A control system for a disc brake adjuster mechanism includes a controller and an electric adjuster motor for operable connection to an adjuster mechanism for driving a friction lining towards and away from a disc brake rotor to maintain a predetermined running clearance between the brake rotor and the friction lining when a brake is not applied. The system further includes a brake displacement sensor, and the controller is programmed to determine the brake displacement at which a predetermined load on the friction lining is achieved due to the contact with the disc brake rotor. The predetermined load is determined from a parameter of the electric adjuster motor or adjuster mechanism. The system is programmed to measure the brake displacement during brake release.