Abstract:
The re-use property of a vehicular controller service program is improved by providing a structure capable of easily changing the method of communication to/from an external apparatus and a structure capable of easily changing the vehicle information required for such communication. A service management object communicates with an external scanning tool which is constituted separately from a service execution object including objects for obtaining the fault information. Each individual object thus implements only either communication function with the scanning tool or a vehicle information acquisition function. Thus when changes are required for one of these functions, the remaining object-oriented program modules can be re-used without change. The service execution object may be prepared to obtain every category of fault information desired depending on legislation or vehicle manufacturer requirements.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is based on and incorporates herein by reference Japanese Patent Application No. 2000-378894 filed on Dec. 13, 2000. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a vehicle controller with an information providing function, and more particularly, to a technique for realizing the information providing function with object-oriented programming. 
     2. Description of the Related Art 
     In recent years, progress in mechatronics, that is, combining mechanical techniques and electronic techniques, has progressed with advancements in electronic techniques such as the advent of high performance microprocessors. As a part of the progress of mechatronics, many computer systems have been introduced into vehicles such as automobiles and the like. Such on-board computer systems were developed to enhance resource saving, energy saving, driving performance, safety and other amenities that currently reside within vehicles. On-board computer systems include engine systems, driving systems, running/safety systems, entertainment systems and other systems. 
     In particular, a computer system (hereinafter, referred to as a vehicle controller) for controlling the vehicle, which is required to assure higher reliability, actually has improved reliability by providing self-diagnostic functions. That is, operating conditions of computer systems and sensors are automatically checked to ensure proper operation, and if a fault is generated, a fault code (DTC), as fault information, is generated and stored so that maintenance personnel can understand the contents of the fault. Vehicle information such as fault information can be read by a scanning tool connected to the vehicle and can be provided to an outside worker to facilitate adequate maintenance. The vehicle controller is provided with an information providing function to provide the requested vehicle information through communication with the scanning tool. 
     Here, an outline of operation for obtaining the vehicle information using the scanning tool will be explained. The vehicle information explained above also includes, in addition to the fault information, information about emissions and information about an actuator. Accordingly, the vehicle information is sorted into predetermined categories. Such categories are set as Mode $01 to Mode $09 depending on legislation. For example, the fault information usually includes freeze information covering vehicle conditions when a fault occurs and this freeze information is sorted as “Mode $02”. Moreover, when the freeze information is considered, as an example, the freeze information is changed depending on the specifications of a vehicle manufacturer and therefore such categories have been set with every vehicle manufacturer in particular years. 
     Therefore, the scanning tool explained above designates the category and information included in the category and reads target information from such information. Namely, a service program to realize the information providing function obtains the vehicle information by determining the category designated by the scanning tool through communication with the scanning tool. 
     The invention solves several problems which are discussed below. Under the supposition that computer systems are mounted in a variety of positions in a vehicle, the vehicle information to be obtained by the scanning tool expands because of model changes. Therefore, addition to and/or alterations of the vehicle information is generated in timing of model changes. Moreover, due to differences between vehicle manufacturers and between types of vehicles, or due to differences between vehicle models or grades, the vehicle information is different. Additionally, the change of vehicle information is linked to the change of the category. Accordingly, the service program is requested to easily cover the change of the vehicle information including the change in units of category and moreover to have a format that enables the re-use of an unchanged part thereof. 
     Moreover, a communication method for the scanning tool changes in some cases, but it is preferred that the change of the communication method be covered with the service program so its unchanged part may be re-used. Accordingly, in the present invention, the re-use property defines a first object of forming the service program which is mounted into the vehicle controller which can easily cover the change of the communication method of the external apparatus, such as a scanning tool. A second object is forming the service program to easily cover the change of the requested vehicle information. 
     SUMMARY OF THE INVENTION 
     A service program realizing an information providing function of a vehicle controller is described to achieve the first object explained above. The service program is designed to be objected-aided and is formed in units of objects enabling re-use. The information providing function reads and outputs the vehicle information when a request is issued from the external apparatus such as the scanning tool. The present invention is particularly characterized in that the service program is provided with a service execution object and a service management object. The service execution object obtains the vehicle information based on a drive instruction. 
     Meanwhile, the service management object issues an instruction to the service execution object upon requesting information from the external apparatus through data communication therewith. This service management object also outputs the vehicle information obtained by the service execution object to the external apparatus. Namely, a vehicle information acquisition function and a function for communication with an external apparatus are respectively realized by individual objects. Thereby, when a method for communication with the external apparatus changes, it can be covered easily with a change of the service management object. In this case, the service execution object can be re-used as it is and thereby the re-use property of the service program improves. 
     In this specification, an expression mainly using the term “object” appears as required. It is a matter of course that the function is realized when the controller CPU in a vehicle executes a program in the object. Moreover, a service program to realize an information providing function of a controller for a vehicle to achieve the second object explained above is also formed in units of object enabling re-use and is also provided with a service execution object and a service management object. In this case, this service management object is prepared for every vehicle information group as a predetermined aggregation of the vehicle information and obtains vehicle information among the corresponding vehicle information groups based on the drive instruction. 
     Meanwhile, the service management object determines, upon an information request from the external apparatus, the service execution object through data communication with the external apparatus, issues the drive instruction to the service execution object and outputs vehicle information obtained by the service execution object to the external apparatus. In this case, since the service management object is prepared for every vehicle information group, the drive instruction is issued to the service execution object. 
     Continuing, since the service execution object is provided for every vehicle information group, if the requested vehicle information changes, an update job in units of the vehicle information group including the vehicle information can be realized. Therefore, change of the vehicle information can be covered easily. Moreover, the service execution object corresponding to the vehicle information group which is not changed can be re-used as it is and thereby the re-use property of the service program can be improved. 
     It is preferable that the vehicle information formed as an aggregation of the vehicle information having a higher possibility for simultaneous change, in consideration of a change pattern of the vehicle information. As an example, it is considered to form vehicle information as an aggregation of vehicle information based on legislation or requirements from vehicle manufacturers, or both. Namely, in this case, the vehicle information group is an aggregation for every category. As explained above, when the vehicle information having a higher possibility for the simultaneous change is defined as a vehicle information group, the change will be covered in the higher possibility only with the update job of the corresponding service execution object. As a result, the number of service execution objects to be re-used increases, making additional contribution to further improvement of re-use property of the service program. 
     It has already been described above that the external apparatus generally requests information by designating a category. Therefore, in the configuration where a plurality of service execution objects are prepared corresponding to the category as explained above, the service execution object determines, under the pre-condition that at least identification data to identify the vehicle information is included in the information request from the external apparatus, the corresponding service execution object based on this identification data. In this case, a determination process of the service execution object by the service management object can be simplified. 
     Moreover, the external apparatus usually designates information as a read object together with the category. Therefore, the service management object outputs, under a pre-condition that the designation data for designating the vehicle information in the vehicle information group is further included in the information request from the external apparatus, this designation data together with the drive instruction and thereby the service execution object obtains the vehicle information among the vehicle information group based on the designation data output from the service management object. In this case, the vehicle information acquisition process with the service execution object can be simplified. Moreover, under the pre-condition that a self-diagnostic function to store fault information as information in regard to a fault as a diagnosis object based on a fault detection result of the diagnosis object is provided, the service execution object is formed to obtain the fault information as vehicle information explained above. Under the pre-condition that the self-diagnostic program realizes the self-diagnostic function is formed in units of objects enabling the re-use, a structure for obtaining fault information as vehicle information can be explained below. 
     Namely, when the self-diagnostic program is provided, based on the fault detection result, at least with the fault information management object for management of the diagnosis fault information corresponding to the fault items, the service execution object obtains the diagnosis fault information as fault information by requesting, as required, the diagnosis fault information to the fault information management object. Moreover, when the self-diagnostic program is further provided with an FFD management object for management of freeze information including a vehicle condition when a fault occurs as additional information of the diagnosis fault information, the service execution object is considered to obtain the freeze information as fault information by requesting, as required, the freeze information to the FFD management object. 
     Moreover, when the self-diagnostic program is further provided with a fault detection object for detecting a fault of the diagnosis object, the service execution object obtains fault detection information as fault information by requesting detection information in relation to fault detection to the fault detection object. The phrase “as required” is used in describing the invention because the information is obtained only when acquisition of information is designated from the external apparatus. 
     As explained above, it is preferable, in the point that a change in units of the service execution object can be simplified, to obtain the fault information through operation of the object depending on the request from the service execution object. That is, the service execution object only requests the fault information without any regard for the place where the fault information is stored. The service program and self-diagnostic program installed in the vehicle controller may also be provided as a program driven in a computer. These programs are recorded to a computer-readable recording medium such as an FD, an MO, a DVD, a CD-ROM, a hard disc, or the like and can also be used by loading them to a computer system. Moreover, it is also possible that a program is recorded to a ROM or a backup RAM as a computer-readable recording medium with the ROM or RAM built into the computer system. 
     Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention, together with additional objectives, features and advantages thereof, will be best understood from the following description, the appended claims and the accompanying drawings in which: 
     FIG. 1 is a structural diagram showing an engine control system of an embodiment of the present invention; 
     FIG. 2 is a block diagram showing a structure of the engine control unit of the embodiment; 
     FIG. 3 is an explanatory diagram showing a concept of a program format of the embodiment; 
     FIG. 4 is an explanatory diagram of a message sequence chart showing a sequence of storing fault information; 
     FIG. 5 is an explanatory diagram of a message sequence chart showing a sequence for reading the fault information; 
     FIG. 6 is a flowchart showing a drive process to be executed by a service management object; 
     FIG. 7 is a flowchart showing a fault information acquisition process to be executed by a service execution object; 
     FIG. 8 is a flowchart showing a detected information output process to be executed by a fault detection object. 
     FIG. 9 is a flowchart showing a diagnosis fault information output process to be executed by a fault information management object; and 
     FIG. 10 is a flowchart showing an FFD output process to be executed by an FFD management object. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     An embodiment of the present invention will be explained with reference to the accompanying drawings. 
     FIG. 1 is a structural diagram showing the entire structure of an engine control system. The engine control system is mainly formed of an engine  11  and an engine control unit  16  for controlling the engine  11 . This engine control unit  16  corresponds to a “controller for a vehicle” or “vehicle controller.” 
     Intake air from an air cleaner is supplied to the engine  11  via an intake pipe  12 . To this intake pipe  12 , an air flow sensor  13  for measuring an amount of the intake air, an intake air temperature sensor  14  for detecting an intake air temperature, and a throttle valve  15  that is driven by an accelerator pedal, are disposed. 
     Various signals indicating conditions of the engine  11  are input to the engine control unit  16 . Various signals include an intake air amount detection signal from the air flow sensor  13 , a throttle valve  15  opening detection signal from a throttle sensor  17 , a signal from an air-fuel ratio sensor  18  for detecting oxygen concentration included in exhaust gas, a battery voltage signal from a battery  19 , a detection signal from a water temperature sensor  20 , a rotation signal from a distributor  21  driven by the engine  11  and a cylinder discrimination signal or the like. 
     The engine control unit  16  calculates a fuel injection amount, or the like, corresponding to the operating condition of the engine  11  based on these various detection signals, outputs a fuel injection command to injectors  22   a ,  22   b ,  22   c ,  22   d  preset respectively to a plurality of cylinders of the engine  11  and also executes an operation control of the engine  11  by outputting an ignition command signal to an igniter  23 . 
     Moreover, the engine control unit  16  executes diagnosis of respective portions of the vehicle depending on each signal detected from each sensor group. Therefore, a test switch  24  for setting a diagnosis mode to output a fault detection result is disposed to the engine control unit  16  and an alarm lamp  25  for displaying a diagnosis result as a test result is also connected to the engine control unit  16 . A scanning tool  50  can also be connected to the engine control unit  16 , as indicated with a broken line, to read from an external device, information based on the diagnosis of each portion of the vehicle by the engine control unit  16 . A switch  26  is an ignition switch for connecting the battery  19  to the engine control unit  16  and a starter switch  28  for controlling a starter motor  27  are also provided in conjunction with this ignition switch  26 . 
     Next, the engine control unit  16  will be explained. FIG. 2 is a block diagram showing a structure of the engine control unit  16  shown in FIG.  1 . The engine control unit  16  is also provided with a CPU  31  forming a computer system. This CPU  31  receives, as an input, data from an analog input circuit  32  and a digital input circuit  33 . The analog input data from the analog input circuit  32  is input to the CPU  31  through conversion into digital data in an A/D converter  34 . 
     To the analog input circuit  32 , a detection signal Us from the air flow sensor  13 , a detection signal Thw from the water temperature sensor  20 , a detection signal Tha from the intake air temperature sensor  14  and voltage of the battery  19  +B are respectively input. Meanwhile, to the digital input circuit  33 , a cylinder discrimination signal G 1  from the distributor  21  and a rotation angle signal Ne, a lean•rich signal Ox corresponding to the oxygen concentration from the air-fuel ratio sensor  18 , a signal STO showing opening of the throttle valve  15  from the throttle sensor  17 , a start signal STA from the starter switch  28  and a signal T for setting the diagnosis mode from the test switch  24  are input. The A/D converter  34  has a multiplexer function to sequentially select and read the various detection signals to be input to the analog input circuit  32  depending on an instruction from the CPU  31  and convert the signals into digital data. Moreover, a power supply circuit  35  supplies the voltage of battery  19  +B to the CPU  31  via the ignition switch  26  and also always supplies backup power supply voltage, Batt, thereto. 
     Output data from the CPU  31  is supplied to output circuits  36 ,  37  and  38  and it is then extracted as an output signal from the engine control unit  16 . Namely, the output circuit  36  outputs an ignition instruction signal IGt to the igniter  23 . The output circuit  37  outputs a signal W showing the diagnosis result to control the lighting of the alarm lamp  25 . An output signal τq from the output circuit  38  indicates the fuel injection amount corresponding to the operating condition of the engine  11  and this signal is output to the injectors  22   a  to  22   d  to change the fuel injection amount of injectors  22   a  to  22   d.    
     Moreover, an input/output circuit  40  is also connected to the CPU  31  for communicating with the external device. Thereby, when the scanning tool  50  is connected, data communication with the scanning tool  50  can be realized to output information requested from the scanning tool  50 . Moreover, although not shown in the figure, various vehicle information pieces can be obtained from outside the engine control unit by using a network within the vehicle via the input/output circuit  40 . 
     Within the CPU  31 , a memory  39  for storing a self-diagnostic program and a service program, to be explained later, is provided. This memory  39  is formed of a standby RAM or a non-volatile EEPROM to store data to which electric power is supplied even when ROM and the ignition switch  26  are turned OFF. The self-diagnostic program and service program are stored within the ROM. As will be explained later, diagnosis fault information as “diagnosis fault information” and freeze frame data (hereinafter referred to as “FFD”) as “freeze information” including the vehicle condition when a fault occurs, are stored by the self-diagnostic program in the standby RAM or EEPROM. This embodiment is characterized in a format of the program stored in the ROM of memory  39 . Next, the program format will be explained. 
     FIG. 3 shows a concept of the format (architecture) of the program stored in the ROM of the memory  39 . The program indicated in this figure is object-oriented designed and is described in such a manner that an object is a minimum structural unit. In the program as a whole, processes are sequentially executed by combining the objects with a message passed from one object to another. An object is provided with data (attribute) and a method (procedure) for the data. The method of an object is executed by a message from another object. In this embodiment, the expression using “object” as the subject of a sentence, or “object executes . . . ”, is often used as explained above, but the execution is actually carried out when the CPU  31  executes the process program. Moreover, each object is noted as such in the figure. 
     As shown in FIG. 3, the program in this embodiment is provided with at least a fault detection object  100 , a fault information management object  200 , an FFD management object  300 , a service management object  400  and a service execution object  500 . These objects  100  to  500  are programs on a platform (hereinafter referred to as “PF”)  600 . The program operates while executing information exchange as required with the PF  600 . 
     As indicated with a chain line in FIG. 3, the objects  100  to  300  are structural elements of the self-diagnostic program and the objects  400  and  500  are structural elements of the service program. The fault detection object  100  is prepared for every fault detection process of a diagnosis object. When the diagnosis is started by an instruction from the PF  600 , a fault diagnosis object as an object of self-diagnosis is detected based on information from each sensor group input to the engine control unit  16 . The fault information management object  200  determines a fault level when a normal/fault message is sent from the fault detection object  100  and stores the diagnosis fault information. The FFD management object  300  obtains the vehicle condition from the PF  600  when an FFD storage request is sent from the fault information management object  200  and stores the FFD. 
     The service management object  400  executes a communication process with the scanning tool  50 , when the scanning tool  50  is connected, to set up a data communication ready condition. Connection of this scanning tool  50  via the input/output circuit  40  has already been explained (refer to FIG.  2 ). When an information request is generated from the scanning tool  50 , the service execution object  500  is alerted to issue a drive instruction. For this drive instruction, fault information output from the service execution object  500  is output to the scanning tool  50  as a response. 
     The service execution object  500  is prepared for every aggregation of predetermined fault items. This aggregation corresponds to a “vehicle information group”. When the drive instruction is issued from the service execution object  500 , the fault information is sent to objects  100  to  300  which consist of the fault detection object  100 , fault information management object  200 , and FFD management object  300 . Therefore, objects  100  to  300  collect and output the requested fault information. 
     Objects  100  to  300  forming the self-diagnostic program store the diagnosis fault information and FFD based on the diagnosis instruction from the PF  600  and also output the requested fault information in response to the request of the fault information from the service execution object  500 . Therefore, combining objects  100  to  300  will be explained in more detail by referring to a message sequence chart (hereinafter referred to as “MSC”) in relation to storage of fault information. 
     FIG. 4 is the MSC indicating the sequence for storing the fault information. First, the PF  600  notifies the start of diagnosis to the fault detection object  100 . This message to notify the start of the diagnosis is sent in respective timings for each fault detection object  100 . The fault detection object  100  having received the instruction for starting diagnosis from the PF  600  executes a fault detection process S 1 . With this fault detection process S 1 , the detection information such as each sensor value as “detection information” in relation to the fault detection is obtained and a normal condition or a fault condition is sent to the fault information management object  200 . 
     When the normal/fault message is sent, the fault information management object  200  executes a fault level determination process S 2  and stores the diagnosis fault information. The diagnosis fault information may naturally be stored within the fault information management object  200  itself, but it is preferably stored within a fault information storing object (not shown) prepared additionally when re-use of the self-diagnostic program is considered. Here, as diagnosis fault information, “temporary fault” indicating a temporary fault, or “determined fault” indicating a continuous fault or “normal” indicating the normal condition is stored. 
     Moreover, when FFD storage timing is determined in the fault level determination process S 2  of the fault information management object  200 , an FFD storage request is sent to the FFD management object  300 . Whether it is the FFD storage timing or not is different for every fault detection object  100 , in more detail, for every fault detection content. Namely, the FFD is sometimes stored when a fault is defined as a determined fault or when a fault is detected. 
     When the FFD storage request message is issued, the FFD management object  300  executes an FFD storing process S 3 . In this FFD storing process S 3 , the vehicle condition is obtained from the PF  600  to store the FFD. Like the diagnosis fault information, this FFD may be stored in the FFD management object  300  itself, but it is preferably stored in an FFD storing object (not shown) prepared separately. When the FFD is stored, the FFD management object  300  sends a message to end the request of the FFD storage request, to the fault information management object  200 . 
     An end of notification message for the fault detection object  100  is output by the fault information management object  200  and the fault detection object  100  notifies the PF  600  of the end of diagnosis. Thereby, the diagnosis process is completed. Subsequently, combining objects  100  to  500  will be explained with reference to the MSC in relation to a read operation of the fault information with the scanning tool  50 . 
     FIG. 5 is the MSC indicating a fault information read sequence. An operator of the scanning tool  50  designates a category of the fault information and the fault information in the category as a read object. This category is classified into a sort called the Mode determined by legislation or determined by a request of a vehicle manufacturer. It has already been explained that the service execution object  500  is prepared for every predetermined aggregation of the fault information. In more detail, the service execution object  500  is prepared in units according to a category designated via the scanning tool  50 . 
     As explained above, the information request is sent to the service management object  400  from the scanning tool  50 , but this information request includes identification data for identifying the category explained above and designation data (parameter) for designating the fault information within the category. The service management object  400  executes a drive process S 4  in response to the information request from the scanning tool  50 . In this drive process S 4 , the corresponding service execution object  500  is determined by the identification data explained above and the drive instruction is issued to the service execution object  500 . In this case, the designation data explained above is output together with the drive instruction. When the drive instruction is issued, the service execution object  500  executes a fault information acquisition process S 5 . In the fault information acquisition process S 5 , the fault information is sent to at least any one of the objects  100  to  300  based on the designation data output together with the drive instruction. 
     When the service execution object  500  requests the fault information, the fault detection object  100  executes a detected information output process S 6  and outputs detected information. Moreover, in the same manner, the fault information management object  200  executes a diagnosis fault information output process S 7  to output the diagnosis fault information and the FFD management object  300  executes an FFD output process S 8  to output the FFD. 
     The service execution object  500  outputs the obtained fault information to the service management object  400  when the information is output from all of the objects  100  to  300  having requested the fault information. Thereby, the service management object  400  issues the response to the scanning tool  50 . 
     This embodiment has a characteristic in the format of the program stored in the ROM of the memory  39 , and in more detail, has the characteristic in a format of the service program. Therefore, the drive process S 4 , diagnosis fault information acquisition process S 5 , detected information output process S 6 , diagnosis fault information output process S 7  and FFD output process S 8  shown in FIG. 5 will be explained more practically for full understanding of operations of the objects  100  to  500 . 
     First, the drive process S 4  will be explained. FIG. 6 is a flowchart showing the drive process S 4  to be executed by the service management object  400 . In a first step (hereinafter a term “step” is indicated only by the letter “S”)  4000 , the service execution object  500  is determined based on the identification data explained above. For example, when the identification data designates “Mode$02”, the service execution object  500  for obtaining the FFD is determined as an object  500 . 
     In S 4010 , the drive instruction is issued to the service execution object  500  determined in S 4000 . In this case, the designation data explained above is output. With the drive instruction in S 4010 , the service execution object  500  outputs the fault information. Accordingly, after the fault information is output from the service execution object  500 , having issued the drive instruction, the fault information is converted to response data in S 4020 . This process converts the fault information conforming to a communication protocol for the scanning tool  50 . In S 4030 , the converted response data is output as a response to the scanning tool  50 . Thereafter, the drive process S 4  ends. 
     Subsequently, the diagnosis fault information acquisition process S 5  will be explained. FIG. 7 is a flowchart indicating the diagnosis fault information acquisition process S 5  executed by the service execution object  500 . In a first step S 5000 , it is determined whether the information to be detected is designated or not. This determination is conducted based on the designation data explained above. When it is determined (S 5000 : YES) that the information to be detected is designated, the designated information to be detected is sent to the fault detection object  100  in S 5010 . When the information to be detected is obtained, the process goes to S 5020 . Meanwhile, when it is determined that the information to be detected is not designated (S 5000 : NO), step S 5010  is not executed and the process goes to S 5020 . 
     In S 5020 , it is determined whether the diagnosis fault information is designated or not. This determination is also based on the designation data explained above. When it is determined that the diagnosis fault information is designated (S 5020 : YES), the designated diagnosis fault information is sent to the fault information management object  200  in S 5030 . Thereby, when the diagnosis fault information is obtained, the process goes to S 5040 . However, when it is determined that the diagnosis fault information is not designated (S 5020 : NO), step S 5030  is not executed and the process goes to S 5040 . 
     In S 5040 , whether the FFD is designated or not is determined. This determination is also based on the designation data explained above. When it is determined that the FFD is designated (S 5040 : YES), the designated FFD is sent to the FFD management object  300 . Accordingly, after the FFD is obtained, the fault information acquisition process S 5  is completed. On the other hand, when it is determined that the FFD is not designated (S 5040 : NO), step S 5050  is not executed and the fault information acquisition process S 5  is completed. 
     Here, it should be noted that the three processes A, B, and C, namely the process in relation to the acquisition of the detected information from the fault detection object  100  in FIG. 7 (process in S 5000  and S 5010  indicated with the letter A, hereinafter referred to as “process A”), the process in relation to the acquisition of the diagnosis fault information from the fault information management object  200  (process in S 5020  and S 5030  indicated with the letter B, hereinafter referred to as “process B”) and the process in relation to the acquisition of the FFD from the FFD management object  300  (process in S 5040  and S 5050  indicated with the letter C, hereinafter referred to as “process C”) are not always described simultaneously in the fault information acquisition process S 5 , because it is also thought that the service execution object  500  is prepared in units of category designated with the scanning tool  50  and only the FFD is included, for example, in a certain category. In the fault information acquisition process S 5  executed by the service execution object  500  corresponding to the category including only the FFD, only the process C is described. More practically, the service execution object  500 , for example, corresponding to “Mode$02” to read the FFD, corresponds to such case. In this case, for example, when an “engine speed when a fault occurs” is designated by the designation data, the service execution object  500  sends, in the process C, the “engine speed when a fault occurs” to the FFD management object  300 . In the same manner, only one process (process A or B) is described in a certain service execution object  500  and two processes (processes A and B, or B and C or C and A) are described. 
     Subsequently, the detected information output process S 6  will be explained. FIG. 8 is a flowchart indicating the detected information output process S 6  executed by the fault detection object  100 . In a first step S 6000 , the information to be detected from the service execution object  500  is determined. In subsequent step S 6010 , the information pieces to be detected are collected in such a manner, for example, that the sensor values output in real-time from the sensor group are collected. In the next step S 6020 , after the collected information pieces to be detected are output, the detected information output process S 6  ends. 
     Continuing, the diagnosis fault information output process S 7 , to be executed by the fault information management object  200 , and the FFD output process S 8 , to be executed by the FFD management object  300 , will be explained based on the flowcharts of FIG.  9  and FIG.  10 . These processes are similar to the detected information process S 6  explained above and therefore the processes are explained briefly. 
     In the diagnosis fault information output process S 7 , when the process is started, the requested diagnosis fault information is determined (S 7000  in FIG.  9 ). The diagnosis fault information is collected by reading it, for example, from the fault information storing object in which the diagnosis fault information is stored (S 7010 ). Subsequently, the collected diagnosis fault information is output (S 7020 ). Thereafter, this diagnosis fault information output process S 7  ends. 
     When the process is started in the FFD output process S 7 , the requested FFD is determined (S 8000  in FIG.  10 ). The FFD is collected (S 8010 ) by reading it, for example, from the FFD storing object in which the FFD is stored. The FFD is then output (S 8020 ). Thereafter, this FFD output process S 8  ends. 
     The effect of formatting the objects  100  to  500  will be explained below. In this embodiment, the service program is formatted in classification of the service management object  400  for communicating with the scanning tool  50  and the service execution object  500  for requesting and obtaining the fault information of objects  100  to  300  (refer to FIG.  3 ). Namely, the communication function with the scanning tool  50  and the fault information acquisition function are realized with different objects. Thereby, when only the method of communication with the scanning tool  50  is changed, it can be covered easily by altering only the service management object  400 . In this case, the service execution object  500  can be reused as it is and re-use property of the service program can be improved. 
     Moreover, in this embodiment, the service execution object  500  is prepared for every category designated with the scanning tool  50 . In other words, the service execution object  500  is prepared for every aggregation of the fault information (vehicle information group) belonging to the designated category. Therefore, if the fault information of the read object is changed, an update job in units of aggregation becomes possible to easily cover the change of fault information. The category designated with the scanning tool  50  is determined based on legislation and/or on a requirement from a vehicle manufacturer. Therefore, there is a higher possibility for change of fault information in units of this category. In the case where the service execution object  500  is prepared in units of the aggregation of the fault information having the higher possibility for simultaneous change, the possibility for summarizing various changes in units of the object becomes higher. Accordingly, the number of service execution objects  500  which may be re-used increases, making a contribution to the improvement of the re-use property of the service program. 
     Moreover, in this embodiment, the service management object  400  determines the service execution object  500  (S 4000  in FIG. 6) based on the identification data from the scanning tool  50 . Thereby, the determination process for the service execution object  500  with the service management object  400  can be simplified. It is because the identification data corresponds to the category to be input. For example, it is enough when the correspondence between the identification data and service execution object  500  is prepared. Moreover, in this embodiment, the service execution object  500  requests the fault information of objects  100  to  300  (S 5010 , S 5030 , S 5050  in FIG. 7) on the basis of the designation data for designating information in the category. Thereby, the vehicle information acquisition process by the service execution object  500  can also be simplified. 
     As explained above, the service execution object  500  obtains the fault information output from objects  100  to  300  by sending the fault information to objects  100  to  300 . Namely, the fault information can be obtained through operations of objects  100  to  300  depending on the request from the service execution object  500  (refer to FIGS. 8,  9 , and  10 ). That is, the service execution object  500  only requests the fault information and is not required to regard an area in which the fault information is stored. As a result, change in units of service execution object  500  can be extremely simplified. 
     The present invention is not limited to the embodiment explained above and allows various changes or modifications within the scope without departing from the subject matter of the claims. 
     (a) In this embodiment, the service execution object  500  is prepared in units of category designated with the scanning tool  50 . In this case, it is possible to accomplish the determination process by the service management object  400  which can be simplified in such a point that the identification data output from the scanning tool  50  corresponds to the drive service execution object  500  on a one to one basis. However, a setting unit of the service execution object  500  is not limited to that explained here. The setting unit can be thought of in consideration of various modification patterns of the system, that is, to be set in units of aggregation of the fault information having the higher possibility for simultaneous change. 
     (b) Moreover, in the above embodiment, an example of reading fault information with the scanning tool  50  is explained but the information as a read object of the scanning tool  50  is not limited to the fault information. Namely, the case can be considered where the vehicle information, including the fault information, is a read object. 
     More practically, steps S 5060  and S 5070  in FIG. 7 (process shown with a broken line indicated by the letter D, hereinafter referred to as “process D”) is described in the fault information acquisition process S 5  of the service execution object  500 . Namely, when the vehicle information is designated (S 5060 : YES) in the determination whether the vehicle information is designated or not (S 5060 ), the vehicle information is sent to the PF  600  (S 5070 ). Thereby, a structure for reading the various vehicle information pieces such as information in relation to emissions and information related to an actuator can also be realized by the process D and the process in relation to the vehicle information output in the side of PF  600  corresponding to process D. The vehicle information is also thought of as information obtained from the PF  600  via the network in the vehicle. 
     The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.