WO1998040715A1 - Procede et dispositif de diagnostic de vehicule - Google Patents
Procede et dispositif de diagnostic de vehicule Download PDFInfo
- Publication number
- WO1998040715A1 WO1998040715A1 PCT/JP1998/000975 JP9800975W WO9840715A1 WO 1998040715 A1 WO1998040715 A1 WO 1998040715A1 JP 9800975 W JP9800975 W JP 9800975W WO 9840715 A1 WO9840715 A1 WO 9840715A1
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- WO
- WIPO (PCT)
- Prior art keywords
- diagnosis
- vehicle
- self
- operation signal
- forced operation
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0002—Automatic control, details of type of controller or control system architecture
- B60W2050/0004—In digital systems, e.g. discrete-time systems involving sampling
- B60W2050/0005—Processor details or data handling, e.g. memory registers or chip architecture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0002—Automatic control, details of type of controller or control system architecture
- B60W2050/0004—In digital systems, e.g. discrete-time systems involving sampling
- B60W2050/0006—Digital architecture hierarchy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
- B60W2050/021—Means for detecting failure or malfunction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/146—Display means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/18—Braking system
Definitions
- the present invention relates to a vehicle diagnosis method and apparatus, and in particular, even if a forced operation signal for forcibly operating these is supplied from an external diagnosis apparatus that communicates with an on-vehicle electronic control device and performs vehicle diagnosis to each part of the vehicle.
- the present invention relates to a vehicle diagnosis method and apparatus for preventing an in-vehicle self-diagnosis function from making a wrong diagnosis. Background art
- ECU electronic fuel injection device
- the ECU includes various sensors such as a temperature sensor that detects the temperature of the engine cooling water, a rotation sensor that detects the engine speed, a vehicle speed sensor that detects the vehicle speed, and a ⁇ 2 sensor that detects the oxygen concentration in the exhaust gas.
- Various switches such as a brake switch for detecting that the brake pedal is depressed are connected, and the ECU performs various controls based on detection signals output from various sensors and the like.
- a vehicle diagnostic program is executed by a diagnostic device equipped with a microcomputer, and a diagnosis on a desired diagnostic item is performed at a scheduled time. Diagnostic methods have been proposed. In the fault diagnosis for a plurality of diagnostic items, for example, as described in Japanese Patent Publication No. 61-25091, the plurality of diagnostic items are diagnosed in a predetermined order. The result of the pass / fail judgment regarding the item was sequentially output on the display device.
- Ne diagnosis which determines whether the engine speed Ne during idling is within a prescribed range
- brake which diagnoses the opening and closing function of the brake switch “Switch diagnosis”
- diagnosis of the function of controlling the opening and closing timing of the valve according to various conditions such as vehicle running speed and engine speed, and collection of fuel gas evaporating from the fuel tank
- EVP diagnosis The diagnosis of the evaporation system to be supplied to the engine when the above operating conditions are satisfied (hereinafter referred to as EVP diagnosis) can be realized under the limited conditions of the inspection process, such as the driving conditions that actually function. Diagnosis is difficult due to difficulty.
- a forced actuation signal is supplied from the ECU to each related part to forcibly actuate the above-mentioned valves and the evaporation system, etc., and the valves and the evaporation system obtained at this time are obtained.
- a method of diagnosing pass / fail based on whether or not the actual state of is in the state predicted from the forcible operation signal can be considered.
- This self-diagnosis function determines that a failure has occurred when an abnormal signal outside the reference range is detected from the input terminals connected to various sensors, and provides a code (failure code) to identify the location where the abnormal signal was output and an error. Store the signal value (failure data) in memory.
- these failure codes and failure data are read from the ECU by a dedicated device and used to determine the failure status and details of the failure.
- An object of the present invention is to provide an on-board self-diagnosis even if a forcible activation signal for forcibly operating each part of a vehicle is supplied from an external diagnostic device, and as a result, each part of the vehicle may show a state different from a normal state. It is an object of the present invention to provide a vehicle diagnosis method and apparatus in which a function is not erroneously diagnosed as an occurrence of an abnormality based on the state.
- the present invention is characterized in that the following means are taken.
- a forced operation signal is externally supplied to each part of a vehicle having a self-diagnosis function, and based on whether or not the actual state of the vehicle detected at that time is in a state predicted from the forced operation signal.
- a vehicle diagnosis method that performs an external diagnosis by self-diagnosis, when the external diagnosis is started, the self-diagnosis of at least the self-diagnosis items that can change the self-diagnosis result under the influence of the forced operation signal is stopped. did.
- a forced operation signal is externally supplied to each part of the vehicle having a self-diagnosis function, and based on whether or not the actual state of the vehicle detected at that time is in a state predicted from the forced operation signal.
- a vehicle diagnostic device that performs an external diagnosis separately from the self-diagnosis, a forced operation signal supply unit that supplies a forced operation signal to a diagnosis target portion related to a diagnosis item, and detects a current state of the diagnosis target portion.
- State detecting means for detecting the current state of the detected part to be diagnosed
- Diagnosing means for diagnosing the diagnosis target portion by comparing with a state predicted when a forced operation signal is supplied thereto; and a self-diagnosis stop instruction for stopping self-diagnosis during the supply of the forced operation signal. Instruction means is provided.
- a self-diagnosis stopping means is provided to stop the self-diagnosis of an item whose diagnostic result may change under the influence of the operation signal.
- the vehicle provided with the self-diagnosis device is supplied with a forced operation signal for forcibly operating each portion of the vehicle for external diagnosis from the external diagnosis device. If the self-diagnosis device is predicted to make a movement different from the normal operation, the self-diagnosis for the part predicted to make the movement different from the normal operation is stopped, so that the self-diagnosis device does not misdiagnose by the forced operation signal.
- FIG. 1 is a block diagram showing a configuration of an ECU 1 and an external diagnostic device 2 mounted on a vehicle to be diagnosed.
- FIG. 2 is a diagram schematically showing the storage contents of the ROM card 7
- FIG. 3 is a diagram showing the storage contents of the diagnosis item management table 71
- FIG. 4 is a non-standard data storage area 7
- Fig. 5 is a diagram showing the storage contents of the standard data storage area 73.
- Figs. 6A to 6F show various display examples on the display unit 27. It is a figure
- FIG. 7 is a functional block diagram of the first embodiment of the present invention.
- FIG. 8 is a flowchart showing an outline of vehicle diagnosis according to the present invention. is there.
- FIG. 9 is a flowchart showing the operation of the initial processing.
- FIG. 10 is a flowchart showing the operation of the vehicle speed sensor diagnosis.
- C FIG. 11 is a flowchart showing the operation of the EGR diagnosis.
- FIG. 12 is a flowchart showing the operation of the EVP diagnosis.
- FIG. 13 is a block diagram of the evaporation system.
- FIG. 14 is a flowchart showing the operation of the VT diagnosis.
- Fig. 15 is a flowchart showing the operation of Ne diagnosis.
- FIG 16 is a flowchart showing the operation of the Ne diagnosis (continued)
- FIG. 17 is a flowchart showing the operation of each switch diagnosis.
- FIG. 18 is a flowchart showing the operation of the end processing.
- FIG. 19 is a flowchart showing the operation of the standby mode processing.
- FIG. 20 is a functional block diagram of the second embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION
- the ECU 1 includes a self-diagnosis function unit 9, a CPU 10, a R / M 11, a RAM 12, a driver 13, an A / D converter 14, and a communication interface 15.
- the ECU 1 is connected to peripheral devices via connectors 16 and 17.
- the connector 16 is connected to various actuators 3, and the connector 17 is connected to various sensors and switches 4.
- the connector 18 has the communication cable 5 of the external diagnostic device 2
- a signal input to the ECU 1 from each sensor 4 is converted into a digital signal by the A / D converter 14 and taken into the CPU 10. Incorporated into CPU 10
- the received signal is processed according to control data stored in the ROM 11 and the RAM 12 and a control program written in the ROM 11.
- An instruction signal corresponding to the processing result of the CPU 10 is input to the dryno 13, and the dryno 13 supplies power to the actuator 3 in response to the instruction signal.
- an identification code unique to each ECU 1, that is, an ECU code is also registered in the R / M11.
- the self-diagnosis function unit 9 is, for example, a memory in which a self-diagnosis program is built.
- the external diagnostic device 2 of the present invention includes a CPU 20, a ROM 21, a RAM 22, a transmitting unit 24, a communication interface 25, and a power supply unit 29.
- the power supply unit 29 selects one of the vehicle-mounted battery 19 and the built-in battery 23 of the vehicle to be diagnosed as the power source of the external diagnostic device 2.
- the external diagnostic device 2 includes a keyboard 26 for inputting instructions from an operator, a display unit 27 for displaying the processing results of the CPU 20, and a bar code for reading the identification code displayed on the bar code.
- a header 31 and a barcode interface 32 are provided.
- a liquid crystal display panel (LCD) with a backlight is employed as the display unit 27.
- LCD liquid crystal display panel
- the keyboard 26 is provided with general numeric keys, cursor movement keys, function keys, and the like.
- the communication cable 5 has a signal line 51 and a power supply line 52, and the communication interface 15 of the ECU 1 and the communication interface 25 of the external diagnostic device 2 are connected via the signal line 51 of the communication cable 5. It is configured such that bidirectional digital communication can be performed between the CPU 10 and the CPU 20.
- the power supply unit 29 uses the power supplied from the vehicle battery 19 via the power supply line 52 as a power source for the external diagnostic device 2, and uses the power to supply the built-in battery. Recharge 23.
- the operator activates the external diagnostic device 2 by turning on a power switch (not shown) provided on the keyboard 26 or operating the key switch at all. This is done by the operator simply connecting the connector 34 of the communication cable 5 to the connector 18 of the ECU 1, and the operation after the start differs depending on which method is used.
- the ROM 21 stores basic programs and control data necessary for controlling the external diagnostic device 2, and is added with the production of new models, such as non-standard data used in each diagnosis and vehicle diagnostic programs. Specific information that can be changed or changed is stored in the ROM card 7. The data of the ROM is read into the CPU 20 via the ROM card interface 28.
- the signal received from the ECU 1 is processed based on the basic data stored in the ROM 21 and the RAM 22 and the vehicle diagnostic program and control data stored in the ROM card ⁇ , and the processing result, that is, the diagnosis result is obtained. Are temporarily stored in the RAM 22.
- This diagnostic result is output to the display unit 27 each time the diagnosis of each vehicle is completed, and the diagnostic results of several vehicles are transmitted from the transmitting unit 24 to the host device such as the host computer 30 in response to the instruction of the operator.
- the information is centrally managed and stored by the host computer 30 and the large storage device 33.
- the external diagnostic device 2 can be connected to a personal computer (not shown), and necessary information, for example, an updated (upgraded) fault diagnostic program can be fetched via the personal computer.
- the ROM card 7 has a diagnostic item management table 71 for selecting diagnostic items based on ECU commands, and a vehicle storing a vehicle diagnostic program for a plurality of diagnostic items. Diagnostic program description Storage area 72, a standard data storage area 73 for storing standard data shared by each vehicle irrespective of the ECU, and a non-standard data storage area 74 for storing non-standard data unique to each ECU. And is secured.
- FIG. 3 is a diagram showing an example of the storage contents of the diagnosis item management table 71.
- the external diagnostic device 2 of the present invention is capable of diagnosing a large number of items and has all the algorithms for each diagnostic item, but not all diagnostics are performed for all vehicles. The diagnostic items to be performed for a patient are different.
- FIG. 4 is a diagram showing an example of the storage contents of the non-standard data storage area 74.
- non-standard data that differs for each ECU (that is, ECU code), for example, the unique idling rotation speed NID -ref is registered in association with each ECU code.
- the unique idling speed NID-ref is the idling reference speed specified for each ECU code, as will be described in detail later, and determines whether the engine speed during idling is normal. The diagnosis is performed by comparing the detected engine speed Ne with the specific idling speed NID-ref selected according to the ECU code of the vehicle.
- different diagnostic contents that is, a combination of diagnostic items and non-standard data are automatically determined according to the ECU code. You are free from the decision. Therefore, not only the burden on the operator is reduced, but also there is no mistake in selection of diagnostic items ⁇ misrecognition of non-standard data, etc. Will be possible.
- FIG. 5 is a diagram showing the storage contents of the standard data storage area 73, in which standard data xl to ⁇ 5 that are shared in each diagnosis regardless of the ECU code in the diagnosis program are stored.
- FIG. 8 is a flowchart showing an outline of vehicle diagnosis by the external diagnostic device of the present invention.
- the external diagnostic device 2 of the present invention can be used in vehicle diagnosis under any environment, such as vehicle diagnosis on a production line and vehicle diagnosis in a repair shop. The operation will be described by taking as an example the case of use in "vehicle diagnosis” performed in the "inspection process".
- a cyclic diagnosis method for example, if the diagnosis cycle is set so that one cycle of the diagnosis is completed while the operator is depressing the brake pedal, any order and timing can be used. Even if the brake pedal is depressed, the “Brake Switch Diagnosis” is always executed during that time, so the restrictions on the order and timing of various operations to be performed for each diagnostic item are reduced, and work efficiency is reduced. Improve dramatically.
- step S100 "initial processing” is executed.
- step S200 "vehicle speed sensor diagnosis” registered as diagnosis item 1 is executed.
- step S300 "EGR diagnosis” registered as diagnosis item 2 is executed.
- step S400 "EVP diagnosis” registered as diagnosis item 3 is executed.
- step S500 “Variable VT (valve timing) diagnosis” registered as diagnosis item 4 is executed. Is performed.
- step S600 "Ne diagnosis” registered as diagnosis item 5 is executed.
- step S700 a diagnosis of each switch system registered as diagnosis items 6, 7,... Is executed.
- step S800 "end processing” is executed.
- step S900 "standby mode processing” is executed. Thereafter, the process returns to step S200, and the above-described diagnoses are repeated until all the diagnostics pass, unless stopped by an external instruction from an operator or the like.
- the external diagnostic device of the present invention is configured to automatically, continuously, and cyclically repeatedly execute diagnosis on a large number of items.
- each diagnostic method and processing method will be described in detail.
- FIG. 9 is a flowchart showing the operation of the “initial processing” of step S100.
- the activation of the external diagnostic device 2 of the present embodiment is performed when the operator operates the power switch provided on the keyboard 26 or when the operator connects the communication cable 5 to the ECU. This can be done by either connection to 1 and the initial processing determines which method was used to turn on the power first.
- step S101 it is determined whether or not the power of the external diagnostic device 2 has been turned on by turning on the switch. If the result is affirmative, in step S104, the flag F st indicating the power-on procedure is set to "F st". Set to "0". At this time, power is supplied to the external diagnostic device 2 by the built-in battery 23. If the determination in step S101 is negative, in step S102, it is determined whether the communication cable 5 is connected to the vehicle (ECU 1) . If the determination is positive, In step S103, the flag Fst is set to "1". The power supply at this time is performed by the vehicle battery 19.
- step S105 When power-on is detected by any of the methods, an initial screen is displayed on the display unit 27 in step S105, and the diagnostic device is displayed in step S106. 2Self-diagnosis is performed to check for its own abnormalities and failures. If it is determined in step S107 that the self-diagnosis result is good, the process proceeds to step S108. If it is determined that the self-diagnosis is bad, an error message is displayed on the display unit 27 in step S119, and the process is performed. finish.
- step S108 the flag Fst is checked to determine whether the operator is to select a process to be executed on the menu screen or to automatically activate a predetermined process. Is done. If the flag Fst2 "1", that is, the power is turned on by a cable connection, "vehicle diagnosis" is immediately started as a predetermined specific process without displaying the menu screen on the display unit 27, and The process proceeds to step S109.
- step S109 the ECU code registered in the ECU 1 is read.
- step S110 the diagnosis item management table 71 described with reference to FIG. 3 is searched based on the read ECU code, and a diagnosis item to be executed is selected.
- step S111 the diagnosis selection flag Fselcx X ("" is a diagnosis item number) of the selected diagnosis item is set to "1" (selection), and the diagnosis selection flag of the diagnosis item not selected is set. Fselcx X is set to "0" (unselected).
- step S112 the diagnostic item numbers representing the selected diagnostic items are listed on the display unit 27.
- FIG. 6 (a) is a diagram showing a display example of the display section 27 when all the diagnostic items are selected, and all the diagnostic item numbers "01", "02", "03” ... are displayed. Have been.
- "00” is a code that is erased when a sufficient number of times or a total time for completing the "Ne diagnosis" of the diagnostic item 5 are performed, as will be described in detail later. This is displayed in step S113.
- the code is not limited to "00". If the code can be easily distinguished from other diagnostic item numbers, for example, "X" Alphabet. Other symbols may be used.
- step S114 the bar code reader 31 reads an identification code representing identification information unique to each vehicle using a bar code, and temporarily stores the identification code in the RAM 22.
- This identification code is printed in advance on a diagnostic chart prepared in advance for each vehicle. Instead of printing on the diagnostic chart, a tag or sticker on which a bar code is printed may be attached to an appropriate place on the vehicle body. Then, the process proceeds to the next diagnosis in FIG. 8, that is, “vehicle speed sensor diagnosis”.
- a menu screen for selection is displayed on the display unit 27.
- the diagnosis process is started as in the case above.
- the operator selects a process other than “vehicle diagnosis” in step S116, the selected process is executed in step S117.
- step S118 it is determined whether or not "end” has been selected in step S116, and if "end” has been selected, the process ends.
- the processing after power-on differs depending on whether the power of the external diagnostic apparatus 2 is turned on by the switch-on operation or the cable connection procedure. Then, the diagnostic process starts immediately without displaying the menu screen. Therefore, the operator of the inspection line can automatically start the vehicle diagnosis simply by connecting the cable 5 of the external diagnostic device 2 to each of the vehicles to be diagnosed conveyed one after another. Operation at the time of diagnosis is simplified. Also, When the operator activates the external diagnostic device 2 by turning on the switch, a menu screen is displayed, so that other processes can be easily selected.
- FIG. 10 is a flowchart showing a diagnostic method of “vehicle speed sensor diagnostic” of diagnostic item 1 executed as step S200 in FIG.
- the “vehicle speed sensor diagnosis” is a diagnosis of whether or not a sensor for detecting the vehicle speed is functioning normally, and is based on a comparison result of the vehicle speed VS detected by the vehicle speed sensor with a reference value (reference vehicle speed VSref). The diagnosis is made by a known and appropriate technique.
- step S203 the reference vehicle speed VSref stored in the standard data storage area 73 (FIG. 5) of the ROM card 7 is read out as one of the standard data. Then, in step S204, the current vehicle speed VS is detected via the ECU 1.
- step S205 a vehicle speed sensor diagnosis is executed based on the reference vehicle speed VSref and the vehicle speed VS.
- step S206 it is determined whether the diagnosis performed in step S205 is successful or not. If the diagnosis is not successful, the next diagnosis item (in the present embodiment, according to the flowchart of FIG. 8). Since the procedure proceeds to the diagnosis item 2 “EGR diagnosis”), the “vehicle speed sensor diagnosis” waits until the next diagnosis timing.
- FIG. 6B is a diagram showing a display example of the display unit 27 when only the “vehicle speed sensor diagnosis” has passed, and only the diagnosis item number “01” is deleted.
- FIG. 11 is a flowchart showing a diagnosis method of “EGR diagnosis” of diagnosis item 2 executed as step S300 of FIG.
- EGR diagnosis is a diagnosis of whether or not the device (EGR) for reducing N ⁇ x by recirculating exhaust gas to the combustion chamber of the engine is functioning properly.
- the specific method is known. is there.
- FIG. 12 is a flowchart showing a diagnosis method of “EVP diagnosis” executed as step S400 in FIG. This is the diagnosis performed.
- FIG. 7 is a functional block diagram of the present invention for realizing the above-described vehicle diagnosis, and the same reference numerals as those described above denote the same or equivalent parts. Note that the step numbers assigned to the respective blocks correspond to the step numbers assigned to the respective flow charts, and indicate the contents of the processing executed by the respective blocks.
- the diagnosis item selection means 55 1 is based on the diagnosis item management table 71 registered in the ROM card 7 and the vehicle diagnosis program 72, and the diagnosis to be executed from among a plurality of diagnosis items. Select items continuously and cyclically one by one.
- the compulsory operation signal supply means 550 is one of the diagnostic items that require a compulsory operation signal at the time of diagnosis among the diagnostic items that can be selected by the diagnostic item selection means 551 (in the present embodiment, “EVP A forced activation signal S x for operating the diagnosis target portion 101 related to “diagnosis” or “variable VT diagnosis”) is supplied via the ECU 1.
- the vehicle state detecting means 552 detects the current state of the diagnosis target portion 101 associated with the diagnostic item selected by the diagnostic item selecting means 551, via the in-vehicle ECU1.
- the diagnosing means 55 3 is configured to calculate a current state of the diagnosis target portion 101 detected by the vehicle state detecting means 55 2, a state expected when the forced operation signal S x is given thereto. It is determined that the diagnosis target part 101 is good if the two are in agreement or a predetermined relationship. The judgment result is displayed on the display unit 27.
- the ⁇ EVP diagnosis '' means that the fuel gas evaporating from the fuel in the fuel tank 81 and collected by the canister 86 meets the scheduled conditions when the vehicle is running, as schematically shown in Fig. 13. Then, it is a diagnosis regarding the evaporation system which supplies the engine via the suction pipe 87.
- each valve 83, 84, 85 is controlled to be opened and closed by the ECU 1, it is necessary to determine whether each valve is operating normally in the EVP diagnosis. No. However, it is difficult to run the vehicle so that each valve of the evaporation system operates properly under the limited conditions of the inspection process. Therefore, in the present embodiment, the above-mentioned forced operation signal is sent from the ECU 1 to each valve, and each valve is forcibly opened / closed independently of the actual running state of the vehicle. At that time, the pressure detected by the pressure sensor (PS) 82 is compared with the pressure expected when each valve is opened and closed as instructed by the forcible operation signal. If so, diagnose each valve as good.
- PS pressure sensor
- step S401 based on the selection flag Fselc3 and the pass flag Fpass3 for diagnosis item 3, It is determined whether or not the diagnosis item is selected and whether the diagnosis is successful or not. If the selected diagnosis item is selected but has not passed, the process proceeds to step S402. Otherwise, the process proceeds to the next diagnosis. In step S402, the diagnosis stop flag F stop 3 is referred to. If the flag has been set, the process proceeds to the next diagnosis, and if not, the process proceeds to step S403.
- the diagnosis stop flag Fstop3 is set when the “EVP diagnosis” does not pass even though it has been performed more than the scheduled number of times. After the diagnosis stop flag Fstop3 is set, "EVP diagnosis” is excluded from the diagnosis target.
- step S403 it is determined whether another forced operation signal for diagnosis has already been transmitted from ECU 1 to diagnosis target portion 101.
- the forced activation signal to be determined here is a forced activation signal supplied to the solenoid valve in the “variable VT diagnosis” described later in the present embodiment. If the determination in step S403 is negative, in step S404, it is determined whether or not the forced activation signal Sx for “EVP diagnosis” has already been transmitted. If this determination is negative, in step S405, the self-diagnosis stop instruction means 554 gives an instruction to the self-diagnosis function unit 9 of the ECU 1 to temporarily stop the self-diagnosis.
- the instruction may be an instruction to stop all self-diagnosis by the self-diagnosis function unit 9 or a result of the diagnosis based on the forced operation signal Sx supplied for the “EVP diagnosis”. May be an instruction to stop only the diagnosis on items that can change.
- step S406 a command to output from the ECU 1 an appropriate forced operation signal Sx for forcibly opening and closing the valves 83 to 85 constituting the evaporation system is shown in FIG. Is output to the ECU 1 from the forced operation signal supply means 550. In response, the ECU 1 outputs a forced operation signal Sx to each of the valves 83 to 85.
- step S407 the detection value of the pressure sensor PS (FIG. 13) is read by the vehicle state detection means 552 in FIG.
- step S408 the quality of each valve is determined by the diagnosis means 553 based on whether or not the detected value matches the pressure value predicted from the state of each valve opened and closed by the forcible operation signal Sx. Is diagnosed. If it is not determined to be good, a diagnostic counter (not shown) is incremented in step S413. In step S414, it is determined whether or not the number of diagnoses has exceeded the upper limit number. If the determination is negative, the process proceeds to the flowchart of FIG.
- the process proceeds to the next diagnosis item (in the present embodiment, the diagnosis item 4 “variable VT diagnosis”), so that the “EVP diagnosis” waits until the next diagnosis timing.
- the diagnosis result in step S408 becomes good, "1" is set in the diagnosis pass flag Fpass3 in step S409, and the diagnosis displayed on the display unit 27 is set in step S410. Item number "03" is deleted.
- step S411 the supply of the forced operation signal Sx from the forced operation signal supply unit 550 to the diagnosis target portion 101 is stopped.
- step S412 the stop instruction sent from the self-diagnosis stop instruction means 554 to the self-diagnosis function unit 9 of the ECU 1 is released, and the self-diagnosis by the self-diagnosis function unit 9 is restarted.
- step S408 If the diagnosis result of step S408 is not good in the subsequent EVP diagnosis, a diagnosis counter (not shown) is incremented each time in step S413. If it is determined in step S415 that the count value has exceeded the upper limit, the diagnosis stop flag Fstop 3 is set in step S415 so as not to hinder other failure diagnosis using the forced activation signal. Is In step S416, the supply of the forced operation signal Sx from the ECU 1 to the diagnosis target portion 101 is stopped. In step S417, the self-diagnosis stop instruction sent from the self-diagnosis stop instruction means 554 is released, and the self-diagnosis by the self-diagnosis function unit 9 is restarted.
- the external diagnostic device 2 when supplying the compulsory operation signal to the vehicle, the external diagnostic device 2 stops the self-diagnosis for the item whose diagnostic result may change due to the influence of the compulsory operation signal. Instruct the diagnostic function unit 9. Therefore, even though each part of the vehicle may show a different state from the normal state due to the effect of the forced operation signal, the self-diagnosis function may erroneously diagnose that an abnormality has occurred based on the state. There is no end.
- FIG. 14 is a flowchart showing a diagnosis method of “variable VT diagnosis” executed as step S500 of FIG. 8, and is executed using a forced operation signal in the same manner as in the above “EVP diagnosis”.
- “Variable VT diagnosis” is a diagnosis of the function of switching the valve opening / closing timing / valve lift amount between high speed and low speed in accordance with various conditions such as vehicle running speed and engine speed.
- the vehicle engine is equipped with two types of cams, each having a different shape, for each cylinder.
- Valve opening / closing timing and switching of valve lift are performed by switching the cam to be operated.
- the cam is switched by, for example, switching the hydraulic pressure supply destination by a solenoid valve.
- When operating the high-speed cam the hydraulic pressure is supplied to the high-speed hydraulic system and the low-speed cam is operated.
- the control is performed by controlling a solenoid valve so as to prevent the supply of hydraulic pressure to the high-speed hydraulic system. Therefore, in the “variable VT diagnosis”, it is determined whether or not the solenoid valve is correctly controlled as instructed.The specific determination is that the hydraulic response switch provided in the hydraulic system is correctly opened and closed. This is done based on whether it was done.
- step S 501 the selection flag F se Based on the lc4 and the pass flag F pass 4, whether or not the diagnostic item has been selected and whether the diagnosis has been passed or not are determined in the same manner as described above. If the diagnostic item has been selected but has not passed, the process proceeds to step S502. If so, proceed to the next diagnosis.
- step S502 the diagnosis stop flag Fstop4 is referred to. If the flag has been set, the process proceeds to the next diagnosis, and if not set, the process proceeds to step S503.
- the diagnosis stop flag Fstop4 is also set in step S513 described below when the “variable VT diagnosis” is not performed despite the fact that the “variable VT diagnosis” has been performed more than the predetermined number of times (or the predetermined time). You.
- step S503 it is determined whether the forced operation signal has already been transmitted from the ECU 1 for another diagnosis. If the determination is negative, in step S504, the high-speed side diagnosis flag F high 4 is set. It is determined whether or not it has been set. This flag Fhigh4 is set when the diagnosis for the high-speed cam is completed. Since the flag is not initially set, the process proceeds to step S505. In step S505, it is determined whether the forced operation signal Sx for operating the solenoid valve so that the high-speed cam is selected has already been transmitted from the ECU 1, and if not, the process proceeds to step S5. At 06, a command to output the forced operation signal Sx from the ECU 1 is sent from the forced operation signal supply means 550 to the ECU 1.
- step S507 the open / close state of the pressure switch provided in the hydraulic system of the high-speed cam is detected.
- This pressure switch has a structure in which a contact opens when a hydraulic pressure equal to or more than a specified value is applied to the system.
- the diagnostic means 553 diagnoses the pressure switch as good in step S508 and proceeds to step S508. Proceed to 509.
- step S509 the high speed side diagnosis flag Fhigh 4 is set, and in step S510, the forcible operation signal that had forcibly operated the solenoid valve so that the high speed cam is selected is stopped. Forced actuation of solenoid valve so that low speed cam is selected A signal is sent.
- step S507 the diagnostic means 553 diagnoses that the open state is not good in step S508, and the flow advances to step S511.
- step S511 the number-of-diagnosis counter 556 for the "variable VT diagnosis” is incremented in the same manner as described above.
- step S512 it is determined whether or not the number of diagnoses has exceeded the upper limit. If the number of diagnoses has not yet exceeded the upper limit, the process is performed according to the flowchart of FIG. In the embodiment, since the process proceeds to the diagnosis item 5 “Ne diagnosis”), the “variable VT diagnosis” waits until the next diagnosis timing.
- step S510 when the forced operation signal for selecting the low-speed cam is output in step S510, the process of FIG. 14 proceeds from step S504 to S520 in the diagnostic timing of the next routine.
- step S520 the open / close state of the pressure switch provided in the hydraulic system of the low-speed cam is detected, and in step S521, diagnosis is performed in the same manner as described above.
- the process proceeds to step S511 and the number of diagnoses is incremented.
- “1" is set to the diagnosis pass flag Fpass4 in step S522.
- step S523 the diagnostic item number "04" displayed on the display unit 27 is deleted.
- step S524 instructs the forced operation signal supply means 550 to stop sending the forced operation signal Sx.
- step S521 If the diagnostic result of step S521 is not good even in the subsequent diagnostic timing, the diagnostic counter 556 is incremented each time in step S511, and the count value is limited in step S512. If it is determined that the number of times has been exceeded, in step S513, 1 is set to the diagnosis stop flag Fstop4 as described above. In step S514.
- the supply stop means 555 instructs the forced operation signal supply means 550 to stop sending the forced operation signal Sx.
- FIGS. 15 and 16 are flowcharts showing a diagnosis method of “Ne diagnosis” of the diagnosis item 5 executed as step S600 of FIG.
- the “Ne diagnosis” is a diagnosis of whether or not the engine speed during idling is normal.
- the engine speed during idling Ne and a reference value (allowable speed tolerance NID-TRC) Is diagnosed based on the comparison result.
- step S601 based on the selection flag Fselc5 and the pass flag Fpass5 relating to the diagnostic item 5, it is determined whether or not the diagnostic item has been selected and whether or not the diagnostic item has passed in the same manner as described above. Proceed to step S602, otherwise proceed to the next diagnosis.
- step S602 it is determined whether a load such as the electric device / power steering is being used.
- a load such as the electric device / power steering
- the “Ne diagnosis” if the difference between the detected idling speed Ne and the target value is small, it is judged to be good. If a load that affects the engine speed such as the power engine load / electrical load is applied, To compensate for this, engine control is performed to set the idling speed higher than usual, so that accurate diagnosis of the idling speed becomes difficult. Therefore, in the present embodiment, prior to the “Ne diagnosis”, the presence or absence of a load is detected in advance in step S602, and if a load is detected, the diagnosis is not performed.
- step S603 it is determined whether idling is stable or not. If it is not stable, the process proceeds to step S620, and if it is stable, the process proceeds to step S604.
- step S604 the operation state of the timer MID is determined, and if it has not been started, it is started. In step S605, the cumulative number Cmesu is incremented. In step S606, the engine speed Ne is received from the ECU 1, and in step S607, the engine speed Ne detected at the timing of this "Ne diagnosis" and the integrated value ⁇ Ne up to the previous time are added. The sum is registered as a new integrated value ⁇ Ne.
- step S608 of FIG. 16 the timer MID is compared with a reference idling measurement time MID_ref which is one of the standard data. If the count value of the timer MID has reached the MID-ref, it is determined that the measurement period required for “Ne diagnosis” has elapsed, and the flow advances to step S609. In step S609, the number of times of idling diagnosis C ID is incremented. In step S610, the number of times of diagnosis C ID is compared with the reference idling diagnosis number C ID-ref which is one of the standard data.
- step S611 the average value of the rotational speed Ne is calculated by dividing the integrated value ⁇ Ne of the engine rotational speed Ne by the integrated number Cmesu.
- step S613 the absolute value of the difference between the average value of the rotation speed Ne and the non-standard data NID-ref is compared with the idling tolerance NID-TRC which is one of the standard data, and the absolute value of the difference between the two is compared. If is equal to or smaller than the tolerance NID-TRC, idling is diagnosed as normal and the process proceeds to step S614. If the absolute value of the difference between the two exceeds the tolerance N ID-TRC, the idling is diagnosed as abnormal, and the process proceeds to step S620, where the timer MID, the number of integration times Cmesu, and the accumulated value ⁇ Ne, which will be described later, are used. Proceed to the next diagnosis after resetting the variables.
- step S614 the diagnosis pass flag Fpass3 for the "Ne diagnosis” is set to "1". Is set, and in step S615, the diagnostic item numbers "05"("00" and “05” if "00" remains) displayed on the display unit 27 are erased.
- the detected engine speed Ne is integrated each time the “Ne diagnosis” is performed, and the average engine speed is calculated based on the integrated value ⁇ Ne. Diagnosis is made based on whether or not this average value falls within the reference range.Thus, even if a diagnosis method that cyclically repeats multiple diagnoses in a very short cycle is adopted, the ⁇ Ne diagnosis '' can be performed efficiently. You can do it.
- FIG. 17 is a flowchart showing a diagnostic method for diagnosing each switch system such as diagnostic items 6, 7,... Executed as step S700 in FIG. 8, and is a diagnosis target here. If both the ON state and the OFF state of each switch are detected, it is diagnosed as good.
- step S701 based on a diagnosis selection flag Fselc6 and a diagnosis pass flag Fpass6 relating to "various brake switch diagnosis", which is an example of the diagnosis item 6, the presence / absence of the selection of the diagnosis item and the diagnosis are performed as described above. Is determined. If “brake switch diagnosis” has been selected and has not passed yet, the process proceeds to step S702, and a diagnosis on switch-on and switch-off is executed. In step S703, it is determined whether or not the above-mentioned diagnosis is successful. If both the on-time and the off-time have passed, in step S704, "1" is set in a diagnosis pass flag Fpass6 relating to the switch diagnosis.
- step S705 the diagnostic item number "06" displayed on the display unit 27 is deleted. If the determinations in steps S7 ⁇ 1 and S703 are negative, the flow advances to step S710 to execute the next switch diagnosis (diagnosis item 7). In the same manner, the same diagnosis is performed for the other switches, and the numbers of the diagnostic items that have passed are displayed on the display 27. Are sequentially deleted.
- FIG. 18 is a flowchart showing the operation of "end processing" executed as step S800 in FIG.
- step S801 as a diagnosis result at the present time, for example, the number of a diagnosis item that has not yet passed diagnosis is associated with the identification code of the vehicle read in step S114 of FIG. Is stored in the RAM 22 (FIG. 1). This diagnosis result is rewritten every time the step S801 is executed, according to the diagnosis result at that time.
- the diagnostic results for a plurality of devices can be stored in the RAM 22 in association with the respective identification codes.
- the diagnostic results for a plurality of devices for example, 50 to 60 devices
- the diagnosis result is transmitted to the host computer 30 or other higher-level device via the transmission unit 24 by wireless communication. They are transferred together.
- the diagnostic results transferred for each of the plurality of devices are collectively stored in the storage device 33, and when data for the planned number (for example, several hundreds) is accumulated, this is stored in an IC card. Or a portable storage medium such as a floppy disk.
- step S802 of FIG. 18 all the diagnostic pass flags F pass x are referred to, and it is determined whether or not all diagnostic items have passed. If “1" is set to all the diagnostic pass flags F pass x X, the character "PASS" is displayed in large size on the display unit 27 in step S803 as shown in Fig. 6F. Then, the operator is notified of the end of the diagnosis.
- step S804 It is determined whether or not the communication cable 5 has been removed from the ECU 1. If the communication cable 5 has been removed, the power is cut off in step S805. If the communication cable 5 has not been disconnected, in step S808, it is determined whether or not a key operation for turning off the power has been performed by an operator. When the key operation has been performed, the process proceeds to step S805, and If the key operation has not been performed, the process returns to step S803.
- step S802 determines whether one or more diagnostic items, for example, diagnostic item 2 have not passed. If it is determined in step S802 that one or more diagnostic items, for example, diagnostic item 2 have not passed, the process proceeds to step S806. At this time, the display "02" remains on the display unit 27 as shown in FIG. 6C, so that the operator can easily recognize that only the diagnostic item 2 has not yet passed.
- the diagnosis result of the diagnosis item 5 depends on whether or not the display "00" remains. Judge the validity. That is, as described with reference to steps S610 and S611 of FIG. 16, the display "00" indicates that the preconditions of the diagnostic item 5 (for example, the engine is sufficiently warm and there is no load). It is erased when the condition is satisfied and the number of Ne diagnoses (CID) exceeds a predetermined number (CID> CID-ref). Therefore, if the display "00" also remains as shown in FIG. 6D, it means that the diagnosis end condition of item 5 is not satisfied. Therefore, the operator does not immediately determine that the diagnosis item 5 is defective, continues the Ne diagnosis, and determines that the display is good if the display "05" is erased.
- the display "00" indicates that the preconditions of the diagnostic item 5 (for example, the engine is sufficiently warm and there is no load). It is erased when the condition is satisfied and the number of Ne diagnoses (CID) exceeds a predetermined number (CID> CID-ref).
- an unsatisfied code “0 0” indicating whether or not this precondition is satisfied is displayed, so even if the diagnosis of the relevant diagnostic item has not passed, It is easy to recognize that the prerequisites are not satisfied, and a diagnostic item that is not necessarily defective is not erroneously determined to be defective.
- step S806 it is determined whether or not a switch operation for turning off the power is performed by an operator. When the switch operation is performed, the process proceeds to step S805. In step S807, it is determined whether or not the communication cable 5 has been removed from the ECU 1 if the switch operation has not been performed. When the communication cable 5 is removed, the process proceeds to the step S805 to turn off the power, and if not, the process proceeds to the next diagnosis to continue the diagnosis.
- FIG. 19 is a flowchart showing the operation of the “standby mode process” executed as step S900 in FIG.
- step S901 it is determined whether the apparatus is in the standby mode or not. Since the diagnosis mode is initially set, the process proceeds to step S902.
- step S902 the latest detected and read engine speed Ne is compared with the previously detected engine speed Ne_pre.
- the standby mode timer Tss is reset, and in step S904, the engine speed Ne detected this time is newly set as the previous engine speed Ne- ⁇ e. After registration, proceed to the next diagnosis (vehicle speed sensor diagnosis in this example).
- step S902 determines whether or not the timer Tss has been started. Since it is initially determined that the timer has not been started, the process proceeds to step S906, where the timer Tss is started.
- step S907 the count value of the timer Tss is compared with the standby mode start condition Tss-ref, which is one of the standard data. If the count value of the timer Tss exceeds the start condition Tss-ref (that is, if the engine stop determination in step S902 is continued for a predetermined time), in step S908, the process shifts from the diagnostic mode to the standby mode. However, the backlight of the display unit 27 and its liquid crystal drive are both turned off. The progress of the diagnosis up to now is temporarily stored in the RAM 22.
- step S909 the previous engine speed Ne-pre and the current engine speed Ne are compared.
- the two always match and the determination in step S909 is affirmative, so the standby mode is maintained.However, when the breaktime ends and the engine is restarted, the determination in step S909 is negative. And proceed to step S910.
- step S910 the operation mode of the process shifts from the standby mode to the diagnosis mode, and both the backlight of the display unit 27 and the liquid crystal drive are turned on.
- step S911 the engine speed Ne detected this time is newly registered as the previous engine speed Nepre, and then the process returns to “vehicle speed sensor diagnosis” described with reference to FIG. Fig. 8 shows the diagnostic processing performed. It is repeated cyclically as described.
- step S908 Shift from step S908 to step S901.
- step S909 If the determination in step S909 is affirmative, the process proceeds to step S910.
- step S911 is omitted, and the process shifts from step S910 to step S904.
- the shift from the diagnostic mode to the standby mode is automatically performed when the change in the engine speed is not detected, and the shift from the standby mode to the diagnostic mode is caused by the change in the engine speed. It is performed automatically if detected. Therefore, the operator only needs to stop the engine when the break time starts and the diagnosis is interrupted, and restart the engine when the break time ends and restart the diagnosis, no special operation is required. . Therefore, no extra burden is imposed on the operator when shifting from the diagnostic mode to the standby mode and from the standby mode to the diagnostic mode.
- the vehicle diagnosis method and apparatus of the present invention are used in an “inspection process” or the like in a production line of a factory.
- the present invention is not limited to this, and a The present invention can be similarly applied to a vehicle diagnosis method and apparatus used in another environment.
- the diagnosis of a plurality of items is cyclically repeated in a very short cycle irrespective of the pass / fail, and a diagnosis item which still does not pass even after the scheduled time has elapsed or the scheduled number of cycles has been performed is diagnosed as a failure.
- the present invention is not limited to this, and a vehicle diagnostic method and apparatus that supplies a forced operation signal separately from the outside to a vehicle having a self-diagnosis function and performs vehicle diagnosis independently of the self-diagnosis function. If applicable, it can be applied to any vehicle diagnosis method and device.
- the self-diagnosis function unit of the ECU 1 An instruction to stop the self-diagnosis was sent to 9, but the present invention is not limited to this, and the same reference numerals as those in FIG. 7 represent the same parts.
- a self-diagnosis function unit 9 is provided with a self-diagnosis stop unit 9a, and the self-diagnosis function unit 9 supplies a forced operation signal.
- the self-diagnosis may be stopped or the self-diagnosis result may be invalidated by detecting the self-diagnosis.
- the self-diagnosis of at least the items whose diagnostic results can be changed under the influence of the forced operation signal is stopped. Is done. Therefore, even if each part of the vehicle shows a state different from the normal state due to the influence of the forced operation signal, the self-diagnosis function does not mistakenly diagnose that an abnormality has occurred based on the state.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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BR9805924-6A BR9805924A (pt) | 1997-03-10 | 1998-03-10 | Método e aparelho para diangóstico de veìculo |
US09/147,144 US6134488A (en) | 1997-03-10 | 1998-03-10 | Method and device for diagnosis for vehicle |
CA002247425A CA2247425C (en) | 1997-03-10 | 1998-03-10 | Method and device for diagnosis for vehicle |
EP98905830A EP0935130A4 (en) | 1997-03-10 | 1998-03-10 | DEVICE AND METHOD FOR VEHICLE DIAGNOSIS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP9/70910 | 1997-03-10 | ||
JP7091097A JPH10253505A (ja) | 1997-03-10 | 1997-03-10 | 車両診断方法および装置 |
Publications (1)
Publication Number | Publication Date |
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WO1998040715A1 true WO1998040715A1 (fr) | 1998-09-17 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP1998/000975 WO1998040715A1 (fr) | 1997-03-10 | 1998-03-10 | Procede et dispositif de diagnostic de vehicule |
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US (1) | US6134488A (ja) |
EP (1) | EP0935130A4 (ja) |
JP (1) | JPH10253505A (ja) |
BR (1) | BR9805924A (ja) |
CA (1) | CA2247425C (ja) |
WO (1) | WO1998040715A1 (ja) |
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DE102017112817A1 (de) * | 2017-06-12 | 2018-12-13 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Inbetriebnahme-Steuergerät eines Verbunds aus Steuergeräten eines Kraftfahrzeugs und Verfahren zur Inbetriebnahme von Steuergeräten |
EP3567443A4 (en) * | 2018-03-21 | 2020-07-29 | Shenzhen Launch Software Co., Ltd. | PROCESS AND SYSTEM FOR GRAPHIC DISPLAY OF A DATA STREAM AND AUTOMOTIVE DIAGNOSIS APPARATUS |
CN112578767A (zh) * | 2020-12-03 | 2021-03-30 | 斯比泰电子(嘉兴)有限公司 | 一种汽车电动尾门控制单元快速检测设备 |
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- 1998-03-10 US US09/147,144 patent/US6134488A/en not_active Expired - Fee Related
- 1998-03-10 EP EP98905830A patent/EP0935130A4/en not_active Withdrawn
- 1998-03-10 CA CA002247425A patent/CA2247425C/en not_active Expired - Fee Related
- 1998-03-10 BR BR9805924-6A patent/BR9805924A/pt not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
---|---|
CA2247425C (en) | 2003-04-15 |
US6134488A (en) | 2000-10-17 |
EP0935130A1 (en) | 1999-08-11 |
CA2247425A1 (en) | 1998-09-17 |
EP0935130A4 (en) | 2003-01-02 |
JPH10253505A (ja) | 1998-09-25 |
BR9805924A (pt) | 1999-08-31 |
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