KR20020080011A - System And Method For Anti-Theft And Fault Isolation Of Vehicle Using Handsfree Device - Google Patents

Abstract

PURPOSE: A burglarproof and failure diagnosis system and a method for a car using a handsfree device is provided to perform burglarproof and self diagnosis functions by initially connecting the handsfree device to an ECU(Electronic Control Unit) of the car to install the handfree device, installing the car burglarproof and failure diagnosis functions, and mounting a mobile terminal on the handsfree device. CONSTITUTION: A handsfree device(20) performs a burglarproof function using an ESN(Electronic Serial Number) and a password of a mobile terminal(30), executes an internal installed self diagnosis program to perform a failure diagnosis function, and connects to a control center(40) through a wireless Internet function of the mobile terminal(30). A burglarproof device(10) performs the burglarproof alarm function, and stops the operation of a starting association power device according to the control of the handsfree device(20) for blocking an unlawful driving of a car by an other person. An ECU connector(15) connects an ECU of the car to the handsfree device(20) when initially installing the handsfree device(20).

Description

System and Method For Anti-Theft And Fault Isolation Of Vehicle Using Handsfree Device}

The present invention relates to theft prevention and fault diagnosis of a vehicle using a handsfree device. In particular, the electronic control unit (ECU) inside the vehicle is connected to the handsfree device itself to prevent theft as an electronic serial number (ESN) and a password of a mobile terminal. The present invention relates to an anti-theft and failure diagnosis system and method for a vehicle using a hands-free device that performs a failure diagnosis function by mounting a self-diagnosis program.

As the use of the internet has increased due to the expansion of high-speed communication networks, most Internet users are required to shop on the Internet, to make civil services related to government offices and various associations, to check and reserve transportation networks, and to perform social transactions such as financial transactions. I can handle all the tasks conveniently.

In addition, by conducting cyber lectures even in university lectures, various cyber colleges have been established where students can obtain their desired degree regardless of time and place, providing a wide range of university education opportunities for Internet users. Doing.

In particular, the service through the Internet mainly depends on the wired network, but in recent years, with the increase in the spread of mobile terminals such as mobile phones, PCS and IMT-2000 terminal or PDA terminal, the Internet users through the wireless network is expanding.

Wireless Internet using mobile terminal has the advantage that there is no restriction according to the place of use because it can support data transmission / reception while moving, which is not supported by wired network. As it is applied to various business fields, it creates considerable convenience and sales profit. .

For example, it can be applied to the field of automobile maintenance, which is intended to prevent the driver from wasting a lot of time and money due to a breakdown while driving a car. After accessing a web server in charge of maintenance through the wireless Internet, the car can be repaired by diagnosing a fault condition of the car and obtaining various information necessary for repair.

It can also be applied to the anti-theft field of automobiles, where all mobile terminals have an electronic serial number (hereinafter referred to as 'ESN'), which is a unique identification code for identification with other products. It uses the fact that the user sets and uses a password for the security function of the terminal itself. The engine control device installed inside the vehicle through the data port of the mobile terminal of these two pieces of code data (ESN, user password) The transmission to the power supply control device enables normal operation only when the code data transmission of the mobile terminal identical to the code data set by the engine control device or power supply control device is recognized, thereby preventing theft of the vehicle.

The application example described above will be described in more detail. In the case of a product which currently provides a real-time remote maintenance service using a mobile phone, data about driving conditions and whether there is a failure is collected from an electronic control system inside a vehicle that is being driven, When sending to a control center through a mobile phone, the control center analyzes the condition of the vehicle and notifies the driver, and if there is a problem with the car, transmits the result of the status analysis to the nearest designated repair shop, and automatically schedules the maintenance schedule. Remote maintenance service is available.

However, in the case of the service product described above, regardless of the driver's intention, the state information of the vehicle is always transmitted to the control center at regular intervals, thereby increasing the server, overall management and maintenance costs of the control center according to the operation. In other words, the cost burden increases as a separate device must be attached to the car in addition to the mobile phone in order to determine whether the car is broken down in real time and deliver status information. There is a disadvantage in that it is burdened, and the attached device always transmits the state information of the driving vehicle to the control center, so that there is a risk of another malfunction due to the electromagnetic waves of the device.

In addition, in the event of a breakdown of the car, regardless of the driver's intention, the control center manages all processes related to the vehicle maintenance, so that even the parts that can be maintained by the driver can be spent arbitrarily interpreting in the control center and spend unnecessary expenses.

Therefore, in order to alleviate the above-mentioned disadvantages, conventionally, only an additional connector for connecting an electronic control unit (ECU), which is an electronic control unit inside a vehicle, to a mobile phone is used, and the state of the vehicle can be remotely controlled using the wireless Internet of the mobile phone itself. A self-diagnostic method is proposed, in which case most self-drivers do not know where the ECU connector of the vehicle is located, and since most of the vehicle's electronics are inexperienced, it is possible that the mobile phone may be damaged by the wrong connector connection. In addition, since the driver must connect the driver's mobile phone and the vehicle's ECU with separate connectors for remote self-diagnosis, the driver must stop and connect the connector and use the mobile phone whenever the vehicle diagnosis is necessary. There is a feeling.

Therefore, it is difficult to diagnose the abnormality of the vehicle appearing while driving, and since the wireless Internet of the mobile phone must be continuously used whenever a fault is to be diagnosed, this also has a disadvantage in that communication cost is additionally burdened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to connect and install the ECU inside the vehicle at the time of initial installation of the hands-free device, and to install a separate connection or device by installing a vehicle theft prevention and fault diagnosis function. Without the driver to mount the mobile terminal on the hands-free device to complete all the connections necessary for anti-theft and self-diagnosis to perform the corresponding anti-theft and self-diagnostic function.

In addition, another object of the present invention, by mounting the self-diagnostic program for each vehicle type in the hands-free device to perform the corresponding failure diagnosis function, so as not to continue to use the wireless Internet during the real-time failure diagnosis, control the mobile terminal only if desired wireless Internet By connecting to the control center through the low cost of communication, it is possible to perform a self-maintenance or maintenance reservation of the vehicle.

1 is a schematic block diagram of an anti-theft and failure diagnosis system for a vehicle using a hands-free device according to the present invention.

2 is a flowchart illustrating a method for preventing theft of a vehicle using a hands-free device according to the present invention.

3 is a flowchart illustrating a method for diagnosing a failure of a vehicle using a hands-free device according to the present invention.

Explanation of symbols on the main parts of the drawings

10 antitheft device 15 ECU connector

20: hands free device 21: liquid crystal display

22: audio signal input and output unit 23: microprocessor

24: memory section 25: function button section

30: mobile terminal 40: control center

Features of the present invention for solving the above object, while providing a hands-free function for the mobile terminal, performs the anti-theft function with the ESN and password of the mobile terminal, by executing a self-diagnostic program mounted therein A hands-free device which performs a diagnosis function and connects to a control center through a wireless Internet function of a mobile terminal which is mounted to enable self-maintenance or maintenance reservation by a driver when a failure is found; An anti-theft device, which performs an anti-theft alarm function and stops an operation of a vehicle related to the vehicle by another by stopping an operation of a start-related power supply under the control of the hands-free device; Theft of a vehicle using a hands-free device comprising a connector for receiving vehicle status information necessary for performing a fault diagnosis function of the hands-free device, the ECU connector connecting an ECU in the vehicle to a hands-free device at the time of initial installation of the hands-free device. To provide a prevention and fault diagnosis system.

The hands-free device may further include: a liquid crystal display configured to display a fault diagnosis result by a self-diagnosis program for the driver to check; An audio signal input / output unit implemented as a speaker and a microphone to output a voice for inputting a mobile terminal password required for driver confirmation when performing an anti-theft function, and output a fault alarm sound or a fault alarm voice when a fault is detected; A memory unit for storing a terminal ESN and a password required for the anti-theft function, and temporarily storing a vehicle diagnosis result of the vehicle performed by the self-diagnosis program; A function button unit having a function button for a real-time failure diagnosis command of a vehicle and a wireless internet access command required for a remote maintenance service; Includes a microprocessor to prevent theft and trouble diagnosis of the vehicle by processing the status of the external device, button input of the function button unit, display of the diagnosis results by the self-diagnosis program, and operations and commands for the transmission and reception of various information Characterized in that.

In addition, another aspect of the present invention includes the steps of: receiving a user authentication from the control center and automatically storing the allowed driver's mobile terminal ESN and password required for the anti-theft function in a hands-free device; When the mobile terminal is mounted on the hands-free device, checking whether the current driver is an authorized driver by inputting a terminal ESN and a password through the mounted mobile terminal; Hands-free device comprising the step of stopping the operation of the start-up power supply to enable the operation of the vehicle when the current driver is confirmed as an authorized driver and to disable the vehicle when the current driver is identified as an unauthorized driver. The present invention provides a method for preventing theft of a vehicle.

Here, the process of confirming whether the current driver is a permitted driver includes: checking whether the terminal ESN automatically input from the mobile terminal mounted on the hands-free device is the same as the previously stored ESN; When the ESN of the mobile terminal and the pre-stored ESN are the same, requesting a password input of the mobile terminal to receive a terminal password from the current driver; Comparing the mobile terminal password received from the current driver with a previously stored password and confirming that the password is the same; Recognizing the current driver as an authorized driver if the input mobile terminal password is the same as the previously stored password, and recognizing the current driver as an unauthorized driver if the input mobile terminal password is not the same as the previously stored password. It is characterized by.

Further, another feature of the present invention, the process of performing a real-time failure diagnosis by receiving the vehicle status information via the ECU connector when a failure diagnosis command is input through the mobile terminal mounted on the hands-free device; If a failure is found, storing a failure diagnosis result including corresponding failure state information in an internal memory unit; The present invention provides a method for diagnosing a failure of a vehicle using a hands-free device, which includes a process of outputting a failure alarm through a speaker so that a driver can perform self-maintenance, and displaying a failure diagnosis result including the failure status information on a liquid crystal display. have.

In this case, the above-described failure diagnosis method of the vehicle using the hands-free device may further include displaying a corresponding diagnosis result on a liquid crystal display when a failure is not found as a result of performing the real-time failure diagnosis. Checking whether a wireless internet access command is input from a driver when a fault is found as a result of performing the real-time fault diagnosis; Controlling the mobile terminal to access a control center via wireless internet when a wireless internet access command is input; The method may further include transmitting a fault diagnosis result previously stored in the memory unit to a control center, and receiving a response, displaying the fault on the liquid crystal display or outputting a voice through a speaker so that the driver can perform a self maintenance or maintenance reservation. It is characterized by.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is to implement a vehicle diagnosis and theft prevention system using a vehicle hands-free device, which is equipped with a device that connects the hands-free device and the ECU in the vehicle in the hands-free device itself, a self-diagnostic program suitable for the user's vehicle After the vehicle is installed, the vehicle's failure is checked in real time, and if a failure is found, it is connected to the control center, which is a dedicated web server through the wireless Internet function of the mobile terminal, to receive self-maintenance or maintenance reservation service by the driver. When the vehicle is started, the anti-theft function can be provided by controlling the start using the ESN and the password of the mobile terminal.

The system for diagnosing and preventing theft of a vehicle using a handsfree device according to the present invention for implementing the same, as shown in FIG. 1, the handsfree device 20 equipped with the vehicle's failure diagnosis and theft prevention function is external. The mobile terminal 30 connected to the anti-theft device 10 and the ECU connector 15, which are devices, and equipped with a hands-free device 20 and a data cable, is provided with a fault diagnosis and theft prevention function mounted on the hands-free device 20. Remote control service is connected to the control center 40 through the wireless Internet function of the).

In addition, the internal structure of the hands-free device 20 which performs a vehicle diagnosis and theft prevention function includes a liquid crystal display 21, an audio signal input / output unit 22, a microprocessor 23, and a memory unit 24. And a function button portion 25.

When the function of each component described above is described in detail, the anti-theft device 10 may generate an alarm by performing door sensing, shock sensing, tilt sensing, and the like, which is a general vehicle anti-theft alarm function, and is built in the hands-free device 20. When it is confirmed that the driver is an abnormal driver when the anti-theft function of the microprocessor 23 is performed, the operation of the start-related power supply device is stopped under the control of the microprocessor 23 to block illegal driving attempts by others.

The ECU connector 15 refers to a connector for receiving the state information of the engine control device or the transmission control device attached to the inside of the vehicle, that is, the vehicle state information of the ECU required for fault diagnosis.

When the mobile terminal 30 is mounted on the hands-free device 20, the mobile terminal 30 transmits its own ESN to the microprocessor 23 through a data cable to perform driver confirmation, and the wireless Internet is controlled under the control of the microphone pro processor 23. It automatically connects to the control center 40 through the function to transmit the vehicle diagnosis result to the control center 40 and receives the response to the microprocessor 23 via the data cable.

The liquid crystal display 21 displays a vehicle diagnosis result (a diagnosis result of a self-diagnosis program and a failure status information) so that the driver can check the corresponding audio signal input / output unit 22 as a speaker and a microphone. It provides a hands-free function for the mobile terminal 30 and at the same time outputs a voice requesting the input of the mobile terminal password required for driver confirmation when the microprocessor 23 performs the anti-theft function, and detects a failure alarm sound or Output failure alarm voice.

The microprocessor 23 processes the state of the external device, button input of the function button 25, display of the diagnosis result by the self-diagnosis program, and processing and commands for transmitting and receiving various information to prevent theft of the vehicle and Perform fault diagnosis.

Herein, the anti-theft function of the microprocessor 23 will be described in detail. The terminal ESN and the user password inputted through the mobile terminal 30 mounted on the hands-free device 20 are stored in the memory unit 24. The driver check is performed to prevent theft of the vehicle compared to the user password, and when it is confirmed that the driver is abnormal, the anti-theft device 10 is controlled to stop the operation of the start-related power supply.

When the failure diagnosis function of the microprocessor 23 is described in more detail, a self-diagnosis program suitable for a vehicle model in which the hands-free device 20 is mounted is mounted, and the vehicle is connected to the vehicle via the ECU connector 15 at the time of the failure diagnosis command. Real-time fault diagnosis is performed by receiving the status information, and the result is stored in the memory unit 24 and displayed on the liquid crystal display unit 21 at the same time. When a fault is detected, the speaker of the audio signal input / output unit 22 is detected. It outputs a fault alarm sound or fault alarm sound and displays the fault diagnosis result including fault status information on the liquid crystal display 21. After connecting to the control center 40 transmits the fault diagnosis result of the vehicle stored in the memory unit 24 to the control center 40, the response thereto Transfer allows the driver to take to perform such self-maintenance or maintenance schedule.

The memory unit 24 stores the driver's terminal ESN and password required for the anti-theft function, and temporarily stores the fault diagnosis result of the vehicle performed by the self-diagnosis program of the microprocessor 23.

The function button unit 25 is provided with a function button for a command for executing a real-time failure diagnosis of a vehicle and a command for accessing a wireless Internet required for a remote maintenance service.

Referring to the operation of the anti-theft and failure diagnosis system of the vehicle using the hands-free device 20 according to the present invention configured as described above are as follows.

First, referring to FIG. 2 attached to the anti-theft operation of a vehicle, when the driver of the vehicle mounts his mobile terminal 30 on the hands-free device 20 mounted therein after boarding the vehicle, (Step S21), the microprocessor 23 of the hands-free device 20 compares the terminal ESN automatically input from the mounted mobile terminal 30 with the ESN pre-stored in the memory unit 24 (see step S21). Step S22).

In this case, when the ESN of the mobile terminal 30 mounted on the hands-free device 20 and the ESN previously stored in the memory unit 24 are the same, the corresponding microprocessor 23 may be a driver of the vehicle to prevent theft of the vehicle. It is checked whether the driver is a normal driver, and for this purpose, a voice for requesting a password input of the mobile terminal 30 is output through the speaker of the audio signal input / output unit 22 (step S23). When the password is input, the received mobile terminal password is compared with the password previously stored in the memory unit 24 to confirm whether it is the same (step S24).

Here, when the input mobile terminal password and the pre-stored password in the memory unit 24 are the same, the vehicle is allowed to operate because the current driver is a normal driver (step S25), and the input mobile terminal password and the memory unit ( If the password previously stored in 24) is not the same, the driver is controlled by the anti-theft device 10 so that the vehicle cannot be operated by stopping the operation of the vehicle (step S26). In addition to preventing illegal attempts to drive the vehicle by others, it is possible to prevent theft of the vehicle.

At this time, if the mobile terminal password inputted in step S24 and the password previously stored in the memory unit 24 are not the same, another embodiment according to the present invention may require re-entry of the password of the mobile terminal 30, thereby If the password pre-stored in the unit 24 and the terminal password re-entered the same, it is possible to recognize the current driver as an authorized normal driver to enable the driving of the vehicle.

In addition, even when the ESN of the mobile terminal 30 mounted on the hands-free device 20 and the ESN pre-stored in the memory unit 24 are not the same in step S21, the microprocessor 23 is abnormal for which no driver is currently allowed. The driver is recognized as a driver, and thus, the anti-theft device 10 is controlled to perform the operation of step S26 to stop the operation of the start-related power supply device so that the vehicle cannot be driven.

On the other hand, in the above-described anti-theft operation, when the driver of the vehicle loses or changes his mobile terminal 30 to use the new mobile terminal 30, the mobile terminal 30 is connected to the control center 40 and received user authentication to obtain the corresponding movement. ESN and password of the terminal 30 to be stored in the memory unit 24 as information for preventing theft, which is a control center (Wireless Internet) while the new mobile terminal 30 is mounted on the hands-free device 20 ( After the user accesses the user interface 40, the ESN and the password of the mobile terminal 30 are automatically stored in the memory unit 24 through the data cable under the control of the microprocessor 23.

In addition, since the anti-theft device 10 that generates an alarm by performing a door sensing, an impact sensing, a tilt sensing, etc. separately from the hands-free device 20 applied to the present invention, an unauthorized user who is not allowed hands-free Removing the device 20 can also prevent theft of the vehicle.

Next, the failure diagnosis operation of the vehicle using the hands-free device 20 according to the present invention can be described with reference to the accompanying drawings, Figure 3, before explaining this first describes the connection for theft prevention and failure diagnosis of the vehicle This eliminates the need for the driver to connect and disconnect the ECU connector 15 each time for theft prevention and fault diagnosis, since the hands-free device 20 is connected to the ECU connector 15 for initial installation. Therefore, after the hands-free device 20 is installed, the driver mounts his mobile terminal 30 on the hands-free device 20 to complete all connections necessary for theft prevention and fault diagnosis.

When the hands-free device 20 is installed, the self-diagnostic program suitable for the vehicle model corresponding to the vehicle is mounted on the hands-free device 20.

In this state, that is, the driver presses the self-diagnosis button of the function button unit 25 to diagnose the state of the vehicle while the mobile terminal 30 is mounted on the hands-free device 20 equipped with a predetermined self-diagnosis program. When command to perform the diagnosis (step S31), the microprocessor 23 transitions to the self-diagnosis mode to perform the real-time failure diagnosis function (step S32).

That is, the microprocessor 23 executes a self-diagnosis program and receives vehicle status information through the ECU connector 15 to perform real-time failure diagnosis, and displays the result on the liquid crystal display 21 so that the driver can check the result. At this time, while performing a real-time fault diagnosis, it is confirmed whether a fault is found (step S33), and if a fault is not found, the corresponding fault diagnosis result is displayed on the liquid crystal display 21 (step S34).

By the way, when a failure is found, the microprocessor 23 stores a failure diagnosis result including corresponding failure state information (fault position, failure cause, etc.) in the memory unit 24 (step S35), and inputs and outputs an audio signal. The failure alarm sound or the failure alarm sound is output through the speaker of the unit 22, and the failure diagnosis result including the failure status information is displayed on the liquid crystal display 21 (step S36).

Thereafter, the microprocessor 23 checks whether the driver presses the wireless Internet access button provided in the function button unit 25 for self maintenance or maintenance reservation, that is, whether the wireless internet access command is input from the driver. (Step S37).

At this time, when the wireless Internet access command is input from the driver, the microprocessor 23 controls the mobile terminal 30 connected with the data cable and accesses the control center 40 through the wireless Internet (step S38). By transmitting the diagnosis results of the vehicle stored in the unit 24 to the control center 40, and receives the response to display the result on the liquid crystal display 21 or the audio output through the speaker of the audio signal input and output unit 22, The driver of the vehicle can perform self maintenance or maintenance reservation (step S39).

In addition, in the present invention, when the driver has maintenance knowledge enough to self-maintenance on minor failures, a failure diagnosis result including failure status information displayed on the liquid crystal display 21 without a wireless Internet connection is provided. Report self-maintenance will be possible.

On the other hand, the anti-theft and failure diagnosis function of the vehicle using the hands-free device according to the present invention is not limited to the above-described embodiment, and various alternatives within the scope obvious to those skilled in the art related to the present invention, Can be modified and changed.

As described above, the present invention connects and installs the ECU inside the vehicle at the time of initial installation of the hands-free device and mounts the mobile terminal to the hands-free device without any connection or device by installing the vehicle theft prevention and fault diagnosis function. By doing so, all connections necessary for anti-theft and self-diagnosis are completed, and the corresponding anti-theft and self-diagnostic functions can be performed.

In addition, the present invention is equipped with a self-diagnostic program for each vehicle type in the hands-free device to perform the corresponding failure diagnosis function, it is not necessary to continue to use the wireless Internet during the real-time failure diagnosis, control the mobile terminal only if desired control over the wireless Internet By connecting to the center, it is possible to carry out self-maintenance or maintenance reservation of the vehicle at low communication costs.

Claims (13)

Provides hands-free function for the mobile terminal, performs the anti-theft function with the ESN and password of the mobile terminal, executes a self-diagnosis program mounted inside, performs a diagnosis function, and self-maintenance by the driver when a failure is found Or a hands-free device for accessing the control center through the wireless Internet function of the mobile terminal which is arranged to allow maintenance reservation; An anti-theft device, which performs an anti-theft alarm function and stops an operation of a vehicle related to the vehicle by another by stopping an operation of a start-related power supply under the control of the hands-free device; A connector for receiving vehicle state information necessary for performing a fault diagnosis function of the hands free device, comprising: an ECU connector for connecting an ECU in a vehicle to a hands free device at the time of initial installation of the hands free device; Theft prevention and fault diagnosis system of the used car. The method of claim 1, The mobile terminal, when mounted on the hands-free device, transmits the terminal ESN to the hands-free device through the data cable to perform driver confirmation, and automatically connects to the control center through the wireless Internet function under the control of the hands-free device. The anti-theft and fault diagnosis system of the vehicle using the hands-free device, characterized in that for transmitting the fault diagnosis result of the control center and receiving the response to the hands-free device. The method of claim 1, The hands-free device may include: a liquid crystal display configured to display a fault diagnosis result by a self-diagnosis program for a driver to check; An audio signal input / output unit implemented as a speaker and a microphone to output a voice for inputting a mobile terminal password required for driver confirmation when performing an anti-theft function, and output a fault alarm sound or a fault alarm voice when a fault is detected; A memory unit for storing a terminal ESN and a password required for the anti-theft function, and temporarily storing a vehicle diagnosis result of the vehicle performed by the self-diagnosis program; A function button unit having a function button for a real-time failure diagnosis command of a vehicle and a wireless internet access command required for a remote maintenance service; Includes a microprocessor to prevent theft and trouble diagnosis of the vehicle by processing the status of the external device, button input of the function button unit, display of the diagnosis results by the self-diagnosis program, and operations and commands for the transmission and reception of various information Theft prevention and fault diagnosis system of a vehicle using a hands-free device, characterized in that. The method of claim 3, wherein The microprocessor compares the terminal ESN and password received through the mobile terminal mounted in the hands-free device with the ESN and password pre-stored in the memory unit to perform driver verification to prevent theft of the vehicle, and to identify as an unauthorized driver. Theft prevention and failure diagnosis system of the vehicle using the hands-free device, characterized in that by controlling the anti-theft device to stop the operation of the power supply-related device. The method of claim 3, wherein The microprocessor receives the vehicle status information through the ECU connector at the time of the fault diagnosis command, performs real-time fault diagnosis, stores the result in the memory unit, and displays the result on the liquid crystal display, and detects the fault through the audio signal input / output unit when a fault is detected. A system for preventing theft and fault diagnosis of a vehicle using a hands-free device, which displays a fault diagnosis result including fault state information on a liquid crystal display. The method according to claim 3 or 5, The microprocessor connects to the control center via the mobile terminal and the wireless Internet when the wireless internet access command is transmitted, transmits a diagnosis result of the vehicle previously stored in the memory unit, and receives a response to allow the driver to perform self maintenance or maintenance reservation. Anti-theft and fault diagnosis system for a vehicle using a hands free device, characterized in that to display on the liquid crystal display or to output the audio through the audio signal input and output. Automatically storing the authorized driver's mobile terminal ESN and password required for the anti-theft function in a hands-free device after receiving user authentication from the control center; When the mobile terminal is mounted on the hands-free device, checking whether the current driver is an authorized driver by inputting a terminal ESN and a password through the mounted mobile terminal; Stopping the operation of the start-related power supply so that the vehicle can be operated when the current driver is confirmed as an authorized driver and the vehicle cannot be operated when the current driver is identified as an unauthorized driver. Theft prevention method of vehicle using hands free device. The method of claim 7, wherein The process of confirming whether the current driver is a permitted driver includes: checking whether the terminal ESN automatically input from the mobile terminal mounted on the hands-free device is the same as the previously stored ESN; When the ESN of the mobile terminal and the pre-stored ESN are the same, requesting a password input of the mobile terminal to receive a terminal password from the current driver; Comparing the mobile terminal password received from the current driver with a previously stored password and checking whether the password is the same; Recognizing the current driver as an authorized driver if the input mobile terminal password is the same as the previously stored password, and recognizing the current driver as an unauthorized driver if the input mobile terminal password is not the same as the previously stored password. Theft prevention method of the vehicle using the hands-free device, characterized in that. The method of claim 8, If the mobile terminal password received from the current driver is not the same as the pre-stored password, requesting a password re-entry of the mobile terminal to re-enter the corresponding mobile terminal password, and confirming whether the same is compared with the previously stored password. Theft prevention method of the vehicle using the hands-free device, characterized in that it further comprises. The method of claim 8, Recognizing the current driver as an unauthorized driver if the ESN of the mobile terminal mounted on the hands-free device is not the same, and stopping the operation of the start-related power supply device so that the vehicle cannot be operated. Theft prevention method of the vehicle using the hands-free device characterized in that. Performing a real-time fault diagnosis by receiving vehicle state information through an ECU connector when a fault diagnosis command is input through a mobile terminal mounted in the hands-free device; If a failure is found, storing a failure diagnosis result including corresponding failure state information in an internal memory unit; Diagnosis of a vehicle using a hands-free device, which includes a step of outputting a fault alarm through a speaker so that a driver can perform self-maintenance and displaying a fault diagnosis result including the fault status information on the liquid crystal display. Way. The method of claim 11, And displaying a corresponding diagnosis result on a liquid crystal display if a failure is not found as a result of performing the real-time failure diagnosis. The method of claim 11, Checking whether a wireless internet access command is input from a driver when a fault is found as a result of performing the real-time fault diagnosis; Controlling the mobile terminal to access a control center via wireless internet when a wireless internet access command is input; The method may further include transmitting a fault diagnosis result previously stored in the memory unit to a control center, and receiving a response, displaying the fault on the liquid crystal display or outputting a voice through a speaker so that the driver can perform a self maintenance or maintenance reservation. How to diagnose the failure of a vehicle using a hands-free device, characterized in that.