Erase The Password
WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
The 4-digit password set by security function can be erased by the diagnosis mode. Perform the "UNLOCK" operation of the diagnosis mode. (Refer to DIAGNOSIS MODE < VEHICLES WITH RADIO AND CD PLAYER > < Vehicles with radio and CD player >, DIAGNOSIS MODE < VEHICLES WITH MMCS > < Vehicles with MMCS >.)