JPH02214241A - Fault diagnostic device - Google Patents

Fault diagnostic device

Info

Publication number
JPH02214241A
JPH02214241A JP8933789A JP3378989A JPH02214241A JP H02214241 A JPH02214241 A JP H02214241A JP 8933789 A JP8933789 A JP 8933789A JP 3378989 A JP3378989 A JP 3378989A JP H02214241 A JPH02214241 A JP H02214241A
Authority
JP
Japan
Prior art keywords
node
fault
bus
short
circuited
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8933789A
Other languages
Japanese (ja)
Other versions
JP2726300B2 (en
Inventor
Hiroo Morigami
Yuusaku Himono
Kei Inoue
Osamu Michihira
Toshimichi Tokunaga
Original Assignee
Furukawa Electric Co Ltd:The
Mazda Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd:The, Mazda Motor Corp filed Critical Furukawa Electric Co Ltd:The
Priority to JP1033789A priority Critical patent/JP2726300B2/en
Publication of JPH02214241A publication Critical patent/JPH02214241A/en
Application granted granted Critical
Publication of JP2726300B2 publication Critical patent/JP2726300B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To suitably diagnose the fault of a transmission function of each communication node or the fault of a multiplex transmission line by short- circuiting one signal line of a common transmission line to a reference level, using a signal line not short-circuited so as to decide whether or not the data transmission is implemented normally.
CONSTITUTION: When a point (a) on a bus 52 is short-circuited, since data transmission/reception is implemented by a node 2 via a bus 51, the system is apparently normal. In the case of applying fault diagnosis, the fault diagnosis function of the node 4 is started to start diagnosis. That is, when a relay 44 is energized by the instruction of a CPU 42, the bus 51 is short-circuited and the communication with the node 2 is disabled and even when a data is sent from the fault diagnostic device 4, the node 2 does not return any ACK signal. Thus, the occurrence of the fault in the system is detected. When only the node 2 does not return the ACK signal, it is discriminated that the fault exists in a branch line (point a) of the bus 52 reaching the node 2.
COPYRIGHT: (C)1990,JPO&Japio
JP1033789A 1989-02-15 1989-02-15 Fault diagnosis device Expired - Fee Related JP2726300B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1033789A JP2726300B2 (en) 1989-02-15 1989-02-15 Fault diagnosis device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1033789A JP2726300B2 (en) 1989-02-15 1989-02-15 Fault diagnosis device

Publications (2)

Publication Number Publication Date
JPH02214241A true JPH02214241A (en) 1990-08-27
JP2726300B2 JP2726300B2 (en) 1998-03-11

Family

ID=12396240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1033789A Expired - Fee Related JP2726300B2 (en) 1989-02-15 1989-02-15 Fault diagnosis device

Country Status (1)

Country Link
JP (1) JP2726300B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008131514A (en) * 2006-11-22 2008-06-05 Denso Corp Communication interference preventing device, node for communication system, communication system, fault diagnostic device for vehicle and on-board device
JP2012516118A (en) * 2009-01-23 2012-07-12 シリコン イメージ,インコーポレイテッド Interconnect failure test

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008131514A (en) * 2006-11-22 2008-06-05 Denso Corp Communication interference preventing device, node for communication system, communication system, fault diagnostic device for vehicle and on-board device
JP2012516118A (en) * 2009-01-23 2012-07-12 シリコン イメージ,インコーポレイテッド Interconnect failure test

Also Published As

Publication number Publication date
JP2726300B2 (en) 1998-03-11

Similar Documents

Publication Publication Date Title
JPH02214241A (en) Fault diagnostic device
JPH04306028A (en) Transmission/reception equipment
JPS5833330A (en) Checking system for cable transmission line
JPH01112851A (en) Data communication system
JPS63304744A (en) Fault diagnostic system
JPH04207652A (en) On-vehicle multiplex transmission system
JPH0241058A (en) Diagnostic device for data transmission system
JPH04132335A (en) Multiplex transmission system
JPH02240761A (en) Simultaneous communication answer system
JPH0495428A (en) Line diagnostic control system
JPH0366242A (en) Bus signal monitor circuit
JPH04355532A (en) Fault detection system in bus network
JPH03143036A (en) Bus open short-circuit detecting method for transmission system
JPS62144436A (en) Transmission line testing device
JPS63308437A (en) Line occupation prevention system
JPS62171344A (en) Occupation prevention system for modem circuit
JPS6038951A (en) Communication processing device
JPS6424534A (en) Drawing image communication system
JPS5549067A (en) Facsimile signal storage converter
JPS58109949A (en) Error information display system
JPH04213250A (en) Fault processing system for star type lan
JPH0454747A (en) Data transfer system
JPS6346034A (en) Self-diagnosing system for electronic equipment connected to communication line
JPH0196725A (en) Multi-window controller
JPH03245648A (en) Fault monitor system

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees