How to Fix Brakes ABS Failure

Lead Image
  • 2-4 hours
  • Intermediate
  • 180-300
What You'll Need
New ABS controller
Socket wrench set
Denatured alcohol
Torque wrench

Brakes ABS is a very important feature in a car because it stops the brakes from automatically locking during an emergency stop. If you have been experiencing any of the following symptoms while driving, you may mean that your ABS is failing: squealing, crunching, grinding, soft brake pedal or ABS brake pedal depressing all the way to the floor. If you suspect that your ABS is failing, you will want to remove the wheels of your car to further inspect the area to see if any damage has been done. If the ABS has failed, you may actually be able to notice signs of physical wear and tear on the ABS parts, such as corrosion. One surefire way to know if the ABS is failing is if the sensor light repeatedly comes on. You will definitely want to replace the ABS as soon as you notice these problems occurring. However, this is not a task that should be performed by a novice; you should not feel embarrassed for wanting to consult with a mechanic before you attempt to do this yourself. So if you think you are up to the task, follow the steps in this article precisely in order to replace your ABS.

Step 1 – Choosing The Right ABS Controller

First, you will need to determine what ABS controller is right for your car. Keep in mind that it will have to be compatible with your car. Typically, you will want to get the same kind of controller that you are replacing, but if you have never replaced them, you may want to see what other kinds can work with your car to achieve maximum performance.

Step 2 – Disconnect The Battery

Make sure your ignition is off before you disconnect the battery cable using a socket wrench. Remove the lock tab from the harness connector from the ABS controller and subsequently disconnect it. Disconnect the pump motor connector from the end of the ABS controller as well.

Step 3 – Separate The ABS Units

Using a socket wrench, remove all of the screws that mount the ABS controller to the brake pressure valve and dispose of them. Gently pull the units apart and take note of the orientation of the wave springs before you remove them. The springs should be discarded as well.

Step 4 – Install New Springs

Use denatured alcohol to clean the gasket surface of the modulator valve. Once it has dried, install the new wave springs in the exact location that you removed the old ones from.

Step 5 – Install Mounting Screws

Install the mounting screws in an X pattern on the top and use a torque wrench to tighten them. Install the mounting screws on the bottom and tighten them as well.

Step 6 – Connect The Units

Connect the pump motor connector and electrical harness to the bottom of the ABS controller and replace the lock tab by pushing it back in.

Step 7 – Reconnect The Battery Cable

Switch the ignition switch to the RUN position and reconnect the battery cable using a socket wrench.