JP2006044550A - Diagnostic device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnostic device for a vehicle excellent in reliability, capable of carrying out the minimum failure diagnostic treatment for a diagnostic objective device in accordance with information memorized in a second memory device even when a first memory device fails and capable of carrying out further detailed failure diagnostic treatment by using information memorized in the first memory device. <P>SOLUTION: This diagnostic device for the vehicle to diagnose failure of the diagnostic objective device in accordance with information for diagnosis including hysteresis information in operation of the diagnostic objective device concerning the diagnostic objective device loaded on the vehicle and to be diagnosed of its failure is furnished with the first memory means to memorize the information for diagnosis, a diagnosing means to output a diagnostic result about the failure of the diagnostic objective device by arithmetically data to be a base of diagnosis accumulated in the first memory device and the second memory device to memorize the diagnostic result to be output from the diagnosing means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle diagnostic apparatus for diagnosing the operating state of a diagnostic target device provided in a vehicle having a navigation device.

  As the vehicle travels, the current position is detected by GPS (Global Positioning System), etc., and the current position is displayed on the display device together with the road map, and an appropriate route from the current position to the destination is displayed. A vehicle navigation device that guides the vehicle with a display device, a voice output device, or the like contributes to efficient and safe driving for the driver.

  As a vehicle diagnostic device that accumulates vehicle history information in a storage device of a navigation device for vehicle failure diagnosis, for example, a hard disk device capable of accumulating a large amount of vehicle history information with low cost and large capacity is used. (See Patent Document 1).

JP 2004-009878 A

  However, the hard disk device in the example of Patent Document 1 has a problem that the reliability is lower than that of a semiconductor storage device such as a flash ROM or a RAM. In other words, if the hard disk device breaks down, the accumulated vehicle history information cannot be read, so when a failure occurs in the navigation device, the cause of the failure cannot be identified, and it takes time to investigate the cause. There is also a problem that parts that do not need repair and replacement are replaced, and the user cannot use the navigation device during the repair period, and the repair cost increases.

  Against the background of the above problems, an object of the present invention is to provide a vehicle diagnostic apparatus excellent in reliability.

Means for Solving the Problems and Effects of the Invention

  The present invention provides a vehicle diagnostic apparatus for solving the above-described problems. In other words, according to the first aspect, for a diagnosis target device that is to be diagnosed for a failure mounted on a vehicle, the failure of the diagnosis target device is diagnosed based on diagnostic information including history information in operation of the diagnosis target device. In the vehicle diagnostic device, the first storage means for storing the diagnostic information and the data that is the basis of the diagnosis stored in the first storage device are arithmetically processed to obtain a diagnosis result about the failure of the diagnostic target device And a second storage means for storing the diagnosis result output from the diagnosis means. The vehicle diagnosis apparatus is characterized by comprising:

  With the above configuration, even if the first storage device fails, it is possible to perform the minimum failure diagnosis process for the diagnosis target device based on the information stored in the second storage device. If the information stored in the first storage device is used, more detailed failure diagnosis processing can be performed.

  According to the second aspect, the first storage device in the vehicle diagnostic apparatus of the present invention can be configured to include a hard disk device, and the second storage device can be configured to include a semiconductor storage device. This configuration stores vehicle history information in an inexpensive and large-capacity hard disk device, and also stores part of information in a semiconductor storage device such as a flash ROM or RAM that is expensive but excellent in reliability. Thus, a vehicle diagnostic apparatus having excellent reliability is provided. With the above configuration, by storing highly important information in the semiconductor storage device, it is possible to perform a minimum failure diagnosis process for the diagnosis target device even if the hard disk device fails.

  According to the third aspect of the present invention, in the vehicle diagnostic device of the present invention, the storage device of the vehicle navigation device that displays the current position of the vehicle on the electronic map and assists the vehicle travel is used as the storage device of the vehicle diagnostic device. In addition, the storage device of the vehicle navigation device can take a configuration including a first storage device and a second storage device.

  The vehicular navigation device increases the amount of information to provide the user with detailed map information and facility guidance information, and cannot be accommodated by a single CD-ROM or DVD that can be stored. In addition, the vehicle navigation device is integrated with the conventional audio / video device mounted on the vehicle, and includes functions as not only a route guidance device but also an information providing device and an entertainment device. The amount of information required to do this is enormous. Therefore, in order to solve the problem of increase in storage capacity, vehicle navigation devices equipped with a hard disk device have become widespread. With the above configuration, if the storage device for the vehicle navigation device is used, no dedicated storage device is provided, so that the vehicle diagnostic device of the present invention can be realized at low cost.

  According to claim 4, the first storage device in the vehicle diagnostic apparatus of the present invention stores the data before the arithmetic processing and the intermediate data generated in the arithmetic processing process, which are the basis of the diagnosis by the diagnostic means, The storage device 2 can be configured to store calculation result data output by the diagnosis unit from data before calculation processing and intermediate data at the time of calculation processing. With this configuration, even if the first storage device fails, it is possible to perform a minimum failure diagnosis process on the diagnosis target device based on the information stored in the second storage device. If the information stored in the first storage device is used, more detailed failure diagnosis processing can be performed.

  According to the fifth aspect, the first storage device in the vehicle diagnostic device of the present invention stores communication data between the diagnosis target device and another device, and the second storage device diagnoses from the communication data. A configuration for storing data on the presence or absence of a communication error diagnosed by the means can be employed.

  In the case of inter-device communication in a vehicle, the actual communication data is enormous, so it is stored in a large-capacity hard disk device, and the size of the communication error presence / absence information, which is the result of analyzing the communication data, is small. The data is stored in a semiconductor memory device such as a RAM. When a failure related to communication occurs, if the cause is relatively simple, the cause can be identified only by the communication error presence / absence information stored in a semiconductor storage device such as a flash ROM or RAM. Thus, even when actual communication data cannot be read, the cause can be investigated. Also, if the cause is complicated, it is difficult to investigate the cause if there is no data in the hard disk device, but a failure actually occurred due to communication error presence / absence information stored in a semiconductor storage device such as a flash ROM or RAM. This makes it possible to determine whether or not a normal product is erroneously exchanged.

  According to the sixth aspect of the present invention, the vehicle diagnostic apparatus of the present invention includes position information collecting means for collecting data serving as a basis for detecting the current position of the vehicle, and the current position of the vehicle based on the collected data. Coordinate calculation means for calculating coordinates can be provided, the first storage device can store the collected data, and the second storage means can store the calculated coordinates of the current position. With this configuration, even if the first storage device fails, it is possible to perform a minimum failure diagnosis process on the diagnosis target device based on the coordinate information of the current position stored in the second storage device. If the information stored in the first storage device is used, data that is the basis of the calculation of the current position is also included, so that more detailed failure diagnosis processing can be performed.

  According to the seventh aspect of the present invention, the vehicle diagnostic apparatus of the present invention includes position information collection means for collecting data serving as a basis for detecting the current position of the vehicle, and the current position of the vehicle based on the collected data. The first storage device stores the collected data and intermediate data generated at the time of calculation by the coordinate calculation means, and the second storage means calculates the coordinates of the calculated current position. Can be stored. With this configuration, even if the first storage device fails, it is possible to perform a minimum failure diagnosis process on the diagnosis target device based on the coordinate information of the current position stored in the second storage device. If the information stored in the first storage device is used, it is possible to perform more detailed failure diagnosis processing because data that is the basis for the calculation of the coordinates of the current position and intermediate data generated during the calculation are also included. .

  The object of providing a vehicular diagnostic apparatus with excellent reliability is realized by a vehicular diagnostic apparatus that uses a hard disk device and a semiconductor storage device of a vehicular navigation apparatus as a storage device.

  Hereinafter, a vehicle diagnostic apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an overall configuration diagram. An audio device 41, an air conditioner device 43, and an engine control computer 45 to be diagnosed are connected to a vehicle navigation device 100 to which the vehicle diagnostic device is applied via an in-vehicle LAN (Local Area Network). The device to be diagnosed may be other than the above devices.

  FIG. 2 is a block diagram showing an overall configuration of a vehicle navigation apparatus (hereinafter abbreviated as a navigation apparatus) 100. The navigation device 100 includes a position detector 1, an external information input / output device 6, an operation switch group 7, a remote control (hereinafter referred to as remote control) sensor 11, a speaker 15 for voice guidance, a semiconductor memory device 9, a display device 10, These control circuit 8, remote control terminal 12, and hard disk device 21 (first storage device of the present invention, hereinafter abbreviated as HDD) are provided.

  A position detector 1 (position information collecting means of the present invention) includes a known geomagnetic sensor 2, a gyroscope 3, a distance sensor 4, and a GPS receiver for GPS that detects the position of a vehicle based on radio waves from a satellite. 5 Since these sensors 2, 3, 4, and 5 have errors of different properties, they are configured to be used while being complemented by a plurality of sensors. Depending on the accuracy, a part of the sensors described above may be used, and further, a steering rotation sensor, a wheel sensor of each rolling wheel, or the like may be used.

  As the operation switch group 7, for example, a touch switch or a mechanical switch integrated with the display device 10 is used. The touch switch is composed of infrared sensors that are finely arranged vertically and horizontally on the screen of the display device 10. For example, when the infrared ray is cut off with a finger, a touch pen, or the like, the cut-off position becomes a two-dimensional coordinate value (X, Y). A pointing device such as a mouse or a cursor may be used. Various instructions can be input by the operation switch group 7 and the remote control terminal 12.

  In addition to the operation switch group 7 and the remote control terminal 12, it is also possible to input various instructions using the voice recognition unit 30. In this method, when a voice is input from a microphone 31 connected to the voice recognition unit 30, the voice signal is subjected to voice recognition processing by a known voice recognition technique, and converted into an operation command corresponding to the result. .

  The control circuit 8 (diagnostic means, coordinate calculation means of the present invention) is configured as a normal computer, and is a well-known CPU 81, ROM 82, RAM 83, I / O 84 which is an input / output circuit, and a bus line 85 connecting these configurations. Is provided. The CPU 81 controls the navigation program 21b and data stored in the HDD 21. The CPU 81 controls the reading / writing of data to / from the HDD 21.

  The HDD 21 also stores map data 21a including road data. In addition, the user can write data independently. The contents of these data can be rewritten by operating the operation switch group 7 and the remote control terminal 12 or by voice input. It is also possible to update the contents of the HDD 21 by reading data from the storage medium 20 using the external information input / output device 6. Moreover, the structure which records the data received via in-vehicle LAN (Local Area Network) 22 which exchanges data between the other control apparatuses in a vehicle may be taken.

  The HDD 21 also stores a history information storage area (abbreviated as history information) 21c for storing history information that is a basis for failure diagnosis. The stored contents will be described later.

  The semiconductor storage device 9 (second storage device of the present invention) is composed of a rewritable semiconductor such as RAM or flash ROM, and stores information and data necessary for operation of the navigation device 100 such as vehicle history information. Yes. The semiconductor storage device 9 is configured to retain the stored contents even when the accessory switch of the vehicle is turned off (that is, the navigation device 100 is turned off).

  Instead of recording a part of the vehicle history information in the semiconductor memory device 9, the RAM 83 or a device to be subjected to failure diagnosis, for example, the semiconductor memory device 42 of the audio device 41, the semiconductor memory device 44 of the air conditioner 43, Alternatively, it can be recorded in the semiconductor storage device 46 of the engine control computer 45. Note that the semiconductor memory device 9 may not be used when a part of the vehicle history information and information and data necessary for the operation of the navigation device 100 can be recorded in the RAM 83.

  The display device 10 is composed of a color liquid crystal display. On the screen of the display device 10, the vehicle current position mark input from the position detector 1, the map data 21a input from the HDD 21, and further on the map. The additional data such as the guidance route to be displayed is displayed in a superimposed manner, and menu buttons for setting route guidance, guidance during route guidance, and switching the screen are displayed on this screen.

  The transmission / reception device 13 is a device for communicating with, for example, a VICS (Vehicle Information and Communication System) center 14. Information received from the outside via the transmission / reception device 13 is processed by the control circuit 8. In addition, as a device used as the transmission / reception device 13, a mobile communication device such as a car phone or a mobile phone may be used.

  Further, by connecting a mobile communication device such as a mobile phone 17 or a car phone to the communication unit 19, connection to an external network is possible and connection to the Internet or the like is possible. Furthermore, by communicating with an ETC (Electronic Toll Collection) vehicle-mounted device 16, the fee information received by the ETC vehicle-mounted device 16 from the ETC road device can be taken into the navigation device 100. Moreover, it is also possible to connect with an external network by the ETC onboard equipment 16. A configuration for communicating with the VICS center 14 via the cellular phone 17 or the ETC vehicle-mounted device 16 may be adopted.

  With this configuration, when the navigation program 21 b is activated by the CPU 81 of the control circuit 8, the navigation device 100 is operated by the driver operating the operation switch group 7 or the remote control terminal 12 or inputting voice from the microphone 31. When the route guidance process for displaying the destination route on the display device 10 is selected from the menu displayed on the display device 10, the following processing is performed. That is, when the driver inputs the destination based on the map on the display device 10, the current position of the vehicle is obtained based on the satellite data obtained from the GPS receiver 5, and the optimum position from the current position to the destination is determined. A process for obtaining a route is performed. Then, the guidance route is displayed on the road map on the display device 10 so as to guide the driver to the appropriate route. As a method for automatically setting an optimal route, a method such as the Dijkstra method is known. In addition, at least one of the display device 10 and the speaker 15 provides a notification according to the guidance during operation or the operation state.

(Communication information recording process)
FIG. 3 is a flowchart showing an example of processing for recording communication information between the navigation device 100 and a device to be subjected to failure diagnosis. This process is repeatedly executed together with other processes of the navigation program 21b. First, it is checked whether there is transmission / reception data. If there is transmission / reception data (S1: Yes), the communication data is recorded in the history information 21c of the HDD 21 as it is (S2). Then, it is determined whether an error has occurred in the communication from the communication data by parity, checksum, CRC (Cyclic Redundancy Checksum), etc. (S3). When a communication error occurs (S4: Yes), an error code predetermined for each error type is recorded in the semiconductor memory device 9 (S5). When data is recorded in the HDD 21 (history information 21c) and the semiconductor memory device 9, the date / time data is recorded together so that the generation time of the data can be specified.

  FIG. 9 shows an example of recorded data. As shown in FIG. 9A, the HDD 21 (history information 21c) records the transmission source, the transmission destination, and the communication data contents together with time data (six digits of hour, minute, second) every time communication occurs. Instead of the time data, an internal counter value (so-called system time) of the CPU 81 may be used. On the other hand, as shown in FIG. 9B, when a communication error occurs, the semiconductor storage device 9 records the transmission source and the content of the communication error together with the time when the communication error occurred. In the example of FIG. 9, since the audio switching instruction is issued from the navigation (navigation device 100) to the audio device 41 at time: 011710, the audio device 41 does not respond to the completion of the voice switching. 9 records “time: 011710, transmission source: audio (audio device 41), error content: no communication response”.

  FIG. 10 shows a flowchart of the failure diagnosis process. This process is repeatedly executed together with other processes of the navigation program 21b. For example, in FIG. 9, it is assumed that the voice from the audio device 41 is not switched to the guidance voice from the navigation device 100 and a problem occurs that “the guidance voice of the navigation device 100 does not come out”. In this case, first, data recorded in the semiconductor memory device 9 is read. Subsequently, when an error relating to communication is recorded in the data even in communication other than the audio device 41 (S62: No), it is considered that the communication line (in-vehicle LAN) is defective. Check (S67). At this time, a guidance message such as “Check the wire harness” may be displayed on the display device 10.

  If an error relating to communication occurs only in communication with the audio device 41 (S62: Yes), it can be estimated that the audio device 41 is defective. Then, it is investigated whether or not the data (HDD data) recorded in the HDD 21 can be read out. If the HDD 21 fails and the data cannot be read out (S64: No), the recorded data causes a further cause. Since estimation is impossible, a message is displayed on the display device 10 (S68). In this case, although detailed cause estimation is impossible, it can be presumed that the audio device 41 is defective. Therefore, the navigation device 100 main body is incorrectly replaced just because “the guidance voice of the navigation device 100 does not come out”. There is nothing.

  If the data recorded on the HDD 21 can be read (S64: Yes), the data (history information 21c) recorded on the HDD 21 is read (S65). Then, the cause of the error is investigated by examining the error occurrence condition from the history information 21c (S66). In the example of FIG. 8, at the time of 010230, the audio device 41 responds to the voice switching instruction from the navigation device 100, but at the time of 0117710, the navigation device 100 sends the audio device. In spite of the voice switching instruction being issued to 41, there is no voice switching completion response from the audio device 41. When the difference in conditions at this time is investigated from the preceding and succeeding data, the audio device 41 starts the seek operation at the FM frequency at time: 011545 and ends the seek operation at time: 013108. That is, at time 011710, the audio device 41 is in a seek operation, and under this condition, the software on the audio device 41 side cannot accept an instruction from another device, for example, during an FM frequency seek operation. It is estimated that there is.

  Since communication data with the audio device 41 and the like is enormous, it is stored in a large-capacity HDD 21 (history information 21c), and the communication error information obtained as a result of analyzing the communication data is small in size, so that it is a highly reliable semiconductor memory. Accumulate in device 9. Then, when a failure related to communication occurs, if the cause is relatively simple, such as a failure of the wire harness, the cause can be specified only by the communication error presence / absence information stored in the semiconductor storage device 9, and therefore the HDD 21 Even if the actual communication data cannot be read due to failure, the cause can be investigated. If the cause of the software malfunction is complicated, it is difficult to determine the cause if the data in the HDD 21 cannot be read. However, a failure actually occurred due to the communication error information stored in the semiconductor memory device 9. This makes it possible to determine whether or not normal products are erroneously exchanged.

(Variation 1 of communication information recording process)
FIG. 4 is a flowchart showing another example of processing for recording communication information between the navigation device 100 and a device to be subjected to failure diagnosis. This process is repeatedly executed together with other processes of the navigation program 21b. First, it is checked whether there is transmission / reception data. If there is transmission / reception data (S11: Yes), the communication data is recorded in the semiconductor storage device 9 or a temporary storage buffer assigned to the RAM 83 (S12). Then, it is determined whether an error has occurred in communication from the communication data by parity, checksum, CRC (Cyclic Redundancy Checksum), etc. (S13). If an error occurs (S14: Yes), an error code predetermined for each type of error is recorded in the semiconductor memory device 9 (S15). When data is recorded in the HDD 21 and the semiconductor storage device 9, the date / time data is recorded together so that the data generation time can be specified. Then, the communication data recorded in the temporary storage buffer when the error occurs is recorded in the HDD 21 (history information 21c) (S16).

  In the above configuration, only data at the time of error occurrence is stored in the HDD 21, so that the used capacity of the HDD 21 can be reduced, and other data or information can be stored. In addition, a smaller capacity HDD can be used, and the manufacturing cost can be reduced. Note that if the capacity of the temporary storage buffer is increased, a configuration in which a plurality of communication data before and after the occurrence of a communication error is recorded in the HDD 21 can be adopted.

(Variation 2 of the communication information recording process)
FIG. 5 is a flowchart showing yet another example of processing for recording communication information between the navigation device 100 and a device to be subjected to failure diagnosis. This process is repeatedly executed together with other processes of the navigation program 21b. This is to record communication data when an error occurs together with communication error information when the capacity of the semiconductor memory device 9 is sufficient. The point that all communication data is recorded in the HDD 21 (S21 to S25) is the same as the example of FIG.

  When a communication error occurs (S24: Yes), an error code predetermined for each type of communication error is recorded in the semiconductor memory device 9 (S25), and the occurrence of the communication error recorded in the HDD 21 occurs. The communication data before and after the recording is also recorded in the semiconductor memory device 9 (S26). In this configuration, even if the HDD 21 breaks down, communication data before and after the occurrence of the error is recorded in the semiconductor storage device 9, so that the cause investigation becomes easier than in the example of FIG.

(VICS reception information recording process)
FIG. 6 is a flowchart showing an example of processing for recording received information in communication between the navigation device 100 and the VICS center 14. This process is repeatedly executed together with other processes of the navigation program 21b. Since the data reception from the VICS center 14 is mobile communication, the degree of occurrence of a communication error is larger than the communication between devices that are the targets of failure diagnosis in the vehicle in FIGS. However, since the communication frequency is lower than the communication between devices that are the targets of failure diagnosis in the vehicle, the reception error rate is recorded in the semiconductor memory device 9 for all the communication. That is, when there is received data (S31: Yes), the communication data is recorded in the HDD 21 (history information 21c) (S32). Then, it is determined whether a reception error has occurred from the communication data by parity, checksum, CRC (Cyclic Redundancy Checksum), etc. (S33). If a reception error has occurred (S34: Yes), the reception error rate (ratio of the number of reception error occurrences to the number of transmission / receptions) is recorded in the semiconductor memory device 9 (S34).

(GPS reception information recording process)
FIG. 7 is a flowchart showing an example of processing for recording GPS reception information. This process is repeatedly executed together with other processes of the navigation program 21b. When data from the GPS is received by the GPS receiver 5 (S41), the received data is recorded in the HDD 21 (history information 21c) (S42). And the error due to the coordinates of the current position and the satellite arrangement from the received data (for example, the radio wave speed changes due to the ionosphere and water vapor in the atmosphere before the radio wave emitted from the satellite reaches the receiver, and the error in the positioning. It is obtained by calculating an estimation error represented by (given) (S43) and recorded in the semiconductor memory device 9 (S44).

  Since the position detector 1 of the navigation device 100 includes the geomagnetic sensor 2, the gyroscope 3, and the distance sensor 4 in addition to the GPS receiver 5, the geomagnetic sensor 2, the gyroscope 3, and the distance sensor 4 are calculated when calculating the estimation error. The data collected by the distance sensor 4 may be combined and recorded in the semiconductor memory device 9.

(GPS reception information, current position information recording process)
FIG. 8 is a flowchart showing an example of processing for recording current position information including map matching processing in addition to the GPS reception information of FIG. This process is repeatedly executed together with other processes of the navigation program 21b. Here, the map matching is to match the vehicle speed data detected by the GPS positioning and the vehicle speed sensor 23 and the vehicle position obtained from the output data of the gyroscope 3 to the road on the map displayed on the display device 10. Say. Since the process (S51 to S53) for calculating the coordinates of the current position and the estimation error from the GPS reception information is the same as the GPS reception information recording process described above, a detailed description thereof is omitted.

  After calculating the coordinates of the current position and the estimation error from the GPS reception information, map matching is performed using the vehicle speed data detected by the vehicle speed sensor 23, the geomagnetic sensor 2, the gyroscope 3, the output data of the distance sensor 4, and the map data 21a. The coordinates of the current position of the vehicle are obtained (S54). The coordinates of the current position calculated from the GPS reception information are compared with the coordinates of the current position obtained by the map matching, and the difference between the coordinates of the current position calculated from the GPS reception information and the coordinates of the current position calculated by the map matching is compared. If the value exceeds the predetermined range, the coordinates of the current position obtained by map matching are used as the coordinates of the true current position (S55). Then, data in the process of the map matching process, such as the received data from the GPS, the vehicle speed data, the output data of the gyroscope 3, the estimated probability for each candidate road of the current position estimated in the map matching process, is recorded in the HDD 21 ( S56). Finally, the finally obtained coordinates of the current position and the estimation error are recorded in the semiconductor memory device 9 (S57).

  The vehicle speed sensor 23 includes a rotation detection unit such as a known rotary encoder. For example, the vehicle speed sensor 23 detects the rotation speed of a wheel and obtains the vehicle speed. In addition to the method of directly connecting the vehicle speed sensor 23 to the navigation device 100, a method of receiving vehicle speed data from another device via the in-vehicle LAN 22 may be used.

  Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

The block diagram which shows the whole structure of a failure diagnosis apparatus. The block diagram which shows the structure of a navigation apparatus. The flowchart for demonstrating a communication information recording process. The flowchart for demonstrating a communication information recording process (modification 1). The flowchart for demonstrating a communication information recording process (modification 2). The flowchart for demonstrating a communication information recording process with VICS. The flow chart for explaining GPS reception information and present position information recording processing. The flow chart for explaining GPS reception information and present position information recording processing (modification). The figure which shows an example of the content of a communication record. The flowchart for demonstrating failure diagnosis processing.

Explanation of symbols

1 Position detector (Position information collecting means)
5 GPS receiver 7 Operation switch group 8 Control circuit (diagnosis means, coordinate calculation means)
9 Semiconductor memory device (second memory device)
10 Display device 13 Transceiver 14 VICS center 21 Hard disk device (HDD, first storage device)
22 Car LAN
41 Audio device 43 Air conditioner device 45 Engine control computer 100 Navigation device

Claims (7)

In a vehicle diagnostic apparatus for diagnosing a failure of a diagnostic target device based on diagnostic information including history information in operation of the diagnostic target device for a diagnostic target device to be diagnosed for a failure mounted on a vehicle,
First storage means for storing the diagnostic information;
Diagnosing means for performing arithmetic processing on data serving as a basis of diagnosis accumulated in the first storage device and outputting a diagnosis result about a failure of the diagnosis target device;
A vehicle diagnostic apparatus comprising: a second storage unit that stores a diagnosis result output from the diagnostic unit.   The vehicle diagnostic apparatus according to claim 1, wherein the first storage device includes a hard disk device, and the second storage device includes a semiconductor storage device.   A storage device for a vehicle navigation device that displays the current position of the vehicle on an electronic map and helps the vehicle travel is used as a storage device for the vehicle diagnosis device, and the storage device for the vehicle navigation device is the first storage device. The vehicle diagnostic apparatus according to claim 1, comprising a storage device and the second storage device.   The first storage device stores data before arithmetic processing that is a basis of diagnosis by the diagnostic means and intermediate data generated in the arithmetic processing process, and the second storage device stores data before the arithmetic processing. The vehicle diagnostic apparatus according to any one of claims 1 to 3, wherein data of a calculation result output from the intermediate data during the calculation process is output by the diagnosis unit.   The first storage device stores communication data between the diagnosis target device and another device, and the second storage device stores communication error data diagnosed by the diagnosis unit from the communication data. The vehicle diagnostic apparatus according to any one of claims 1 to 3, wherein the vehicle diagnostic apparatus is stored.   Position information collecting means for collecting data serving as a basis for detecting the current position of the vehicle, and coordinate calculating means for calculating coordinates of the current position of the vehicle based on the collected data, 4. The vehicular diagnostic apparatus according to claim 1, wherein a storage device of 1 stores the collected data, and the second storage unit stores coordinates of the calculated current position. 5. Position information collecting means for collecting data serving as a basis for detecting the current position value of the vehicle, and coordinate calculating means for calculating coordinates of the current position of the vehicle based on the collected data, The first storage device stores the collected data and intermediate data generated during calculation by the coordinate calculation means, and the second storage means stores the calculated coordinates of the current position. 4. The vehicle diagnostic apparatus according to any one of 3 above.

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