Steering system, abnormality determination method, and non-transitory storage medium

An abnormality determination method for a steering system, the steering system including:

• a first operation device including
• a first displacement mechanism configured to change a position of an operation member to be operated by a driver,
• a first electric drive source configured to operate the first displacement mechanism, and
• a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism;
• a second operation device including
• a second displacement mechanism different from the first displacement mechanism,
• a second electric drive source configured to operate the second displacement mechanism, and
• a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism;
• and
• a determiner,
• the abnormality determination method comprising determining, by the determiner, that the first operation device and the second operation device do not malfunction when the determiner determines that the first operation device has an abnormality based on first operation information related to operation of the first operation device, and that the second operation device has an abnormality based on second operation information related to operation of the second operation device.

A non-transitory storage medium storing instructions that are executable by one or more processors and that cause the one or more processors to perform functions comprising determining that a first operation device and a second operation device do not malfunction when determination is made that the first operation device has an abnormality based on first operation information related to operation of the first operation device, and that the second operation device has an abnormality based on second operation information related to operation of the second operation device,

• the first operation device including:
• a first displacement mechanism configured to change a position of an operation member to be operated by a driver;
• a first electric drive source configured to operate the first displacement mechanism;
• and
• a first detector configured to detect first positional information indicating the position of the operation member based on the first displacement mechanism,
• the second operation device including:
• a second displacement mechanism different from the first displacement mechanism;
• a second electric drive source configured to operate the second displacement mechanism;
• and
• a second detector configured to detect second positional information indicating the position of the operation member based on the second displacement mechanism.