Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Reexamination Certificate
2005-04-12
2005-04-12
Nguyen, Tan Q. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
C701S001000, C701S031000, C701S113000, C307S010100
Reexamination Certificate
active
06879892
ABSTRACT:
A timer IC is operated by power supplied from a standby power source so as to output a start-up signal for starting a microcomputer every time that the time period during which a non-operating state of the microcomputer continues reaches a predetermined value. When the start-up signal is supplied to a relay coil of a main relay from the timer IC, it enables power to be supplied to the microcomputer from an in-vehicle battery. When it is determined that the microcomputer is started by the timer IC, a part of a series of predetermined initial process steps is executed and process steps relating only to the failure diagnosis are executed. That is, in the above condition, execution of the control for turning on an engine check lamp and a monitor can be inhibited by interrupting output of signals to the microcomputer.
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Nguyen Tan Q.
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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