JP2016215884A - Electronic control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic control device for a vehicle capable of preventing abnormality diagnosis from being performed with a sensor, an electric load and the like removed from a vehicle, preventing new abnormality information from being stored in a nonvolatile memory during performing maintenance.SOLUTION: In the electronic control device for a vehicle, if it is determined that a vehicle diagnosis device outside a vehicle is connected after abnormality information by abnormality diagnosis means is stored in a data rewritable nonvolatile memory, new abnormality information is inhibited from being stored in the nonvolatile memory even though the abnormality diagnosis means newly diagnoses that a diagnosis object has abnormality.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an in-vehicle electronic control device that diagnoses an abnormality.

  Regarding the on-vehicle electronic control device as described above, the on-vehicle electronic control device described in Patent Literature 1 and Patent Literature 2 below is known. The technique of Patent Document 1 is a technique for preventing abnormality information from being stored in a nonvolatile memory by performing abnormality diagnosis during manufacture of a vehicle. Therefore, in the technique of Patent Document 1, when all the predetermined devices are connected to the electronic control device, and it is determined by the abnormality diagnosis that all diagnosis targets are in the normal state, It is configured to allow storage of abnormality information by diagnosis in a nonvolatile memory.

  The technique of Patent Document 2 reads out abnormality information stored in a non-volatile memory. Therefore, when the electronic control device is removed from the vehicle and power is supplied to the electronic control device, many abnormalities are detected by abnormality diagnosis. This is a technique for preventing diagnosis and storage in a nonvolatile memory. Therefore, in the technique of Patent Document 2, when a multiplex communication message is received after power-on, the electronic control device is not removed from the vehicle for maintenance or the like and is normally mounted on the vehicle. It is determined that the error information is stored in the non-volatile memory.

JP 2009-36165 A JP 2007-196708 A

By the way, after the vehicle is brought into a car dealer or a repair shop due to lighting of a failure warning light, a sensor or an electric load may be removed from the vehicle in order to analyze the cause of the abnormality. At this time, if it is permitted to store new abnormality information in the nonvolatile memory, unnecessary abnormality information other than the abnormality information generated during the use of the user is stored in the nonvolatile memory, or the user uses it. In some cases, the error information that occurred inside was overwritten. Therefore, there is a problem that it becomes difficult to analyze the cause of the abnormality.
However, the techniques of Patent Document 1 and Patent Document 2 cannot cope with such a problem.

  The present invention has been made to solve the above-described problems. When maintenance is performed, an abnormality is diagnosed in a state where a sensor, an electric load, etc. are removed from the vehicle, and a new abnormality is detected. An object is to provide an in-vehicle electronic control device that can prevent information from being stored in a nonvolatile memory.

  An in-vehicle electronic control device according to the present invention includes a nonvolatile memory capable of rewriting data, an abnormality diagnosis means for diagnosing an abnormality for a diagnosis target based on information from an electronic device mounted on the vehicle, An abnormality storage means for storing, in the nonvolatile memory, abnormality information that is information related to a diagnosis result of the diagnosis object diagnosed as an abnormality when the diagnosis object is diagnosed as an abnormality by the abnormality diagnosis means; An external connection means that is connected to an external vehicle diagnosis apparatus so as to be able to perform data communication and performs data communication with respect to information relating to an abnormality diagnosis. After storing the abnormality information in the non-volatile memory, when it is determined that the vehicle diagnosis apparatus is connected to the external connection unit, the diagnosis target is newly set by the abnormality diagnosis unit. Be diagnosed as normal, it is to prohibit the storing of new the abnormality information in the non-volatile memory.

  After a vehicle is brought into a card dealer or repair shop, usually a vehicle diagnostic device outside the vehicle is first connected to an electronic control device and stored in a non-volatile memory by the vehicle diagnostic device. The abnormal information is confirmed. According to the on-vehicle electronic control device according to the present invention, new abnormality information can be prohibited from being stored in the nonvolatile memory when the vehicle diagnostic device is connected. In other words, at the initial stage of maintenance, new abnormality information can be automatically and reliably prohibited from being stored in the nonvolatile memory, and in the subsequent maintenance such as analysis of the cause of abnormality, the new abnormality information is non-volatile. It can be prevented from being stored in the memory. Therefore, during maintenance, it is possible to prevent unnecessary abnormality information from being stored in the nonvolatile memory other than the abnormality information that occurred during the use of the user, and the abnormality information that occurred during the use of the user It can be prevented from being overwritten. Therefore, it is possible to prevent the cause of the abnormality from being difficult to analyze during maintenance.

It is a block diagram of the vehicle-mounted electronic control apparatus which concerns on Embodiment 1 of this invention. It is a hardware block diagram of the vehicle-mounted electronic control apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process of the vehicle-mounted electronic control apparatus which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process of the vehicle-mounted electronic control apparatus which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
A vehicle-mounted electronic control device 1 (hereinafter simply referred to as an electronic control device 1) according to Embodiment 1 will be described with reference to the drawings. FIG. 1 is a block diagram related to the electronic control device 1, FIG. 2 is a hardware configuration diagram related to the electronic control device 1, and FIGS. 3 and 4 are flowcharts illustrating processing of the electronic control device 1. .

  As shown in FIG. 1, the electronic control device 1 includes a nonvolatile memory 2 capable of rewriting data, an abnormality diagnosis unit 10, an abnormality storage unit 11, and an external connection unit 12. The abnormality diagnosis unit 10 diagnoses an abnormality of the diagnosis target 6 based on information from an electronic device 4 mounted on the vehicle 5 (hereinafter referred to as an in-vehicle electronic device 4). When the diagnosis target 6 is diagnosed as abnormal by the abnormality diagnosis unit 10, the abnormality storage unit 11 stores abnormality information, which is information related to the diagnosis result of the diagnosis target 6 diagnosed as the abnormality, in the nonvolatile memory 2. . The external connection means 12 is connected to the vehicle diagnosis device 30 outside the vehicle 5 so as to be able to perform data communication, and performs data communication regarding information related to abnormality diagnosis. In such a configuration, the abnormality storage unit 11 stores the abnormality information in the non-volatile memory 2 and then determines that the vehicle diagnosis apparatus 30 is connected to the external connection unit 12, so that the abnormality diagnosis unit 10 performs diagnosis 6 Even if a new abnormality is diagnosed, the permission switching process for prohibiting the storage of new abnormality information in the nonvolatile memory 2 is performed.

  Each function of the abnormality diagnosis means 10, the abnormality storage means 11, the external connection means 12, and the like of the electronic control device 1 is realized by a processing circuit provided in the electronic control device 1. Specifically, as shown in FIG. 2, the electronic control device 1 includes, as a processing circuit, an arithmetic processing device 15 (computer) such as a CPU (Central Processing Unit), and a storage device 14 that exchanges data with the arithmetic processing device 15. An input interface circuit 16 for inputting external information to the arithmetic processing unit 15 (hereinafter simply referred to as the input circuit 16), and an output interface circuit 20 for outputting a signal from the arithmetic processing unit 15 to the outside (hereinafter simply referred to as the output circuit 20). And a communication circuit 21 and the like.

  As the storage device 14, the electronic control device 1 includes a RAM 18 (Random Access Memory) configured to be able to read and write data from the arithmetic processing device 15, and a ROM 17 (configured to be able to read data from the arithmetic processing device 15). Read only memory) and a nonvolatile memory 2 such as a nonvolatile EEPROM (Electrically Erasable Programmable Read-Only Memory) that can read and write data from the arithmetic processing unit 15 are provided. The input circuit 16 is connected to an in-vehicle electronic device 4 such as various sensors 25 and includes an A / D converter that inputs an electric signal of the in-vehicle electronic device 4 to the arithmetic processing device 15. The output circuit 20 is connected to in-vehicle electronic devices 4 such as various electric loads 26 and includes a drive circuit that outputs electric signals such as control signals and drive currents to these in-vehicle electronic devices 4.

  The communication circuit 21 is connected to other vehicle-mounted electronic control devices and information terminal devices such as the navigation device 24 and information terminal devices outside the vehicle 5 such as the vehicle diagnostic device 30 via the communication line 27. Wired communication is performed based on a communication protocol such as CAN (Controller Area Network). The vehicle diagnostic device 30 is detachably connected to the communication line 27 via connectors 22 and 23. Note that the communication circuit 21 may be connected to the vehicle diagnostic device 30 and the like so as to be able to perform data communication by wireless communication.

  The functions of the abnormality diagnosis unit 10, the abnormality storage unit 11, and the external connection unit 12 of the electronic control device 1 are the same as the software stored in the storage device 14 such as the ROM 17 and the nonvolatile memory 2 ( The program is implemented by cooperating with other hardware of the electronic control device 1 such as the storage device 14, the input circuit 16, the output circuit 20, and the communication circuit 21.

  The electronic control device 1 is an electronic control device mounted on the vehicle 5, and is an electronic control device for an internal combustion engine, an electronic control device for a transmission, an electronic control device for a brake, an electronic control device for a meter, An electronic control device, an electronic control device for an air conditioner, or the like is used. In the present embodiment, a case where the electronic control device 1 is an electronic control device for an internal combustion engine will be described as an example.

  The electronic control device 1 is connected to various on-vehicle electronic devices 4 via an input circuit 16, an output circuit 20, and a communication circuit 21 so as to be able to transmit electrical signals. In the present embodiment, the vehicle-mounted electronic device 4 such as a sensor 25 or a switch connected to the input circuit 16 includes an intake air amount sensor, a rotation speed sensor such as a crank angle sensor, a throttle position sensor, a water temperature sensor, An oxygen sensor, a vehicle speed sensor, an ignition switch, and the like are provided. The in-vehicle electronic device 4 such as the electric load 26 connected to the output circuit 20 includes an ignition coil, a solenoid valve for a fuel injector, a solenoid valve for a variable valve timing mechanism, a drive motor for an electronic control throttle, and a fuel pump. A drive motor, an oxygen sensor heater, a failure warning light, and the like are provided.

  The abnormality diagnosis means 10 performs an abnormality diagnosis process for the diagnosis target 6 based on the information from the in-vehicle electronic device 4. The diagnosis target 6 includes the in-vehicle electronic device 4 itself such as the sensor 25 and the electric load 26 and the mechanical in-vehicle device 7 capable of diagnosing abnormality indirectly or directly based on information from the in-vehicle electronic device 4. It is. The abnormality of the sensor 25 includes failure of the sensor 25, characteristic fluctuation, ground fault, power fault, disconnection, etc. of the connection line of the sensor 25. The abnormality of the electric load 26 includes a failure of the actuator, a characteristic variation such as responsiveness, and the like. Abnormalities in the mechanical on-vehicle equipment 7 include deterioration of the catalyst provided in the exhaust pipe of the internal combustion engine, holes formed in the intake manifold and the fuel tank, and sticking of various valves. The abnormality diagnosis performed by the abnormality diagnosis means 10 includes various types of failure diagnosis in so-called OBD (On Board Diagnostic).

  The abnormality diagnosis unit 10 diagnoses an abnormality when the ignition switch of the vehicle 5 is turned on and power is supplied to the electronic control device 1 and the vehicle-mounted electronic device 4. Further, the abnormality diagnosis unit 10 diagnoses an abnormality for the diagnosis target 6 for which the diagnosis execution condition is satisfied when a diagnosis execution condition set in advance for each diagnosis target 6 is satisfied. The abnormality diagnosis means 10 passively monitors the output signal of the sensor 25 to diagnose abnormality, and actively controls the electric load 26 such as an actuator for the diagnosis, and outputs the output signal of the sensor 25 at that time. Monitor to diagnose abnormalities.

  When the diagnosis target 6 is the sensor 25, the abnormality diagnosis unit 10 determines, for example, whether the output value of each sensor 25 is within a normal range predetermined for each sensor 25, and is within the normal range. If there is, it is diagnosed that the sensor 25 of the diagnosis target 6 is normal, and if it is outside the normal range, it is diagnosed that the sensor 25 of the diagnosis target 6 is abnormal.

  Further, when the diagnosis target 6 is an electric load 26 such as an actuator, the abnormality diagnosis unit 10 outputs, for example, a control signal of the electronic control device 1 for the electric load 26 and an output of the sensor 25 that detects the state of the electric load 26. From the relationship with the signal, it is diagnosed whether the electrical load 26 of the diagnosis target 6 is normal or abnormal. For example, if the electric load 26 does not change to the predetermined state even though the control signal for changing the electric load 26 to the predetermined state is given, it is diagnosed that the electric load 26 is abnormal.

  Further, when the diagnosis target 6 is a mechanical in-vehicle device 7, the abnormality diagnosis unit 10, for example, controls the control signal of the electronic control device 1 for the electric load 26 that affects the mechanical in-vehicle device 7, and mechanical Based on one or both of the output signals of the sensor 25 capable of indirectly or directly detecting the state of the in-vehicle device 7, it is diagnosed whether the mechanical in-vehicle device 7 of the diagnosis target 6 is normal or abnormal. For example, if the output signal of the sensor 25 is a value indicating that the state of the mechanical in-vehicle device 7 is abnormal even though a normal control signal is given to the electric load 26, the mechanical load Diagnose that the in-vehicle device 7 is abnormal.

  When the abnormality diagnosis unit 10 diagnoses an abnormality, the abnormality diagnosis unit 10 stores abnormality information related to a diagnosis result such as an identification code of the diagnosis target 6 diagnosed as an abnormality and an identification code indicating the type of abnormality in a volatile memory such as the RAM 18. To do. In addition, the abnormality diagnosis means 10 uses the time series data of the output signal of the sensor 25 and the control signal of the electric load 26 when diagnosing an abnormality as volatile memory such as the RAM 18 as abnormality information related to the diagnosis result. You may comprise so that it may memorize | store.

  When the diagnosis target 6 is diagnosed as abnormal by the abnormality diagnosis unit 10, the abnormality storage unit 11 stores abnormality information, which is information related to the diagnosis result of the diagnosis target 6 diagnosed as the abnormality, in the nonvolatile memory 2. . The abnormality storage unit 11 is configured to copy and store abnormality information stored in the volatile memory in the nonvolatile memory 2. In addition, the abnormality storage unit 11 has a request for deletion when there is a request from the vehicle diagnosis apparatus 30 connected to the external connection unit 12 to delete the abnormality information stored in the nonvolatile memory 2. The abnormality information is configured to be erased from the nonvolatile memory 2.

  The nonvolatile memory 2 is a nonvolatile storage device that can rewrite data and retains memory without supplying power. As the nonvolatile memory 2, a flash memory or the like can be used in addition to the EEPROM. Note that a volatile memory is a memory whose memory is erased when power is not supplied.

  The external connection means 12 is connected to the vehicle diagnosis device 30 outside the vehicle 5 so as to be able to perform data communication, and performs data communication regarding information related to abnormality diagnosis. In the present embodiment, on the vehicle 5 side, a communication line 27 connected to the communication circuit 21 is provided with a vehicle-side connector 22 for connecting to an information terminal device outside the vehicle 5. Further, the connector 23 of the vehicle diagnostic device 30 is connected, and the electronic control device 1 and the vehicle diagnostic device 30 are connected via the communication line 27. When the external connection means 12 receives an identification signal of the vehicle diagnostic device 30 from the vehicle diagnostic device 30, it connects to the vehicle diagnostic device 30 so that data communication is possible.

  The vehicle diagnosis device 30 is an information terminal device outside the vehicle 5 that is not normally mounted on the vehicle 5, and performs data communication with the electronic control device 1 on information related to abnormality diagnosis. The vehicle diagnostic device 30 requests the electronic control device 1 to receive abnormality information stored in the nonvolatile memory 2 or the volatile memory as information related to abnormality diagnosis for data communication, 2 is requested to the electronic control device 1 side, or real-time information such as an output signal of a specific sensor 25 or a control signal of the electric load 26 is transmitted to the electronic control device 1 side. Request and receive. Information exchange between the vehicle diagnostic device 30 and the electronic control device 1 is performed in accordance with the OBD standard or the like.

  The vehicle diagnostic device 30 is used to check the content of the abnormality and perform maintenance of the vehicle 5 or the like. The vehicle diagnostic device 30 is usually provided in a car dealer or a repair shop. When the failure warning light is turned on, when failure information is displayed on the instrument panel display, or when the user feels an abnormality in the vehicle 5 such as the internal combustion engine or the transmission, the vehicle 5 Or brought into a repair shop, and the vehicle diagnostic device 30 is connected to the vehicle 5 side. The vehicle diagnostic device 30 is a dedicated portable information terminal device including a microcomputer and a display device (display), or a personal computer in which a maintenance program is installed and a communication device such as CAN is provided. Or

  After the vehicle 5 was brought into a card dealer or repair shop, the vehicle-mounted electronic device 4 such as the sensor 25 and the electric load 26 and the mechanical vehicle-mounted device 7 were removed from the vehicle 5 in order to analyze the cause of the abnormality. In some cases, the abnormality diagnosis unit 10 may diagnose an abnormality and the vehicle diagnosis apparatus 30 may check the diagnosis result. At this time, if new abnormality information is permitted to be stored in the nonvolatile memory 2 by the abnormality storage means 11, unnecessary abnormality information other than the abnormality information generated during use by the user is stored in the nonvolatile memory 2. Or abnormal information generated during use by the user is overwritten. Therefore, there is a problem that it becomes difficult to analyze the cause of the abnormality in maintenance.

  Therefore, when the abnormality storage unit 11 stores the abnormality information in the nonvolatile memory 2 and determines that the vehicle diagnosis apparatus 30 is connected to the external connection unit 12, the abnormality diagnosis unit 10 newly sets the diagnosis target 6 to be abnormal. Even if it is diagnosed, the permission switching process for prohibiting the storage of new abnormality information in the nonvolatile memory 2 is performed.

  After the vehicle 5 is brought into a card dealer or repair shop, usually, the vehicle diagnostic device 30 is first connected to the electronic control device 1 in order to confirm the abnormal state, and the vehicle diagnostic device 30 stores it in the nonvolatile memory 2. The stored abnormality information is confirmed. According to said structure, it can prohibit that new abnormality information is memorize | stored in the non-volatile memory 2 in the step where this vehicle diagnostic apparatus 30 was connected. That is, at the initial stage of maintenance, new abnormality information can be automatically and reliably prohibited from being stored in the nonvolatile memory 2, and new abnormality information can be stored in subsequent maintenance such as analysis of the cause of the abnormality. It can be prevented from being stored in the nonvolatile memory 2. Therefore, during maintenance, it is possible to prevent unnecessary abnormality information from being stored in the nonvolatile memory 2 other than the abnormality information generated during use by the user, and the abnormality information generated during use by the user is overwritten. Can be prevented. Therefore, it is possible to prevent the cause of the abnormality from being difficult to analyze during maintenance.

  In the present embodiment, the abnormality diagnosis unit 10 performs abnormality diagnosis even when it is determined that the vehicle diagnosis apparatus 30 is connected to the external connection unit 12 after storing the abnormality information in the nonvolatile memory 2. It is configured as follows. According to this configuration, the diagnosis result by the abnormality diagnosis means 10 can be confirmed by the vehicle diagnostic device 30 even during maintenance, and confirmation that the abnormality has been solved and analysis of the cause of the abnormality can be performed. it can.

  The abnormality storage means 11 receives abnormality information from the nonvolatile memory 2 when receiving a request from the vehicle diagnosis apparatus 30 connected to the external connection means 12 to delete the abnormality information stored in the nonvolatile memory 2. While deleting, it is comprised so that new abnormality information may be memorize | stored in the non-volatile memory 2. FIG. When the maintenance is completed or in order to finally confirm that the abnormality has been resolved, the vehicle diagnostic device 30 may erase the abnormality information stored in the nonvolatile memory 2. At this time, according to the above configuration, the prohibition of storing new abnormality information in the nonvolatile memory 2 can be automatically canceled and permitted. Therefore, after the maintenance is completed, the information of the diagnosis result by the abnormality diagnosis means 10 during use by the user can be surely stored in the nonvolatile memory 2.

  The abnormality storage means 11 is configured to store in the nonvolatile memory 2 information (in this example, a storage permission flag, which will be described later) that prohibits or permits storage of abnormality information in the nonvolatile memory 2. ing. According to this configuration, even if the connection between the electronic control device 1 and the battery is canceled or the electronic control device 1 is removed from the vehicle 5 due to maintenance, the prohibition or permission information of abnormal information is deleted. And the permission switching process can be executed normally.

  The processes of the abnormality diagnosis unit 10, the abnormality storage unit 11, and the external connection unit 12 described above can be configured as shown in the flowcharts of FIGS. The processing of the flowcharts of FIGS. 3 and 4 is executed at regular intervals, for example, when the arithmetic processing device 15 executes software (program) stored in the storage device 14.

  A flowchart relating to the abnormality diagnosis process and the abnormality storage process of FIG. 3 will be described. First, in step S110, the abnormality diagnosis unit 10 performs an abnormality diagnosis process on the diagnosis target 6 based on the information from the in-vehicle electronic device 4 as described above.

  Next, in step S120, the abnormality storage unit 11 determines whether or not the diagnosis target 6 is diagnosed as abnormal by the abnormality diagnosis unit 10, and when there is no diagnosis target 6 diagnosed as abnormal (step S120: No). Ends the process of the flowchart of FIG. On the other hand, when there is a diagnosis object 6 diagnosed as abnormal (step S120: Yes), the abnormality storage unit 11 determines whether or not the storage permission flag for the nonvolatile memory 2 is set in step S130. . Here, the storage permission flag is information stored in the storage device 14 that indicates permission or prohibition of storage of abnormality information in the nonvolatile memory 2. When the storage permission flag is set (for example, when the storage permission flag is set to 1), it indicates that storage of abnormal information in the nonvolatile memory 2 is permitted, and the storage permission flag is set. When it is not (cleared) (for example, when the storage permission flag is set to 0), it indicates that storage of abnormality information in the nonvolatile memory 2 is prohibited. The storage permission flag is set or cleared in the process of the flowchart of FIG. The storage permission flag is configured to be stored in the nonvolatile memory 2.

  When the abnormality storage unit 11 determines that the storage permission flag is not set (cleared) (step S130: No), the abnormality storage unit 11 does not store the abnormality information by the abnormality diagnosis unit 10 in the nonvolatile memory 2, The process of the flowchart of FIG. On the other hand, if the abnormality storage means 11 determines that the storage permission flag is set (step S130: Yes), the process proceeds to step S140, and after storing the abnormality information by the abnormality diagnosis means 10 in the nonvolatile memory 2, The process of the flowchart of FIG.

  Next, a flowchart according to the permission switching process of FIG. 4 will be described. First, in step S310, the external connection unit 12 determines whether or not it is connected to the vehicle diagnostic apparatus 30 so as to be able to perform data communication, as described above. In the present embodiment, the external connection unit 12 is configured to determine that it is connected to the electronic control unit 1 so as to be able to perform data communication when the identification signal of the vehicle diagnostic device 30 is received. The external connection means 12 performs data communication with the vehicle diagnosis apparatus 30 on information related to abnormality diagnosis when the vehicle diagnosis apparatus 30 is connected so as to be capable of data communication.

  If it is determined that the vehicle diagnostic apparatus 30 is not connected to the external connection unit 12 (No at Step S310), the abnormality storage unit 11 ends the process of the flowchart of FIG. On the other hand, when it is determined that the vehicle diagnostic apparatus 30 is connected to the external connection unit 12 (step S310: Yes), the abnormality storage unit 11 sets a storage permission flag to the nonvolatile memory 2 in step S320. It is determined whether it is set. When it is determined that the storage permission flag is set (step S320: Yes), the abnormality storage unit 11 determines whether abnormality information is stored in the nonvolatile memory 2 in step S330. If the abnormality storage means 11 determines that the abnormality information is stored in the nonvolatile memory 2 (step S330: Yes), the abnormality storage means 11 clears the storage permission flag (sets the storage permission flag to 0) in step S340. ) And storing new abnormality information in the nonvolatile memory 2 is prohibited. On the other hand, the abnormality storage unit 11 determines that the storage permission flag is not set (cleared) (step S320: No), or determines that the abnormality information is not stored in the nonvolatile memory 2. In step S330: No, the process proceeds to step S350.

  In step S350, the abnormality storage unit 11 determines whether or not a request for deleting the abnormality information stored in the nonvolatile memory 2 has been received from the vehicle diagnosis apparatus 30 connected to the external connection unit 12. When the abnormality storage unit 11 has not received a request to delete the abnormality information (step S350: No), the abnormality storage unit 11 ends the process of the flowchart of FIG. On the other hand, when the abnormality storage unit 11 has received a request to delete the abnormality information (step S350: Yes), the abnormality storage unit 11 deletes the abnormality information from the nonvolatile memory 2 in step S360, and in step S370, the storage permission flag. Is set (1 is set to the storage permission flag) and new abnormality information is permitted to be stored in the nonvolatile memory 2, and then the processing of the flowchart of FIG.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  The present invention can be suitably used for a vehicle-mounted electronic control device that diagnoses an abnormality.

1: vehicle-mounted electronic control device (electronic control device), 2: non-volatile memory, 4: electronic device (vehicle-mounted electronic device), 5: vehicle, 6: diagnosis target, 10: abnormality diagnosis means, 11: abnormality storage means , 12: external connection means, 14: storage device, 15: arithmetic processing device (computer), 21: communication circuit, 22, 23: connector, 27: communication line, 30: vehicle diagnostic device

Claims (2)

Non-volatile memory that can rewrite data,
An abnormality diagnosing means for diagnosing an abnormality for a diagnosis object based on information from an electronic device mounted on the vehicle;
When the diagnosis object is diagnosed as abnormal by the abnormality diagnosis means, abnormality storage means for storing abnormality information that is information related to a diagnosis result of the diagnosis object diagnosed as the abnormality in the nonvolatile memory;
An in-vehicle electronic control device comprising an external connection means connected to a vehicle diagnostic device outside the vehicle so as to be capable of data communication, and performing data communication for information relating to abnormality diagnosis,
The abnormality storage means stores the abnormality information in the nonvolatile memory, and then determines that the diagnosis target is newly abnormal by the abnormality diagnosis means when it is determined that the vehicle diagnosis apparatus is connected to the external connection means. A vehicle-mounted electronic control device that prohibits storing new abnormality information in the nonvolatile memory even if diagnosed.   The abnormality storage means receives the abnormality from the nonvolatile memory when receiving a request from the vehicle diagnostic apparatus connected to the external connection means to delete the abnormality information stored in the nonvolatile memory. The in-vehicle electronic control device according to claim 1, wherein the vehicle-mounted electronic control device permits erasure of information and storage of the new abnormality information in the nonvolatile memory.

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