Troubleshooting Cruise Control Not Working Common Causes & Solutions

why is my cruise control not working

If you like to travel and own a car fitted with cruise control, you know how comfortable it can be to maintain a constant speed! When a cruise control system gets damaged, it is just as annoying as it is dangerous. As mentioned, old cars with cruise control often use a cable that locks the accelerator in place as you activate the system.

Reasons behind cruise control not working

If you find a burnt brake light, just replace it and test the system again. The reason for your cruise control not working could be as simple as a blown fuse to really complex electrical problems. Defective switches, sensors, and even “check engine” light, all could contribute to this problem.

How much does it cost to fix cruise control malfunctions?

If the module cannot detect the speed because of faulty speed sensors, then the cruise control system will automatically deactivate. Vehicle Speed Sensor – There are usually multiple vehicle speed sensors (VSS) on any given vehicle. The CCM might use a VSS feed from the ECM, instrument cluster, or transmission. If that signal is lost, the CCM can’t detect vehicle speed, disabling cruise control.

Reasons Why Your Cruise Control Stopped Working

Both radar and cameras are important components of the adaptive cruise control system. When there’s dirt, debris, or ice covering these sensors, your cruise control can stop functioning. To prevent this, regularly clean your vehicle’s sensors, making sure they’re unobstructed.

why is my cruise control not working

Cruise control systems are designed to disengage whenever your brake pedal gets pressed. Last up on our list of the most common reasons cruise control might not be working is a broken cruise control cable. This is the cable that runs from the cruise control module to the throttle body. The second thing directly connected to the cruise control is the speed sensor. Cruise control fixes your car’s speed as required or set through the cruise control button.

FCA recalls defective cruise controls - Equipment World

FCA recalls defective cruise controls.

Posted: Tue, 12 Jun 2018 07:00:00 GMT [source]

Cruise control is connected to several components of the car, and when it fails it can mean that something could be wrong with the CC itself. It could also be a signal that something wrong is happening with any other component of the car. This way, you can save yourself some trouble, along with gas and effort while driving with the cruise control system active.

Troubleshoot and fix non-functioning cruise control in your vehicle.

Older vehicles use vacuum to control the throttle for the cruise control, and in this case a vacuum leak can heavily affect the cruise control. However, modern cruise controls are fully electric and in most cases will not be affected by a vacuum leak if the check engine light is not illuminated. Another common reason for cruise control not working is a bad brake pedal switch. This switch is located on the brake pedal itself and tells the cruise control system when you’re pressing the brakes. Additionally, issues with the speed sensors will also trigger a check engine light or ABS warning light on your car’s dashboard.

However, in case of the cruise control not working, it’s important to deal with the problem right away. If you turn the system on while it malfunctions, you might not be able to turn it off during the drive. So, you can follow this guide to get all the information about the most common reasons for failing cruise control and get advice on how to fix it.

Inspecting Vacuum Lines

why is my cruise control not working

If the switch fails to function properly, the cruise control may not receive the necessary input to cancel. To test the brake switch, you can use a multimeter to check for continuity when the pedal is pressed. If there is no continuity, it’s likely that the brake switch needs to be replaced. The servo does the work of moving the throttle blades to speed up the vehicle.

Another common cause of cruise control not engaging is a faulty cruise control switch. The switch is the interface between you and the cruise control system, allowing you to activate and control it. If the switch is defective, it may not send the proper signals to the cruise control module, resulting in the system not engaging. The cruise control system relies on a vacuum source to operate efficiently. If there is a leak in the vacuum lines or components, it can disrupt the vacuum pressure, leading to issues with the cruise control function.

One of the first things to check if your cruise control isn’t working is the switch. Finally, there’s a brake pedal switch that tells the system when you’re braking and a cruise control cable that connects the accelerator pedal to the cruise control system. Speed sensors are available on almost four wheels of your car, and a single sensor fault will lead the cruise to stop work. Check the speed sensor by yourself and if you cannot do this, then take your Hyundai to the technician and ask him to check the speed sensors. For some car systems, the cruise control will get disabled when one or multiple brake lights blow. This guide has outlined the most common solutions for this easy-to-fix problem.

While not all cars have this, some cars will have relays that protect the circuit of the cruise control actuator. Moreover, the cruise control usually fails when the cable that links the actuator to the car’s throttle has been damaged. If you happen to have an older car that has cruise control, chances are that your cruise control does not work because of a problem with a throttle cable or vacuum actuator. Moreover, you will be able to tell if there is an issue with your speed sensors when your speedometer acts oddly or gives inaccurate readings. However, a blown fuse will also keep the electrical systems like cruise control from working because no electricity will reach them. One of the most common reasons why your cruise control stopped working is that you have a fuse blown out.

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