Toyota Motor Corp. said Wednesday that operations at all 14 of its vehicle assembly plants in Japan have resumed after a system failure led to their suspension the previous day.

A malfunction on Monday in the system that processes orders for vehicle parts has been temporarily resolved by activating an interim system, Toyota said.

People head to work at Toyota Motor Corp.'s Motomachi plant in Toyota, Aichi Prefecture, in the early morning on Aug. 30, 2023. (Kyodo)

The world's largest automaker said it restarted production at 12 of the plants on Wednesday morning and the remaining two in the evening.

The suspension has also impacted some Toyota parts factories, as well as the group's truck manufacturer Hino Motors Ltd., whose plant in Ibaraki Prefecture halted production on Wednesday after the malfunction caused inventory shortages.

The Japanese company is continuing to investigate the cause of the problem, while denying the possibility of a cyberattack.

In March last year, Toyota shut all of its domestic plants after domestic supplier Kojima Industries Corp. suffered a system failure caused by a cyberattack.

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