Technical Description (Comment)
WARNING: This page is about a different car, the 2017 Mitsubishi Lancer, 2016 Mitsubishi Lancer, and 2015 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
WCM determines that the abnormality is present, if the data abnormality is found when the ignition switch is turned ON and then EEPROM is written.