2012 NISSAN LEAF Owners Manual

the power switch is placed in the OFF position
then back to the ON position.
The computer has a built-in diagnostic feature
that tests the system each time you start the EV
(Electric Vehicle) and move the vehicle forward
or in reverse at a slow speed. When the self-test
occurs, you may hear a “clunk” noise and/or feel
a pulsation in the brake pedal. This is normal and
is not an indication of a malfunction.

Incorrect tire pressure, including un-
der inflation, may adversely affect tire
life and vehicle handling.