JP6940144B2 - Vehicle system - Google Patents

Description

The present disclosure relates to vehicle systems.

In recent years, vehicle theft cases have occurred by a method called relay attack. The relay attack occurs in an electronic key system (so-called smart entry system) that unlocks the vehicle door without the user operating the electronic key.

A relay that relays a signal from a legitimate electronic key is used for the relay attack. A well-known electronic key system unlocks a vehicle door or accepts an unlocking operation of a vehicle door when the electronic key is within a predetermined range with respect to the vehicle. This range is quite narrow for crime prevention. Normally, the electronic key system does not unlock the vehicle door or does not accept the unlocking operation of the vehicle door unless the user holding the electronic key is in close proximity to the vehicle.

However, in the relay attack, the relay acts on the electronic key system by transferring the signal from the electronic key to the vehicle so that the vehicle door is unlocked even when the electronic key is located outside the predetermined range. do.

Japanese Unexamined Patent Publication No. 2015-151714

The relay attack is a problem in that even the security function of the car security system can be illegally released. Well-known car security systems usually unlock (turn off) the security function when the vehicle door is unlocked. Since the relay attack can illegally unlock the vehicle door, it is possible to illegally unlock the security function at the same time as unlocking the vehicle door.

Therefore, according to one aspect of the present disclosure, it is desirable to be able to provide a vehicle system capable of suppressing unauthorized cancellation of the crime prevention function.

The vehicle system according to one aspect of the present disclosure includes detection means and control means. The detection means is configured to detect a specific signal in the vehicle transmitted through wiring in the vehicle when the vehicle door is unlocked. The unlocking action corresponds to the action performed in the vehicle to unlock the vehicle door. The control means is configured to release the security function of the car security system on condition that the specific signal is detected a plurality of times within a predetermined time based on the specific signal detected by the detection means.

This vehicle system is installed in, for example, a vehicle that unlocks a vehicle door based on a signal from a wireless electronic key. This vehicle system can be a retrofit system.
Well-known electronic key systems operate as follows. That is, in the first case where the unlocking operation is performed on the condition that the electronic key is close to the vehicle without the user's operation on the switch provided on the electronic key, the vehicle door is locked. Perform the unlocking operation. In other words, if the vehicle door is already unlocked, no unlocking operation is performed. On the other hand, in the second case in which the vehicle door is unlocked in response to the reception of the signal transmitted from the electronic key based on the user's operation on the switch provided on the electronic key, the vehicle door is locked. The unlocking operation is performed not only in the case but also when the lock is unlocked.

Therefore, in a well-known electronic key system, a plurality of continuous unlocking operations do not occur in the vehicle without a switch operation for the electronic key. Unlocking by relay attack corresponds to the first case above. This means that in the relay attack, once the vehicle door is illegally unlocked, the unlocking operation is not further performed by the electronic key system.

Therefore, in a vehicle system configured to release the security function on condition that the unlocking operation is performed a plurality of times, the security function is not released even if the vehicle door is illegally unlocked by a relay attack. Therefore, according to one aspect of the present disclosure, it is possible to suppress the occurrence of unauthorized release of the crime prevention function due to unauthorized unlocking of the vehicle door due to a relay attack.

According to one aspect of the present disclosure, the control means cancels the crime prevention function on condition that the second specific signal is detected within a predetermined time after the first specific signal is detected by the detection means. It may be configured as follows. In this case, a legitimate user can cancel the crime prevention function by performing the unlocking operation using the electronic key switch twice in succession. The predetermined time here can be, for example, 5 seconds or less.

According to one aspect of the present disclosure, the vehicle system may be mounted on a vehicle having an answerback function that operates at least one of a buzzer and a lamp mounted on the vehicle when unlocked.

In this case, as the specific signal, a signal transmitted through wiring in the vehicle to operate at least one of the buzzer and the lamp may be used. The answerback function works in conjunction with the unlocking operation of the electronic key system. Therefore, in the relay attack in which the continuous unlocking operation does not occur, the signal transmitted by the answerback function is not continuously detected. Therefore, by using the above signal, it is possible to suppress the occurrence of unauthorized release of the crime prevention function due to unauthorized unlocking of the vehicle door.

The specific signal may be a drive signal for the lock mechanism of the vehicle door. In the second case, the drive signal is generated even when the vehicle door is already unlocked, but in the first case, the drive signal is further generated when the vehicle door is already unlocked. Is usually not. Therefore, the cancellation of the crime prevention function based on the continuous detection of the drive signal is useful for suppressing the illegal cancellation by the relay attack.

The detection means detects, as the specific signal, a drive signal for the motor flowing through the wiring connected to the motor provided in the vehicle door lock mechanism, and the drive signal in which the motor operates in the direction of unlocking the vehicle door. It may be configured in.

According to one aspect of the present disclosure, the detection means may be configured to detect a specific signal in the vehicle transmitted through a communication bus (eg, a CAN® bus). Vehicles in which a plurality of electronic control devices cooperate by communication are known. In this vehicle, a signal flowing through the communication bus is generated as the unlocking operation is performed. Cancellation of the crime prevention function based on this signal is useful for suppressing unauthorized cancellation by a relay attack.

It is a block diagram which shows the schematic structure of a security system. It is a flowchart which shows the 1st control process which a control unit executes. It is a flowchart which shows the 2nd control process which a control unit executes. It is a block diagram which shows the structure of the security system of the 1st modification. It is a block diagram which shows the structure of the security system of the 2nd modification.

An exemplary embodiment of the present disclosure will be described below with reference to the drawings.
The security system 10 of the present embodiment is an electronic key system that unlocks a vehicle door based on a signal from a wireless electronic key 100, and is an electronic key that unlocks the vehicle door without any user operation on the electronic key 100. It is mounted on a vehicle 50 equipped with a key system (so-called smart entry system). Such a vehicle 50 includes a well-known four-wheeled vehicle.

The electronic key 100 is generally called a smart key or an intelligent key (registered trademark). The security system 10 is retrofitted to the vehicle 50 equipped with such an electronic key system.

The vehicle 50 is provided with a plurality of electronic control units (ECUs). FIG. 1 shows an electronic key ECU 60 and a body ECU 70. The electronic key ECU 60 controls the authentication of the electronic key 100. The electronic key ECU 60 is connected to a communication circuit 61 capable of communicating with the electronic key 100, and is configured to communicate with the electronic key 100 via a communication circuit 61 including an antenna 61A.

The antenna 61A and the communication circuit 61 include an antenna and a communication circuit for remote communication (not shown), and an antenna and a communication circuit for proximity communication, and are separated from the vehicle 50 by several meters by using the antenna and the communication circuit for remote communication. It communicates with the remote electronic key 100, and communicates with the electronic key 100 close to the vehicle 50 by using an antenna and a communication circuit for proximity communication.

The electronic key ECU 60 is configured to receive an operation signal from the legitimate electronic key 100 by communicating with the electronic key 100 via the communication circuit 61, accompanied by a process of determining the validity of the electronic key 100. Further, the electronic key ECU 60 is configured to receive an operation signal from the outer handle switch 65, provided that the legitimate electronic key 100 is in close proximity.

As is well known, the electronic key 100 includes a remote locking switch 101 and a remote unlocking switch 103. The user pressing the remote lock switch 101 corresponds to the user remotely locking the vehicle door. The user pressing the remote unlock switch 103 corresponds to the user remotely unlocking the vehicle door. In the following, remote locking and unlocking operations will be referred to as remote locking and unlocking operations, respectively.

When the remote lock switch 101 is pressed by the user, the electronic key 100 transmits a remote lock operation signal indicating that the operation has been performed to the electronic key ECU 60. When the remote unlock switch 103 is pressed, the electronic key 100 transmits a remote unlock operation signal indicating that the operation has been performed to the electronic key ECU 60.

When the electronic key ECU 60 receives a remote locking operation signal or a remote unlocking operation signal from a legitimate electronic key 100 by communication with the electronic key 100, the electronic key ECU 60 transmits the operation signal to the body ECU 70.

The outer handle switch 65 is provided on the outer handle of the vehicle 50. The outer handle switch 65 is provided, for example, as a push-type switch on the surface of the outer handle so as to be visible and operable from the user. In this case, when the user presses the outer handle switch 65 while the vehicle door is unlocked, the user locks the vehicle door at a position close to the vehicle door, and the vehicle door is locked. The user pressing the outer handle switch 65 while the vehicle is in the state corresponds to the user unlocking the vehicle door at a position close to the vehicle door. In the following, the locking operation and the unlocking operation at the proximity position of the vehicle door will be referred to as the proximity locking operation and the proximity unlocking operation, respectively.

The outer handle switch 65 is configured as a switch that turns on when the outer handle is pulled, depending on the vehicle manufacturer and vehicle type. In this case, pulling the outer handle while the vehicle door is locked corresponds to the user operating the vehicle door in close proximity.

The electronic key ECU 60 receives the proximity lock operation signal and the proximity unlock operation signal from the outer handle switch 65 on condition that the legitimate electronic key 100 is in close proximity, and receives the operation signal from the outer handle switch 65 as a body. It is transmitted to the ECU 70.

The body ECU 70 is communicably connected to the electronic key ECU 60 through the communication bus LN0. The communication bus LN0 is a communication bus that complies with the CAN (Control Area Network) communication standard or the LIN (Local Interconnect Network) communication standard.

The body ECU 70 executes a locking operation for locking the vehicle door in response to the locking operation signal input from the electronic key ECU 60, and unlocks the vehicle door in response to the unlocking operation signal input from the electronic key ECU 60. It is configured to perform an unlocking operation for.

Upon receiving the remote locking operation signal or the proximity locking operation signal, the body ECU 70 drives the motor 71A included in the door lock mechanism 71 to the wiring LN1 connected to the door lock mechanism 71 in order to rotate the motor 71A in the direction of realizing the locking of the vehicle door. Input a signal (positive drive voltage / current). The vehicle door is locked by the input of this drive signal.

When the body ECU 70 receives the remote unlock operation signal or the proximity unlock operation signal, the body ECU 70 is connected to the door lock mechanism 71 in order to rotate the motor 71A included in the door lock mechanism 71 in the direction of realizing the unlocking of the vehicle door. A drive signal (positive drive voltage / current) is input to the wiring LN2. The vehicle door is unlocked by the input of this drive signal. The locking operation and the unlocking operation correspond to the input operation of the drive signal to the door lock mechanism 71 (specifically, the motor 71A).

Further, the body ECU 70 is configured to execute a process for realizing the answerback function when executing the locking operation and the unlocking operation.
Specifically, the body ECU 70 inputs a drive signal to the hazard lighting circuit 73 to light the hazard lamp as one of the answerback functions, and lights the hazard lamp to the hazard lighting circuit 73. The hazard lighting circuit 73 is connected to the lamp system 73A of the vehicle 50, is activated according to a drive signal from the body ECU 70, and controls the lighting of the lamp system 73A to realize the lighting of the hazard lamp.

In addition, the body ECU 70 inputs a drive signal to the buzzer drive circuit 75 in order to output a response sound as one of the answerback functions, and causes the buzzer drive circuit 75 to output a response sound from the buzzer 75A. The buzzer drive circuit 75 is connected to the buzzer 75A and is activated according to the drive signal from the body ECU 70 to realize the output of the response sound from the buzzer 75A.

In addition, the body ECU 70 determines the locked state and unlocked state of the vehicle door based on a signal from a door lock position switch (not shown), and the vehicle door locks the unlocking operation based on the proximity unlocking operation signal. It is configured to run only when it is in. That is, the unlocking operation based on the proximity unlocking operation signal is not executed when the vehicle door is in the unlocked state. On the other hand, the body ECU 70 is configured to execute the unlocking operation based on the remote unlocking operation signal not only when the vehicle door is in the locked state but also when the vehicle door is in the unlocked state.

Such a feature of the unlocking operation of the vehicle door can be seen in various types of vehicles 50. In spite of the unlocked state, the unlocking operation based on the remote unlocking operation signal is the operation clearly intended by the user, and the remote unlocking operation can clearly respond to the operation. This is considered to be because it is convenient for the user. The security system 10 of the present embodiment utilizes the characteristics of such an unlocking operation to operate so as not to release the security function at the time of a relay attack.

As shown in FIG. 1, the security system 10 of the present embodiment includes a sensor group 11, an alarm device 13, a warning system 15, a control unit 20, and detection circuits 21, 23, 25.
The sensor group 11 is at least one sensor useful for crime prevention, for example, prevention of unauthorized entry into the vehicle interior, prevention of theft of a part or all of the vehicle 50, and prevention of mischief against the vehicle 50. Includes one sensor. An example of such a sensor is a vibration sensor that detects the vibration of the vehicle 50. The alarm device 13 is controlled by the warning system 15 and is configured to output an alarm sound.

The warning system 15 realizes a crime prevention function by using the sensor group 11 and the alarm device 13. Specifically, as one of the processes related to the crime prevention function, the warning system 15 is a process of causing the alarm device 13 to output an alarm sound when the vehicle 50 is in a specific state based on the detection signal regarding the state of the vehicle 50 from the sensor group 11. To execute. The warning system 15 may further control the immobilizer device (not shown) to prohibit the vehicle engine, or may further control the lighting of vehicle lamps such as headlights for intimidation. ..

The control unit 20 is configured to control the activation and deactivation of the security function, specifically the activation and deactivation of the alert system 15. Specifically, the control unit 20 is configured to operate and cancel the crime prevention function based on the input signals from the detection circuits 21, 23, 25.

The control unit 20 can include, for example, a CPU 20A and a memory 20B, and the CPU 20A can operate and cancel the crime prevention function by executing a process according to a program stored in the memory 20B. The memory 20B includes at least one or more of RAM, ROM, and NVRAM.

The detection circuit 21 is generated when the vehicle door is locked by detecting a drive signal (drive voltage / current to the motor 71A) flowing through the wiring LN1 between the body ECU 70 and the door lock mechanism 71. It is configured to detect a signal.

The detection circuit 23 is generated when the vehicle door is unlocked by detecting the drive signal (drive voltage / current to the motor 71A) flowing through the wiring LN2 between the body ECU 70 and the door lock mechanism 71. It is configured to detect the signal to be used.

In addition, the detection circuit 25 is configured to detect a drive signal to the hazard lighting circuit 73 flowing through the wiring LN3 for answerback accompanying the locking and unlocking operations.
FIG. 2 shows a first control process executed by the control unit 20 when the security function is released, in other words, when the warning system 15 is stopped. In the first control process, the control unit 20 waits until it detects the locking operation of the vehicle door (No in S110), and when it detects the locking operation (Yes in S110), it activates the warning system 15 to perform a crime prevention function. (S120). After that, the first control process is terminated.

In S110, when the control unit 20 receives a signal from the detection circuit 21 indicating that the drive signal (drive voltage or current) input to the door lock mechanism 71 from the body ECU 70 through the wiring LN1 is input, the control unit 20 performs a locking operation. Can be detected.

As another example, the detection circuit 25 has a signal indicating that the control unit 20 has detected a drive signal to the hazard lighting circuit 73 within a predetermined time T1 (for example, 1 second) after the input of the signal from the detection circuit 21. It may be configured to detect the locking operation when input from. That is, the detection of the locking operation by the control unit 20 corresponds to detecting the generation of signals for driving the door lock mechanism and / or answering back flowing with the locking operation of the body ECU 70 through the detection circuits 21 and 25. ..

FIG. 3 shows a second control process executed by the control unit 20 when the security function is operating, in other words, when the warning system 15 is operating. In the second control process, the control unit 20 waits until the unlocking operation of the vehicle door is detected (No in S210).

In S210, when the control unit 20 receives a signal from the detection circuit 23 indicating that the drive signal (drive voltage or current) input to the door lock mechanism 71 from the body ECU 70 through the wiring LN2 is input, the unlocking operation is performed. Can be detected.

As another example, the detection circuit 25 has a signal indicating that the control unit 20 has detected a drive signal to the hazard lighting circuit 73 within a predetermined time T1 (for example, 1 second) after the input of the signal from the detection circuit 23. It may be configured to detect an unlocking operation when input from. That is, the detection of the unlocking operation by the control unit 20 is to detect the generation of the door lock mechanism driving and / or answerback signal that flows with the unlocking operation of the body ECU 70 through the detection circuits 23 and 25. handle.

When the control unit 20 detects the unlocking operation (Yes in S210), the control unit 20 repeatedly determines whether or not the unlocking operation has been executed again from the detection time until the predetermined time TS elapses (S220, S230). .. Whether or not the unlocking operation is executed again can be determined by the same method as in S210. For example, when the detection circuit 23 again detects that the drive signal has been input from the body ECU 70 to the door lock mechanism 71 through the wiring LN2, the control unit 20 determines that the unlocking operation has been executed again. In this way, the control unit 20 determines whether or not the second (re) unlocking operation is executed within the predetermined time TS from the first (first) unlocking operation.

When the predetermined time TS elapses without the unlocking operation being executed again (Yes in S220), the control unit 20 shifts to S210 and waits until the first (first) unlocking operation is newly executed (S210). No).

On the other hand, when the control unit 20 determines that the unlocking operation has been executed again within the predetermined time TS from the first unlocking operation (Yes in S230), the control unit 20 stops the warning system 15 to perform the crime prevention function. Release (S240). After that, the control unit 20 ends the second control process.

The predetermined time TS is preferably set to, for example, 3 seconds to 5 seconds. When the locking operation is performed after the first unlocking operation and before the second unlocking operation is executed, the control unit 20 formally forms a predetermined time even before the predetermined time TS elapses. It is preferable that the TS is considered to have passed, a positive judgment is made in S220, and the process shifts to S210.

As described above, in the second control process, the control unit 20 is crime-prevented when the second unlocking operation following the first unlocking operation is executed within a predetermined time TS from the first unlocking operation. It cancels the function, and otherwise operates to maintain the security function.

As described above, the unlocking operation based on the unlocking operation using the outer handle switch 65 when the electronic key 100 is close to the vehicle 50 is executed only when the vehicle door is in the locked state. Even though the vehicle door is unlocked by the first unlocking operation, the second unlocking operation is further executed by the body ECU 70 in the remote unlocking switch of the electronic key 100. Only when 103 is operated twice in succession.

Therefore, the security function of the security system 10 of the present embodiment cannot be canceled by the relay attack method. In the conventional security system, the security function is illegally released at the same time as unlocking by the relay attack, but in the security system 10 of the present embodiment, the security function is not released even by unlocking by such a relay attack. Therefore, according to the present embodiment, it is possible to provide a robust security system against a relay attack.

On the other hand, the user can cancel the crime prevention function by pressing the remote unlock switch 103 of the electronic key 100 twice. Therefore, according to the present embodiment, it is possible to provide a convenient security system 10 that is robust against relay attacks and has excellent operability.

Although the exemplary embodiment of the present disclosure has been described above, it goes without saying that the present disclosure is not limited to the security system 10 of the above-described embodiment. For example, in order to suppress the unauthorized release of the security function by a relay attack, it is sufficient to release the security function on the condition that the unlocking operation is executed a plurality of times within a predetermined time. The security system 10 may be configured to release the security function on condition that the unlocking operation is executed three times.

In addition, in the above embodiment, the unlocking operation is detected by detecting the drive signal of the motor 71A flowing through the wiring LN2 connecting the door lock mechanism 71 and the body ECU 70, but the unlocking operation is the driving of the motor 71A. It may be detected by detecting the drive signal of the hazard lighting circuit 73 flowing through the wiring LN3 connecting the hazard lighting circuit 73 and the body ECU 70 without referring to the signal.

When the unlocking operation is executed by the body ECU 70, one or more signals including a signal for driving the door lock mechanism 71 and a signal for answer back are generated. The security system 10 can detect the unlocking operation based on any one or more of these one or more signals.

In addition, when the unlocking operation is executed by the body ECU 70, a specific message flows in the communication bus LN0. Such a specific message also does not occur multiple times in a row in a relay attack. Therefore, the security system 10 includes a detection circuit 31 connected to the communication bus LN0 as in the security system 30 of the first modification shown in FIG. 4, and the detection circuit 31 detects a specific message flowing through the communication bus LN0. It may be configured as follows. Regarding the security system 30 of FIG. 4, it may be understood that the parts having the same reference numerals as the security system 10 of the above-described embodiment have the same configuration as that of the above-described embodiment.

In the modified example shown in FIG. 4, when the detection circuit 31 detects a specific message in the second control process (FIG. 3), the control unit 20 can determine that the unlocking operation has been executed (S210, S230). That is, the control unit 20 performs a crime prevention function on the condition that the specific message on the communication bus LN0 is detected by the detection circuit 31 and then the specific message is detected again by the detection circuit 31 within the predetermined time TS. It may be configured to be released.

In addition, there are also known vehicles in which each vehicle door is provided with an independent individual door lock mechanism 81. In such a vehicle, as shown in FIG. 5, a door ECU 80, which is a dedicated electronic control device, may be provided between the body ECU 70 and the door lock mechanism 81 for each door lock mechanism 81.

In the example shown in FIG. 5, the door ECU 80 is communicably connected to the body ECU 70 via the communication bus LN0, and each of the door ECU 80s is connected to the corresponding door lock mechanism 81 via the wirings LN4 and LN5. Has been done. The door lock mechanism 81 includes a motor 81A, and when a drive signal (positive drive voltage / current) is input to the wiring LN4, the door lock mechanism 81 drives the motor 81A in the direction of locking the corresponding vehicle door, and drives the motor 81A to the wiring LN5. When (positive drive voltage / current) is input, the motor 81A is driven in the direction of unlocking the corresponding vehicle door.

In such a vehicle, the security system 10 detects a drive signal to the motor 81A flowing through the wirings LN4 and LN5 to the door lock mechanism 81 corresponding to one or more of the vehicle doors by using the detection circuits 21 and 23. It may be configured to do so. Similar to the above embodiment, the security system 10 can release the crime prevention function on condition that the unlocking operation is continuously performed a plurality of times within the predetermined time TS.

The functions of one component in the above embodiment may be distributed to a plurality of components. The functions of the plurality of components may be integrated into one component. Some of the configurations of the above embodiments may be omitted. At least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment. The embodiments of the present disclosure are all aspects contained in the technical idea identified from the wording described in the claims.

The correspondence between terms is as follows. The security system 10 corresponds to an example of a vehicle system, the detection circuits 21, 23, 25; 31 correspond to an example of detection means, and the control unit 20 corresponds to an example of control means.

10, 30 ... security system, 11 ... sensor group, 13 ... alarm, 15 ... warning system, 20 ... control unit, 20A ... CPU, 20B ... memory, 21,23,25,31 ... detection circuit, 50 ... vehicle, 60 ... Electronic key ECU, 61 ... Communication circuit, 61A ... Antenna, 65 ... Outer handle switch, 70 ... Body ECU, 71, 81 ... Door lock mechanism, 71A, 81A ... Motor, 73 ... Hazard lighting circuit, 73A ... Lamp system , 75 ... buzzer drive circuit, 75A ... buzzer, 80 ... door ECU, 100 ... electronic key, 101 ... remote locking switch, 103 ... remote unlocking switch, LN0 ... communication bus, LN1, LN2, LN3, LN4, LN5 ... wiring ..

Claims (9)

A vehicle system installed in a vehicle that unlocks a vehicle door based on a signal from a wireless electronic key.
A detection means for detecting a specific signal in the vehicle transmitted through wiring in the vehicle when the vehicle door is unlocked.
A control means for canceling the security function of the car security system based on the specific signal detected by the detection means, and
Equipped with a,
The specific signal is one or a set of signals generated for each unlocking operation.
In the detection means, the specific signal is detected a plurality of times by the unlocking operation occurring a plurality of times.
The control means is a vehicle system that cancels the crime prevention function on condition that the specific signal is detected a plurality of times within a predetermined time. The vehicle system according to claim 1.
The control means releases the crime prevention function on condition that the second specific signal is detected within the predetermined time after the first specific signal is detected by the detection means as the specific signal. Vehicle system. The vehicle system according to claim 1 or 2.
A vehicle system in which the predetermined time is 5 seconds or less. The vehicle system according to any one of claims 1 to 3.
The vehicle has an answerback function that operates at least one of a buzzer and a lamp mounted on the vehicle when unlocked.
A vehicle system in which the specific signal is a signal transmitted through wiring in the vehicle in order to operate at least one of the buzzer and the lamp by the answerback function. The vehicle system according to any one of claims 1 to 3.
The specific signal is a vehicle system that is a drive signal for the lock mechanism of the vehicle door. The vehicle system according to any one of claims 1 to 3.
The detection means is a drive signal for the motor flowing through the wiring connected to the motor provided in the vehicle door lock mechanism as the specific signal, and is a drive in which the motor operates in a direction of unlocking the vehicle door. Vehicle system that detects signals. The vehicle system according to any one of claims 1 to 3.
The detection means is a vehicle system that detects a specific signal in the vehicle transmitted through a communication bus (for example, a controller area network bus) as the wiring. A vehicle system installed in a vehicle that unlocks a vehicle door based on a signal from a wireless electronic key.
A detection means for detecting a specific signal in the vehicle transmitted through wiring in the vehicle when the unlocking operation of the vehicle door is performed, and
A control means for canceling the security function of the car security system based on the specific signal detected by the detection means, and
With
The detection means detects a drive signal for the lock mechanism of the vehicle door as the specific signal, and determines the drive signal.
The control means is a vehicle system that cancels the crime prevention function on condition that the drive signal as the specific signal is detected a plurality of times within a predetermined time. A vehicle system installed in a vehicle that unlocks a vehicle door based on a signal from a wireless electronic key.
A detection means for detecting a specific signal in the vehicle transmitted through wiring in the vehicle when the unlocking operation of the vehicle door is performed, and
A control means for canceling the security function of the car security system based on the specific signal detected by the detection means, and
With
The detection means is a drive signal for the motor flowing through the wiring connected to the motor provided in the vehicle door lock mechanism as the specific signal, and is a drive in which the motor operates in a direction of unlocking the vehicle door. Detect the signal and
The control means is for a vehicle that releases the crime prevention function on condition that the drive signal in which the motor operates in the direction of unlocking the vehicle door as the specific signal is detected a plurality of times within a predetermined time. system.

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