How to Replace an ABS Controller in a Subaru Outback

The Subaru Outback has an anti-lock braking system (ABS) that prevents the brakes from locking during an emergency stop. The ABS controller accomplishes this by reducing the braking force to any wheel that is rotating significantly more slowly than the others. You may need to replace the ABS controller if the ABS warning light comes on. However, it is not necessarily unsafe to drive your vehicle without an ABS.

Instructions

1

Determine which ABS controller your Subaru Outback will need. You'll want to be sure the new controller is compatible with your make and model of Outback. All versions of the Outback made after 1999 offer ABS. These vehicles use an ABS controller that is integrated into the hydraulic control unit.

2

Disconnect the negative battery cable with a socket wrench and remove the air intake assembly. Use an air gun to remove any water around the hydraulic control module.

3

Pull the lock for the electrical connector for the hydraulic control unit and disengage the electrical connector. Mark the brake lines for future reference and disconnect the brake lines from the hydraulic control unit with a socket wrench. Remove the hydraulic control unit from the engine compartment.

4

Connect the brake lines to their correct locations with a socket wrench using the marks you made earlier. Secure the wiring harness to the bracket with the cable clip and connect the electrical connector to the ABS controller.

5

Complete the installation by replacing the air intake assembly and connecting the negative battery cable with a socket wrench.