How to replace ABS Computer Module

Helpful Information

The ABS controller in a car is responsible for limiting the brake line pressure to allow the tire or tires to start rotating when locked up to maintain an equal spin rate. If the controller fails or malfunctions it can cause the ABS system to stop working and illuminate the ABS warning light. Most ABS diagnostic systems can be access by the ALDL connector much like the body or engine control system. Using a trouble code reader with the capability to read such codes can be connected with the ignition key in the "ON" position. Once a trouble code that confirms the controller failure.

Tools and Supplies Needed

Replacement ABS computer control module
Socket set including torx
Screw driver set
Shop towels
Protective eyewear and gloves

Common Problems

When the ABS module fails it will illuminate the ABS warning light.
If the vehicle is equipped with traction control it uses a different ABS computer which are not interchangeable with non-traction controlled vehicles.

Best Practices

Always use quality ABS replacement parts

Easy step by step replacement guide for changing an automotive ABS computer control module, configuration may vary but follow the same steps, this article pertains to many ABS brake system vehicles.

Difficulty Scale: 4 of 10

Begin place car on level ground with the emergency brake set, remove the battery cable from the negative side of the battery.

Step 1 - Locate and identify the ABS brake computer module which is usually under the hood or mounted to the frame rail under the vehicle, disconnect all electrical connectors.