In-vehicle reporting apparatus and reporting system

An in-vehicle reporting apparatus that includes an air pressure information acquisition unit configured to acquire identification information identifying each of a plurality of tires provided on a vehicle and air pressure information related to an air pressure of each of the plurality of tires, and that performs reporting that depends on the identification information and the air pressure information acquired by the air pressure information acquisition unit, comprising:

• a storage unit configured to store a mounting position of each of the plurality of tires in association with the identification information identifying the tire;
• a vehicle height acquisition unit configured to acquire a vehicle height of the vehicle;
• a vehicle height determination unit configured to determine whether the vehicle height acquired by the vehicle height acquisition unit is greater than or equal to a predetermined height;
• an air pressure threshold determination unit configured to determine whether an air pressure indicated by the acquired air pressure information is less than or equal to a predetermined threshold;
• and
• a detection unit configured to report information that depends on the mounting position of a tire stored in the storage unit in association with the identification information acquired by the air pressure information acquisition unit and on the air pressure information of the tire acquired by the air pressure information acquisition unit, in a case where the vehicle height determination unit determines that the acquired vehicle height is not greater than or equal to the predetermined height, and to report a result of the determination by the air pressure threshold determination unit that depends on the air pressure information of the tire acquired by the air pressure information acquisition unit, without reporting at least information that depends on the mounting position of the tire, in a case where the vehicle height determination unit determines that the acquired vehicle height is greater than or equal to the predetermined height.