What is an ABS warning light inspection?

An ABS warning light inspection is a deep dive into your vehicle’s anti-lock braking system (ABS) for problems. This is to ensure that your ABS does what it is intended to do—preventing your brakes from locking up and allowing you to maintain control of your vehicle in the event of a braking emergency.
In a nutshell, your car’s ABS enables your wheels to keep rotating (and not lock up) when you slam on your brakes. This will help you maintain control of your vehicle and maneuver away from any oncoming vehicles or objects.

How to service an ABS problem

If your ABS light comes on, your vehicle is telling you there is a problem. Take it to a licensed, qualified, and reputable mechanic to diagnose and fix any issues.
Your mechanic will inspect your ABS by following these steps:
  • Use a scan tool to communicate with your car’s ABS module in order to determine what the problem is
  • Check each part of the ABS system (including fuse, control relay, and pump) to identify or rule out any problem components

How do I know if I need to service my car’s ABS?

You will know it’s time to service your car’s ABS when the ABS light turns on
If your car’s ABS light comes on, don’t wait before you take your car to the shop—a faulty speed sensor, failing ABS module, an unresponsive hydraulic pump, or low fluid levels is likely the issue.

Faulty speed sensor

An ABS system’s speed sensors are located on each wheel—these sensors calculate the rate each wheel rotates and then send this information to the ABS module. With this information, the ABS adjusts the braking of each wheel accordingly, depending on road conditions. If a speed sensor has failed, it can knock your car’s entire ABS offline.

Failing ABS module

The ABS module is the hub of the anti-lock brake system—corrosion can hamper the module’s proper functioning, while it can also eat away at the wires connecting the module and the speed sensors.

Unresponsive hydraulic pump

After receiving wheel rotation information from the speed sensors via the ABS module, the hydraulic pump relieves brake fluid pressure in order to prevent a vehicle from losing traction. Sometimes, wear and tear can render a hydraulic pump unresponsive. Dirty brake fluid can also cause the pump to go offline.

Low fluid levels

Your ABS’ fluid levels regulate pressure in the system. If this fluid gets low, air will fill up the ABS system and hamper its functioning.

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