What Is The ASC System Service Required Light?

If you own a Mitsubishi, you might have seen a puzzling warning light on the dashboard of your car. It says, “ASC System Service Required.” The Active Stability Control (ASC) system warning light is on, and it signifies that one or more of the ASC system’s components may be malfunctioning. The ASC system service required light on your car’s dashboard is a typical yet frequently misunderstood warning. This indicator light is related to the Automatic Stability Control (ASC) system in your car.

Which is essential for improving driving stability. Therefore, in this post, we will examine the causes of the ASC system service required light, look at easy fixes, and provide you advice on how to maintain a safer and more pleasurable driving experience.

What Is The ASC System Service Required Light?

Imagine yourself behind the wheel on a slick or rainy road. Your car’s tyres may occasionally lose traction and begin to slide or skid. When the tyres aren’t adequately gripping the road. It’s more difficult to manoeuvre and stop the automobile, which can be dangerous. This is where the ASC system can be useful.

Moreover, your car’s behaviour is continuously monitored by the ASC system using sensors. The automobile’s speed at which each wheel spins, how much you crank the steering wheel, and even whether the car is beginning to skid or slide are all factors that the computer monitors. If it notices that your automobile might be slipping out of control, it intervenes to help.

How Does ASC System Service Light Works?

In an emergency, the ASC system is a crucial safety component that could save your life. It functions by lowering the possibility of a rollover, increasing vehicle stability, and lowering the risk of oversteering or understeering during high-speed manoeuvres.

1. Sensors:

The ASC system is equipped with sensors that are affixed to the car’s wheels and other components. These sensors provide data to the system’s “brain,” which is a computer.

2. Computer Mind:

The computer swiftly processes all of the sensor data. It determines whether any wheels are turning too quickly or slowly, whether the automobile is beginning to skid, or whether you are turning the steering wheel excessively.

3. Power Adjustment:

The computer has the ability to gradually limit the power going to a wheel if it detects that one of the wheels is spinning too quickly (for example, when you accelerate and a tyre starts to slide on a slick road). This aids in the tyre regaining traction and reduces excessive tyre spinning.

4. Brake Control:

The computer has the ability to apply the brakes to individual wheels if it detects that the vehicle is about to slide or skid. By slowing down the spinning wheels and improving your ability to steer, this aids in regaining control of the vehicle.

5. Assistance With Stability:

In specific circumstances, the ASC system can also collaborate with other automotive components, such as the engine and brakes, to help stabilise the vehicle during abrupt turns or swerves. It assists in keeping the car moving in the desired direction and preventing it from veering off course.

Therefore, to put it simply, the ASC system functions as a smart assistant for your car. It monitors your car’s behaviour using sensors and a computer and intervenes when conditions become slick or you’re in danger of losing control. In order to keep you safe and steady when driving, particularly on rough roads, it modifies the power going to the wheels and employs the brakes.

Reasons For System Service Light To Come On

The ASC system service required light might come on for a number of reasons, such as issues with the ABS, traction control, or stability control system. When the system notices a flaw or failure that could impair the vehicle’s stability and control, this warning light is intended to illuminate. Depending on the make and model of the car, the warning light can appear in a variety of ways, but it typically takes the form of a yellow or amber car with squiggly lines behind it.

1. Incorrect Wheel Speed Sensor:

A broken wheel speed sensor is one of the most frequent reasons for the warning light to come on. The wheel speed sensor is in charge of keeping track of each wheel’s speed and reporting it to the ASC system. The system might not get the right speed data if one of the four sensors malfunctions, which could lead to a malfunction and turn on the warning light.

2. Ineffective ABS System:

A broken ABS system is another frequent reason why the ASC system warning light illuminates. Since the ASC system and the ABS system are interdependent, an issue with the ABS system may result in a malfunction of the ASC system and the activation of the warning light. A broken hydraulic pump, faulty sensors, or damaged wiring can all affect the ABS system.

3. Defective Yaw Rate Sensor:

The ASC system warning light may also illuminate due to a malfunctioning yaw rate sensor. The vehicle’s rate of rotation along its vertical axis is measured by the yaw rate sensor. The yaw rate sensor’s data is essential for detecting whether the car is understeering or oversteering. The ASC system may not be able to accurately detect the vehicle’s movement if the sensor malfunctions, which could result in a loss of stability and control.

4. Battery Problem:

Another potential reason for the ASC system warning light to illuminate is low battery voltage. A steady power source is necessary for the ASC system to function properly. The voltage levels and system performance may be impacted by a weak or discharged battery, which could also turn on the warning light.

5. Failed Control Module:

The electronic control modules used by the ASC system evaluate sensor information and adjust engine or braking power as necessary. The system might not operate correctly, which would cause the warning light to turn on if there is a problem with one or more control modules.

6. Low Brake Fluid:

For the ASC system to function properly, the brake fluid level must be constant. The hydraulic pressure of the system may be impacted by low brake fluid levels, which could result in a malfunction and turn on the warning light.

7. Blowing A Fuse:

The ASC system’s electrical circuit can have a blown fuse, which can result in a malfunction and illuminate the warning light. Fuses may blow as a result of electrical issues or system overload, which may result in a short circuit.

Therefore, these are some common reasons for the ASC system service required light to come on while driving the car.

How To Fix The ASC System Service Light?

Your car’s ASC (Automatic Stability Control) system is essential for preserving stability and traction. A potential problem is indicated if the ASC System Service Required light illuminates. To identify and solve the issue, follow these steps.

1. Security First:

Make sure to park your car securely, turn off the engine, and use the parking brake.

2. Engine Restart:

Restart the automobile after shutting it off. Sometimes a small glitch will cause the light to turn on, but this bug can be fixed by doing this.

3. Check Traction Control Button:

Make sure the Traction Control button hasn’t been unintentionally deactivated. Turn it on if it’s off and check to see if the light goes out.

4. Examination Of Wheel Speed Sensors:

The light may come on if the wheel speed sensors are dirty or broken. Look for debris or obvious damage on each sensor. Replace or clean as necessary.

5. Examine The Brake System:

Stability control difficulties can impact the brakes. Search for any indications of a malfunction, such as leaking brake fluid or damaged brake pads. Deal with any brake-related issues.

6. Align The Wheels:

The ASC light may come on due to improper wheel alignment. If required, have a professional examine your alignment.

7. Check The ABS System:

The ASC is connected to the ABS (Anti-lock Braking System). ABS problems may have an effect on ASC. Get the ABS system checked out and fixed.

8. Lookup Error Codes:

To extract error codes from the car’s computer, use an OBD-II scanner. These codes give precise details about the issue.

9. Visit A Specialist:

Take your car to a qualified mechanic if you can’t figure out the problem. They can use specialised tools to carry out a complete diagnosis.

10. Set The Light Back:

A mechanic can use their diagnostic instruments to resolve the problem and then turn off the ASC System Service Required light.

11. Test Drive:

Perform a brief test drive to make that the ASC system is operating properly and the light is not on.

12. Continual Upkeep:

To avoid more ASC light difficulties, maintain regular auto maintenance, including monitoring tyre pressure, brakes and other crucial systems.

Do not forget the ASC System Service. Required lights often indicate problems with traction control and stability systems. Your car’s performance and safety can be guaranteed with prompt diagnostics and repair.


Consequently, the ASC system service required light is a critical warning indicator that points to a problem or malfunction with the vehicle’s stability control system. The ASC system is a crucial safety component that guarantees your car’s control and stability during manoeuvres at high speeds. If the light comes on, it is essential to have the system examined and fixed by a licenced mechanic. If the warning sign is ignored, the vehicle’s stability and control may be compromised, which may cause accidents and injuries.

Now, that we’ve covered all the aspects of your query. We hope the above-mentioned information will be helpful to all the viewers. Additionally, if anyone faces any doubts feel free to contact us. Thank you for reading!

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