JPH05142101A - Failure diagnosis device for vehicle - Google Patents

Abstract

PURPOSE:To enable a failure diagnosis of a vehicle-mounted electronic control device to be made safely even in operation state and a plurality of vehicle terminal machines to be coped with simultaneously without being restricted by harness. CONSTITUTION:A title item is constituted of vehicle-mounted electronic control devices 3 which are connected to a plurality of sensors and actuators 4 and communicates data with these sensors and actuators 4, a terminal machine 6 which is connected to a plurality of vehicle-mounted electronic control devices 3, and a failure diagnosis device 1 for vehicle with a communication function for communicating with the terminal machine 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosis device for an electronic control unit for an automobile such as an electronically controlled fuel injection device.

[0002]

2. Description of the Related Art FIG. 3 shows an embodiment of a conventional vehicle failure diagnosis device. According to this, an automobile failure diagnosis device (hereinafter referred to as a tester) 1 is connected to a centralized connector 2 by a harness 5 for communication, information of an in-vehicle electronic control device 3, various sensors provided in the in-vehicle electronic control device 3, The information of the electric signal obtained from the actuator 4 is displayed on the display device 9 of the tester 1 by communicating via the harness 5.

To explain this in more detail, the communication line of each on-vehicle electronic control unit 3 is connected to the centralized connector 2, and the tester 1 is connected to this centralized connector 2 via the harness 5. An electrical command is sent from the tester 1 to the vehicle-mounted electronic control device 3, the vehicle-mounted electronic control device 3 returns the requested internal storage information to the tester 1, and the tester 1 takes in the returned internal storage information, It is converted into a digital code and displayed on the display device 9.

For example, when a certain vehicle-mounted sensor 4 fails, the vehicle-mounted electronic control unit 3 stores that the sensor 4 has an abnormality. This internal storage information is called by the tester 1 by the method described above and displayed on the display device 9 of the tester 1. The internal storage information of the vehicle-mounted electronic control device 3 and the information of the electrical signals obtained from the various sensors and actuators 4 provided in the vehicle-mounted electronic control device 3 by using such a method are used via the harness 5 in a wired communication procedure. Communication is performed and displayed on the display device 9 of the tester 1, and failure diagnosis is performed based on the information.

[0005]

Since the conventional automobile failure diagnosing device carries out the diagnosis in the above procedure,
The harness 5 limits the range of movement of the tester 1, and when information is obtained while the vehicle is running, it cannot be operated from outside the vehicle, making it difficult and dangerous to use the tester 1. Further, the harness 5 allowed the tester 1 and the vehicle to correspond only one-on-one.

The present invention has been made in order to solve the above-mentioned problems, and makes it possible to safely obtain information of an on-vehicle electronic control unit without being restricted by a harness and in a driving state. It is an object of the present invention to provide a failure diagnosis device for an automobile, which enables operation from outside the vehicle and obtains information of an on-vehicle electronic control device from at least one automobile.

[0007]

A vehicle failure diagnosis apparatus according to the present invention is connected to at least one vehicle-mounted electronic control unit and has at least one terminal equipped with communication means for communicating with the vehicle-mounted electronic control unit. And a vehicle failure diagnosis device having a communication function for communicating with the terminal device, both the terminal device and the vehicle failure diagnosis device are wireless communication means having a communication means having a wireless communication function. ..

[0008]

Since the vehicle failure diagnosis apparatus according to the present invention has the wireless communication function, it is possible to safely carry out the failure diagnosis of the on-vehicle electronic control unit even in a driving state without being restricted by the harness, and the terminals of a plurality of vehicles. Both can be dealt with at once.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a failure diagnosis device for automobiles, 3 is an on-vehicle electronic control device, 2 is a centralized connector where communication lines from various on-vehicle electronic control devices 3 are gathered, 4 is a sensor related to various on-vehicle electronic control devices 3. , Actuators 6 are connected to the centralized connector 2 of the vehicle body, and various in-vehicle electronic control devices 3 are connected.
Half-duplex communication with the tester 1, and the tester 1 is a terminal that communicates by a radio communication procedure using electromagnetic waves. Reference numeral 7 is an antenna of the terminal, 8 is an antenna of the tester 1, and 9 is a display device.

Next, the operation of the present invention will be described with reference to the flowchart of FIG. In step S1, the tester 1 requests the target internal storage information of the on-vehicle electronic control unit 3 from the terminal 6 by using a wireless communication procedure. Terminal 6
In step S11, when the communication request from the tester 1 is received, the internal storage information of the in-vehicle electronic control device 3 is requested to the in-vehicle electronic control device 3 using a wired communication procedure.

The on-vehicle electronic control unit 3 executes step S2.
1, the control information of the electric signals obtained from the various sensors and the actuator 4 is taken in, the arithmetic processing of the control information is performed in step S22, and the control is performed according to the result of the arithmetic processing in step S23.
At, the presence or absence of a communication request from the terminal 6 is checked. Usually, such a repetitive process of steps S21 to S24 is executed.

Now, in step S24, the terminal 6
When the communication request is received from the vehicle, the internal storage information of the vehicle-mounted electronic control unit 3 is transmitted to the terminal 6 using a wired communication procedure in step S25. The terminal 6 receives a reply from the vehicle-mounted electronic control unit 3, and returns the returned internal storage information to the tester 1 from step S14 using a wireless communication procedure. Then, in step S2, the tester 1 returns the in-vehicle electronic control device 3 that has been returned.
The internal storage information of is processed into a unit system to be actually used in step S3, and is displayed on the display device 9 in step S4.

In the above description, an electromagnetic wave is used as an example of the wireless communication means, but the electromagnetic communication is not necessarily an electromagnetic wave, and may be, for example, light communication or sound wave communication.

[0014]

As described above, according to the present invention, since the harness is not used, it is possible to safely perform the failure diagnosis of the on-vehicle electronic control unit even in the operating state without being restricted by the harness, and to operate it from the outside of the vehicle. It will be possible. Further, it is possible to correspond to a plurality of terminals, and it becomes possible to obtain the internal storage information of a plurality of vehicles at one time.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of an automobile failure diagnosis device according to the present invention.

FIG. 2 is a flow chart for explaining the operation of the embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional automobile failure diagnosis.

[Explanation of symbols]

 1 Tester (automobile failure diagnosis device) 2 Centralized connector 3 In-vehicle electronic control device 4 Various sensors and actuators 6 Terminal device 9 Display device

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[Procedure amendment]

[Submission date] June 15, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

A vehicle failure diagnosis apparatus according to the present invention is connected to at least one vehicle-mounted electronic control unit and has at least one terminal equipped with communication means for communicating with the vehicle-mounted electronic control unit. When, is composed of a motor vehicle fault diagnostic apparatus having a communication function of communicating with the terminal, the terminal and the fault diagnosis apparatus both for motor vehicles, e Bei a wireless communication function, those with the wireless communication means the communication means Is.

Claims (2)

[Claims] 1. An automobile equipped with at least one terminal, which is connected to at least one on-vehicle electronic control device and has a communication means for communicating with the on-vehicle electronic control device, and a communication function for communicating with this terminal device. A failure diagnosis device for a vehicle, comprising: a failure diagnosis device, wherein both the terminal and the failure diagnosis device for a vehicle have a wireless communication function and the communication means is a wireless communication means. 2. The vehicle failure diagnosis device according to claim 1, wherein the wireless communication means is an electromagnetic wave, an optical communication or a sound wave.