JP5643058B2 - Vehicle fault diagnosis control device - Google Patents

Description

The present invention relates to a vehicle failure diagnosis control device , and more particularly to a vehicle equipped with a plurality of electronic control devices connected in a communicable manner via a diagnosis tester prepared by each car manufacturer. about the failure diagnosis control apparatus for a vehicle which performs the service.

  In recent years, computerization of vehicle control has progressed, and a plurality of electronic control units (hereinafter referred to as “ECUs”) are mounted on a single vehicle so as to be communicably connected. In addition, dealers that provide vehicle sales and after-sales services have various fault diagnosis services that identify vehicle fault locations and obtain information such as market history and learning information through diagnostic testers prepared by each car manufacturer. It is done with ECU. In addition, by using this diagnostic tester, it is possible to rewrite the program of each ECU (hereinafter referred to as “repro”).

  In the conventional vehicle failure diagnosis control apparatus 10 ′, as shown in FIG. 5, all ECUs 1 ′ and 2 ′ mounted on the vehicle are provided with a failure diagnosis service function and a repro function by a tester. Communication between the ECUs 1 ′ and 2 ′ has been performed, and a fault diagnosis service and program rewriting have been performed.

  Here, as a system for efficiently rewriting an ECU program via a vehicle communication line, a program rewriting system disclosed in Patent Document 1 can be cited. This program rewriting system stops the communication between the ECUs that are not subject to repromotion and the ECUs that cannot be repromoted among the ECUs installed in the vehicle, and establishes communication only with the ECUs that are not subject to repromotion, thereby effectively rewriting the program. Is to do.

JP 2009-286191 A

  However, in recent years, the capacity of non-volatile memory that can be mounted in each ECU is limited due to the reduction in the cost and weight of the vehicle, and the reduction in cost, weight, and size of each part. Reduction of development man-hours is desired. For this reason, some ECUs may not have a failure diagnosis service function.

The present invention has been made in view of the above points, and its object is to provide a fault diagnosis service function of an ECU that cannot be provided with a fault diagnosis service function. In addition, it is an object of the present invention to provide a vehicle fault diagnosis control device that enables both ECUs to be re-proposed with a diagnostic tester.

To solve the problem of the, Oite failure diagnosis control apparatus for a vehicle of the present invention, the failure diagnostic service function failure diagnosis service functions of the ECU which is not provided with, has already been equipped with a fault diagnosis service functions ECU Replace with Furthermore, in order to enable the repro of both ECUs in the diagnostic tester, for example, by special vehicle operation, it is determined whether the repro of the ECU not equipped with the function or the repro of the ECU equipped with the function, If it is determined that the ECU is not equipped with the above function, the ECU that does not have the function impersonates the ECU with the function and communicates with the diagnostic tester, so that the function is ECU repro that is not provided is possible.

Furthermore, Oite failure diagnosis control apparatus for a vehicle of the present invention, when the ECU fault diagnosis service functions had a substitute the function of the ECU which is not provided with communication with the diagnostic tester is stopped by failure or the like Replaces the function of an ECU that does not have the function with another ECU that has the function. In addition, when reproducing an ECU that does not have the function, the ECU that does not have the function impersonates the ECU that has stopped communicating with the diagnostic tester and communicates with the diagnostic tester, thereby ECU repro that is not equipped with can be made.

  As can be understood from the above description, according to the present invention, there is a restriction on the capacity of the nonvolatile memory that can be mounted and the development man-hours, and even when an ECU that cannot be equipped with the failure diagnosis service function is mounted, It is possible to re-promote with the fault diagnosis service and diagnostic tester.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is the figure explaining one Example of the failure diagnosis control apparatus of this invention, (a) is a block diagram explaining communication between ECU, (b) is a block diagram at the time of a failure diagnosis service, (c) is The block diagram at the time of program rewriting. The flowchart explaining the program rewriting by the diagnostic tester of the failure diagnosis control of this invention. It is the figure explaining the other Example of the failure diagnosis control apparatus of this invention, (a) is a block diagram explaining communication between ECU, (b) is a block diagram at the time of a failure diagnosis service, (c) Is a block diagram when rewriting the program. The flowchart explaining the other program rewriting by the diagnostic tester of the failure diagnosis control of this invention. The block diagram explaining communication of the diagnostic tester and each ECU by a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[Example 1]
FIG. 1 is a first embodiment of a failure diagnosis control apparatus according to the present invention. In this first embodiment, an ECU (hereinafter referred to as “EOP”) of an electric oil pump for an automatic transmission (hereinafter referred to as “AT”) An ECU that does not have a failure diagnosis service function, and an ECU of an AT (hereinafter referred to as “ATCU”) is an ECU that has a failure diagnosis service function and can replace the failure diagnosis service function of the EOP.

  FIG. 1A is a block diagram illustrating communication between ECUs, FIG. 1B is a block diagram illustrating a failure diagnosis service, and FIG. 1C is a block diagram illustrating repro.

  As shown in FIG. 1A, the failure diagnosis control device 10 includes at least an ATCU 1 and an EOP 2, and is communicably connected to the diagnosis tester 5 via the communication switching unit 4. The communication switching means 4 may be in a form provided in the failure diagnosis control apparatus 10 or in a form provided in the diagnostic tester 5. Here, ATCU1 and EOP2 are connected by a control area network (hereinafter referred to as “CAN”), and both communicate with each other using CAN ID.aaa. Further, the ATCU 1 includes repro target determination means 6 that can determine a repro target ECU that is a repro of ATCU1 or a repro of EOP2.

  When the vehicle is brought into a dealer or the like and the diagnostic tester 5 is connected to the vehicle fault diagnosis control device 10, the diagnostic tester 5 and the ATCU 1 are connected to each other with CAN ID.bbb and CAN ID. By performing mutual communication with ccc, a service request from the diagnostic tester 5 and market history, learning information, etc. stored in the ATCU 1 are exchanged.

  In the first embodiment, since the EOP 2 is not provided with a failure diagnosis service function, information such as market history and learning information of the EOP 2 cannot be directly transmitted to the diagnostic tester 5. Therefore, in order to replace the failure diagnosis service function of EOP2 with ATCU1, EOP2 transmits information necessary for the failure diagnosis service to ATCU1 using CAN ID.aaa. Here, when it is necessary to store the EOP2 market history and learning information in order to realize the EOP2 fault diagnosis service, the information stored in EOP2 is transferred to ATCU1 using CAN ID.aaa. This information can be stored in the ATCU 1 in advance. As a result, EOP2 does not require a nonvolatile memory for failure diagnosis service such as EEPROM, and the manufacturing cost of EOP2 can be reduced.

  When performing a failure diagnosis service for EOP2, CAN ID.bbb and CAN ID.ccc used for communication between diagnostic tester 5 and ATCU1 are used, and diagnostic tester 5 is connected between diagnostic tester 5 and ATCU1. By exchanging diagnostic information such as the service request from the EOP2, the market history of EOP2 stored in the ATCU1, and learning information, the failure diagnostic service function of the EOP2 can be replaced by the ATCU1. As described above, the EOP2 failure diagnosis service can be performed only by defining the allocation for EOP2 in the information transmitted from the ATCU 1 to the diagnostic tester 5 without changing the diagnostic tester 5 side.

  Next, FIG. 1C illustrates the repro of EOP2 by the diagnostic tester 5. In order to realize this repro function, EOP2 needs to have a repro function that makes the communication interface equivalent to ATCU1. Furthermore, if this predetermined operation is performed by a special operation such as a shift operation, for example, an operation of changing the transmission range from P → N → R → N → P 10 times, EOP2 is not reproduced. In some cases, as in the case of ATCU1 repro, switching logic that can determine whether it is ATCU1 repro or EOP2 repro is provided in both ATCU1 and EOP2. When the repro target determining means 6 having the switching logic determines that it is a repro of EOP2, the determination information is transmitted from the ATCU 1 to the EOP 2, and the communication switching means 4 transmits the diagnosis tester 5 and the ATCU 1 to each other. The communication is prohibited, the communication between the diagnostic tester 5 and EOP2 is permitted, and the repro of EOP2 becomes possible.

  FIG. 2 illustrates a specific control flow of repro by the diagnostic tester in the first embodiment.

  First, the ATCU 1 side determines whether or not it is a repro of EOP2 by a special shift operation or the like as described above (S101). At that time, communication with the diagnostic tester 5 is permitted on the ATCU 1 side and prohibited on the EOP 2 side. And if it determines with it not being EOP2 repro mode by the said determination (S101), the present communication state will be continued. On the other hand, when it is determined that the EOP repro mode is determined in the determination (S101), the determination information is transmitted from ATCU1 to EOP2 using CAN ID.aa2 of a communication line different from CAN ID.aaa, for example. (S102). When the EOP2 repro determination information is received on the EOP2 side and it is determined that it is in the EOP2 repro mode (S103), communication with the diagnostic tester 5 in the prohibited state is permitted (S104), and the ATCU1 side permits. Communication with the diagnostic tester 5 is prohibited (S105).

  As a result, even if EOP2 cannot normally communicate directly with diagnostic tester 5 because it does not have a failure diagnosis service function, EOP2 is replaced by ATCU1 instead of ATCU1 if a special shift operation is performed. As a result, it is possible to communicate with the diagnostic tester and re-promote EOP2. If no special shift operation is performed, ATCU1 can be reproposed as usual.

[Example 2]
FIG. 3 shows a second embodiment of the failure diagnosis control apparatus according to the present invention. In the second embodiment, when the ATCU in the first embodiment stops communication with the diagnostic tester due to a failure or the like, another ECU becomes the ATCU. Instead, it is a system that replaces the EOP fault diagnosis service function. Here, ECUs that can replace the EOP failure diagnosis service function instead of ATCU are already equipped with a failure diagnosis service function, an engine ECU (hereinafter referred to as “ECM”) and a brake ECU (hereinafter referred to as “ECM”). "BCM") can be applied. In the second embodiment, a case where the ECM is used for replacement will be described.

  3A is a block diagram illustrating communication between ECUs, FIG. 3B is a block diagram illustrating a failure diagnosis service, and FIG. 3C is a block diagram illustrating repro.

  As shown in FIG. 3A, the failure diagnosis control device 20 includes at least an ATCU 11, an EOP 12, and an ECM 13, and is communicably connected to the diagnosis tester 15 via the communication switching unit 14. ATCU11, EOP12, and ECM13 are connected by CAN, and they communicate with each other by CAN ID.aaa. Further, the ECM 13 includes a repro target determination unit 16 ′ that can determine a repro target ECU similar to the repro target determination unit 16 of the ATCU 11, and a stop determination unit 17 that can determine a communication stop state between the diagnostic tester 15 and the ATCU 11. ing. Note that the stop determination means can be provided not only in the ECM 13 but also in other ECUs, such as a stop determination means for determining a stop state of communication between the diagnostic tester 15 and the ECM 13.

  As shown in FIG. 3B, also in the second embodiment, since the EOP 12 is not provided with a failure diagnosis service function, information such as the market history and learning information of the EOP 12 is directly transmitted to the diagnostic tester 15. I can't. Therefore, when communication with the diagnostic tester 15 is stopped due to a failure or the like of the ATCU 11, the CAN ID.aaa can also be received by the ECM 13 so that the ECM 13 can replace the failure diagnosis service function of the EOP 12. Information necessary for the failure diagnosis service of EOP12 is transmitted to ECM13 using CAN ID.aaa. In addition, when it is necessary to store the EOP12 market history and learning information in order to realize the fault diagnosis service, the information to be stored in EOP12 is also received by ECM13 via CAN ID.aaa. These pieces of information are stored in the ECM 13.

  In this case, the diagnostic tester 15 and the ECM 13 communicate with each other using CAN ID.ddd and CAN ID.eee, and exchange service requests from the diagnostic tester 15, market history, learning information, and the like stored in the ECM 13. Is.

  As described above, when the failure diagnosis service of the EOP 12 is performed when the ATCU 11 is normal, the diagnosis tester 15 and the ATCU 11 communicate with each other using CAN ID.bbb and CAN ID.ccc, and a service request from the diagnosis tester 15 It is possible to exchange the EOP 12 market history and learning information diagnostic information stored in the ATCU 11. However, as shown in FIG. 3B, when the communication between the diagnostic tester 15 and the ATCU 11 is stopped due to the failure of the ATCU 11 or the like, this is detected by the stop determination means 17 on the ECM 13 side, and the ECM 13 performs the diagnosis. Using CAN ID.ddd and CAN ID.eee used for communication with the tester 15, service information from the diagnostic tester 15, diagnostic information such as the EOP 12 market history and learning information stored in the ECM 13 Exchange. As a result, the failure diagnosis service function of the EOP 12 can be replaced by the ECM 13, and only the EOP 12 assignment is defined in the information transmitted from the ECM 13 to the diagnosis tester 15 without changing the diagnosis tester 15 side. It is possible to provide a fault diagnosis service.

  Next, FIG. 3C illustrates the repro of the EOP 12 by the diagnostic tester 15 when the ATCU 11 fails. In order to realize this repro function, the EOP 12 needs to have a repro function having a communication interface equivalent to that of the ATCU 11. Further, a switching logic for determining whether or not the EOP 12 is reproducible by a special operation such as a shift operation, which can be determined by the repro target determining means 16 ′ on the ECM 13 side even when the ATCU 11 fails, is also provided in the ECM 13. As will be described later, the repro target determination unit 16 ′ determines whether or not the EOP 12 is repro using an AND condition that communication between the ATCU 11 and the diagnostic tester 15 is stopped. Further, during the determination, communication between the EOP 12 and the diagnostic tester 15 is prohibited.

  When the communication between the ATCU 11 and the diagnostic tester 15 is stopped and it is determined that the EOP 12 is a repro, the determination information is transmitted from the ECM 13 to the EOP 12, and the communication switching means 14 diagnoses the communication prohibited. Communication between the tester 15 and the EOP 12 is permitted. Thereby, repro of EOP12 becomes possible. At this time, since the EOP 12 communicates with the diagnostic tester 15 by impersonating the ATCU 11 whose communication is stopped, the EOP 12 communicates with the diagnostic tester 15 while the communication state between the ECM 13 and the diagnostic tester 15 is continued. Can do.

  FIG. 4 illustrates a specific control flow of repro by the diagnostic tester in the second embodiment.

  First, it is determined on the ECM 13 side whether communication between the ATCU 11 and the diagnostic tester 15 is stopped (S111). If it is determined that the communication is stopped, the ECM 13 side determines whether it is a repro of the EOP 12 or not by a special shift operation as described above (S112). At that time, communication with the diagnostic tester 15 is permitted on the ECM 13 side and prohibited on the EOP 12 side. If it is determined in the determination (S112) that the current mode is not the EOP12 repro mode, the current communication state is continued. On the other hand, when it is determined that the EOP repro mode is determined by the determination (S112), the determination information is transmitted from the ECM 13 to the EOP 12 using CAN ID.aa3 of a communication line different from CAN ID.aaa, for example. (S113). When the EOP12 repro determination information is received on the EOP12 side and it is determined that the EOP12 repro mode is set (S114), communication with the diagnostic tester 15 in the prohibited state is permitted (S115). At this time, since the EOP 12 communicates with the diagnostic tester 15 while impersonating the ATCU 11 whose communication is stopped, it is not necessary to prohibit communication with the diagnostic tester 15 on the ECM 13 side.

  As a result, even if the EOP 12 cannot normally communicate directly with the diagnostic tester 15 because the failure diagnosis service function is not provided, the EOP 12 can be connected to the ATCU 11 when the ATCU 11 fails by performing a special shift operation or the like. As a result, communication with the diagnostic tester 15 can be performed and the EOP 12 can be re-proposed.

  The embodiment of the present invention is not necessarily limited to the above-described device, and includes all devices including an ECU.

  Further, the present invention is not limited to the first and second embodiments described above, and includes various modifications. For example, the first and second embodiments described above are described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of the first and second embodiments can be replaced with the configuration of the first and second embodiments, and the configuration of the first and second embodiments can be replaced with that of the first and second embodiments. It is also possible to add a configuration. Further, it is possible to add, delete, and replace other configurations for a part of the configurations of the first and second embodiments.

  Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files that realize each function can be stored in a storage device such as a memory, a hard disk, or an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

1, 11 ... ATCU (Electronic control unit ECU of automatic transmission equipped with failure diagnosis service function)
2,12 ... EOP (electronic control unit ECU for electric oil pump for automatic transmission without failure diagnosis service function)
13 ... ECM (Electronic control unit ECU for engines with a failure diagnosis service function)
4, 14 ... Communication switching means 5, 15 ... Diagnostic testers 6, 16, 16 '... Repro target judging means 17 ... Stop judging means 10, 20 ... Fault diagnosis control device

Claims (4)

A vehicle fault diagnosis control device equipped with a plurality of electronic control devices,
As well as interconnected communicably said plurality of electronic control units, at least one electronic control unit is smaller than said plurality of, with fault diagnosis service functions by the diagnostic tester,
The electronic control device having the failure diagnosis service function stores information of another electronic control device not having the failure diagnosis service function, and replaces the other electronic control device with the other electronic control device. have line fault diagnosis of the control device,
The electronic control device not equipped with the failure diagnosis service function communicates with the diagnostic tester as the electronic control device provided with the failure diagnosis service function when rewriting the program of the electronic control device. in failure diagnosis control apparatus for a vehicle, characterized in row Ukoto the program rewrite control not provided with the fault diagnostic service function by the diagnostic tester the electronic control device. A vehicle fault diagnosis control device equipped with a plurality of electronic control devices,
The plurality of electronic control devices are communicably connected to each other, and a plurality of electronic control devices smaller than the plurality have a failure diagnosis service function by a diagnostic tester,
The electronic control device having the failure diagnosis service function stores information of another electronic control device not having the failure diagnosis service function, and replaces the other electronic control device with the other electronic control device. have line fault diagnosis of the control device,
When the electronic control device having the failure diagnosis service function that replaces the electronic control device not having the failure diagnosis service function stops communication with the diagnosis tester due to a failure, the failure diagnosis service function is another of the electronic control units equipped with, and stores the information of the electronic control device not provided with the fault diagnosis service function, the alternative to line Ukoto failure diagnosis of the electronic control device to the electronic control device A vehicle fault diagnosis control device characterized by the above. A vehicle fault diagnosis control device equipped with a plurality of electronic control devices,
The plurality of electronic control devices are communicably connected to each other, and a plurality of electronic control devices smaller than the plurality have a failure diagnosis service function by a diagnostic tester,
The electronic control device having the failure diagnosis service function stores information of another electronic control device not having the failure diagnosis service function, and replaces the other electronic control device with the other electronic control device. have line fault diagnosis of the control device,
The electronic control device not equipped with the failure diagnosis service function communicates with the diagnostic tester as the electronic control device provided with the failure diagnosis service function when rewriting the program of the electronic control device. And performing program rewriting control of the electronic control unit not equipped with the failure diagnosis service function by the diagnostic tester,
When the electronic control device having the failure diagnosis service function that replaces the electronic control device not having the failure diagnosis service function stops communication with the diagnosis tester due to a failure, the failure diagnosis service function is another of the electronic control units equipped with, and stores the information of the electronic control device not provided with the fault diagnosis service function, the alternative to line Ukoto failure diagnosis of the electronic control device to the electronic control device A vehicle fault diagnosis control device characterized by the above. The electronic control device not provided with the failure diagnosis service function is provided with the failure diagnosis service function when rewriting the program of the electronic control device, and communication with the diagnosis tester is stopped due to a failure. 4. The vehicle according to claim 2, wherein program rewriting control of the electronic control device not provided with the failure diagnosis service function is performed by the diagnostic tester by performing communication with the diagnostic tester as if impersonating Fault diagnosis control device.

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