JP3799795B2 - Vehicle diagnostic system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle diagnosis system that wirelessly transmits failure diagnosis information based on vehicle self-diagnosis to an external base station.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a vehicle diagnosis system, there is known a vehicle diagnosis system that self-diagnose abnormality of various sensors and actuator systems, stores a diagnosis result when a failure occurs, and has a fail-safe function. In such a vehicle diagnosis system, stored failure diagnosis information can be read out to an externally connected monitor as necessary, and inspection, repair, and maintenance can be performed on a specified failure location.
[0003]
[Problems to be solved by the invention]
By the way, in the case where there is no hindrance to normal driving even if some trouble occurs in the vehicle, it may be possible to continue driving as it is, so that inspection, repair and maintenance can be postponed without noticing. For example, even if an ignition system of a four-cylinder internal combustion engine fails and only one cylinder is poorly ignited, the engine output is reduced, but traveling with three cylinders is possible. At this time, the raw gas from the poorly ignited cylinder is mixed in the exhaust gas, so that the normal purification action by the catalyst cannot be performed, and as a result, the emission deteriorates and adversely affects the surrounding environment.
[0004]
In order to deal with such inconveniences, the above-mentioned vehicle diagnostic system is developed, a vehicle transponder (Transponder) is incorporated into the vehicle, and the vehicle failure diagnosis information is transmitted wirelessly to an external base station. A vehicle diagnosis system that can detect the situation is conceivable. Then, when failure diagnosis information from the vehicle is received at the base station, a repair request is made to the user of the vehicle using a method such as a postcard, so that inspection, repair and maintenance of the failure point of the vehicle can be performed. There is an advantage that it is implemented promptly.
[0005]
However, after the vehicle failure diagnosis information is transmitted to the base station, the base station transmits the failure diagnosis information even if the user voluntarily inspects / repairs / maintains the vehicle at a repair shop etc. Since it is not known that the vehicle has been repaired, if the repaired report is too late, an improper and useless process of requesting the repaired vehicle again will be performed.
[0006]
Therefore, the present invention has been made to solve such a problem, and when carrying out inspection / repair / maintenance corresponding to vehicle failure diagnosis information, between the base station that receives the failure diagnosis information and the vehicle. An object of the present invention is to provide a vehicle diagnosis system that can eliminate inappropriate and wasteful processing.
[0007]
[Means for Solving the Problems]
According to the vehicle diagnosis system of claim 1, after failure diagnosis information based on abnormality due to vehicle self-diagnosis is wirelessly transmitted from the vehicle to the base station side, vehicle abnormality corresponding to the failure diagnosis information is detected. of Resolution (repair) Detected When Resolve this anomaly as it was implemented. Abnormality elimination information is similarly transmitted wirelessly from the vehicle to the base station. As a result, when the failure diagnosis information of the vehicle is received at the base station and the corresponding error resolution information is received, a request for inspection, repair, or maintenance of the vehicle from the base station to the user can be omitted. Wasteful processing between the vehicle and the base station can be eliminated.
[0008]
According to the vehicle diagnosis system of claim 2, after the failure diagnosis information based on the abnormality due to the self-diagnosis of the vehicle is wirelessly transmitted from the vehicle to the base station side, the instruction corresponding to the failure diagnosis information accepted by the user side Based on content The Vehicle abnormality of Resolution (repair) Detected When Resolve this anomaly as it was implemented. Abnormality elimination information is similarly transmitted wirelessly from the vehicle to the base station. As a result, when the base station receives the abnormality resolution information based on the content of the vehicle inspection / repair / maintenance to the user corresponding to the vehicle failure diagnosis information received by the base station, You can know exactly the completion status of the content.
[0009]
In the vehicle diagnosis system according to claim 3, when the elimination of the abnormality corresponding to the vehicle failure diagnosis information is detected, the abnormality elimination information is transmitted from the vehicle to the base station side by the abnormality elimination information communication means, and the abnormality elimination information is obtained. Reply information based on the reception on the base station side is returned to the vehicle side. At this time, the abnormality resolution information is repeatedly transmitted at a predetermined timing in order to cope with the fact that the abnormality resolution information is not recognized or does not arrive at the base station for some reason. As a result, the probability that the abnormality elimination information from the vehicle is received by the base station becomes extremely high, and the repaired vehicle is requested to be repaired again. Processing can be eliminated.
[0010]
In the vehicle diagnosis system according to the fourth aspect, when reply information from the base station is received by the vehicle, after that, it is not necessary to transmit the abnormality resolution information, so that the transmission is stopped and the abnormality resolution information is erased. . As a result, it is possible to eliminate inappropriate and wasteful processing between the vehicle and the base station, in which the abnormality elimination information from the vehicle is transmitted despite being received by the base station.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples.
[0012]
FIG. 1 is a block diagram showing the overall configuration of a vehicle diagnostic system according to an example of an embodiment of the present invention.
[0013]
In FIG. 1, reference numeral 100 denotes an internal combustion engine ECU (Electronic Control Unit) for controlling an internal combustion engine (not shown) of the vehicle 1. The internal combustion engine ECU 100 mainly includes a microcomputer 10, various sensor information and loads. It comprises an input / output circuit 20 for inputting / outputting information, a main power supply circuit 30 and a sub power supply circuit 40. The microcomputer 10 and the input / output circuit 20 in the ECU 100 for the internal combustion engine are connected to a main power supply circuit 30 connected to the in-vehicle battery 400 via the ignition switch 300, and power is supplied when the ignition switch 300 is turned on. Is done. Further, the microcomputer 10 is connected to the memory backup sub-power supply circuit 40 connected to the in-vehicle battery 400 without passing through the ignition switch 300 and is always supplied with power.
[0014]
The microcomputer 10 is configured as a logical operation circuit including a CPU 11 as a known central processing unit, a ROM 12 storing a control program, a RAM 13 storing various data, an I / O 14, a bus line 15 connecting them, and the like. . The microcomputer 10 of the ECU 100 for the internal combustion engine includes various sensors for controlling the internal combustion engine, an A / F (air / fuel ratio) sensor 21 as a load, an engine speed sensor 22, an air flow meter via an input / output circuit 20. 23, a water temperature sensor 24, a throttle opening sensor 25, a starter switch 26, an injector 27, an igniter 28, and the like are connected. Note that detailed descriptions of these various sensors are omitted because they are not related to the gist of the present invention.
[0015]
Further, in the input / output circuit 20 of the internal combustion engine ECU 100, the failure diagnosis information stored in the RAM 13 in the microcomputer 10 of the internal combustion engine ECU 100 is read from the outside of the vehicle 1, and vehicle abnormality is detected as described later. When canceled (repaired), an OBD (On Board Diagnosis) checker 29 for writing to that effect is connected.
[0016]
Reference numeral 200 denotes a wireless transponder (repeater) for wirelessly transmitting various information of the vehicle 1 based on an inquiry from the external base station 2. The wireless transponder 200 mainly includes a microcomputer 110, an input / output circuit 120 for inputting / outputting various information, and a power supply circuit 130. The microcomputer 110 and the input / output circuit 120 in the wireless transponder 200 are connected to the power supply circuit 130 connected to the in-vehicle battery 400 without passing through the ignition switch 300 and are always supplied with power.
[0017]
The microcomputer 110 is configured as a logical operation circuit including a CPU 111 as a known central processing unit, a ROM 112 storing a control program, a RAM 113 storing various data, an I / O 114, a bus line 115 connecting them, and the like. . In addition, an EEPROM (Electrical Erasable Programmable ROM) 150 as a nonvolatile memory is connected to the microcomputer 110 in the radio transponder 200, and a vehicle code (vehicle type, type, The chassis number etc. are stored. By reading the vehicle code from the EEPROM 150 as necessary and adding it to the failure diagnosis information and transmitting it to the base station 2, the base station 2 can identify the failed vehicle and the failure location.
[0018]
The internal combustion engine ECU 100 and the wireless transponder 200 are connected to each other via a communication line 500. Various information of the vehicle 1 by this system is transmitted to the external base station 2 by radio from the built-in antenna 140 via the input / output circuit 120 of the radio transponder 200. Further, the communication line 500 includes a GPS (Global Positioning System) navigation ECU (not shown) for obtaining position information of the vehicle 1 and a meter ECU (not shown) for controlling an electronic meter, if necessary. Is connected.
[0019]
Next, various control processing procedures related to the internal combustion engine in the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine of the vehicle 1 used in the vehicle diagnosis system according to an example of the embodiment of the present invention will be described. This will be described based on the flowchart of FIG. The various control routines are repeatedly executed when the ignition switch 300 is in the on state.
[0020]
In FIG. 2, first, initialization of various sensor data and counters in the RAM 13 is executed in step S101, and then the process proceeds to step S102, where processing for EFI (Electronic Fuel Injection) control is executed. Next, it transfers to step S103 and the process with respect to ESA (Electronic Spark Advance: electronic ignition timing) control is performed. Next, the process proceeds to step S104, and a diagnosis process relating to the internal combustion engine is executed. Thereafter, after various other control processes are sequentially executed, the process returns to step S102 and the same process is repeated.
[0021]
Next, a processing procedure of diagnosis related to the internal combustion engine in the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine of the vehicle 1 used in the vehicle diagnosis system according to an example of the embodiment of the present invention will be described. This will be described based on the flowchart of FIG. This diagnosis routine is repeatedly executed by the CPU 11 about every 64 ms.
[0022]
In FIG. 3, in step S201, it is determined whether the throttle opening sensor 25 is abnormal. When the determination condition of step S201 is satisfied, that is, when the output signal from the throttle opening sensor 25 is abnormal because it is out of the upper and lower limits due to open / short, the process proceeds to step S202. In step S202, a failure diagnosis code corresponding to the throttle opening sensor abnormality is stored in the RAM 13. On the other hand, when the determination condition of step S201 is not satisfied, that is, when there is no abnormality in the throttle opening sensor 25, step S202 is skipped.
[0023]
Next, the process proceeds to step S203, and it is determined whether the water temperature sensor 24 is abnormal. When the determination condition of step S203 is satisfied, that is, when the output signal from the water temperature sensor 24 is abnormal, the process proceeds to step S204. In step S204, a failure diagnosis code corresponding to the water temperature sensor abnormality is stored in the RAM 13. On the other hand, when the determination condition of step S203 is not satisfied, that is, when there is no abnormality in the water temperature sensor 24, step S204 is skipped.
[0024]
Thereafter, similarly, failure diagnosis processing for appropriate states of, for example, an injector and a catalyst as other related sensors and related parts of the internal combustion engine is sequentially executed. Then, the process proceeds to step S205, and it is determined whether a misfire of the internal combustion engine is detected. When the determination condition of step S205 is satisfied, that is, when a misfire of the internal combustion engine is detected, the process proceeds to step S206. In step S206, a failure diagnosis code corresponding to misfire is stored in the RAM 13. On the other hand, when the determination condition of step S205 is not satisfied, that is, when there is no misfire of the internal combustion engine, step S206 is skipped.
[0025]
Next, the process proceeds to step S207, and in order to determine whether or not a new abnormality has been stored in a series of failure diagnosis code storage processing, the stored failure diagnosis code is checked to determine whether the content has changed. Is done. When the determination condition of step S207 is satisfied, that is, when there is a change in the stored contents, the process proceeds to step S208, fault diagnosis information is output based on a request from the wireless transponder 200, and this routine is terminated. If the determination condition in step S207 is not satisfied, that is, if there is no change in the stored contents, step S208 is skipped and this routine is terminated.
[0026]
Next, a process for storing an operation state associated with abnormality detection by diagnosis in the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine of the vehicle 1 used in the vehicle diagnosis system according to an example of the embodiment of the present invention. The procedure will be described based on the flowchart of FIG. This operation state storage routine is repeatedly executed by the CPU 11 about every 64 ms.
[0027]
In FIG. 4, in step S301, it is determined based on the state of various sensor signals whether there is an abnormality such as misfire or catalyst deterioration in the internal combustion engine, or an abnormality in an emission (exhaust gas) related component of the internal combustion engine. If the determination condition in step S301 is satisfied, that is, if there is an abnormality such as misfire or catalyst deterioration in the internal combustion engine, or an abnormality in the emission (exhaust gas) related parts of the internal combustion engine, the process proceeds to step S302, and the abnormality detected in step S301 Is a previously detected anomaly. When the determination condition in step S302 is not satisfied, that is, when the abnormality detected in step S301 is a newly detected abnormality, the process proceeds to step S303, and the operating states of the vehicle and the internal combustion engine at the time when the abnormality is detected. Is stored, and this routine ends.
[0028]
Note that the stored operating state includes the engine speed by the speed sensor 22 at that time, the intake air amount by the air flow meter 23, the cooling water temperature by the water temperature sensor 24, the throttle opening by the throttle opening sensor 25, and the like. When the electronic meter ECU is connected via the communication line 500, the vehicle travel distance is included, and when the GPS navigation ECU is connected, information such as the vehicle position is also included. In this way, the various stored information is used for abnormality analysis when diagnosing the vehicle, and is output to the radio transponder 200 via the communication line 500 based on a request from the radio transponder 200. The Further, these various pieces of information are part of failure diagnosis information transmitted from the radio transponder 200 to the base station 2 based on an inquiry from the base station 2.
[0029]
On the other hand, when the determination condition of step S301 is not satisfied, that is, when there is no abnormality in various sensors or actuators, or when the determination condition of step S302 is satisfied, that is, the abnormality detected in step S301 has been detected before If this is the case, this routine is terminated without doing anything.
[0030]
Next, externally connected to the input / output circuit 20 in the internal combustion engine ECU 100 in the CPU 11 in the microcomputer 10 of the internal combustion engine ECU 100 of the vehicle 1 used in the vehicle diagnostic system according to an example of the embodiment of the present invention. A repaired code storage processing procedure when a repaired code is transmitted from the connected OBD checker 29 will be described with reference to the flowchart of FIG. This repaired code storage routine is repeatedly executed by the CPU 11 about every 64 ms.
[0031]
In FIG. 5, it is determined whether or not a repaired code has been transmitted from the OBD checker 29 in step S401. When the determination condition of step S401 is satisfied, that is, when a repaired code is transmitted from the OBD checker 29, the process proceeds to step S402, and it is determined whether the repaired code transmitted from the OBD checker 29 is stored. . When the determination condition of step S402 is not satisfied, that is, when the repaired code is not yet stored, the process proceeds to step S403, and the repaired code is stored in the storage area in the RAM 13. In step S404, a post-transmission trip counter, which will be described later, is initialized to “0”. In step S405, the transmission history flag set when the repaired code is transmitted to the wireless transponder 200 is initialized to “0” as not yet executed. Next, the process proceeds to step S406, where a reply flag described later is initialized to “0”, and this routine is terminated. In this way, the repaired code is stored in the RAM 13 of the microcomputer 10 of the internal combustion engine ECU 100, and preparation for transmission to the radio transponder 200 is prepared.
[0032]
On the other hand, when the determination condition of step S401 is not satisfied, that is, when the repaired code is not transmitted from the OBD checker 29, or when the determination condition of step S402 is satisfied, that is, the repaired code from the OBD checker 29 is already stored. If there are multiple transmissions by mistake, this routine is terminated without doing anything.
[0033]
Next, the post-transmission trip counter initialized in step S404 of FIG. 5 will be described based on the flowchart of FIG. This processing routine is repeatedly executed by the CPU 11 for each initialization routine.
[0034]
In FIG. 6, in step S501, a post-transmission trip counter, which is a counter for counting the number of trips as the number of times the ignition switch 300 is turned on after transmission of the repaired code, is incremented by “1”, and this routine is terminated. As a result, after the repaired code is transmitted, it is avoided that it is transmitted every time the ignition switch 300 is turned on. In other words, the reply information from the base station 2 may be delayed for some reason, so that the reply information is waited for without being retransmitted for a period of 10 trips when the ignition switch 300 is turned on ten times. In addition, since it is necessary to retransmit when the repaired code is not recognized or does not arrive at the base station 2, it is retransmitted every 10 trips.
[0035]
Next, the response flag initialized in step S406 of FIG. 5 will be described based on the flowchart of FIG. This processing routine is repeatedly executed by the CPU 11 at every data reception interrupt timing from the radio transponder 200.
[0036]
In FIG. 7, it is determined in step S601 whether reply information corresponding to the repaired code has been received. If the determination condition in step S601 is satisfied, that is, if the reply information from the base station 2 corresponding to the repaired code transmitted from the wireless transponder 200 is received by the wireless transponder 200, the process proceeds to step S602 and the response The flag is set to “1” and this routine is terminated. On the other hand, when the determination condition of step S601 is not satisfied, that is, when the return information from the base station 2 is not received, step S602 is skipped, and this routine ends.
[0037]
Next, a repaired code transmission process to the radio transponder 200 by the CPU 11 in the microcomputer 10 of the internal combustion engine ECU 100 of the vehicle 1 used in the vehicle diagnosis system according to an example of the embodiment of the present invention. The procedure will be described based on the flowchart of FIG. This repaired code transmission processing routine is repeatedly executed by the CPU 11 about every 64 ms.
[0038]
In FIG. 8, first, in step S701, it is determined whether a repaired code is stored. When the determination condition of step S701 is satisfied, that is, when a repaired code is stored, the process proceeds to step S702, where it is determined whether the response flag is “1”. If the determination condition in step S702 is not satisfied, that is, if the reply flag is “0” and the reply information from the base station 2 has not been received yet, the process proceeds to step S703, and whether the transmission history flag is “1”. Determined. When the determination condition of step S703 is satisfied, that is, when a repaired code has already been transmitted, the process proceeds to step S704, where it is determined whether the post-transmission trip counter is 10 times or more. If the determination condition in step S704 is satisfied, that is, the post-transmission trip counter is 10 times or more, or if the determination condition in step S703 is not satisfied, that is, if the transmission has never been performed, the processing from step S705 is executed. The In step S705, after the repaired code transmission process is executed, the process proceeds to step S706, and the transmission history flag is set to “1”. Next, the process proceeds to step S707, the post-transmission trip counter is cleared to “0”, and this routine ends.
[0039]
On the other hand, when the determination condition in step S702 is satisfied, that is, when the reply flag is “1” and the reply information from the base station 2 is received, the process proceeds to step S708, and this routine is terminated after the repaired code is erased. To do. When the determination condition of step S701 is not satisfied, that is, when the repaired code is not stored, the determination condition of step S704 is not satisfied, that is, when the post-transmission trip counter is less than 10 and waiting for reply information. This routine ends without doing anything.
[0040]
As described above, the vehicle diagnosis system according to the present embodiment wirelessly transmits failure diagnosis information based on self-diagnosis of the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine of the vehicle 1 to the external base station 2 at a predetermined timing. Diagnostic information communication means achieved by the CPU 111 in the microcomputer 110 of the wireless transponder 200 and the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine ECU 100 detecting the elimination of the abnormality corresponding to the failure diagnosis information. When the abnormality elimination detection means and the abnormality elimination detection means detect the elimination of the abnormality, the base station 2 This means that the abnormality is resolved as the abnormality corresponding to the failure diagnosis information of the vehicle 1 is resolved. It comprises an abnormality elimination information communication means achieved by the CPU 111 in the microcomputer 110 of the wireless transponder 200 for transmitting the abnormality elimination information by radio.
[0041]
That is, the self-diagnosis of the vehicle 1 is executed by the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine. At this time, if any abnormality is detected, the failure diagnosis information is transmitted from the internal combustion engine ECU 100 to the radio transponder 200 side. Then, this failure diagnosis information is wirelessly transmitted to the base station 2 by the CPU 111 in the microcomputer 110 of the wireless transponder 200 that achieves the diagnosis information communication means. In the microcomputer 10 of the ECU 100 for the internal combustion engine in which the abnormality corresponding to the failure diagnosis information of the vehicle 1 is eliminated (repaired), and the repaired code as the abnormality elimination information representing the elimination of the abnormality achieves the abnormality elimination detection means. Is detected by the CPU 11, the corresponding repaired code is transmitted from the internal combustion engine ECU 100 to the radio transponder 200, and the repaired code as the fault elimination information serves as the fault elimination information communication means. Is transmitted to the base station 2 by the CPU 111 in the microcomputer 110.
[0042]
Therefore, after failure diagnosis information based on the abnormality of the vehicle 1 is wirelessly transmitted from the vehicle 1 to the base station 2 side, the abnormality of the vehicle 1 corresponding to the failure diagnosis information is transmitted. of Resolution (repair) Detected When Resolve this anomaly as it was implemented. A repaired code as abnormality elimination information is similarly transmitted from the vehicle 1 to the base station 2 by radio. As a result, when the base station 2 receives the failure diagnosis information of the vehicle 1 and then receives the corresponding abnormality resolution information, the base station 2 omits a request regarding the inspection, repair, and maintenance of the vehicle 1 from the user. And wasteful processing between the vehicle 1 and the base station 2 can be eliminated.
[0043]
Further, the vehicle diagnosis system of the present embodiment is for wireless transmission in which failure diagnosis information by self-diagnosis of the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine of the vehicle 1 is wirelessly transmitted to the external base station 2 at a predetermined timing. In the microcomputer 10 of the ECU 100 for the internal combustion engine that detects the diagnosis information communication means achieved by the CPU 111 in the microcomputer 110 of the transponder 200 and the cancellation of the abnormality based on the instruction content from the base station 2 corresponding to the failure diagnosis information When the abnormality elimination detection means achieved by the CPU 11 and the abnormality elimination detection means detect the elimination of the abnormality, the base station 2 This means that the abnormality is resolved as the abnormality based on the instruction content from the base station 2 corresponding to the failure diagnosis information of the vehicle 1 is implemented. The apparatus includes an abnormality elimination information communication means that is achieved by the CPU 111 in the microcomputer 110 of the wireless transponder 200 for transmitting the abnormality elimination information wirelessly.
[0044]
That is, the self-diagnosis of the vehicle 1 is executed by the CPU 11 in the microcomputer 10 of the ECU 100 for the internal combustion engine. At this time, if any abnormality is detected, the failure diagnosis information is transmitted from the internal combustion engine ECU 100 to the radio transponder 200 side. Then, this failure diagnosis information is wirelessly transmitted to the base station 2 by the CPU 111 in the microcomputer 110 of the wireless transponder 200 that achieves the diagnosis information communication means. The base station 2 corresponding to the failure diagnosis information is subjected to the cancellation (repair) of the abnormality based on the contents of the instruction regarding the inspection, repair, and maintenance of the vehicle 1 to the user, and the repaired code as the abnormality resolution information representing the cancellation of the abnormality Is detected by the CPU 11 in the microcomputer 10 of the internal combustion engine ECU 100 that achieves the abnormality elimination detection means, the corresponding repaired code is transmitted from the internal combustion engine ECU 100 to the radio transponder 200 side, and this abnormality elimination information is obtained. The repaired code is wirelessly transmitted to the base station 2 by the CPU 111 in the microcomputer 110 of the wireless transponder 200 that achieves the abnormality elimination information communication means.
[0045]
Therefore, after failure diagnosis information based on the abnormality of the vehicle 1 is wirelessly transmitted from the vehicle 1 to the base station 2 side, it is based on the instruction content corresponding to the failure diagnosis information received on the user side. The Abnormality of vehicle 1 of Resolution (repair) Detected When Resolve this anomaly as it was implemented. A repaired code as abnormality elimination information is similarly transmitted from the vehicle 1 to the base station 2 by radio. As a result, the base station 2 receives the abnormality resolution information based on the content of the instruction regarding the inspection, repair, and maintenance of the vehicle 1 to the user corresponding to the failure diagnosis information of the vehicle 1 received at the base station 2. Thus, the completion state of the instruction content for the vehicle 1 can be accurately known.
[0046]
The vehicle diagnosis system according to the present embodiment returns the return information from the base station 2 to the effect that the abnormality elimination information communication means achieved by the CPU 111 in the microcomputer 110 of the wireless transponder 200 has received the abnormality elimination information. Abnormality resolution information is repeatedly transmitted at a predetermined timing until it is received by one side. That is, when the removal of the abnormality corresponding to the failure diagnosis information of the vehicle 1 is detected, the repaired code as the abnormality removal information is received by the CPU 111 in the microcomputer 110 of the wireless transponder 200 that achieves the abnormality removal information communication means. Reply information is transmitted from the vehicle 1 to the base station 2 side and reply information based on reception of the abnormality elimination information on the base station 2 side is returned to the vehicle 1 side. At this time, in order to cope with the fact that the repaired code is not recognized or does not arrive at the base station 2 for some reason, the repaired code is repeatedly transmitted every predetermined timing when the trip counter becomes 10, for example, after transmission. Is done. As a result, the probability that the repaired code from the vehicle 1 is received by the base station 2 becomes extremely high, and the repair between the vehicle 1 and the base station 2 is requested again for the repaired vehicle 1. Inappropriate and useless processing can be eliminated.
[0047]
Further, in the vehicle diagnostic system of this embodiment, when the return information is received by the CPU 111 in the microcomputer 110 of the wireless transponder 200 of the vehicle 1, the transmission of the repaired code as the abnormality resolution information is stopped and the internal combustion engine The repaired code stored in the RAM 13 in the microcomputer 10 of the engine ECU 100 is erased. That is, when reply information from the base station 2 is received by the vehicle 1, it is not necessary to transmit a repaired code after that, so transmission is stopped and the repaired code is erased. Accordingly, it is possible to eliminate an inappropriate and wasteful process between the vehicle 1 and the base station 2 in which the repaired code from the vehicle 1 is transmitted although it is received by the base station 2.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of a vehicle diagnosis system according to an example of an embodiment of the present invention.
FIG. 2 is a flowchart showing processing procedures of various controls related to the internal combustion engine in the CPU in the microcomputer of the ECU for the internal combustion engine in the vehicle diagnosis system according to an example of the embodiment of the present invention;
FIG. 3 is a flowchart showing a processing procedure of a diagnosis related to the internal combustion engine in a CPU in the microcomputer of the ECU for the internal combustion engine in the vehicle diagnosis system according to an example of the embodiment of the present invention;
FIG. 4 is a flowchart showing a processing procedure for storing an operation state associated with abnormality detection by diagnosis in a CPU in a microcomputer of an ECU for an internal combustion engine in a vehicle diagnosis system according to an embodiment of the present invention; It is.
FIG. 5 is a flowchart showing a repaired code storage processing procedure in the CPU in the microcomputer of the ECU for the internal combustion engine in the vehicle diagnosis system according to an example of the embodiment of the present invention;
6 is a flowchart showing a processing procedure of a post-transmission trip counter in FIG. 5;
FIG. 7 is a flowchart showing a processing procedure of a reply flag in FIG.
FIG. 8 is a flowchart showing a repaired code transmission processing procedure in the CPU in the microcomputer of the ECU for the internal combustion engine in the vehicle diagnosis system according to an example of the embodiment of the present invention;
[Explanation of symbols]
1 vehicle
2 base stations
29 OBD Checker
300 Ignition switch

Claims (4)

Diagnostic information communication means for wirelessly transmitting failure diagnosis information based on vehicle self-diagnosis to an external base station at a predetermined timing;
An abnormality elimination detecting means for detecting the elimination of the abnormality corresponding to the failure diagnosis information;
When the abnormality elimination detecting means detects the elimination of the abnormality, it is assumed that the abnormality corresponding to the vehicle failure diagnosis information is eliminated in the base station, and the abnormality elimination information indicating the elimination of the abnormality is wirelessly transmitted. A vehicle diagnosis system comprising: an abnormality elimination information communication means for transmitting at Diagnostic information communication means for wirelessly transmitting failure diagnosis information based on vehicle self-diagnosis to an external base station at a predetermined timing;
An abnormality elimination detecting means for detecting the elimination of the abnormality based on the instruction content from the base station corresponding to the failure diagnosis information;
When the abnormality elimination detecting means detects the elimination of the abnormality, it is assumed that the abnormality based on the instruction content from the base station corresponding to the vehicle failure diagnosis information is resolved in the base station. A vehicle diagnosis system comprising: an abnormality elimination information communication means for wirelessly transmitting anomaly elimination information representing the elimination of an error.   The abnormality elimination information communication means repeatedly transmits the abnormality elimination information at a predetermined timing until the vehicle side receives return information from the base station indicating that the abnormality elimination information has been received. The vehicle diagnostic system according to claim 1 or 2.   The vehicle diagnosis system according to claim 3, wherein when the reply information is received, the vehicle stops transmission of the abnormality elimination information and deletes the abnormality elimination information.

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