JP2006197017A - Diagnosis system for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diagnosis system for vehicle that can achieve adequate answers to requests from a plurality of external devices. <P>SOLUTION: The diagnosis system for vehicle that enables diagnosis information to be requested and answered among an ECU 70 in the vehicle, a center 42, and a dedicated tool 44 and diagnoses the vehicle on the basis of diagnosis information that an external device obtains is equipped with a communication module 12 capable of two-way communication with the center 42, a communication controller 20 controlling the communication of the communication module, and a communication network which connects the communication controller and ECU together and to which the dedicated tool 44 can be connected. The ECU has a function of generating a diagnosis answer signal including different kinds of pieces of diagnosis information according to kinds of requests from the center 42 and dedicated tool 44 and the communication controller transmits only a diagnosis answer signal including a designated kind of diagnosis information among diagnosis answer signals obtained through the communication network to the center 42 through the communication module. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle diagnostic system in which an external device diagnoses a vehicle based on diagnostic information obtained from an electronic device in the vehicle.

  Conventionally, in this type of vehicle diagnostic system, the electronic device in the vehicle is a request from the center, a service tool prepared for a car dealer, an inspection tool used in a production line, a request from a user's mobile phone, etc. Thus, a configuration that responds to requests from various terminals (external devices) is known (see, for example, Patent Document 1).

In addition, a system is known that intermittently monitors a non-control device (on-vehicle device) and notifies the user of the abnormality via a network and a portable information terminal when abnormality of the on-vehicle device is detected (for example, Patent Document 2) reference).
JP 2003-345421 A JP 2003-296860 A

  However, in a configuration that responds to requests from various external devices as in the above-described prior art (Patent Document 1), a situation may occur in which requests from two or more external devices are simultaneously performed. In this regard, the above-described conventional technology does not assume a situation in which such contention occurs, and is insufficient as a configuration that responds to requests from a plurality of external devices.

  Accordingly, an object of the present invention is to provide a vehicle diagnostic system that can realize an appropriate response to requests from a plurality of external devices.

In order to solve the above-described problem, according to one aspect of the present invention, it is possible to request and respond to diagnosis information between an electronic device in a vehicle and a plurality of external devices, and based on the diagnostic information obtained by the external device. A vehicle diagnosis system for diagnosing a vehicle,
A communication module capable of bidirectional communication with a first external device of the plurality of external devices;
A communication control device for controlling communication of the communication module;
A communication network that connects the communication control device and an electronic device in a vehicle, and includes a communication network to which a second external device of the plurality of external devices can be connected;
The electronic device in the vehicle has a function of generating a diagnosis response signal including different types of diagnosis information according to the type of request from the external device,
The communication control device has a function of transmitting only a diagnostic response signal including a predetermined type of diagnostic information out of diagnostic response signals obtained via the communication network to the first external device via the communication module. A vehicle diagnostic system is provided.

  In this aspect, the diagnosis response signal may be a signal that is broadcast via the communication network and can be received by each device connected to the communication network. The communication control device may include identification means for identifying the type of diagnostic information included in the diagnostic response signal, and a map that defines the type of diagnostic information to be sent to the first external device. The type of diagnostic information defined in the map may be rewritable according to the request of the second external device. The type of diagnostic information defined in the map may be rewritable according to user input information for an input device in a vehicle connected to the communication network. Among the diagnosis response signals obtained via the communication network, the diagnosis response signal identified by the identification means does not correspond to the diagnosis information type defined in the map is sent to the first external device. It may be discarded by the communication control device without being transmitted via the communication module. The first external device may be a center capable of providing an information providing service to a plurality of vehicles, and the second external device may be a dedicated tool provided at a repair shop or a dealer.

According to another aspect of the present invention, it is possible to request and respond to diagnosis information between an electronic device in the vehicle and a plurality of external devices, and the vehicle is based on the diagnosis information obtained by the external device. A vehicle diagnostic system for diagnosing,
A communication module capable of bidirectional communication with a first external device of the plurality of external devices;
A communication network to which the communication module and the electronic device in the vehicle are connected, and a communication network to which a second external device of the plurality of external devices can be connected;
The electronic device in the vehicle has a function of generating a diagnosis response signal including different types of diagnosis information according to a request from the first external device and a request from the second external device,
The first external device is a center capable of providing an information providing service to a plurality of vehicles,
The diagnostic response signal obtained via the communication network is randomly sent to the center via the communication module,
The center has a function of identifying a diagnostic response signal generated according to its own request from among the diagnostic response signals obtained at random, and a diagnostic system for a vehicle is provided. .

  ADVANTAGE OF THE INVENTION According to this invention, the diagnostic system for vehicles which can implement | achieve an appropriate response with respect to the request | requirement from a some external apparatus can be obtained.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a system configuration diagram showing an embodiment of a vehicle diagnostic system according to the present invention. The vehicle diagnostic system of the present embodiment includes an integrated control device 10 mounted on a vehicle and an external device 40 that is not mounted on the vehicle.

  The integrated control device 10 includes a communication module (data communication module) 12 capable of bidirectional communication (wireless communication) with the center 42 and a master control device 20.

  The communication module 12 may be a module integrated with the master control device 20, or may be a unit (for example, an information terminal such as a mobile phone) detachably connected to the master control device 20. Alternatively, the communication module 12 may be a unit connected to the master control device 20 via a wireless communication network or a LAN.

  The master control device 20 may be configured by a microcomputer, and may be, for example, an ECU that realizes a navigation function together with information display control for a multi-display provided in a vehicle. In this case, the master control device 20 acquires desired information from the center 42 via the communication module 12 or performs map guidance display in response to user input via a graphical user interface (GUI) to the multi-display. Various functions are realized. Moreover, the master control apparatus 20 implement | achieves the gateway function in communication between the center 42 which is the external apparatus 40, and each ECU70 in a vehicle so that it may mention later.

  A plurality of electronic control units (ECUs) 70 in the vehicle are connected to the master controller 20 via a multiplex communication network. The ECU 70 includes various ECUs that are normally mounted on a vehicle, such as an engine ECU that controls engine control. In the present embodiment, the plurality of ECUs 70 are classified into a master ECU 72 and a slave ECU 74. The master ECU 72 can follow a plurality of predetermined slave ECUs 74. Hereinafter, these are collectively referred to as ECU 70 when it is not necessary to distinguish between them.

  The multiplex communication network may be based on a communication protocol such as CAN (controller area network), LIN, etc. For example, CAN (high speed) is used for electronic components (for example, engine, brake) of a power train system, CAN (medium speed) is used for body-type electronic components (for example, doors, seats, etc.).

  Various information and data are transmitted and received between the master controller 20 and each ECU 70, that is, on the multiplex communication network. For example, on the multiplex communication network, diagnostic information relating to each ECU 70 is broadcast from each ECU 70.

  The external device 40 includes a center 42 provided for each predetermined service area and a dedicated tool 44.

  The center 42 has a function of requesting predetermined diagnosis information from the vehicle side. Here, the diagnosis information is various information useful for diagnosing the vehicle (information on various electronic components in the vehicle and the ECU 70), information that informs only the presence or absence of a failure (abnormality), the location of the failure, A wide range of information to inform the extent, operation data before and after the occurrence of the failure (operation data and freeze frame data of the system and each electronic component constituting it), occurrence of the failure (abnormality), vehicle position and vehicle speed at that time, etc. Information may be included.

  The center 42 includes the ID assigned to the requested vehicle in the header area in the request signal, and also includes a request code for specifying the requested diagnosis information in the data area in the request signal. Request diagnostic information. The request from the center 42 may be realized in response to warning information (notification of occurrence of a warning signal) from the master control device 20 to the center 42. For example, in response to a warning lighting / flashing request signal (warning signal) generated by each ECU 70 (typically, ECU), the master control device 20 notifies the center 42 of the generation of the warning signal and notifies the notification. The received center 42 requests the master control device 20 to transmit predetermined diagnostic information.

  When the master control device 20 receives this request signal via the communication module 12, the master control device 20 acquires diagnostic information from the predetermined ECU 70 related to the request content and transmits it to the center 42 via the communication module 12.

  The diagnostic information received by the center 42 via the communication module 12 in this manner is appropriately processed by an appropriate terminal in the center 42 and used for vehicle diagnosis.

  The dedicated tool 44 may be embodied as a service tool supplied from a car manufacturer to a car dealer or the like, or an inspection tool used for inspection in a car manufacturer's production line or the like. The dedicated tool 44 may be a user's mobile phone. The dedicated tool 44 may be a personal computer installed in a card dealer or the like.

  The dedicated tool 44 is configured to be connectable to a multiplex communication network in the vehicle by wire. For example, the dedicated tool 44 can be connected to the multiplex communication network by a connector set on the instrument panel (for example, the side of the steering column), and communicates with each ECU 70 via the multiplex communication network in the connected state. It becomes possible.

  Similar to the center 42, the dedicated tool 44 has a function of requesting predetermined diagnosis information from the vehicle side.

  The dedicated tool 44 includes the ID assigned to the requested vehicle in the header area in the request signal, and includes a request code for specifying the requested diagnosis information in the data area in the request signal. Request predetermined diagnostic information. At this time, the request signal from the dedicated tool 44 is received by the requesting ECU 70 via the multiplex communication network, and the response signal from the ECU 70 is received by the dedicated tool 44 via the multiplex communication network.

  The diagnostic information received by the dedicated tool 44 in this way is appropriately processed by, for example, a terminal in the card dealer or the dedicated tool 44 itself, and used for vehicle diagnosis.

  By the way, in the present embodiment, as described above, various types of diagnostic information can be requested from the same vehicle from two or more different types of external devices 40 such as the center 42 and the dedicated tool 44. However, as described above, there are various types of diagnostic information, and there are differences in diagnostic capability and diagnostic purpose between the center 42 side and the dedicated tool 44 side. The diag information required by the side may be the same or different.

  On the other hand, in the present embodiment, the requesting ECU 70 collects and generates diagnostic data corresponding to the request contents included in the data area of the request signal, and includes this in the data area in the response signal, so that the multiplex communication network It is the structure which broadcasts via.

  In such a configuration, when the dedicated tool 44 is connected to the multiplex communication network, a response signal (hereinafter referred to as “diag response signal”) generated by the requesting ECU 70 is transmitted via the multiplex communication network. As well as being received by the master controller 20.

  Therefore, in such a configuration, the master control device 20 is generated in response to a request from the center 42 even though the master control device 20 receives a diagnosis response signal generated in response to a request from the dedicated tool 44. There is a possibility that the diagnosis response signal is received and the diagnosis response signal is transferred to the center 42. Such a possibility is particularly high in a competitive state in which the center 42 and the dedicated tool 44 make separate requests in substantially the same time domain. If transmission of such a diagnosis response signal to the center 42 is executed, not only the communication economy is bad, but also an incorrect diagnosis response signal (a diagnosis response signal not corresponding to the request) is analyzed on the center 42 side. Inconvenience can occur.

  This embodiment is characterized by avoiding such inconvenience, which will be described in detail below.

First, for the sake of explanation, in this embodiment, it is assumed that the diagnostic information that can be requested by the center 42 and the diagnostic information that can be requested by the dedicated tool 44 may be different. Then, it is assumed that diagnosis information can be requested to the ECU 70 in a plurality of modes (eight modes in this example), and diagnosis information A1-A8 is generated according to each mode at that time. Of these, the diagnosis information that can be requested by the center 42 is referred to as diagnosis information A1-A5, and the diagnosis information A1-A8 that can be requested by the dedicated tool 44. In this case, the diagnosis information A6-A8 is diagnosis information that can be requested only by the dedicated tool 44.
Here, for example, when requesting diagnosis information A1, the request signal includes the ID of the requesting ECU of the diagnosis information A1 in the header, and a code indicating the request content (in this case, diagnosis information A1) in the data area. Included. The ECU 70 that has received this request signal generates a diagnosis response signal corresponding to the request content of the request signal (in this case, the diagnosis information A1). For example, the master ECU 72 that has received the request signal requests a predetermined slave ECU 74 to output necessary diagnosis data, and thereby generates a diagnosis response signal using the diagnosis data obtained from each slave ECU 74. Alternatively, if the diagnosis data obtained from the predetermined slave ECU 74 is acquired and stored in advance, the master ECU 72 generates a diagnosis response signal using the stored data without making a new request.

  In the diagnosis response signal, the ID of the multiplex communication network (for example, CAN ID) is included in the header, and the diagnosis data is included in the data area as response contents (in this case, diagnosis information A1). This diagnosis response signal is sent to the multiplex communication network and is received by the master control device 20 connected to the multiplex communication network as described above.

  FIG. 2 is a functional block diagram of the master control device 20. The master control device 20 includes a transmission necessity determination unit 22 that determines the necessity of transmission of diagnostic information to the center 42 and a diagnostic information acquisition unit 24 that acquires diagnostic information via a multiplex communication network. In addition, the master control device 20 includes a map storage unit 26 that stores a map (table) that represents diagnostic information that can be requested by the center 42 (in this example, diagnostic information A1-A5). Note that the master control device 20 may be configured by a microcomputer, and the map storage unit 26 may be embodied as a rewritable nonvolatile memory (for example, EEPROM).

  FIG. 3 is a flowchart illustrating an example of the flow of processing by the master control device 20 of the present embodiment.

  When the diagnosis information acquisition unit 24 acquires a diagnosis response signal from the multiplex communication network (step 100), the transmission necessity determination unit 22 determines whether the diagnosis response signal is generated as a response to the request from the center 42. Is determined (step 110). This is because, as described above, the diagnosis information acquisition unit 24 is randomly supplied with a diagnosis response signal via the multiple communication network.

  In step 110, the transmission necessity determination unit 22 determines whether the diagnosis data included in the data area of the diagnosis response signal is the diagnosis information that can be requested by the center 42 based on the map in the map storage unit 26. to decide.

  For example, when the diagnosis data included in the data area of the diagnosis response signal is related to the diagnosis information A6, the transmission necessity determination unit 22 does not generate the diagnosis response signal as a response to the request from the center 42. The diagnosis response signal is discarded (step 120). At this time, whether or not the diagnostic data in the data area of the diagnostic response signal relates to the diagnostic information A6 may be determined based on the diagnostic data itself. For example, the type of diagnostic data included in the header portion of the data area May be determined on the basis of a code indicating the above or such information that can be embedded in the header of the diagnosis response signal.

  On the other hand, when the diagnosis data included in the data area of the diagnosis response signal is related to the diagnosis information A4, the transmission necessity determination unit 22 determines that the diagnosis response signal is generated as a response to the request from the center 42. Judgment is made and the diagnosis response signal is transferred to the center 42 (step 130).

  As described above, according to the present embodiment, by providing the master control device 20 with the transmission necessity determination unit 22, a diagnostic response signal that is not generated as a response to the request of the center 42, for example, the dedicated tool 44 responds to the request. A diagnosis response signal generated as a response or a diagnosis response signal in which some error has occurred is prevented from being sent to the center 42. Thereby, waste of communication can be eliminated and the processing load of the center 42 can be reduced. The diagnosis response signal discarded in step 120 is transmitted to the dedicated tool 44 by broadcast as long as the dedicated tool 44 is connected to the multiplex communication network.

  In the present embodiment, the transmission necessity determination unit 22 of the master control device 20 receives the diagnosis from the center 42 within a predetermined time before the diagnosis information acquisition unit 24 acquires the diagnosis response signal together with the determination in step 110. It may be determined whether or not there is a request signal. Since the request signal from the center 42 is passed through the multiplex communication network via the master control device 20, the transmission necessity judgment unit 22 of the master control device 20 determines whether or not there is a request signal from the center 42. Easy to judge. In this case, the transmission necessity determination unit 22 may determine the consistency between the request content included in the data area of the request signal and the response content included in the data area of the diagnosis response signal.

  FIG. 4 is a flowchart illustrating another example of the processing flow by the master control device 20 of the present embodiment.

  When the diagnosis information acquisition unit 24 acquires a diagnosis response signal from the multiplex communication network (step 200), the transmission necessity determination unit 22 determines whether the diagnosis response signal is generated as a response to the request from the center 42. Is determined (step 210). This is because, as described above, the diagnosis information acquisition unit 24 is randomly supplied with a diagnosis response signal via the multiple communication network.

  In step 210, the transmission necessity determination unit 22 determines whether the diagnosis data included in the data area of the diagnosis response signal is the diagnosis information that can be requested by the center 42 based on the map in the map storage unit 26. to decide. For example, when the diagnosis data included in the data area of the diagnosis response signal is related to the diagnosis information A6, the transmission necessity determination unit 22 does not generate the diagnosis response signal as a response to the request from the center 42. And proceed to step 230. At this time, whether or not the diagnostic data in the data area of the diagnostic response signal relates to the diagnostic information A6 may be determined based on the diagnostic data itself. For example, the type of diagnostic data included in the header portion of the data area May be determined on the basis of a code indicating the above or such information that can be embedded in the header of the diagnosis response signal.

  On the other hand, when the diagnosis data included in the data area of the diagnosis response signal is related to the diagnosis information A4, the transmission necessity determination unit 22 determines that the diagnosis response signal is generated as a response to the request from the center 42. Judgment is made and the diagnosis response signal is transferred to the center 42 (step 270).

  In step 230, the transmission necessity determination unit 22 determines whether or not there is a request signal from the center 42 within a predetermined time T1 before the diagnosis information acquisition unit 24 acquires the diagnosis response signal. Since the request signal from the center 42 is passed through the multiplex communication network via the master control device 20, the transmission necessity judgment unit 22 of the master control device 20 determines whether or not there is a request signal from the center 42. Easy to judge.

  In this step 230, when it is determined that the request signal from the center 42 has been received before the predetermined time T1, the transmission necessity determination unit 22 waits until the predetermined time T2 elapses from the time when the request signal from the center 42 is received. Then, it is determined whether or not the diagnosis information acquisition unit 24 acquires another diagnosis response signal within the predetermined time T2 (step 240).

  In this step 240, when the diagnosis information acquisition unit 24 acquires another diagnosis response signal, the transmission necessity determination unit 22 performs the other determination based on the map in the map storage unit 26 as in step 210. It is determined whether or not the diagnostic data included in the diagnostic response signal data area is diagnostic information that can be requested by the center 42 (step 250). For example, when the diagnosis data included in the data area of the other diagnosis response signal is related to the diagnosis information A4, the transmission necessity determination unit 22 determines that the other diagnosis response signal is a response to the request from the center 42. It is determined that it has been generated, and the other diagnostic response signal is transferred to the center 42 (step 270).

  On the other hand, if it is determined in step 230 that there is no request signal from the center 42 before the predetermined time T1, the transmission necessity determination unit 22 uses the diagnosis response signal obtained in step 200 as a response to the request from the center 42. It is determined that it has not been generated, and the diagnostic response signal is discarded (step 235). If the diagnosis information acquisition unit 24 does not acquire another diagnosis response signal in step 240, the transmission necessity determination unit 22 discards these diagnosis response signals and also executes a diagnosis response corresponding to the request. A signal indicating that no signal has been obtained is transferred to the center 42 (step 260).

  As described above, according to the present embodiment, by providing the master control device 20 with the transmission necessity determination unit 22, a diagnostic response signal that is not generated as a response to the request of the center 42, for example, the dedicated tool 44 responds to the request. A diagnosis response signal generated as a response or a diagnosis response signal in which some error has occurred is prevented from being sent to the center 42. Thereby, waste of communication can be eliminated and the processing load of the center 42 can be reduced. In addition, the processing of step 240 allows the diagnostic response signal generated as a response to the request of the center 42 to be reliably sent to the center 42 even in a situation where requests from a plurality of external devices 40 compete. By the processing of step 260, the center 42 can grasp how the request is processed on the vehicle side, and can cope with it such as making a re-request as necessary.

  In the present embodiment, the transmission necessity determination unit 22 of the master control device 20 performs the determination of the above step 110 and the request content included in the data area of the request signal and the response content included in the data area of the diagnosis response signal. Consistency may be determined.

  Next, embodiments relating to modifications and improvements to the above-described two embodiments will be described.

  In the first example, the map (table) stored in the map storage unit 26 can be rewritten by the external device 40. For example, the dedicated tool 44 transmits a new map together with the rewrite request signal to the map storage unit 26 of the master control device 20, and the new map is stored in the map storage unit 26 of the master control device 20. Thereby, even when it is desired to change the diagnostic information that can be requested by the center 42, the map in the map storage unit 26 may be rewritten, and such a change request can be flexibly handled. However, the type of diagnostic information defined in the map may be rewritable in response to a request from the center 42.

  In the second example, the map stored in the map storage unit 26 can be rewritten via an input device in the vehicle. For example, the map stored in the map storage unit 26 may be rewritten according to user input via a graphical user interface on the multi-display of the master control device 20. Thereby, the map of the map storage unit 26 can be rewritten without using the dedicated tool 44.

  In the third example, the function of the transmission necessity determination unit 22 in the above-described embodiment is provided on the center 42 side. That is, in the configuration in which the diagnosis response signal generated on the vehicle side is randomly transmitted to the center 42 via the communication module 12 of the master controller 20 as a result of being broadcast via the multiple communication network. The side may determine whether or not each received diagnostic response signal includes diagnostic information that can be requested by the center 42. At this time, whether or not the diagnosis data included in each diagnosis response signal is the diagnosis information that can be requested by the center 42 may be determined based on the diagnosis data itself in the data area of the diagnosis response signal. The determination may be made based on a code indicating the type of diagnosis data included in the header portion of the area, or such a code that can be embedded in the header of the diagnosis response signal. Such a code may be incorporated into the diagnosis response signal by the master controller 20, or may be incorporated at the time of generation by the ECU 70 from which the diagnosis response signal is generated.

  In the third example, the center 42 side may have an error determination function for the received diagnostic response signal. The error of the diagnosis response signal may be an error that occurs due to the influence of noise or the like during transmission from the communication module 12 of the master control device 20 or communication within the vehicle. When the master control device 20 has an error determination function as in the above-described embodiment, information indicating the presence or absence of the error may be superimposed on the diagnosis response signal transmitted to the center 42. Thereby, the center 42 can easily select and discard the diagnostic response signal including the error.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the present invention. Can be added.

  For example, in the embodiment described above, naturally, the type of diagnostic information that can be requested for each ECU 70 may differ, and the diagnostic information that can be requested by the center 42 is defined for each ECU 70 in the map stored in the map storage unit 26. Good. Further, the type of diagnosis information includes the same diagnosis information collected in temporally different areas. For example, as the type of diagnosis information, the diagnosis information at the time of failure occurrence, the current diagnosis information, or both may be selected and requested.

1 is a system configuration diagram showing an embodiment of a vehicle diagnostic system according to the present invention. 3 is a functional block diagram of a master control device 20. FIG. It is a flowchart which shows the flow of the process by the master control apparatus 20 which concerns on 1st Example. It is a flowchart which shows the flow of the process by the master control apparatus 20 which concerns on 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Integrated control apparatus 12 Communication module 20 Master control apparatus 22 Transmission necessity judgment part 24 Diag information acquisition part 26 Map storage part

Claims (8)

A diagnostic system for a vehicle that can request and respond to diagnostic information between an electronic device in a vehicle and a plurality of external devices, and diagnoses the vehicle based on diagnostic information obtained by the external device,
A communication module capable of bidirectional communication with a first external device of the plurality of external devices;
A communication control device for controlling communication of the communication module;
A communication network that connects the communication control device and an electronic device in a vehicle, and includes a communication network to which a second external device of the plurality of external devices can be connected;
The electronic device in the vehicle has a function of generating a diagnosis response signal including different types of diagnosis information according to the type of request from the external device,
The communication control device has a function of transmitting only a diagnostic response signal including a predetermined type of diagnostic information among diagnostic response signals obtained via the communication network to the first external device via the communication module. A diagnostic system for a vehicle characterized by the above.   The vehicle diagnosis system according to claim 1, wherein the diagnosis response signal is a signal that is broadcast via the communication network and is receivable by each device connected to the communication network.   The vehicle according to claim 1, wherein the communication control device includes identification means for identifying a type of diagnostic information included in a diagnostic response signal, and a map defining a type of diagnostic information to be sent to the first external device. Diagnostic system.   4. The vehicle diagnosis system according to claim 3, wherein the type of diagnostic information defined in the map is rewritable in response to a request from the second external device.   The diagnostic system for vehicles according to claim 1, wherein the type of diagnostic information defined in the map can be rewritten according to user input information for an input device in a vehicle connected to the communication network.   Among the diagnosis response signals obtained via the communication network, the diagnosis response signal identified by the identification means does not correspond to the diagnosis information type defined in the map is sent to the first external device. The vehicle diagnosis system according to claim 3, wherein the vehicle diagnosis system is discarded by the communication control device without being transmitted via the communication module. The first external device is a center capable of providing an information providing service to a plurality of vehicles,
The vehicle diagnostic system according to claim 1, wherein the second external device is a dedicated tool provided in a repair shop or a dealer. A diagnostic system for a vehicle that can request and respond to diagnostic information between an electronic device in a vehicle and a plurality of external devices, and diagnoses the vehicle based on diagnostic information obtained by the external device,
A communication module capable of bidirectional communication with a first external device of the plurality of external devices;
A communication network to which the communication module and an electronic device in the vehicle are connected, and a communication network to which a second external device of the plurality of external devices can be connected;
The electronic device in the vehicle has a function of generating a diagnosis response signal including different types of diagnosis information according to a request from the first external device and a request from the second external device,
The first external device is a center capable of providing an information providing service to a plurality of vehicles,
The diagnostic response signal supplied by the electronic device in the vehicle to the communication network is randomly sent to the center via the communication module,
The center has a function of identifying a diagnosis response signal generated according to its own request from among the diagnosis response signals received at random.

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