Vehicular system, ecu, storing instruction transmission device, and storage 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.

What is claimed is: 
     
         1 . 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. 
   
     
     
         2 . 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.   
     
     
         3 . 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.   
     
     
         4 . The storing instruction transmission device according to  claim 3 , 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. 
     
     
         5 . A storing request transmission device configured to transmit the storing request to the storing instruction transmission device according to  claim 4 . 
     
     
         6 . 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. 
   
     
     
         7 . The vehicular system according to  claim 1 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         8 . The ECU according to  claim 2 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         9 . The storing instruction transmission device according to  claim 3 , wherein the retention storage medium is a non-volatile storage medium. 
     
     
         10 . The ECU according to  claim 6 , wherein the retention storage medium is a non-volatile storage medium.