What To Do When Cruise Control Not Working?

Cruise control is a very important system in the car as it controls the speed of the car to make the drive smooth and steady. It is known by various names as speed control, auto cruise, or tempo mat. When the fuse of cruise control blows, the cruise control will stop working altogether.

If cruise control not working, there can various reasons, like if the vacuum actuator has stopped working or vacuum hoses are damaged. The system may also fail if the cable linking the actuator to the throttle is broken.

4 Reasons Why Your Cruise Control Not Working

List of reasons why your car is facing this problem. There can be various reasons, some of which are:

1. Faulty Break Paddle Switch

When you tread on the treadle, the brake lights activate. This can be because of the treadle switch. Additionally, to inflicting hassle with the brake lights, a broken treadle switch also can cause the control to prevent operating. How? consider it this way: what happens once you tread on the brakes whereas control is on? It shuts off mechanically, returning manual management to you. If the switch is broken and your vehicle’s treadle is often being depressed, it will not let the control activate. Additionally to being inconvenient, this will be dangerous. After all, drivers can have to be compelled to grasp once you are braking and once you are not.

2. Damaged Speed Sensor

Can you guess what the speed sensing element will do in your Toyota? That is right, it senses speed (specifically, how briskly your vehicle is traveling). Cruise control not working can also be due to a broken speed sensing element that might cause the control to not work properly thanks to inaccurate readings. Since a broken speed sensing element may cause issues with the speed indicator, it ought to be mounted promptly.

3. A Blown Fuse

If your control system is electronically controlled, it’ll have an associate degree associated fuse. If there is an associate degree electrical downside, the fuse can fail to stay different wiring from obtaining broken. Strive commutation the fuse. If it solves the matter and also the control keeps operating, that is great! but, if the fuse blows once more, there could also be deeper electrical issues that you will have to deal with.

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 4. Damaged Mechanical Control

If you are driving associate degree older automotive, there is a probability that the control could also be mechanical. Mechanical control may be a comparatively straightforward system: a cable connects the throttle to a region referred to as the vacuum mechanism. The mechanism adjusts the cable counting on the cruise control’s setting. If the vacuum mechanism is leaky, or if either part is broken, the control might not work.

Designed to scale back stress and fatigue for long distances, the version of the system used nowadays was fabricated in 1948 by blind engineer Ralph Teetor who was pissed off that his driver unbroken dashing up and retardation down on highways.

When engaged, control maintains a specific speed while not requiring direct driver input. Speed is enhanced or reduced by the cruise control buttons, that area unit is sometimes settled on the handwheel. Drivers will disable it at any time by just tapping on the accelerator or pedal.
The brain of the system is that the management controller module (CCM) that records the speed at that the vehicle is driven and takes control of the throttle body to keep up it.
Over the years, the manner the throttle body is controlled has modified dramatically. The terribly 1st systems used a vacuum motor and cable that were eventually replaced by electrical motors.
Modern management|control|controller} systems use drive-by-wire or electronic throttle control systems (ETCS), with the feature integrated into the engine management module (ECM), that controls the throttle body. Regardless of the look, this technique isn’t failproof, and a number of other factors will lead it to prevent functioning.

Troubleshooting Your Cars Cruise Control?

Here are some things which must be checked if car cruise control doesn’t work.

 1. Check Engine Light

Vehicles equipped with ETCS can mechanically disable control if there’s a problem with the engine or transmission, thus if a check engine light lights up when beginning the engine, get the vehicle to a mechanic as before long as potential.

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2. Taillight Bulbs and Brake Switch

In several vehicles, a tangle with the brake lights can for good disengage the system. If one in every one of the bulbs within the taillights is blown, have it replaced and check if the control will currently be engaged.
If none of the brake lights area unit operating, then the offender can be the visual signal switch. This part is typically connected to the foot lever and engages the lights once you press it.

It’s not very expensive to interchange, however, it’d prove tough to try to do it yourself, thus we have a tendency to suggest that you just take the vehicle to an expert mechanic.

3. Fuses And Relays

In some vehicles, fuses, and relays shield the system, therefore a blown one will cause the controller to prevent functioning.
Check the fuse box, that is found either within the engine bay or behind the glovebox. For the precise location of the controller fuse and relay, check your vehicle’s owner manual.

4. Faulty Speed Device

Every trendy vehicle sometimes has multiple speed sensors, and therefore the CCM uses information from a minimum of one in all of them to keep up the specified speed. If it happens to fail, that isn’t in the least uncommon, then the entire system can stop functioning.

5. Vacuum Leak

Like I discussed before, older vehicles use vacuum actuators to regulate the throttle body once the controller is engaged. If there’s a leak in one of all the hoses, then the system is disabled.

Vacuum leaks may also cause the engine to idle at higher RPMs, therefore keep a watch on the tachometer. If you notice any irregularities, you wish to require the vehicle to a mechanic WHO will determine and fix this leak.

How Much Does It Cost?

The average cost for a control switch replacement can be between $164 and $178. Labor costs are estimated between $54 and $68. however, the cost can vary from place to place.


If the matter persists even in spite of everything the on top of parts were checked and located to operate properly, then the cause lies within the vehicle’s electrical system. The controller button itself or one in all the many wires will cause this issue, however, to properly determine why cruise control not working, a certified automotive trained worker has to perform a comprehensive set of checks.

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