EP2920768B1 - Verfahren zur unterstützung einer fernfahrzeugdiagnose - Google Patents

Verfahren zur unterstützung einer fernfahrzeugdiagnose Download PDF

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Publication number
EP2920768B1
EP2920768B1 EP13803102.6A EP13803102A EP2920768B1 EP 2920768 B1 EP2920768 B1 EP 2920768B1 EP 13803102 A EP13803102 A EP 13803102A EP 2920768 B1 EP2920768 B1 EP 2920768B1
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European Patent Office
Prior art keywords
computer
request
session
diagnostic
vehicle
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EP13803102.6A
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English (en)
French (fr)
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EP2920768A1 (de
Inventor
Thierry Lopez
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PSA Automobiles SA
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PSA Automobiles SA
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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
    • G07C5/0808—Diagnosing performance data
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2205/00—Indexing scheme relating to group G07C5/00
    • G07C2205/02—Indexing scheme relating to group G07C5/00 using a vehicle scan tool
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station

Definitions

  • the invention relates to remote diagnostic assistance systems for motor vehicles, and more particularly to the protection of such systems against accidental or malicious use which may lead to a loss of functional integrity on a vehicle.
  • a maintenance operator has functions and indicators assigned to separate faults (we generally speak of fault codes or DTCs for Diagnostic Trouble Codes).
  • DTCs Diagnostic Trouble Codes
  • the operator uses functions of a very different nature such as reading information taken from the vehicle, activating test routines, resetting learning or downloading. software to correct an anomaly.
  • the main defect caused by this type of functionality is precisely linked to the fact that, when activating these different functions, the operator distance does not have the visual status of the vehicle and that it can, without any malicious intent, activate a function that it would never have activated if the vehicle had been in the workshop. For example, it is very unlikely that an operator will activate an injector control function (to check if the injectors are faulty and if the vehicle has a fuel leak). As the operator is not near the vehicle, he is not in a position to observe this fuel leak. Other, more complex cases may arise, for example, triggering a regeneration of the particulate filter while the vehicle is parked in tall grass, thus risking triggering a fire.
  • the aim of the invention is therefore to remedy the aforementioned drawback and to provide a more secure diagnostic aid system.
  • the invention makes it possible to improve the security of a remote diagnosis by integrating, on the one hand, steps for opening and closing a session dedicated to remote diagnosis from the on-board vehicle and, on the other hand , by implementing a verification step to check that a request is authorized to be executed during a remote diagnosis session. Access to certain functions of a vehicle is thus limited for an operator located at a distance from a vehicle.
  • the method according to the invention further comprises a filtering step, executed by the first computer on each reception of a request and consisting in rejecting the request if the request is a request for opening a session.
  • the second computer comprises a table comprising a list of requests and indicating for each request whether it is authorized during a remote diagnostic session, the table being used during the verification step.
  • the method according to the invention further comprises, in response to the transmission of a request for opening a remote diagnostic session, the transmission of a message, from the second computer to the first computer , indicating that the session is open.
  • the method according to the invention further comprises, in response to the transmission of a request to close a remote diagnostic session, the transmission of a message, from the second computer to the first computer, indicating that the session is closed.
  • the first computer and the second computer are connected by a data bus, the diagnostic requests and messages exchanged circulating on the data bus.
  • the diagnostic requests each include an address to identify the destination computer and an address to identify the computer to which to send the response to the request.
  • the invention also relates to a system for assisting the remote diagnosis of a vehicle according to claim 6.
  • the second computer comprises a table comprising a list of requests and indicating for each request whether it is authorized during a remote diagnostic session.
  • the vehicle further comprises a third computer, the second computer being connected to the first computer via the third computer, the second computer being connected to the third computer via a data bus, the messages or requests exchanged between the first computer and the destination computer passing through the third computer.
  • the system 110 makes it possible to facilitate the maintenance of a vehicle 100.
  • the vehicle 100 comprises a first computer 102.
  • the first computer 102 is able to exchange data remotely with a diagnostic tool 101 for example by the 'intermediary of a wireless telephone network (GSM or 3G).
  • GSM wireless telephone network
  • 3G wireless telephone network
  • the vehicle comprises for example a second computer 103 dedicated for example to the management of the engine of the vehicle 100.
  • the vehicle 100 comprises for example a third computer 105 dedicated for example to the management of the passenger compartment of the vehicle 100.
  • the third computer 105 manages a certain number of electrical equipment items of the vehicle 100 and in particular, airbags, interior lighting, locking / unlocking of the doors and the boot, operation of the electric windows and sunroof, the timing of the windshield wipers.
  • Each of the computers 102, 103, 105 comprises at least one processor and one memory.
  • the vehicle 100 comprises at least one data bus 104 on which pass data exchanged by the various on-board computers 102, 103, 105 in the vehicle 100.
  • the diagnostic tool 101 and the computers 102, 103, 105 communicate by means of a diagnostic protocol.
  • This protocol is based on the following mechanism: each request from the tool 101 corresponds to a response from the recipient (one of the computers 102, 103, 105).
  • This response can be positive, it is then the response expected by the diagnostic tool 101, or negative, either because the request is erroneous, or because the destination computer 102, 103, 105 is in a state which does not allow the expected response to be transmitted, for example because of an overload of the processor or because unsuitable operating conditions (e.g. the handbrake may not be applied because the vehicle is moving, which may prevent certain functions from being performed).
  • Each of the computers 103, 105, on board the vehicle 100 and capable of responding to remote diagnostic requests includes a specific session, called in the remainder of the description a remote diagnostic session.
  • a session defines a mode of access to a computer in which the execution of certain functions or requests is authorized or not.
  • Each of the computers 103, 105 also includes a session dedicated to connected diagnostics, in other words to diagnostics using a tool directly connected to the vehicle. Such a tool is used by an operator physically located near the vehicle.
  • the creation of a specific remote diagnostic session thus makes it possible to separate the functions that can be activated by a professional connecting a tool in a garage to the centralized connector of a vehicle, from a professional operating remotely.
  • each of the computers 103, 105 on board the vehicle 100 capable of responding to remote diagnostic requests, include a table comprising a list of requests and indicating for each request whether it is authorized during 'a remote diagnostic session, the table being used during a verification step.
  • the table comprises for example a series of rows corresponding to requests, a column associated with the remote diagnosis and another column associated with the connected diagnosis.
  • a value indicates whether the request is authorized in the corresponding session as in the example if after: List of requests Connected diagnostic session Telediagnosis session Reading internal faults Authorized Authorized Erase Flash Eprom Unauthorized Unauthorized Injector control authorized Unauthorized ... ... ...
  • a certain number of functions on a vehicle are accessible to a professional by means of a connected tool when it is in the development phase or when it is in the repair phase as part of a road trip in which he will have control of when the operation is triggered.
  • these same functionalities are prohibited during the use phase by a customer who does not master the moment when these functionalities are triggered.
  • the first computer 102 comprises a request filtering module.
  • the filtering module filters all requests to open or close a session from outside the vehicle.
  • the first computer 102 alone has the capacity to issue requests for opening and closing a remote diagnostic session for each of the on-board computers.
  • This feature makes it possible to prevent a takeover or exploitation of this functionality by a malicious person. Indeed, with this filtering, it is not possible to remotely open a connected diagnostic session. It is therefore not possible to “make the vehicle believe” that a computer is in communication with a tool connected to the centralized socket of the vehicle while the access is carried out remotely via the first computer 102.
  • the first computer 102 For any other request REQ1 received by the first computer 102 intended for another computer 103, 105, the first computer 102 first transmits to the other computer 103, 105 a request for opening a remote diagnosis session. Upon receipt of this request, the recipient computer 103, 105 switches to the desired session after activating an internal indicator (or flag) indicating that a remote diagnostic session is open. The recipient computer 103, 105 sends a message specifying that it has now entered the requested session. On receipt of this message, the first computer 102 transmits the request REQ1.
  • the latter On receipt of the frame or message REQ1 and depending on the authorization table for the remote diagnosis session and the functional conditions of the vehicle (for example vehicle stationary, handbrake applied) available to the destination computer 103, 105, the latter is responsible for executing or not the functionality carried by the request and then transmits the response to the first computer 102.
  • the vehicle for example vehicle stationary, handbrake applied
  • the first computer 102 On receipt of the response, the first computer 102 then sends the response from the recipient computer to the tool 101 from which it has received the request REQ1 and also transmits to the recipient computer a remote diagnostic session closure request by means. On receipt of this request, the recipient computer sets its internal remote diagnostic indicator to the invalid value indicating the closing of the remote diagnostic session, closes the remote diagnostic session and sends a closing confirmation message to the first computer 102 to confirm it. abandonment of the current session.
  • the data bus is for example a CAN type bus (for Controller Area Network), that is to say a multiplexed system on which a plurality of computers communicate in turn by exchanging communication frames.
  • CAN type bus for Controller Area Network
  • Each frame is identified by a code, and contains a set of functional information.
  • Each request comprises a destination address ADR_REQ indicating an identifier of the computer receiving the request on the data bus 10se4 and a response address ADR_REP indicating an identifier of the computer sending the request on the data bus 104.
  • FIG 2 represents a flowchart illustrating the flow of the steps of the method according to the invention in this example.
  • the first step will of course consist for this operator in selecting, in a diagnostic tool 101, the request that we will call REQ1 corresponding to this request.
  • the method comprises a step 201 of sending the diagnostic request REQ1 from the diagnostic tool 101 to the first computer 102 via a wireless connection.
  • the request is thus transmitted without physical contact between the vehicle 100 and the diagnostic tool 101.
  • the request also contains a request address ADR_REQ and a response address ADR_REP of the computer 103 which must functionally process this request: in this case , the engine control computer 103 in our example.
  • the first computer 102 On receipt of this request, the first computer 102 keeps in memory the addresses ADR_REQ, ADR_REP of the engine control computer 103 as well as the request REQ1.
  • the method then comprises the transmission 202 of a request for opening a remote diagnostic session (denoted Opening_TD), from the first computer 102 to the second computer 103.
  • the request for opening a remote diagnostic session 202 contains the address ADR_REQ kept in memory.
  • the request is sent on the data bus 104.
  • the second computer 103 recognizes its destination ADR_REQ address and receives the request 301.
  • the second computer 103 verifies 302 whether the request is a request for the opening of a remote diagnostic session.
  • the second computer 103 switches 303 into the remote diagnostic session, sets the internal indicator 304 to a valid state and sends 203 to the first computer 102 a message indicating that it is indeed in the requested remote diagnostic session (noted TD_Open), the message includes the ADR_REP response address of the second computer 103.
  • the first computer 102 On receipt by the first computer 102 of the confirmation message, the first computer 102 compares the address of the message with the address ADR_REP that it has stored in memory so as to verify that the response is indeed that which corresponds to the request previously transmitted. The first computer 102 does not send this message to the diagnostic tool 101.
  • the first computer 102 transmits the REQ1 request (in the example the request for reading the coolant temperature information) to the second computer 103 (the engine control computer) for which it has kept the address ADR_REQ in memory.
  • the second computer 103 recognizes its destination ADR_REQ address, receives the request 301 and 103 verifies 302 whether the request is a remote diagnostic session opening request.
  • the second engine computer 103 verifies 306 that its remote diagnostic indicator is correctly positioned in a valid state and that the REQ1 request is indeed one of the requests authorized in the remote diagnostic session 306 (using the table). If this is the case, as in our example, the second computer 103 executes the request 307 and sends 205 a response message (denoted R1) containing the water temperature information to the first computer 102.
  • the second computer 103 sends a negative response message 308, indicating that it cannot respond to the request.
  • the first computer 102 sends 206 this response R1 to the diagnostic tool 101 and sends 207 to the second computer 103 a request to close the remote diagnostic session (noted Fermeture_TD).
  • the second computer 103 sets its internal remote diagnostic indicator back to invalid and sends 208 to the first computer 102 a response confirming the closure of the remote diagnostic session (noted TD_Closed). This last message is not transmitted to diagnostic tool 101 either.
  • the first computer 102 when the power is re-energized, starts again from the start of the method. at the session opening request step 202.
  • the recipient computer 103, 105 reposition the internal remote diagnostic indicator to invalid when the power is re-energized.
  • the first computer 102 is not directly connected to the data bus 104 of the vehicle.
  • the first computer 102 is connected to an intermediate computer, itself connected to the data bus 104 and acting as a gateway or message dispatcher.
  • Each of the messages or requests exchanged between the first computer 102 and the destination computer 103 then passes through the intermediate computer.
  • the intermediate computer may for example be the third computer 105.
  • the figure 4 illustrates this variant embodiment of the system according to the invention in which the vehicle 410 comprises an intermediate computer 105.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Selective Calling Equipment (AREA)

Claims (7)

  1. Verfahren zur Unterstützung der Ferndiagnose eines Fahrzeugs (100), wobei das Fahrzeug (100) einen ersten Computer (102) und mindestens einen zweiten Computer (103) umfasst, der mit dem ersten Computer (102) verbunden ist, wobei das Verfahren umfasst:
    - Übertragung einer Diagnoseanforderung (201) von einem Diagnosewerkzeug (101) an den ersten Computer (102) über eine drahtlose Verbindung,
    - Senden einer Anforderung zur Eröffnung einer Ferndiagnosesitzung (202) vom ersten Computer (102) an den zweiten Computer (103),
    - Übertragung der Diagnoseanforderung (204) vom ersten Computer (102) zum zweiten Computer (103),
    - Prüfen (306), um zu steuern, ob die Anforderung für eine Ferndiagnosesitzung autorisiert ist, und wenn die Anforderung autorisiert ist, Senden einer Nachricht (205) von dem zweiten Computer (103) an den ersten Computer (102), wobei die Nachricht Antwortdaten auf die Anforderung enthält,
    - Übertragung der Antwortnachricht (206) vom ersten Computer (102) an das Diagnosewerkzeug (101),
    - Senden einer Anforderung zum Schließen der Ferndiagnosesitzung (207) von dem ersten Computer (102) an den zweiten Computer (103), dadurch gekennzeichnet, dass der zweite Computer (103) eine Sitzung hat, die der Diagnose unter Verwendung eines direkt mit dem Fahrzeug verbundenen Werkzeugs gewidmet ist,
    wobei der zweite Computer (103) eine Tabelle umfasst, die eine Liste von Anforderungen enthält und für jede Anforderung angibt, ob sie während einer Ferndiagnosesitzung autorisiert ist und ob sie während einer der Diagnose gewidmeten Sitzung unter Verwendung eines direkt mit dem Fahrzeug verbundenen Werkzeugs autorisiert ist, die Tabelle, die im Verifikationsschritt verwendet wird (306),
    wobei das Verfahren ferner einen Filterschritt umfasst, der von dem ersten Computer (102) bei jedem Empfang einer Anforderung durchgeführt wird und darin besteht, die Anforderung zurückzuweisen, wenn die Anforderung eine Anforderung zur Eröffnung einer Sitzung ist.
  2. Verfahren zur Unterstützung der Diagnose nach Anspruch 1, das ferner als Antwort auf die Übertragung einer Anforderung zur Eröffnung einer Ferndiagnosesitzung (202) die Übertragung einer Nachricht (203) von dem zweiten Computer (103) zu dem ersten Computer (102) umfasst, die anzeigt, dass die Sitzung offen ist.
  3. Verfahren zum Unterstützen der Diagnose in Übereinstimmung mit irgendeinem der vorstehenden Ansprüche, ferner umfassend, als Antwort auf die Übertragung einer Anforderung zum Schließen einer Ferndiagnosesitzung (207), Übertragen einer Nachricht (208) von dem zweiten Computer (103) zu dem ersten Computer (102), die anzeigt, dass die Sitzung geschlossen ist.
  4. Verfahren zur Unterstützung der Diagnose in Übereinstimmung mit einem der vorstehenden Ansprüche, wobei der erste Computer (102) und der zweite Computer (103) durch einen Datenbus (104) verbunden sind, wobei die Diagnoseanforderungen und die ausgetauschten Nachrichten auf dem Datenbus zirkulieren.
  5. Verfahren zur Diagnoseunterstützung nach Anspruch 4, wobei die Diagnoseanforderungen jeweils eine Adresse zur Identifizierung des Zielcomputers (ADR_REQ) und eine Adresse zur Identifizierung des Computers, an den die Antwort auf die Anforderung gesendet werden soll (ADR_REP), umfassen.
  6. System zur Unterstützung bei der Ferndiagnose eines Fahrzeugs (100), wobei das System das Fahrzeug umfasst und so konfiguriert ist, dass es das Verfahren gemäß einem der vorstehenden Ansprüche durchführt, und wobei das Fahrzeug (100) einen ersten Computer (102) und mindestens einen zweiten Computer (103) aufweist, der mit dem ersten Computer (102) verbunden ist, wobei der erste Computer (102) so konfiguriert ist, dass er eine Diagnoseanforderung von einem Diagnosewerkzeug über eine drahtlose Verbindung empfängt,
    - wobei der zweite Computer (103) eine Ferndiagnosesitzung umfasst, wobei die Diagnosesitzung einen Satz von Anforderungen definiert, die zur Ausführung autorisiert sind, wobei das System dadurch gekennzeichnet ist, dass der zweite Computer (103) eine Sitzung umfasst, die der Diagnose unter Verwendung eines direkt mit dem Fahrzeug verbundenen Werkzeugs gewidmet ist,
    der zweite Computer (103) eine Tabelle umfasst, die eine Liste von Anforderungen enthält und für jede Anforderung angibt, ob sie während einer Ferndiagnosesitzung autorisiert ist und ob sie während einer Sitzung autorisiert ist, die der Diagnose unter Verwendung eines direkt mit dem Fahrzeug verbundenen Werkzeugs gewidmet ist, und der erste Computer (102) einen Filtermodus enthält, der so konfiguriert ist, dass er eine Anforderung
  7. Diagnosehilfesystem nach Anspruch 6, bei dem das Fahrzeug (410) außerdem einen dritten Rechner (105) aufweist, wobei der zweite Rechner (103) über den dritten Rechner (105) mit dem ersten Rechner (102) verbunden ist, wobei der zweite Rechner (103) über einen Datenbus (104) mit dem dritten Rechner (105) verbunden ist, wobei zwischen dem ersten Rechner (102) und dem Zielrechner (103) ausgetauschte Nachrichten oder Anfragen den dritten Rechner (105) durchlaufen.
EP13803102.6A 2012-11-16 2013-11-04 Verfahren zur unterstützung einer fernfahrzeugdiagnose Active EP2920768B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1260919A FR2998237B1 (fr) 2012-11-16 2012-11-16 Procede d'aide au diagnostic a distance d'un vehicule
PCT/FR2013/052623 WO2014076386A1 (fr) 2012-11-16 2013-11-04 Procédé d'aide au diagnostic à distance d'un véhicule

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EP2920768A1 EP2920768A1 (de) 2015-09-23
EP2920768B1 true EP2920768B1 (de) 2021-02-24

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CN (1) CN104956407B (de)
FR (1) FR2998237B1 (de)
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FR3034910B1 (fr) * 2015-04-10 2018-04-27 Psa Automobiles Sa. Procede de realisation d’actions a distance dans des equipements electroniques communicants de vehicules, et dispositif de communication associe
US10346152B2 (en) 2016-09-20 2019-07-09 At&T Intellectual Property I, L.P. Facilitating use of a universal integrated circuit card (UICC) for secure device updates
CN108243212B (zh) * 2016-12-24 2021-07-20 宝沃汽车（中国）有限公司 用于车辆诊断的方法和装置
GB2559171B (en) * 2017-01-30 2020-06-03 Jaguar Land Rover Ltd Apparatus and method for controlling movement of a vehicle
US10731537B2 (en) * 2017-09-27 2020-08-04 Denso International America, Inc. Regeneration compliance systems for location based management of particulate filter regeneration
FR3076645A1 (fr) 2018-01-08 2019-07-12 Psa Automobiles Sa Procede de controle de la conformite de calculateur(s) d’un vehicule par comparaison d’identifiants, et systeme de controle associe
CN108845561B (zh) * 2018-06-01 2021-06-01 深圳市先河系统技术有限公司 远程故障诊断方法、远程故障诊断设备和系统

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Publication number Publication date
CN104956407A (zh) 2015-09-30
CN104956407B (zh) 2018-06-26
EP2920768A1 (de) 2015-09-23
WO2014076386A1 (fr) 2014-05-22
FR2998237A1 (fr) 2014-05-23
FR2998237B1 (fr) 2016-12-02

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