JPS55166401A - Fault detection device for vehicle control unit - Google Patents

Fault detection device for vehicle control unit

Info

Publication number
JPS55166401A
JPS55166401A JP7235079A JP7235079A JPS55166401A JP S55166401 A JPS55166401 A JP S55166401A JP 7235079 A JP7235079 A JP 7235079A JP 7235079 A JP7235079 A JP 7235079A JP S55166401 A JPS55166401 A JP S55166401A
Authority
JP
Japan
Prior art keywords
relay
fault detection
input
circuit
signal
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.)
Pending
Application number
JP7235079A
Other languages
Japanese (ja)
Inventor
Masahiro Yasunami
Makoto Nomi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7235079A priority Critical patent/JPS55166401A/en
Publication of JPS55166401A publication Critical patent/JPS55166401A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To permit the judgement whether any fault in an input-output section, or an arithmetic section is detected or not by containing a program for hardware fault detection in a microcomputer.
CONSTITUTION: Input information from each appliance in a vehicle is sent to an input circuit 1 and an arithmetic section 3 performs predetermined logical judgement by the signal and a signal is obtained from an output circuit 5. An output signal is fed back to the input circuit to compare with the input information. When two signals do not coincide with each other, a fault detection relay (FDR) is off and a relay SAR is on by a fault diagnostic circuit 8 to operate diagnostic relays CHOF1W CHON2. For example, when the relay CHOF1 is off, the faults in the arithmetic section system are indicated, and when the relay CHON1 is off, the faults in an input circuit group are indicated.
COPYRIGHT: (C)1980,JPO&Japio
JP7235079A 1979-06-11 1979-06-11 Fault detection device for vehicle control unit Pending JPS55166401A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7235079A JPS55166401A (en) 1979-06-11 1979-06-11 Fault detection device for vehicle control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7235079A JPS55166401A (en) 1979-06-11 1979-06-11 Fault detection device for vehicle control unit

Publications (1)

Publication Number Publication Date
JPS55166401A true JPS55166401A (en) 1980-12-25

Family

ID=13486762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7235079A Pending JPS55166401A (en) 1979-06-11 1979-06-11 Fault detection device for vehicle control unit

Country Status (1)

Country Link
JP (1) JPS55166401A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310238A (en) * 1976-07-16 1978-01-30 Mitsubishi Electric Corp Failure diagnostic unit for controlling input/output set

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310238A (en) * 1976-07-16 1978-01-30 Mitsubishi Electric Corp Failure diagnostic unit for controlling input/output set

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