CN117193268A - Vehicle fault diagnosis method, device, equipment and system - Google Patents

Abstract

The application relates to a vehicle fault diagnosis method, device, equipment and system, and relates to the technical field of automobiles. The method is applied to a VCU of a vehicle fault diagnosis system, the vehicle fault diagnosis system further comprises a mobile terminal, and the vehicle comprises a WiFi module. The method comprises the following steps: the VCU acquires target operation of a user in a first preset time period after the vehicle is electrified, and opens a WiFi module for establishing near field communication connection with the mobile terminal when the target operation is the preset operation and meets a preset opening condition. Further, the VCU receives, through the WiFi module, a fault code request message sent by the mobile terminal, where the fault code request message is used to request to obtain fault code information of the target controller. Further VCU obtains the fault code information of the target controller and sends the fault code information of the target controller to the mobile terminal. Thus, the fault diagnosis of the vehicle is completed through the mobile terminal.

Description

Vehicle fault diagnosis method, device, equipment and system

Technical Field

The application relates to the technical field of automobiles, in particular to the technical field of fault diagnosis, and specifically relates to a vehicle fault diagnosis method, device, equipment and system.

Background

With the development of the automobile industry, automobiles are becoming more popular, the electrification degree is also becoming higher, and after-market diagnosis equipment of the automobiles is also being continuously upgraded.

Conventional automobile fault diagnosis needs to be connected to an on-board diagnosis system (on-board diagnostics, OBD) end of an automobile through a diagnosis device, and a professional technician analyzes and checks faults through fault codes detected by the diagnosis device, so that the diagnosis device commonly used after sale is often independent equipment and needs to spend a great deal of cost. In the remote diagnosis which is recently developed, the fault is remotely diagnosed by means of intelligent technical support, but the remote diagnosis needs to send a diagnosis instruction to a vehicle end by means of a network, and when communication is unstable, the diagnosis is easily failed, so that the progress of vehicle maintenance is seriously affected.

Disclosure of Invention

The application aims to provide a vehicle fault diagnosis method, device, equipment and system, which are used for realizing the fault diagnosis of a vehicle through a mobile terminal.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

according to a first aspect of the present application, there is provided a vehicle fault diagnosis method applied to a whole-vehicle-domain controller (vehicle control unit, VCU) of a vehicle fault diagnosis system, the vehicle fault diagnosis system further comprising a mobile terminal, the vehicle comprising a wireless fidelity (wireless fidelity, wiFi) module. The method comprises the following steps: the VCU acquires target operation of a user in a first preset time period after the vehicle is electrified, and opens a WiFi module for establishing near field communication connection with the mobile terminal when the target operation is the preset operation and meets a preset opening condition. Further, the VCU receives, through the WiFi module, a fault code request message sent by the mobile terminal, where the fault code request message is used to request to obtain fault code information of the target controller. Further VCU obtains the fault code information of the target controller and sends the fault code information of the target controller to the mobile terminal.

According to the technical means, in the vehicle fault diagnosis method provided by the application, the vehicle comprises the WiFi module, and the WiFi module is started under the condition that the target operation made by the user is the preset operation of the WiFi module and the preset starting condition is met, so that the near field communication connection with the mobile terminal is realized. Further, after the fault code request message sent by the user through the mobile terminal is received, the fault code information of the target controller is fed back to the mobile terminal, so that the fault code information can be obtained without configuring diagnosis equipment, the cost of vehicle fault diagnosis is reduced, interaction with a remote diagnosis background is not needed, and the problem that diagnosis cannot be performed under the condition of poor network signals is solved.

In one possible implementation manner, the target operation is to press a first key and a second key, where the first key and the second key are different cruise function keys, and when the target operation meets a preset starting condition, starting the WiFi module includes: and when the pressing time of the first key is longer than the second preset time and the pressing time of the second key is longer than the third preset time, starting the WiFi module by the VCU.

According to the technical means, the application provides a method for starting WiFi through a mode that a plurality of keys are pressed in sequence, so that a subsequent mobile terminal can establish near field communication connection with a vehicle through a WiFi module.

In one possible implementation manner, the VCU detects a voltage value of the cruise function key in response to power-up of the vehicle, determines that the cruise function key fails when the voltage value does not belong to a preset interval and the duration exceeds a fourth preset duration, and further stores failure code information of the cruise function key.

According to the technical means, whether the cruise function key fails or not is determined by detecting the voltage value of the cruise function key after the vehicle is electrified, so that the problem that a user cannot locate the reason of failure in starting after the cruise function key fails in starting the WiFi module is avoided, time and labor are wasted, and the user is prompted to start the WiFi module in other modes after the failure is detected.

In one possible implementation manner, the target operation is clicking on a preset area of a display screen of a vehicle machine of the vehicle, and if the target operation meets a preset starting condition, starting the WiFi module includes: and when the clicking times of clicking the preset area are larger than the preset times within the fifth preset time, starting the WiFi module by the VCU.

According to the technical means, the application provides a method for starting WiFi by clicking a display screen of a vehicle machine by a user, so that a subsequent mobile terminal can establish near field communication connection with a vehicle through a WiFi module.

In one possible implementation, the VCU acquires fault code information of the target controller and sends the fault code information of the target controller to the mobile terminal, including: in the case that the target controller includes a plurality of controllers, the VCU forwards the fault code information of each controller to the mobile terminal through the WiFi module after receiving the fault code information of each controller in the plurality of controllers.

According to the technical means, the application realizes the realization mode of responding to the fault code request message initiated by the user at the mobile terminal and providing the fault code information of a plurality of controllers for the user.

In one possible embodiment, the method further comprises: the VCU responds to the received fault code request message, controls the vehicle to disconnect the high-voltage connection, and stops responding to the high-voltage connection request sent by the controller of the vehicle until the vehicle is electrified again; and sending a message to be displayed to an instrument of the vehicle, wherein the message to be displayed is used for indicating that the vehicle is in a maintenance state, and the high-voltage connection is disconnected.

According to the technical means, after the fault code request message initiated by the user through the mobile terminal is received, the current vehicle is determined to be in the maintenance state, the risk of electric shock accidents is avoided by disconnecting high-voltage connection, the response to the high-voltage connection request is stopped, and the condition that the vehicle is electrified under high voltage during maintenance is ensured.

In one possible implementation, the vehicle fault diagnosis system further comprises a cabin controller (cockpit domain controller, CDC), the WiFi module being integrated with the VCU and/or CDC.

According to the technical means, in the vehicle fault diagnosis method provided by the application, the WiFi module can be integrated with the VCU or the CDC, so that after the WiFi is started, a user can establish near field communication connection with the vehicle through the WiFi module integrated with the CDC, and can also establish near field communication connection with the vehicle through the WiFi module integrated with the VCU, thereby enriching the selection of the user.

In one possible implementation manner, after the VCU establishes a near field communication connection with the mobile terminal through the WiFi module, the method further includes: receiving an update package sent by a mobile terminal through a WiFi module and identifying a controller to be updated; and updating the controller to be updated based on the update package.

In one possible implementation manner, after the VCU establishes a near field communication connection with the mobile terminal through the WiFi module, the method further includes: receiving a controller data request message sent by a mobile terminal through a WiFi module, wherein the controller data request message is used for requesting to acquire the operation data of a controller; and sending the operation data of the controller to the mobile terminal through the WiFi module.

According to a second aspect of the present application, a vehicle fault diagnosis method is provided, which is applied to a mobile terminal of a vehicle fault diagnosis system, the vehicle fault diagnosis system further includes a whole vehicle domain controller VCU, and the vehicle includes a WiFi module. The method comprises the following steps: and when the WiFi module is in an on state, the mobile terminal responds to the WiFi user name and the password input by the user, and near field communication connection between the mobile terminal and the vehicle is established through the WiFi module. Further, the mobile terminal acquires a fault code request message input by a user in a target application program (application), wherein the fault code request message is used for requesting to acquire fault code information of a target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer; and sending a fault code request message to the VCU through the WiFi module. Further, the mobile terminal receives the fault code information of the target controller sent by the VCU, and displays the fault code information of the target controller.

According to the technical means, in the vehicle fault diagnosis method provided by the application, the mobile terminal establishes near field communication connection with the vehicle through the WiFi module, and then logs in the target APP through the account number and the password authorized by the vehicle attribution manufacturer, and further realizes the acquisition of the fault code through the target APP. Because the account number and the password are managed and authorized by the vehicle attribution manufacturer, the use safety of the vehicle fault diagnosis system is ensured, and the situation of key data leakage is avoided.

According to a third aspect of the present application, there is provided a vehicle fault diagnosis system, including a VCU and a mobile terminal, the vehicle including a WiFi module. The VCU is used for acquiring target operation of a user in a first preset duration after the vehicle is powered on. The VCU is also used for starting the WiFi module when the target operation is a preset operation and the target operation meets a preset starting condition. The mobile terminal is used for responding to the WiFi user name and the password input by the user, and establishing near field communication connection between the mobile terminal and the vehicle through the WiFi module. The mobile terminal is also used for acquiring a fault code request message input by a user in the target application program APP, wherein the fault code request message is used for requesting to acquire fault code information of the target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer. The mobile terminal is also configured to send a fault code request message to the VCU via the WiFi module. The VCU is also used for acquiring the fault code information of the target controller and sending the fault code information of the target controller to the mobile terminal. The mobile terminal is also used for displaying fault code information of the target controller.

According to a fourth aspect of the present application, there is provided a vehicle fault diagnosis apparatus disposed in a VCU of a vehicle fault diagnosis system, the vehicle fault diagnosis system further including a mobile terminal, the vehicle including a WiFi module, the vehicle fault diagnosis apparatus including an acquisition unit, a processing unit, a receiving unit, and a transmitting unit. The acquisition unit is used for acquiring target operation of a user in a first preset duration after the vehicle is electrified. And the processing unit is used for starting the WiFi module and establishing near field communication connection with the mobile terminal under the condition that the target operation is a preset operation and the target operation meets a preset starting condition. The receiving unit is used for receiving a fault code request message sent by the mobile terminal through the WiFi module, wherein the fault code request message is used for requesting to acquire the fault code information of the target controller. And the acquisition unit is also used for acquiring the fault code information of the target controller. And the sending unit is also used for sending the fault code information of the target controller to the mobile terminal.

In one possible implementation, the target operation is an operation of pressing a first key and a second key, the first key and the second key being different cruise function keys. The processing unit is further configured to start the WiFi module when the pressing time of the first key is longer than the second preset time and the pressing time of the second key is longer than the third preset time.

In one possible implementation manner, the processing unit is further configured to detect a voltage value of the cruise function key in response to power-on of the vehicle, determine a fault of the cruise function key when the voltage value does not belong to a preset interval and the duration exceeds a fourth preset duration, and further store fault code information of the cruise function key.

In one possible implementation, the target operation is clicking on a preset area of the vehicle's on-board display screen. And the processing unit is further used for starting the WiFi module when the clicking times of clicking the preset area are larger than the preset times in the fifth preset time.

In a possible implementation manner, the receiving unit is further configured to receive fault code information sent by each of the plurality of controllers in a case where the target controller includes the plurality of controllers. And the sending unit is also used for forwarding the fault code information of each controller to the mobile terminal through the WiFi module after receiving the fault code information of each controller in the plurality of controllers.

In one possible embodiment, the processing unit is further configured to control the vehicle to disconnect the high voltage connection in response to receiving the fault code request message, and stop responding to the high voltage connection request sent by the controller of the vehicle until the vehicle is powered up again. The sending unit is also used for sending a message to be displayed to the instrument of the vehicle, wherein the message to be displayed is used for indicating that the vehicle is in a maintenance state, and the high-voltage connection is disconnected.

In one possible implementation manner, after the VCU and the mobile terminal establish a near field communication connection through the WiFi module, the receiving unit is further configured to receive, through the WiFi module, an update package sent by the mobile terminal and an identifier of the controller to be updated. And the processing unit is also used for updating the controller to be updated based on the update package.

In one possible implementation manner, after the VCU and the mobile terminal establish a near field communication connection through the WiFi module, the receiving unit is further configured to receive, through the WiFi module, a controller data request message sent by the mobile terminal, where the controller data request message is used to request to obtain operation data of the controller. And the sending unit is also used for sending the operation data of the controller to the mobile terminal through the WiFi module.

According to a fifth aspect of the present application, there is provided a vehicle fault diagnosis apparatus disposed at a mobile terminal of a vehicle fault diagnosis system, the vehicle fault diagnosis system further including a VCU, the vehicle including a WiFi module. The vehicle fault diagnosis device includes a processing unit, an acquisition unit, a transmission unit, a reception unit, and a display unit. And the processing unit is used for responding to the WiFi user name and the password input by the user when the WiFi module is in the on state, and establishing near field communication connection between the mobile terminal and the vehicle through the WiFi module. The acquisition unit is used for acquiring a fault code request message input by a user at the APP, wherein the fault code request message is used for requesting to acquire fault code information of the target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer. And the sending unit is used for sending the fault code request message to the VCU through the WiFi module. And the receiving unit is used for receiving the fault code information of the target controller sent by the VCU. And the display unit is used for displaying the fault code information of the target controller.

According to a sixth aspect of the present application, there is provided a VCU for deployment in a vehicle. The VCU includes a memory and a processor, the memory and the processor being coupled; the memory is for storing computer program code, the computer program code comprising computer instructions; when the processor executes the computer instructions, the VCU performs the vehicle fault diagnosis method provided in the first aspect and any possible implementation manner thereof.

According to a seventh aspect of the present application, there is provided a computer readable storage medium having stored therein instructions that, when executed on a VCU, cause the VCU to perform the vehicle fault diagnosis method provided in the first aspect and any one of its possible implementation manners.

According to an eighth aspect of the present application, there is provided a vehicle including the vehicle fault diagnosis apparatus provided in the sixth aspect described above.

According to a ninth aspect of the present application, there is provided a computer program product comprising computer instructions which, when run on a VCU, cause the VCU to perform the vehicle fault diagnosis method provided in the first aspect and any one of its possible embodiments.

Therefore, the technical characteristics of the application have the following beneficial effects:

(1) In the vehicle fault diagnosis method provided by the application, the WiFi module is integrated on the VCU, and the WiFi module is started under the condition that the target operation made by the user is the preset operation and the target operation meets the preset starting condition, so that the near field communication connection with the mobile terminal is realized. Further, after the fault code request message sent by the user through the mobile terminal is received, the fault code information of the target controller is fed back to the mobile terminal, so that the fault code information can be obtained without configuring diagnosis equipment, the cost of vehicle fault diagnosis is reduced, interaction with a remote diagnosis background is not needed, and the problem that diagnosis cannot be performed under the condition of poor network signals is solved.

(2) The application provides a plurality of modes for starting a WiFi module, which respectively comprise a mode of starting the WiFi by a single key or a plurality of key combinations, sequentially pressing a plurality of keys and clicking a display screen of a vehicle by a user, so that a subsequent mobile terminal can establish near field communication connection with the vehicle through the WiFi module.

(3) According to the vehicle fault diagnosis method provided by the application, the mobile terminal establishes near field communication connection with the vehicle through the WiFi module, and then logs in the target APP through the account number and the password authorized by the vehicle attribution manufacturer, and further realizes the acquisition of the fault code through the target APP. Because the account number and the password are managed and authorized by the vehicle attribution manufacturer, the use safety of the vehicle fault diagnosis system is ensured, and the situation of key data leakage is avoided.

(4) In the vehicle fault diagnosis method provided by the application, after the VCU establishes near field communication connection with the mobile terminal through the WiFi module, the VCU can also update the software data of the controller to be updated after receiving the update package sent by the mobile terminal and the identifier of the controller to be updated. The VCU may also send the operation data of the controller to the mobile terminal after receiving the controller data request message sent by the mobile terminal. Therefore, the data refreshing of the controller and the acquisition of the data stream are realized based on the WiFi module, and the convenience of the user in operating the controller through the mobile terminal is provided.

It should be noted that, the technical effects caused by any implementation manner of the second aspect to the ninth aspect may refer to the technical effects caused by the corresponding implementation manner in the first aspect, which are not described herein.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

FIG. 1 is a schematic diagram of a vehicle fault diagnosis system according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a further configuration of a vehicle fault diagnosis system according to an exemplary embodiment;

FIG. 3 is a flowchart illustrating a method of vehicle fault diagnosis according to an exemplary embodiment;

FIG. 4 is a flowchart illustrating yet another vehicle fault diagnosis method according to an exemplary embodiment;

FIG. 5 is a flowchart illustrating yet another vehicle fault diagnosis method according to an exemplary embodiment;

FIG. 6 is a block diagram of a vehicle fault diagnostic apparatus, according to an exemplary embodiment;

fig. 7 is a block diagram of yet another vehicle fault diagnosis apparatus according to an exemplary embodiment;

fig. 8 is a block diagram of a VCU, according to an example embodiment.

Detailed Description

Further advantages and effects of the present application will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present application by way of illustration, so that only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In the description of the embodiments, unless otherwise indicated, "/" means "or" and, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Further, "at least one", "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

In the related art, the conventional fault diagnosis of the automobile needs to be connected to the OBD end of the automobile through the diagnostic device to perform fault diagnosis, and the professional technician analyzes and checks the fault through the fault code detected by the diagnostic device. In the remote diagnosis which is recently developed, the fault is remotely diagnosed by means of intelligent technical support, but the remote diagnosis needs to send a diagnosis instruction to a vehicle end by means of a network, and when communication is unstable, the diagnosis is easily failed, so that the progress of vehicle maintenance is seriously affected.

In addition, a related art describes an integrated bluetooth module in a diagnostic device to realize connection of a mobile device through bluetooth, but this solution also requires configuration of the diagnostic device, which has no effect on cost reduction.

In order to solve the problems, the application provides a vehicle fault diagnosis method, device, equipment and system, wherein the method is applied to a VCU of a vehicle fault diagnosis system, the vehicle fault diagnosis system further comprises a mobile terminal, and a vehicle comprises a WiFi module. The method comprises the following steps: the VCU acquires target operation of a user in a first preset time period after the vehicle is electrified, and opens a WiFi module for establishing near field communication connection with the mobile terminal when the target operation is the preset operation and meets a preset opening condition. Further, the VCU receives, through the WiFi module, a fault code request message sent by the mobile terminal, where the fault code request message is used to request to obtain fault code information of the target controller. Further VCU obtains the fault code information of the target controller and sends the fault code information of the target controller to the mobile terminal.

In this way, in the vehicle fault diagnosis method provided by the application, the WiFi module is integrated on the VCU, and the WiFi module is started under the condition that the target operation made by the user is the target operation and the preset starting condition is met, so that the near field communication connection with the mobile terminal is realized. Further, after the fault code request message sent by the user through the mobile terminal is received, the fault code information of the target controller is fed back to the mobile terminal, so that the fault code information can be obtained without configuring diagnosis equipment, the cost of vehicle fault diagnosis is reduced, interaction with a remote diagnosis background is not needed, and the problem that diagnosis cannot be performed under the condition of poor network signals is solved.

Fig. 1 shows a vehicle fault diagnosis system, and the vehicle fault diagnosis method provided by the embodiment of the application can be applied to the vehicle fault diagnosis system shown in fig. 1, and is used for realizing the fault diagnosis of a vehicle through a mobile terminal. As shown in fig. 1, the vehicle fault diagnosis system 10 includes a VCU11, a mobile terminal 12, a plurality of key controls 13, a plurality of controllers 14, and a WiFi module 15 integrated with the VCU 11.

It should be noted that the vehicle fault diagnosis system 10 further includes a vehicle 16, and the vehicle 16 is disposed with the VCU11, the plurality of key controls 13, the plurality of controllers 14, and the WiFi module 15 integrated with the VCU 11.

The plurality of controllers 14 include controllers for meters (IP), CDC, battery management units (battery control unit, BCU), and power supply system assemblies (power distribute unit, PDU).

The WiFi module 15 enters an operation state after the user performs an opening operation, and when the mobile terminal 12 is connected with the WiFi module 15, the user name of the WiFi module needs to be input to inquire about the WiFi module 15, and then a password is input to realize the access of the WiFi module 15.

The VCU11 is connected with each of the plurality of key controls 13 through a hard wire, the VCU11 is connected with each of the plurality of controllers 14 through a CAN bus, and the VCU11 is wirelessly connected with the mobile terminal 12 through a WiFi module 15.

The mobile terminal 12 may be a smart phone, tablet computer, or other mobile device capable of installing an APP or using an applet, which is not particularly limited in the embodiments of the present application.

In some embodiments, based on the vehicle fault diagnosis system 10 shown in fig. 1, the following procedure is included between the devices in the vehicle fault diagnosis method provided by the present application.

The VCU11 may be configured to obtain a target operation of a user within a first preset duration after the vehicle 16 is powered on, and turn on the WiFi module 15 when the target operation is a target operation and the target operation meets a preset turn-on condition.

The mobile terminal 12 may be configured to establish a near field communication connection between the mobile terminal and the vehicle via the WiFi module in response to a WiFi username and password entered by the user.

The mobile terminal 12 may also be configured to obtain a trouble code request message entered by the user at the target APP.

The fault code request message is used for requesting to acquire fault code information of the target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer;

the mobile terminal 12 is further configured to send a fault code request message to the VCU11 through the WiFi module 15;

the VCU11 may also be configured to obtain fault code information of the target controller and send the fault code information of the target controller to the mobile terminal 12.

The mobile terminal 12 is also used to display fault code information for the target controller.

Fig. 2 shows another vehicle fault diagnosis system, and the vehicle fault diagnosis method provided by the embodiment of the application can be also applied to the vehicle fault diagnosis system shown in fig. 2, and is used for implementing the fault diagnosis of the vehicle through the mobile terminal. As shown in fig. 2, the vehicle fault diagnosis system 20 includes a VCU21, a mobile terminal 22, a plurality of key controls 23, a plurality of controllers 24, a CDC25, a gateway device (GW) 26, and a WiFi module 27 integrated with the CDC 25.

It should be noted that the vehicle fault diagnosis system 20 further includes a vehicle 28, and the vehicle 28 is disposed with the vcu21, the plurality of key controls 23, the plurality of controllers 24, the CDC25, the gateway device 26, and the WiFi module 27 integrated with the CDC 25.

Among the plurality of controllers 24 are an engine controller ECU, a thermal management system TMS, BCU, PDU, and the like.

In the vehicle fault diagnosis system 20 shown in fig. 2, the VCU21 is connected to the CDC25 and the plurality of controllers 24 through the gateway device 26, and the above-described connections are connected through the CAN bus; VCU21 is also connected to a plurality of key controls 23 via hard wires; the CDC25 is wirelessly connected to the mobile terminal 22 via a WiFi module 27.

In the vehicle fault diagnosis system 20 shown in fig. 2, the CDC25 receives a request sent by the mobile terminal 22 through the WiFi module 27, sends the request to a corresponding controller through the gateway device 26, collects reply messages of the controllers, and replies to the mobile terminal 22 through the WiFi module 27.

FIG. 3 is a flow chart diagram illustrating a vehicle fault diagnosis method according to some example embodiments. In some embodiments, the vehicle fault diagnosis method described above may be applied to the VCU11 in the vehicle fault diagnosis system 10 shown in fig. 1, and may also be applied to the VCU21 in the vehicle fault diagnosis system 20 shown in fig. 2. Hereinafter, the vehicle fault diagnosis method according to the embodiment of the present application will be described by taking the application of the vehicle fault diagnosis method to the VCU11 as an example.

As shown in fig. 3, the vehicle fault diagnosis method provided by the embodiment of the application includes the following steps S301 to S305.

S301, the VCU acquires target operation of a user within a first preset time period after the vehicle is electrified.

As one possible implementation manner, after the vehicle is powered on, the VCU detects a user operation signal received within a first preset period of time, and determines a target operation made by the user.

The operation signal may include a pressing signal sent by the user pressing the physical key, or may include a touch screen operation signal made by the user on the display screen of the vehicle. The first preset duration may be preset in the VCU by an operator of the vehicle fault diagnosis system, for example, the first preset duration may be 60 seconds, which is not limited in detail in the embodiment of the present application.

S302, the VCU starts the WiFi module when the target operation is a preset operation and the target operation meets a preset starting condition.

As a possible implementation manner, the VCU determines whether the target operation is a preset operation based on the target operation acquired in step S301, and further, if the target operation satisfies a preset on condition if the target operation is the preset operation. Further, the WiFi module is controlled to be started under the condition that the target operation meets the preset starting condition.

In some embodiments, in order to avoid security risks such as information leakage caused by incorrect login of the WiFi module, the WiFi module is preset to be in a hidden state, and only after the WiFi module is turned on based on a target operation, the WiFi module can be queried to connect.

In some embodiments, if the target operation is an operation of pressing a first key and a second key, where the first key and the second key are different cruise function keys, for example, cruise speed+ and cruise speed-, the WiFi module is turned on if the target operation meets a preset turn-on condition, including:

the VCU acquires operation signals included in the target operation, determines whether the target operation includes pressing operation signals for the first key and the second key, and determines whether the pressing time length of the first key is longer than a second preset time length and whether the pressing time length of the second key is longer than a third preset time length under the condition that the pressing operation signals for the first key and the second key exist. Further, if the pressing time of the first key is longer than the second preset time and the pressing time of the second key is longer than the third preset time, the VCU determines that the target operation meets the preset starting condition, and starts the WiFi module, otherwise, determines that the target operation does not meet the preset starting condition, and does not process the WiFi module.

Or the VCU acquires the target operation of the user in the first preset time in real time, starts to press the first key after detecting that the user presses the first key, stops timing after the first key is released, acquires the pressing time of the first key, and determines whether the pressing time of the first key is longer than the second preset time. Further, when the pressing time of the first key is longer than the second preset time, the VCU detects in real time whether the user presses the second key, starts to press the second key to count after detecting that the user presses the second key, stops counting after the second key is released, acquires the pressing time of the second key, and determines whether the pressing time of the second key is longer than the third preset time. Further, when the pressing time of the second key is longer than the third preset time, the VCU determines that the target operation meets the preset starting condition, and starts the WiFi module, otherwise, determines that the target operation does not meet the preset starting condition, and does not process the WiFi module.

In other embodiments, the VCU responds to the vehicle powering up, detects the voltage value of the cruise function button control, determines whether the voltage value is within a preset interval, if the collected voltage value does not belong to the preset interval and the duration is longer than a fourth preset duration, determines that the cruise function button fails, stores failure code information of the cruise function button, and feeds back the failure code information to the user through the vehicle display screen.

The preset interval comprises a voltage interval when the button control is in a pressed state and a voltage interval when the button control is in a released state.

In other embodiments, if the target operation is to click on a preset area of a display screen of a vehicle, and if the target operation meets a preset starting condition, starting the WiFi module includes:

the VCU acquires an operation signal included in the target operation, determines whether a clicking operation on a preset area of the display screen of the vehicle machine is included, and determines whether the clicking frequency of clicking the preset area is larger than the preset frequency within a fifth preset duration under the condition that the clicking operation exists. Further, in the fifth preset duration, when the number of clicks for clicking the preset area is greater than the preset number, the VCU determines that the target operation meets the preset starting condition, and starts the WiFi module, otherwise, determines that the target operation does not meet the preset starting condition, and does not process the WiFi module.

Or the CDC acquires click operation of the user on the preset area and determines whether the click times in the fifth preset time period are larger than the preset times. Further, when the CDC determines that the number of clicks of clicking the preset area is greater than the preset number within the fifth preset duration, sending an opening request message of the WiFi module to the VCU, and correspondingly, after receiving the opening request message sent by the CDC, determining that the target operation meets the preset opening condition, and opening the WiFi module by the VCU.

In other embodiments, if the target operation is an operation of pressing a third key, where the third key includes at least one key control, then, if the target operation meets a preset starting condition, starting the WiFi module includes:

the VCU acquires an operation signal included in the target operation, determines whether the target operation includes pressing of the third key, and determines whether the pressing duration of the third key is longer than a sixth preset duration when the pressing operation signal of the third key exists. Further, if the pressing time of the third key is longer than the sixth preset time, the VCU determines that the target operation meets the preset starting condition, and starts the WiFi module, otherwise, determines that the target operation does not meet the preset starting condition, and does not process the WiFi module.

It should be noted that, the first key may be a single key control or may be a plurality of key controls, where the VCU determines a pressing duration of the single key control if the first key is a single key control, and if the first key is a plurality of key controls, the VCU determines a pressing duration of the plurality of key controls pressed simultaneously.

The third button may be a cruise speed+button control, a cruise speed-button control, or a cruise speed+cruise speed-two button control, which is not limited in this embodiment of the present application.

In some embodiments, after the WiFi module is turned on, the VCU sends a signal that the WiFi module is turned on to the meter and the vehicle display, respectively, the meter responds to the signal, and displays a prompt that "vehicle WiFi is turned on", and the vehicle display responds to the signal, and displays the frame number of the vehicle and the vehicle terminal serial number.

It should be noted that, the user name of the WiFi may be defined as a controller name+a frame number, the login password may refer to the frame number or the vehicle terminal serial number, and setting time of the user name and the password may be set through an electric detection process after the frame number and the vehicle terminal serial number are written when the whole vehicle is off-line, so that the user name and the password of each vehicle may be ensured to be different through the frame number and the vehicle terminal serial number.

In the foregoing embodiment, the second preset duration, the third preset duration, the fourth preset duration, the fifth preset duration, and the sixth preset duration may be preset in the VCU by an operator of the vehicle fault diagnosis system, and the preset durations may be the same or different, for example, may be 3 seconds or 5 seconds, or may be 3 seconds, 4 seconds, 2 seconds, 5 seconds, and 10 seconds, respectively, which is not limited in particular in the embodiments of the present application.

It can be understood that the WiFi module is in a closed state after the vehicle is electrified, and the WiFi module can be opened only after target operation executed by a user meets a preset opening condition, so that the possibility that the WiFi module is maliciously connected is reduced, and the safety of vehicle data is ensured.

S303, the VCU receives the fault code request message sent by the mobile terminal through the WiFi module.

The fault code request message is used for requesting to acquire fault code information of the target controller.

As a possible implementation manner, after the VCU starts the WiFi module, the user establishes a near field communication connection between the mobile terminal and the vehicle by completing an operation of accessing the WiFi module to the mobile terminal, generates a fault code request message by the mobile terminal, and sends the fault code request message to the VCU by the WiFi module.

Correspondingly, the VCU receives the fault code request message sent by the mobile terminal through the WiFi module.

In some embodiments, in order to ensure the safety of the user, after the VCU receives the fault code request message sent by the mobile terminal through the WiFi module, it determines that the current vehicle needs to be repaired, so that the VCU controls the vehicle to disconnect the high voltage connection, and stops responding to the high voltage connection request sent by the controller of the vehicle until the vehicle is powered up again. Further, the VCU sends a message to be displayed to the vehicle's meter, the message to be displayed indicating that the vehicle's meter is displaying that the vehicle is in a maintenance state, and the high voltage connection has been broken.

It can be understood that after receiving the fault code request message sent by the user through the mobile terminal, it can be determined that the user is diagnosing the fault of the vehicle, that is, the vehicle is currently in a maintenance state, in order to ensure the safety of the user, avoid an electric shock accident, the VCU disconnects the high-voltage connection, and stops responding to the high-voltage connection request sent by other controllers, so that the vehicle is ensured to be free from electric shock risk during diagnosis maintenance.

In some embodiments, after the VCU and the mobile terminal establish a near field communication connection through the WiFi module, the user may also send an update package and an identifier of the controller to be updated to the VCU through the WiFi module.

Correspondingly, the VCU receives an update package sent by the mobile terminal and an identifier of a controller to be updated through the WiFi module; and updating the controller to be updated based on the update package.

In other embodiments, after the VCU and the mobile terminal establish a near field communication connection through the WiFi module, the user may further send a controller data request message to the VCU through the WiFi module, for requesting to obtain the operation data of the controller.

Correspondingly, the VCU receives a controller data request message sent by the mobile terminal through the WiFi module; and sending the operation data of the controller to the mobile terminal through the WiFi module.

S304, the VCU acquires fault code information of the target controller.

As a possible implementation manner, the VCU determines the controller identifier of the target controller included in the fault code request message based on the fault code request message received in step S303. Further, the VCU sends a fault code request message to the target controller based on the determined controller identifier of the target controller, so that the target controller returns fault code information after receiving the fault code request message.

S305, the VCU sends fault code information of the target controller to the mobile terminal.

As a possible implementation manner, after receiving the fault code information of the target controller sent by the target controller in the step S304, the VCU forwards the fault code information of the target controller to the mobile terminal through the WiFi module.

In some embodiments, the target controller includes a single controller or multiple controllers, and in the case that the target controller is a single controller, the VCU receives the fault code information of the single controller sent by the single controller, and forwards the fault code information of the single controller to the mobile terminal through the WiFi module.

In the case where the target controller is a plurality of controllers, the VCU transmits a fault code request message to each of the plurality of controllers and receives fault code information transmitted from each of the controllers. Further, after receiving the fault code information of each of the plurality of controllers, the VCU forwards the fault code information of each controller to the mobile terminal through the WiFi module.

It can be understood that in the vehicle fault diagnosis method provided in the above embodiment of the present application, a WiFi module is integrated on a VCU, and when a target operation made by a user is a preset operation and the target operation meets a preset opening condition, the WiFi module is opened to implement near field communication connection with a mobile terminal. Further, after the fault code request message sent by the user through the mobile terminal is received, the fault code information of the target controller is fed back to the mobile terminal, so that the fault code information can be obtained without configuring diagnosis equipment, the cost of vehicle fault diagnosis is reduced, interaction with a remote diagnosis background is not needed, and the problem that diagnosis cannot be performed under the condition of poor network signals is solved.

FIG. 4 is a flow chart diagram illustrating a vehicle fault diagnosis method according to some example embodiments. In some embodiments, the vehicle fault diagnosis method described above may be applied to the mobile terminal 12 in the vehicle fault diagnosis system 10 shown in fig. 1, and may also be applied to the mobile terminal 22 in the vehicle fault diagnosis system 20 shown in fig. 2. Hereinafter, the vehicle fault diagnosis method according to the embodiment of the present application will be described by taking the application of the vehicle fault diagnosis method to the mobile terminal 12 as an example.

As shown in fig. 4, the vehicle fault diagnosis method provided by the embodiment of the application includes the following steps S401 to S405.

S401, when the WiFi module is in an on state, the mobile terminal responds to the WiFi user name and the password input by the user, and near field communication connection between the mobile terminal and the vehicle is established through the WiFi module.

As one possible implementation manner, the mobile terminal responds to the WiFi user name input by the user, queries the WiFi service of the WiFi module, responds to the password input by the user after querying the WiFi service of the WiFi module, accesses the WiFi service provided by the WiFi module, and establishes near field communication connection between the mobile terminal and the vehicle through the WiFi module.

S402, the mobile terminal acquires a fault code request message input by a user at the target APP.

The fault code request message is used for requesting to acquire fault code information of the target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer.

As a possible implementation manner, the mobile terminal is internally provided with a target APP, the target APP is managed by a home manufacturer of the vehicle, and an account number and a password of the target APP which the user logs in need to be authorized by the home manufacturer. And the mobile terminal responds to the operation of the user in the target APP, and if the user selects the fault code acquisition service and selects the target controller from a plurality of controllers of the vehicle, a fault code request message is generated according to the target controller.

In some embodiments, the mobile terminal may exemplarily store the fault code request message template in the target APP according to the fault code request message generated by the target controller, and only need to replace the controller identifier with the controller identifier of the target controller, so after the mobile terminal determines the target controller selected by the user, the mobile terminal performs replacement of the controller identifier in combination with the fault request message template, to obtain the fault code request message for requesting to obtain the fault code information of the target controller.

In some embodiments, the target APP may be an APP that is independently developed, or may be an applet that is loaded on another APP, which is not specifically limited in the embodiments of the present application.

S403, the mobile terminal sends a fault code request message to the VCU through the WiFi module.

S404, the mobile terminal receives the fault code information of the target controller sent by the VCU.

S405, the mobile terminal displays fault code information of the target controller.

As a possible implementation manner, the mobile terminal generates a fault code information table after receiving the fault code information of the target controller sent by the VCU, and displays the fault code information table through a display screen of the mobile terminal, so that a user can acquire the fault code information of the target controller.

Illustratively, the fault code information table is shown in table 1 below.

Table 1: fault code information table

Controller identification	Fault code list
		Target controller A	Fault code 1, fault code 2
Target controller B	Fault code 1, fault code 3, fault code 4
		Target controller C	Fault code 1, fault code 2, fault code 3, fault code 4

In one design, in combination with the vehicle fault diagnosis system shown in fig. 1, the vehicle fault diagnosis method provided by the application further includes an interactive flowchart shown in fig. 5, including S501-S508, which are specifically shown below.

S501, the VCU acquires target operation of a user within a first preset time period after the vehicle is electrified.

S502, starting the WiFi module by the VCU when the target operation is a preset operation and a preset starting condition is met.

And S503, the mobile terminal responds to the WiFi user name and the password input by the user, and near field communication connection between the mobile terminal and the vehicle is established through the WiFi module.

S504, the mobile terminal acquires a fault code request message input by a user at the target APP.

S505, the mobile terminal sends a fault code request message to the VCU through the WiFi module.

S506, the VCU acquires fault code information of target control.

S507, the VCU sends fault code information of the target controller to the mobile terminal.

S508, the mobile terminal displays the fault code information of the target controller.

The specific implementation manner of the vehicle fault diagnosis method described in the above steps S501 to S508 may refer to the description in the above embodiment of the present application, and will not be described herein.

The foregoing description of the solution provided by the embodiments of the present application has been mainly presented in terms of a method. To achieve the above functions, the VCU or the mobile terminal includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiments of the present application may divide functional modules of a VCU or a mobile terminal according to the above method, for example, the VCU or the mobile terminal may include each functional module corresponding to each functional division, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 6 is a schematic structural diagram of a vehicle fault diagnosis device according to an embodiment of the present application. The vehicle fault diagnosis device is used for executing the vehicle fault diagnosis method. As shown in fig. 6, the vehicle fault diagnosis apparatus 60 includes an acquisition unit 601, a processing unit 602, a receiving unit 603, and a transmitting unit 604.

The acquiring unit 601 is configured to acquire a target operation of a user within a first preset duration after the vehicle is powered on.

The processing unit 602 is configured to, when the target operation is a preset operation and the target operation meets a preset starting condition, start the WiFi module, and establish a near field communication connection with the mobile terminal.

The receiving unit 603 is configured to receive, through the WiFi module, a fault code request message sent by the mobile terminal, where the fault code request message is used to request to obtain fault code information of the target controller.

The acquiring unit 601 is further configured to acquire fault code information of the target controller.

The sending unit 604 is further configured to send fault code information of the target controller to the mobile terminal.

Optionally, the target operation is an operation of pressing a first key and a second key, and the first key and the second key are different cruise function keys.

The processing unit 602 is further configured to turn on the WiFi module when the pressing time of the first key is longer than the second preset time and the pressing time of the second key is longer than the third preset time.

Optionally, the processing unit 602 is further configured to detect a voltage value of the cruise function key in response to the vehicle powering up, and determine that the cruise function key fails when the voltage value does not belong to the preset interval and the duration exceeds the fourth preset duration, so as to store failure code information of the cruise function key.

Optionally, the target operation is clicking on a preset area of a display screen of a vehicle.

And the processing unit is further used for starting the WiFi module when the clicking times of clicking the preset area are larger than the preset times in the fifth preset time.

Optionally, the receiving unit 603 is further configured to receive, in a case where the target controller includes a plurality of controllers, fault code information sent by each of the plurality of controllers.

The sending unit 604 is further configured to forward, after receiving the fault code information of each of the plurality of controllers, the fault code information of each controller to the mobile terminal through the WiFi module.

Optionally, the processing unit 602 is further configured to control the vehicle to disconnect the high voltage connection in response to receiving the fault code request message, and stop responding to the high voltage connection request sent by the controller of the vehicle until the vehicle is powered up again.

The sending unit 604 is further configured to send a message to be displayed to an instrument of the vehicle, where the message to be displayed is used to indicate that the vehicle is in a maintenance state, and the high-voltage connection is disconnected.

Optionally, after the VCU and the mobile terminal establish a near field communication connection through the WiFi module, the receiving unit 603 is further configured to receive, through the WiFi module, an update package sent by the mobile terminal and an identifier of a controller to be updated. The processing unit 602 is further configured to update the to-be-updated controller based on the update package.

In a possible implementation manner, after the VCU establishes a near field communication connection with the mobile terminal through the WiFi module, the receiving unit 603 is further configured to receive, through the WiFi module, a controller data request message sent by the mobile terminal, where the controller data request message is used to request to obtain operation data of the controller. The sending unit 604 is further configured to send, to the mobile terminal, operation data of the controller through the WiFi module.

Fig. 7 is a schematic structural diagram of a vehicle fault diagnosis device according to an embodiment of the present application. The vehicle fault diagnosis device is used for executing the vehicle fault diagnosis method. As shown in fig. 7, the vehicle fault diagnosis apparatus 70 includes a processing unit 701, an acquisition unit 702, a transmission unit 703, a reception unit 704, and a display unit 705.

The processing unit 701 is configured to, in response to a WiFi user name and a password input by a user when the WiFi module is in an on state, establish a near field communication connection between the mobile terminal and the vehicle through the WiFi module.

The obtaining unit 702 is configured to obtain a fault code request message input by a user at an APP, where the fault code request message is used to request to obtain fault code information of a target controller, and the target APP logs in through an account number and a password authorized by a vehicle home manufacturer.

And the sending unit 703 is configured to send a fault code request message to the VCU through the WiFi module.

And the receiving unit 704 is configured to receive the fault code information of the target controller sent by the VCU.

And a display unit 705 for displaying the fault code information of the target controller.

Fig. 8 is a block diagram of a VCU, according to an example embodiment. As shown in fig. 8, VCU80 includes, but is not limited to: a processor 801 and a memory 802.

The memory 802 is used for storing executable instructions of the processor 801. It is to be understood that the above-described processor 801 is configured to execute instructions to implement the vehicle fault diagnosis method in the above-described embodiment.

It should be noted that the VCU structure shown in fig. 8 is not limiting and that the VCU may include more or fewer components than shown in fig. 8, or may be combined with certain components, or may have a different arrangement of components, as will be appreciated by those skilled in the art.

The processor 801 is a control center of the VCU, connects various parts of the entire VCU using various interfaces and lines, and performs various functions of the VCU and processes data by running or executing software programs and/or modules stored in the memory 802 and calling data stored in the memory 802, thereby performing overall monitoring of the VCU. The processor 801 may include one or more processing units. Alternatively, the processor 801 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 801.

Memory 802 may be used to store software programs as well as various data. The memory 802 may mainly include a storage program area that may store an operating system, application programs (such as a determination unit, a processing unit, etc.) required for at least one functional module, and a storage data area. In addition, memory 802 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

In an exemplary embodiment, a computer readable storage medium is also provided, such as a memory 802, including instructions executable by the processor 801 of the VCU80 to implement the vehicle fault diagnosis method of the above embodiments.

In actual implementation, the functions of the acquisition unit 601, the processing unit 602, the receiving unit 603, and the transmitting unit 604 in fig. 6 may be implemented by the processor 801 in fig. 8 calling a computer program stored in the memory 802. For a specific implementation procedure, reference may be made to the description of the vehicle fault diagnosis method in the above embodiment, and details are not repeated here.

Alternatively, the computer readable storage medium may be a non-transitory computer readable storage medium, for example, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

In an exemplary embodiment, the present application also provides a vehicle including the VCU described above.

In an exemplary embodiment, embodiments of the application also provide a computer program product comprising one or more instructions executable by the processor 801 of the VCU to perform the vehicle fault diagnosis method of the above-described embodiments.

It should be noted that, when the instructions in the computer readable storage medium or one or more instructions in the computer program product are executed by the processor of the VCU, the processes of the embodiments of the vehicle fault diagnosis method are implemented, and the technical effects similar to those of the vehicle fault diagnosis method can be achieved, so that repetition is avoided, and further description is omitted here.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules, so as to perform all the classification parts or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. The purpose of the embodiment scheme can be achieved by selecting part or all of the classification part units according to actual needs.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application, or the portion contributing to the prior art or the whole classification portion or portion of the technical solution, may be embodied in the form of a software product stored in a storage medium, where the software product includes several instructions to cause a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to execute the whole classification portion or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The present application is not limited to the above embodiments, and any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (16)

1. The vehicle fault diagnosis method is characterized by being applied to a whole vehicle domain controller VCU of a vehicle fault diagnosis system, wherein the vehicle fault diagnosis system also comprises a mobile terminal, and the vehicle comprises a wireless fidelity WiFi module; the method comprises the following steps:

acquiring target operation of a user in a first preset time period after the vehicle is electrified;

when the target operation is a preset operation and the target operation meets a preset starting condition, starting the WiFi module, and establishing near field communication connection with the mobile terminal;

receiving a fault code request message sent by the mobile terminal through the WiFi module, wherein the fault code request message is used for requesting to acquire fault code information of a target controller;

and acquiring the fault code information of the target controller, and sending the fault code information of the target controller to the mobile terminal.

2. The vehicle fault diagnosis method according to claim 1, wherein the target operation is an operation of pressing a first key and a second key, the first key and the second key being different cruise function keys, and opening the WiFi module if the target operation satisfies a preset opening condition, comprising:

and starting the WiFi module under the condition that the pressing time of the first key is longer than a second preset time and the pressing time of the second key is longer than a third preset time.

3. The vehicle fault diagnosis method according to claim 2, characterized in that the method further comprises:

detecting a voltage value of the cruise function key in response to the vehicle powering up;

and under the condition that the voltage value does not belong to a preset interval and the duration exceeds a fourth preset duration, determining that the cruise function key fails, and storing the failure code information of the cruise function key.

4. The vehicle fault diagnosis method according to claim 1, wherein the target operation is clicking a preset area of a vehicle body display screen of the vehicle, and opening the WiFi module if the target operation satisfies a preset opening condition includes:

And starting the WiFi module under the condition that the clicking times of clicking the preset area are larger than the preset times in the fifth preset time.

5. The vehicle fault diagnosis method according to any one of claims 1 to 4, characterized in that the acquiring the fault code information of the target controller and transmitting the fault code information of the target controller to the mobile terminal includes:

and when the target controller comprises a plurality of controllers, after the fault code information of each controller in the plurality of controllers is received, forwarding the fault code information of each controller to the mobile terminal through the WiFi module.

6. The vehicle failure diagnosis method according to any one of claims 1 to 4, characterized in that the method further comprises:

responding to the received fault code request message, controlling a vehicle to disconnect high-voltage connection, and stopping responding to a high-voltage connection request sent by a controller of the vehicle until the vehicle is powered on again;

and sending a message to be displayed to an instrument of the vehicle, wherein the message to be displayed is used for indicating that the vehicle is in a maintenance state, and the high-voltage connection is disconnected.

7. The vehicle fault diagnosis method according to any one of claims 1-4, characterized in that the vehicle fault diagnosis system further comprises a cabin controller CDC, the WiFi module being integrated in the VCU and/or the CDC.

8. The vehicle fault diagnosis method according to any one of claims 1 to 4, characterized in that after the VCU establishes a near field communication connection with the mobile terminal through the WiFi module, the method further comprises:

receiving an update package and an identification of a controller to be updated, which are sent by the mobile terminal, through the WiFi module;

and updating the controller to be updated based on the update package.

9. The vehicle fault diagnosis method according to any one of claims 1 to 4, characterized in that after the VCU establishes a near field communication connection with the mobile terminal through the WiFi module, the method further comprises:

receiving a controller data request message sent by the mobile terminal through the WiFi module, wherein the controller data request message is used for requesting to acquire the operation data of a controller;

and sending the operation data of the controller to the mobile terminal through the WiFi module.

10. The vehicle fault diagnosis method is characterized by being applied to a mobile terminal of a vehicle fault diagnosis system, wherein the vehicle fault diagnosis system also comprises a whole vehicle domain controller VCU, and the vehicle comprises a wireless fidelity WiFi module; the method comprises the following steps:

When the WiFi module is in an on state, responding to a WiFi user name and a password input by a user, and establishing near field communication connection between the mobile terminal and a vehicle through the WiFi module;

acquiring a fault code request message input by a user in a target application program APP, wherein the fault code request message is used for requesting to acquire fault code information of a target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer;

sending the fault code request message to the VCU through the WiFi module;

and receiving the fault code information of the target controller sent by the VCU, and displaying the fault code information of the target controller.

11. The vehicle fault diagnosis system is characterized by comprising a whole vehicle domain controller VCU and a mobile terminal, wherein the vehicle comprises a wireless fidelity WiFi module;

the VCU is used for acquiring target operation of a user in a first preset duration after the vehicle is electrified;

the VCU is further used for starting the WiFi module when the target operation is a preset operation and the target operation meets a preset starting condition;

the mobile terminal is used for responding to the WiFi user name and the password input by the user, and establishing near field communication connection between the mobile terminal and the vehicle through the WiFi module;

The mobile terminal is also used for acquiring a fault code request message input by a user in a target application program APP, wherein the fault code request message is used for requesting to acquire fault code information of a target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer;

the mobile terminal is further configured to send the fault code request message to the VCU through the WiFi module;

the VCU is also used for acquiring fault code information of the target controller and sending the fault code information of the target controller to the mobile terminal;

the mobile terminal is also used for displaying fault code information of the target controller.

12. The vehicle fault diagnosis device is characterized by being arranged on a whole vehicle domain controller VCU of a vehicle fault diagnosis system, wherein the vehicle fault diagnosis system further comprises a mobile terminal, the vehicle comprises a wireless fidelity WiFi module, and the vehicle fault diagnosis device comprises an acquisition unit, a processing unit, a receiving unit and a sending unit;

the acquisition unit is used for acquiring target operation of a user in a first preset duration after the vehicle is electrified;

the processing unit is used for starting the WiFi module and establishing near field communication connection with the mobile terminal under the condition that the target operation is a preset operation and the target operation meets a preset starting condition;

The receiving unit is used for receiving a fault code request message sent by the mobile terminal through the WiFi module, wherein the fault code request message is used for requesting to acquire fault code information of the target controller;

the acquisition unit is also used for acquiring fault code information of the target controller;

and the sending unit is used for sending the fault code information of the target controller to the mobile terminal.

13. The vehicle fault diagnosis device is characterized by being arranged on a mobile terminal of a vehicle fault diagnosis system, wherein the vehicle fault diagnosis system further comprises a whole vehicle domain controller VCU, the vehicle comprises a wireless fidelity WiFi module, and the vehicle fault diagnosis device comprises a processing unit, an acquisition unit, a sending unit, a receiving unit and a display unit;

the processing unit is used for responding to the WiFi user name and the password input by the user when the WiFi module is in an on state, and establishing near field communication connection between the mobile terminal and the vehicle through the WiFi module;

the acquisition unit is used for acquiring a fault code request message input by a user in a target application program APP, wherein the fault code request message is used for requesting to acquire fault code information of a target controller, and the target APP logs in through an account number and a password authorized by a vehicle attribution manufacturer;

The sending unit is configured to send the fault code request message to the VCU through the WiFi module;

the receiving unit is used for receiving the fault code information of the target controller sent by the VCU;

and the display unit is used for displaying the fault code information of the target controller.

14. The whole-vehicle-domain controller VCU is characterized by being deployed on a vehicle and comprising a memory and a processor;

the memory is coupled to the processor;

the memory is used for storing computer program codes, and the computer program codes comprise computer instructions;

when the processor executes the computer instructions, the VCU performs the vehicle fault diagnosis method according to any one of claims 1-9.

15. A computer readable storage medium having instructions stored therein, which when run on a whole-vehicle-domain controller VCU, cause the VCU to perform the vehicle fault diagnosis method according to any one of claims 1-9.

16. A vehicle comprising a whole domain controller VCU according to claim 14.