US4862371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fault diagnosis system for electronic devices on automobiles
Assignee: Mitsubishi Electric Corp
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Filing: 1987-08-13
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Granted: 1989-08-29
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Expires: 2007-08-13
Abstract
Abstract A fault diagnosis system for automotive electronic devices which are adapted to transmit their diagnosis data at different data transmission speeds peculiar thereto. The system has a memory device for storing transmission data concerning speeds of data transmission optimum for the respective electronic devices. The memory device also is capable of storing diagnosis data concerning the respective electronic devices. The diagnosis system also has a tester for reading, when connected selectively to one of the electronic devices, the data concerning the data transmission speed optimum for the selected electronic device from the memory device. The tester then forms a transmission reference clock reference signal on the basis of the read data. The tester is further adapted for exchanging data with the selected electronic device in accordance with the transmission reference clock signal and other stored data.
Inventors
- 👤 Hirotoshi Maekawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:09
CPC Classifications
B; B60; B60R; B60R16/00; G; G07; G07C; G07C5/00; G07C5/08; G07C5/0808; G01; G01R; G01R31/00; G01R31/005; G01R31/006; G01R31/007; G01R31/28; G06; G06F; G06F11/00; G06F11/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A fault diagnosis system for electronic devices on automobiles wherein respective electronic devices are adapted to transmit diagnosis data at different data transmission speeds peculiar thereto, the system comprising: memory means for storing transmission data concerning speeds of data transmission optimum for the respective electronic devices and for writably storing diagnosis data concerning the respective electronic devices; fault detecting means for reading, when connected selectively to one of said electronic devices, the transmission data concerning the data transmission speed optimum for the selected electronic device from said memory means; for forming a transmission reference clock signal; for exchanging data with said selected electronic device in accordance with said transmission reference clock signal and other stored data; and for storing diagnosis data received from the selected electronic device in the memory means; and a fault diagnosis connector connected between said fault detecting means and one of said electronic devices.
Claim 2
Dependent Claim
148 words
A fault diagnosis system for electronic devices on automobiles wherein respective electronic devices are adapted to transmit diagnosis data at different data transmission speeds peculiar thereto, the system comprising: memory means for storing transmission data concerning speeds of data transmission optimum for the respective electronic devices and for writably storing diagnosis data concerning the respective electronic devices; fault detecting means for reading, when connected selectively to one of said electronic devices, the transmission data concerning the data transmission speed optimum for the selected electronic device from said memory means; for forming a transmission reference clock signal; for exchanging data with said selected electronic device in accordance with said transmission reference clock signal and other stored data; and for storing diagnosis data received from the selected electronic device in the memory means; and a fault diagnosis connector connected between said fault detecting means and one of said electronic devices.
Claim 3
Dependent Claim
36 words
A fault diagnosis system according to claim 1 wherein said memory means further includes means for storing of data exchange between said electronic devices and said tester, items involving faults, and formulae for converting physical amounts.
Claim 4
Dependent Claim
16 words
A fault diagnosis system according to claim 1 wherein the memory means includes a memory device.
Claim 5
Dependent Claim
17 words
A fault diagnosis system according to claim 3 wherein the memory device includes a semiconductor memory device.
Claim 6
Dependent Claim
18 words
A fault diagnosis system according to claim 4 wherein the semiconductor memory device includes a random access memory.
Claim 7
Dependent Claim
16 words
A fault diagnosis system according to claim 1 wherein the fault detecting means includes a tester,
Claim 8
Dependent Claim
14 words
A fault diagnosis system according to claim 6 wherein the tester includes a microcomputer.
Claim 9
Dependent Claim
30 words
A fault diagnosis system according to claim 1 further comprising a transmission reference line connected from the selected electronic device through the fault diagnosis connector to the fault detecting means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-28 | 1993-02-27 | 1993-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-28 | 1997-02-27 | 1997-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-28 | 2001-02-27 | 2001-08-29 | $7700.00 | Window Closed / Lapsed |