JPH01313773A - Fault diagnosis supporting device for on-vehicle electronic device - Google Patents

Abstract

PURPOSE:To easily execute an objective fault diagnosis by calculating the data of a sensor and an actuator, etc., obtained by an electronic controller which have been received by a tester by a computer, and providing a CRT screen for bringing the data to image display and a printer. CONSTITUTION:An electronic controller 1 to which a sensor 4 has been connected and which has an actuator, etc., and a tester 2 having a storage device 8 are connected by a wiring 7, so that data can be transmitted and received mutually by using a serial transmission system. Subsequently, a host computer 9 which is provided with a CRT screen 11 for graphing and displaying the data, and to which a printer 12 has been connected is connected to the tester 2 through an RS-232C communication circuit 10. In such a way, analog data information of the sensor and the actuator, etc., obtained from the electronic controller 1 can be brought to image display on the CRT screen 11, and data information can be printed, therefore, an objective fault diagnosis can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a failure diagnosis support device for rationally performing failure diagnosis of various electronic devices installed in automobiles.

[Prior Art] Fig. 3 is a connection diagram for explaining a conventional fault diagnosis method. In the figure, 1 is an electronic control unit, 2 is a tester for fault diagnosis, and a display screen 3 and data It has a storage device. 4 is a sensor, which is connected to the electronic control unit l via wiring 5 and connector 6. Reference numeral 7 indicates wiring connecting the electronic control device 1 and the tester 2. 8 is a storage device of the tester 1.

As a method for performing failure diagnosis using the above-mentioned device, for example, the electronic control device 1 may transmit information obtained from the sensor 4 to the
Then, the tester 2 converts this information into a digital code, receives the data via the wiring 7, and generates a new digital code in the tester 2 based on the data stored in the storage device 8. and is displayed on screen 3.

[Problem to be solved by the invention]

Since the conventional fault diagnosis support device is configured as described above, the data is only displayed digitally on the screen 3. Therefore, it is difficult to see the temporal trends of the data and the correlation with other data. It was difficult to know at a glance.

This invention was made in order to solve the above-mentioned problems, and its purpose is to obtain an in-vehicle failure diagnosis support device that can display data information in graph form and also print out and display this information. do.

[Means to solve the problem]

A failure diagnosis support device according to the present invention is configured such that an electronic control unit having various sensors and actuators and a failure diagnosis tester having a storage device are wired so that data can be sent and received from each other using a serial transmission method. The tester is equipped with a host computer connected to the tester via a communication line, a CRT screen for displaying images of data, and a printer for printing data.

[For production]

In this invention, analog data information such as sensors and actuators obtained from an electronic control device is transmitted to a host computer via a failure diagnosis tester, and temporal changes in data and correlations between various types of data are displayed on a CRT screen. The above data information can also be printed out using a printer.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a connection diagram of a fault diagnosis support device for an on-vehicle electronic device according to the present invention, and since numerals 1 to 8 are the same as the device shown in FIG. 3, the same numerals are given and a description thereof will be omitted. 9 is a host combiator connected to the failure diagnosis tester 2 via an R3-232C communication line 10; 11 is a CRT screen provided in the computer 9, which displays received data in the form of a graph. 12 is a printer capable of printing the above data.

Next, the operation of the failure diagnosis support device configured as described above will be explained with reference to the flowchart shown in FIG. When the data request code is transmitted from the host computer 9 to the failure diagnosis tester 2 in step S1, the tester 2, which has received this signal in step S2, transmits the data request code to the electronic control unit 1 in step S3. Then, the electronic control unit 1 that received the signal in step S4 searches for the required data from the code received in step S5,
This data is returned to the tester 2 in step S6. Thus, the tester 2 that received the data in step S7
processes the data in step S8 and returns the data to the host computer 9 in step S9. Thereafter, the computer 9 that received the data in step S10 processes the data in step Sll, and then processes the data in step S1.
2, the keys on the CRT screen 11 are operated manually, the data is displayed as an image in step S13, and the data is displayed in a graph in step S14. - On the other hand, the data is output to the printer 12 in step S15, and the data is outputted to the printer 12 in step S15.
16, the data can be printed.

In the embodiment, the R3-232C communication line 10 was used to connect the host computer 9 and the failure diagnosis tester 2, but it is also possible to connect to a remote host computer using a telephone line modem. . Also, printer 1
2 can be replaced with an XY block to facilitate drawing.

〔Effect of the invention〕

As explained above, according to the present invention, data information of sensors, actuators, etc. obtained from an electronic control device can be
Since images can be displayed on the RT screen or data information can be printed using a printer, objective failure diagnosis can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is a connection diagram of an in-vehicle fault diagnosis support device according to an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operation, and Part 3 is a connection diagram of a conventional in-vehicle fault diagnosis device. . 1... Electronic control device, 2... Tester for fault diagnosis, 4
...Sensor, 8...Storage device, 9...Upper computer, 10...R3-232C communication line, 11...
・CRT screen, 12...Printer. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An electronic control unit with various sensors and actuators and a fault diagnosis tester with a storage device are wired so that they can send and receive data to each other using a serial transmission method, and connected to the tester via a communication line. What is claimed is: 1. A failure diagnosis support device for an in-vehicle electronic device, characterized in that it is equipped with a host computer, a CRT screen that displays data as an image, and a printer that can print out the data.