Title:
電子制御装置、電子制御装置の接続状態の診断方法
Document Type and Number:
Japanese Patent JP6586240
Kind Code:
B2
Abstract:
Provided is an electronic control device capable of performing abnormality diagnosis of a digital input circuit without modifying the circuit configuration. Included are: an external connection terminal to which an external power supply is connected; a first capacitor having one end connected to the external connection terminal and the other end connected to circuit ground; a microcomputer having a D/I port which is an input/output port and to which a voltage of the external connection terminal is input; an RC filter provided between the D/I port and the first capacitor, the RC filter including a first resistor and a second capacitor; and a second resistor for dividing an output voltage of the D/I port together with the first resistor and applying the divided voltage to one end of the first capacitor, in which the microcomputer outputs a predetermined voltage from the D/I port and diagnoses a connection condition of the external connection terminal on the basis of a voltage input to the D/I port after the first capacitor is charged with the predetermined voltage.
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Inventors:
Masaki Aoyagi
Takao Fukuda
Atsushi Kokonoki
Takao Fukuda
Atsushi Kokonoki
Application Number:
JP2018536993A
Publication Date:
October 02, 2019
Filing Date:
July 07, 2017
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
G01R31/02
Domestic Patent References:
| JP8086824A | ||||
| JP2014041064A | ||||
| JP2002181867A | ||||
| JP2014106219A | ||||
| JP2008232978A |
Attorney, Agent or Firm:
Polaire Patent Business Corporation