My sister has an EF Wagon same as mine and has a problem when she unlocks the doors the smart lock system goes haywire and all the door locks go nuts and start locking and unlocking by themselves untill she closes all the doors. It will no longer unlock with the remote and will only unlock with the key?

Anyone got any ideas on the issue?

a door actuator is stuffed, not the smartlock.

my ef fairmont did this to and i cleaned the earth points in the engine bay and it has not missed a beat for the last 6 months.