JP6500650B2 - Vehicle diagnostic apparatus, vehicle diagnostic method - Google Patents

Description

  The present invention relates to a vehicle diagnostic device and a vehicle diagnostic method.

  The prior art described in Patent Document 1 is configured such that the on-board terminal transmits vehicle information to a server via an external network, this server collectively manages the vehicle information, and can investigate and analyze the vehicle state in detail. There is.

JP, 2006-160126, A

Although it is conceivable to diagnose a vehicle using a cloud service, it may be out of communication range, and it is not always possible to use the cloud service. On the other hand, when all the vehicle diagnosis is performed only by the in-vehicle system, if it is intended to have the same function as the cloud service, not only the cost increases but also it is difficult to upgrade the hardware and software.
An object of the present invention is to enable a minimum diagnosis on the vehicle side even in a situation where it is out of communication range.

  A vehicle diagnostic device according to an aspect of the present invention stores normal vehicle condition data in an on-vehicle data storage unit mounted on a vehicle, and acquires a current vehicle condition data by the data acquisition unit. Further, the control unit controls the environment setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition. Then, after the environmental condition of the normal vehicle condition data matches the current environmental condition, the vehicle diagnosis unit acquires the normal vehicle condition data accumulated in the on-vehicle data accumulation unit and the current vehicle acquired by the data acquisition unit By comparing with the state data, it is diagnosed whether or not there is a malfunction in the vehicle.

  According to the present invention, it is possible to diagnose the presence or absence of a malfunction in the vehicle by comparing the normal vehicle condition data stored in the on-vehicle data storage unit with the current vehicle condition data. In addition, for example, even in a situation where normal vehicle condition data run short due to being out of the communication area, the environmental conditions of the normal vehicle condition data and the current environmental conditions are matched before diagnosing the presence or absence of a malfunction. The vehicle side can perform the minimum diagnosis.

It is a block diagram of a vehicle diagnostic device. It is a table | surface which shows an example of the normal vehicle condition data in a vehicle-mounted database. It is a table which shows an example of the normal vehicle state data in an external database. It is a flowchart which shows an example of a vehicle diagnostic process. It is a time chart of indoor temperature. It is a table which shows an example of the normal vehicle state data in an external database.

  Hereinafter, embodiments of the present invention will be described based on the drawings. Each drawing is schematic and may be different from the actual one. In addition, the following embodiments illustrate apparatuses and methods for embodying the technical idea of the present invention, and the configuration is not specified to the following. That is, the technical idea of the present invention can be variously modified within the technical scope described in the claims.

First Embodiment
"Constitution"
FIG. 1 is a block diagram of a vehicle diagnostic apparatus.
The vehicle diagnostic device 11 includes an in-vehicle system 12 and a network 13.
The in-vehicle system 12 includes an in-vehicle database 14, a data acquisition unit 15, a communication unit 16, a controller 17, an information transfer unit 18, and an air conditioning system 19.
The in-vehicle database 14 stores normal vehicle condition data. The normal vehicle condition data is data indicating the air conditioning capacity when the air conditioning system 19 is normal, and is mainly represented by the time until the cabin temperature reaches the set temperature.

FIG. 2 is a table showing an example of normal vehicle state data in the in-vehicle database.
Here, data of room temperature, preset temperature, required time, sunshine, outside air temperature, number of occupants when air conditioning capacity is normal is summarized, but it is not limited to this, and fan speed, It may include the open / closed state of the door or window.
For example, when the room temperature is 30 ° C, the set temperature is 20 ° C, the day illumination is weak, the outside air temperature is 29 ° C, and there are one occupant, it takes about 20 minutes to reduce the room temperature from 30 ° C to 20 ° C. . When the room temperature is 30 ° C, the set temperature is 22 ° C, the day illumination is medium, the outside air temperature is 28 ° C, and there are two occupants, it takes about 15 minutes to reduce the room temperature from 30 ° C to 22 ° C. . Also, when the room temperature is 29 degrees, the set temperature is 24 degrees, the sunshine is strong, the outside temperature is 31 degrees, and there are six occupants, it takes about 10 minutes to reduce the room temperature from 29 degrees to 24 degrees .

The data acquisition unit 15 acquires current vehicle state data via an in-vehicle communication network (in-vehicle LAN) such as CSMA / CA type multiplex communication (CAN: Controller Area Network) or Flex Ray, for example. Here, the room temperature, the set temperature, the sunshine intensity, the outside temperature, the number of occupants, the fan speed, the open / close state of the door and the window, and the like.
The communication unit 16 is connected to the network (Internet) 13 and performs data communication with the server 31 of the cloud service provider via the network 13.

The controller 17 is, for example, a microcomputer and executes vehicle diagnosis processing described later.
The information transfer unit 18 includes a touch panel and a speaker, and transmits various types of information to the driver. The touch panel is a device in which a touch-type input device and a liquid crystal panel are combined, and various information is displayed according to a command from the controller 17, and when the driver touches the touch surface of the liquid crystal panel Position information is input to the controller 17. For example, various inputs are performed by touching symbols or characters displayed on the liquid crystal panel. In addition, the speaker outputs various information by voice.

The air conditioning system 19 controls the air conditioning setting of the vehicle.
The controller 17 includes a vehicle diagnosis unit 21, a control unit 22, a data request unit 23, and a data update unit 24.
The vehicle diagnosis unit 21 diagnoses the presence or absence of a malfunction in the air conditioning system 19 by comparing the normal vehicle condition data accumulated in the in-vehicle database 14 with the current vehicle condition data acquired by the data acquisition unit 15. . The malfunction of the air conditioning system 19 is a state before a failure, and refers to a state which can not be detected by a fault diagnostic code (DTC: Diagnostic Trouble Cord) or a fail signal.

  When diagnosing the air conditioning system by the vehicle diagnosis unit 21, the control unit 22 controls the air conditioning setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition. For example, it is assumed that the current temperature is 28 degrees and the set temperature is set to 20 degrees in a state where there is normal vehicle condition data that it takes about 20 minutes to reduce the room temperature from 30 degrees to 20 degrees. . In this case, the indoor temperature is controlled to be 30 degrees via the air conditioning system 19 to make the environmental conditions match.

The data request unit 23 requests a part of the normal vehicle state data stored in the server 31 to the external server 31.
The data updating unit 24 accumulates the normal vehicle state data received via the communication unit 16 in the in-vehicle database 14 and performs updating.
Connected to the network 13 is a server 31 of a cloud service provider that provides software functions, platform functions for application execution, hardware and infrastructure functions.

The server 31 includes an external database 32 and a data extraction unit 33.
The external database 32 accumulates normal vehicle condition data. The normal vehicle condition data is data indicating the air conditioning capacity when the air conditioning system 19 is normal as described above, and is mainly represented by the time until the cabin temperature reaches the set temperature.
FIG. 3 is a table showing an example of normal vehicle state data in an external database.

The external database 32 has a large amount of vehicle condition data, and stores the vehicle condition data by type (vehicle type).
The data extraction unit 33 performs data communication with the in-vehicle system 12, and when receiving a request for normal vehicle condition data from the in-vehicle system 12, the normal vehicle condition data accumulated in the external database 32 according to the request And transmit it to the in-vehicle system 12. That is, in response to a request from the in-vehicle system 12, it extracts information from vehicles that are related to the same type of vehicle and that are closer to the current environmental conditions, and sends them to the in-vehicle system 12.

Next, vehicle diagnosis processing executed by the controller 17 will be described.
FIG. 4 is a flowchart showing an example of the vehicle diagnosis process.
In step S101, it is determined whether the in-vehicle system 12 can communicate with the network 13. Here, when communication is possible, the process proceeds to step S102. On the other hand, when communication is not possible, the process proceeds to step S104.

  In step S102, the normal vehicle state data accumulated in the external database 32 is requested to the server 31 of the cloud service provider. Specifically, it requests the vehicles of the same type with priority given to those that are close to the current environmental conditions. In response to this request, the data extraction unit 33 of the server 31 extracts the requested vehicle state data from the normal vehicle state data stored in the external database 32, and transmits the requested vehicle state data to the in-vehicle system 12.

In the subsequent step S103, the normal vehicle state data received from the server 31 is accumulated in the in-vehicle database 14 and updated.
In the subsequent step S104, the in-vehicle database 14 is referred to and normal vehicle state data is referred to.
In the subsequent step S105, current vehicle state data is acquired.

In the subsequent step S106, it is determined whether or not the environmental conditions of the normal vehicle state data match the current environmental conditions. Here, when the environmental conditions do not match, it is determined that the diagnosis of the air conditioning system 19 can not be performed, and the process proceeds to step S107. On the other hand, when the environmental conditions match, it is determined that the diagnosis of the air conditioning system 19 can be performed, and the process proceeds to step S108.
In step S107, after the air conditioning setting is controlled via the air conditioning system 19 so that the environmental condition of the normal vehicle state data matches the current environmental condition, the process returns to the predetermined main program.

On the other hand, in step S108, diagnosis of the air conditioning system 19 is started. That is, it is diagnosed whether there is a malfunction in the air conditioning capacity of the air conditioning system 19 or not. Specifically, a diagnosis is made as to whether the time required for the vehicle compartment temperature to reach the set temperature is within the normal range.
In step S109, it is determined whether the diagnosis of the air conditioning system 19 has ended. Here, when the diagnosis is not completed, the process returns to the predetermined main program as it is. On the other hand, when the diagnosis of the air conditioning system 19 is completed, the process proceeds to step S110.
In step S110, a command is output to the information transfer unit 18, the diagnosis result of the air conditioning system 19 is transferred to the driver, and then the control returns to the predetermined main program.
The above is the vehicle diagnostic process.

<< Operation >>
Next, the operation of the first embodiment will be described.
Normal vehicle condition data is accumulated in the external database 32 capable of data communication with vehicles, and part of the normal vehicle condition data is accumulated in the in-vehicle database 14 via data communication with the external database 32 (step S102) , S103). Then, air conditioning is performed by acquiring the current vehicle state data (step S105) and comparing the normal vehicle state data stored in the in-vehicle database 14 with the current vehicle state data acquired by the data acquisition unit 15. It diagnoses the presence or absence of malfunction in the system 19 (step S108).

  As described above, the diagnosis of the air conditioning system 19 is performed using the cloud service, so that the in-vehicle system 12 can be simplified, and efficiency can be achieved also in terms of constructing and managing the system. However, since it may be out of communication area, it is not always possible to use the cloud service. On the other hand, when all the vehicle diagnosis is performed only by the in-vehicle system 12, if it is attempted to have the same function as the cloud service, not only the cost increases but also hardware and software upgrades are difficult.

  Therefore, even in a situation where the normal vehicle condition data accumulated in the in-vehicle database 14 is insufficient, the in-vehicle system 12 can perform the minimum diagnosis. That is, when the environmental conditions of the normal vehicle state data do not match the current environmental conditions (the determination in step S106 is "No"), the setting of the air conditioning system 19 is controlled (step S107). Force current environmental conditions to match the environmental conditions of the state data. Then, if the environmental conditions match (the determination in step S106 is “Yes”), diagnosis is started (step S108). Therefore, even if the normal vehicle condition data accumulated in the in-vehicle database 14 is insufficient due to being out of the communication area (the determination in step S101 is "No"), the in-vehicle system 12 can perform the minimum diagnosis it can.

  For example, it is assumed that the current temperature is 28 degrees and the set temperature is set to 20 degrees in a state where there is normal vehicle condition data that it takes about 20 minutes to reduce the room temperature from 30 degrees to 20 degrees. . In this case, the user's operation is temporarily ignored, and control is performed via the air conditioning system 19 so that the room temperature becomes 30 degrees, and the environmental conditions are matched. Then, when the room temperature reaches 30 degrees, the set temperature is set again to 20 degrees. Then, by examining how long it takes to reduce the room temperature from 30 degrees to 20 degrees, it is diagnosed whether there is a malfunction in the air conditioning capacity of the air conditioning system 19 or not.

FIG. 5 is a time chart of the room temperature.
Normal vehicle condition data records the time required to reduce the room temperature from 30 degrees to 20 degrees, but at time t1, the room temperature is 28 degrees, so start diagnosis I can not Therefore, the room temperature is raised, for example, by stopping the cooling operation or switching to the heating operation. At time point t2, the room temperature has reached 30 degrees, so from this point on time, the cooling operation with the set temperature of 20 degrees is started. At time t3, the room temperature has reached 20 ° C., and by measuring the time from time t2 to time t3, it is possible to accurately diagnose whether the air conditioning capacity of the air conditioning system 19 is malfunctioning or not. it can.

The external database 32 has a large amount of vehicle condition data. Therefore, the on-vehicle system 12 preferentially requests from the normal vehicle condition data stored in the external database 32 the vehicles of the same type and those closer to the current environmental condition (step S102). As described above, since the vehicle type database is related to the same type of vehicle and is downloaded to the in-vehicle database 14 in preference to the one closer to the current environmental condition, the normal vehicle condition data most suitable for the current environmental condition is It can be accumulated.
Then, when the diagnosis of the air conditioning system 19 is completed (the determination in step S109 is "Yes"), the diagnosis result and, if there is a malfunction, the driver is notified of what action to take (step S110). Thereby, if there is no malfunction, the driver can be given a sense of security, and even if there is a malfunction, an early check can be promoted by guiding the action to be taken.

<< Correspondence relationship >>
The server 31 corresponds to the “server”. The processing of the data request unit 23 and step S102 correspond to the "data request unit". The in-vehicle database 14 corresponds to the "in-vehicle data storage unit". The process of the data acquisition unit 15 and step S105 corresponds to the "data acquisition unit". The processing of the vehicle diagnostic unit 21 and step S108 corresponds to the "vehicle diagnostic unit". The control unit 22 corresponds to the "control unit" in the process of step S107. The air conditioning system 19 corresponds to the "air conditioning system". The external database 32 corresponds to the "external data storage unit".

"effect"
Next, the effect of the main part in the first embodiment will be described.
(1) The vehicle diagnostic device according to the first embodiment accumulates normal vehicle condition data in the in-vehicle database 14 mounted on the vehicle, and the data acquisition unit 15 acquires current vehicle condition data. Further, the control unit 22 controls the environment setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition. Then, after the environmental condition of the normal vehicle condition data matches the current environmental condition, the vehicle diagnostic unit 21 acquires the normal vehicle condition data accumulated in the in-vehicle database 14 and the present acquired by the data acquisition unit 15 The presence or absence of a malfunction in the vehicle is diagnosed by comparing with the vehicle condition data of

  As described above, by comparing the normal vehicle state data stored in the in-vehicle database 14 with the current vehicle state data, it is possible to diagnose the presence or absence of a malfunction in the vehicle. In addition, for example, even in a situation where normal vehicle condition data run short due to being out of the communication area, the environmental conditions of the normal vehicle condition data and the current environmental conditions are matched before diagnosing the presence or absence of a malfunction. The vehicle side can perform the minimum diagnosis.

  (2) In the vehicle diagnostic apparatus according to the first embodiment, the data request unit 23 provided in the vehicle requests the external server 31 to request a part of normal vehicle state data, and the server 31 transmits the request. The normal vehicle condition data is accumulated in the in-vehicle database 14. Further, the data acquisition unit 15 acquires current vehicle state data. Further, the control unit 22 controls the environment setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition. Then, after the environmental condition of the normal vehicle condition data matches the current environmental condition, the vehicle diagnostic unit 21 acquires the normal vehicle condition data accumulated in the in-vehicle database 14 and the present acquired by the data acquisition unit 15 The presence or absence of a malfunction in the vehicle is diagnosed by comparing with the vehicle condition data of

  As described above, by comparing the normal vehicle state data stored in the in-vehicle database 14 with the current vehicle state data, it is possible to diagnose the presence or absence of a malfunction in the vehicle. In addition, for example, even in a situation where normal vehicle condition data run short due to being out of the communication area, the environmental conditions of the normal vehicle condition data and the current environmental conditions are matched before diagnosing the presence or absence of a malfunction. The vehicle side can perform the minimum diagnosis.

(3) The vehicle diagnostic device according to the first embodiment requests the vehicle related data of the same type among the normal vehicle condition data stored in the external database 32 and stores the data in the on-vehicle database 14.
As described above, by storing in the in-vehicle database 14 ones relating to vehicles of the same type, it is possible to accumulate normal vehicle condition data that is most suitable for the current environmental conditions.

(4) The vehicle diagnostic device according to the first embodiment gives priority to requests from among the normal vehicle condition data stored in the external database 32 that are closer to the current environmental conditions, and stores them in the in-vehicle database 14.
As described above, by accumulating in the on-vehicle database 14 in priority from the current environmental conditions, it is possible to accumulate normal vehicle condition data most suitable for the current environmental conditions.

(5) In the vehicle diagnostic device according to the first embodiment, the control unit 22 controls the indoor temperature of the vehicle via the air conditioning system 19, and the vehicle diagnostic unit 21 diagnoses the presence or absence of a malfunction in the air conditioning system 19.
As described above, by controlling the room temperature of the vehicle via the air conditioning system 19, it is possible to easily diagnose the presence or absence of a malfunction in the air conditioning system 19.

  (6) The vehicle diagnostic device according to the first embodiment accumulates normal vehicle condition data in the external database 32 capable of data communication with the vehicle. In addition, a part of normal vehicle condition data is accumulated in the on-vehicle database 14 mounted on the vehicle through data communication with the external database 32, and the data acquisition unit 15 acquires the current vehicle condition data. Further, the control unit 22 controls the environment setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition. Then, after the environmental condition of the normal vehicle condition data matches the current environmental condition, the vehicle diagnostic unit 21 acquires the normal vehicle condition data accumulated in the in-vehicle database 14 and the present acquired by the data acquisition unit 15 The presence or absence of a malfunction in the vehicle is diagnosed by comparing with the vehicle condition data of

  As described above, by comparing the normal vehicle state data stored in the in-vehicle database 14 with the current vehicle state data, it is possible to diagnose the presence or absence of a malfunction in the vehicle. In addition, for example, even in a situation where normal vehicle condition data run short due to being out of the communication area, the environmental conditions of the normal vehicle condition data and the current environmental conditions are matched before diagnosing the presence or absence of a malfunction. The vehicle side can perform the minimum diagnosis.

  (7) In the vehicle diagnosis method according to the first embodiment, normal vehicle state data is accumulated in the in-vehicle database 14 mounted on the vehicle, and the data acquisition unit 15 acquires current vehicle state data. Further, the control unit 22 controls the environment setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition. Then, after the environmental condition of the normal vehicle condition data matches the current environmental condition, the vehicle diagnostic unit 21 acquires the normal vehicle condition data accumulated in the in-vehicle database 14 and the present acquired by the data acquisition unit 15 The presence or absence of a malfunction in the vehicle is diagnosed by comparing with the vehicle condition data of

  As described above, by comparing the normal vehicle state data stored in the in-vehicle database 14 with the current vehicle state data, it is possible to diagnose the presence or absence of a malfunction in the vehicle. In addition, for example, even in a situation where normal vehicle condition data run short due to being out of the communication area, the environmental conditions of the normal vehicle condition data and the current environmental conditions are matched before diagnosing the presence or absence of a malfunction. The vehicle side can perform the minimum diagnosis.

Second Embodiment
"Constitution"
In the second embodiment, among the normal vehicle condition data stored in the external database 32, requests are preferentially given to those suitable for at least one of the current season and the time zone, and are stored in the in-vehicle database 14. .

Here, according to the request of the in-vehicle system 12, the data extraction unit 33 preferentially extracts from those that conform to at least one of the current season and the time zone, and transmits the information to the in-vehicle system 12. Since the second embodiment is the same as the first embodiment described above, the detailed description of the common parts will be omitted.
FIG. 6 is a table showing an example of normal vehicle state data in the external database.

The external database 32 has a large amount of vehicle condition data, and stores the vehicle condition data by type (vehicle type). And, data of indoor temperature, preset temperature, required time, sunshine intensity, outside air temperature, number of occupants, date and time when air conditioning capacity is normal are summarized.
Then, in the process of step S102, the server 31 is requested regarding vehicles of the same type and with priority to those that are close to the current environmental conditions including the season and the time zone. In response to this request, the data extraction unit 33 of the server 31 extracts the requested vehicle state data from the normal vehicle state data stored in the external database 32, and transmits the requested vehicle state data to the in-vehicle system 12.

<< Operation >>
Next, the operation of the second embodiment will be described.
The external database 32 has a large amount of vehicle condition data. Therefore, of the normal vehicle condition data stored in the external database 32, the in-vehicle system 12 relates to vehicles of the same type and is prioritized from those close to the current environmental conditions including the season and the time zone. It requests (step S102). As described above, since the vehicle type database is related to the same type of vehicle and downloaded to the in-vehicle database 14 in priority from the current environmental conditions including the season and the time zone, the most suitable to the current environmental conditions is obtained. Normal vehicle condition data can be stored.
In the second embodiment, the same effects as those of the first embodiment described above can be obtained, and detailed description will be omitted.

"effect"
Next, the effects of the main part in the second embodiment will be described.
(1) The vehicle diagnostic device according to the second embodiment prioritizes requests from those that fit in at least one of the current season and time zone, and stores them in the in-vehicle database 14.
In this way, by accumulating in the on-vehicle database 14 in preference to those that meet at least one of the current season and the time zone, it is possible to accumulate normal vehicle condition data that most conforms to the current environmental conditions. .
Although the foregoing has been described with reference to a limited number of embodiments, the scope of rights is not limited to them, and modifications of the embodiments based on the above disclosure are obvious to those skilled in the art. Moreover, each embodiment can be arbitrarily combined and employ | adopted.

11 Vehicle Diagnostic Device 12 Vehicle System 13 Network 14 Vehicle Database 15 Data Acquisition Unit 16 Communication Unit 17 Controller 18 Information Transmission Unit 19 Air Conditioning System 21 Vehicle Diagnosis Unit 22 Control Unit 23 Data Request Unit 24 Data Update Unit 31 Server 32 External Database 33 Data Extraction unit

Claims (8)

An on-vehicle data storage unit which is mounted on a vehicle and stores normal vehicle state data through communication with an external server when it is communicable ;
A data acquisition unit for acquiring current vehicle state data;
A vehicle diagnosis unit that diagnoses the presence or absence of a malfunction in the vehicle by comparing the normal vehicle condition data accumulated in the in-vehicle data accumulation unit with the current vehicle condition data acquired by the data acquisition unit;
A control unit configured to control an environment setting of the vehicle such that an environmental condition of the normal vehicle state data matches a current environmental condition;
The vehicle diagnostic unit
When communication is not possible and the normal in-vehicle data run short, the environmental condition of the normal vehicle condition data matches the current environmental condition by control of the environment setting by the control unit. A vehicle diagnostic device characterized by diagnosing. A data request unit provided in the vehicle and capable of requesting a part of the normal vehicle state data stored in the server to an external server when communication is possible ;
An on-vehicle data storage unit provided in a vehicle, which receives and stores the normal vehicle condition data transmitted from the server in response to a request from the data request unit;
A data acquisition unit for acquiring current vehicle state data;
A vehicle diagnosis unit that diagnoses the presence or absence of a malfunction in the vehicle by comparing the normal vehicle condition data accumulated in the in-vehicle data accumulation unit with the current vehicle condition data acquired by the data acquisition unit;
A control unit configured to control an environment setting of the vehicle such that an environmental condition of the normal vehicle state data matches a current environmental condition;
The vehicle diagnostic unit
When communication is not possible and the normal in-vehicle data run short, the environmental condition of the normal vehicle condition data matches the current environmental condition by control of the environment setting by the control unit. A vehicle diagnostic device characterized by diagnosing. The data request unit
The vehicle diagnostic apparatus according to claim 2, wherein among the normal vehicle condition data stored in the server, one concerning a vehicle of the same type is requested. The data request unit
The vehicle diagnostic device according to claim 2 or 3, wherein among the normal vehicle condition data stored in the server, a request is given in order from the one closer to the current environmental condition. The data request unit
The vehicle diagnostic device according to claim 4, wherein the vehicle diagnosis is prioritized from those that meet at least one of the current season and the time zone. The control unit
Control the room temperature of the vehicle through the air conditioning system,
The vehicle diagnostic unit
The vehicle diagnostic device according to any one of claims 1 to 5, wherein presence or absence of a malfunction in the air conditioning system is diagnosed. An external data storage unit that stores normal vehicle condition data and can perform data communication with the vehicle;
An on-vehicle data storage unit that stores part of the normal vehicle state data via data communication with the external data storage unit when mounted in a vehicle and capable of communication ;
A data acquisition unit for acquiring current vehicle state data;
A vehicle diagnosis unit that diagnoses the presence or absence of a malfunction in the vehicle by comparing the normal vehicle condition data accumulated in the in-vehicle data accumulation unit with the current vehicle condition data acquired by the data acquisition unit;
A control unit configured to control an environment setting of the vehicle such that an environmental condition of the normal vehicle state data matches a current environmental condition;
The vehicle diagnostic unit
When communication is not possible and the normal in-vehicle data run short, the environmental condition of the normal vehicle condition data matches the current environmental condition by control of the environment setting by the control unit. A vehicle diagnostic device characterized by diagnosing. When communication is possible, an on-vehicle data storage unit mounted on the vehicle stores normal vehicle state data through communication with an external server ,
Data acquisition unit acquires current vehicle condition data,
The control unit controls the environment setting of the vehicle such that the environmental condition of the normal vehicle condition data matches the current environmental condition,
When communication is not possible and the normal in-vehicle data run short, the environmental condition of the normal vehicle condition data matches the current environmental condition by control of the environment setting by the control unit, and the vehicle diagnosis unit A vehicle diagnostic method characterized by diagnosing the presence or absence of a malfunction in a vehicle by comparing the normal vehicle condition data stored in the vehicle data storage unit with the current vehicle condition data acquired by the data acquisition unit. .

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