Connect the negative battery cable.
CAUTION: The first disadvantage of performing this operation is that disconnecting the battery will erase all adaptive values in the electronic control module. To re-enter the appropriate adaptive values into the memory of the electronic control module, you need to start the cold engine and drive the car at different speeds and engine speeds for about 20-30 minutes. The engine should also be allowed to idle for about 10 minutes. The second disadvantage is that the radio system safety codes, clock settings and other values will be erased. They must be restored after connecting the battery. If possible, use a trouble code reader to erase the trouble codes.
(The article was taken from the website: mitsubishiman.ru)