JPH09264819A - Fault diagnostic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable coping with two or more languages with an application program for a single language by discriminating a used language for each country, and staring the character string information of the identical meaning in each common address corresponding to each language. SOLUTION: In a ROM 41 of a select monitor A, the character string information of the identical meaning is, for each memory block, stored in a dictionary stored in each common address, while corresponding to three languages. Based on connection state of each switch terminal of a mode change switch, 38, or, key operation of a keyboard 32, a corresponding memory block among three languages is selected, and an address corresponding to the item currently specified is specified. Then, a character string information is read out of the correct address in the corresponding memory block, then converted into an image data, and then displayed an a display 30. Thus, just by selecting a memory block and specifying an address, display is made in the language that corresponds to a specified item.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosing device for reading out data in an electronic control unit mounted on a vehicle for diagnosing a failure. More specifically, the language displayed on the display of the failure diagnosing device is changed to another language. The present invention relates to a failure diagnosis device that can perform.

[0002]

2. Description of the Related Art Recently, control systems for vehicles such as automobiles have been complicatedly electronically controlled, and a failure diagnosis apparatus capable of easily reading data from an electronic control apparatus mounted on the vehicle is used for failure diagnosis. It is indispensable.

Examples of this type of failure diagnosis device include:
There is a portable failure diagnostic device which attaches importance to versatility disclosed in Japanese Patent Publication No. 7-76737 by the present applicant,
The failure diagnosis device is connected to the vehicle-mounted electronic control device, the diagnosis item is specified by a simple key operation from the keyboard of the failure diagnosis device, and the data corresponding to the diagnosis item is bidirectionally communicated to the vehicle-mounted electronic control device. The data can be read out and displayed on the display of the failure diagnosis device, and by confirming this data, the operator can easily check the control system of the vehicle.

That is, as detection signals from sensors and switches, input data in the electronic control unit, output data corresponding to a control amount for actuators such as injectors, or self-diagnosis data in the electronic control unit are read to obtain normal values. Investigate the defective part or the cause of the failure while comparing with, and make necessary repairs or adjustments.

As described above, since the worker proceeds with the diagnosis work while recognizing the information displayed on the display of the failure diagnosis device, the characters displayed on the display may be in the language used in daily life. It is preferable for smooth progress.

Therefore, generally, in order to make the character string displayed on the display correspond to the language of the country in which the failure diagnosis device is used, the application program is created for each different language even if it is the same program. There was a need.

[0007]

However, even though the contents of the application programs are substantially the same, creating a plurality of application programs due to the difference in the language used not only increases the production cost. However, it imposes a heavy burden on the application program creator. Further, since there is an application program for each language to be used, there are more types than necessary and inventory management becomes complicated.

In view of the above circumstances, the present invention does not need to create an application program for each language to be used, and an application program for one language can support two or more languages. An object of the present invention is to provide a failure diagnosis device that can reduce the number of man-hours for creating an application program, reduce the burden on the application program creator, and simplify inventory management.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 is connected to an electronic control unit mounted on a vehicle, and the data in the electronic control unit is read and the electronic control unit is controlled. In a failure diagnosis device for diagnosing a failure of a control system of a vehicle including a dictionary storage means for storing character string information having the same meaning at each common address for each memory block corresponding to at least a plurality of languages of each country, and use for each country A used language determination means for determining a language, a memory block selection means for selecting a memory block corresponding to a used language, an address designating means for designating an address corresponding to a designated item, and a designated item in the selected memory block. And display control means for reading the character string information from the address corresponding to and displaying it on the display.

According to a second aspect of the present invention, in the first aspect of the invention, the used language discriminating means discriminates which language is selected from the connection state in the connection circuit.

That is, the failure diagnosis apparatus according to claim 1 determines a language to be used for each country, and stores a dictionary having the same meaning character string information stored in each common address for each memory block in correspondence with each language. From the means, a memory block corresponding to the language used is selected, an address is specified corresponding to the specified item, and character string information is read from the address corresponding to the specified item in the selected memory block and displayed on the display. . In this case, in determining which country-specific language is selected, the method according to claim 2
As described in, the determination is made from the connection state in the connection circuit.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 7, reference numeral A is connected to an electronic control unit C mounted on a vehicle B such as an automobile, and various data including input / output data in the electronic control unit C is read out by bidirectional communication to perform the electronic control. A portable fault diagnosis device (hereinafter, referred to as
"Select monitor"). This select monitor A
Has a general-purpose interface that can be connected to various in-vehicle electronic control units, regardless of vehicle type or completed vehicle manufacturer, and has a measurement function for measuring voltage, resistance, pulse signals, etc. in addition to the base function for failure diagnosis. It has abundant expansion functions such as functions, wire communication, wireless communication, optical communication and other computer communication functions, and data memory expansion functions. Basically, various processing is selected by a hierarchical menu system. It is like this.

Therefore, the select monitor A has a display 30 composed of a liquid crystal display with a backlight, an indicator section 31 composed of a plurality of LEDs and the like, and "S" (diagonal lines) arranged vertically and horizontally on the front surface. Shift), "C" (selection), "Y" (yes), "N" (no) keys, "←", "→", "↑", "for moving the cursor vertically and horizontally. ↓ ”direction keys, and
A keyboard 32 whose function can be changed according to the application is provided based on the function keys F1 to F4 in the lower row, and a memory cassette 50 described later is detachably attached to the side.

When the data in the electronic control unit C mounted on the vehicle B is read out to perform the failure diagnosis, the diagnostic connector 33 provided on the select monitor A is connected to the diagnostic cable 34 via the diagnostic cable 34, as shown in FIG. It is connected to the external connection connector 2a of the electronic control unit C, a power switch (not shown) on the side of the select monitor A is turned on, and a desired item is selected from the menu displayed on the display 30 by the keyboard 32. The failure diagnosis of each part can be easily performed by selecting.

On the other hand, the electronic control unit C mounted on the vehicle B includes those related to power train control such as an engine and an automatic transmission, those related to body control such as an air conditioner and various information systems, suspensions and auto cruises. In the present embodiment, an example in which an engine control unit (ECU) 2 that controls the engine is a failure diagnosis target will be described.

As shown in FIG. 8, the ECU 2 includes a CPU 3 as a main arithmetic unit, a ROM 4 in which fixed data such as an engine control program and various maps is stored.
RAM 5 in which data after processing output signals of various sensors and switches and data processed by calculation are stored, input interface 6 for inputting signals from various sensors and switches, and control signals for various actuators are output. The output interface 7 is mainly composed of a microcomputer connected to each other via a bus line, a constant voltage circuit 8 for supplying a constant voltage to each section, and a drive circuit for driving actuators by a signal from the output interface 7. 9 and other peripheral circuits are built in.

As the data input through the input interface 6, the cooling water temperature signal detected by the cooling water temperature sensor 10, the lean / rich signal of the air-fuel ratio detected by the O2 sensor 11, and the intake air amount sensor 12 are measured. Intake air amount signal, air conditioner switch 13 ON / OFF signal,
Vehicle speed signal detected by vehicle speed sensor 14, ON / OFF signal of idle switch 15, throttle opening signal detected by throttle opening sensor 16, neutral switch 1
7 is an ON / OFF signal, an engine speed signal detected by the engine speed sensor 18, etc., and each input data of these is processed by the CPU 3 and temporarily stored in the RAM 5 to be used for calculation of a control amount and the like. It That is,
The CPU 3 calculates various control amounts such as the fuel injection pulse width and the ignition timing based on the respective data stored in the RAM 5, and outputs a control signal corresponding to the control amount from the output interface 7 to the drive circuit 9 To a predetermined timing.

The drive circuit 9 includes a canister controller 19 for controlling a canister purge amount, an EGR actuator 20 for controlling an EGR amount, an idle control actuator 21 for controlling an idle speed, and an ignition for applying a high voltage to an ignition plug. The coil 22, the injector 23, etc. are connected and driven by the control signal from the output interface 7, and the engine is controlled to an optimum state for each operating region.

Further, the drive circuit 9 is provided with the ROM when an abnormality in the system is detected by the self-diagnosis function.
A self-diagnosis lamp 2 for displaying a trouble code corresponding to the faulty part read out from No. 4 by, for example, appropriately lighting a plurality of lamps or blinking a predetermined number of times.
4 are connected.

It should be noted that a part of the RAM 5 is a backup RAM that retains data by being supplied with power from the battery VB through the constant voltage circuit 8 even after the system power is turned off. Learning value by control,
A trouble code or the like corresponding to the failed part detected by the self-diagnosis function is stored.

Next, the structure of the select monitor A will be described. The select monitor A is installed in a dealer service factory or the like, and is internally provided with a main control unit 35 including a microcomputer, a power supply circuit 36 that supplies a constant voltage to each unit, and the like. Further, a removable memory cassette 50 is connected to the main controller 35 via a cassette connector 37 so as to be externally replaceable.

The power supply circuit 36 supplies power from the battery VB of the vehicle B via a cigarette lighter cable, from a general AC power supply via an AC / DC adapter, or by incorporating a battery. It is compatible with so-called 3 power sources.

The main control unit 35 includes a CPU 40 which is a main processing unit, a system boot program, data of menus and various messages displayed on the display 30,
And a ROM 41 that stores a dictionary and the like, a RAM 42 that includes a work RAM that stores work data and a video RAM that is a video memory, a diagnosis interface 43 that is a connection interface with the electronic control unit C mounted on the vehicle B, and an indicator unit 31. The LED is turned on (or blinks), the input / display interface 44 for processing a key operation signal from the keyboard 32, and the ROM 51 provided in the memory cassette 50 are connected via a bus line. Explaining the dictionary stored in the ROM 41, as shown in FIG. 4, it has a plurality of memory blocks, and each memory block has character string information corresponding to each language (three languages in this embodiment) (see FIG. 2).
(For convenience, the image information is shown) is stored.
Character string information having the same meaning is stored in each common address. That is, as shown in the figure, the memory block 0 corresponds to the Japanese mode, the memory block 1 corresponds to the English mode, the memory block 2 corresponds to the German mode ...
At each common address, for example, at address $ 001, "battery voltage" is used in memory block 0, "Battery Voltage" is used in memory block 1, and "Batteri voltage" is used in memory block 2.
Character string information having the same meaning and commonly defined, such as "spannung", is stored.

The selection of the language for each country is a fixed mode which is automatically selected and executed when the power is supplied to the select monitor A, and a selection which can be changed by software after the power is supplied to the select monitor A. There are modes. In the fixed mode, as shown in FIG. 8, a mode selection switch 38 as an example of a connection circuit provided in the select monitor A is provided.
The language to be used is identified based on the connection state by. The mode selection switch 38 is provided with switch terminals corresponding to the memory blocks forming the dictionary. One end of each switch terminal is connected in parallel to the input port of the input / display interface 44, and the other end is connected. It is grounded. A constant voltage Vcc is applied between the switch terminal and the input port of the input / display interface 44. Therefore, when a certain switch terminal is short-circuited, the voltage for the input port connected to the switch terminal becomes L level, the voltage for the input port connected to the other switch terminal becomes H level, and the L level voltage is applied. The language used is selected when the power is turned on by identifying the input port.

Further, the diagnostic interface 43 is
FPGA (Field Programmable G) whose on-board logic functions can be reprogrammed by giving design information
ateArray), and this FPGA provides an I / O interface that can be connected to various in-vehicle electronic control devices C, and a communication protocol of various in-vehicle electronic control devices C, regardless of vehicle type or completed vehicle manufacturer. It is possible to realize suitable serial communication interface hardware.

The memory cassette 50 allows the select monitor A to be used universally in response to different diagnostic items, different vehicle types, and different communication protocols. The diagnostic processing program corresponding to the above and design data including logic information for reprogramming the FPGA so as to be compatible with the communication protocol of the in-vehicle electronic control unit C are stored, and the ROM 41 is also provided if necessary. An additional dictionary or the like for interpolating the dictionary stored in is stored.

At the time of failure diagnosis, in order to reprogram the diagnostic processing program corresponding to the on-vehicle electronic control unit C (the ECU 2 whose engine is the control target in this embodiment) and the FPGA of the diagnostic interface 43. The memory cassette 50 storing the design data and the like is installed, the design data of the FPGA stored in the ROM 51 is transferred to the diagnostic interface 43 together with the initialization of the select monitor A, and the FPGA is reprogrammed to be mounted on the electronic vehicle. The I / O connection and serial communication with the control device C are made possible.

The design data of the FPGA constituting the diagnostic interface 43 is not necessarily limited to that stored in the ROM 51 in the memory cassette 50. For example, the boot program of the CPU 40 may be changed to change the external computer. The FPGA design data may be loaded from.

Here, the selection of the language to be used for each country, that is, the language selected from Japanese, English, or German is determined to select the language to be used, and the diagnostic items are also dealt with. In order to display the character string information on the display 30 in the corresponding language, the select monitor A has the functions of the dictionary storage means, the used language discrimination means, the memory block selection means, the address designation means, and the display control means according to the present invention. ing.

The language selection on the select monitor A and the processing relating to the display on the display 30 will be described below with reference to the flowcharts of FIGS.

First, the memory cassette 50 suitable for the ECU 2 of the vehicle B to be diagnosed is attached to the select monitor body, the select monitor A is connected to the ECU 2 via the diagnostic cable 34, and the power switch is turned on. The CPU 40 that controls A is reset, and the processing shown in FIG. 2 starts.

In this process, first, in step S1, system initialization such as clearing flags and setting a function mode for each key of the keyboard 32 is performed. Then, in steps S2 to S7, a fixed language for automatically setting a language to be used is fixed. The mode is executed. First, in step S2, the voltage level input to the input port of the input / display interface 44 connected to each switch terminal in the mode selection switch 38 is read, and in steps S3 and S4, each of the input ports is read. Check whether the Japanese mode or English mode is set based on the applied voltage level. For example, when the uppermost switch terminal of the mode selection switch 38 shown in FIG. 8 is ON and the other switch terminals are OFF, the Japanese mode is selected, the intermediate switch terminal is ON and the other switch terminals are OF.
When F is selected, the English mode is selected, and when the conditions other than the above switch terminal connection conditions are set to the German mode, a German mode is preset, and the corresponding language is selected according to the switch terminal state. The connection state of each of these switch terminals is set in advance when the select monitor A is shipped, but it is also possible to switch the connection state of each switch terminal after shipping.

Then, when the Japanese mode is selected, the process proceeds to step S5, and the memory block 0 for storing the Japanese character string code is selected from the memory blocks forming the dictionary, and when the English mode is selected, the step S6 is performed. Go to
If the memory block 1 storing the English character string code is selected, and further, neither the Japanese mode nor the English mode is selected, the process proceeds to step S7, and the memory block 2 storing the German character string code is selected. Go to step S8. As a result, when power is supplied to the select monitor A,
The language used is automatically specified.

Next, in steps S8 to S13, after the power supply to the select monitor A is turned on, a selection mode in which the language used can be changed by software is executed. First, in step S8, it is checked by a key operation input of the keyboard 32 whether or not there is a request for changing the language used by the operator. If there is no request for changing the language, the process jumps to step S14. If so, step S9
Proceed to. In the present embodiment, the request to change the language used is determined by whether or not the F1 key of the keyboard 32 has been pressed, and F1
When the key is pressed, the process proceeds to step S9 and step S9.
In 9 and S10, it is checked whether it is a Japanese mode request or an English mode request. The mode of the used language is switched endlessly, for example, every time the F1 key is pressed, Japanese mode → English mode → German mode → Japanese mode. That is, the F1 key of the keyboard 32 is assigned as a key for changing the language mode, and each time the F1 key is pressed, the language used is sequentially changed.

If the Japanese mode is selected in step S9, the process proceeds to step S11 to select the memory block 0 for storing the Japanese character string code among the memory blocks forming the dictionary, and the English mode in step S10. If it is selected, the process proceeds to step S12, and the memory block 1 that stores the English character string code is selected from the memory blocks that make up the dictionary. If the mode is neither Japanese mode nor English mode, the process proceeds to step S13. , Select memory block 2 to store the German string code,
It proceeds to step S14.

The languages used are not limited to Japanese, English, and German, but four or more languages such as French may be selected.

Then, in step S14, a normal program for failure diagnosis and the like is executed, and when the program ends, the process returns to step S8.

The processing such as the failure diagnosis executed in the above step S14 is a hierarchical menu system, and the operator views the keyboard 32 while looking at the menu screen (see FIG. 5) displayed on the display 30. Key (“↑”
Use the “↓” key to move the cursor up and down, move the cursor to the desired menu and highlight it, and then press the Yes key (“Y” key) to confirm the selection and display the menu on the next floor. For the fault diagnosis, the diagnosis item is determined in the lowest menu, the data in the ECU 2 corresponding to the diagnosis item is read by bidirectional communication, the data value, and the data indicating what data is the data. The type, unit, etc. are displayed on the display 30.

Here, in order to display the menu, data type, unit, etc. in the selected language used (either Japanese, English, or German), in the step in the program relating to the above-mentioned failure diagnosis, A process of displaying an image of a character string corresponding to the item currently designated in the selected language mode on display 30 is executed. That is, as shown in FIG. 3, in step S21 of the subroutine executed in step S14,
When the designated item corresponds to the currently designated process item and the menu item is displayed, the address in which the character string information for displaying the corresponding menu screen is stored is designated by the memory table. At the time of displaying the read data value, the address at which the corresponding character string information for displaying the data type and unit is stored is specified.

Then, in step S22, the number (the number corresponding to 0 to 2) of the memory block selected in the fixed mode or the selection mode is stored in the register,
In the following step S23, the character string code (character string information) is read from the address designated in step S21 of the memory block of the corresponding number, and step S24
Then, the character string code is converted into image data, and step S
By transferring the image data to the video RAM at 25, the corresponding character of the selected language is displayed on the display 30.

As an example of the menu display, when the Japanese mode is selected, the menu of the display 30 is displayed in Japanese as shown in FIG. 5, and when the English mode is selected, the menu is displayed. As shown in 6, a menu having the same contents as the above menu is displayed in English. Similarly, when the German mode is selected, the above menu is displayed in German.

In the present embodiment, the ROM 41 of the select monitor A stores the character string information having the same meaning in the dictionary stored in each common address for each memory block corresponding to the three languages, and the mode changeover switch 38 is used. The corresponding memory block of the above three languages is selected by the connection state (ON, OFF state) of each switch terminal or the key operation of the keyboard 32, and the address corresponding to the currently designated item is designated. Then, the character string information is read from the corresponding address in the corresponding memory block, converted into image data, and displayed on the display 30. That is, since character string codes having the same meaning are stored corresponding to each national language at the same address of each memory block of the dictionary stored in the ROM 41,
The address specification is common, and it is possible to easily display in the language corresponding to the specified item by selecting the memory block and specifying the address, and create the application program for each language of each country. No need for one application program
At the same time, we can plan to support each language.

In the present embodiment, an example corresponding to three languages of Japanese, English and German has been described, but the present invention is not limited to this, and it is possible to use two languages or four or more languages. It applies even if there is.

When adding a dictionary function, a corresponding language, or character string information, the RO of the memory cassette 50 is added.
This is possible by storing an additional dictionary in M51.

[0046]

According to the invention described in claim 1, the dictionary storage in which the language used in each country is discriminated and the character string information having the same meaning is stored in each common address for each memory block corresponding to each language From the means, a memory block corresponding to the language used is selected, an address is specified corresponding to the specified item, and character string information is read from the address corresponding to the specified item in the selected memory block and displayed on the display. So 1 application program
It is possible to automatically display the character string corresponding to the language to be used in the failure diagnosis device by simply creating it in multiple languages, so there is no need to create as many application programs as there are languages. Not only can the number of production steps be reduced, but the burden on the application program creator is also reduced, and since it is not necessary to prepare the same application program for each different language, inventory management can be simplified, and even in different countries. On the other hand, it becomes possible to supply the application program early.

According to the second aspect of the invention, in addition to the above effect, which language is selected is determined from the connection state in the connection circuit, so that the connection state is set only once, and the language used every time. There is no need to select, and the usability is improved.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is a flowchart showing a failure diagnosis routine.

FIG. 3 is a flowchart showing a failure diagnosis subroutine.

FIG. 4 is an explanatory diagram of each memory block that constitutes a dictionary.

[Figure 5] Explanatory diagram showing the menu when the Japanese mode is selected

FIG. 6 is an explanatory diagram showing a menu when the English mode is selected.

FIG. 7 is an external view of a failure diagnosis device connected to an in-vehicle electronic control device.

FIG. 8 is a circuit block diagram of an on-vehicle electronic control device and a failure diagnosis device.

[Explanation of symbols]

 A ... Failure diagnosis device B ... Vehicle C ... Electronic control device 30 ... Display 38 ... Mode selection switch (wiring circuit) 41, 51 ... ROM (dictionary storage means)

Claims (2)

[Claims] 1. A failure diagnosis device which is connected to an electronic control device mounted on a vehicle, reads data in the electronic control device, and performs a failure diagnosis of a control system of the vehicle including the electronic control device, having the same meaning. A dictionary storage means for storing character string information at each common address for each memory block corresponding to at least a plurality of national languages, a used language determination means for determining a used language for each country, and a memory block corresponding to the used language are provided. Memory block selecting means for selecting, address designating means for designating an address corresponding to a designated item, and display control means for reading out character string information from the address corresponding to the designated item in the selected memory block and displaying it on a display. A failure diagnosis device comprising: 2. The failure diagnosis device according to claim 1, wherein the language used determining means determines which language is selected from the connection state in the connection circuit.