CN104977170B - Vehicle failure remote diagnosis system and its control method - Google Patents
Vehicle failure remote diagnosis system and its control method Download PDFInfo
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- CN104977170B CN104977170B CN201510340454.8A CN201510340454A CN104977170B CN 104977170 B CN104977170 B CN 104977170B CN 201510340454 A CN201510340454 A CN 201510340454A CN 104977170 B CN104977170 B CN 104977170B
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- 238000004171 remote diagnosis Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003745 diagnosis Methods 0.000 claims abstract description 68
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims abstract description 6
- 238000002405 diagnostic procedure Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000007726 management method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Abstract
The present invention relates to automotive electronics wireless communication technique field, more particularly to a kind of vehicle failure remote diagnosis system, including car-mounted terminal, in-car bus, in-car controller and remote diagnosis backstage, described car-mounted terminal is used to judge whether to meet conditions for diagnostics, after conditions for diagnostics is met, car-mounted terminal initiates diagnosis request and the successively DTC of collecting cart internal controller by in-car bus according to diagnosing protocol to in-car controller, all fault code indications being collected into of car-mounted terminal packing are simultaneously sent to remote diagnosis backstage by wireless communication module, remote diagnosis backstage will be shown after the information that receives is parsed and judged on diagnosis report is back to car-mounted terminal or user uses mobile terminal.And also disclose the control method of the system.By remote Diagnosis Technology, hidden danger have occurred and that and potential is found in time, ensures the promptness and accuracy of fault diagnosis；Meanwhile greatly reduce manpower and materials cost.
Description
Technical field
The present invention relates to automotive electronics wireless communication technique field, more particularly to a kind of vehicle failure remote diagnosis system and
Its control method.
Background technology
With developing rapidly for auto industry, present electron controls technology has penetrated into each part of automobile, vapour
The performance and comfortableness of car are greatly improved.But the structure of automobile also becomes to become increasingly complex simultaneously, automaticity
Also more and more higher so that the electronic control system of vehicle becomes to become increasingly complex.Therefore, the diagnosis and elimination of breakdown of automobile turns into
One important technical requirements and safety guarantee.
Traditional car fault diagnosis is that to specify the failure diagnostic apparatus of exploitation to be connected to vehicle using depot special at present
In OBD-II diagnostics ports, fault diagnosis and investigation are carried out by professional and technical personnel is manually operated.The vehicle diagnostics tool of this mode
There is higher professional technique to require (typically operated and controlled in after-sale service department), and the diagnostic equipment construction cycle is long, takes
With height, simultaneously because this side is off-line operation, the promptness of car fault diagnosis can not be protected.
The content of the invention
The primary and foremost purpose of the present invention is to provide a kind of vehicle failure remote diagnosis system, ensure car fault diagnosis and
When property and accuracy.
To realize object above, the technical solution adopted by the present invention is：A kind of vehicle failure remote diagnosis system, including car
Mounted terminal, in-car bus, in-car controller and remote diagnosis backstage, described car-mounted terminal are used to judge whether to meet diagnosis
Condition, after conditions for diagnostics is met, car-mounted terminal initiates diagnosis by in-car bus according to diagnosing protocol to in-car controller please
Ask and the DTC of collecting cart internal controller, all fault code indications being collected into of car-mounted terminal packing simultaneously pass through channel radio successively
News module is sent to remote diagnosis backstage, remote diagnosis backstage the information that receives is parsed and judged after by diagnosis report
Be back to car-mounted terminal or mobile terminal that user uses on show.
Compared with prior art, there is following technique effect in the present invention：Pass through remote Diagnosis Technology so that vehicle diagnosis from
The fault progression that analysis finds to have occurred is found in time for that can carry out continual monitoring to every technical data of vehicle
Hidden danger occur and potential, and driver or after-sale service personnel are timely informed, ensure the promptness and standard of fault diagnosis
True property；Simultaneously as no longer being diagnosed by specified failure diagnostic apparatus, manpower and materials cost is greatly reduced.
It is another object of the present invention to provide a kind of control method of vehicle failure remote diagnosis system, ensures vehicle
The promptness and accuracy of fault diagnosis.
To realize object above, the technical solution adopted by the present invention is：A kind of control of vehicle failure remote diagnosis system
Method, comprise the following steps：(A) car-mounted terminal judges whether to meet conditions for diagnostics, if meeting conditions for diagnostics, performs step B, no
Then repeat step A；(B) car-mounted terminal initiates diagnosis request by in-car bus according to diagnosing protocol to in-car controller, and receives
Collect the DTC of in-car controller, all fault code indications being collected into of packing, sent by wireless communication module to remotely examining
Have no progeny platform；(C) remote diagnosis backstage parses fault code indications and feeds back to user.
Compared with prior art, there is following technique effect in the present invention：Pass through remote Diagnosis Technology so that vehicle diagnosis from
The fault progression that analysis finds to have occurred is found in time for that can carry out continual monitoring to every technical data of vehicle
Hidden danger occur and potential, and driver or after-sale service personnel are timely informed, ensure the promptness and standard of fault diagnosis
True property；Simultaneously as no longer being diagnosed by specified failure diagnostic apparatus, manpower and materials cost is greatly reduced.
Brief description of the drawings
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is the automatic diagnostic flow chart of the present invention；
Fig. 3 is the Troubleshooting Flowchart of the present invention；
Fig. 4 is the active diagnosing flow chart of the invention based on mobile terminal；
Fig. 5 is the active diagnosing flow chart of the invention based on car-mounted terminal.
Embodiment
With reference to Fig. 1 to Fig. 5, the present invention is described in further detail.
Refering to Fig. 1, a kind of vehicle failure remote diagnosis system, including car-mounted terminal 10, in-car bus 20, in-car controller
30 and remote diagnosis backstage 40, described car-mounted terminal 10 is used to judge whether to meet conditions for diagnostics, when meeting conditions for diagnostics
Afterwards, car-mounted terminal 10 initiates diagnosis request and successively collecting cart by in-car bus 20 according to diagnosing protocol to in-car controller 30
The DTC of internal controller 30, the abbreviation of DTC are DTC, are represented using referred to as in figure, and car-mounted terminal 10 is packed institute
There are the fault code indications being collected into and sent by wireless communication module 11 to remote diagnosis backstage 40,40 pairs of remote diagnosis backstage
The information received parsed and judged after by diagnosis report is back to car-mounted terminal 10 or user uses mobile terminal 50
Upper display.By setting remote diagnosis backstage 40, car-mounted terminal 10 passes the DTC collected by wireless communication module 11
Transport on remote diagnosis backstage 40, can so carry out long-range fault diagnosis to vehicle whenever and wherever possible, ensure the timeliness of diagnosis
Property.Simultaneously as the parsing of DTC, processing are all carried out on remote diagnosis backstage 40, thus without by professional skill
Art personnel are manually operated to carry out fault diagnosis and investigation, greatly reduces human and material resources cost.In-car controller 30 has a lot,
Conventional controller including but not limited to shown in the figure of the present embodiment, EPS is electric boosting steering system in figure, TCU
That is automatic gear-box control unit, EMS are engine management unit, and IMMO is anti-theft locking system of engine, and ABS is anti-lock
Brakes.
Preferably, described car-mounted terminal 10 includes micro-control unit 12, bus control unit 13, bus transceiver 14；Institute
The micro-control unit 12 stated is responsible for the control logic of car-mounted terminal 10 and strategy is handled；Bus control unit 13 is used to need to transmit
Data be converted into protocol data-flow according to corresponding frame format and coded system, or the data flow of reception is parsed；Always
Line transceiver 14 is bus control unit 13 and the interface of in-car bus 20.By setting micro-control unit 12, control can be patrolled
Collect and strategy is handled, improve the applicability of system.Bus control unit 13 and bus transceiver 14 facilitate the transmission of data.
As the preferred scheme of the present invention, described car-mounted terminal 10 includes fire wall 15, memory 16, power management mould
Block 17, stand-by power supply 18；Fire wall 15 is responsible for the detection, limitation and filtering of diagnosis control signal, prevents the illegal network information from entering
Enter to vehicle system；Memory 16 is used for the storage of vehicle and the information of car-mounted terminal 10；Power management module 17 is responsible for vehicle-mounted end
Power supply processing logic inside end 10, stand-by power supply 18 are used to provide power supply under emergency conditions for car-mounted terminal 10.Due to car
Data exchange is carried out by wireless communication module 11 and remote diagnosis backstage 40, in order to avoid invalid information enters on network
Invade, here provided with fire wall 15, ensure the safety of data transfer.Meanwhile power management module 17 and stand-by power supply 18 are set
Put, it is ensured that the reliably working of the present apparatus.
Preferably, after described car-mounted terminal 10 receives and parses through diagnosis report, examined by the display of car-mounted display module 60
Disconnected report；Described mobile terminal 50 is mobile phone or flat board or notebook computer, and in Fig. 1, described mobile terminal 50 is mobile phone.
With the development of computer technology and mobile communication technology, automobile failure diagnosis and self-diagnosis technology are promoted not
It is disconnected perfect.The system utilizes existing vehicle-mounted universal diagnostic agreement, is moved by the access of wireless communication module 11 built in car-mounted terminal 10
Fault message, can not only be sent to the remote diagnosis specified from the background 40 by dynamic internet on demand again in real time, after remote diagnosis
Platform 40 analyzes and processes to fault message, the administrative staff that most fault diagnosis result is sent to user or specified at last.Using
This new remote Diagnosis Technology so that the fault progression that vehicle diagnosis finds to have occurred from analysis is can be to the items of vehicle
Technical data carries out continual monitoring, finds fault diagnosis system have occurred and that and potential risk in time.
The invention also discloses a kind of control method of vehicle failure remote diagnosis system, comprise the following steps：(A) it is vehicle-mounted
Terminal 10 judges whether to meet conditions for diagnostics, if meeting conditions for diagnostics, performs step B, otherwise repeat step A；(B) car-mounted terminal
10 initiate diagnosis request, and the event of collecting cart internal controller 30 by in-car bus 20 according to diagnosing protocol to in-car controller 30
Hinder code, all fault code indications being collected into of packing, sent by wireless communication module 11 to remote diagnosis backstage 40；(C) it is remote
Journey diagnosis backstage 40 parses fault code indications and feeds back to user.Pass through the control method, it is possible to achieve vehicle failure it is long-range
Diagnosis.Here fault code indications are necessary, and some vehicles are not only only capable of being collected into fault code indications, moreover it is possible to are collected into failure
Message, this when simultaneously can be sent fault code indications, failure message to remote diagnosis backstage 40 in the lump.Below according to examining
The difference of broken strip part, it is for reference to give four kinds of specific diagnostic process：
Refering to Fig. 2, including automatic diagnostic process, car-mounted terminal 10 judges whether full as follows in automatic diagnostic process
Sufficient conditions for diagnostics：(A11) monitors ignition signal of car-mounted terminal 10, next step is performed after receiving ignition signal, otherwise repeats to walk
Rapid A11；(A12) whether the judging distance last time of car-mounted terminal 10 diagnosis exceedes setting time t, if not exceeded, return to step A11,
If exceeding, next step is performed；(A13) whether car-mounted terminal 10 judges user using diagnostic equipment, if using, return to step A11,
If being not used, next step is performed；(A14) car-mounted terminal 10 judges whether transmitter starts, if not actuated, return to step A11, if
Start, perform step B.Here the time t set, it is to prevent that diagnosis is excessively frequent.It is anti-as follows in automatic diagnostic process
Feedforward information is to user：(C11) remote diagnosis backstage 40 judges that diagnostic result whether there is failure, if in the absence of failure or depositing
In failure but fault alarm condition is unsatisfactory for, then stores current information；(C12) if failure be present and meet fault alarm condition,
Then message is sent to mobile terminal 50 or car-mounted terminal 10.
Automatic diagnostic process, if meeting the condition specified, begins to once be diagnosed when each vehicle ignition.
Vehicle can thus be diagnosed in the very first time, ensure the security that subsequent vehicle uses.In addition, in order to prevent user
Forget to carry out it is described below and active diagnosing flow, the setting of automatic diagnostic process, it is ensured that the time all can every one end
Once diagnosed.
Refering to Fig. 3, including fault diagnosis flow scheme, car-mounted terminal 20 judges whether full as follows in fault diagnosis flow scheme
Sufficient conditions for diagnostics：(A21) car-mounted terminal 10 by in-car bus monitoring network signal and determines whether alarm signal, if not having
Have, then repeat step A21 continues to monitor, if there is alarm signal, performs next step；(A22) car-mounted terminal 10 judges that this is alarmed
Whether whether signal and last time alarm signal are identical or be a part in last time alarm signal, if identical or reported for last time
A part in alert signal, performs next step, otherwise performs step B；(A23) whether the diagnosis of the judging distance last time of car-mounted terminal 10
More than setting time t, if not exceeded, return to step A21, if exceeding, performs step B.In fault diagnosis flow scheme as follows
Feed back to user：(C21) whether the DTC that the judgement of remote diagnosis backstage 40 is collected into is complete, if imperfect, performs step
Rapid C22, if completely, performing step C23；(C22) controller for the DTC that judgement is not collected into is continued on remote diagnosis backstage 40
Whether comprising the controller for producing alarm signal, if comprising to mobile terminal 50 or the transmission message of car-mounted terminal 10, if not wrapping
Contain, then store current information；(C23) remote diagnosis backstage 40 judges that diagnostic result whether there is failure, if in the absence of failure
Or failure be present but be unsatisfactory for fault alarm condition, then store current information；(C24) if failure be present and meet fault alarm
Condition, then send message to mobile terminal 50 or car-mounted terminal 10.
Fault diagnosis flow scheme is mainly when monitoring that new alarm signal produces, and begins to diagnose vehicle,
To be parsed to specific failure, timely inform user or fix a breakdown.
Refering to Fig. 4, including the active diagnosing flow based on mobile terminal, the active diagnosing flow based on mobile terminal is by such as
Lower step judges whether to meet conditions for diagnostics：(A31) user clicks on the vehicle diagnostics button on mobile terminal 50, mobile terminal 50
Judge whether user has logged on, if being not logged in, need to input user name and password, until after input correctly logins successfully,
Next step is performed, if having logged on, directly performs next step；(A32) after logining successfully, show that diagnosis is said on mobile terminal 50
Bright prompting interface, and have " current ", the selection of " history " both of which；If user selects " current ", enter in next step, if user
Select " history ", mobile terminal 50 obtains the last diagnostic result and display from remote diagnosis backstage 40；(A33) vehicle-mounted end
10 monitors ignition signals are held, perform next step after receiving ignition signal, otherwise repeat step A33；(A34) car-mounted terminal 10 is sentenced
Whether turn-off exceedes setting time t from last time diagnosis, if not exceeded, return to step A33, if exceeding, performs next step；(A35)
Car-mounted terminal 10 judges that user whether using diagnostic equipment, if using, return to step A33, if being not used, performs next step；
(A36) car-mounted terminal 10 judges whether transmitter starts, if not actuated, return to step A33, if starting, performs step B.It is based on
The active diagnosing flow of mobile terminal feeds back to user as follows：(C31) 40 failure judgement codes of remote diagnosis backstage
Whether parsing succeeds, if unsuccessful, returns to miscue, if success, diagnosis report is shown on mobile terminal 50.Need
It is noted that it is size-limited in accompanying drawing 4, in figure【Start to diagnose】That is included by the startup conditions for diagnostics braces in Fig. 2
The step of.
With the development of smart mobile phone, almost everyone has the smart mobile phone of 1 or more with carrying now.Here
Active diagnosing flow based on mobile terminal, user can be allowed to start whenever and wherever possible by mobile terminal 50 vehicle is examined
It is disconnected；Simultaneously, moreover it is possible to former diagnostic message is checked by mobile terminal 50.In the specific steps of the present embodiment, only carry
And the last diagnostic result is obtained, but in practical application, in the past all diagnostic results can be stored, this
Sample can be checked easily.
Refering to Fig. 5, including the active diagnosing flow based on car-mounted terminal, the active diagnosing flow based on car-mounted terminal is by such as
Lower step judges whether to meet conditions for diagnostics：(A41) user triggers remote diagnosis request in car-mounted terminal 10；(A42) vehicle-mounted end
10 monitors ignition signals are held, perform next step after receiving ignition signal, otherwise repeat step A42；(A43) car-mounted terminal 10 is sentenced
Whether turn-off exceedes setting time t from last time diagnosis, if not exceeded, return to step A42, if exceeding, performs next step；(A44)
Car-mounted terminal 10 judges that user whether using diagnostic equipment, if using, return to step A42, if being not used, performs next step；
(A45) car-mounted terminal 10 judges whether transmitter starts, if not actuated, return to step A42, if starting, performs step B.It is based on
The active diagnosing flow of car-mounted terminal feeds back to user as follows：(C31) 40 failure judgement codes of remote diagnosis backstage
Whether parsing succeeds, if unsuccessful, returns to miscue, if success, after car-mounted terminal 10 receives and parses through diagnosis report, leads to
Cross car-mounted display module 60 and show diagnosis report.
The last active diagnosing flow based on car-mounted terminal is mainly used for user when being driven on vehicle, opens at any time
Diagnosis to vehicle, without relying on other-end or condition, it can open at any time, can be convenient when really reaching any
Diagnosed.
Pass through aforementioned four diagnostic process, it is ensured that user can start diagnosis whenever and wherever possible, and can ensure with
In the case that family is forgotten, fault diagnosis is independently carried out, has fully ensured that the security that in-car controller 30 uses.
Claims (9)
- A kind of 1. vehicle failure remote diagnosis system, it is characterised in that：Including car-mounted terminal (10), in-car bus (20), in-car Controller (30) and remote diagnosis backstage (40), described car-mounted terminal (10) are used to judge whether to meet conditions for diagnostics, sentenced It is disconnected whether to meet that conditions for diagnostics includes following four diagnostic process：Automatic diagnostic process is when each vehicle ignition, if full The fixed condition of toe, begins to diagnose vehicle；Fault diagnosis flow scheme be when monitoring that new alarm signal produces, Begin to diagnose vehicle；Active diagnosing flow based on mobile terminal, it is that user passes through mobile terminal whenever and wherever possible (50) diagnosis to vehicle is started；Active diagnosing flow based on car-mounted terminal, it is to be used for user when being driven on vehicle, at any time Open the diagnosis to vehicle；After conditions for diagnostics is met, car-mounted terminal (10) according to diagnosing protocol by in-car bus (20) to In-car controller (30) initiates diagnosis request and the successively DTC of collecting cart internal controller (30), car-mounted terminal (10) packing institute There are the fault code indications being collected into and sent by wireless communication module (11) to remote diagnosis backstage (40), remote diagnosis backstage (40) by diagnosis report is back to car-mounted terminal (10) or user uses shifting after the information received being parsed and judged Shown in dynamic terminal (50).
- 2. vehicle failure remote diagnosis system as claimed in claim 1, it is characterised in that：Described car-mounted terminal (10) includes Micro-control unit (12), bus control unit (13), bus transceiver (14)；Described micro-control unit (12) is responsible for car-mounted terminal (10) control logic and strategy is handled；Bus control unit (13) be used to needing the data transmitted according to corresponding frame format and Coded system is converted into protocol data-flow, or the data flow of reception is parsed；Bus transceiver (14) is bus control unit (13) and in-car bus (20) interface.
- 3. vehicle failure remote diagnosis system as claimed in claim 1, it is characterised in that：Described car-mounted terminal (10) includes Fire wall (15), memory (16), power management module (17), stand-by power supply (18)；Fire wall (15) is responsible for diagnosis control letter Number detection, limitation and filtering, prevent the illegal network information from entering vehicle system；Memory (16) is used for vehicle and vehicle-mounted end Hold the storage of (10) information；Power management module (17) is responsible for the internal power supply processing logic of car-mounted terminal (10), stand-by power supply (18) it is used to provide power supply under emergency conditions for car-mounted terminal (10).
- 4. vehicle failure remote diagnosis system as claimed in claim 1, it is characterised in that：Described car-mounted terminal (10) receives And after parsing diagnosis report, diagnosis report is shown by car-mounted display module (60)；Described mobile terminal (50) be mobile phone or Flat board or notebook computer.
- 5. the control method of vehicle failure remote diagnosis system as claimed in claim 1, comprises the following steps：(A) car-mounted terminal (10) judges whether to meet conditions for diagnostics, if meeting conditions for diagnostics, performs step B, otherwise repeat step A；(B) car-mounted terminal (10) initiates diagnosis request by in-car bus (20) according to diagnosing protocol to in-car controller (30), And the DTC of collecting cart internal controller (30), all fault code indications being collected into of packing, pass through wireless communication module (11) Send to remote diagnosis backstage (40)；(C) remote diagnosis backstage (40) parses fault code indications and feeds back to user.
- 6. the control method of vehicle failure remote diagnosis system as claimed in claim 5, it is characterised in that：Including automatic diagnosis Flow, car-mounted terminal (10) judges whether to meet conditions for diagnostics as follows in automatic diagnostic process：(A11) car-mounted terminal (10) monitors ignition signal, next step is performed after receiving ignition signal, otherwise repeat step A11；(A12) whether car-mounted terminal (10) judging distance last time diagnosis exceedes setting time t, if not exceeded, return to step A11, If exceeding, next step is performed；(A13) car-mounted terminal (10) judges that user whether using diagnostic equipment, if using, return to step A11, if being not used, holds Row is in next step；(A14) car-mounted terminal (10) judges whether engine starts, if not actuated, return to step A11, if starting, performs step B；User is fed back to as follows in automatic diagnostic process：(C11) remote diagnosis backstage (40) judges that diagnostic result whether there is failure, if in the absence of failure or failure being present But fault alarm condition is unsatisfactory for, then stores current information；(C12) if failure be present and meet fault alarm condition, message is sent to mobile terminal (50) or car-mounted terminal (10).
- 7. the control method of vehicle failure remote diagnosis system as claimed in claim 5, it is characterised in that：Including fault diagnosis Flow, car-mounted terminal (10) judges whether to meet conditions for diagnostics as follows in fault diagnosis flow scheme：(A21) car-mounted terminal (10) by in-car bus monitoring network signal and determines whether alarm signal, if not having, weighs Multiple step A21 continues to monitor, if there is alarm signal, performs next step；(A22) car-mounted terminal (10) judges whether this alarm signal and last time alarm signal are identical or whether are last time alarm A part in signal, if identical or be the part in last time alarm signal, performs next step, otherwise execution step B；(A23) whether car-mounted terminal (10) judging distance last time diagnosis exceedes setting time t, if not exceeded, return to step A21, If exceeding, step B is performed；User is fed back in fault diagnosis flow scheme as follows：(C21) whether the DTC that remote diagnosis backstage (40) judgement is collected into is complete, if imperfect, step C22 is performed, if complete It is whole, perform step C23；(C22) whether the controller for the DTC that remote diagnosis backstage (40) continues to judge not to be collected into is comprising generation alarm signal Controller, if comprising sending message to mobile terminal (50) or car-mounted terminal (10), if not including, store current letter Breath；(C23) remote diagnosis backstage (40) judges that diagnostic result whether there is failure, if in the absence of failure or failure being present But fault alarm condition is unsatisfactory for, then stores current information；(C24) if failure be present and meet fault alarm condition, message is sent to mobile terminal (50) or car-mounted terminal (10).
- 8. the control method of vehicle failure remote diagnosis system as claimed in claim 5, it is characterised in that：Including based on movement The active diagnosing flow of terminal, the active diagnosing flow based on mobile terminal judge whether to meet conditions for diagnostics as follows：(A31) user clicks on the vehicle diagnostics button on mobile terminal (50), and mobile terminal (50) judges whether user has stepped on Record, if being not logged in, needs to input user name and password, until after input correctly logins successfully, next step is performed, if having stepped on Record, then directly perform next step；(A32) after logining successfully, diagnosis explanation prompting interface is shown on mobile terminal (50), and have two kinds of " current ", " history " Model selection；If user selects " current ", enter in next step, if user's selection " history ", mobile terminal (50) is from remotely examining Platform (40) of having no progeny obtains the last diagnostic result and display；(A33) car-mounted terminal (10) monitors ignition signal, next step is performed after receiving ignition signal, otherwise repeat step A33；(A34) whether car-mounted terminal (10) judging distance last time diagnosis exceedes setting time t, if not exceeded, return to step A33, If exceeding, next step is performed；(A35) car-mounted terminal (10) judges that user whether using diagnostic equipment, if using, return to step A33, if being not used, holds Row is in next step；(A36) car-mounted terminal (10) judges whether engine starts, if not actuated, return to step A33, if starting, performs step B；Active diagnosing flow based on mobile terminal feeds back to user as follows：(C31) whether (40) the failure judgement code parsing of remote diagnosis backstage succeeds, if unsuccessful, returns to miscue, if into Work(, then show diagnosis report on mobile terminal (50).
- 9. the control method of vehicle failure remote diagnosis system as claimed in claim 5, it is characterised in that：Including based on vehicle-mounted The active diagnosing flow of terminal, the active diagnosing flow based on car-mounted terminal judge whether to meet conditions for diagnostics as follows：(A41) user triggers remote diagnosis request in car-mounted terminal (10)；(A42) car-mounted terminal (10) monitors ignition signal, next step is performed after receiving ignition signal, otherwise repeat step A42；(A43) whether car-mounted terminal (10) judging distance last time diagnosis exceedes setting time t, if not exceeded, return to step A42, If exceeding, next step is performed；(A44) car-mounted terminal (10) judges that user whether using diagnostic equipment, if using, return to step A42, if being not used, holds Row is in next step；(A45) car-mounted terminal (10) judges whether engine starts, if not actuated, return to step A42, if starting, performs step B；Active diagnosing flow based on car-mounted terminal feeds back to user as follows：(C31) whether (40) the failure judgement code parsing of remote diagnosis backstage succeeds, if unsuccessful, returns to miscue, if into Work(, after car-mounted terminal (10) receives and parses through diagnosis report, diagnosis report is shown by car-mounted display module (60).
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