Cruise control systems in vehicles are designed to enhance the driving experience, granting drivers the convenience of maintaining a consistent speed without the need to keep their foot on the accelerator pedal. While Subaru vehicles are known for their reliability and performance, there are times when you might encounter issues with the cruise control system. If you find yourself in a situation where your Subaru cruise control is not working, you’re not alone. This article will explore the potential causes of this common issue, offer troubleshooting tips, and provide solutions to help you get back on the road safely.
Common Reasons for Cruise Control Malfunction in Subaru
Understanding the reasons behind cruise control malfunction is the first step in resolving the issue. Here are some common causes you should consider:
1. Electrical Problems
One of the primary reasons for cruise control failure is electrical issues. Electrical connections are crucial for the proper functioning of the cruise control system.
- Faulty Wiring: Damaged or frayed wiring can cut off power to the cruise control system, rendering it ineffective.
- Blown Fuse: There are specific fuses dedicated to the cruise control mechanism. If a fuse blows, it can disable the entire system.
2. Sensor Malfunctions
Subaru vehicles rely on various sensors to operate the cruise control smoothly. Any malfunctions in these sensors can disrupt the system.
- Speed Sensor Failure: The vehicle speed sensor monitors the speed of the car. If it fails, the cruise control may not engage.
- Throttle Position Sensor (TPS): This sensor ensures that the throttle responds correctly to the cruise control commands. A faulty TPS can lead to inconsistent acceleration or failure to set a speed.
3. Mechanical Issues
Sometimes, the cruise control not working can be symptomatic of underlying mechanical issues.
- Worn-out Components: Over time, components such as the brake pedal switch or the cruise control actuator can wear out and fail.
- Brake Light Switch Problems: The cruise control system automatically disengages when the brake pedal is pressed. If the brake light switch is malfunctioning, it might send a false signal, causing the cruise control to turn off abruptly.
Troubleshooting Your Subaru’s Cruise Control
If you’re facing issues with your Subaru’s cruise control, here are some steps you can take to troubleshoot the problem before heading to a mechanic.
Step 1: Check the Manual
Your first step should always be to consult the owner’s manual. It can provide you with insightful information regarding the cruise control features specific to your vehicle model and year.
Step 2: Inspect the Cruise Control Switch
Verify that the cruise control switch is not stuck or damaged. A simple reset might bring the system back to life.
- Make sure the switch is in the ‘ON’ position.
- Look for any visible signs of wear or damage.
Step 3: Examine The Fuses
A blown fuse may be the simplest explanation for your cruise control failure. Inspect the fuse box for any blown fuses and replace them if necessary. Here’s how you can check:
- Locate the fuse box, usually found under the dash or in the engine compartment.
- Identify the fuse assigned to the cruise control system as indicated in the manual.
- Remove the fuse and check for continuity with a multimeter.
Step 4: Inspect The Brake Lights
As mentioned earlier, problems with the brake light switch can interfere with cruise control operation. Check if your brake lights are functioning correctly:
- Perform a solid check on the brake light functionality. Ask a friend for assistance or back your Subaru against a reflective surface to observe if the lights illuminate when you press the brake pedal.
Step 5: Check for Diagnostic Trouble Codes (DTCs)
A professional-grade OBD-II scanner can help you identify any underlying issues indicated by Diagnostic Trouble Codes (DTCs). Some codes may point directly to the cruise control system, while others may highlight further electrical issues.
When to Seek Professional Assistance
While troubleshooting can sometimes resolve the issue, there are situations when it’s advisable to consult a professional mechanic:
1. Persistent Issues
If your cruise control remains inoperable after thorough troubleshooting, it may be indicative of more complex electrical or mechanical problems that require expert diagnosis.
2. Unfamiliarity with Systems
If you’re unsure about your ability to safely inspect or repair the vehicle, it’s best to leave this to professionals. Many intricate systems can be complicated and might inadvertently cause more damage if not handled properly.
3. Warranty Considerations
If your Subaru is still within its warranty period, avoid making any unauthorized repairs. This might void your warranty. Reach out to your nearest Subaru dealership or authorized service center to avoid any risks.
Possible Solutions for Cruise Control Malfunction
If you’ve been able to identify the issue with your Subaru’s cruise control, here are several solutions to consider.
1. Replace Faulty Components
If you’ve diagnosed your issue as stemming from faulty wiring or components, make the necessary replacements. This might involve changing out a bad fuse, replacing the brake light switch, or swapping out a faulty throttle position sensor.
2. Seek Electrical Repair Services
For complex electrical issues, getting professional advice is often the best way to go. Mechanics equipped with specialized tools can solve electrical faults efficiently.
3. Regular Maintenance Checks
Prevent future cruise control issues by regularly maintaining your vehicle. Scheduled maintenance checks can catch small issues before they evolve into significant problems.
Regular Maintenance Considerations:
- Inspect electrical connections and wiring.
- Use quality fluids to keep components clean.
Final Thoughts
Cruise control is an essential feature in modern vehicles, easing the burden of long drives and improving fuel efficiency. However, if you find your Subaru cruise control not working, consider the various potential issues that might be at play. By following the troubleshooting steps outlined in this article, you can often diagnose and resolve the problem yourself. Should the issue persist, don’t hesitate to seek professional mechanics who can identify and fix the underlying causes.
With a better understanding of your Subaru’s cruise control system, you can enhance your driving experience and enjoy the open road without unnecessary interruptions. Maintain your vehicle, heed any warning signs, and don’t shy away from seeking help when required. Happy driving!
What are common reasons why Subaru cruise control might fail?
Cruise control systems in Subaru vehicles can fail for several reasons, with one of the most common being a malfunctioning brake switch. The brake switch is an essential component that disables cruise control when the brakes are pressed. If this switch is faulty, it can send incorrect signals to the cruise control system, preventing it from engaging.
Another common issue could be related to the vehicle’s speed sensor. The speed sensor provides real-time data about the vehicle’s speed to the cruise control module. If this sensor is malfunctioning, it may not relay accurate information, leading to the cruise control not activating or disengaging unexpectedly.
How can I diagnose the problem with my cruise control?
To diagnose the issue with your Subaru’s cruise control, start by checking the dashboard for warning lights. If the cruise control system is malfunctioning, it may trigger a warning light that can provide clues to the problem. Additionally, examine the cruise control switch and associated wiring for visible damage or wear that could inhibit operation.
If no obvious issues are present, consider performing a diagnostic scan using an OBD-II scanner. This tool can provide trouble codes that offer insight into specific electronic issues related to the cruise control system, allowing you to pinpoint the malfunction more effectively and decide if a repair is needed.
Can weather conditions affect my cruise control functionality?
Yes, weather conditions can influence the functionality of your Subaru’s cruise control. For instance, during heavy rain, snow, or icy conditions, the system may become disabled as a precautionary measure. This is due to safety mechanisms that reduce the risk of losing vehicle control in poor traction situations.
Additionally, extreme cold or heat can impact electronic components required for cruise control functionality. If the system is not working properly in certain weather conditions, it is often best to manually control your speed until the weather improves or the system is examined.
Is it safe to use cruise control in hilly areas?
Using cruise control in hilly areas can be a bit tricky. When navigating steep hills, the cruise control system may struggle to maintain a constant speed, causing the vehicle to slow down on inclines and accelerate rapidly on declines. This behavior might lead to unexpected surges in speed, which can compromise safety.
Most manufacturers, including Subaru, recommend exercising caution when using cruise control on hilly terrain. It’s important to remain vigilant and prepared to take over manual control of the vehicle to maintain safe speeds and respond effectively to the road conditions.
What should I do if my cruise control system is under warranty?
If your Subaru’s cruise control system is not working and your vehicle is still under warranty, your first step should be to contact your dealership. They will typically perform a comprehensive diagnostic inspection to determine the cause of the issue. If it is covered under the warranty, they should take care of the necessary repairs at no cost to you.
Be sure to document any symptoms or issues you are experiencing with the cruise control. This information can assist the technician in pinpointing the problem more quickly, ensuring the warranty claim is processed efficiently and effectively.
Can I fix cruise control issues myself?
While some cruise control problems are simple and can be fixed at home, others may require professional expertise. Basic checks, such as inspecting fuses, switches, and wiring, can be done by most car owners. If you identify issues like a blown fuse or a damaged wire, replacing them is often manageable without advanced mechanical skills.
However, for more complex issues involving the speed sensor or electronic control units, it might be best to consult with a qualified mechanic. Attempting repairs beyond your skill level can risk further damage to the vehicle or the cruise control system, resulting in more costly repairs down the line.