All of Toyota Motor's Japanese assembly plants were shut down for roughly a day last week due to a problem caused by some servers that handled component orders being down due to maintenance, the firm claimed.
The system halt followed an issue owing to insufficient disk space on some of the servers and was not triggered by a cyberattack, the world's largest automaker by sales said in a statement on Wednesday.
After the data was moved to a server with more space, the system was restored, according to Toyota.
The company reported that the problem emerged following routine server repair work and stated it would review its maintenance practices.
On Wednesday of last week, one day after the malfunction, Toyota resumed work at its assembly factories in its home market.
Similar issues with the backup function made it challenging for the business to undertake a switchover and forced a halt to production at its factories, it claimed.
Toyota claimed to have verified that cyberattacks were not to blame for the incident.
The corporation issued a statement saying, "We will review our maintenance procedures and strengthen our efforts to prevent a recurrence."
On August 29, Toyota's domestic manufacturing was put on hold due to a problem with the system that places orders for parts with the automaker's suppliers. The business restarted production the next day after moving the data to a server with more space, it claimed.