JPH09240431A - Vehicle burglary protective device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the vehicle burglary by detecting the breakage of an on-vehicle communication device. SOLUTION: The own car position data monitored by a GSP 8 is informed automatically to an operation center 9 by an on-vehicle communication device 7 through an automobile telephone 10. And an immobilizer unit 6 diagnoses the existence of abnormality of the GPS 8 and the on-vehicle communication device 7, and when it decides the abnormality, a warning is output in a car room, and furthermore, when a specific release code is not received for the time until a specific time passes, the immobilizer unit 6 gives an engine stop instruction to an engine controller 5 so as to stop the engine forcibly. In such a way, a burglary is prevented, by making the self-propelling of the vehicle impossible, when the GPS 8 or the on-vehicle communication device 7 is removed illegally or broken.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a vehicle anti-theft device.

[0002]

2. Description of the Related Art Conventionally, when a vehicle is stolen, a vehicle anti-theft device automatically informs the operation center of the vehicle's position, and the operation center informs the police of the position information and the police. It is known that the purpose is to get the stolen vehicle back.

[0003]

However, in the case of the conventional vehicle theft prevention device having a function of automatically reporting the position of the own vehicle to the operation center, a GPS (Global Positionin) for monitoring the position of the own vehicle is used.
If the thief finds out where in the car the system, car phone, control unit, etc. are installed, the location information can be easily stopped by destroying or removing it. , There was a problem that the recovery function could not be fully fulfilled.

The present invention has been made in view of the above conventional problems, and if a vehicle thief destroys or removes an in-vehicle communication system, it automatically detects it and stops the engine. It is an object of the present invention to provide a vehicle theft prevention device that prevents vehicle theft by preventing the vehicle from traveling by itself.

Further, according to the present invention, when the vehicle is stolen, the vehicle position is notified to a predetermined place, and a vehicle stop command transmitted from the predetermined place is received to forcibly stop the vehicle if it is traveling at a predetermined speed or less. Accordingly, it is an object of the present invention to provide a vehicle antitheft device that can enhance the safety of the surroundings and more reliably prevent theft.

Further, according to the present invention, an operation permitting ID code is set between the vehicle-mounted communication system and the immobilizer unit so that the vehicle-mounted communication system cannot operate unless the ID code is verified when the engine is started. It is an object of the present invention to provide a vehicle theft prevention device for ensuring security.

[0007]

A vehicle theft prevention device according to a first aspect of the present invention provides a vehicle position monitoring means for monitoring the position of the vehicle and vehicle position information monitored by the vehicle position monitoring means. An in-vehicle communication means for reporting to a predetermined place,
The key ID number transmitted from the key of the vehicle is received and collated, and the immobilizer unit which gives the engine start permission when the collation is established, and the presence / absence of abnormality of the own vehicle position monitor means and the in-vehicle communication means are diagnosed, and the abnormality is detected. When the diagnosis is made, an abnormality diagnosing means for warning the inside of the vehicle, and a failure judging means for giving an engine stop command to the immobilizer unit when a predetermined time has passed after the abnormality diagnosing means has made an error warning and the abnormality diagnosing means After the warning, when the predetermined release code is received before the engine is stopped by the immobilizer unit, the destruction determination canceling means for canceling the operation of the destruction determination means is provided.

According to a second aspect of the present invention, in the vehicle theft prevention device according to the first aspect, when the vehicle-mounted communication means receives a predetermined release code transmitted from a predetermined place, the destruction determination release means operates the destruction determination means. It is designed to be released.

According to a third aspect of the present invention, in the vehicle theft prevention device according to the first aspect, the destruction determination canceling means receives a predetermined cancellation code input from a vehicle-mounted keyboard and cancels the operation of the destruction determination means. It was done.

In the vehicle theft prevention device according to the first to third aspects of the invention, the vehicle communication means reports the vehicle position information monitored by the vehicle position monitoring means to a predetermined place such as an operation center. Further, the abnormality diagnosing means diagnoses the presence / absence of an abnormality between the vehicle position monitoring means and the vehicle-mounted communication means, performs a warning inside the vehicle when the abnormality is diagnosed, and after the warning, until a predetermined time elapses. If you do not receive the predetermined release code in
The destruction determination unit gives an engine stop command to the immobilizer unit to forcibly stop the engine of the vehicle. In this way, when the vehicle position monitor means or the vehicle-mounted communication means is illegally removed or destroyed, the vehicle cannot be self-propelled to prevent theft.

When the vehicle position monitor means or the vehicle communication means fails and the abnormality diagnosing means determines that an abnormality has occurred, the vehicle is not stolen, so it is not necessary to forcibly stop the engine, so the abnormality diagnosing means performs a warning. After that, the occupant does not operate the destruction determination means when a predetermined release code is input before the destruction determination means operates or when a predetermined release code sent from a predetermined location such as an operation center is received. To enable continuous operation.

According to another aspect of the present invention, there is provided a vehicle theft prevention device, the vehicle-mounted communication means for receiving a vehicle stop command transmitted from a predetermined place, and the vehicle speed being a predetermined speed when the vehicle-mounted communication means receives the vehicle stop command. If the speed is lower than that, a means for forcibly stopping the engine is provided.

In the vehicle theft prevention device of the fourth aspect of the invention, the user can make a telephone call or the vehicle-mounted theft determination means can automatically notify the vehicle theft to a predetermined location, for example, an operation center through the vehicle-mounted communication means, and the predetermined information can be obtained. When the vehicle stop command is transmitted from the location, when the vehicle-mounted communication unit receives the vehicle stop command, the forced stop unit compares the own vehicle speed with a predetermined speed, and if the vehicle speed is low, performs engine stop control.

As a result, when the thief is driving a stolen vehicle and is escaping, the vehicle is forcibly stopped at a speed below a predetermined speed to prevent the escape, and the vehicle can be carried away without affecting the surroundings. To prevent.

According to a fifth aspect of the invention, in the vehicle theft prevention device according to the fourth aspect, the vehicle position monitoring means for monitoring the vehicle position is provided, and the vehicle-mounted communication means carries out the engine stop control by the forcible stop means as well as the vehicle itself. It has a function of notifying the predetermined position of the vehicle position information monitored by the position monitoring means.

In the vehicle theft prevention device according to the fifth aspect of the invention, the stolen vehicle is forcibly stopped, and the vehicle position at the time of the stop is reported to a predetermined location by the vehicle-mounted communication means. With this, the location of the stolen vehicle can be confirmed and the vehicle can be recovered.

According to another aspect of the present invention, there is provided a vehicle theft prevention device which receives an in-vehicle communication information means for communicating with a predetermined place and a key ID number transmitted from a key of a vehicle and collates the received information. When it is established, the immobilizer unit that gives the engine start permission, the in-vehicle communication means and the ID code setting means that decides the ID code at the next engine start when the engine is stopped when the engine is stopped, and the immobilizer unit makes the ID code when the engine starts. The ID code set in the setting means is collated, and if the collation is not established, the communication function stopping means for disabling the operation of the vehicle-mounted communication means is provided.

In the vehicle theft prevention device according to the invention of claim 6, bidirectional communication is performed with a predetermined place, for example, an operation center through the vehicle-mounted communication means, and the necessary information transmitted from the predetermined place is received. And use it for driving.
However, in terms of information security, it is necessary to allow bidirectional communication with a predetermined place by means of the vehicle-mounted communication means only for a specific user. Therefore, when the engine is stopped, the ID code for the next start is automatically arranged between the immobilizer unit and the vehicle-mounted communication means, and if the ID code cannot be verified, the vehicle-mounted communication means performs bidirectional communication with a predetermined place. Do not allow and ensure information security.

[0019]

According to the present invention, the abnormality diagnosing means diagnoses the presence / absence of an abnormality in the vehicle position monitoring means and the vehicle-mounted communication means, and when the abnormality is diagnosed, the inside of the vehicle is warned and further destroyed. After this warning, the judgment means
When the prescribed time has elapsed, the engine stop command is given to the immobilizer unit to forcibly stop the engine of the vehicle.Therefore, if the vehicle position monitoring means or the vehicle communication means is illegally removed or destroyed, the vehicle can run by itself. It becomes impossible to prevent theft.

After the abnormality diagnosing means has issued a warning, the occupant inputs a predetermined release code before the destruction determining means operates, or a predetermined release code transmitted from a predetermined place such as an operation center is input. Since the destruction determination means is not operated when it is received, the vehicle can be continuously driven when the own vehicle position monitoring means or the in-vehicle communication means actually fails instead of the vehicle theft, and the vehicle theft can be prevented. , No inconvenience to legitimate users.

According to the fourth aspect of the present invention, when a vehicle is stolen, a vehicle stop command is transmitted from a predetermined location such as an operation center to the vehicle in question, and the vehicle-mounted communication means issues the vehicle stop command. When received, the forced stop means performs engine stop control if the own vehicle speed is lower than the predetermined speed, so if the thief is driving a stolen vehicle and is escaping, the speed will be below the predetermined speed. If this happens, it will be forced to stop to prevent its escape, and at the time of the forced stop, it will not adversely affect the surroundings.

According to the fifth aspect of the invention, in the vehicle theft prevention device of the fourth aspect, the stolen vehicle is forcibly stopped and the vehicle position at the time of the stop is notified to a predetermined place by the vehicle-mounted communication means. Therefore, it is possible to confirm the location of the stolen vehicle that cannot be self-propelled and go back to retrieve it, and it is possible to enhance the vehicle theft prevention effect.

According to the invention of claim 6, the ID code at the next start is automatically arranged between the immobilizer unit and the in-vehicle communication means when the engine is stopped, and if the ID code is not verified, the in-vehicle communication means is used. Since the two-way communication with the predetermined place is not allowed, the two-way communication with the predetermined place can be used for driving by using the in-vehicle communication means and the information security is ensured. You can also do it.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a common embodiment of the vehicle antitheft device according to the first, second and fourth inventions. The vehicle anti-theft device of this embodiment has a key 2 having a predetermined key ID number registered therein and having a transponder 1 capable of transmitting the key ID number signal, and an antenna 3 attached to a key cylinder of the vehicle. And the amplifier (AMP) 4, the engine controller (ECCS) 5 that performs engine control, and the key ID number from the transponder 1 received by the antenna 3 and amplified by the amplifier 4 are collated, and the collation of the key ID number is performed. When it is established, the engine start switch can be turned on, and when the engine start switch is turned on by the key 2, the start permission ID code is also collated with the engine controller 5, and when the collation is established, fuel injection control is performed on the engine controller 5 for the first time. Immobilizer unit (IMMC /
U) 6.

In addition to these components, the vehicle antitheft device has a control circuit 7a, a locator circuit 7b, and a modem circuit 7c. When each input signal satisfies a predetermined condition, it is determined that a theft has occurred, and a theft alarm issuance command and the theft alarm are issued. In-vehicle communication device (IVCS: In Vehicle) that outputs a generation report command
Communication System) 7 and G that gives the in-vehicle communication device 7 planar position information of the vehicle.
The PS 8 and the car telephone 10 that automatically dials a predetermined telephone number, here, the operation center 9 when the immobilizer unit 6 determines the occurrence of vehicle theft and transmits the theft occurrence and the vehicle position information are provided.

The vehicle antitheft device further includes a horn 11 when the immobilizer unit 6 determines that a vehicle theft has occurred.
Is provided continuously, and an alarm unit 13 for flashing and lighting the flasher lamp and the headlamp 12 to notify people around the occurrence of theft is provided. The alarm unit 13 also has a tilt sensor that provides a predetermined angle to a stolen vehicle such as a door, a trunk, or a hood that is opened without following a regular key operation or a keyless entry operation, or the vehicle is to be carried away by a wrecker. An alarm operation is also performed when it is detected that the above inclination has occurred.

The immobilizer unit 6 includes the key 2 described above.
Key ID number collation processing, starting permission ID code collation processing with the engine controller 5, and failure diagnosis processing of the vehicle-mounted communication device 7 and GPS8 at predetermined intervals to detect these abnormalities. Sometimes the warning lamp (W / L) 14 installed in the car is turned on,
At the same time, the operation center 9 is automatically notified through the car telephone 10 of the occurrence of a failure, and after a lapse of a predetermined time, the alarm unit 13 is caused to perform a theft alarm operation, and the vehicle speed detected by the speed sensor 15 is equal to or lower than a predetermined value. Occasionally, the engine controller 5 has a function of stopping fuel injection, and an alarm operation and an engine stop operation are performed when a cancellation command is received from the operation center 9 until a predetermined time elapses after the failure notification to the operation center 9 by the car telephone 10. It has a prohibition function.

Next, the operation of the vehicle antitheft device constructed as described above will be described with reference to the flowchart of FIG.
When the engine is started, the key ID number signal transmitted from the transponder 1 when the key 2 is inserted into the key cylinder and rotated is received by the antenna 3, and the amplifier 4
It is amplified by and transmitted to the immobilizer unit 6.

The immobilizer unit 6 collates the key ID number registered in advance with the key ID number from the transponder 1, and when the collation is established, the immobilizer unit 6 judges that it is a start operation by a regular key and the accessory switch and the key switch. Power on and connect the electrical system to the battery power supply.

Next, the immobilizer unit 6 collates with the engine controller 5 the start permission ID code that was previously agreed upon at the time of the last engine stop operation, and if the collation is established, the engine controller 5 is permitted to perform fuel injection control, and the engine is started. Is possible. If the ID code is not verified here, the engine controller 5 is not allowed to perform fuel injection control, so that the engine cannot be started even if the starter motor rotates, preventing theft due to an unauthorized key, and immobilizer unit 6 The engine controller 5 and the large-scale thief who replaces it entirely will also be discouraged from stealing, thereby preventing the vehicle theft.

Further, while the vehicle is traveling, the in-vehicle communication device 7 is set to G
The position information of the vehicle detected by the PS 8 is periodically notified to the operation center 9 through the car telephone 10, and the position information of the vehicle is monitored on the operation center 9 side.

However, when the thief steals the vehicle by some sophisticated means that cannot be prevented even by the vehicle theft function described above, and the vehicle is self-propelled, such an automatic position reporting function determines the position of the stolen vehicle. It is expected that the thief will take measures to destroy the in-vehicle communication device 7 and the GPS 8 so that he / she will not be able to report because he / she will report to the operation center 9.

In preparation for this, the immobilizer unit 6 is always equipped with the vehicle-mounted communication device 7 and the GPS according to the procedure shown in FIG.
The failure diagnosis 8 is periodically executed, and when an abnormality occurs, the operation center 9 is automatically notified. That is, the failure diagnosis is periodically executed (step S1), and if an abnormality has occurred (step S2), the warning lamp 14 in the vehicle is first turned on to notify the driver, and at the same time, the operation center 9 also has an abnormality. Is notified through the mobile phone 10 (step S3). Turning on the warning lamp 14 may cause some trouble even while the regular user is operating, but if the proper procedure operation that the regular user should know when the warning lamp 14 is turned on is taken. This is because the next alarm operation or engine stop processing is not performed.

If the warning lamp 14 is turned on and the cancellation command is not transmitted from the operation center 9 even after a predetermined time has elapsed, it is considered that the driving is performed by a thief (steps S4 to S6).

Then, a speed signal is fetched from the speed sensor 15, and if the speed is lower than a predetermined speed, an engine stop command is given to the engine controller 5 to stop the engine (steps S7 and S8), and the alarm unit 13 is operated to activate the horn 11. Is continuously sounded, and the flasher lamp and the head lamp 12 are blinked and lit to inform the surroundings that the vehicle is a stolen vehicle (step S9).

Even when it is determined that the vehicle is stolen in steps S4 to S6, if the vehicle speed is not lower than a predetermined value, the vehicle is forcedly stopped in order to prevent it from being affected by a sudden stop due to engine stop. The engine stop control is not performed and only the alarm operation is performed to inform the surroundings (steps S7 and S9).

Thus, in the vehicle theft prevention device according to the first embodiment, the vehicle-mounted communication device 7, the GPS 8 and the car phone are provided so that the thief cannot know his / her vehicle position by the operation center 9 and be tracked. When 9 is destroyed or removed, it is determined that the probability of theft is high, and the engine is forcibly stopped and the alarm action is used to prevent theft, and when the vehicle speed is high, the engine is forcibly stopped. It will prevent the adverse effects.

Next, a common embodiment of the vehicle antitheft device according to the first, third and fourth aspects of the present invention will be described with reference to FIG. The feature of this embodiment is that the immobilizer unit 6 periodically performs a failure diagnosis of the car telephone 10 in addition to the in-vehicle communication device 7 and the GPS 8, and turns on the warning lamp 14 at any failure diagnosis. 1
After turning on 4, the engine stop control and the alarm operation control are prohibited by inputting a predetermined release code through the keyboard 16 installed in the vehicle until a predetermined time elapses. And
Other configurations are common to those of the first embodiment shown in FIG.

In the second embodiment, the immobilizer unit 6 uses the step S in the flowchart of FIG.
After the warning lamp 14 is turned on, the cancellation code 5 is input by the user within a predetermined time using the keyboard 16 so that the engine stop operation and the alarm operation are not performed.

The cancellation code entered using the keyboard 16 is registered in advance by an authorized user. Therefore, the thief cannot decipher the unlock code and cannot enter the correct unlock code within a predetermined time. Therefore, if the in-vehicle communication device 7, GPS 8 or mobile phone 10 is destroyed or removed, an alarm is issued. The operation can be performed, and if the vehicle is traveling at a predetermined speed or less, the engine can be forcibly stopped to prevent theft.

If the authorized user is the on-vehicle communication device 7, GPS 8 or car telephone 10 and the warning lamp 14 is turned on, an alarm operation and engine stop are performed by inputting a predetermined release code through the keyboard 16. The operation can be prohibited, and the inconvenience of operability can be reduced.

In the first and second embodiments, the forced stop control of the engine is executed only when the speed is equal to or lower than the predetermined speed, but this is not particularly limited, and the present invention is not limited thereto. The embodiments of the inventions of claim 1 to claim 3 include a technique for performing forced stop control of the engine regardless of the traveling speed. In this case, the engine stop control can be performed in the same way as when the engine runs out of fuel.

Next, an embodiment of the vehicle antitheft device according to the invention of claims 4 and 5 of the present invention will be described with reference to FIGS. 4 and 5. The feature of the third embodiment is that if the car telephone 10 receives an engine stop command transmitted from the operation center 9, the immobilizer unit 6 looks at the vehicle speed of the speed sensor 15 and is equal to or less than a predetermined value. The controller 5 is forced to stop the engine, and at the same time, it is provided with a function of automatically transmitting the own vehicle position detected by the GPS 8 to the operation center 9 through the car telephone 10. Therefore, the other configurations are common to those of the first embodiment shown in FIG. 1, and the detailed description thereof will be omitted by giving the same reference numerals.

In the third embodiment, when the user notices the theft and calls the operation center 9 to report the stolen vehicle, the operation center 9 urgently issues a stop command to the stolen vehicle. When the car telephone 10 of the corresponding vehicle receives it, the immobilizer unit 6 gives an engine stop command to the engine controller 5 according to the procedure of the flowchart shown in FIG. 5, and forcibly stops the engine.

That is, it is periodically determined whether the engine stop command is sent from the operation center 9 (step S21), and if the engine stop command is received, it is determined whether the vehicle speed is equal to or lower than a predetermined value (step S2).
2).

If the vehicle speed is equal to or lower than the predetermined value, the immobilizer unit 6 gives an engine stop command to the engine controller 5, and the engine controller 5 stops the fuel injection control to forcibly stop the vehicle (step S
23) Further, the immobilizer unit 6 gives an alarm command to the alarm unit 13 to cause the horn 11, the flasher lamp, and the headlamp 12 to perform an alarm operation to inform the surroundings that the vehicle is a stolen vehicle (step S24).
At the same time, the immobilizer unit 6 gives a command to the in-vehicle communication device 7 to cause the operation center 9 to transmit the information on the current position detected by the GPS 8, that is, the stop position, to the operation center 9 through the car telephone 10 (step S25).

As a result, the operation center 9 which has received the report of the stolen vehicle can stop the stolen vehicle in an emergency and can also specify its current position to prevent the vehicle from being stolen.

If the vehicle speed at the time of receiving the engine stop command is faster than the predetermined speed, the forced stop control is not performed (step S22), and only the alarm operation is performed to identify the vehicle as a stolen vehicle. Is notified (step S24), and the vehicle position is transmitted to the operation center 9 (step S25). This prevents the surroundings from being adversely affected by the forced stop during high-speed traveling.

The embodiment of the invention of claim 4 is not limited to the above-described third embodiment, and includes a technique of performing forced stop control of the engine regardless of the traveling speed. To do. In this case, the engine stop control can be performed in the same way as when the engine runs out of fuel.

Next, an embodiment of a vehicle theft prevention device according to the invention of claim 6 of the present invention will be described with reference to FIGS. 6 and 7. In accordance with the spread of the car telephone 10, information may be bidirectionally communicated with a predetermined place, for example, the operation center 9, and information unique to each vehicle may be received from the operation center 9 and used. Information security, which ensures that only legitimate users can receive and obtain this information, becomes important.

Therefore, in the fourth embodiment, the in-vehicle communication device 7 includes a control circuit 7a, a locator circuit 7b, and a modem circuit 7.
In addition to c, an ID code setting unit 7d is provided for setting an activation ID code for the next start when the engine is stopped, and for collating the ID code with the immobilizer unit 6 when the engine is started. The other components are almost the same as those in the first embodiment shown in FIG. 1, and the same reference numerals are given and detailed description thereof will be omitted.

The on-vehicle communication device 7 periodically transmits the vehicle position detected by the GPS 8 to the operation center 9 through the car telephone 10, and the operation center 9
Now manage the current position of each vehicle. As in the first embodiment, the vehicle becomes a stolen vehicle, and the in-vehicle communication device 7, GPS
In the case where 8 is destroyed, the immobilizer unit 6 lights the warning lamp 14 and notifies the operation center 9 through the mobile phone 10, and if the release code is not transmitted from the operation center 9 within a predetermined time, the engine is forcibly forced. Perform stop control.

With such a function, the ID code setting section 7d of the vehicle-mounted communication device 7, as shown in the flow chart of FIG. 7, when the engine is stopped (step S31), the ID code at the next startup with the immobilizer unit 6 is set. The code is determined and saved (steps S32 and S33).

Next time, when the engine is newly started, the ID code registered in the ID code setting section 7d is collated between the immobilizer unit 6 and the vehicle-mounted communication device 7, and when the collation is established, this vehicle-mounted When all the functions of the communication device 7 are enabled and the vehicle-mounted communication device 7 requests information from the operation center 9 through the mobile phone 10, a code indicating that the ID code has been verified is simultaneously transmitted, and the operation center 9 side establishes this verification. After verifying the code, you will be sent the requested information. As a result, the security of communication information between the vehicle-mounted communication device 7 and the operation center 9 can be protected.

The vehicle anti-theft device according to the invention of claim 6 is not limited to the fourth embodiment shown in FIG. 6, and the vehicle-mounted antitheft device is also mounted in the second and third embodiments. The same can be realized by incorporating the ID code setting unit 7d in the communication device 7.

[Brief description of drawings]

FIG. 1 is a functional block diagram according to a first embodiment of the present invention.

FIG. 2 is a flowchart of a vehicle theft prevention processing procedure according to the above embodiment.

FIG. 3 is a functional block diagram according to a second embodiment of the present invention.

FIG. 4 is a functional block diagram according to a third embodiment of the present invention.

FIG. 5 is a flowchart showing a vehicle theft prevention processing procedure in the above embodiment.

FIG. 6 is a functional block diagram according to a fourth embodiment of the present invention.

FIG. 7 is an ID of the in-vehicle communication device according to the above embodiment
The flowchart of a code setting process.

[Explanation of Codes] 1 transponder 2 key 3 antenna 4 amplifier 5 engine controller 6 immobilizer unit 7 in-vehicle communication device 7a control circuit 7b rotary circuit 7c modem circuit 7d ID code setting unit 8 GPS 9 operation center 10 automobile phone 13 alarm unit 14 warning Lamp 15 Speed sensor 16 Keyboard

Claims (6)

[Claims] 1. A vehicle position monitor means for monitoring the position of the vehicle, an in-vehicle communication means for reporting the vehicle position information monitored by the vehicle position monitor means to a predetermined location, and a vehicle key The transmitted key ID number is received and collated, and the immobilizer unit that gives the engine start permission when the collation is established, and the presence / absence of abnormality of the own vehicle position monitor means and the in-vehicle communication means are diagnosed, and the abnormality is diagnosed. An abnormality diagnosing means for performing a warning inside the vehicle; and a destruction determining means for giving an engine stop command to the immobilizer unit when a predetermined time has elapsed after the abnormality diagnosing means performs an abnormality diagnosis and performs warning, and the abnormality diagnosing means. After the warning by, when a predetermined release code is received before the engine is stopped by the immobilizer unit, Serial fracture determination destruction judging release means antitheft device including a for releasing the operation of the unit. 2. The destruction determination canceling means cancels the operation of the destruction determining means when the onboard communication means receives the predetermined cancellation code transmitted from the predetermined place. Vehicle anti-theft device described. 3. The vehicle antitheft device according to claim 1, wherein the destruction determination cancellation means receives the predetermined cancellation code input from an in-vehicle keyboard to cancel the operation of the destruction determination means. . 4. An in-vehicle communication unit that receives a vehicle stop command transmitted from a predetermined place; and when the in-vehicle communication unit receives the vehicle stop command,
A vehicle theft prevention device comprising: a forced stop means for performing engine stop control if the vehicle speed is lower than a predetermined speed. 5. A vehicle position monitor means for monitoring a vehicle position, wherein the vehicle-mounted communication means monitors the vehicle position monitored by the vehicle position monitor means together with the engine stop control by the forced stop means. The vehicle anti-theft device according to claim 4, further comprising a function of reporting information to the predetermined place. 6. An immobilizer unit for receiving an in-vehicle communication information means for communicating with a predetermined place and a key ID number transmitted from a key of the vehicle and collating the same and giving an engine start permission when the collation is established. An ID code setting means for determining an ID code for the next engine start when the engine is stopped between the vehicle-mounted communication means and the immobilizer unit; and the immobilizer unit for setting the I code when the engine starts.
A vehicle theft prevention device comprising: a communication function stopping means for collating the ID code set in the D code setting means, and disabling the operation of the vehicle-mounted communication means if the collation is not established.