thorough inspection and repair.

How urgent is it to repair the non-functioning cruise control in a 2003 INFINITI FX35?

When it comes to the urgency of repairing the non-functioning cruise control in a 2003 INFINITI FX35, several critical factors come into play. First and foremost, safety is paramount; a malfunctioning cruise control system can lead to erratic speed changes, increasing the risk of accidents and distracting the driver. This is particularly concerning during long highway drives where maintaining a consistent speed is essential for safe travel. Additionally, the comfort and convenience that cruise control offers cannot be overlooked. It allows drivers to relax and enjoy their journey without the constant need for manual speed adjustments, making long trips more enjoyable. Furthermore, addressing this issue promptly can significantly impact the vehicle's resale value. Potential buyers are often wary of vehicles with unresolved mechanical problems, and a non-functioning cruise control system could deter them, ultimately affecting the car's marketability. Therefore, it is advisable to prioritize the repair of the cruise control system not only for immediate safety and comfort but also for the long-term value of the vehicle.

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2003 INFINITI FX35 Cruise Control Issues & Repair Costs