JP4581298B2 - Failure diagnosis apparatus and failure diagnosis method for keyless entry system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a failure diagnosis apparatus and failure diagnosis method for a keyless entry system suitable for use in failure diagnosis of an automobile keyless entry system.
[0002]
[Prior art]
2. Description of the Related Art In recent years, keyless entry systems that can lock and unlock doors without key operations have become widespread in automobiles. In this keyless entry system, when a transmitter (transmitter) is operated, radio waves of ID signal and application signal (for example, door lock / unlock signal) are transmitted from the transmitter to the receiver on the vehicle side, and the receiver receives this radio wave. The ID signal matches the ID of the receiver. If the ID matches, the actuator corresponding to the command corresponding to the command signal (for example, an actuator for locking or unlocking the door) ).
[0003]
By the way, such a keyless entry system sometimes fails, and it is necessary to perform failure diagnosis.
The occurrence of such a failure of the keyless entry system can be determined by a state such as “the door lock does not operate even when the transmitter door lock switch is pressed”. The operation procedure and signal transmission path in this case are as follows, and a failure has occurred in any of the following signal routes.
[0004]
(A) The user presses the door lock switch of the transmitter (the door lock switch is turned on).
(B) The transmitter recognizes that the door lock switch is turned on.
(C) The transmitter transmits radio waves (ID signal and door lock signal).
(D) The receiver ECU (vehicle side) receives radio waves (ID signal and door lock signal).
[0005]
(E) The receiver ECU decodes the radio wave, collates the ID signal (recognizes that it is a transmitter signal for the own vehicle), and recognizes it as a door lock signal.
(F) The receiver ECU energizes the door lock actuator.
(G) The door lock actuator is switched to the lock.
[0006]
As described above, the processes from (a) to (e) are the internal processing of the ECU or the determination processing via the radio wave, and it is difficult to investigate the failure part. This is because voltage signals can be easily measured directly, but internal processing (software) and radio signals are difficult to measure directly. In other words, if the measurement is to be performed directly, the facility becomes large, and the failure diagnosis cannot be performed easily.
[0007]
By the way, the problems in the transmission paths (a) to (e) are roughly divided into three factors: (A) transmitter failure, (B) receiver failure, and (C) ID signal mismatch. is there.
(A) A transmitter failure is a state in which a signal that matches the pressed switch is not output or a normal radio wave is not output, and is dealt with by replacing the transmitter.
[0008]
(B) A defective receiver is a state in which radio waves cannot be received or transmitted radio waves cannot be received correctly, and is dealt with by replacing the receiver ECU.
(C) ID signal mismatch means that the receiver normally receives the radio waves from the transmitter, but the ID code is different, so it is not output, and can be treated by changing the ID code registration.
[0009]
At present, for such a keyless entry system, for example, failure diagnosis is performed as follows.
First, a tester is connected to the receiver ECU (reception ECU on the vehicle body side) so that the radio wave reception status from the transmitter (transmitter) can be displayed on the display screen of the tester. When the transmitter switch is pressed (radio wave transmission) and the transmitter and receiver IDs match, and a legitimate application signal is received, the name of the pressed switch is displayed on the tester display screen. (Ie, application type) "is displayed. On the other hand, if the transmitter ID does not match the receiver ID, or if a normal application signal is not received, nothing is displayed on the display screen of the tester.
[0010]
By making it possible to verify the ID match in this way, it is possible to perform failure diagnosis of the keyless entry including the ID mismatch, that is, the transmission path from the above (a) to (e).
[0011]
[Problems to be solved by the invention]
However, in the failure diagnosis method using the tester described above, it is possible to diagnose that a failure has occurred in the route of (a) to (e) above, that is, in any part of the transmitter or receiver. The function of the tester alone cannot narrow down which of the failure factors (A) to (C).
[0012]
In other words, in the conventional failure diagnosis method, if the IDs of the transmitter and receiver do not match, or if a proper application signal is not received, nothing is displayed on the display screen of the tester. Can be determined, but it is not known where the failure is. In other words, it can be confirmed that there is no failure, but the cause of the failure has not yet been investigated. Therefore, if it becomes clear that a failure has occurred somewhere, the troublesome task of confirming and correcting each judgment part and determining whether the tester operates normally is repeated, and the failure part is investigated. Is a heavy work burden.
[0013]
Further, even if the transmitter and receiver are not in failure and the IDs of the transmitter and receiver do not match, a failure is diagnosed and various operations are required to investigate the cause of the failure. In particular, in the case of a vehicle handled by a dealer or the like, there is a case where the ID is not registered in the vehicle (the transmitter ID code is stored in the receiver). In this case as well, it is determined that the ID does not match, and the failure is investigated. Complicated work is required.
[0014]
The present invention was devised in view of the above-described problems, and provides a failure diagnosis apparatus and failure diagnosis method for a keyless entry system that can more easily narrow down the cause of failure based on the display of a tester or the like. For the purpose.
[0015]
[Means for Solving the Problems]
In order to achieve this goal, the present invention has the following gist configuration.
The trouble diagnosis device for keyless entry system of the present invention, a transmitter device for transmitting an actuating signal of the application corresponding to the identification signal and the switch operation of the switch operation, when detecting that the identification signal is a normal signal the It is for diagnosing a failure in a keyless entry system having a receiver device that controls the operation of an actuator device based on an actuation signal, and when the failure occurs in the keyless entry system, received signal information of the receiver device A communication content display device capable of displaying the communication content between the transmitter device and the receiver device is provided.
[0016]
The communication content display device includes a first state in which the identification signal and the operation signal are both normal signals, a second state in which the operation signal is a normal signal but the identification signal is not a normal signal, and a third state, at least the actuation signal is not a normal signal, the application name and the identification signal of the failure target by the mark indicating whether a regular, identifiable manner to display.
Therefore, the failure factor of the keyless entry system can be narrowed down by referring to the display of the communication content display device (the first claim).
[0017]
The communication content display device is preferably a removable tester member. As a result, the tester member can be attached to a required portion of the keyless entry system at the time of failure diagnosis, and the failure diagnosis can be easily performed (claim 2).
[0018]
A failure diagnosis method for a keyless entry system according to the present invention is a method for diagnosing a failure diagnosis for the keyless entry system using the failure diagnosis apparatus for a keyless entry system according to claim 1, wherein the failure is detected in the keyless entry system. When it occurs, the transmitter device is operated to transmit the identification signal and the activation signal, and based on the received signal information of the receiver device corresponding thereto, the transmitter content and the receiver are displayed on the communication content display device. A communication content display step for displaying communication content with the apparatus and a failure factor investigation step for narrowing down the failure factor from the communication content displayed in the communication content display step are provided.
[0019]
In the failure factor investigation step, if it is determined from the communication content display that the state is the first state, the failure factor is narrowed down to the communication system of the receiver device and the actuator device and the actuator device, and the communication content is If the second state is found from the display, the failure factor is narrowed down to the discrepancy between the identification signals. If the third state is found from the communication content display, the transmitter device is used instead. The communication content display step is performed again using another alternative transmitter device that uses the same type of radio wave as the transmitter device, and the cause of failure is narrowed down based on the communication content display in the communication content display step performed again ( Thus, claim 3).
[0020]
In the step of narrowing down the cause of failure based on the communication content display re-executed using the alternative transmitter device, if it is determined from the communication content display that the second state is present, the original transmitter device is It is preferable to narrow down the cause of failure (above claim 4).
In the step of narrowing down the cause of failure based on the communication content display performed again using the above alternative transmitter device, if it is determined from the communication content display that the state is the third state, 2 transmitters are used. Since the possibility of failure is extremely low, the failure factor may be narrowed down to the receiver device.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show a failure diagnosis apparatus and a failure diagnosis method for a keyless entry system according to an embodiment of the present invention.
As shown in FIG. 1, a keyless entry system 1 that is an object of the present apparatus and method includes a transmitter apparatus (hereinafter simply referred to as a transmitter) 2, a receiver apparatus (hereinafter referred to as a receiver ECU) 3, an actuator apparatus (hereinafter referred to as a receiver ECU). 4), which is provided to control the lock / unlock portion of each part of the automobile (hereinafter referred to as vehicle).
[0022]
In the case of the present embodiment, the keyless entry system 1 can perform a locking operation and an unlocking operation of the vehicle door and an unlocking operation of the trunk lid of the vehicle.
The transmitter 2 is a portable transmitter in which a switch (for example, a push button switch) for commanding each of the above-described operations (door lock, unlock, and trunk lid unlock) is provided for each operation. When each switch is pressed (operated), an identification signal (ID signal) unique to the transmitter and an operation signal (application signal) corresponding to the pressed switch are transmitted.
[0023]
When the receiver ECU 3 receives the signal (ID signal and application signal) transmitted from the transmitter 2, the receiver ECU 3 determines whether or not the received identification signal is a regular signal. If the identification signal is a regular signal, the receiver ECU 3 receives the received signal. The operation of the corresponding actuator 4 is controlled based on the application signal.
The actuator 4 is provided for each operation target. In this embodiment, a door lock actuator for locking the vehicle door, a door unlock actuator for unlocking the vehicle door, and a trunk lid unlock for unlocking the trunk lid of the vehicle. It has a lock actuator. The door lock actuator and the door unlock actuator may be configured integrally. Here, each actuator is denoted by reference numeral 4 without being distinguished.
[0024]
Such an actuator 4 can be operated according to a control signal from the receiver ECU 3, and when a door lock signal is transmitted from the receiver ECU 3, the door lock actuator is activated to lock the door of the vehicle, When the door unlock signal is transmitted from the receiver ECU 3, the door unlock actuator is activated to unlock the vehicle door. When the trunk lid unlock signal is transmitted from the receiver ECU 3, the trunk lid unlock actuator is activated to operate the vehicle. Unlock the trunk lid.
[0025]
By the way, such a failure of the keyless entry system may be caused by operating the transmitter 2, that is, even if the switch of the transmitter 2 is pressed, the operation corresponding to the switch is not performed or the operation corresponding to the switch. It becomes clear when different operations are performed.
The failure diagnosis device and the failure diagnosis method are used in such a case, and this failure diagnosis device is a communication content display device that is used by connecting to the receiver ECU 3 when a failure occurs in the keyless entry system 1. As a tester (tester member) 5. The tester 5 can be attached to and detached from the receiver ECU 3, and a conventional hardware configuration can be used.
[0026]
When the tester 5 is connected to the receiver ECU 3, the reception signal information of the receiver ECU 3 is inputted. The communication content between the transmitter 2 and the receiver ECU 3 is transmitted to the tester 5 based on the reception signal information of the receiver ECU 3. A display unit 5a for displaying is provided.
The communication content displayed on the display unit 5a is the type of application and whether or not the ID signal is normal. In other words, if the application type can be determined, for example, the application name is displayed so that the application type can be understood. At the same time, if the ID signal is a normal one, for example, a circle is displayed. Is displayed. If the application type cannot be determined, nothing is displayed regardless of whether the ID signal is normal or not.
[0027]
That is, when both the application signal and the ID signal are normal (first state), the display unit 5a indicates that the normal application type and the ID signal are normal (for example, a circle). When the application signal is normal but the ID signal is not normal (second state), the fact that the ID signal is not normal (for example, x mark) is displayed together with the normal application type. Is not a regular one (third state), nothing is displayed.
[0028]
For example, if the application signal is related to door locking and the ID signal is regular, “lock SW ○” is displayed as shown in FIG. 2A, and the application signal is related to door unlocking and ID. If the signal is normal, “unlock SW ○” is displayed as shown in FIG. 2B, and if the application signal is related to trunk lid unlock and the ID signal is normal, As shown in 2 (c), “trunk SW ○” is displayed. SW means a switch.
[0029]
If the application signal is applied to the door lock and the ID signal is not normal, “lock SW ×” is displayed as shown in FIG. 2D, and the application signal is applied to the door unlock and ID. If the signal is not normal, “Unlock SW ×” is displayed as shown in FIG. 2E. If the application signal is related to trunk lid unlock and the ID signal is not normal, As shown in 2 (f), “trunk SW ×” is displayed.
[0030]
If the application signal is not a regular one, “(no display)” is set as shown in FIG.
As shown in FIGS. 2A to 2C, when it is determined that the state is the first state, the failure factor can be narrowed down to the communication system between the receiver ECU 3 and the actuator 4 and the actuator 4 itself. Also, as shown in FIGS. 2D to 2F, when it is determined that the state is the second state, the failure factor can be narrowed down to the ID signal mismatch. And when it turns out that it is a 3rd state from no display as shown in FIG.2 (g), other alternative transmitters which use the same kind of electromagnetic wave as the transmitter 2 used until now are used. It is possible to narrow down by performing the same operation as described above.
[0031]
Since the failure diagnosis apparatus for a keyless entry system according to an embodiment of the present invention is configured as described above, the failure diagnosis apparatus for a keyless entry system according to the present embodiment using the failure diagnosis apparatus as follows. Fault diagnosis can be performed. Hereinafter, description will be given with reference to the flowcharts of FIGS.
As shown in FIG. 3, it is first determined whether or not the communication request flag of the tester is on (step a10). This tester communication request flag is turned on when the tester is activated. If the tester communication request flag is on, the process proceeds to step a20 to determine whether the ID match flag is on. This ID match flag is turned on when the ID transmitted from the transmitter 2 matches that of the receiver ECU 3.
[0032]
If the ID match flags match, the application type is determined (step a30), and then the application type and the ID match are displayed on the display unit 5a of the tester 5 according to the type of each application (communication content) Display step, steps a40, a50, a60). On the other hand, if the ID match flags do not match, after determining the type of application (step a70), the fact that the ID does not match the type of application is displayed on the display unit 5a of the tester 5 according to the type of each application. (Communication content display step, steps a80, a90, a100).
[0033]
In this way, from the information displayed on the display unit 5a of the tester 5, for example, if the application type is normal and the ID signal is also normal (steps a40, a50, a60, and FIGS. c)), failure factors can be narrowed down to the communication system between the receiver ECU 3 and the actuator 4 and the actuator 4 itself (failure factor investigation step).
[0034]
Further, from the information displayed on the display unit 5a of the tester 5, for example, if the type of application is normal but the ID signal is not normal (steps a80, a90, a100, FIGS. 2D to 2F). ), The failure factor can be narrowed down to the ID signal mismatch (failure factor investigation step).
If the application type is not normal, the display unit 5a of the tester 5 is not displayed as shown in FIG. 2 (g). In this case, the failure factor cannot be narrowed down. The above-described operation shown in FIG.
[0035]
That is, as shown in FIG. 4, the processing shown in FIG. 3 is performed using the original transmitter 2 (step b10), and if the display is made on the display unit 5a of the tester 5, the determination from step b20 to step b30 is performed. If the failure factor is narrowed down as described above (failure factor investigation step) and the display is not displayed on the display unit 5a of the tester 5, the process proceeds from the determination step b20 to step b40, and another transmitter 2 is used as shown in FIG. Perform the process shown.
[0036]
As a result, if information indicating that the application type is normal but the ID signal is not normal is displayed on the display unit 5a of the tester 5, the process proceeds from the determination step b50 to step b60, and the transmitter 2 has failed. And failure factors can be narrowed down (failure factor investigation step). On the other hand, if nothing is displayed on the display unit 5a of the tester 5, the process proceeds from the determination step b50 to step b70, and the failure factor can be narrowed down to the failure of the receiver body (receiver ECU) 3 and the failure factor. (Failure factor investigation step). In other words, if it turns out that the transmitter is in the third state again, it is very unlikely that both transmitters have failed, so it is appropriate to narrow down the cause of the failure to the receiver device. It becomes correspondence.
[0037]
Note that even if the display is as shown in FIGS. 2A to 2C, if a type of application different from the application of the switch that operated the transmitter 2 is displayed, failure factors can be narrowed down to the transmitter 2. .
As described above, according to the failure diagnosis apparatus and failure diagnosis method of this keyless entry system, the display on the display unit 5a of the tester 5 can be seen whether the application is normal and whether the ID signal is normal. As a result of the improvements made by changing the software, the failure factor of the keyless entry system can be easily narrowed down. If the failure factor cannot be narrowed down, the failure factor that cannot be narrowed down can be easily narrowed down by using another alternative transmitter that uses the same type of radio wave. Therefore, it is possible to reduce the work for failure diagnosis.
[0038]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention, and failure diagnosis can be performed using a part of the configuration of the above-described embodiment. Even if it carries out, a suitable effect is acquired.
A keyless entry system that includes a transmitter that transmits an identification signal and an activation signal and a receiver that controls the operation of an actuator based on the activation signal when it is detected that the identification signal is a regular signal is not limited to a vehicle. Therefore, the present invention can be widely applied to failure diagnosis in such a keyless entry system.
[0039]
【The invention's effect】
As described above in detail, according to the failure diagnosis apparatus for the keyless entry system of the present invention, the communication content display apparatus includes the first state in which the identification signal and the operation signal are both normal signals, and the operation. Since the signal is a regular signal, the identification signal is displayed in a distinguishable manner between the second state where the identification signal is not a regular signal and at least the third state where the operation signal is not a regular signal. Referring to the failure factor of the keyless entry system can be narrowed down, and the work for failure diagnosis can be reduced.
[0040]
If the communication content display device is a removable tester member, the tester member can be attached to the required part of the keyless entry system when diagnosing a failure, and the tester member can be removed from the keyless entry system in other cases. The communication content display device does not get in the way at normal times when failure diagnosis is not performed, and it is possible to easily perform failure diagnosis of a plurality of keyless entry systems with a single tester member. 2).
[0041]
According to the failure diagnosis method of the keyless entry system of the present invention, when it is determined from the communication content display in the failure factor investigation step that the communication state is the first state, communication between the receiver device and the actuator device is performed. If the failure factor is narrowed down to the system and the actuator device, and it is found from the communication content display that the communication state is the second state, the failure factor is narrowed down to the identification signal mismatch, so the failure factor can be easily narrowed down. The
[0042]
In addition, when it is determined from the communication content display that the communication state is the third state, the above communication content is replaced by using another alternative transmitter device that uses the same type of radio wave as the transmitter device instead of the transmitter device. The display step is performed again, and the failure factor is narrowed down based on the communication content display in the re-executed communication content display step. Therefore, even in the third state where it is difficult to narrow down the failure factor, there is a possibility of further narrowing down. It can be secured (claim 3).
[0043]
In the step of narrowing down the cause of failure based on the communication content display performed again using the above alternative transmitter device, if it is determined from the communication content display that the second state is present, the original transmitter device is By narrowing down the cause of failure, it is possible to easily narrow down the cause of failure (claim 4).
[Brief description of the drawings]
FIG. 1 is a configuration diagram illustrating a failure diagnosis apparatus for a keyless entry system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an example of display contents of a tester according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating a failure diagnosis apparatus and method for a keyless entry system according to an embodiment of the present invention.
FIG. 4 is a flowchart showing a failure diagnosis method for a keyless entry system according to an embodiment of the present invention.
[Explanation of symbols]
1 Keyless entry system 2 Transmitter device (transmitter)
3 Receiver device (receiver ECU)
4 Actuator device (actuator)
5 Tester (tester member) as a communication content display device
5a Display section of tester 5

Claims (4)

Controlling the actuation of the actuator device on the basis of a transmitter device for transmitting an actuating signal of the application corresponding to the identification signal and the switch operation of the switch operation, when detecting that the identification signal is a normal signal to the actuation signal A failure diagnosis device in a keyless entry system equipped with a receiver device,
When a failure occurs in the keyless entry system, a communication content display device capable of displaying the communication content between the transmitter device and the receiver device based on the received signal information of the receiver device is provided.
The communication content display device includes a first state in which the identification signal and the operation signal are both normal signals, and a second state in which the operation signal is a normal signal but the identification signal is not a normal signal, and a third state, at least the actuation signal is not a normal signal, by a mark the application name and the identification signal of the failure target indicating whether regular, characterized in that it identifiably indicated, keyless entry system Fault diagnosis device. 2. The failure diagnosis device for a keyless entry system according to claim 1, wherein the communication content display device is a removable tester member. A method for diagnosing the failure diagnosis of the keyless entry system using the failure diagnosis device of the keyless entry system according to claim 1,
When a failure occurs in the keyless entry system, the transmitter device is operated to transmit the identification signal and the activation signal, and the communication content display device based on the received signal information of the receiver device corresponding thereto A communication content display step for displaying the communication content between the transmitter device and the receiver device;
A failure factor investigation step for narrowing down the failure factor from the communication content displayed in the communication content display step above,
In the failure factor investigation step,
When it is determined from the communication content display that the first state is present, the failure factor is narrowed down to the communication system of the receiver device and the actuator device and the actuator device,
If it is determined from the communication content display that the state is the second state, the failure factor is narrowed down to the identification signal mismatch,
If it is determined from the communication content display that the state is the third state, the communication content display step is performed using another alternative transmitter device that uses the same type of radio wave as the transmitter device instead of the transmitter device. A failure diagnosis method for a keyless entry system, characterized in that the failure factor is narrowed down based on the communication content display in the communication content display step performed again. In the step of narrowing down the cause of failure based on the communication content display performed again using the above alternative transmitter device,
4. The failure diagnosis method for a keyless entry system according to claim 3, wherein, when it is determined from the communication content display that the state is the second state, a failure factor is narrowed down to the original transmitter device.

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