Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Reexamination Certificate
2006-06-06
2006-06-06
Camby, Richard M. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
C701S036000, C701S070000, C701S082000
Reexamination Certificate
active
07058491
ABSTRACT:
Wheel speed sensors arranged at each of driving wheels and idler wheels detect rotational speeds of corresponding wheels. ECU includes a wheel speed calculating portion calculating wheel speeds of the driving wheels and the idler wheels based on the detected rotational speeds, and an abnormality detecting portion detecting abnormality of the wheel speed sensors based on the calculated wheel speeds. The abnormality detecting portion detects the abnormality of the wheel speed sensors based on: a first wheel speed that is at least one of the wheel speeds of the driving wheels and the idler wheels being substantially zero; at least one of the wheel speeds except for the first wheel speed being greater than a prescribed threshold value; and an average wheel speed of the idler wheels being greater than an average wheel speed of the driving wheels.
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Camby Richard M.
Toyota Jidosha & Kabushiki Kaisha
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