Nissan LEAF 2023 Owners Manual
9.26.1.2. Self-test feature
The ABS includes electronic sensors, electric pumps, hydraulic solenoids and a computer. The computer has a built-in diagnostic feature that tests the system each time you push the power switch in the READY to drive position and move the vehicle at a low speed in forward or reverse. When the self-test occurs, you may hear a “clunk” noise and/or feel a pulsation in the brake pedal. This is normal and does not indicate a malfunction. If the computer senses a malfunction, it switches the ABS off and illuminates the ABS warning light on the instrument panel. The brake system then still operates normally, but without anti-lock assistance.
If the ABS warning light illuminates during the self-test or while driving, have the vehicle checked by a knowledgeable LEAF repairer such as a NISSAN certified electric vehicle dealer.