Interactive diagnostic system for an automotive vehicle, and method

• US 5,214,582 A
• Filed: 01/30/1991
• Issued: 05/25/1993
• Est. Priority Date: 01/30/1991
• Status: Expired due to Term

• Current Assignee: Snap-On Tools Company LLC (Snap-On Incorporated)
• Original Assignee: Edge Diagnostic Systems
• Inventors: Gray, Moshe
• Primary Examiner(s): Black, Thomas G.
• Application Number:
  US07/647,774
• Time in Patent Office: 846 Days
• Field of Search: 364/42.03, 364/42.04, 364/431.11, 364/578, 364/551.01, 73/117.2, 73/117.3
• US Class Current: 701/33
• CPC Class Codes: G01R 31/005 Testing of electric installations on transport means
• CPC Class Codes: G01R 31/007 using microprocessors or computers
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005

Abstract

An interactive diagnostic system is disclosed herein for use with an automotive vehicle of the type including a network of sensors and actuators for independently sensing and actuating a number of different functions within the vehicle and an onboard computer for monitoring the sensors and controlling the operation of the actuators. This system provides the automotive service professional with all of the tools necessary to provide precision diagnostic testing on todays computer-controlled cars. This is accomplished by providing the system with means including an external computer for controlling operation of one or more specific actuators independent of the onboard computer and for simulating the operation of specific sensors independent of the actual operation of these latter sensors. At the same time, the electronic data entering and exiting the onboard computer including the actual data associated with the network of sensors and actuators can be continuously monitored and analyzed by the external computer. In this way, the automotive service professional is able to quickly and easily test and trouble shoot the performance of a vehicle'"'"'s onboard computer and engine electronics down to the component level including specifically its entire network of sensors and actuators.

Claims

1. For use in a diagnostic system for an automotive vehicle of the type having (i) network sensors and actuators for independently sensing and actuating a number of different functions within the vehicle (ii) an onboard computer for monitoring said sensors and controlling the operation of said actuators, and (iii) means for electrically connecting said onboard computer with said sensors and actuators, said connecting means including an auto-side connector having a series of auto-side plug-in terminals respectively connected with individual ones of said sensors and actuators and a computer-side connector disengageably connectable to said auto-side connector and having corresponding, complementary computer-side plug-in terminals connected to appropriate circuitry within the onboard computer, an arrangement for temporarily disconnecting a selected one or a combination of said auto-side terminals from corresponding computer-side terminals, whereby to temporarily disconnect a selected one or combination of specific sensors and/or actuators rom said outboard computer, said arrangement comprising:

(a) a plurality of electronic switching circuits including a first network of such circuits individually connected between individual auto-side an computer-side terminals and a second network of such circuits connectable between an external computer arrangement and either individual auto-side or computer-side terminals, each of said switching circuits being designed to operated between a closed condition and an open condition for connecting and disconnecting its associated auto-side and computer-side terminals to and from one another and for connecting and disconnecting the external computer arrangement to an associated auto-side or computer-side terminal, said networks of circuits being designed for use with a particular make and/or model of said automotive vehicle in which its auto-side and computer-side terminals are connected with particular sensors and actuators in accordance with a specific connection scheme which differs from a different make and/or model vehicle.

2. An interactive diagnostic system for an automotive vehicle of the type having (i) a network of sensors and actuators for independently sensing and actuating a number of different functions within the vehicle, (ii) an onboard computer for monitoring said sensors and controlling the operation of said actuators, and (iii) means for electrically connecting said onboard computer with said sensors and actuators, said connecting means including an auto-side connector having a series of auto-side plug-in terminals respectively connected with individual ones of said sensors and actuators and a computer-side connector disengageably connectable to said auto-side connector and having corresponding, complementary computer-side plug-in terminals connected to appropriate circuitry within the onboard computer, said diagnostic system comprising:

(a) first means for temporarily disconnecting a selected one or combination of said auto-side terminals from corresponding computer-side terminals, whereby to temporarily disconnect a selected one or combination of specific sensors and/or actuators form said onboard computer, said first means including a network of switching circuits individually connected between auto-side and computer-side terminals, each of said switching circuits being designed to operate independent of but simultaneously with the other circuits in any selected combination between a closed condition and an open condition for connecting and disconnecting its associated auto-side and computer-side terminals to and from one another;

(b) second means temporarily connectable with said one or combination of auto-side terminals when the latter are disconnected from their corresponding computer-die terminals for controlling the operation of said one or combination of specific actuators independent of said onboard computer; and

(c) third means temporarily connectable with said one or combination of computer-side terminals when the latter are disconnected from their corresponding auto-side terminals for simulating the operation of said one or combination of specific sensors independent of the actual operation of these latter sensors.

3. A system according to claim 2 wherein said second means includes an external computer arrangement separate from said onboard computer for controlling the operation of said one or combination of specific actuators independent of said onboard computer by generating specific information digitally, converting said digital information to analog signals and directing said analog signals to said one or combination of specific actuators through said one or combination of auto-side terminals.

4. A system according to claim 3 wherein said third means includes said external computer arrangement separate from said onboard computer for simulating the operation of said one or combination of specific sensors independent of the actual operation of these latter sensors by generating specific signals digitally from said external computer, converting said digital signals to analog information and directing said analog information to the appropriate circuitry within said onboard computer through said one or combination of computer-side terminals.

5. A system according to claim 4 wherein said network of switching circuits are electronic switching circuits and wherein each of said second and third means includes a network of electronic switching circuits individually connected between said external computer arrangement and individual auto-side or computer-side terminals, each of said switching circuits being designed to operate between a closed condition and an open condition for connecting and disconnecting the external computer arrangement to its associated auto-side or computer-side terminals.

6. A system according to claim 5 wherein the first mentioned network of switches forming part of said first means also serves as the network of switches forming part of said second and third means.

7. A system according to claim 5 wherein said computer arrangement includes means for operating said networks of electronic switching circuits individually or in selected combinations.

8. A system according to claim 4 wherein different vehicle makes and/or models compatible with said system may include different sensors and/or actuators, a different onboard computer and/or a different arrangement of auto-side and computer-side terminals, and wherein said external computer arrangement includes a data base for distinguishing between any of said differences in different vehicle makes and models.

9. A system according to claim 8 wherein said external computer arrangement includes a visual display for visually displaying information from said external computer arrangement.

10. A system according to claim 9 wherein said external computer arrangement includes a database for appropriately scaling visually displayed graphic data depending on the vehicle being diagnosed, and the electrical parameters of the sensor/actuator connected to the terminal pin or pins being acted upon.

11. A system according to claim 8 wherein said database includes performance information pertaining to specific sensors and actuators for particular vehicle makes and models.

12. A system according to claim 2 including means for continually monitoring in real time electronic data entering and/or exiting said onboard computer including actual data associated with said network of sensors and actuators.

13. A system according to claim 12 wherein said monitoring means includes an external computer arrangement separate from said onboard computer for analyzing said electronic data.

14. A system according to claim 13 wherein said computer includes means for storing said electronic data into memory, a data base having exemplary data associated with said network of sensors and actuators, and means for comparing the actual data stored in memory with said exemplary data.

15. A system according to claim 12 including an external computer arrangement separate from said onboard computer forming part of said second means, third means, and said monitoring means for

(a) controlling the operation of said one or more specific actuators independent of said onboard computer,

(b) simulating the operation of said one or more specific sensors independent of the actual operation of the latter sensors, and/or

(c) analyzing said electronic data.

16. A system according to claim 15 wherein said external computer arrangement includes means for causing said second, third, and monitoring means to automatically operate in a predetermined way to carry out different predetermined tests on said network of sensors and actuators.

17. A diagnostic system for an automotive vehicle of the type having (i) a network of sensors and actuators for independently sensing and actuating a number of different functions within the vehicle (ii) an onboard computer for monitoring said sensors and controlling the operation of said actuators, and (iii) means for electrically connecting said onboard computer with said sensors and actuators, said connecting means including an auto-side connector having a series of auto-side plug-in terminals respectively connected with individual ones of said sensors and actuators and a computer-side connector disengageably connectable to said auto-side connector and having corresponding, complementary computer-side plug-in terminals connected to appropriate circuitry within the onboard computer, said diagnostic system comprising:

(a) monitoring means including a network of individual circuits disengageably connectable with and between said auto-side and computer-side terminals for independently and substantially simultaneously monitoring in real time individual electronic data entering and exiting said onboard computer through said individual circuits the individual data being associated with the individual sensors and actuators making up said network of sensors and actuators, said monitoring means also include an external computer arrangement separate from said onboard computer for analyzing said electronic data.

18. A system according to claim 17 wherein said computer arrangement includes means for storing said electronic data into memory, a database having exemplary data associated with said network of sensors and actuators, and means for comparing the actual data stored in memory with said exemplary data.

19. A system according to claim 17 wherein different vehicle makes and/or models compatible with said system may include different sensors and/or actuators, different onboard computers and/or different arrangement of auto-side and computer-side terminals, and wherein said external computer arrangement includes a database for distinguishing between any of said differences in different vehicle makes and/or models.

20. The system according to claim 19 wherein said database includes performance information pertaining to specific sensors and actuators for particular vehicle makes and models.

21. The system according to claim 20 including:

(a) first means for selectively and temporarily disconnecting one or more of said auto-side terminals from corresponding computer-side terminals, whereby to selectively and temporarily disconnect one or more specific sensors and/or actuators from said onboard computer;

(b) second means temporarily connectable with said one or more specific auto-side terminals when the latter are disconnected from their corresponding computer-side terminals for controlling the operation of said one or more actuators independent of said onboard computer; and

(c) third means temporarily connectable with said one or more specific computer-side terminals when the latter are disconnected from their corresponding auto-side terminals for simulating the operation of said one or more specific sensors independent of the actual operation of these latter sensors.

22. A system according to claim 21 wherein said external computer arrangement forms part of said second and third means for controlling the operation of said one or more specific actuators independent of said onboard computer and for simulating the operation of said one or more specific sensors independent of the actual operation of these latter sensors.

23. A system according to claim 17 wherein said network of individual circuits is designed for use with a particular make and/or model of said automotive vehicle in which its auto-side and computer-side terminals are connected with particular sensors and actuators in accordance with a specific connection scheme which differs form a different make and/or model vehicle.

24. A system according to claim 23 wherein said monitoring means includes a second network of individual circuits disengageably connectable with and between said auto-side and computer-side terminals, said second network corresponding in function to said first-mentioned network of circuits but specifically for said different and/or model vehicle.

25. A method of diagnosing for an automotive vehicle of the type having (i) a network of sensors and actuators for independently sensing and actuating a number of different functions within the vehicle (ii) an onboard computer for monitoring said sensors and controlling the operation of said actuators, and (iii) means for electrically connecting said onboard computer with said sensors and actuators, said connecting means including an auto-side connector having a series of auto-side plug-in terminals respectively connected with individual ones of said sensors and actuators and a computer-side connector disengageably connectable to said auto-side connector and having corresponding, complementary computer-side plug-in terminals connected to appropriate circuitry within the onboard computer, said method comprising the steps of:

(a) using an arrangement of independently actuatable switches disengageably connected with said auto-side and computer-side terminals, (i) temporarily and simultaneously disconnecting selected ones of said auto-side terminals from corresponding computer-side terminals arrangement, and (iii) connections elected ones of the disconnected auto-side terminals to an external computer arrangement, and (iii) connecting selected others of the disconnected computer-side terminals to said computer arrangement, in order to selectively and temporarily disconnect one or more specific sensors and/or actuators from said onboard computer; and

(b) through said arrangement of switches, controlling the operation of said one or more specific disconnected actuators by said external computer arrangement through the selected, disconnected auto-side terminals, independent of said onboard computer and/or simulating operation of said one or more specific disconnected sensors by said external computer arrangement through the selected disconnected computer-side terminals, independent of the actual operation of those sensors.

26. A method according to claim 25 including the step of continuously monitoring in real time electronic data entering and/or exiting said onboard computer including actual data associated with said network of sensors and actuators through said arrangement of switches.

27. A method according to claim 26 wherein said external computer arrangement is used to control the operation of said specific actuators, to simulate the operation of said specific sensors, and to analyze the electronic data entering and/or exiting said onboard computer continuously monitored through said arrangement of switches.

28. A method according to claim 27 wherein different vehicle makes and/or models compatible with said method may include different sensors and/or actuators, different onboard computers and/or a different arrangement of auto-side and computer-side terminals, said method including the steps of providing a database in said external computer for distinguishing between any of said differences in said vehicle makes and/or models and for providing a different arrangement of switches for different vehicle makes and/or models.

29. A method according to claim 28 including the step of providing said external computer with a database including performance information pertaining to specific sensors and actuators for particular vehicle makes and/or models.

30. A diagnostic system for an automotive vehicle of the type having (i) network of sensors and actuators for independently sensing and actuating a number of different functions with the vehicle (ii) an onboard computer for monitoring said sensors and controlling the operation of said actuators, and (iii) means for electrically connecting said onboard computer with said sensors and actuators, said connecting means including an auto-side connector having a series of auto-side plug-in terminals respectively connected with individual ones of said sensors and actuators and a computer-side connector disengageably connectable to said auto-side connector and having corresponding, complementary computer-side plug-in terminals connected to appropriate circuitry within the onboard computer, said diagnostic system comprising:

(a) controlling, simulating and monitoring means for (i) controlling the operation of one or a combination of said actuators independent of said onboard computer, (ii) for simulating the operation of one or a combination of said sensors independent of the actual operation of the latter sensors, and/or (iii) for continuously monitoring in real time electronic data entering and exiting said onboard computer, which data is associated with one, all or selectable combinations of said network of sensors and actuators, said controlling, simulating and monitoring means also including an external computer arrangement separate from said onboard computer for analyzing said electronic data.

31. A system according to claim 30 wherein said network of individual circuits is designed for use with a particular make and/or model of said automotive vehicle in which its auto-side and computer-side terminals are connected with particular sensors and actuators in accordance with a specific connection scheme which differs from a different make and/or model vehicle.

32. A system according to claim 31 wherein said monitoring means includes a second network of individual circuits disengageably connectable with and between said auto-side and computer-side terminals, said second network corresponding in function to said first-mentioned network of circuits but specifically for said different make and/or model vehicle.