JPS55166401A - Fault detection device for vehicle control unit - Google Patents
Fault detection device for vehicle control unitInfo
- 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
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
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)
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 |
-
1979
- 1979-06-11 JP JP7235079A patent/JPS55166401A/en active Pending
Patent Citations (1)
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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