JP2005354344A - Fault diagnostic apparatus and method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fault diagnostic apparatus and a fault diagnostic method capable of preventing an object of fault diagnosis from being stolen. <P>SOLUTION: This system is composed of a fault diagnostic apparatus 1 for vehicles having a radio communication means 11, a vehicle 2 having a radio communication means 22, and a communication permission device 3 having a radio communication means 31. The diagnostic equipment 1 has a permission request signal generating means 12 which generates a permission request signal for requiring permission to perform radio communication between the communication means 11 and the communication means 22. The permission device 3 has a permission determination means 33 for determining permission to perform radio communication between the communication means 11 and the communication means 22, and a permission signal generating means 32 which generates a permission signal for permitting radio communication between the communication means 11 and the communication means 22. When a permission signal is acquired from the permission device 3 by the diagnostic equipment 1, radio communication is permitted between the communication means 11 and the communication means 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a failure diagnosis apparatus and method for diagnosing a failure of a failure diagnosis target such as a vehicle.

For example, as a conventional vehicle fault diagnosis system, for example, there is one described in Patent Document 1 below.
In this system, in order to improve the convenience of the work area by eliminating the trouble of connector connection and cable handling when connecting a fault diagnosis device outside the vehicle to a connector provided on the vehicle using a signal transmission cable In addition, a failure diagnosis device is provided by providing wireless devices on both the failure diagnosis device outside the vehicle and the vehicle that is the failure diagnosis target, and communicating wirelessly.

Japanese Patent Laid-Open No. 7-50886

However, in the prior art described in the above-mentioned Patent Document 1, an external failure diagnosing device is obtained when the restriction on the use of the vehicle that is the subject of the failure diagnosis can be released by the external failure diagnosing device. Could steal the vehicle.
An object of the present invention is to provide a failure diagnosis apparatus and method capable of preventing theft of a failure diagnosis target.

  In order to solve the above problems, the present invention provides a permission for permitting wireless communication between the first wireless communication means provided in the failure diagnosis means and the second wireless communication means provided in the failure diagnosis target. A signal generation unit is provided, and when a permission signal is acquired by the first or second wireless communication unit, wireless communication between both wireless communication units is permitted.

  ADVANTAGE OF THE INVENTION According to this invention, the failure diagnosis apparatus and method which can prevent theft of a failure diagnostic object can be provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings described below, components having the same function are denoted by the same reference numerals, and repeated description thereof is omitted.
Embodiment 1
"Constitution"
FIG. 1 is a block diagram showing the configuration of the failure diagnosis apparatus according to Embodiment 1 of the present invention.
In FIG. 1, 1 is a vehicle failure diagnosis apparatus, 11 is a wireless communication means, and 12 is a communication permission request signal generation means. 2 is a vehicle to be diagnosed, 21 is a wireless communication device, 22 is a wireless communication means, 23 is a communication line, 24 is a first electronic control device, 25 is a second electronic control device, 201 is a sensor (keyless antenna) ), 202, switches (door lock / unlock switch), 203, actuators, 204, power supply circuit (vehicle battery drive), 211, sensors (door open / closed state detection switch, door lock / unlock state detection switch) , 212 are switches, 213 is an actuator (door lock / unlock motor), and 214 is a power supply circuit (vehicle battery drive). 3 is a communication permission device installed outside the vehicle 2, 31 is a wireless communication means, 32 is a permission signal generating means, 33 is a permission determining means, and 4 is a portable remote control key.

The vehicle fault diagnosis device 1, the communication permission device 3, and the portable remote control key 4 are outside the vehicle 2. The vehicle fault diagnosis device 1, the vehicle 2, and the communication permission device 3 have wireless communication means 11, 22, and 31, respectively. The wireless communication unit 11 of the vehicle fault diagnosis device 1 performs wireless communication between the communication permission device 3 and the wireless communication device 21 provided in the vehicle 2. The wireless communication means 22 of the wireless communication device 21 in the vehicle 2 performs wireless communication with the vehicle failure diagnosis device 1. The wireless communication means 31 of the communication permission device 3 performs wireless communication with the vehicle failure diagnosis device 1. In the vehicle 2, the wireless communication device 21, the first electronic control device 24, the second electronic control device 25, sensors 201 and 211, switches 202 and 212, actuators 203 and 213, power supply circuits 204 and 214 Are connected by a communication line 23.
The vehicle failure diagnosis apparatus 1 transmits a permission request signal to the permission request signal generating means 12 for generating a permission request signal for communication and a permission signal from the communication permission apparatus 3, and receives a permission signal from the communication permission apparatus 3. Means 11 are included.
The communication permission device 3 receives a permission signal generation unit 32 that generates a permission signal, a permission request signal transmitted from the vehicle fault diagnosis device 1, and transmits a permission signal, and a permission request signal The vehicle failure diagnosis apparatus 1 as a transmission source has permission determination means 33 for determining whether or not diagnosis communication is possible.

<Process flow>
Next, a processing flow of the failure diagnosis apparatus according to the first embodiment will be described with reference to FIGS.
2 is a flow of processing in the vehicle fault diagnosis apparatus 1, FIG. 3 is a flow of processing in the communication permission apparatus 3, FIG. 4 is a flow of processing in the wireless communication apparatus 21 of the vehicle 2, and FIG. Shows the flow of processing.

<Processing flow of vehicle fault diagnosis apparatus 1>
When the vehicle failure diagnosis apparatus 1 starts diagnosis, first, in S21, it is determined whether or not a communication link with the communication permission apparatus 3 is established. If the communication link is not established, a predetermined error display indicating that is displayed on the display means of the vehicle fault diagnosis apparatus 1 in S22.
If a communication link is established with the communication permission device 3, the permission request signal transmission unit 12 transmits a permission request signal to the communication permission device 3 in S23.
Next, in S24, it is determined whether a permission signal is received from the communication permission device 3. When a non-permission signal is received from the communication permission device 3 or when a permission signal is not received, a predetermined error display is displayed on the display means in S22.
When the permission signal is received from the communication permission device 3, it is determined in S25 whether or not a communication link with the wireless communication device 21 of the vehicle 2 is established. If the communication link has not been established, an error is displayed on the display means in S22.
If a communication link is established with the wireless communication device 21, a failure diagnosis command is transmitted to the wireless communication device 21 in S26.
Next, in S27, it is determined whether diagnostic data is received from the wireless communication device 21. If diagnostic data is not received, an error is displayed on the display means in S22.
If diagnostic data is received from the wireless communication device 21, the failure diagnosis result is displayed on the display means in S28, and the diagnosis is terminated.

<Processing flow of communication permission device 3>
First, in S31, the communication permission device 3 determines whether or not a communication link with the vehicle failure diagnosis device 1 is established.
If a communication link is established with the vehicle fault diagnosis apparatus 1, it is determined in S32 whether a permission request signal has been received from the vehicle fault diagnosis apparatus 1.
When the permission request signal is received from the vehicle failure diagnosis apparatus 1, the ID acquired from the permission request signal from the vehicle failure diagnosis apparatus 1 is decrypted in S33, and the acquired ID and the communication permission apparatus 3 are registered in advance. The ID is checked. The ID information on the vehicle failure diagnosis apparatus 1 side is assigned and encrypted in the permission request signal.
Next, in S34, the permission determination means 33 determines whether the acquired ID and the registered ID match.
If they match, in S35, the permission signal generation means 32 transmits a permission signal to the vehicle failure diagnosis apparatus 1.
If they do not coincide, in S36, the permission signal generation means 32 transmits a non-permission signal to the vehicle failure diagnosis apparatus 1.
<Processing Flow of Wireless Communication Device 21>
First, in S41, the wireless communication device 21 determines whether or not a communication link with the vehicle failure diagnosis device 1 is established.
If a communication link is established with the vehicle failure diagnosis apparatus 1, it is determined in S42 whether a failure diagnosis command has been received from the vehicle failure diagnosis apparatus 1.
When a failure diagnosis command is received from the vehicle failure diagnosis apparatus 1, the failure diagnosis command is transmitted to the corresponding electronic control devices 24 and 25 in S43.
Next, in S44, it is determined whether or not diagnostic data has been received from the corresponding electronic control units 24 and 25.
When diagnostic data is received from the electronic control units 24 and 25, the diagnostic data is transmitted to the vehicle fault diagnostic apparatus 1 in S45.

<Processing flow of electronic control devices 24 and 25>
The electronic control devices 24 and 25 first determine whether or not a failure diagnosis command has been received from the wireless communication device 21 in S51.
When a failure diagnosis command is received from the wireless communication device 21, the received failure diagnosis command is executed in S52.
Next, in S53, it is determined whether the process is completed.
When the process is completed, diagnostic data as a result of the process is transmitted to the wireless communication device 21.

<Overall processing flow>
Next, the overall processing flow will be described.
When the diagnosis is started, the vehicle fault diagnosis device 1 and the communication permission device 3 installed outside the vehicle 2 establish a communication link (S21). When the communication link is established, the vehicle failure diagnosis apparatus 1 transmits a permission request signal from the permission request signal generation means 12 (S23).
The communication permission device 3 receives the permission request signal (S32), and decrypts the ID information on the vehicle fault diagnosis device 1 side and the ID information registered in the communication permission device 3 that is allocated and encrypted in the received data. Are collated (S33). When the collation result of each decrypted ID information is established, the communication permission device 3 transmits a permission signal to the vehicle failure diagnosis device 1 (S35), and when it is not satisfied, a communication permission device 3 transmits a disapproval signal (S36).
Upon receiving the permission signal (S24), the vehicle failure diagnosis apparatus 1 establishes a communication link with the wireless communication device 21 of the vehicle 2 that is the object of failure diagnosis (S25), and the electronic control devices 24 and 25 mounted on the vehicle 2 are established. And send / receive diagnostic commands and diagnostic data. When a non-permission signal is received from the communication permission device 3 or when the signal cannot be received, an error is displayed on the display means of the vehicle failure diagnosis device 1 (S22).

<Permission request signal and permission signal>
FIG. 6A shows the format of the wireless communication permission request signal, and FIG. 6B shows the format of the permission signal.
The format of the permission request signal shown in (a) is registered in the transmission source address, the transmission source address, the data length, the identification ID for the communication permission request signal, the data portion (the vehicle failure diagnosis device 1 (or the wireless communication device 21). ID information) and a checksum.
The format of the permission signal shown in (b) includes a transmission source address, a transmission source address, a data length, an identification ID for a communication permission signal, a data part (verification result information (permission / non-permission)), and a checksum.

As described above, the failure diagnosis apparatus according to the first embodiment permits wireless communication between the wireless communication means 11 provided in the vehicle failure diagnosis apparatus 1 and the wireless communication means 22 provided in the vehicle 2. When the permission signal generated by the permission signal generating means 32 is acquired by the wireless communication means 11, the wireless communication means 11 and the wireless communication means 12 have a permission signal generating means 32 for generating a permission signal. Wireless communication is allowed between them.
Further, the failure diagnosis method of the first embodiment is a permission signal for permitting wireless communication between the wireless communication means 11 provided in the vehicle failure diagnosis apparatus 1 and the wireless communication means 22 provided in the vehicle 2. The permission signal generation step of generating the permission signal, the permission signal acquisition step of acquiring the permission signal generated in the permission signal generation step by the wireless communication means 11, and the permission signal acquired by the wireless communication means 11 in the permission signal acquisition step The wireless communication means 11 and the wireless communication means 22 are permitted.
The failure diagnosis apparatus according to the first embodiment includes a vehicle failure diagnosis apparatus 1 having a wireless communication unit 11, a vehicle 2 having a wireless communication unit 22, and a communication permission apparatus 3 having a wireless communication unit 31. The vehicle failure diagnosis apparatus 1 includes a permission request signal generation unit 12 that generates a permission request signal for requesting permission for wireless communication between the wireless communication unit 11 and the wireless communication unit 22, and the communication permission device 3 includes: , A permission determination unit 33 that determines permission of wireless communication between the wireless communication unit 11 and the wireless communication unit 22, and a permission signal that permits wireless communication between the wireless communication unit 11 and the wireless communication unit 22. Wireless communication between the wireless communication unit 11 and the wireless communication unit 22 is permitted when the vehicle failure diagnosis device 1 acquires a permission signal from the communication permission device 3. like You have me.
With the configuration as described above, the vehicle failure diagnosis apparatus 1 cannot perform wireless communication between the vehicle failure diagnosis apparatus 1 and the vehicle 2 unless it receives a permission signal from the communication permission apparatus 3. The security at the time of failure diagnosis is improved, and theft of the failure diagnosis target can be prevented.
The determination of permission for wireless communication is performed by collating the received ID with a pre-registered ID. This makes it possible to easily and reliably determine whether to permit wireless communication.

Embodiment 2
"Constitution"
FIG. 7 is a block diagram showing the configuration of the failure diagnosis apparatus according to the second embodiment of the present invention.
In the first embodiment, the permission request signal is transmitted from the vehicle failure diagnosis device 1 outside the vehicle 2 to the communication permission device 3 that is also outside the vehicle 2, and the permission signal that is the result of determination by the communication permission device 3 is communicated. The permission device 3 is configured to transmit to the vehicle failure diagnosis device 1.
On the other hand, in the second embodiment, a permission request signal is transmitted from the wireless communication device 21 in the vehicle 2 to the communication permission device 3 outside the vehicle 2, and a permission signal that is a result of determination by the communication permission device 3 is wireless It is configured to transmit to the communication device 21. Other configurations are the same as those of the first embodiment.

<Process flow>
Next, a processing flow of the failure diagnosis apparatus according to the second embodiment will be described with reference to FIGS.
8 shows the flow of processing in the vehicle fault diagnosis apparatus 1, FIG. 9 shows the flow of processing in the communication permission apparatus 3, and FIG. 10 shows the flow of processing in the wireless communication apparatus 21 of the vehicle 2.

<Processing flow of vehicle fault diagnosis apparatus 1>
When the vehicle failure diagnosis apparatus 1 starts diagnosis, first, in S81, the vehicle failure diagnosis apparatus 1 determines whether or not a communication link with the wireless communication apparatus 21 is established. If the communication link has not been established, it is determined in S82 whether a predetermined time has passed. If it has elapsed, an error is displayed on the display means of the vehicle failure diagnosis apparatus 1 in S83.
If a communication link is established with the wireless communication device 21, a failure diagnosis command is transmitted to the wireless communication device 21 of the vehicle 2 in S84.
Next, in S85, it is determined whether diagnostic data is received from the wireless communication device 21. If diagnostic data is not received, it is determined in S82 whether the specified time has elapsed. If it has elapsed, an error is displayed on the display means in S83.
If diagnostic data is received from the wireless communication device 21, the failure diagnosis result is displayed on the display means in S86, and the diagnosis is terminated.

<Processing flow of communication permission device 3>
The communication permission device 3 first determines whether or not a communication link is established with the wireless communication device 21 of the vehicle 2 in S91.
If a communication link is established with the wireless communication device 21, it is determined in S92 whether a permission request signal has been received from the wireless communication device 21.
When the permission request signal is received from the wireless communication device 21, the ID acquired from the permission request signal from the wireless communication device 21 is decrypted in S93, and the acquired ID is compared with the ID registered in the communication permission device 3. To do. The ID information on the wireless communication device 21 side is allocated in the permission request signal and encrypted.
Next, in S94, the permission determination means 33 determines whether the acquired ID matches the registered ID.
If they match, the permission signal generation unit 32 transmits a permission signal to the wireless communication device 21 in S95.
If they do not match, the permission signal generation means 32 transmits a non-permission signal to the wireless communication device 21 in S96.
<Processing Flow of Wireless Communication Device 21>
First, in S101, the wireless communication device 21 determines whether a communication link with the vehicle failure diagnosis device 1 is established.
If a communication link is established with the vehicle failure diagnosis apparatus 1, it is determined in S102 whether a communication link with the communication permission apparatus 3 is established.
If a communication link is established with the communication permission device 3, the permission request signal transmission unit 26 transmits a permission request signal to the communication permission device 3 in S103.
Next, in S104, it is determined whether a permission signal has been received from the communication permission device 3.
If a permission signal is received from the communication permission device 3, it is determined in S105 whether or not a communication link with the vehicle failure diagnosis device 1 is established.
If a communication link has been established with the vehicle failure diagnosis apparatus 1, it is determined in S106 whether a failure diagnosis command has been received from the vehicle failure diagnosis apparatus 1.
When a failure diagnosis command is received from the vehicle failure diagnosis apparatus 1, the failure diagnosis command is transmitted to the corresponding electronic control devices 24 and 25 in S107.
Next, in S108, it is determined whether diagnostic data has been received from the corresponding electronic control devices 24 and 25.
When diagnostic data is received from the electronic control units 24 and 25, the diagnostic data is transmitted to the vehicle fault diagnostic device 1 in S109.
The processing flow of the electronic control devices 24 and 25 is the same as that in FIG. 5 in the first embodiment.

<Overall processing flow>
Next, the overall processing flow will be described.
First, when the diagnosis is started, a communication link is established between the vehicle failure diagnosis apparatus 1 and the wireless communication apparatus 21. (S81). After the communication link is established, the wireless communication device 21 establishes a communication link with the communication permission device 3 (S102).
When the communication link with the communication permission device 3 is established, the wireless communication device 21 transmits a permission request signal to the communication permission device 3 (S103).
Upon receiving the permission request signal from the wireless communication device 21 (S92), the communication permission device 3 transmits a permission signal to the wireless communication device 21 according to the collation result (S95), as in the first embodiment.
When the wireless communication device 21 receives the permission signal (S104), it establishes a communication link with the vehicle failure diagnosis device 1 again (S105), and enters a diagnostic command reception waiting state (S106).
On the other hand, the vehicle failure diagnosis apparatus 1 transmits a diagnostic command to the wireless communication apparatus 21 while performing the process of transmitting and receiving the permission signal between the wireless communication apparatus 21 and the communication permission apparatus 3 (S84). When diagnostic data cannot be received from the device 21, the processes of S25 to S26 are repeated until the specified time has elapsed.
When the wireless communication device 21 receives a diagnosis command during the execution of the processes of S25 to S26 of the vehicle failure diagnosis apparatus 1 (S42), the diagnosis command is transmitted to the electronic control devices 24 and 25 (S43). The diagnostic data from 24 and 25 is transmitted (S45). When receiving the diagnosis data (S27), the vehicle failure diagnosis apparatus 1 displays the diagnosis result on the display means (S28).

As described above, the failure diagnosis apparatus according to the second embodiment permits wireless communication between the wireless communication unit 11 provided in the vehicle failure diagnosis apparatus 1 and the wireless communication unit 22 provided in the vehicle 2. When the permission signal generated by the permission signal generating means 32 is acquired by the wireless communication means 22, the wireless communication means 11 and the wireless communication means 12 have a permission signal generating means 32 for generating a permission signal. Wireless communication is allowed between them.
In addition, the failure diagnosis method of the second embodiment is a permission signal that permits wireless communication between the wireless communication means 11 provided in the vehicle failure diagnosis apparatus 1 and the wireless communication means 22 provided in the vehicle 2. The permission signal generation step for generating the permission signal, the permission signal acquisition step for acquiring the permission signal generated in the permission signal generation step by the wireless communication means 22, and the permission signal acquired by the wireless communication means 22 in the permission signal acquisition step The wireless communication means 11 and the wireless communication means 22 are permitted.
The failure diagnosis apparatus according to the second embodiment includes a vehicle failure diagnosis apparatus 1 having a wireless communication unit 11, a vehicle 2 having a wireless communication unit 22, and a communication permission apparatus 3 having a wireless communication unit 31. The vehicle 2 includes a permission request signal generating unit 26 that generates a permission request signal for requesting permission for wireless communication between the wireless communication unit 11 and the wireless communication unit 22, and the communication permission device 3 is a wireless communication unit. 11 and a permission determining means 33 for determining permission of wireless communication between the wireless communication means 22 and a permission signal generating means for generating a permission signal for permitting wireless communication between the wireless communication means 11 and the wireless communication means 22. When the permission signal is acquired from the communication permission device 3 by the vehicle 2, wireless communication between the wireless communication unit 11 and the wireless communication unit 22 is permitted.
With the above-described configuration, the vehicle 2 cannot perform wireless communication between the vehicle failure diagnosis device 1 and the vehicle 2 unless receiving a permission signal from the communication permission device 3. Security can be improved and theft of a fault diagnosis target can be prevented.
The determination of permission for wireless communication is performed by collating the received ID with a pre-registered ID. This makes it possible to easily and reliably determine whether to permit wireless communication.

Embodiment 3
"Constitution"
FIG. 11 is a block diagram showing the configuration of the failure diagnosis apparatus according to the third embodiment of the present invention.
In the third embodiment, the communication permission device 27 installed outside the vehicle 2 in the first and second embodiments is installed in the vehicle 2.
That is, a vehicle failure diagnosis apparatus 1 permission request signal outside the vehicle 2 is transmitted to the communication permission apparatus 27 in the vehicle 2, and a permission signal that is a result of determination by the communication permission apparatus 27 is transmitted to the vehicle failure diagnosis apparatus 1. It is configured to do. Other configurations are the same as those in the first and second embodiments. Note that the communication permission device 27 is connected to the electronic control devices 24 and 25 and the like via the communication line 23.

<Process flow>
Next, a processing flow of the failure diagnosis apparatus according to the third embodiment will be described with reference to FIGS.
FIG. 12 shows the flow of processing in the vehicle fault diagnosis apparatus 1, and FIG. 13 shows the flow of processing in the communication permission apparatus 27.

<Processing flow of vehicle fault diagnosis apparatus 1>
When the vehicle failure diagnosis apparatus 1 starts diagnosis, first, in S121, it is determined whether or not a communication link with the communication permission apparatus 27 is established. When the communication link is not established, a predetermined error display indicating that is displayed on the display means of the vehicle fault diagnosis apparatus 1 in S122.
If a communication link is established with the communication permission device 27, the permission request signal transmission unit 12 transmits a permission request signal to the communication permission device 27 in S123.
Next, in S124, it is determined whether a permission signal is received from the communication permission device 27. When a non-permission signal is received from the communication permission device 27 or when a permission signal is not received, a predetermined error display is displayed on the display means in S122.
If a permission signal is received from the communication permission device 27, it is determined in S125 whether a communication link with the wireless communication means 22 of the vehicle 2 is established. If the communication link has not been established, an error is displayed on the display means in S122.
If a communication link is established with the wireless communication unit 22, a failure diagnosis command is transmitted to the wireless communication unit 22 in S126.
Next, in S127, it is determined whether diagnostic data has been received from the wireless communication means 22. If diagnostic data is not received, an error is displayed on the display means in S122.
If diagnostic data is received from the wireless communication means 22, the failure diagnosis result is displayed on the display means in S128, and the diagnosis is terminated.

<Processing flow of communication permission device 27>
First, in S131, the communication permission device 27 determines whether or not a communication link is established with the vehicle failure diagnosis device 1.
If a communication link is established with the vehicle fault diagnosis apparatus 1, it is determined in S132 whether or not a permission request signal has been received from the vehicle fault diagnosis apparatus 1.
When the permission request signal is received from the vehicle failure diagnosis apparatus 1, vehicle information is acquired from the electronic control device 24 and the electronic control device 25 via the communication line 23 in S133. FIG. 14 is a diagram showing a vehicle diagnosis condition determination pattern. The vehicle information includes, for example, an ignition switch, a door open / close state detection switch, a door lock state detection switch, a portable remote control key collation result, and the like shown in FIG.
Next, when these pieces of vehicle information are acquired, it is determined in S134 whether or not the vehicle condition is satisfied. That is, it is determined whether the permission signal should be transmitted or the non-permission signal should be transmitted according to the determination pattern shown in FIG. For example, in the case of pattern 1, which is a non-permission determination pattern, the ignition switch is off, the door open / closed state detection switch is closed, and the door lock state detection switch is in the locked state. In S135, a non-permission signal is transmitted to the vehicle failure diagnosis apparatus 1 in S135. If the non-permission determination pattern shown in FIG. 14 does not apply, it is determined that a condition for failure diagnosis as a vehicle state is satisfied, and a permission signal is transmitted to vehicle failure diagnosis apparatus 1 in S136, and in S137. Then, a diagnosis command reception waiting state from the vehicle failure diagnosis apparatus 1 is entered, and it is determined whether a failure diagnosis command has been received from the vehicle failure diagnosis apparatus 1.
When a failure diagnosis command is received from the vehicle failure diagnosis apparatus 1, the received failure diagnosis command is transmitted to the electronic control device 24 and the electronic control device 25 via the communication line 23 in S138.
Next, in S139, it is determined whether diagnostic data is received from the electronic control unit 24 and the electronic control unit 25.
If the diagnosis data is received, the diagnosis data is transmitted to the vehicle failure diagnosis apparatus 1 in S140.
The processing flow of the electronic control devices 24 and 25 is the same as in the first and second embodiments.

As described above, the failure diagnosis apparatus according to the third embodiment permits wireless communication between the wireless communication means 11 provided in the vehicle failure diagnosis apparatus 1 and the wireless communication means 22 provided in the vehicle 2. When the permission signal generated by the permission signal generating means 32 is acquired by the wireless communication means 11, the wireless communication means 11 and the wireless communication means 12 have a permission signal generating means 32 for generating a permission signal. Wireless communication is allowed between them.
Further, the failure diagnosis method of the first embodiment is a permission signal for permitting wireless communication between the wireless communication means 11 provided in the vehicle failure diagnosis apparatus 1 and the wireless communication means 22 provided in the vehicle 2. The permission signal generation step of generating the permission signal, the permission signal acquisition step of acquiring the permission signal generated in the permission signal generation step by the wireless communication means 11, and the permission signal acquired by the wireless communication means 11 in the permission signal acquisition step The wireless communication means 11 and the wireless communication means 22 are permitted.
In addition, the failure diagnosis apparatus according to the first embodiment includes a vehicle failure diagnosis apparatus 1 having a wireless communication unit 11 and a vehicle 2 having a wireless communication unit 22. The vehicle failure diagnosis apparatus 1 is a wireless communication unit. 11 and permission request signal generating means 12 for generating a permission request signal for requesting permission for wireless communication between the wireless communication means 22 and the vehicle 2, the vehicle 2 is provided between the wireless communication means 11 and the wireless communication means 22. A vehicle failure diagnosis has permission determination means 29 for determining permission of wireless communication, and permission signal generation means 28 for generating a permission signal for permitting wireless communication between the wireless communication means 11 and the wireless communication means 22. When a permission signal is acquired from the vehicle 2 by the device 1, wireless communication between the wireless communication unit 11 and the wireless communication unit 22 is permitted.
With the configuration as described above, the vehicle failure diagnosis apparatus 1 is configured so that wireless communication between the vehicle failure diagnosis apparatus 1 and the vehicle 2 cannot be performed unless the permission signal is received from the communication permission apparatus 27. The security at the time of failure diagnosis is improved, and theft of the failure diagnosis target can be prevented.
The determination of permission for wireless communication is made by comparing the acquired state of the vehicle 2 with a pre-registered condition. This makes it possible to easily and reliably determine whether to permit wireless communication.

The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in the above embodiment includes all design changes and equivalents belonging to the technical scope of the present invention. For example, the failure diagnosis target is not limited to the vehicle 2.
Note that the vehicle failure diagnosis device 1 is the failure diagnosis means in the claims, the vehicle 2 is the failure diagnosis target, the communication permission devices 3 and 27 are the communication permission means, and the wireless communication means 11 is the first wireless communication means. The wireless communication means 22 is the second wireless communication means, the wireless communication means 31 is the third wireless communication means, the permission signal generating means 28 and 32 are the permission signal generating means, and the permission request signal generating means 12 and 26 are. Are permission request signal generating means, permission determining means 29 and 33 are permission determining means, permission signal generating means 32 is permission signal generating means, permission signal generating means 28, 32, S33 to 35, S93 to 95, S133. 136 is a permission signal generation step, permission request signal generation means 12, 26, S24, S103, S124 is a permission signal acquisition step, permission determination means 29, 33, S33-35, S93-95, S133-1 6 corresponds to the authorization process.

It is a block diagram which shows the structure of the failure diagnosis apparatus of Embodiment 1 of this invention. It is a flowchart which shows the flow of a process in the failure diagnosis apparatus for vehicles of Embodiment 1 of this invention. It is a flowchart which shows the flow of a process in the communication permission apparatus of Embodiment 1 of this invention. It is a flowchart which shows the flow of a process in the radio | wireless communication apparatus of the vehicle of Embodiment 1 of this invention. It is a flowchart which shows the flow of a process in the electronic controller of the vehicle of Embodiment 1 of this invention. It is a figure which shows the message structure of the permission request signal and permission signal of Embodiment 1 of this invention. It is a block diagram which shows the structure of the failure diagnosis apparatus of Embodiment 2 of this invention. It is a flowchart which shows the flow of a process in the failure diagnosis apparatus for vehicles of Embodiment 2 of this invention. It is a flowchart which shows the flow of a process in the communication permission apparatus of Embodiment 2 of this invention. It is a flowchart which shows the flow of a process in the radio | wireless communication apparatus of the vehicle of Embodiment 2 of this invention. It is a block diagram which shows the structure of the failure diagnosis apparatus of Embodiment 3 of this invention. It is a flowchart which shows the flow of a process in the failure diagnosis apparatus for vehicles of Embodiment 3 of this invention. It is a flowchart which shows the flow of a process in the communication permission apparatus of Embodiment 3 of this invention. It is a figure which shows the vehicle diagnostic condition determination pattern of Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Vehicle failure diagnosis apparatus 2 ... Vehicle 3 ... Communication permission apparatus 4 ... Portable remote control key 11 ... Wireless communication means 12 ... Permit request signal generation means 21 ... Wireless communication apparatus 22 ... Wireless communication means 23 ... Communication lines 24, 25 ... Electronic control device 26 ... permission request signal generating means 27 ... communication permission device 28 ... permission signal generating means 29 ... permission determining means 31 ... wireless communication means 32 ... permission signal generating means 33 ... permission determining means 201 ... sensors (keyless antenna)
202 ... Switches (door lock / unlock switch)
203 ... Actuators 204 ... Power supply circuit (vehicle battery drive)
211 ... Sensors (door open / closed state detection switch, door lock / unlock state detection switch)
212 ... Switches 213 ... Actuators (door lock / unlock motor)
214 ... Power supply circuit (vehicle battery drive)

Claims (7)

Having a permission signal generating means for generating a permission signal for permitting wireless communication between the first wireless communication means provided in the failure diagnosis means and the second wireless communication means provided in the failure diagnosis target;
When the permission signal generated by the permission signal generation means is acquired by the first wireless communication means or the second wireless communication means, the first wireless communication means and the second wireless communication means A failure diagnosis apparatus characterized by permitting wireless communication with a communication means. A failure diagnosis means having a first wireless communication means, a failure diagnosis target having a second wireless communication means, and a communication permission means having a third wireless communication means,
The failure diagnosis means has permission request signal generation means for generating a permission request signal for requesting permission for wireless communication between the first wireless communication means and the second wireless communication means,
The communication permission means includes permission determination means for determining permission of wireless communication between the first wireless communication means and the second wireless communication means, the first wireless communication means, and the second wireless communication means. Permission signal generating means for generating a permission signal for permitting wireless communication with the communication means,
When the permission signal is acquired from the communication permission unit by the failure diagnosis unit, wireless communication between the first wireless communication unit and the second wireless communication unit is permitted. A fault diagnosis apparatus characterized by that. A failure diagnosis means having a first wireless communication means, a failure diagnosis target having a second wireless communication means, and a communication permission means having a third wireless communication means,
The failure diagnosis target has permission request signal generation means for generating a permission request signal for requesting permission for wireless communication between the first wireless communication means and the second wireless communication means,
The communication permission means includes permission determination means for determining permission of wireless communication between the first wireless communication means and the second wireless communication means, the first wireless communication means, and the second wireless communication means. Permission signal generation means for generating a permission signal for permitting wireless communication with the communication means,
When the permission signal is acquired from the communication permission means by the failure diagnosis target, wireless communication between the first wireless communication means and the second wireless communication means is permitted. A fault diagnosis apparatus characterized by that. It comprises a failure diagnosis means having a first wireless communication means and a failure diagnosis object having a second wireless communication means,
The failure diagnosis means has permission request signal generation means for generating a permission request signal for requesting permission for wireless communication between the first wireless communication means and the second wireless communication means,
The failure diagnosis target includes permission determination means for determining permission of wireless communication between the first wireless communication means and the second wireless communication means, the first wireless communication means, and the second wireless communication means. Permission signal generation means for generating a permission signal for permitting wireless communication with the communication means,
When the permission signal is acquired from the failure diagnosis target by the failure diagnosis unit, wireless communication between the first wireless communication unit and the second wireless communication unit is permitted. A fault diagnosis apparatus characterized by that.   The failure diagnosis apparatus according to any one of claims 1 to 4, wherein the wireless communication permission determination is performed by comparing the received ID with a previously registered ID.   The failure diagnosis apparatus according to claim 1, wherein the wireless communication permission is determined by comparing the acquired state of the failure diagnosis target with a pre-registered condition. A permission signal generation step of generating a permission signal for permitting wireless communication between the first wireless communication means provided in the failure diagnosis means and the second wireless communication means provided in the failure diagnosis target;
A permission signal acquisition step of acquiring the permission signal generated in the permission signal generation step by the first wireless communication means or the second wireless communication means;
When the permission signal is acquired by the first wireless communication means or the second wireless communication means in the permission signal acquisition step, between the first wireless communication means and the second wireless communication means A failure diagnosis method comprising: a permission step of permitting wireless communication.

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