Vehicular system, ecu, storing instruction transmission device, and storing request transmission device

Abstract

A vehicular system includes a master ECU, a first slave ECU, and a second slave ECU. The second slave ECU transmits a storing request to the master ECU on detection of a malfunction. The master ECU transmits a storing instruction for causing diagnostic information to be stored, on reception of the storing request. The first slave ECU generates diagnostic information on the first slave ECU, on reception of the storing instruction from the master ECU. The first slave ECU further stores the generated diagnostic information in a retention storage medium. The retention storage medium is configured to retain validity determination information in a condition where the first slave ECU is not supplied with electric power source.

1 . A vehicular system equipped to a vehicle, the vehicular system comprising:
 a master ECU;   a first slave ECU; and   a second slave ECU, wherein the second slave ECU is configured to transmit a storing request to the master ECU on detection of a malfunction,   the master ECU is configured to transmit a storing instruction on reception of the storing request, and   the first slave ECU is configured, on reception of the storing instruction from the master ECU:
 to generate diagnostic information on the first slave ECU; and 
 to store the generated diagnostic information in a retention storage medium, the retention storage medium being configured to retain validity determination information in a condition where the first slave ECU is not supplied with electric power. 
   
     
     
         2 . The vehicular system according to  claim 1 , wherein
 the second slave ECU is further configured to include a malfunction classification code, which represents a classification of the malfunction, in the storing request to be transmitted to the master ECU,   the master ECU is further configured to include the malfunction classification code, which is included in the storing request received from the second slave ECU, in the storing instruction to be transmitted, and   the first slave ECU is further configured to include the malfunction classification code, which is included in the storing instruction received from the master ECU, in the diagnostic information on the first slave ECU.   
     
     
         3 . The vehicular system according to  claim 1 , wherein
 the second slave ECU is further configured to include a predetermined system identification code in the storing request to be transmitted to the master ECU,   the master ECU is further configured to include the system identification code, which is included in the storing request received from the second slave ECU, in the storing instruction to be transmitted, and   the first slave ECU is further configured to determine whether to store the diagnostic information on the first slave ECU according to the system identification code included in the storing instruction received from the master ECU.   
     
     
         4 . The vehicular system according to  claim 3 , wherein
 the system identification code, which the second slave ECU includes in the storing request, is related to the detected malfunction,   the first slave ECU is further configured:
 to store the diagnostic information on the first slave ECU, when the system identification code, which is included in the storing instruction received from the master ECU, corresponds to a group to which the first slave ECU belongs; and 
 not to store the diagnostic information on the first slave ECU, when the system identification code, which is included in the storing instruction received from the master ECU, does not correspond to the group to which the first slave ECU belongs. 
   
     
     
         5 . The vehicular system according to  claim 1 , wherein
 the first slave ECU is further configured:
 to select data according to the system identification code included in the storing instruction received from the master ECU; and 
 to include the selected data in the diagnostic information and store the diagnostic information. 
   
     
     
         6 . The vehicular system according to  claim 1 , further comprising:
 a third slave ECU, wherein   the master ECU is further configured:
 to change a value of elapsed time information by a time unit according to elapse of time; 
 to generate a vehicle local time including the elapsed time information; and 
 to transmit the generated vehicle local time with the storing instruction to the first slave ECU, 
   the first slave ECU is further configured, on reception of the vehicle local time and the storing instruction from the master ECU:
 to associate the diagnostic information on the first slave ECU with the vehicle local time; and 
 to store the associated diagnostic information on the first slave ECU and the vehicle local time in the retention storage medium, and 
   the third slave ECU is configured, on reception of the vehicle local time and the storing instruction from the master ECU:
 to associate the diagnostic information on the third slave ECU with the vehicle local time; and 
 to store the associated diagnostic information on the third slave ECU and the vehicle local time in a retention storage medium, the retention storage medium being configured to retain validity determination information in a condition where the third slave ECU is not supplied with electric power. 
   
     
     
         7 . A vehicular system equipped to a vehicle, the vehicular system comprising:
 a first ECU; and   a second ECU, wherein   the first ECU is configured to transmit a storing instruction on detection of a malfunction, and   the second ECU is configured, on reception of the storing instruction transmitted from the first ECU:
 to generate diagnostic information on the second ECU; and 
 to store the generated diagnostic information on the second ECU in a retention storage medium, the retention storage medium being configured to retain validity determination information in a condition where the second ECU is not supplied with electric power. 
   
     
     
         8 . An ECU equipped to a vehicle, the ECU configured, on reception of a storing instruction from an outside:
 to generate diagnostic information on the ECU; and   to store the generated diagnostic information in a retention storage medium, the retention storage medium being configured to retain validity determination information in a condition where the ECU is not supplied with electric power.   
     
     
         9 . A storing instruction transmission device configured to transmit a storing instruction to a vehicular ECU, the vehicular ECU being configured, on reception of the storing instruction from an outside:
 to generate diagnostic information on the storing instruction transmission device; and   to store the generated diagnostic information in a retention storage medium, the retention storage medium being configured to retain validity determination information in a condition where the storing instruction transmission device is not supplied with electric power.   
     
     
         10 . The storing instruction transmission device according to  claim 9 , the storing instruction transmission device being equipped to a vehicle and configured, on reception of the storing request from an outside, to transmit the storing instruction to the vehicular ECU. 
     
     
         11 . A storing request transmission device configured to transmit the storing request to the storing instruction transmission device according to  claim 10 . 
     
     
         12 . An ECU communicable with a storing instruction transmission device, the ECU comprising:
 a storing request transmission unit configured, on detection of an anomaly by the ECU, to transmit a first storing request, which includes a first system identification code corresponding to the anomaly, to a storing instruction transmission device thereby to cause the storing instruction transmission device to transmit a first storing instruction, which includes the first system identification code; and   an instruction correspondence storing unit configured:
 to receive a second storing instruction, when the storing instruction transmission device transmits the second storing instruction on reception of a second storing request from a device other than the ECU; 
 to determine whether to store diagnostic information on the ECU, according to a second system identification code included in the received second storing instruction; and 
 to store diagnostic information, which includes data corresponding to the second system identification code, in a storage medium of the ECU, on determination to store. 
   
     
     
         13 . The vehicular system according to  claim 1 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         14 . The vehicular system according to  claim 7 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         15 . The ECU according to  claim 8 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         16 . The storing instruction transmission device according to  claim 9 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         17 . The ECU according to  claim 12 , wherein the retention storage medium is a non-volatile storage medium.