Vehicular controller
First Claim
1. A vehicular controller comprising:
- a first electronic control device and at least one additional electronic control device, each of said control devices being for exchanging information with others of said electronic control devices and for performing malfunction diagnosis with others of said electronic control devices, at least one of said electronic control devices additionally being for executing backup operations responsive to detection of a malfunction in one of said electronic control devices; and
a switch for selectively supplying electrical power to said additional electronic control devices in an actuated state and for terminating electrical power to said additional control devices in a deactuated state, said first electronic control device receiving electrical power even when said switch is in said deactuated state.
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Accused Products
Abstract
A vehicle is equipped with an engine control ECU, an anti-lock brake system control ECU, a transmission control ECU and a meter control ECU. Each ECU shares information with the others by communicating and by performing mutual malfunction diagnosis operations through communication; also, backup operations are performed. After the deactuation of the ignition switch, malfunction diagnosis operations are prohibited by prohibiting communication between the engine control ECU which is supplied with electric power and the other ECUs which are not supplied with electric power. After the deactuation of the ignition switch, when a predetermined time lapses after the actuation of the ignition switch from the state wherein the ECU is supplied with power, prohibition on communication with ECUs is released.
36 Citations
13 Claims
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1. A vehicular controller comprising:
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a first electronic control device and at least one additional electronic control device, each of said control devices being for exchanging information with others of said electronic control devices and for performing malfunction diagnosis with others of said electronic control devices, at least one of said electronic control devices additionally being for executing backup operations responsive to detection of a malfunction in one of said electronic control devices; and a switch for selectively supplying electrical power to said additional electronic control devices in an actuated state and for terminating electrical power to said additional control devices in a deactuated state, said first electronic control device receiving electrical power even when said switch is in said deactuated state. - View Dependent Claims (2, 3, 4)
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5. A vehicular controller comprising:
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a first electronic control device and at least one additional electronic control device, each of said control devices being for exchanging information with others of said electronic control devices and for performing malfunction diagnosis with others of said electronic control devices; and a switch for selectively supplying electrical power to said additional electronic control devices in an actuated state and for terminating electrical power to said additional control devices in a deactuated state, said first electronic control device receiving electrical power even when said switch is in said deactuated state. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification