Probable Causes

WARNING: This page is about a different car, the 2022 Mitsubishi Mirage. However, it is still accessible from the selected car via links, so may be relevant.

ETACS-ECU malfunction
The ASC-ECU, which was used on another vehicle, is installed on this vehicle.
The hydraulic unit (integrated with ASC-ECU), which was used on another vehicle, is installed on this vehicle.
Malfunction of the hydraulic unit (integrated with ASC-ECU).
Noise interference